DOCSLIB.ORG

New Development of HSLA Steels in China

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
New Development of HSLA Steels in China 7th International Conference on High Strength Low Alloy Steels (HSLA Steels 2015), International Conference on Microalloying 2015 (Microalloying 2015) and International Conference on Offshore Engineering Steels 2015 (OES 2015) Hanghou, China 11 - 13 November 2015 Volume 1 of 2 ISBN: 978-1-5108-2440-9 Printed from e-media with permission by: Curran Associates, Inc. 57 Morehouse Lane Red Hook, NY 12571 Some format issues inherent in the e-media version may also appear in this print version. Copyright© (2015) by the Minerals, Metals & Materials Society All rights reserved. Printed by Curran Associates, Inc. (2016) For permission requests, please contact John Wiley & Sons at the address below. John Wiley & Sons 111 River Street Hoboken, NJ 07030-5774 Phone: (201) 748-6000 Fax: (201) 748-6088 [email protected] Additional copies of this publication are available from: Curran Associates, Inc. 57 Morehouse Lane Red Hook, NY 12571 USA Phone: 845-758-0400 Fax: 845-758-2633 Email: [email protected] Web: www.proceedings.com TABLE OF CONTENTS Preface ....................................................................................................................................................................xv Acknowledgements ..............................................................................................................................................xvii Plenary Session New Development of HSLA Steels in China ............................................................................................................3 Xiao-gang ZHANG, Cai-fu YANG, and Cheng-jia SHANG Microalloyed Steels: Past, Present and Future ........................................................................................................17 Anthony J. DeArdo Niobium in Microalloyed Rail Steels .....................................................................................................................33 A. Ray and H.K.D.H. Bhadeshia Niobium Solar Mobile Project – High Strength Niobium Microalloyed Steel as a Solution to Improve Electric Super Scooter and Motorcycle Performance .....................................................41 Terry Richards, Erik Kauppi, Lauren Flanagan, Eduardo A.A.G. Ribeio, Marcos A. Stuart Nogueira, and Ian McCourtney Evolution of Microalloyed Steels Since Microalloying ’75 with Specific Emphasis on Linepipe and Plate .............................................................................................................................53 J. Malcolm Gray and F. Barbaro Modern Niobium Microalloyed Steels for the Automotive Industry ......................................................................71 Debanshu Bhattacharya Design of Reforma 509 with High Strength Steel ..................................................................................................85 Stuart Smith, William Whitby, and Marc Easton Microalloyed Engineering Steels with Improved Performance ..............................................................................97 Wolfgang Bleck, Margarita Bambach, and Vera Wirths Weldability of HSLA Steels in Relation to Appropriate Toughness Requirements for Use in Safe and Economic Steel Construction ................................................................................................109 P. Langenberg, S. Münstermann, M. Feldmann, and U. Reisgen Technical Requirements for the Development of Marine Steel in China .............................................................121 Hang SU, Tao PAN, Feng CHAI, and Caifu YANG Physical Metallurgy Effect of Nitrogen on Transformation Behaviors and Microstructure of V-N Microalloyed Steel .......................135 Zhao Baochun, Zhao Tan, Li Guiyan, and Lu Qiang Quantifying the Effect of Nb and Mo on Transformation Products Using Advanced EBSD Analysis ................143 Jennifer M. Reichert and Matthias Militzer Decomposition of Supercooled Austenite in Continuous Cooling Transformation Process of a Mn-Mo-Ni Low Alloy Steel .............................................................................................................151 C.W. Li, L.Z. Han, Q.D. Liu, X.G. Tao, J.F. Gu, and W.M. Zhang Effect of High Magnetic Field on the Pearlite Transformation of Hypoeutectoid Steel .......................................159 Li Jing and Zhang Guohong v Study of Chemical Composition and Thermal Stability of Reverted Austenite in QLT-Treated 9%Ni Steel ...................................................................................................................................165 Pan Tao, Yang Caifu, and Su Hang Thermodynamic Calculations and Precipitation Simulations of HSLA Steels ....................................................173 Shan Jin, Qing Chen, and Johan Bratberg Determination of Dynamic Recrystallization Process by Equivalent Strain ........................................................179 Xiaomei Qin and Wei Deng High-Strength Low-Alloy Steel Strengthened by Multiply Nanoscale Microstructures ......................................187 Y.F. Shen and L. Zuo Grain Refinement and Toughening of Low Carbon Low Alloy Martensitic Steel with Yield Strength 900 MPa Grade by Ausforming ....................................................................................................195 Zhaodong Li, Xinjun Sun, Zhigang Yang, and Qilong Yong Effect of Mo Addition on the Precipitation Behavior of Carbide in Nb-Bearing HSLA Steel .............................203 Zhengyan Zhang, Qilong Yong, Xinjun Sun, Zhaodong Li, Zhengqiang Wang, Shitong Zhou, and Guodong Wang Application of Nano-Scale Precipitate Engineering of TiN-NbC Composite in 32mm K60-E2 Grade Plate Rolling ...............................................................................................................................................211 S.V. Subramanian, Ma Xiaoping, Nie Wenjin and Zhang Xiaobing Precipitation Behavior of Nanometer-Sized Carbides in a Nb-Ti-Bearing Low-Carbon Steel ............................223 Li Xiaolin, Wang Zhaodong, Deng Xiangtao, Yang Yong, Song Dan, and Wang Guodong Measurement Uncertainty of Mechanical Property in Tensile Tests: Strain Rate Embrittlement of HSLA Steels ..........................................................................................................................................................229 Tingdong Xu, Chong Shao and Kai Wang The Influence of Mo, Cr and B Alloying on Phase Transformation and Mechanical Properties in Nb Added High Strength Dual Phase Steels .....................................................................................................237 O. Girina, N. Fonstein, O. Yakubovsky, D. Panahi, D. Bhattacharya, and S. Jansto The Influence of Carbon Content and Cooling Rate on the Toughness of Mn-Mo-Ni Low-Alloy Steels............247 Huibin Liu and Hanqian Zhang Comparative Analysis of Precipitation Effects in Microalloyed Austenite and Ferrite Under Hot and Cold Forming Conditions .....................................................................................................................................253 Krzysztof Muszka, Marcin Kwiecien, Janusz Majta, and Eric J. Palmiere Niobium-Based Alloy Design for Structural Applications: Processing-Structure-Property Paradigm .................261 Devesh Misra Influence of Micro-Texture on Delamination of Hot-Rolled High Strength Low Alloyed Steel Sheets ..............267 Sungil Kim, Shi-Hoon Choi, Sung-Hwan Kim, Seok-Jong Seo and In-Shik Suh Effect of Initial Microstructure on the Mechanical Properties of an Intercritically Quenched and Tempered HB400 Grade Heavy Plate ............................................................................................................273 Zhen Fan, Qu Jinbo, Zhang Kuan, and Qiao Kun Thermomechanical Processing of Structural Steels with Dilute Niobium Additions ...........................................281 Z. Cui, J. Patel, and E.J. Palmiere Application of In-Situ Material Characterization Methods to Describe Role of Mo During Processing of V-Bearing Micro-Alloyed Steels ......................................................................................................................289 Vit Janik, Sam Clark, Prakash Srirangam, Arjan Rijkenberg, and Sridhar Seetharaman vi Effect of Heating Temperature on the Growth Behavior of Austenite Grain of Titanium Micro-Alloyed Steel ..............................................................................................................................................297 Xu Luo, Yong-Lin Kang, Cai-Shui Yang, and Jun-Hong Li Process Metallurgy Through-Thickness Homogenization in Thin Slab Direct Rolling of Nb Microalloyed Steels ............................309 B. Pereda, P. Uranga, B. López, J.M. Rodriguez-Ibabe, D. Stalheim, R. Barbosa, and M.A. Rebellato Study on the Control of Cleanliness for X90 Pipeline in the Secondary Refining Process ..................................317 Ren Sheng Chu, Jin Gang Liu, and Zhan Jun Li Hot Strength during Coiling of Low C and Nb-Microalloyed Steels ...................................................................323 R. Maubane, K.M. Banks, and A.S. Tuling. Research of Helical Magnetic Field Stirrer in Bloom Continuous Casting ..........................................................329 Guo Qing-Tao, Liao Xiang-Wei, Jia Ji-Xiang, Huang Yu-Ping, Tang Xue-Feng, and Zou Huan Modelling Microstructure Evolution during Hot Rolling of HSLA Steels in a Steckel Mill ...............................335 W. Almeida, H. Rodrigues, M. Rebellato, F. Bastos, and R. Barbosa The Influence of Vanadium Microalloying
Load more

Recommended publications
  • The Old Master
    INTRODUCTION Four main characteristics distinguish this book from other translations of Laozi. First, the base of my translation is the oldest existing edition of Laozi. It was excavated in 1973 from a tomb located in Mawangdui, the city of Changsha, Hunan Province of China, and is usually referred to as Text A of the Mawangdui Laozi because it is the older of the two texts of Laozi unearthed from it.1 Two facts prove that the text was written before 202 bce, when the first emperor of the Han dynasty began to rule over the entire China: it does not follow the naming taboo of the Han dynasty;2 its handwriting style is close to the seal script that was prevalent in the Qin dynasty (221–206 bce). Second, I have incorporated the recent archaeological discovery of Laozi-related documents, disentombed in 1993 in Jishan District’s tomb complex in the village of Guodian, near the city of Jingmen, Hubei Province of China. These documents include three bundles of bamboo slips written in the Chu script and contain passages related to the extant Laozi.3 Third, I have made extensive use of old commentaries on Laozi to provide the most comprehensive interpretations possible of each passage. Finally, I have examined myriad Chinese classic texts that are closely associated with the formation of Laozi, such as Zhuangzi, Lüshi Chunqiu (Spring and Autumn Annals of Mr. Lü), Han Feizi, and Huainanzi, to understand the intellectual and historical context of Laozi’s ideas. In addition to these characteristics, this book introduces several new interpretations of Laozi.
    [Show full text]
  • The Effects Heat Treatment on Mechnical Properties Of
    EFFECTS OF VARIOUS QUENCHING MEDIA ON THE MECHANICAL PROPERTIES OF INTERCRITICALLY ANNEALED 0.15Wt%C – 0.43Wt%Mn STEEL P. O. Offor, C.C. Daniel, D. O. N. Obikwelu Metallurgical and Materials Engineering Department, University of Nigeria, Nsukka. [email protected] ABSTRACT Effects of various quenching media on the mechanical properties of intercritically annealed 0.15wt%C – 0.43wt%Mn were studied. Prequenching of a hot rolled low carbon steel was previously done from 900oC (within the full austenitic range) using SAE 40 engine oil as quenchant. Sets of steel samples made from the previously quenched steel samples were intercritically heat treated from 750oC to 810oC at intervals of 10oC for 1 hr in a laboratory muffle furnace and quenched in SAE 40 engine oil, water and brine quenchants respectively. The effects of quenching media used and the intercritical annealing temperatures on tensile, hardness, ductility and notch impact toughness properties are discussed. The quenching media increased the strength and hardness properties but decreased the ductility and notch impact properties of the original hot-rolled steel. Steel quenched in brine had the highest strength (708.02N/mm2 at 810C) and hardness values (233 BHN at 810C) followed by those quenched in water (666.73 N/mm2 at 810C and 226 BHN at 810C respectively) while those quenched in oil had the least values (618.56 N/mm2 at 810C and 215 BHN at 810C respectively). Steel quenched in oil had highest ductility and notch impact toughness values (24.07% at 750C and 22.8 J/cm 2 at 750C respectively), followed by those quenched in water (20.33% at 750C and 18.14 J/cm 2 at 750C respectively) while those quenched in brine had the least values (16.49% at 750C and 13.96 J/cm 2 at 750C respectively).
    [Show full text]
  • An Explanation of Gexing
    Front. Lit. Stud. China 2010, 4(3): 442–461 DOI 10.1007/s11702-010-0107-5 RESEARCH ARTICLE XUE Tianwei, WANG Quan An Explanation of Gexing © Higher Education Press and Springer-Verlag 2010 Abstract Gexing 歌行 is a historical and robust prosodic style that flourished (not originated) in the Tang dynasty. Since ancient times, the understanding of the prosody of gexing has remained in debate, which focuses on the relationship between gexing and yuefu 乐府 (collection of ballad songs of the music bureau). The points-of-view held by all sides can be summarized as a “grand gexing” perspective (defining gexing in a broad sense) and four major “small gexing” perspectives (defining gexing in a narrow sense). The former is namely what Hu Yinglin 胡应麟 from Ming dynasty said, “gexing is a general term for seven-character ancient poems.” The first “small gexing” perspective distinguishes gexing from guti yuefu 古体乐府 (tradition yuefu); the second distinguishes it from xinti yuefu 新体乐府 (new yuefu poems with non-conventional themes); the third takes “the lyric title” as the requisite condition of gexing; and the fourth perspective adopts the criterion of “metricality” in distinguishing gexing from ancient poems. The “grand gexing” perspective is the only one that is able to reveal the core prosodic features of gexing and give specification to the intension and extension of gexing as a prosodic style. Keywords gexing, prosody, grand gexing, seven-character ancient poems Received January 25, 2010 XUE Tianwei ( ) College of Humanities, Xinjiang Normal University, Urumuqi 830054, China E-mail: [email protected] WANG Quan International School, University of International Business and Economics, Beijing 100029, China E-mail: [email protected] An Explanation of Gexing 443 The “Grand Gexing” Perspective and “Small Gexing” Perspective Gexing, namely the seven-character (both unified seven-character lines and mixed lines containing seven character ones) gexing, occupies an equal position with rhythm poems in Tang dynasty and even after that in the poetic world.
    [Show full text]
  • The Simulation of Long-Range Transport of Biomass Burning
    Aerosol and Air Quality Research, 16: 2933–2949, 2016 Copyright © Taiwan Association for Aerosol Research ISSN: 1680-8584 print / 2071-1409 online doi: 10.4209/aaqr.2015.07.0440 The Simulation of Long-Range Transport of Biomass Burning Plume and Short-Range Transport of Anthropogenic Pollutants to a Mountain Observatory in East Asia during the 7-SEAS/2010 Dongsha Experiment Ming-Tung Chuang1*, Joshua S. Fu2, Chung-Te Lee3, Neng-Huei Lin4, Yang Gao2†, Sheng-Hsiang Wang4, Guey-Rong Sheu4, Ta-Chih Hsiao3, Jia-Lin Wang5, Ming-Cheng Yen4, Tang-Huang Lin6, Narisara Thongboonchoo7 1 Graduate Institute of Energy Engineering, National Central University, Chung-Li 32001, Taiwan 2 Department of Civil and Environmental Engineering, University of Tennessee, Knoxville, TN, USA 3 Graduate Institute of Environmental Engineering, National Central University, Chung-Li 32001, Taiwan 4 Graduate Institute of Atmospheric Physics, National Central University, Chung-Li 32001, Taiwan 5 Department of Chemistry, National Central University, Chung-Li 32001, Taiwan 6 Center for Space and Remote Sensing Research, National Central University, Chung-Li 32001, Taiwan 7 College of Chemical Engineering, King Mongkut's Institute of Technology, Bangkok, Thailand ABSTRACT The Community Multi-scale Air Quality Model (CMAQ) is used to simulate the long-range transport of biomass burning (BB) pollutants from Southeast Asia (SEA) towards the Taiwan Central Mountain Range (CMR) in March and April 2010. The results show that a proportion of the BB plume was blocked and compressed at the windward side of CMR. High-altitude BB plume is shown to influence air quality on the ground via three mechanisms: (1) the subsidence in the anticyclone, (2) the downward motion in the cold surge, and (3) the vertical mixing of the boundary layer over land.
    [Show full text]
  • Application of High Strength Microalloyed Steel in a New Automotive Crankshaft
    Application of High Strength Microalloyed Steel in a New Automotive Crankshaft Young Sang Ko, Jin Woo Park, Hyounsoo Park, Jong Dae Lim Hyundai and Kia Motor Company Research and Development Division 722-1, Changduk Whasung, Kyunggi 445-850 Korea Tel: 82-31-368-7355 Fax: 82-31-368-7355 E-mail: [email protected], [email protected] David K. Matlock Advanced Steel Processing and Products Research Center Colorado School of Mines Golden, CO 80401 Tel: 303-273-3025 Fax: 303-273-3016 E-mail: [email protected] Key Words: microalloyed steel, forging, crankshaft INTRODUCTION Applications of steels for new forged automotive components require a complete understanding of material properties and design requirements. Today there are many potential combinations of steel bar compositions and surface hardening methods that can be employed. Generally plain carbon steels, alloy steels, and microalloyed steels are used for forged bar applications and nitriding, induction hardening, or fillet rolling are applied to selected highly-stressed areas to produced optimum performance. At the preliminary stage in the design of a new model several factors must be considered. Cost, infrastructure requirements, and lead time are considered together to ensure proper selection of material alloy and hardening method. Currently many crankshaft forging companies have eliminated quenching and tempering (Q&T) heat-treatment facilities from their shops, and thus in the production of crankshafts it is not easy to apply alloy steels that require Q&T processing. The use of microalloyed steels in crankshafts have been shown to be a viable alternative to Q&T steels, particularly in engines that require significant improvements in performance [1].
    [Show full text]
  • The Later Han Empire (25-220CE) & Its Northwestern Frontier
    University of Pennsylvania ScholarlyCommons Publicly Accessible Penn Dissertations 2012 Dynamics of Disintegration: The Later Han Empire (25-220CE) & Its Northwestern Frontier Wai Kit Wicky Tse University of Pennsylvania, [email protected] Follow this and additional works at: https://repository.upenn.edu/edissertations Part of the Asian History Commons, Asian Studies Commons, and the Military History Commons Recommended Citation Tse, Wai Kit Wicky, "Dynamics of Disintegration: The Later Han Empire (25-220CE) & Its Northwestern Frontier" (2012). Publicly Accessible Penn Dissertations. 589. https://repository.upenn.edu/edissertations/589 This paper is posted at ScholarlyCommons. https://repository.upenn.edu/edissertations/589 For more information, please contact [email protected]. Dynamics of Disintegration: The Later Han Empire (25-220CE) & Its Northwestern Frontier Abstract As a frontier region of the Qin-Han (221BCE-220CE) empire, the northwest was a new territory to the Chinese realm. Until the Later Han (25-220CE) times, some portions of the northwestern region had only been part of imperial soil for one hundred years. Its coalescence into the Chinese empire was a product of long-term expansion and conquest, which arguably defined the egionr 's military nature. Furthermore, in the harsh natural environment of the region, only tough people could survive, and unsurprisingly, the region fostered vigorous warriors. Mixed culture and multi-ethnicity featured prominently in this highly militarized frontier society, which contrasted sharply with the imperial center that promoted unified cultural values and stood in the way of a greater degree of transregional integration. As this project shows, it was the northwesterners who went through a process of political peripheralization during the Later Han times played a harbinger role of the disintegration of the empire and eventually led to the breakdown of the early imperial system in Chinese history.
    [Show full text]
  • Effects of Heat-Treatment Temperature on the Microstructure and Mechanical Properties of Steel by Mgo Nanoparticle Additions
    materials Article Effects of Heat-Treatment Temperature on the Microstructure and Mechanical Properties of Steel by MgO Nanoparticle Additions Yutao Zhou 1, Shufeng Yang 1,*, Jingshe Li 1, Wei Liu 1 and Anping Dong 2,* 1 School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China; [email protected] (Y.Z.); [email protected] (J.L.); [email protected] (W.L.) 2 School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China * Correspondence: [email protected] (S.Y.); [email protected] (A.D.); Tel.: +86-10-6233-4277 (S.Y.) Received: 9 August 2018; Accepted: 9 September 2018; Published: 13 September 2018 Abstract: The characteristics and formation mechanisms of intragranular acicular ferrite (IAF) in steel with MgO nanoparticle additions were systematically investigated for different isothermal heat-treatment temperatures, and its influence on mechanical properties was also clarified. The results indicate that the inclusions were finely dispersed and refined after adding MgO nanoparticles. In addition, with decreasing heat-treatment temperature, the microstructure changed from grain boundary ferrite (GBF) and polygonal ferrite (PF) to intragranular acicular ferrite. Moreover, the steel with MgO additions had excellent mechanical properties in the temperature range of 973 to 823 K and an average Charpy absorbed energies value of around 174 J at 873 K due to the significant refinement of the microstructure and nucleation of intragranular acicular ferrite. Keywords: microstructure; oxide metallurgy; mechanical properties; intragranular acicular ferrite 1. Introduction With the development of a new generation of steel materials, the cleanliness of steel has been significantly improved [1–3].
    [Show full text]
  • A Brief Analysis of Du Fu's Thought of Suffering and Artistic Expression
    Advances in Social Science, Education and Humanities Research, volume 185 6th International Conference on Social Science, Education and Humanities Research (SSEHR 2017) A Brief Analysis of Du Fu's Thought of Suffering and Artistic Expression Xie Lina Weinan Normal University, College Humanism, Weinan, Shaanxi, 714000 Keywords: Du Fu, Anxiety, Artistic Expression Abstract: Du Fu is the most famous realistic poet of the Tang Dynasty in our country. His poetry reflects the tempo late to Dali Period of social reality, the outstanding performance of its attention to the fate of the motherland, the sufferings of people's sympathy and strong criticism of the wealthy elite of evil, embodies the profound patriotism and sympathy for the feelings of the people. Therefore, he was honored as the "Saint", known as "the epic poem". This paper tries to explore the thought and artistic expression of his misery poetry. 1. Du Fu's Life and Thought Du Fu (712-770) born in Henan Gongxian, sub word beauty and whose ancestral home was Jing Zhao Du Ling, My grandfather was a famous poet of the age of Wu Zetian s father, Du made official idle. Family "Shou Feng Ru Guan" tradition has certain influence on Du Fu's thoughts and creation, but the greatest impact is the era of Du Fu's life and his life experience [1]. His life can be divided into four periods: reading and grand period (AD 731 - 745 years): this period lasted for more than 10 years, before and after the three poets Wu Yue, Qi Zhao, Song Liang and other roaming, visited the beautiful magnificent mountains and scenery.
    [Show full text]
  • HSLA Steels'2011)
    The 6th International Conference on High Strength Low Alloy Steels (HSLA Steels'2011) Beijing, China May 31-June 2, 2011 Organized by The Chinese Society for Metals CONTENTS Plenary Sessions The State-of-Art and Development Trends of HSLA Steels in China WENG Yu-qing, YANG Cai-fu, SHANG Cheng-jia 1 Modern Microalloyed Steels Garcia C Issac, Suikkanen Pasi P, Hua Mingjian, Deardo Anthony J 14 The Development ofAdvanced HSLA Steel in Angang in Low Carbon Age ZHANG Xiao-gang 22 Different Roles for Vanadium as a Microalloying Element in Structural Steels Hutchinson Bevis 29 Development and Application ofHigh Performance X80 Line Pipe for the 2nd West-East Gas Pipeline LI He-lin, HUO Chun-yong, JI Ling-kang, LI Yang 3 9 Advanced HSLA Steels for Automotive Use Sekita Takashi, Seto Kazhiro, Funakawa Yoshimasa 49 Niobium in Microalloyed Steels Unchallenged for Its MainApplications Nogueira Marcos A Stuart, Carneiro Tadeu 57 High-Strength Nanostructured Cold-Resistant Steels for Continental Shelf Development Oryshchenko A S, Khlusova E I, Orlov V V 66 Latest Progress of Low-Alloy High-Strength Steels in Baosteel LU Jiang-xin 72 Microalloyed Steels for Heat Treating Applications at Higher Process Temperatures David K. Matlock, John G. Speer, Steven G. Jansto, Marcus Stuart 80 High Performance Structural Steels for Shipbuilding and Offshore Structures Choo Wung-Yong, Suh In-Shik, Kim Sang-ho, An Gyu-Baek, Lee Chang-Sun 90 Research and Practice of Production Technology for High Performance Low Alloy Steels in WISCO FU Lian-chun, GUO Ai-ming, LIU Ji-bin,
    [Show full text]
  • Review of Microalloyed Structural Plate Metallurgy
    REVIEW OF MICROALLOYED STRUCTURAL PLATE METALLURGY - ALLOYING, ROLLING, HEAT TREATMENT Heinrich Baumgardt", Harald F. de Boer*, Friedrich Heisterkamp** *Thyssen A.G. - Forschung Kaiser-Wilhelm-Strasse 100 41 Duisburg 11 Hamborn West Germany **Niobium Products Company Limited Wagnerstrasse 4 D-4000 hesseldorf West Germany Abstract The historical development of structural steels and their main require- ments are presented. The reduction of the carbon content and the use of microalloying and alloying elements for grain refinement as well as for precipitation and solid solution hardening led to HSLA steel grades with good toughness and weldability. Modern technologies in steelmaking, hot rolling and heat treatment in combination with the chemical composition are used for an economical production of plates with special requirements. The rules and recommendations for fabrication are mentioned. Cumulative frequencies of mechanical properties and some examples of completed structures show the successful application of microalloyed steels. 883 Introduction At the present time high strength low alloyed (HSLA) steels are readily available. These steels have good resistance to brittle fracture and a favorable behavior during manufacture. This review outlines the development of these steels by pointing to the importance of alloying, rolling and heat treatment. The transfer of fundamental physical metallurgical knowledge into the production of hot rolled microalloyed steels is discussed. This transfer takes place by means of modern steel making and rolling procedures and it is shown which level of properties can be achieved in large scale production. The behavior during manufacturing is illustrated by some characteristic examples. Historical Development The main requirements for structural steels are high strength, brittle fracture resistance and favorable processing behavior.
    [Show full text]
  • Du Fu and Chinese Poetic Expression: How Politics, Nature, and Self Become One
    Portland State University PDXScholar Young Historians Conference Young Historians Conference 2019 May 1st, 10:30 AM - 11:45 AM Du Fu and Chinese Poetic Expression: How Politics, Nature, and Self Become One Binhnam Nguyen Grant High School Follow this and additional works at: https://pdxscholar.library.pdx.edu/younghistorians Part of the Chinese Studies Commons, Intellectual History Commons, and the Poetry Commons Let us know how access to this document benefits ou.y Nguyen, Binhnam, "Du Fu and Chinese Poetic Expression: How Politics, Nature, and Self Become One" (2019). Young Historians Conference. 18. https://pdxscholar.library.pdx.edu/younghistorians/2019/oralpres/18 This Event is brought to you for free and open access. It has been accepted for inclusion in Young Historians Conference by an authorized administrator of PDXScholar. Please contact us if we can make this document more accessible: [email protected]. Du Fu and Chinese Poetic Expression: How Politics, Nature, and Self Become One Nam Nguyen PSU HST 105 1 May 2019 Nguyen 1 Born in 712 C.E., Du Fu is regarded as one of the most influential classical Chinese poets. He was born into an aristocratic family during the Tang Dynasty (618 – 917), but after the An Lushan Rebellion (755 – 763) reached the capital of Chang’an in 756 where he was living, he was forced to flee from the city with his family. The Tang Dynasty started out strong, flourishing politically, economically, and within the arts and literature, but the second half of its rule was littered with conflicts, having failed to recover from the damages done by the Rebellion.1 It was not until the latter half of Du’s life, during that period of dynastic wars and instability, that he began writing poetry.
    [Show full text]
  • Wang Fu's “Qian Fu Theory” Inheriting and Developing Han Fei's Thought
    2020 3rd International Workshop on Advances in Social Sciences (IWASS 2020) Wang Fu's “Qian Fu Theory” Inheriting and Developing Han Fei's Thought Chen Lin, Ma Shinian* Lanzhou, Northwest Normal University, 730010, China *Corresponding Author Keywords: Han fei, Wang fu, Ideological inheritance, Ideological development Abstract: Han Fei is a master of legalist thought, and Wang Fu is one of the most representative thinkers in the Eastern Han Dynasty. Because of the great similarity of the characteristics of the times they lived in, Wang Fu absorbed Han Fei's thoughts of rule of law and the art of governing the officials in order to save the country and the people, enrich the country and strengthen the army, and directly inherited and integrated them into his Confucianism based ideological system. At the same time, it can be seen that in terms of the theory of human nature, the shaping of human nature advocated by Wang Fu is a development of Han Fei's view of human nature seeking benefits and avoiding disadvantages. In the aspect of national education, the combination of morality and punishment is the development of Han Fei's teaching by law. On the economic front, 100 businesses were originally the development of Korea's non-agricultural business philosophy. 1. Introduction Wang Fu is one of the most representative Confucian scholars in the Eastern Han Dynasty. However, Wang Jipei, a scholar in the Qing Dynasty, pointed out: “He learned to compromise confucius, but he also dabbled in the name of Shen Shang, Hanfei, and did not become a pure confucius.” It can be found by carefully reading the text of Qian Fu theory that words such as “law”, “punishment”, “reward” and “punishment” appear frequently, while Wang continues to cultivate and annotate “Qian Fu theory”, citing the secondary data of Han Feizi, Mr.
    [Show full text]