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Vancron 40 Eng R1509 E10 Uddeholm Vancron 40 SuperClean Uddeholm Vancron®40 SuperClean 1 Uddeholm Vancron 40 SuperClean Uddeholm Vancron® 40 SuperClean Uddeholm Vancron 40 SuperClean is a nitrided powder tool steel, which means that a “surface coating” is already integrated into the finished tooling material. The result is a tool surface with very low friction that reduces galling or sticking of the material. Uddeholm Vancron 40 SuperClean offers the possibility of eliminating time- and cost-consuming surface coatings like PVD or TD. This is achieved already in the manufacturing process of Uddeholm Vancron 40 SuperClean by introducing an extra nitriding operation. Benefits for the tool user include improved and consistent quality of the manufactured parts, especially regarding the surfaces. More reliable delivery time and higher utilization of the production equipment are also benefits, with fewer disturbances and interruptions in production. Further improvements include simplified maintenance, which can often be made in-house as no surface coating is required; and as well, total tool life is increased. The tool maker can produce a high quality tool that does not require any surface coating, which means a shorter delivery time and freedom to make adjustments after the heat treatment. In total this means that the product quality will be uniform from the first part produced to the last and that a tool manufactured in Uddeholm Vancron 40 SuperClean will make it easier for you to keep your promises! VANCRON® IS A TRADEMARK REGISTERED BY UDDEHOLMS AB © UDDEHOLMS AB No part of this publication may be reproduced or transmitted for commercial purposes without permission of the copyright holder. This information is based on our present state of knowledge and is intended to provide general notes on our products and their uses. It should not therefore be construed as a warranty of specific properties of the products described or a warranty for fitness for a particular purpose. Classified according to EU Directive 1999/45/EC For further information see our “Material Safety Data Sheets”. Edition 11, 09.2016 2 Uddeholm Vancron 40 SuperClean CRITICAL TOOL STEEL APPLICATIONS PROPERTIES Uddeholm Vancron 40 SuperClean is a cold work tool steel with an excellent galling/ FOR GOOD TOOL PERFORMANCE adhesive wear profile, which makes the steel In many cold work applications tools are ideal for severe production conditions and/or surface coated in order to prevent galling and long run production in applications where adhesive wear. surface coated tool steel is needed. The work Furthermore it is important to have the materials in these applications are often soft/ correct hardness for the applications as well adherent materials such as austenitic and as a sufficient ductility and toughness in order ferritic stainless steel, mild steel, copper, to prevent premature failure due to chipping/ aluminium, etc. crack formation. Uddeholm Vancron 40 SuperClean should Uddeholm Vancron 40 SuperClean is a be used in cold work applications where the nitrided powder metallurgical tool steel offer- predominant failure mechanisms are adhesive ing an excellent combination of galling resist- wear or galling. ance and adhesive wear resistance. Typical applications are: • Blanking and forming FOR TOOL MAKING • Cold extrusion • Deep drawing • Machinability • Powder pressing • Heat treatment • Grinding • An alternative to tooling when coatings and • Dimensional stability in heat treatment cemented carbide used to be the only • Surface treatment solution Tool making with highly alloyed tool steel means that machining and heat treatment are often more of a problem than with the lower GENERAL alloy grades. This can, of course, raise the Uddeholm Vancron 40 SuperClean is a cost of tool making. Cr-Mo-W-V-N alloyed cold work tool steel, The powder manufacturing route used for which is characterized by Uddeholm Vancron 40 SuperClean means that •Very high adhesive wear resistance its machinability is superior to that of similar •Very high galling resistance conventionally produced grades and some • Good chipping and cracking resistance highly alloyed cold work tool steel. • High compressive strength The dimensional stability of Uddeholm Vancron 40 SuperClean in heat treatment is • Good through hardening properties good and predictable compared to conven- • Good dimensional stability in hardening tionally produced high alloy steel. •Very good resistance to tempering back Uddeholm Vancron 40 SuperClean is • Good WEDM properties designed to be used without surface coating as it contains a high amount of low friction vanadium rich nitrides in the matrix. Typical C N Si Mn Cr Mo W V analysis % 1.1 1.8 0.5 0.4 4.5 3.2 3.7 8.5 Standard specification None Delivery condition Soft annealed to approx. 300 HB Colour code Dark blue/Gold 3 Uddeholm Vancron 40 SuperClean PROPERTIES HEAT TREATMENT PHYSICAL DATA SOFT ANNEALING After hardening and tempering to 61 HRC Protect the steel and heat through to 900°C (1650°F). Then cool in the furnace at 10°C/h Temperature 20°C 200°C 400°C (20°F/h) to 650°C (1200°F), then freely in air. (68°F) (390°F) (750°F) Density kg/m3 7 700 – – STRESS RELIEVING lbs/in3 0.278 After rough machining the tool should be Modulus of heated through to 600–700 C (1110–1290 F), elasticity ° ° MPa 236 000 227 000 213 000 holding time 2 hours. Cool slowly to 500°C 6 6 6 psi 35.2 x 10 32.9 x 10 30.9 x 10 (930°F), then freely in air. Coefficient of thermal expan- sion per HARDENING °C from 20°C–11.1 x 10-6 11.9 x 10-6 °F from 68°F 6.1 x 10-6 6.6 x 10-6 The hardenability for Uddeholm Vancron 40 Thermal SuperClean is equivalent to Uddeholm Vana- conductivity dis 23 SuperClean, which ensures good W/m •°C–21 ±2 25 ±0.5 Btu in/ft2 h °F 145 ±14 173 ±3 through hardening properties at quenching in salt bath or gas quenching in vacuum furnace. Specific heat J/kg °C 460 – – Pre-heating in two stages: 600–650°C (1110– Btu /lb °F 0.11 1200°F) and 850–900°C (1560–1650°F). Austenitizing temperature: 950–1150°C (1740– COMPRESSIVE STRENGTH 2100°F) normally 1020°C (1870°F). Holding time: 30 minutes (10 minutes at Approximately compressive strength vs. 1100°C (2010°F) and above. hardness is shown in the table below. The tool should be protected against decar- Hardness Compressive yield strength burization and oxidation during hardening. HRC Rc0.2 (MPa) In some cases denitriding should also be 58 2200 considered. To avoid loss of nitrogen, which 60 2500 62 2700 may lower the surface hardness, a minimum of 64 3000 10 mbar and up to 3–400 mbar nitrogen overpressure is recommended during harden- ing. Alternatively the machining allowance UNNOTCHED IMPACT ENERGY could be increased. Unnotched impact energy for Uddeholm Uddeholm Vancron 40 SuperClean can be Vanadis 23 SuperClean, Uddeholm Vancron heat treated to give a wide range of hardness. 40 SuperClean, a PM 10V type of steel and To achieve a hardness between 58–65 HRC AISI D2 is shown below. the austenitizing temperature is varied in the range 950–1150°C (1740–2100°F). The recom- Unnotched impact energy, mended austenitizing temperature is 1020°C relative values (1865°F) with 30 minutes holding time 60 HRC Hardness, HRC 68 Tempering =560°C (1040°F)/3 x 1h 66 64 62 60 58 56 Vanadis 23 Vancron 40 PM 10V type AISI D2 950 1000 1050 1100 1150 Austenitizing temperature °C 4 Uddeholm Vancron 40 SuperClean followed by quenching and tempering at 560°C (1040°F)/3 x 1 h resulting in a hardness of 60–62 HRC. In order to avoid a too low working hardness it is recommended to austenitize at a higher hardening temperature than normal and if the hardness will be too high temper down the hardness to the right hardness level. CCT-GRAPH (CONTINUOUS COOLING) Austenitizing temperature 1050°C (1920°F). Holding time 30 minutes. °F °C 2000 1100 Austenitizing temperature 1050°C Holding time 30 min. 1800 1000 Ac 1f 900 1600 = 880°C Ac 1s 800 = 830°C 1400 Carbides 700 Pearlite 1200 Cooling T Curve Hardness 800–500 600 No. HV 10 (sec) 1000 1 882 1 500 2 882 28 800 400 3 882 140 Bainite 600 300 4 882 280 400 200 5 882 1390 Ms 6 762 3205 200 100 1 2 3 4 5 6 7 7 493 7320 1 10 100 1 000 10 000 100 000 Seconds 1 10 100 1 000 Minutes 1 10 100 Hours Air cooling of 0.2 1.5 10 90 600 bars, Ø mm TTT-GRAPH (ISOTHERMAL TRANSFORMATION) Austenitizing temperature 1050°C (1920°F). Holding time 30 minutes. °F °C 2000 1100 Austenitizing temperature 1050°C Holding time 30 min. 1800 1000 Ac Temp. Time Hardn. 1f °C hours HV 10 900 1600 = 880°C Ac 750 4,9 354 1s 800 = 830°C 1400 Carbides Pearlite 725 1,6 383 700 1200 700 14,1 383 600 650 14,5 433 1000 500 600 63,3 613 800 400 400 8,1 946 600 300 350 6,5 657 Bainite 400 200 300 7,7 620 250 2,0 933 200 100 Martensite 200 20,1 858 1 10 100 1 000 10 000 100 000 Seconds 1 10 100 1 000 Minutes 1 10 100 Hours 5 Uddeholm Vancron 40 SuperClean QUENCHING MEDIA DIMENSIONAL CHANGES •Vacuum furnace with high speed gas at Dimensional changes after hardening and sufficient overpressure (2–5 bar) tempering. • Martempering bath or fluidized bed at Heat treatment: austenitizing between 950– approx. 550°C (1020°F) 1100°C (1740–2010°F)/30 minutes and tem- • Forced air/gas pering 3 x 1 h at 560°C (1040°F).
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