CCSJ3.4 Demonstrate and apply an understanding of metallurgy to your jewellery or silversmithing work Overview This unit covers the skills and knowledge required to demonstrate and apply a good knowledge of metallurgy to the work that you are undertaking. You will be expected to select and prepare the materials and apply specialist techniques to your work. CCSJ3.4 Demonstrate and apply an understanding of metallurgy to your jewellery or silversmithing work 1 CCSJ3.4 Demonstrate and apply an understanding of metallurgy to your jewellery or silversmithing work Performance criteria You must be able to: P1 describe the microstructural changes during solidification, cold working and annealing P2 carry out identification of precious metal alloys P3 calculate the amounts of precious metal alloys to make a specific alloy composition P4 describe the theory and demonstrate the practice of rolling, hammering, fluxing, soldering and polishing P5 identify porosity and take preventative action P6 identify common faults associated with lost wax investment casting CCSJ3.4 Demonstrate and apply an understanding of metallurgy to your jewellery or silversmithing work 2 CCSJ3.4 Demonstrate and apply an understanding of metallurgy to your jewellery or silversmithing work Knowledge and understanding You need to know and K1 terminology used by the industry understand: K2 the process of re-crystallization after melting and annealing K3 the physical and mechanical properties of cast and cold worked metal K4 the theory and of rolling, hammering, fluxing, soldering and polishing K5 the physical and mechanical properties of a range of metals K6 the differences in the physical properties of precious metals compared to their alloys K7 the differences in the mechanical properties of precious metals compared to their alloys K8 how to calculate precious metal alloys K9 re-crystallization after melting and annealing K10 the absorption and expulsion of gasses during the melting and annealing processes K11 the causes of contamination when melting and annealing metal K12 the expansion and contraction of metal during the annealing and quenching process K13 the theory and practice of rolling, hammering, fluxing, soldering and polishing K14 the theory and practice of carrying out pickling safely and effectively K15 the causes and prevention of porosity particularly in lost wax investment casting K16 the consequences of not initiating corrective action when porosity is identified K17 hazards and risks pertaining to the metallurgical process as it impacts on the jewellery manufacture K18 how precious metal alloys are stamped according to assay requirements K19 the consequences of incorrect identification and calculation of precious metal alloys CCSJ3.4 Demonstrate and apply an understanding of metallurgy to your jewellery or silversmithing work 3 CCSJ3.4 Demonstrate and apply an understanding of metallurgy to your jewellery or silversmithing work Developed by Creative and Cultural Skills Version number 1 Date approved April 2010 Indicative review April 2012 date Validity Current Status Original Originating Creative and Cultural Skills organisation Original URN J3.4 Relevant Science and mathematics; Engineering and manufacturing technology; Crafts, occupations creative arts and design; Science and Engineering Technicians; Artistic and Literary Occupations; Metal Forming, Welding and Related Trade Suite Jewellery Manufacture, Silversmithing and Allied Trades Key words jewellery, silversmithing, silverware, metallurgy CCSJ3.4 Demonstrate and apply an understanding of metallurgy to your jewellery or silversmithing work 4 .