Transcription of CHAPTER 11: METAL ALLOYS APPLICATIONS AND PROCESSING
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CHAPTER 11: METAL ALLOYS APPLICATIONS AND PROCESSING
ISSUES TO How are METAL ALLOYS classified and how are they used? What are some of the common fabrication techniques? How do properties vary throughout a piece of material that has been quenched, for example? How can properties be modified by post heat treatment? CHAPTER 11: METAL ALLOYS APPLICATIONS AND PROCESSING Classifications of METAL ALLOYS Fe 3 C cementite METAL ALLOYS Steels Ferrous Nonferrous Cast Irons Cu Al Mg Ti < wt%C 1600 1400 1200 1000 800 6 00 4 00 0 1 2 3 4 5 6 L g austenite g +L g +Fe 3 C a ferrite a +Fe 3 C L+Fe 3 C d (Fe) Carbon concentration, C Eutectic Eutectoid 727 C 1148 C T( C) Steels < Cast Irons tic Ferrous ALLOYS : iron is the prime constituent Ferrous ALLOYS are relatively inexpensive and extremely versatile Thus these ALLOYS are wide spread engineering
plaster die formed around wax prototype CASTING • Sand Casting (large parts, e.g., auto engine blocks) • Investment Casting (low volume, complex shapes e.g., jewelry, turbine blades) • Die Casting (high volume, low T alloys) • Continuous Casting (simple slab shapes) METAL FABRICATION METHODS-II
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