G cu al hot ad metal fabricajon methods forming

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Unformatted text preview: 14.2, Callister & Rethwisch 3e. • Extrusion (e.g rods, tubing) (e.g rods, wire, tubing) die roll Ao tensile force Die must be well lubricated & clean force container ram billet container die holder extrusion die DucJle metals, e.g. Cu, Al (hot) Ad Metal FabricaJon Methods FORMING CASTING MISCELLANEOUS CASTING - mold is filled with molten metal –  metal is melted in a furnace, perhaps alloying elements added, then cast in a mold –  common and inexpensive –  gives good producJon of shapes –  weaker products, internal defects –  good opJon for briOle materials Metal FabricaJon Methods FORMING CASTING MISCELLANEOUS Example: Sand Casting (large parts, e.g. auto engine blocks) Sand Sand molten metal •  What material will withstand T >1600ºC and is inexpensive and easy to mold? •  Answer: sand!!! •  To create mold, pack sand around form (pattern) of desired shape hOp://www.youtube.com/watch?v=rgL2Jn5mk1A Metal FabricaJon Methods FORMING CASTING Example: Die [email protected] - - high volume - - for alloys having low melJng temperatures MISCELLANEOUS Example: [email protected] [email protected] - - simple shapes (e.g., rectangular...
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