Question

Multiple choice

The iron carbide (Fe ₃C) phase in steel that is hard and brittle is known as: Austenite, ferrite, cementite, martensite

-------is a shape produced by solidification of a liquid metal (material) in a mold. cupola, drag, casting, forming

------- is a phase in steel composed of alternating layers of cementite and ferrite. pearlite, lattice, Fe₃C, martensite

Steel is an alloy of carbon and iron with limits on the amounts of carbon to be approximately: more than 1%, less than 1%, more than 2%, less than 2%, less than 6%

Which is not a requirement for age hardening (precipitation hardening) of an alloy? The alloy must be quenchable, It must form a coherent precipitate with the matrix,The matrix should be relatively hard and brittle and the precipitate should be soft and ductile, the alloy must be able to dissolve precipitates in a solid solution (i.e. decreasing solid solubility with decreasing temperature

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Answer 1

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④ © O Cementite Casting Fec Less than 21. The matrix should be relatively hard and brittle and the precipitate should be coff to ductile. (This is not the requirement?