Engineering, 19.03.2020 05:23 mheiser8768

(a) Explain why a stainless steel containing 18wt % Cr is magnetic and is often used for knife blades, while a stainless steel containing 18 wt % Cr and 8 wt% Ni is not magnetic and is often used for stainless steel parts that need to be forged. (Pure Ni has an f. c.c. structure.)(b)Mo, W, and V all readily form small stable carbides. Explain why these elements can be used to produce tool steels thatretain their hardness at temperatures well above the temperature at which martensite would become over-tempered.(c)* A teaspoon is made of a single piece of stainless steel containing nickel. It is observed that the bowl of the spoon is not magnetic, but the handle is. Assume that all parts of the spoon are always at the same temperature, and that plastic deformation is used to form both the bowl and the handle. Explain the difference in properties(why is the crystal structure different).

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(a) Explain why a stainless steel containing 18wt % Cr is magnetic and is often used for knife blade...

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