In case of carbonitriding,by diffusion of which elements the surface become harder of a metal
A) only carbon
B) carbon and nitrogen
C) only nitrogen
D) none of the above
Correct Answer:
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Q13: In nitriding process which of the following
Q14: one of the following is a step
Q15: One of the following metal alloy is
Q16: in case of flame hardening ,the heat
Q17: in flame hardening process,the metal surface after
Q19: Dislocation are stopped by a ……
A)nuceation
B)grain growth
C)grain
Q20: Finer grain size,higher will be the …
A)hardness
B)ductility
C)yield
Q21: Work hardening also called as
A)precipetation hardening
B)hardening
C)strain hardening
D)none
Q22: some materials can not be work hardened
Q23: In solid solution strengthening to ……the hardness
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