Sub zero treatment of steel is done to (A) Suppress martensite transformation (B) Enhance its working performance in sub zero atmosphere (C) Reduce the retained austenite in hardened steel (D) Induce temper brittleness after its hardening

Sub zero treatment of steel is done to
(A) Suppress martensite transformation
(B) Enhance its working performance in sub zero atmosphere
(C) Reduce the retained austenite in hardened steel
(D) Induce temper brittleness after its hardening
by

1 Answer

Answer :

Option C
by

Related questions

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Secondary hardening in steels arises out of the (A) Precipitation of fine alloy carbides at high temperatures (B) Refinement of ferrite grain size by working (C) Decomposition of retained austenite upon heat treatment (D) Precipitation of complex inter-metallic upon heat treatment

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