railway RRB JE (CBT I + CBT II) Mock Test 2024 Engineering Materials Science Heat Treatment Process Hardening
Normalising process is used in steels to achieve
1
improve ductility by transforming austenite to martensite
2
improve mechanical properties by transforming austenite to fine grain pearlite
3
increase hardness by transforming austenite to martensite
4
decrease hardness by transforming martensite to pearlite