Patent ID: 6537397
Filing Date: 2003-03-25
Classification: C21D,C22C

Abstract:
A heat treatment process for producing an Fe-based member, consisting essentially of:a first step of subjecting an Fe-based material comprising 0.6% by weight&lE;carbon (C)&lE;1.9% by weight silicon (Si)<2.2% by weight 0.9% by weight&lE;manganese (Mn)&lE;1.7% by weight 0.5% by weight&lE;nickel (Ni)&lE;1.5% by weight and the balance of iron (Fe) including inevitable impurities, to a thermal treatment at a heating temperature T1 set in a range of TS1L, wherein TS represents a solidus temperature for the Fe-based material and TL represents a liquidus temperature, and under a cooling condition set at a quenching level, and a second step of subjecting the resulting Fe-based material to a thermal treatment at a heating temperature T2 set in a range of Te1