The precipitation hardening type martensitic type stainless steel cast steel and its production method of being superior in machinability

摘要

With mass standard, 0.08 - 0.18% C, Si of 1.5% or less, Mn, 0.005 - 0.4% S, 13.5 - 16.5% Cr, 3.0 - 5.5% Ni, 0.5 - 2.8% Cu, 1.0 - 2.0% Nb of 2.0% or less, and N of 0.12% or less are contained, at the same time C, the content of N and Nb the 0.2 9 (C%+0.86N%) satisfies the condition of Nb% 1.0, the constitution where the remainder consists of Fe and the inevitable impurity possesses, in the base where the tempering martensite is designated as subject mean diameter the precipitation hardening type martensitic system which possesses the organization which the Cu deposit of 0.1 - 0.4 millimicrons dispersesStainless steel cast steel.