STEEL SHEET FOR SOFT NITRIDING AND PROCESS FOR PRODUCING SAME

摘要

Provided is a steel sheet for soft nitriding which is excellent in terms of formability and fatigue resistance. The steel sheet for soft nitriding has a composition which contains, in terms of mass%, 0.05-0.10% C, up to 0.5% Si, 0.7-1.5% Mn, up to 0.05% P, up to 0.01% S, 0.01-0.06% Al, 0.5-1.5% Cr, 0.03-0.30% V, and up to 0.005% N and in which the ratio of the amount of V present as solid solution to the V content [(solid-solution V amount)/(V content)] exceeds 0.50, with the remainder comprising Fe and unavoidable impurities. The steel sheet has a composite structure which comprises ferrite and pearlite.