公开(公告)号：EP4421200A1

公开(公告)日：2024-08-28

申请号：EP22951910.3

申请日：2022-07-19

申请人： NIPPON STEEL Stainless Steel Corporation ,  Nippon Seisen Co., Ltd.

发明人： TAKANO, Kohji ,  SAKAI, Hiroki ,  AKIURA, Tsuneo ,  AKIZUKI,Takayuki

IPC分类号： C22C38/00 ,  C22C38/58 ,  C21D8/06 ,  C21D9/02

CPC分类号： Y02P10/20 ,  B21F3/02 ,  C21D8/06 ,  C21D9/02 ,  C22C38/00 ,  C22C38/06 ,  C22C38/34 ,  C22C38/02 ,  C22C38/04 ,  C22C38/58 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  F16F1/04

摘要： A high-strength stainless-steel wire containing C, Si, Mn, P, S, Ni, Cr, N, Al, O, Ca, a total of Ti, Nb, Ta, and W of 0.50% or less, the balance of Fe and impurities, in which the value of Md30 represented by (1) is 0 to 30 (°C), a strength of the steel wire is 1,800 MPa or more, a deformation-induced martensite amount is 20 to 80 vol.%, and a tensile residual stress of a surface layer of the steel wire in a longitudinal direction is 500 MPa or less. Md30 (°C) = 551 - 462 (C + N) - 9.2Si - 8.1Mn - 29(Ni + Cu) - 13.7Cr - 18.5Mo ...(1) Here, an element symbol in Equation (1) is the (mass%) of each element in a chemical composition of a steel, and D is substituted in a case where the element is not contained.