STEEL FOR SURFACE HARDENING FOR MACHINE STRUCTURAL USE, AND STEEL COMPONENT FOR MACHINE STRUCTURAL USE AND PROCESS FOR PRODUCING SAME

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专利权人:

Nippon Steel & Sumitomo Metal Corporation

发明人:

YOSHIDA, Suguru

申请号：

EP20110835926

公开号：

EP2634279(B1)

申请日:

2011.08.02

申请国别(地区):

欧洲专利局

年份:

2017

代理人:

摘要：

A steel for surface hardening for machine structural use which is characterized by containing, in terms of mass%, 0.30-0.60% C, 0.02-2.0% Si, 0.35-1.5% Mn, 0.001-0.5% Al, 0.05-2.0% Cr, 0.001-1.0% Sn, 0.0001-0.021% S, 0.0030-0.0055% N, 0.01-2.0% Ni, 0.01-2.0% Cu, up to 0.030% P, and up to 0.005% O, with the remainder comprising Fe and incidental impurities, the contents of Sn, Cu, Ni, Mn, and S satisfying relationships (1) and (2). - 0.19 ‰¤ 0.12 × Sn + Cu - 0.1 × Ni ‰¤ 0.15 60 ‰¤ Mn / S ‰¤ 300

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