发明名称 |
CASE-HARDENED STEEL ELEMENT AND METHOD OF ITS PRODUCTION |
摘要 |
FIELD: metallurgy.SUBSTANCE: invention relates to case-hardened steel element, to method of its production and case-hardening steel. Steel-hardened steel element is produced at special stages of case-hardening, cooling and quenching. Steel element contains the following components in wt %: C: 0.1-0.40; Si: 0.35-3.0; Mn: 0.1-3; P: 0.03 or less; S: 0.15 or less; Al: 0.05 or less; N: 0.03 or less; Cr: less than 0.2 and Mo: 0.1 or less; Fe and unavoidable impurities making the rest. Its surface layer has first ply with carbon concentration of 0.60-0.85 wt % and martensite structure wherein no oxide layer caused by Si presence exists at grains interface. Second ply has carbon concentration of 0.1-0.4 wt % and martensite structure. Third ply has carbon concentration of 0.1-0.4 wt % and has no martensite structure.EFFECT: higher strength and homogeneous structure.25 cl, 7 dwg, 2 tbl |
申请公布号 |
RU2518840(C2) |
申请公布日期 |
2014.06.10 |
申请号 |
RU20120134191 |
申请日期 |
2011.03.30 |
申请人 |
AISIN AV KO., LTD.;NIPPON STIL KORPOREJSHN |
发明人 |
OBAJASI,KODZI;TAGUTI,KEITA;KATO,SUSUMU;KOZAVA,SUDZI;KUBOTA,MANABU;ADATI,JUDZI;SATO,KHIROKADZU |
分类号 |
C22C38/02;C21D9/32;C23C8/64 |
主分类号 |
C22C38/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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