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公开(公告)号:US09187797B2
公开(公告)日:2015-11-17
申请号:US13823644
申请日:2012-05-25
申请人: Shinya Teramoto , Hiromasa Takada , Manabu Kubota , Yoichi Taniguchi , Junichi Nakatsuka , Kazuhiro Fujimura , Satoshi Koganemaru
发明人: Shinya Teramoto , Hiromasa Takada , Manabu Kubota , Yoichi Taniguchi , Junichi Nakatsuka , Kazuhiro Fujimura , Satoshi Koganemaru
IPC分类号: C21D8/00 , C22C38/00 , B21J1/00 , C21D6/00 , C21D1/20 , C22C38/02 , C22C38/06 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/38 , C22C38/60
CPC分类号: C21D8/005 , B21J1/003 , C21D1/20 , C21D6/00 , C21D2211/002 , C21D2211/004 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/06 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/38 , C22C38/60
摘要: The present invention provides a steel part for machine structural use whose fatigue strength and toughness are improved and a manufacturing method thereof. A steel part made of a steel containing, in mass %, C: 0.05 to 0.20%, Si: 0.10 to 1.00%, Mn: 0.75 to 3.00%, P: 0.001 to 0.050%, S: 0.001 to 0.200%, V: exceeding 0.20 to 0.25%, Cr: 0.01 to 1.00%, Al: 0.001 to 0.500%, and N: 0.0080 to 0.0200%, and a balance being composed of Fe and inevitable impurities, in which a steel structure contains a bainite structure having an area ratio of 95% or more, a bainite lath width is 5 μm or less, V carbide having an average grain diameter of not less than 4 nm nor more than 7 nm dispersedly exists in the bainite structure, and an area ratio of V carbide in the bainite structure is 0.18% or more.
摘要翻译: 本发明提供了一种改善疲劳强度和韧性的机械结构用钢部件及其制造方法。 钢的钢部件以质量%计含有C:0.05〜0.20%,Si:0.10〜1.00%,Mn:0.75〜3.00%,P:0.001〜0.050%,S:0.001〜0.200%,V: 超过0.20〜0.25%,Cr:0.01〜1.00%,Al:0.001〜0.500%,N:0.0080〜0.0200%,余量由Fe和不可避免的杂质组成,其中钢结构体含有贝氏体结构, 贝氏体板条宽度为5μm以下,平均粒径为4nm以上且7nm以下的V碳化物分散存在于贝氏体组织中,V碳化物的面积比为95% 在贝氏体结构中为0.18%以上。
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2.
公开(公告)号:US20130186529A1
公开(公告)日:2013-07-25
申请号:US13823644
申请日:2012-05-25
申请人: Shinya Teramoto , Hiromasa Takada , Manabu Kubota , Yoichi Taniguchi , Junichi Nakatsuka , Kazuhiro Fujimura , Satoshi Koganemaru
发明人: Shinya Teramoto , Hiromasa Takada , Manabu Kubota , Yoichi Taniguchi , Junichi Nakatsuka , Kazuhiro Fujimura , Satoshi Koganemaru
CPC分类号: C21D8/005 , B21J1/003 , C21D1/20 , C21D6/00 , C21D2211/002 , C21D2211/004 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/06 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/38 , C22C38/60
摘要: The present invention provides a steel part for machine structural use whose fatigue strength and toughness are improved and a manufacturing method thereof. A steel part made of a steel containing, in mass %, C: 0.05 to 0.20%, Si: 0.10 to 1.00%, Mn: 0.75 to 3.00%, P: 0.001 to 0.050%, S: 0.001 to 0.200%, V: exceeding 0.20 to 0.25%, Cr: 0.01 to 1.00%, Al: 0.001 to 0.500%, and N: 0.0080 to 0.0200%, and a balance being composed of Fe and inevitable impurities, in which a steel structure contains a bainite structure having an area ratio of 95% or more, a bainite lath width is 5 μm or less, V carbide having an average grain diameter of not less than 4 nm nor more than 7 nm dispersedly exists in the bainite structure, and an area ratio of V carbide in the bainite structure is 0.18% or more.
摘要翻译: 本发明提供了一种改善疲劳强度和韧性的机械结构用钢部件及其制造方法。 钢的钢部件以质量%计含有C:0.05〜0.20%,Si:0.10〜1.00%,Mn:0.75〜3.00%,P:0.001〜0.050%,S:0.001〜0.200%,V: 超过0.20〜0.25%,Cr:0.01〜1.00%,Al:0.001〜0.500%,N:0.0080〜0.0200%,余量由Fe和不可避免的杂质组成,其中钢结构体含有贝氏体结构, 贝氏体板条宽度为5μm以下,平均粒径为4nm以上且7nm以下的V碳化物分散存在于贝氏体组织中,V碳化物的面积比为95% 在贝氏体结构中为0.18%以上。
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