发明授权
- 专利标题： High-strength and high-ductility die-quenched parts and method of manufacturing the same
- 专利标题（中）： 高强度高延性模具淬火件及其制造方法
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申请号： US13375156申请日： 2010-05-26
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公开(公告)号： US08932416B2公开(公告)日： 2015-01-13
- 发明人: Eizaburou Nakanishi , Masayuki Miyake , Kotobu Nagai , Masao Hayakawa , Takehito Itagaki , Takahiko Kanai , Munehisa Hatta , Kazuhiro Kawasaki
- 申请人： Eizaburou Nakanishi , Masayuki Miyake , Kotobu Nagai , Masao Hayakawa , Takehito Itagaki , Takahiko Kanai , Munehisa Hatta , Kazuhiro Kawasaki
- 申请人地址： JP Yokohama-shi JP Ibaraki JP Tokyo
- 专利权人： Nissan Motor Co., Ltd.,National Institute for Materials Science,Neturen Co., Ltd
- 当前专利权人： Nissan Motor Co., Ltd.,National Institute for Materials Science,Neturen Co., Ltd
- 当前专利权人地址： JP Yokohama-shi JP Ibaraki JP Tokyo
- 代理机构： Westerman, Hattori, Daniels & Adrian, LLP
- 优先权： JP2009-131469 20090529
- 国际申请： PCT/JP2010/058915 WO 20100526
- 国际公布： WO2010/137619 WO 20101202
- 主分类号： C21D9/00
- IPC分类号： C21D9/00 ; B21D22/02 ; B21D22/20 ; B21D37/16 ; C21D1/42 ; C22C38/18 ; C22C38/22
摘要：
A high-strength die-quenched part 1 is formed by heating a high-strength steel sheet 11 up to an austenite region, hot stamping and cooling inside a mold, and its microstructure has the martensite wherein carbide particles 2 are finely dispersed over an entire region including prior-austenite grain boundaries. It is desirable that the prior-austenite grain size in the microstructure of the high-strength steel sheet, which is a base material, be 10 μm or smaller. The high-strength die-quenched part has high-strength and high-ductility thanks to its martensite.