高延性ダイクエンチによる高強度成形品及びその製造方法,申请号JP20090131469-传众专利搜索

高延性ダイクエンチによる高強度成形品及びその製造方法

申请公布号：JP6010730(B2)

申请号：JP20090131469

申请日期：2009.05.29

申请公布日期：2016.10.19

申请人：

日産自動車株式会社;国立研究開発法人物質・材料研究機構;高周波熱錬株式会社

发明人：中西栄三郎;三宅昌幸;長井寿;早川正夫;板垣孟彦;金井隆彦;八田宗久;川嵜一博

分类号：C22C38/00;B21D22/20;C21D9/00;C22C38/34

主分类号：C22C38/00

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.