发明申请
- 专利标题: MANUFACTURING METHOD OF HIGH-STRENGTH AND HIGH-TOUGHNESS THIN STEEL AND HEAT TREATMENT APPARATUS
- 专利标题(中): 高强度和高韧性钢和热处理设备的制造方法
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申请号: US13202991申请日: 2010-02-22
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公开(公告)号: US20120042994A1公开(公告)日: 2012-02-23
- 发明人: Etsunori Fujita , Yumi Ogura , Seiji Kawasaki , Shigeyuki Kojima , Soichi Makita , Shigeru Maeda , Hideyuki Yamane , Seiya Yoshida
- 申请人: Etsunori Fujita , Yumi Ogura , Seiji Kawasaki , Shigeyuki Kojima , Soichi Makita , Shigeru Maeda , Hideyuki Yamane , Seiya Yoshida
- 申请人地址: JP Hiroshima-shi
- 专利权人: Delta Tooling Co., Ltd.
- 当前专利权人: Delta Tooling Co., Ltd.
- 当前专利权人地址: JP Hiroshima-shi
- 优先权: JP2009-041571 20090224
- 国际申请: PCT/JP10/52651 WO 20100222
- 主分类号: C21D1/42
- IPC分类号: C21D1/42 ; C21D1/62 ; C21D9/08 ; C21D6/00 ; C21D1/38
摘要:
To provide a technique suitable for elevating strength and toughness of a thin low-carbon steel. By performing rapid heating and rapid cooling to a thin low-carbon steel which is an ordinary steel with a thickness of 1.2 mm or less, a steel where a microstructure becomes a duplex grain size structure mixed with crystal grains having different grain diameters, which is not homogeneous, preferably, hard phase structures are contained in addition to the duplex grain size structure is obtained, and a high-strength and high-toughness thin low-carbon steel is obtained. Further, by performing a heat treatment process involving rapid heating and rapid cooling multiple times, a duplex grain size structure of crystal grains with smaller grain diameters or a hard phase structure contained therein is obtained, so that a thin low-carbon steel with higher strength and higher toughness is obtained.