| 发明名称 |
HOT ROLLED STEEL SHEET EXCELLENT IN SURFACE PROPERTY AND ITS PRODUCING METHOD |
| 摘要 |
PROBLEM TO BE SOLVED: To provide a hot rolled steel sheet from which a hot dip galvannealed steel sheet free from the defect of strippy patterns and a cold rolled steel sheet and an electroplated steel sheet free from the ridging are formed. SOLUTION: In the surface layer part within 50μm in the thickness direction from the surface of a hot rolled sheet, the ratio of ferritic grains having a crystal grain size of <=15μm is limited to <=70 area%.
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| 申请公布号 |
JP2001316763(A) |
申请公布日期 |
2001.11.16 |
| 申请号 |
JP20000133790 |
申请日期 |
2000.05.02 |
| 申请人 |
SUMITOMO METAL IND LTD |
发明人 |
NAKAGAWA HIROYUKI;KAWANISHI YOSHIHIRO;OSUGI YUKIO;NOMURA SHIGEKI |
| 分类号 |
C21D9/48;C22C38/00;C22C38/14;C22C38/16;(IPC1-7):C22C38/00 |
主分类号 |
C21D9/48 |
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