| 发明名称 | Hot-dip Al—Zn coated steel sheet | ||
| 摘要 | There is provided a hot-dip Al—Zn coated steel sheet that has a steel sheet containing Si and Mn as a base steel sheet and has excellent coating appearance and corrosion resistance. The Al—Zn coating layer has an Al content in the range of 20% to 95% by mass. The Al—Zn coating layer has a Ca content in the range of 0.01% to 10% by mass. Alternatively, the Ca and Mg content is in the range of 0.01% to 10% by mass. A steel sheet surface layer within 100 μm from a surface of the base steel sheet directly under the Al—Zn coating layer contains less than 0.060 g/m2 per surface of an oxide of at least one selected from Fe, Si, Mn, Al, P, B, Nb, Ti, Cr, Mo, Cu, and Ni in total. | ||
| 申请公布号 | US9234267(B2) | 申请公布日期 | 2016.01.12 |
| 申请号 | US201113989515 | 申请日期 | 2011.11.25 |
| 申请人 | JFE Steel Corporation | 发明人 | Yoshida Masahiro;Nakamaru Hiroki |
| 分类号 | C23C2/02;C23C2/06;C23C2/12;B32B15/01 | 主分类号 | C23C2/02 |
| 代理机构 | RatnerPrestia | 代理人 | RatnerPrestia |
| 主权项 | 1. A hot-dip Al—Zn coated steel sheet that includes an Al—Zn coating layer having an Al content in the range of 20% to 95% by mass on a surface of the steel sheet, wherein the Al—Zn coating layer contains 0.01% to 10% by mass of Ca, the coating layer having equal parts in a thickness direction with one part nearer an outer surface of the coating layer and one part nearer the steel sheet, wherein the Ca is present in a greater amount in the part of the coating layer nearer the outer surface of the coating layer, and wherein a steel sheet surface layer within 100 μm from a surface of the base steel sheet directly under the Al—Zn coating layer contains less than 0.060 g/m2 per surface of an oxide of at least one selected from Fe, Si, Mn, Al, P, B, Nb, Ti, Cr, Mo, Cu, and Ni in total. | ||
| 地址 | Tokyo JP | ||