发明名称 |
PROCESS FOR MANUFACTURING SHAPED ARTICLE |
摘要 |
The present invention provides a method for manufacturing formed article, which can inhibit damage and debonding of a coating layer at preforming and which can improve surface quality of the formed article when preforming a base material of a galvannealed steel sheet and then quenching the preform to produce a formed article. A method for manufacturing formed article comprising: a first step comprising: feeding into a first die a galvannealed steel sheet, as a material, which has a coating layer containing: 8-25 mass % of Fe, and a remnant containing Zn, Al, and impurity; and then preforming the galvannealed steel sheet such that material temperature just before preforming of the first step being within the range of 41-700 degree C, to obtain a preform; a second step of heating the preform at a temperature of A 1 transformation point or more; and a third step of quenching the heated preform from the temperature of A 1 transformation point or more to obtain a formed article. |
申请公布号 |
EP2159292(A4) |
申请公布日期 |
2016.08.31 |
申请号 |
EP20080777244 |
申请日期 |
2008.06.16 |
申请人 |
NIPPON STEEL & SUMITOMO METAL CORPORATION |
发明人 |
NAKAMURA, TOYOMITSU;NAKATA, MASAHIRO;TAKEBAYASHI, HIROSHI;TOKI, TAMOTSU;KOJIMA, NOBUSATO |
分类号 |
C21D9/00;B21D22/02;B21D22/20;B21D22/26;C21D1/18;C21D1/673;C21D9/46;C22C18/00;C22C38/00;C22C38/02;C22C38/04;C22C38/06;C22C38/22;C22C38/28;C22C38/32;C22C38/38;C22C38/58;C23C2/06;C23C2/26 |
主分类号 |
C21D9/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|