| 发明名称 |
METHOD OF HOT-SHAPING AND HARDENING A SHEET STEEL BLANK |
| 摘要 |
A sheet steel blank is heated to the austenite range and formed in a cooled tool pair that rapidly cools the formed product until the product's temperature drops somewhat below the temperature Ms for the start of the formation of martensite. The cooling is rapidly interrupted and the product's temperature is raised until it exceeds Ms and is maintained there until the material comes to contain more than 50% by volume bainite. The short time under the Ms temperature favours the formation of bainite and shortens the holding time. |
| 申请公布号 |
US2015090378(A1) |
申请公布日期 |
2015.04.02 |
| 申请号 |
US201213261782 |
申请日期 |
2012.07.04 |
| 申请人 |
Eriksson Katarina;Larsson Jan |
发明人 |
Eriksson Katarina;Larsson Jan |
| 分类号 |
C21D9/46;C22C38/04;C22C38/02;C21D8/02 |
主分类号 |
C21D9/46 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method of hot shaping and hardening a sheet steel blank by forming the blank, heated to the austenite range, in a tool pair that rapidly cools the formed product,
characterized in that the formed product is cooled until the product's temperature drops below the temperature for the start of the formation of martensite, Ms, and the product's temperature is then raised until it exceeds the temperature for the start of the formation of martensite and is maintained hot so that bainite is formed. |
| 地址 |
Lulea SE |
