| 发明名称 |
Method and System for Enhancing Rivetability |
| 摘要 |
A joined sheet stack and a method and system for forming the stack are disclosed. The stack may include a steel sheet and a second sheet. The steel sheet may include a bulk portion having a first tensile strength and one or more fastener regions having a second tensile strength that is lower than the first tensile strength and a microstructure that includes tempered martensite. A fastener may extend through each fastener region joining the steel sheet to the second sheet. The method may include heat treating one or more regions of a steel sheet to form one or more fastener regions having a tensile strength that is lower than a bulk tensile strength of the steel sheet and a microstructure that includes tempered martensite. A fastener may then be inserted into the one or more fastener regions to join the steel sheet to a second sheet. |
| 申请公布号 |
US2017044637(A1) |
申请公布日期 |
2017.02.16 |
| 申请号 |
US201514822323 |
申请日期 |
2015.08.10 |
| 申请人 |
Ford Motor Company |
发明人 |
CAMPBELL Aindrea McKelvey;CHIRIAC Constantin;HUFF Garret Sankey;SOHMSHETTY Raj |
| 分类号 |
C21D9/46;B21J15/02;C22C21/00;C21D1/40;C21D9/00 |
主分类号 |
C21D9/46 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A sheet metal stack comprising:
a steel sheet including:
a bulk portion having a first tensile strength; andone or more fastener regions having a second tensile strength that is lower than the first tensile strength and a microstructure that includes tempered martensite; a second sheet; and a fastener extending through each fastener region joining the steel sheet to the second sheet. |
| 地址 |
Dearborn MI US |
