| 发明名称 |
Chisels |
| 摘要 |
A chisel includes an elongate shank portion composed of a first steel, and a working end portion composed of a second steel that is different than the first steel. The working end portion is joined to the shank and configured to chisel a workpiece. The joined shank portion and working end portion has been heat treated to cause the first steel of the shank portion to adopt a first microstructure comprising bainite, the second steel of the working end portion to adopt a second microstructure comprising martensite, and the working end portion to have a greater hardness than the shank portion. |
| 申请公布号 |
US9333635(B2) |
申请公布日期 |
2016.05.10 |
| 申请号 |
US201414566867 |
申请日期 |
2014.12.11 |
| 申请人 |
BLACK & DECKER INC. |
发明人 |
Quinn Thomas J.;Johnson David N.;Probst Florian |
| 分类号 |
B25D17/02;E21C35/18;C21D1/613;C21D9/50;C22C38/18;B23K31/02;B23K37/00;B28D1/26;C21D6/00;C21D9/22;C22C38/00;C22C38/02;C22C38/04;C22C38/22;C22C38/24;C22C38/44 |
主分类号 |
B25D17/02 |
| 代理机构 |
|
代理人 |
Markow Scott B. |
| 主权项 |
1. A chisel comprising:
an elongate shank portion composed of a first steel, and a working end portion joined to the shank portion to form a joined shank portion and working end portion and configured to chisel a workpiece, the working end portion composed of a second steel that is different than the first steel, wherein the joined shank portion and working end portion have been heat treated to cause the first steel of the shank portion to adopt a first microstructure comprising bainite, the second steel of the working end portion to adopt a second microstructure comprising martensite, and the working end portion to have a greater hardness than the shank portion. |
| 地址 |
New Britain CT US |
