| 发明名称 |
STEEL PART AND METHOD OF MANUFACTURING THE SAME |
| 摘要 |
A surface of a steel material cut to a desired shape and carbonitrided is heated by excitation and thereafter repeatedly heated/cooled a predetermined number of times, such that an ultrafine crystal layer is formed immediately under the surface of the steel material and at least a predetermined number of cracks are formed under the formed ultrafine crystal layer, thereby enabling to increase toughness of the surface or immediately thereunder and enhance tenacity and inhibiting growth of cracks. |
| 申请公布号 |
US2017016083(A1) |
申请公布日期 |
2017.01.19 |
| 申请号 |
US201515124453 |
申请日期 |
2015.03.11 |
| 申请人 |
HONDA MOTOR CO., LTD. |
发明人 |
Matsumoto Kenji |
| 分类号 |
C21D9/32;C23C8/80;C21D1/06;C23C8/32;C21D7/06 |
主分类号 |
C21D9/32 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A steel part, comprising:
a steel material cut to a desired shape and carbonitrided, whose surface is then repeatedly heated by excitation and cooled a predetermined number of times, such that an ultrafine crystal layer is formed immediately under the surface of the steel material and at least a predetermined number of cracks are formed under the formed ultrafine crystal layer. |
| 地址 |
Tokyo JP |
