| 摘要:介绍了喷丸强化的机理，包括应力强化和组织强化。指出:用ALMEN试片测试喷丸强度存在不合理性，提出可采用有限元方法，针对弹丸速度和弹丸直径这两个关键参数，对具体的材料和具体的受力状态确定喷丸的工艺参数；并分析了喷丸工艺参数与残余应力场之间的关系。特别说明:在强化过程中由于组织强化，导致材料的屈服强度不断提高，在进行有限元残余应力计算时，应不断对屈服强度进行修正。 |
| 关键词: 曲轴 喷丸强化 工艺参数 残余应力 |
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| The Research on Shot Peening Technology for Crankshafts |
| Ge Ping,Dong Yunqing,Wang Weidong,Cheng Shichang |
| Shanghai Marine Diesel Engine Research Institute，Shanghai 201108 |
| Abstract:The mechanism of shot penning is introduced, including stress and structure strengthening. It is pointed out that using the ALMEN strip to test the strength of shot peening is not reasonable, and FEM is proposed. Aiming at the two key parameters, the speed and diameter of the shots, the processing parameters of shot peening could be determined according to the material and stress. Moreover, the relations between shot peening parameters and residual stress are analyzed. It is also emphasized that because of the structure strengthening during the strengthening process, the yield strength of the material is increased, therefore, during the FEM calculation of residual stress, the yield strength should be revised constantly. |
| Key words: crankshaft shot peening processing parameter residual stress |
