Composite Shot Peening of 17Cr2Ni2Mo Steel Surface
-
摘要: 对17Cr2Ni2Mo钢进行了单一钢丸和复合喷丸(钢丸、陶瓷丸)两种表面强化处理, 测试了喷丸强化后钢表面的残余应力、残余奥氏体含量和显微硬度沿层深的分布, 并进行了表面喷丸强化参数的优化。结果表明: 复合喷丸强化使钢表面产生的残余应力和最大残余应力均高于单一钢丸强化的; 且使钢发生残余奥氏体转变成马氏体的最大深度也明显大于单一钢丸强化的; 复合喷丸强化后钢的表面硬度高于单一钢丸强化的; 复合喷丸能够得到比单一钢丸更好的强化效果。Abstract: The 17Cr2Ni2Mo steel specimens were surface strengthened by single steel shot peening and composite shot peening with steel shot and ceramic shot. The residual stress, residual austenite content and micro hardness distribution along the depth direction on the surface of the steel after shot peening strengthening were tested. And the surface shot peening strengthening parameters were optimized. The results show that the steel after composite shot peening had higher surface residual stress and maximum residual stress than those after single shot peening. The former had deeper maximum depth in which the residual austenite transformed to martensite than the latter. And the former had higher surface hardness and better strengthening effect than the latter.
-
Keywords:
- shot peening /
- residual stress /
- composite shot peening /
- micro hardness
-
-
[1] SHIGERU H,KIYOKAZU S. Studies on improvement of surface durability of carbonitrided and hardened gear steel[J]. Journal of the Japan Society for Precision Engineering,2000,66(11):1766-1770. [2] 李家宝, 盖秀颖, 徐建辉.硬状态钢喷丸影响层组织强化的表征[J].材料研究学报,2003,17(2):214-219. [3] 刘凤智, 李家宝.几种不同原始硬度钢的喷丸强化行为与表征[J].石油化工高等学校学报, 2005,18(1):51-54. [4] 王冰, 徐民稣, 张玉河.关于影响残余奥氏体残余应力的研究[J].国外金属热处理, 2002,32(6):17-20,22. [5] ALFAIATE J, ALIABADI M H, GUAGLIANO M, et al. Improvement of fatigue strength of maraging steel by shot peening[J].Key Engineering Materials,2007,348/349:537-540. [6] 黄元林, 朱有利, 李占明.喷丸强化对18Cr2Ni4WA渗碳钢性能的影响[J].装甲兵工程学院学报,2009(5):90-92. [7] HIDEKI O, AKIRA T, KOTOJI A. Relationship among specimen's hardness, residual stress distribution and yield stress on the difference of shot peening methods[J]. Journal of High Pressure Institute of Japan,2003,41(5):233-242.
计量
- 文章访问数: 3
- HTML全文浏览量: 0
- PDF下载量: 0
下载:
