喷丸工艺对17CrNi2Mo钢喷丸层残余应力分布及残余奥氏体含量的影响
Effects of Shot Peening Processes on Residual Stress Distribution and Retained Austenite Content in Shot-peened Layer of 17CrNi2Mo Steel
摘 要
采用不同的喷丸工艺对渗碳淬火17CrNi2Mo钢进行表面强化处理,研究了喷丸工艺对喷丸层残余应力分布及残余奥氏体含量的影响.结果表明:喷丸能在17CrNi2Mo钢表层产生残余压应力,且残余压应力随层深增加而先增加后减小;增大喷丸强度,喷丸层的表面残余压应力、最大残余压应力及其影响层深均增大;增加喷丸次数可增大表面残余压应力和最大残余压应力;喷丸能降低喷丸层的残余奥氏体含量,喷丸强度或喷丸次数越大,残余奥氏体含量越低;残余奥氏体含量随层深增大而增加.
喷丸
残余应力
残余奥氏体
17CrNi2Mo steel
shot peening
residual stress
retained austenite
Abstract
The surface strengthening treatment of 17CrNi2Mo steel was conducted using different shot peening (SP) processes,and the effects of SP on the residual stress distribution and the content of retained austenite in shot-peened layer were studied.The result show that SP produced the compressive residual stress (CRS) on the surface of 17CrNi2Mo steel,and CRS increased first,then decreased with the increase of depth.Increasing SP intensities,surface CRS,maximum CRS and influencing depth all increased.Moreover,the increases of SP numbers were beneficial to the improvement of surface CRS and maximum CRS.The retained austenite content decreased after SP,the higher SP intensities and numbers,the smaller austenite contents.Austenite contents decreased with the increase of depth.
中图分类号 TG115.22 DOI 10.11973/jxgccl201507004
所属栏目 试验研究
基金项目
收稿日期 2015/1/7
修改稿日期 2015/6/12
网络出版日期
作者单位点击查看
备注刘焕秀(1983-),女,山东临沂人,工程师,硕士研究生.
引用该论文: LIU Huan-xiu,FU Peng,JIANG Chuan-hai. Effects of Shot Peening Processes on Residual Stress Distribution and Retained Austenite Content in Shot-peened Layer of 17CrNi2Mo Steel[J]. Materials for mechancial engineering, 2015, 39(7): 22～24
刘焕秀,付鹏,姜传海. 喷丸工艺对17CrNi2Mo钢喷丸层残余应力分布及残余奥氏体含量的影响[J]. 机械工程材料, 2015, 39(7): 22～24
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参考文献
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【3】李麒.渗碳齿轮代表性试样心部硬度的研究[J].现代冶金,2012,40(4):26-28.
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【5】FU P,ZHAN K,JIANG C H.Micro-structure and surface layer properties of 18CrNiMo7-6 steel after multistep shot peening[J].Mater Design,2013,51:309-314.
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【8】李鹏,刘道新,关艳英,等.喷丸强化对新型7055-T7751铝合金疲劳性能的影响[J].机械工程材料,2015,39(1):86-89.
【9】WOHLFAHRT H.The influence of peening conditions on the resulting distribution of residual stress[C]//Proceeding of the Second International Conference on Shot Peeing.Chicago:American Shot Peening Society,1984:316-331.
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