摘要
提出了1Cr11Ni2W2MoV不锈钢激光冲击强化(LSP)后渗铝提高材料疲劳性能的工艺方法,采用振动疲劳试验方法研究了激光冲击强化后渗铝处理对材料疲劳性能的影响,并与激光冲击强化、渗铝状态进行了对比分析,实验结果表明,激光冲击强化后渗铝工艺方法显著提高材料的疲劳寿命。采用X射线衍射(XRD)、透射电子显微镜(TEM)和扫描电子显微镜(SEM)分析研究了激光冲击强化后渗铝对材料微观组织的影响,讨论了这种工艺方法对材料性能提高的机理。结果表明,激光冲击强化后渗铝工艺增加了渗铝层厚度,但不影响其渗铝层的性能,同时使1Cr11Ni2W2MoV不锈钢基体表面晶粒呈梯度分布,从而提高了试样疲劳寿命。
A new technology,aluminizing after laser shock processing（LSP）,for improving the fatigue performance of 1Cr11Ni2W2MoV-steel is advanced.The fatigue lives of samples are measured by the vibration fatigue experiment.These experimental tests show that the fatigue lives of aluminizing after LSP are greatly improved.The microstructures are examined by means of X-ray diffractometry（XRD）,transmission electron microscopy（TEM） and scanning electron microscopy（SEM）.The mechanism of fatigue life improvement is also discussed.Experimental results show that the thickness of aluminizing layer is found to increase because of this new technology,and the surface crystal of 1Cr11Ni2W2MoV-steel is distributed in a gradient manner.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2011年第7期126-130,共5页
Chinese Journal of Lasers
基金
国防预研基金(5132701)资助课题
