喷丸与振动光饰复合处理对GH4169高温合金疲劳性能的影响  

Effect of Shot Peening Combined Vibration Finishing on Fatigue Behavior of GH4169 Superalloy

作　　者：潘一帆 刘道新[2] 刘博 胡云辉[3] 王为 Pan Yifan;Liu Daoxin;Liu Bo;Hu Yunhui;Wang Wei(Luoyang Ship Material Research Institute,Luoyang 471000,China;Northwestern Polytechnical University,Xi’an 710072,China;Aero Engine Corporation of China Xi’an Aero-engine LTD,Xi’an 710038,China)

机构地区：[1]中国船舶集团有限公司第七二五研究所,河南洛阳471000 [2]西北工业大学,陕西西安710072 [3]中航工业西安航空发动机(集团)有限公司,陕西西安710038

出　　处：《稀有金属材料与工程》2022年第8期2955-2962,共8页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51771155)。

摘　　要：对比研究了喷丸和喷丸与振动光饰复合处理对GH4169高温合金疲劳性能的影响,利用扫描电子显微镜、粗糙度仪、显微硬度计、X射线应力测试仪分析和测试了试样的表面形貌、表层组织、粗糙度、显微硬度、残余应力场,探讨了表面完整性与疲劳性能的内在联系及作用机制。结果表明:复合处理对GH4169高温合金疲劳性能的改善效果比单独喷丸强化处理更好;复合处理使GH4169高温合金的室温疲劳强度提高了21.6%;500℃预加热100 h处理使复合强化GH4169高温合金疲劳强度降低了6%,但仍较未喷丸处理状态提高了14.29%,即复合处理能够有效改善GH4169高温合金室温~500℃高温工况下的抗疲劳性能。The effects of shot peening and shot peening combined vibration finishing on the fatigue properties of GH4169 superalloy were studied contrastively. The surface morphology, surface structure, roughness, microhardness and residual stress field of the sample were analyzed by scanning electron microscope, roughness profiler, microhardness tester, and X-ray stress tester, and the internal relationship and mechanism of surface integrity and fatigue performance were discussed. The results show that the composite treatment is better than single shot peening treatment in improving the fatigue performance of GH4169 superalloy. The composite treatment increases the room temperature fatigue strength of GH4169 superalloy by 21.6%. Preheating at 500 ℃ for 100 h reduces the fatigue strength of composite strengthened GH4169 superalloy by 6%, but it is still 14.29% higher than that of the base material. That is to say, the composite treatment can effectively improve the fatigue resistance of GH4169 superalloy under working conditions from room temperature to 500 ℃.

关 键 词：GH4169高温合金 喷丸 振动光饰 表面完整性 疲劳 

分 类 号：TG146.15[一般工业技术—材料科学与工程]