表面超声滚压处理对AISI304不锈钢疲劳性能的影响  

Effect of Surface Ultrasonic Rolling Processing on Fatigue Properties of AISI304 Austenite Stainless Steel

作　　者：张飞[1] 上官绪超 

机构地区：[1]江西理工大学机电工程学院,江西赣州341000

出　　处：《热加工工艺》2017年第16期136-140,共5页Hot Working Technology

基　　金：江西省教育厅资助项目(GJJ14424)

摘　　要：采用透射电镜、金相显微镜、便携式表面粗糙度测量仪、显微硬度测量仪和X射线衍射应力分析仪,研究了AISI304不锈钢传统车削加工和车削后SURP再处理的两种试样。分析了SURP试样表层特性的变化,通过旋转弯曲疲劳试验获取了两种试样的疲劳极限。结果表明:经SURP处理的试样粗糙度为0.19μm,传统车削试样的粗糙度为0.87μm,前者显微硬度在表层深度50μm处比后者提高了47%,残余压应力由-453 MPa提高到了-721 MPa,试样的疲劳极限由362 MPa提高到了434 MPa。Two kinds of specimens which were processed by traditional turning processing and SURP after turning were studied by TEM, metalloscope, contact pin type roughness meter, microhardness tester and X ray diffraction analyzer. The change of the characteristic of SURP specimens was analyzed. The fatigue limits of the two specimens were obtained by rotary bending fatigue test. The results show that the surface roughness of SURP specimen is 0.19 μm and the traditional turning specimen is 0.87 μm. At the surface depth of 50 μm, the microhardness of the former increases by 47% compared with the latter, and the residual compressive stress increases from-435 MPa to-721 MPa and the fatigue limit increases from 362 MPa to 434 MPa.

关 键 词：表面超声滚压 表面粗糙度 表层硬度 残余压应力 疲劳极限 

分 类 号：TG172[金属学及工艺—金属表面处理]