超声振动对退火态Cr4Mo4V轴承钢拉伸性能的影响  

Effect of Ultrasonic Vibration on Tensile Properties of Annealed Cr4Mo4V Bearing Steel

作　　者：栾振猛 赵嫚 茅健 张立强 刘钢 LUAN Zhenmeng;ZHAO Man;MAO Jian;ZHANG Liqiang;LIU Gang(School of Mechanical and Automotive Engineering,Shanghai University of Engineering Science,Shanghai 201620,China;Key Laboratory of Intelligent Manufacturing Technology for Large Complex Thin-Walled Parts of Aviation for Machinery Industry,Shanghai 201620,China;Chengdu Zhiyuan Advanced Manufacturing Technology Research Institute Co.,Ltd.,Chengdu 610511,China)

机构地区：[1]上海工程技术大学机械与汽车工程学院,上海201620 [2]机械工业航空大型复杂薄壁件智能制造技术重点实验室,上海201620 [3]成都智远先进制造技术研究院有限公司,成都610511

出　　处：《轴承》2024年第11期50-55,76,共7页Bearing

基　　金：国家自然科学基金青年基金资助项目(52205485);国家自然科学基金资助项目(52375503);上海浦江人才计划资助项目(20PJ1404700);上海工程技术大学青年科研团队培育计划资助项目(QNTD202112)。

摘　　要：为探究轴承钢在超声能场作用下的塑性变形机理,进行了不同超声振幅和拉伸速度的超声振动辅助拉伸试验并观察试样的断口形貌,结果表明:Cr4Mo4V轴承钢的塑性变形能力随声能密度的增加有提高的趋势;超声振幅为2.7~3.6μm时,Cr4Mo4V轴承钢拉伸屈服强度最大降低了10.4%,屈服应变最大减小了17.7%;超声卸载后能量因材料阻尼作用消散,Cr4Mo4V轴承钢出现了残余声硬化现象,试样的峰值应力增大;Cr4Mo4V轴承钢试样的断口为韧性断裂,超声振动条件下试样断口没有明显的颈缩,韧窝呈现扁平状且尺寸小而浅。超声能场降低了Cr4Mo4V轴承钢的加工变形抵抗力并提高了材料强度。To explore the plastic deformation mechanism of bearing steel under the action of ultrasonic energy fields,the ultrasonic vibration-assisted tensile tests with varying ultrasonic amplitudes and tensile speeds are conducted,and the fracture morphology of samples is observed.The results indicate that the plastic deformation ability of Cr4Mo4V bearing steel tends to increase with the rise in acoustic energy density;when the ultrasonic amplitude is between 2.7 and 3.6μm,the tensile yield strength of Cr4Mo4V bearing steel decreases by up to 10.4%,and the yield strain reduces by up to 17.7%;after ultrasonic unloading,the energy dissipates due to damping effect of materials,resulting in a residual acoustic hardening phenomenon where the peak stress of Cr4Mo4V bearing steel increases;the fracture of Cr4Mo4V bearing steel samples exhibits ductile fracture characteristics,under ultrasonic vibration conditions,the fracture shows no significant necking,with ductile dimples being flat,small and shallow.The ultrasonic energy fields reduce the machining deformation resistance of Cr4Mo4V bearing steel while improving its material strength.

关 键 词：滚动轴承 高温轴承钢 Cr4Mo4V 超声 振动 声能 塑性变形 断口 

分 类 号：TH133.33[机械工程—机械制造及自动化] TG54[金属学及工艺—金属切削加工及机床]