超声功率对连杆轴瓦Ni-Al_(2)O_(3)镀层耐磨性能的影响  

Influence of ultrasonic po Influence of ultrasonic power on wear resistance of Ni⁃wer on wear resistance of Ni⁃Al Al_(2)O_(3) coating of connecting rod bearing shell

作　　者：王斌[1] 徐律 张晓明 马春阳 WANG Bin;XU Lü;ZHANG Xiaoming;MA Chunyang(Wuxi Vocational Institute of Commerce,Wuxi 214153,China;Chery Automobile Co.Ltd.,Wuhu 241000,China;College of Engineering,Northeast Agricultural University,Harbin 150030,China)

机构地区：[1]无锡商业职业技术学院,江苏无锡214153 [2]奇瑞汽车股份有限公司,安徽芜湖241000 [3]东北农业大学工程学院,黑龙江哈尔滨150030

出　　处：《兵器材料科学与工程》2024年第1期76-82,共7页Ordnance Material Science and Engineering

基　　金：江苏省高等学校基础科学(自然科学)研究面上项目(22KJD460008)。

摘　　要：用超声-喷射电沉积方法研究了超声波功率对连杆轴瓦表面Ni-Al_(2)O_(3)镀层耐磨性的影响。用扫描电子显微镜(SEM)、能谱分析仪(EDS)、X射线衍射仪(XRD)、高分辨率电子显微镜(TEM)对Ni-Al_(2)O_(3)镀层的表面形貌、物相组成、组织结构进行分析,用摩擦磨损试验机及纳米显微硬度计对镀层的显微硬度及耐磨性能进行研究。结果表明:超声波功率通过空化效应及微射流作用搅拌镀液,可使Al_(2)O_(3)纳米粒子更好的悬浮在镀液中,从而影响镀层耐磨性。当超声波功率为200 W时,Ni-Al_(2)O_(3)镀层中Ni峰低且宽,镀层晶粒细小,结构致密,显微硬度达到639.2HV,摩擦因数和磨损质量损失分别为0.53和0.27 mg。涂覆Ni-Al_(2)O_(3)镀层的连杆轴瓦磨损量仅为0.31 mg,耐磨性高于未涂覆Ni-Al_(2)O_(3)镀层的连杆轴瓦。The influence of ultrasonic power on the wear resistance of Ni⁃Al_(2)O_(3) coating on the surface of connecting rod bearing shell was studied by ultrasonic⁃jet electrodeposition method. The surface morphology,phase composition and microstructure of Ni⁃Al_(2)O_(3) coating were analyzed by scanning electron microscope(SEM),energy spectrum analyzer(EDS),X⁃ray diffractometer (XRD)and high resolution electron microscope(TEM). The micro⁃hardness and wear resistance of Ni Al_(2)O_(3) coating were studied by friction and wear testing machine and nano⁃microhardness tester. The results show that the Al_(2)O_(3) nanoparticles can be better suspended in the plating solution by ultrasonic power stirring the plating solution through cavitation effect and micro⁃jet effect,thus affecting the wear resistance of the coating. When the ultrasonic power is 200 W,the Ni peak in the Ni⁃Al_(2)O_(3) coating is low and wide,the grain size is small,the structure is dense,the microhardness reaches 639.2HV,the friction factor and the wear loss are 0.53 and 0.27 mg,respectively. The wear of the connecting rod bearing bush coated with Ni⁃Al_(2)O_(3) coating is only 0.31 mg,and the wear resistance is higher than that of the connecting rod bearing bush without Ni⁃Al_(2)O_(3) coating.

关 键 词：超声-喷射电沉积 Ni-Al_(2)O_(3)镀层 空化效应 显微硬度 耐磨性能 

分 类 号：TG174.4[金属学及工艺—金属表面处理]