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采用多弧离子镀技术在硬质合金YG8上制备了表面高铝含量的Ti33Al67N、中铝含量的Ti50Al50N复合涂层和Cr_(30)Al_(70)lN单层涂层。采用摩擦磨损仪系统研究了以上涂层与奥氏体304合金间的摩擦磨损行为。利用扫描电镜、电子能谱仪、显微硬度仪、划痕仪等对涂层性能及表面形貌、磨痕形貌及成分进行表征。试验结果表明:同含钛的表面涂层Ti33Al67N和Ti50Al50N相比,Cr_(30)Al_(70)N涂层与奥氏体304合金的亲和力更低,减少了摩擦过程中304合金在Cr_(30)Al_(70)N涂层表面的涂抹量。涂层最主要的磨损失效方式是局部撕裂,局部撕裂的本质是硬质合金基体同304合金直接接触导致高强度结点。复合涂层Cr_(30)Al_(70)N/Ti_(50)Al_(50)N及单层的Cr_(30)Al_(70)N涂层膜基结合力高,表现出优于Cr_(30)Al_(70)N/Ti_(33)Al_(67)N复合涂层的抗摩擦磨损性能;前两者磨痕表面检出的W元素含量仅为Cr_(30)Al_(70)N/Ti_(33)Al_(67)N涂层的1/10。
The surface high content of Ti33Al67N, the medium content of Ti50Al50N composite coating and the Cr_ (30) Al_ (70) lN single layer coating were prepared on cemented carbide YG8 by multi-arc ion plating. The tribological behavior of the above coating and austenitic 304 alloy was studied by using a tribometer. The properties of coating, surface morphology, wear scar morphology and composition were characterized by scanning electron microscopy, electron spectroscopy, microhardness tester and scratch tester. The results show that the adhesion of Cr 30 Al 70 N coating to austenitic 304 alloy is lower than that of Ti33Al67N and Ti50Al50N, which reduces the corrosion resistance of 304 alloy in Cr 30 ) Al 70 (70) N coating surface coating amount. The main wear failure mode of the coating is local tearing. The essence of local tearing is that the cemented carbide substrate directly contacts with the 304 alloy to result in a high-strength node. The combination of Cr 30 Al 70 N 50 Ti 50 Al 50 N and the single layer Cr 30 Al 70 Ni coating showed a higher bonding strength than that of Cr 30 (70) N / Ti_ (33) Al_ (67) N Al_ (67) N coating on the wear resistance surface of the first two samples. The W content of the first two surfaces was only Cr_ (30) Al_ (33) Al_ (67) N coating 1/10.