摘要
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 Ti_（33）Al_（67）N/Cr_（30）Al_（70）N（GT-1）,Ti_（50）Al_（50）N/Cr_（30）Al_（70）N（GT-2） and Cr_（30）Al_（70）ln（GT-3） coatings were deposited by cathodic arc ion platting on the substrate of cemented carbide YG8. The tribological behavior of（GTs-1,2 and 3） coatings,in sliding against ball of 304 austenitic stainless steel,was investigated with scanning electron microscopy,energy dispersive spectroscopy and conventional mechanical probes. The results show that among the three coatings,GT-1 has the highest hardness（3600 HV0. 01） and the weakest interfacial adhesion（40 N）;GT-2 displays the lowest hardness（290 0HV0. 01） and the strongest interfacial adhesion（80 N）; whereas GT-3possesses the highest wear-resistance against 304 alloy ball,because of its strongest oxidation resistance. Dominant adhesive-wear mechanism of the three coatings and metals droplets explain the local peeling-off damages. Moreover,GTs-2 and 3 have lower wear-rate than GT-1 and the W-contents on their wear-tracks＇ surfaces were only about 1/10 of that on GT-1,simply because of their stronger interface adhesion.
作者
唐宇鑫
苏东艺
彭继华
郑佳荣
Tang Yuxin Su Dongyi Peng Jihua Zheng Jiarong(School of Material Science and Engineering,South China University of Technology, Guangzhou 510640, China Guangzhou Grandtech coating Co. Limited, Guangzhou 510000, China)
出处
《真空科学与技术学报》
EI
CAS
CSCD
北大核心
2017年第1期65-70,共6页
Chinese Journal of Vacuum Science and Technology
基金
广东省科技厅项目(2015B090923006)
广州市科技项目(201604010020):
