Cr12MoV表面DLC涂层和渗氮/QPQ表面改性工艺耐磨性能的实验研究  

Experimental Study on Wear Resistance in Surface Modification Processof Cr12MoV via DLC Coating and Nitriding/QPQ

作　　者：何霞[1,2] 庞国英 钟林[1,2] 王国荣[1,2] 魏刚 HE Xia;PANG Guoying;ZHONG Lin;WANG Guorong;WEI Gang(School of Mechanical Engineering,Southwest Petroleum University,Chengdu 610500,China;Energy Equipment Research Institute,Southwest Petroleum University,Chengdu 610500,China)

机构地区：[1]西南石油大学机电工程学院,成都610500 [2]西南石油大学能源装备研究院,成都610500

出　　处：《机械科学与技术》2024年第12期2168-2175,共8页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家重点研发计划(2019YFC0312305);国家自然基金项目(51775463);国际合作项目(2019-GH02-00055-HZ);南方海洋科学与工程广东省实验室项目(ZJW-2019-03)。

摘　　要：为探究冷作模具钢Cr12MoV基底表面DLC涂层(Diamond-like carbon films)、渗氮和盐浴复合处理(Quench-Polish-Quench,QPQ)表面改性工艺的耐磨性能优劣。基于摩擦试验机的高频往复球-盘配对副,在模拟测试工况下开展表面改性工艺的Cr12MoV试样盘与Si3N4陶瓷球配对的摩擦磨损性能实验。研究表明,在模拟测试工况下,综合摩擦因数和体积磨损率分析,DLC涂层工艺更适合改善Cr12MoV表面耐磨性能,其耐磨性能相比渗氮和QPQ提高了4倍以上,其Si3N4陶瓷对磨球表面形成碳质转移膜,阻止DLC材料的磨损。DLC试验盘粘着程度比渗氮试验盘严重,是由于高硬度比低硬度金属抗粘着能力强。DLC与QPQ试样盘表面发生塑性变形,且QPQ试样盘表面形成片状剥落坑。To explore the wear resistance in the surface modification processof DLC coating(Diamond like carbon films),nitriding and salt bath composite treatment(Quench Polish Quench,QPQ)on the substrate surface of cold work die steel Cr12MoV.Based on the high-frequency reciprocating ball disk pairing pair of the friction testing machine,the friction and wear properties of the surface modified Cr12MoV sample disk paired with Si3N4 ceramic ball were tested under the simulated conditions.The study showed that under the simulated conditions,the analysis of friction coefficient and volume-wear rate showed that DLC coating was more suitable for improving the wear resistance of Cr12MoV surface,and its wear resistance is more than 4 times higher than that vianitriding/QPQ,a carbon transfer film is formed on the surface of Si3N4 ceramic grinding ball to prevent the wear of DLC material.DLC coating provides the experimental support for improving the wear resistance of Cr12MoV surface.The adhesion degree of DLC test plate is more serious than that of nitriding test plate,because the high hardness metal has stronger anti-adhesion ability than that of the low hardness metal.The surface of DLC and QPQ sample discs has plastic deformation,and the surface of QPQ sample disc formed flake pits.

关 键 词：DLC QPQ 渗氮 摩擦因数 耐磨性能 

分 类 号：TG162.43[金属学及工艺—热处理]