SDC90钢CrTiAlN和AlTiN涂层承载能力和耐磨性的研究  

LOAD CAPACITY AND ABRASIVE RESISTANCE OF Cr Ti Al N AND Al Ti N COATINGS ON SDC99 STEEL

作　　者：朱雪飞[1] 刘云超[1] 施雯[1] 

机构地区：[1]上海大学材料科学与工程学院,上海200072

出　　处：《上海金属》2016年第1期15-19,共5页Shanghai Metals

摘　　要：采用非平衡磁控溅射与多弧离子镀技术分别在SDC90模具钢表面制备CrTiAlN与TiAlN涂层，采用SEM、XRD及M200等观察与测定涂层的微观形貌与组织、承载能力及摩擦磨损性能。研究表明：CrTjAlN涂层致密、无柱状晶，AlTiN涂层存在黑色颗粒，有轻微的柱状晶，粗糙度和厚度略高于前者；涂层显著提高了模具钢的表面硬度（1887—2482HV0.245N）及承载能力，其中CrTiAlN涂层韧性优于AlTiN涂层；强、韧表面有效降低模具钢的磨损体积与磨损率，磨损18h后CrTiAlN与AlTiN涂层的磨损体积分别为基体的48％和28％，磨损率分别为基体的60％和28％；高硬度的AlTiN涂层显示出更好的耐磨性能；磨损机制主要为疲劳磨损。The CrTiAlN and TiAlN coatings onto surfaces ot the SDC90 die steel were prepared by an unbalanced magnetron sputtering and arc ion plating, respectively. Morphologies and microstructures, properties in terms of hardness, indentation, and wear resistance of coatings were characterized with SEM, XED, M200 wear tester and so on. Result showed that CrTiAlN coating was density with no columnar crystal, while there were some black particles onto AlTiN coating surface with slight columnar crystal. These coatings significantly improved the surface hardness of steel （1887 - 2 482 HV0.245N） and bearing loading capacity, contributing low wear volume and wear rate. After wear tests for 18 h, wear volume and wear rate of CrTiA1N coating was 48% and 60% of matrix, respectively, while AlTiN coating was 28% of the matrix steel. The wear mechanism was mainly fatigue wear.

关 键 词：CrTiAlN涂层 AlTiN涂层 承载能力 耐磨性 

分 类 号：TG71[金属学及工艺—刀具与模具]