TiAlN镀层硬质合金结构及性能研究  

Investigation on structure and properties of TiAlN coated hard metal

作　　者：赵立新[1] 郑立允[1] 牛兰芹[1] 赵树国[2] 王丽平[2] 

机构地区：[1]河北工程大学机电学院,河北邯郸056038 [2]邯郸职业技术学院机电系,河北邯郸056001

出　　处：《金属热处理》2008年第7期16-19,共4页Heat Treatment of Metals

基　　金：河北省科技支撑计划项目(07215170);邯郸市科技支撑计划项目(072113046-2)

摘　　要：采用多弧离子镀技术在WC基硬质合金基体上制备了TiAlN镀层,利用扫描电镜、扫描探针显微镜、X射线衍射仪、努氏显微镜硬度计、划痕仪等分析设备对镀层的形貌、粗糙度、结构和性能进行了分析。结果表明,WC基硬质合金基体上沉积的TiAlN镀层表面粗糙,平均粗糙度高达272.2nm,而且镀层液滴的方向都向着圆心。TiAlN镀层显微硬度达到3208HK,镀层与硬质合金基体之间的临界载荷最大为56.42N。镀层的划痕沟比较平直,只在接近结束端时才出现密集而细小的裂纹,但是没有膜基开裂现象。切削试验表明,带镀层的硬质合金刀具其使用寿命是无镀层硬质合金刀具的3倍。TiAlN coating was prepared on WC-based hard alloy using multiare ion plating technique. The morphology, roughness, structure and properties of the coating were investigated using scanning electronic microscope, scanning probe microscope, X-ray diffraetometer, Knoop mierohardness tester and scratch tester. The results show that the surface of deposited TiAlN coating is rough and with average roughness of 272.2 nm. Droplet of the coating is in the direction of pointing to centre of circle cutting tool. The eoating＇s mierohardness reached 3208 HK. The maximum critical load between TiAlN eoaing and hard alloy matrix is 56. 42 N. Scratch are straight and there is little crack on the coating. But there is no crack between the coating and substrate. The cutting results show that the service life of the coated hard alloy cutting tool is three times of that of the uncoated hard alloy cutting tool.

关 键 词：硬质合金 多弧离子镀 TiAlN镀层 

分 类 号：TG174.444[金属学及工艺—金属表面处理]