亚微米陶瓷颗粒补强合金化涂层的研究  

Sub-micron Ceramics Particle Reinforced Alloying Coating

作　　者：徐晶[1,2] 王文焱[1,2] 谢敬佩[1,2] 王爱华[3] 熊钊颋[3] 

机构地区：[1]河南科技大学材料科学与工程学院 [2]河南省有色金属材料科学与加工技术重点实验室 [3]华中科技大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2009年第11期1001-1003,共3页Special Casting & Nonferrous Alloys

基　　金：河南省教育厅自然科学研究资助项目(2007430003);河南科技大学科学研究基金资助项目(2007zy044);河南科技大学实验技术开发基金资助项目(sy0708053)

摘　　要：以亚微米级TiC和CrxCy合金混合粉末为原料,采用激光合金化技术在球铁表面制备出耐磨、耐腐蚀、耐高温的合金化层。利用XRD、SEM、EDS等分析了激光合金化层的相组成及微观组织,并测试了激光合金化的显微硬度,在室温干摩擦条件下测试了涂层的耐磨性。结果表明,合金化涂层致密,硬度(HV)达930(测试载荷2000N),干摩擦条件下材料磨损量是基材球墨铸铁的1/16,合金化涂层的耐磨性有一定的提高。Alloying coating with wear resistance,corrosion resistance,anti-high temperature was prepared on the surface of ductile iron using sub-micron TiC and CrxCy alloy mixed powder as raw materials by the laser alloying method.Constituent and microstructure of the alloying coating were analyzed by XRD,SEM,EDS,and micro-hardness was examined,and wear resistance was tested in condition of dry friction at room temperature.The results reveal that alloying coating with compact structure is 930 HV in micro-hardness and is 1/16 of ductile iron in wear rate in condition of dry sliding friction,showing the improvement of wear resistance of alloying coating.

关 键 词：球墨铸铁 激光合金化 显微组织 显微硬度 耐磨性 

分 类 号：TG174.4[金属学及工艺—金属表面处理]