启闭机活塞杆表面爆炸喷涂制备Al2O3涂层的显微组织与性能  

Microstructure and properties of Al2O3 coating on the surface of hoist piston rod prepared by explosive spraying

作　　者：伏利 陈小明 毛鹏展 刘伟 张磊 张凯 李育洛 FU Li;CHEN Xiaoming;MAO Pengzhan;LIU Wei;ZHANG Lei;ZHANG Kai;LI Yuluo(Key Laboratory of Surface Engineering of Equipment for Hydraulic Engineering of Zhejiang Province,Standard&Quality Control Research Institute,Ministry of Water Resources,Hangzhou 310012,China;Water Machinery and Remanufacturing Technology Engineering Laboratory of Zhejiang Province,Hangzhou Mechanical Design Research Institute,Ministry of Water Resources,Hangzhou 310012,China;State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing)

机构地区：[1]水利部产品质量标准研究所浙江省水利水电装备表面工程技术研究重点实验室,杭州310012 [2]水利部杭州机械设计研究所水利机械及其再制造技术浙江省工程实验室,杭州310012 [3]北京科技大学新金属材料国家重点实验室,北京100083

出　　处：《粉末冶金材料科学与工程》2020年第5期410-416,共7页Materials Science and Engineering of Powder Metallurgy

基　　金：浙江省科技计划资助项目(2018C37029,2019C04019,G C19E090001)。

摘　　要：采用新型的CCDS2000型爆炸喷涂系统在启闭机活塞杆常用不锈钢40Cr表面制备由WC-12Co粘结层和Al2O3面层构成的复合涂层,对涂层的微观组织结构、显微硬度、孔隙率、结合强度、抗冲击韧性、抗腐蚀性能与耐磨性能等进行分析与测试,并阐述涂层的摩擦磨损机理。结果表明:Al2O3涂层的孔隙率为0.94%,硬度(HV0.2)在1108~1316之间,结合强度达到59.4 MPa。涂层的抗腐蚀性能和抗磨损性能都明显优于40Cr不锈钢,抗冲击韧性略有提高。40Cr不锈钢的平均质量磨损量是99.56 mg,为Al2O3涂层质量磨损量的24.5倍。Al2O3涂层的磨损机理主要是显微犁削和黏着磨损。A composite coating composed of WC-12Co adhesive layer and Al2O3 surface layer was prepared on 40Cr stainless steel surface of hoist piston rod by new type CCDS2000 explosive spraying technology.The microstructure,microhardness,porosity,bonding strength,impact toughness,corrosion resistance and wear resistance of the coating were analyzed and tested.The friction and wear mechanism of the coating was also analyzed.The results show that the porosity of the Al2O3 coating is 0.94%.The hardness is in the range of 1108-1316 HV0.2.The bonding strength can reachs to 59.4 MPa.The corrosion resistance and wear resistance of the coating are obviously better than that of 40Cr stainless steel,and the impact toughness is slightly improved.The average mass wear loss of 40Cr stainless steel is 99.56 mg,which is 24.5 times of that of Al2O3 coating.The wear mechanism of Al2O3 coating is mainly micro ploughing and adhesive wear.

关 键 词：爆炸喷涂 40Cr不锈钢 活塞杆 AL2O3涂层 冲击韧性 摩擦磨损 

分 类 号：TG147[一般工业技术—材料科学与工程]