Application of in-situ synthesis of nickel-based anti-abrasion coating by argon-arc cladding on plowshare

Hao Jianjun,Ma Yuejin,Li Jianchang,Zhao Jianguo,Shen Yuzeng(College of Mechanical and Electrical Engineering,Agricultural University of Hebei,Baodin 071001,China)

argon-arc cladding;in-situ synthesis;nickel-based coating;TiC particle;wear-resistance;plowshare

In order to improve the wear-resistance property of carbon steel,the in-situ synthesis of TiC/Ni composite coating by(argon-)arc cladding technology was conducted and its application for plowshare was discussed.The microstructure and properties of the coating were investigated by metallographic microscope,scanning electron microscope,X-Ray diffractometer,transmission(electron) microscope and microhardness tester model.The wear-resisting property of the cladding was tested on home-made(abrasion) tester.The results show that excellent bonding between the coating and the carbon steel substrate is strengthened by the strong(metallurgical) interface,and the coating is uniform,continuous and almost defect-free.The microstructure of the cladding is mainly composed of γ-Ni austenitic dendrite,CrB,M23C6,TiB2 and spherical TiC ceramic particle which is synthesized in-situ and(dispersively) distributed in the cladding.The maximum hardness of the cladding is HV0.21000,and appears graded distribution.The anti-abrasive test results show that the cladding is good at anti-abrasive and the abrasive performance is better than 65Mn steel treated by quenching and tempering.The field test results show that the technology is feasible to the manufacture and remanufacture of the wearable parts of agricultural machinery.