表面技术2017，Vol.46Issue(10)：161-167,7.DOI:10.16490/j.cnki.issn.1001-3660.2017.10.023
冷喷涂Cu402F涂层激光重熔表面改性后摩擦学行为
Tribological Behavior of Cold Sprayed Cu402F Coating after Laser Remelting
摘要
Abstract
The work aims to study tribological behavior of cold sprayed Cu402F coating in corrosive medium after laser remelting. Laser remelting technology was applied to modify properties of a nearly 882.11μm thick cold sprayed Cu402F coat-ing, which was prepared on nickel-aluminum bronze by adopting cold spraying technology. Microstructure of coating section and surface was observed by using OM and SEM; structure, surface residual stress, tribological properties and corrosion beha-vior of the coating were mainly studied by using XRD, X-ray residual stress tester, multi-function surface property tester and multi-frequency linear reciprocating abrasion tester. Laser remelted coating was divided into surface remelted layer, porous re-melted transition layer and cold spray inherited layer. Phases and residual stress of the coating did not change greatly after laser remelting. Average friction coefficient of the laser remelted coating increased progressively under the load of 20, 50 and 100 N, the wear rate was 1.01×10-2, 1.17×10-2 and 1.34×10-2 mm3/(N·m), respectively. The abrasion test indicated that generation and breaking of passive film on surface of the coating appeared alternately, reflecting synergistic effect of wear and corrosion. OCP (open circuit potential) was positively correlated with friction coefficient, indicating that the generation of passive film was faster than destruction. Laser remelting reserve the advantages of cold spayed Cu402F coating. Meanwhile, quicker generation of passive film on laser remelted coating contributes to abrasion resistance improvement of coating.关键词
激光重熔/冷喷涂/Cu402F/摩擦学/螺旋桨/再制造Key words
laser remelting/cold spray/Cu402F/tribology/propeller/remanufacturing分类
矿业与冶金引用本文复制引用
陈正涵,孙晓峰,李占明,史玉鹏,刘小桐..冷喷涂Cu402F涂层激光重熔表面改性后摩擦学行为[J].表面技术,2017,46(10):161-167,7.基金项目
军内科研基金 Supported by the Military Research Fund （）
