摘要
通过超音速火焰喷涂(AC-HVAF)在稀土镁合金表面制备WC-10Co-4Cr与Ni粉质量比为0∶10、1.5∶8.5、3∶7、4.5∶5.5的WC-Co-Cr-Ni涂层。分析了涂层的组织结构,研究了摩擦载荷、磨损速率对磨损性能的影响及涂层在盐溶液中的抗腐蚀性能。结果表明:4种涂层的组织均匀致密,当加入WC时形成了明显的层状结构。WC的质量分数为15%时涂层内部的缺陷稍有增加。WC含量增加时,涂层内部的缺陷减少,层状结构更明显。WC的质量分数为45%时,耐磨性最佳。WC的质量分数为15%的涂层磨损量较大。涂层在3.5%(质量分数)NaCl溶液中的微量缺陷影响其耐蚀性。WC质量分数为45%的涂层在腐蚀过程中表面易形成氧化物钝化膜,可提高涂层耐蚀性。
bstract Four WC-Co-Cr-Ni coatings with WC-10Co-4Cr and Ni powder mass ratios of 0∶10,1.5∶8.5,3∶7,and 4.5∶5.5 were prepared on the surface of rare earth magnesium alloy by the high-velocity-air-fuel(HVAF)spraying.The structure of the coating and the effect of friction load and wear rate on the wear performance as well as the corrosion resistance of the coating under salt solution were studied.The results show that the structure of the four coatings areuniform and dense,and a obvious laminar structure is formed with adding WC.When the WC content is 15%,the defects inside the coating increase slightly,and when the WC content further increases,the defects inside the coating decrease and the lamellar structure becomes more obvious.When the WC content is 45%,the coating shows a best wear resistance.The coating with 15%content of WC exhibits a higher wear loss.The micro defects of coating in 3.5%(mass fraction)NaCl solution affect the corrosion resistance.The coating is prone to form an oxide passivation film on the surface during the corrosion process when the WC content is 45%,thus improving the corrosion resistance of coating.
作者
叶玉刚
周雪东
YE Yugang;ZHOU Xuedong(Department of Mechanical Engineering,Shanxi Institute of Technology,Yangquan 045000,China;School of Materials Science and Engineering,North University of China,Taiyuan 030051,China)
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
2023年第6期11-17,共7页
Ordnance Material Science and Engineering
基金
国家自然科学基金(52075501)
山西省研究项目(20210302124206)。
