Samodurova Marina, Shaburova Nataliya, Samoilova Olga, Moghaddam Ahmad Ostovari, Pashkeev Kirill, Ul'yanitckiy Vladimir, Trofimov Evgeny
Resource Center for Special Metallurgy, South Ural State University, 76 Lenin Av., Chelyabinsk 454080, Russia.
Department of Materials Science, Physical and Chemical Properties of Materials, South Ural State University, 76 Lenin Av., Chelyabinsk 454080, Russia.
Materials (Basel). 2021 Mar 4;14(5):1206. doi: 10.3390/ma14051206.
One of the methods of local improvement of the wear resistance of aluminum alloy parts is the deposition of hard tungsten carbide-based coatings on the surfaces subjected to intense external influence. This paper is devoted to the characterization of the WC-10Co-4Cr (wt.%) coating deposited on an Al-4Cu-1Mg (wt.%) alloy by the detonation spray method. In comparison with the common thermal spray techniques like High Velocity Oxygen Fuel (HVOF) or Atmospheric Plasma Spraying (APS), the heat input delivered to the substrate during detonation spray is significantly lower, that is especially important in case of coating deposition on aluminum alloys. The paper presents the results of morphology investigation, microstructure, phase composition, microhardness, and cohesive strength of deposited carbide-based detonation spray coating. Results showed that the coating has a porosity less than 0.5% and the carbide grain refinement down to the submicron size during coating deposition was detected. According to the investigation, the variation of spraying distance from 270 to 230 mm does not influence on the coating microstructure and composition.
提高铝合金零件耐磨性的局部改进方法之一是在承受强烈外部影响的表面上沉积基于硬质碳化钨的涂层。本文致力于通过爆轰喷涂法在Al-4Cu-1Mg（重量百分比）合金上沉积的WC-10Co-4Cr（重量百分比）涂层的表征。与诸如高速氧燃料（HVOF）或大气等离子喷涂（APS）等常见热喷涂技术相比，爆轰喷涂过程中传递到基体的热输入明显更低，这在铝合金上进行涂层沉积时尤为重要。本文介绍了沉积的碳化物基爆轰喷涂涂层的形貌研究、微观结构、相组成、显微硬度和结合强度的结果。结果表明，该涂层的孔隙率小于0.5%，并且在涂层沉积过程中检测到碳化物晶粒细化至亚微米尺寸。根据研究，喷涂距离从270毫米变化到230毫米对涂层的微观结构和组成没有影响。
