针对煤矿机械液压支柱热喷涂修复中涂层结合强度低的实际,研究了在27SiMn钢基体上火焰喷涂新研制的镍铝合金丝制备镍铝涂层,并与火焰喷涂镍包铝粉末、镍铝复合丝制备的镍铝涂层在组织结构、表面形貌、结合强度等方面进行了比较分析。结果表明,镍铝合金丝制备的涂层与基体之间主要为冶金结合,结合强度比镍包铝粉末涂层提高46.8%,比镍铝复合丝涂层提高8%,涂层组织结构致密,气孔率低、质杂少。 Aiming at the fact that the bonding strength is low during the thermal spray repairing of hydraulic prop in coal mine machinery, the nickel-aluminum coating newly developed by flame spraying on 27SiMn steel substrate was studied and compared with flame spraying nickel-coated aluminum powder, The Ni-Al coatings prepared from the composite wires are comparatively analyzed in terms of structure, surface morphology and bonding strength. The results show that the coating prepared from Ni - Al alloy wire is mainly metallurgical bonded with the matrix, the bonding strength is increased by 46.8% compared with nickel - coated aluminum powder coating, 8% higher than Ni - Al composite wire coating, the coating structure is compact, Low porosity, quality and less.