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以Inconel 625合金为修复材料,分析了10Cr5NiMoV钢表面激光成形层的组织特点,并考察了修复样件的抗拉强度、耐蚀和耐磨性能。结果表明,修复试样无裂纹、熔合不良等缺陷,热影响区宽度小于300μm,修复区枝晶细小,枝晶间为针状NbC和不规则形状Laves相;修复区和基体形成良好的冶金结合,拉伸试样断裂于基体,抗拉强度854MPa;修复区的硬度高于基体,低于热影响区,耐蚀性比基体提高约15倍,耐磨性提高约1.6倍。
The Inconel 625 alloy was used as the repair material to analyze the microstructure of the laser-formed layer on the surface of 10Cr5NiMoV steel. The tensile strength, corrosion resistance and wear resistance of the repaired sample were also investigated. The results show that the repaired samples have no cracks and poor fusion. The width of heat affected zone is less than 300μm. The dendrites in the repaired area are small with needle-like NbC and irregularly shaped Laves phases. The repair area and the substrate form a good metallurgical bond Tensile strength is 854MPa. The hardness of the repaired area is higher than that of the substrate, lower than the heat affected zone, the corrosion resistance is about 15 times higher than that of the substrate, and the abrasion resistance is increased about 1.6 times.