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采用高速电弧喷涂技术在20钢表面制备FeNiCrTi涂层。结合显微组织、显微硬度、扫描电镜分析、能谱分析、X射线衍射等分析方法对涂层的组织结构、力学性能及拉伸断口形貌进行研究分析。结果表明:FeNiCrTi涂层主要由固溶相的凝片叠加组成,中间夹杂着氧化物相、未熔颗粒相和孔隙;涂层具有较高的显微硬度和内聚强度,以及良好的抗热震性能。拉伸断口的微观特征为:固溶相的韧性韧窝特征、叠层间凝片分离脱开、未熔颗粒整体拔出。
FeNiCrTi coatings were prepared on 20 steel by high speed arc spraying. The microstructure, mechanical properties and tensile fracture morphology of the coating were investigated by means of microstructure, microhardness, scanning electron microscopy, energy dispersive spectroscopy and X-ray diffraction analysis. The results show that the FeNiCrTi coating is mainly composed of superposition of the solid solution phase of the coagulum with the oxide phase, the unmelted particle phase and the pores in between; the coating has high microhardness and cohesive strength, and good heat resistance Seismic performance. The microscopic characteristics of tensile fracture are as follows: the ductile dimples of solid solution phase are separated, the separation and separation of the condensate between the layers are separated, and the unmelted particles are pulled out as a whole.