异质异构金属激光熔覆成形工艺研究

Research on Laser Cladding of Heterogeneous Metals

通过前期对金属激光熔覆成形的工艺参数探索,采用了具有耐热性的ln718与冶金行业常用的T91、SSL316、SSL304以及Fe30四种铁基合金两两组合,基于交叉和层叠结构的不同组合打印了若干样件。通过电镜对样件内部形貌、组织进行检测,EDS测定了样块过渡区元素分布。结果表明:In718+Fe30的组合,从实验分析的角度看,性能目前为最优。在近熔点异质材料成形时,弹性模量差异大、元素成分含量相近有利于形成性能良好的界面。

The laser cladding forming process of bimetallic heterogeneous combination was studied. Through the previous exploration of the process parameters of metal laser cladding. ln718 with heat resistance and T91, SSL316, SSL304 and Fe30 which were commonly used in the metallurgical industry are combined in pairs, and several samples were printed based on the two structures of crossover and cascade.The internal microstructure of the sample were detected by electron microscope, and the element distribution in the transition zone of the sample was determined by EDS. The results show that the combination of In718 and Fe30 is optimal from the perspective of experimental analysis. When the near-melting point heterogeneity materials are formed, the large difference of elastic modulus and the similar element content are conducive to the formation of a good performance interface.