焊后热处理工艺对堆焊层Fe含量稀释率的研究  

Study on the influence of postweld heat treatment procedure on the dilution rate of Fe content in Inconel 625 overlaying layer

作　　者：谢建昌 XIE Jianchang(Shanghai Ruimai Heavy Industry Co.,Ltd.,Shanghai 201101,China)

机构地区：[1]上海锐迈重工有限公司,上海201101

出　　处：《电焊机》2019年第9期116-118,共3页Electric Welding Machine

摘　　要：镍基合金具有良好耐高温性能和耐腐蚀性能,在碳钢或合金钢表面堆焊625镍基合金,在保证基材强度的同时,又可以确保材料的耐腐蚀性,也节省了材料采购成本。稀释率的大小影响着镍基合金的组织和性能,也影响着堆焊层的耐腐蚀性能。主要介绍焊后热处理工艺对堆焊层Fe含量稀释率的影响,为生产提供可行性方案。选择不同的基材,分别堆焊镍基合金625,堆焊层厚度大于等于3 mm,堆焊至少2层,然后进行焊后热处理有无对比试验。通过对比分析堆焊层不同区域的Fe含量,最终得出焊后热处理对堆焊层Fe含量稀释率无明显影响。距离焊缝熔合线越近,Fe含量稀释率越大。Nickel base alloy has good high temperature resistance and corrosion resistance,adopting 625 nickel-based alloy for the overlaying on the surface of carbon steel or alloy steel can guarantees the strength of the base material,ensures the corrosion resistance of material,and saves the material procurement cost.The dilution rate affects the microstructure and mechanical properties of nickel base alloy,also affects the corrosion resistance of the overlaying layer.The effect of postweld heat treatment on the dilution rate of Fe content in overlaying layer is investigated,which supply feasibility solution for production.The Inconel 625 is used for overlaying of different base materials respectively,the thickness of overlaying layer is not less than 3 mm,and it should be at least two layers.And then the postweld heat treatment with or without contrast test is carried out.By comparing and analyzing the Fe element contents in different areas,the results show that postweld heat treatment has no significant effect on the dilution rate of Fe content in overlaying layer.The closer the distance from weld fusion line,the higher the dilution rate of Fe content.

关 键 词：焊后热处理 INCONEL 625堆焊 Fe含量 稀释率 

分 类 号：TG441.8[金属学及工艺—焊接]