T91钢管TLP与TIG+MIG焊接接头组织与性能
Microstructure and Properties of TLP and TIG+MIG Joint of T91 Steel Pipe
王非森1， 陈思杰2， 高 增2， 文申柳1
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作者单位：四川化工职业技术学院 机械工程系，四川 泸州 646000； 2.河南理工大学 材料科学与工程学院，河南 焦作454000
中文关键字：T91钢；瞬时液相扩散焊（TLP）；TIG+MIG焊；力学性能；对比试验
英文关键字：T91steel； transient liquid-phase bonding； TIG+MIG bonding； mechanical property； orthogonal test
中文摘要：分别采用瞬时液相扩散焊（TLP）和TIG＋MIG对T91钢管进行焊接，通过对比试验，分析了TLP和TIG＋MIG焊接接头在力学性能和显微组织上的差异。结果表明：采用TLP焊接T91钢管时，接头抗拉强度和抗弯强度均强于TIG＋MIG焊接；接头组织更加均匀细小，与母材接近。得出更低的焊接温度、更短的高温停留时间、合金元素均匀扩散和等温凝固使得TLP焊接接头性能优于TIG＋MIG焊接接头。
英文摘要： T91 steel pipe was proceeded on TLP bonding and arc welding with metal inert-gas arc welding. Mechanical property and microstructure of T91 steel pipe joint with TLP bonding was researched by contrast test. The results show that tensile strength and bend strength of TLP joint is bigger than that of TIG+MIG joint, the microstructure of TLP joint is more homogenous and smaller, close to base metal. The reason for TLP joint performance better than that of TIG+MIG joint is that lower bonding temperature, shorter high-temperature residence time, isothermal solidification and alloying elements evenly spread.