压力和保护气对开放环境下TLP连接接头的影响
Effects of Pressure and Gas Protection on TLP Bonding Joint
陈思杰
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作者单位：（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； 瞬时液相扩散连接； 中间层； 显微组织
英文关键字：T91 steel; TLP bonding; interlayer; microstructure
中文摘要：用铁镍非晶合金箔作中间层，在大气环境下对T91耐热钢进行瞬时液相扩散连接，通过接头室温力学性能的测试以及弯曲断囗形貌的扫描电镜观察分析，研究了连接压力、保护气对接头组织性能的影响。研究表明，连接压力有助于排除多余的中间层，施加保护气有助于液态中间层的净化；在双温工艺条件下，保护气压力0.3MPa，连接压力为6MPa获得的接头质量很好。
英文摘要：T91 steel pipes were joined by transient liquid-phase (TLP) bonding process. Microstructure evolution during TLP bonding of T91 steel tube was investigated. In order to evaluate mechanical property of the joint, the tensile strength test was carried out at room temperature. The testing results show that the pressure helps exclude redundant connections in the middle layer, the protective gas helps middle layer liquid purification under dual-temperature process conditions, the protection of air pressure is 0.3 MPa, the good quality joints can be obtained under the pressure of 6 MPa.