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常铁军, 龚正春, 李子峰, 王长柏. T91钢TIG+MIG焊接接头性能及组织[J]. 焊接学报, 2005, (12): 59-61,88.
引用本文: 常铁军, 龚正春, 李子峰, 王长柏. T91钢TIG+MIG焊接接头性能及组织[J]. 焊接学报, 2005, (12): 59-61,88.
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CHANG Tie-jun, GONG Zheng-chun, LI Zi-feng, WANG Chang-bai. Mechanical properties and microstructure of TIG+MIG welded joint of T91 steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2005, (12): 59-61,88.
Citation: CHANG Tie-jun, GONG Zheng-chun, LI Zi-feng, WANG Chang-bai. Mechanical properties and microstructure of TIG+MIG welded joint of T91 steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2005, (12): 59-61,88.
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T91钢TIG+MIG焊接接头性能及组织

Mechanical properties and microstructure of TIG+MIG welded joint of T91 steel

    摘要
  • 摘要: 对采用TIG+MIG焊的T91钢焊接接头进行了力学性能、持久强度和高温时效试验,并对T91钢TIG+MIG焊接接头的显微组织及断口的断裂特征进行了观察和分析。结果表明,T91钢TIG+MIG焊接接头的韧脆转变温度(FATT)为-13℃,625℃17958h高温持久试验为70MPa,外推105h高温持久强度为46.48MPa。焊接接头的高温性能取决于其组织的变化,以MC23C6为主的合金碳化物对持久强度起了重要作用。

     

    Abstract: The mechanical properties, creep strength and high temperature ageing of TIG+MIG welded joint of T91 steel were tested. Microstructure and fracture morphology of the joint was analyzed. The creep strength of 625℃ for 17958 h is 70 MPa, which can deduce that the sustained strength after 105 h is 46.5 MPa and the FATT is -13℃. It is proved that the properties of TIG+MIG welding joint at high temperature is determined by the change of microstructure. Furthermore, M23C6 plays an important role.

     

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