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申佳林,朱学儒,魏志坚,梁宇,梁益龙,江飞龙,肖志祥.焊后热处理对GH4169合金闪光焊接接头组织与性能的影响[J].稀有金属材料与工程(英文),2018,47(12):3839~3847.[Jia-lin Shen,Xue-ru Zhu,Zhi-jian Wei,Yu Liang,Yi-long Liang,Fei-long Jiang and Zhi-xiang Xiao.Influence of Post-Weld Heat Treatment on Microstructure and Mechanical Properties of GH4169 Alloy Flash Butt Welded Joint[J].Rare Metal Materials and Engineering,2018,47(12):3839~3847.]
Influence of Post-Weld Heat Treatment on Microstructure and Mechanical Properties of GH4169 Alloy Flash Butt Welded Joint
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Received:March 24, 2017  Revised:May 22, 2017
DOI:
Key words: GH4169 alloy  Flash butt welding  Heat treatment  Pre-deformation  Mechanical properties
Foundation item:国家自然科学基金(No. 51461007);贵州省自然科学基金(Nos. [2014]2003, [2015]3012)
Author NameAffiliation
Jia-lin Shen,Xue-ru Zhu,Zhi-jian Wei,Yu Liang,Yi-long Liang,Fei-long Jiang and Zhi-xiang Xiao  
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Abstract:
      Samples of flash butt welded GH4169 alloy were investigated in this research. Experimental results indicate that redissolution happened to the strengthening phase γ″ and γ′ under the welding heat, so that the strength and microhardness of the weldingSzone are lower than that of the base metal (BM). After solid solution treatment, the strength of the BM is reduced to the same as that of the weldents, the uniform deformation between the welding zone and the BM can be realized during tensile deformation. The 1.2% tensile plastic deformation was carried out before or after solid solution on the weldments respectively, after completing aging heat treatment (720 ℃8 h(60 ℃/h)-620 ℃8 h AC (air cooling)), the tensile results show that a small amount of plastic deformation has little effect on its mechanical properties. After solution-ageingStreatment, the tensile strength of the pre-deformation weldments is similar to that of the BM, but the plastic index is lower, this is related to the coarse grains in the welding zone.