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贾震,王毛,韩志仁,范作军,丛家慧.高温合金筒内旋压锯齿形沟槽微观组织特征[J].稀有金属材料与工程(英文),2019,48(5):1401~1405.[Z. Jia,M. Wang,Z. R. Han,Z. J. Fan and J. H. Cong.Microstructure characteristics of the serrated groove formed by inner spinning on the high temperature alloy tube[J].Rare Metal Materials and Engineering,2019,48(5):1401~1405.]
Microstructure characteristics of the serrated groove formed by inner spinning on the high temperature alloy tube
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Received:February 14, 2018  Revised:April 12, 2019
DOI:
Key words: Serrated groove  Inner spinning  High temperature alloy tube  Microstructure characteristics  Micro-hardness
Foundation item:辽宁省自然科学基金 (No. 201602558),辽宁省教育厅科学基金(No. L201748),航空制造工艺数字化重点学科实验室开放基金(No. SHSYS2017001)
Author NameAffiliation
Z. Jia,M. Wang,Z. R. Han,Z. J. Fan and J. H. Cong  
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Abstract:
      A large-diameter thin-walled high temperature alloy tube with serrated groove is produced by inner spinning whose blank is welded up, and the micro-hardness and microstructure characteristics of the serrated groove in the tube are investigated. The welding results in coarse and uneven dendrites in the as-welded joint, which leads to larger the micro-hardness difference between the as-welded joint and the out of -welded joint zone. Both the original grains from the outer of the welded joint zone and the dendrites of the as-welded joint are refined by the inner spinning on the serrated groove. The micro-mechanical property unevenness of the serrated groove is significantly improved by severe plastic deformation.