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CMT-Pin additive preparation of GH4169 high temperature alloy columnar array forming process and Microstructure
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1.School of Aeronautical Manufacturing Engineering,Nanchang Hangkong University;2.Capital Aerospace Machinery Company,Bengjing ,China

Clc Number:

TG457.1

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    Abstract:

    In this paper,we used ?1.2mm ER-GH4169 welding wire to prepare columnar array structure on 5mm thick Q235 carbon steel substrate by CMT-Pin additive technique,and investigated the Pin forming process and tissue characteristics.The results show that when the Ball/Cyl Adaptation parameter is negative,the Pin head shape is Cylindrical;when the Ball/Cyl Adaptation is non-negative,the Pin head shape is Ball;Altitude Adaptation controls the height of Pin growth,and the Pin height is obtained between (2.30~4.96)mm.The microstructure of Pins is divided into Pin axis zone,fusion zone,and base material zone;Pin axis area has a large number of columnar crystals,which grow outward along the axis; in the fusion area,the columnar crystals change from fine crystals to coarse crystals along the Pin axis upward,and the fusion area is a very fine fusion line,with a large number of strips of Laves phase precipitated between the crystals;in the base material area,there is a tissue of light and dark interlayer.

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[Xiao Penghua, Wang Lei, Tang Yingying, Xiao Lin, Xia Chun, Liu Fencheng, Ke Liming. CMT-Pin additive preparation of GH4169 high temperature alloy columnar array forming process and Microstructure[J]. Rare Metal Materials and Engineering,2023,52(6):2134~2140.]
DOI:10.12442/j. issn.1002-185X.20220431

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History
  • Received:May 17,2022
  • Revised:June 26,2022
  • Adopted:July 12,2022
  • Online: July 07,2023
  • Published: June 30,2023