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首页> 外文期刊>Journal of Manufacturing Processes >The metallurgical bonding and high temperature tensile behaviors of 9Cr-1W steel and 316L steel dissimilar joint by friction stir welding
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The metallurgical bonding and high temperature tensile behaviors of 9Cr-1W steel and 316L steel dissimilar joint by friction stir welding

机译：9Cr-1W钢和316L钢异种接头摩擦搅拌焊接的冶金结合和高温拉伸性能

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摘要

Dissimilar welded joints of 9Cr-1W reduced activation ferritic/martensitic (RAFM) steel and 316 L austenitic stainless steel were made by friction stir welding (FSW) with optimized welding parameters. In stir zone (SZ), mechanically mixing and metallurgical bonding of the two materials are observed. A alpha + gamma two-phase microstructure is observed nearby the bonding interface characterized by diffusion of Cr and Ni from 316 L steel side to RAFM steel side during FSW process. The grain size and dislocation density of the SZ 316 L in are critical for high temperature tensile behavior of the joint. Reducing the rotational speed or placing 316 L at AS could enhance the grain refining, but lead to the increase of the dislocation density of SZ 316 L. The tensile properties of the joint at 550 degrees C are 297.5 MPa yield strength, 546.5 MPa ultimate tensile strength and 17.5% elongation.
机译：通过具有最佳焊接参数的搅拌摩擦焊（FSW）制成了9Cr-1W还原活化铁素体/马氏体（RAFM）钢和316 L奥氏体不锈钢的异种焊接接头。在搅拌区（SZ），观察到两种材料的机械混合和冶金结合。在结合界面附近观察到α+γ两相微结构，其特征在于在FSW过程中Cr和Ni从316 L钢侧向RAFM钢侧扩散。 SZ 316 L in的晶粒尺寸和位错密度对于接头的高温拉伸性能至关重要。降低旋转速度或在AS处放置316 L可以增强晶粒细化，但会导致SZ 316 L的位错密度增加。550℃时接头的拉伸性能为297.5 MPa屈服强度，546.5 MPa极限拉伸强度和17.5％的伸长率。

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  • 来源
    《Journal of Manufacturing Processes》 |2019年第8期|241-251|共11页
  • 作者

    He Bin; Cui Lei; Wang Dongpo; Liu Yongchang; Liu Chenxi; Li Huijun;

  • 作者单位

    Tianjin Univ, Sch Mat Sci & Engn, Tianjin Key Lab Adv Joining Technol, Tianjin 300354, Peoples R China;

    Tianjin Univ, Sch Mat Sci & Engn, Tianjin Key Lab Adv Joining Technol, Tianjin 300354, Peoples R China;

    Tianjin Univ, Sch Mat Sci & Engn, Tianjin Key Lab Adv Joining Technol, Tianjin 300354, Peoples R China;

    Tianjin Univ, Sch Mat Sci & Engn, Tianjin Key Lab Adv Joining Technol, Tianjin 300354, Peoples R China|Tianjin Univ, Sch Mat Sci & Engn, State Key Lab Hydraul Engn Simulat & Safety, Tianjin 300354, Peoples R China;

    Tianjin Univ, Sch Mat Sci & Engn, Tianjin Key Lab Adv Joining Technol, Tianjin 300354, Peoples R China|Tianjin Univ, Sch Mat Sci & Engn, State Key Lab Hydraul Engn Simulat & Safety, Tianjin 300354, Peoples R China;

    Tianjin Univ, Sch Mat Sci & Engn, Tianjin Key Lab Adv Joining Technol, Tianjin 300354, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Friction stir welding; Dissimilar joint; Reduced activation ferritic/martensitic steel; Austenitic stainless steel; Metallurgical bonding; High temperature tensile behavior;

    机译：摩擦搅拌焊接;异种接头;减少激活铁素体/马氏体钢;奥氏体不锈钢;冶金粘合;高温拉伸行为;

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