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激光偏束焊对铌/钢接头组织及性能的影响

石铭霄, 赵健, 陈书锦, 李天慧

石铭霄, 赵健, 陈书锦, 李天慧. 激光偏束焊对铌/钢接头组织及性能的影响[J]. 焊接学报, 2017, 38(3): 41-44.
引用本文: 石铭霄, 赵健, 陈书锦, 李天慧. 激光偏束焊对铌/钢接头组织及性能的影响[J]. 焊接学报, 2017, 38(3): 41-44.
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SHI Mingxiao, ZHAO Jian, CHEN Shujin, LI Tianhui. Effects of beam-offset on microstructure and properties of laser welded Nb/304 SS joint[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(3): 41-44.
Citation: SHI Mingxiao, ZHAO Jian, CHEN Shujin, LI Tianhui. Effects of beam-offset on microstructure and properties of laser welded Nb/304 SS joint[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(3): 41-44.
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激光偏束焊对铌/钢接头组织及性能的影响

  • 1.

    江苏科技大学 材料科学与工程学院, 镇江 212003

  • 2.

    上海工程技术大学 材料工程学院, 上海 201620

  • 3.

    北方华安工业集团有限公司 试验基地, 齐齐哈尔 161046

基金项目: 国家自然科学基金资助项目（51605205）；江苏省高校自然科学研究面上项目（15KJB460009）

Effects of beam-offset on microstructure and properties of laser welded Nb/304 SS joint

  • 1.

    School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China

  • 2.

    School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China

  • 3.

    Experiment base, North hua an industrial group co., LTD, Qiqihaer 161046, China

摘要

    摘要
  • 摘要: 文中对铌/钢进行了激光焊接，当激光束直接作用于铌/钢接触面时，由于Nb-Fe金属间化合物Fe2Nb的生成呈现连续分布的特点会使焊后接头发生断裂.针对该问题，采用激光偏束焊对铌/钢进行焊接，通过激光束偏钢侧来抑制铌的熔化量，进而减少接头中Fe2Nb的生成.结果表明，通过采用激光偏束焊的方式可以较好地抑制接头开裂的问题.组织分析表明，焊后接头组织主要由γ奥氏体相与一定量的Fe2Nb相及少量的δ铁素体组成.力学性能结果显示，断裂发生在接头Fe2Nb金属间化合物层处，其抗拉强度为221 MPa，最高硬度出现在Fe2Nb金属间化合物层约为1 143 HV.
    Abstract: In this work, the Nb/304 SS joint was welded by laser welding. The joint fractured immediately due to continuously distributed Fe2Nb intermetallic compounds when the laser was directed to the Nb/steel interface. In order to solve the problem, the laser beam-offset welding procedure was proposed. The amount of melted niobium was reduced by the laser offset effect. Finally, the formation of Fe2Nb intermetallic compounds was controlled. The results showed that laser beam-offset welding was an ideal way to control the joint crack which occurred in laser centered welding condition. The joint microstructure was mainly consisted of γ austenite phase and a certain amount of Fe2Nb intermetallic compounds with little δ ferrite phase. The tensile strength of the joint was 221 MPa, the fracture occurred in the Fe2Nb intermetallic compounds layer. The highest microhardness existed in Fe2Nb intermetallic compounds layer with a value of 1 143 HV.
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    • 参考文献(8)
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    [3] 吴金平, 杨英丽, 赵恒章, 等. Nb/304L爆炸复合板界面组织分析[J]. 稀有金属材料与工程, 2008, 37(增刊4): 634-637. Wu Jinping, Yang Yingli, Zhao Hengzhang, et al. Microstructure analysis of the explosive cladding interface of Nb/304L[J]. Rare Metal Materials and Engineering, 2008, 37(supplement 4): 634-637.
    [4] 李 鑫, 郑剑平, 赵 俊. Nb-1Zr合金与304不锈钢熔钎焊的接头特性[J]. 焊接学报, 2011, 32(3): 105-108. Li Xi, Zheng Jianping, Zhao Jun. Characteristics of welding-brazed joint between Nb-1Zr alloy and 304 stainless steel[J]. Transactions of the China Welding Institution, 2011, 32(3): 105-108.
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    [6] 马 雁. Nb-1Zr合金与不锈钢焊接结合层的研究[D]. 北京: 原子能研究院, 2003.
    [7] Serizawa H, Mori D, Shirai Y, et al. Weldability of dissimilar joint between F82H and SUS316L under fiber laser welding[J]. Fusion Engineering and Design, 2013, 88(9-10): 2466-2470.
    [8] 张英乔, 张汉谦, 赵四新, 等. 铌对高强结构钢大热输入焊接热影响区组织和性能的影响[J]. 焊接学报, 2008, 29(9): 96-100. Zhang Yingqiao, Zhang Hanqian, Zhao Sixin, et al. Effects of Nb on microstructure and toughness of high-strength structural steels heat affected zone at high heat input[J]. Transactions of the China Welding Institution, 2008, 29(9): 96-100.
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出版历程
  • 收稿日期:  2016-03-16

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