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PM-TZM钼合金电子束焊接特性

张永赟1,王廷1,2,李宁1,张秉刚2,冯吉才1,2

张永赟1,王廷1,2,李宁1,张秉刚2,冯吉才1,2. PM-TZM钼合金电子束焊接特性[J]. 焊接学报, 2018, 39(3): 57-60. DOI: 10.12073/j.hjxb.2018390068
引用本文: 张永赟1,王廷1,2,李宁1,张秉刚2,冯吉才1,2. PM-TZM钼合金电子束焊接特性[J]. 焊接学报, 2018, 39(3): 57-60. DOI: 10.12073/j.hjxb.2018390068
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ZHANG Yongyun1, WANG Ting1,2, LI Ning1, ZHANG Binggang2, FENG Jicai1,2. Weldability of PM-TZM alloy using electron beam welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(3): 57-60. DOI: 10.12073/j.hjxb.2018390068
Citation: ZHANG Yongyun1, WANG Ting1,2, LI Ning1, ZHANG Binggang2, FENG Jicai1,2. Weldability of PM-TZM alloy using electron beam welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(3): 57-60. DOI: 10.12073/j.hjxb.2018390068
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PM-TZM钼合金电子束焊接特性

Weldability of PM-TZM alloy using electron beam welding

摘要

    摘要
  • 摘要: 为研究PM-TZM钼合金电子束焊接特性，对其进行了电子束焊接试验，分别对接头显微组织及力学性能进行了分析. 结果表明，PM-TZM钼合金电子束焊缝呈“钉状”几何特征，熔合线附近有链状气孔出现. 焊缝区由粗大的等轴晶及柱状晶组成，热影响区晶粒相比于母材明显长大. 接头各区域硬度值不同，焊缝区硬度与母材相当，硬度最低值出现在两侧热影响区.PM-TZM合金电子束焊接接头有较大的性能损失. 接头室温最高抗拉强度378 MPa，为母材抗拉强度的47%，1 000℃抗拉强度168 MPa. 接头拉伸断裂均发生于焊缝区，呈典型的脆性解理断裂特征.
    Abstract: Weldability of PM-TZM molybdenum alloy using electron beam welding (EBW) was investigated in this study. EBW experiments on PM-TZM plates were carried out and microstructure and mechanical properties of the welded joints were analyzed. The results showed that the cross section of the weld zone (WZ) had a nail-like shape with the welding pores distributed along the fusion line. The WZ was composed of the coarsened equiaxed grains and columnar grains. The grains in heat affected zone were coarser than those in matrix area. Microhardness of joint presented an uneven distribution where the microhardness of the WZ was at the same level compared with the BM and the HAZ had the lowest microhardness. The tensile strength of the joint reduced sharply after welding compared to the BM that the room temperature tensile strength of the joint was 378 MPa which was 47% of BM. Tensile strength of the joint performed at 1 000 ℃ was 168 MPa. The tensile test fracture located at WZ and the weld fracture presented characteristics of cleavage fracture.
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  • [1] 韩桂海, 赵洪运, 付 伟, 等. 钎焊时间对TZM合金与ZrCp-W复合材料接头界面组织及性能的影响[J]. 焊接学报, 2017, 38(1): 69-72.Han Guihai, Zhao Hongyun, Fu Wei,et al. Effect of holding time on interfacial microstructure and properties of TZM/ZrCp-W brazed joints[J]. Transactions of the China Welding Institution, 2017, 38(1): 69-72.[2] Sharma I G, Chakraborty S P, Suri A K. Preparation of TZM alloy by aluminothermic smelting and its characterization[J]. Journal of Alloys & Compounds, 2005, 393(1-2): 122-127.[3] Miller M K, Bryhan A J. Effect of Zr, B and C additions on the ductility of molybdenum[J]. Materials Science & Engineering A, 2002, 327(1): 80-83.[4] Matsuda F, Ushio M, Nakata K. Weldability of molybdenum and its alloy sheet[J]. Transactions of JWRI, 1980(9): 69-78.[5] Liu P, Feng K Y, Zhang G M. A novel study on laser lap welding of refractory alloy 50Mo-50Re of small-scale thin sheet[J]. Vacuum, 2017, 136: 10-13.[6] Song X G, Tian X, Zhao H Y,et al. Interfacial microstructure and joining properties of titanium-zirconium-molybdenum alloy joints brazed using Ti-28Ni eutectic brazing alloy[J]. Materials Science & Engineering A, 2016, 653: 115-121.[7] 冯吉才, 王 廷, 张秉刚, 等. 异种材料真空电子束焊接研究现状分析[J]. 焊接学报, 2009, 30(10): 108-112.Feng Jicai, Wang Ting, Zhang Binggang,et al. Research status analysis of electron beam welding for joining of dissimilar materials[J]. Transactions of the China Welding Institution, 2009, 30(10): 108-112.[8] 罗 怡, 刘金合, 叶 宏, 等. AZ61镁合金真空电子束焊接温度场数值模拟[J]. 焊接学报, 2009, 30(3): 73-76.Luo Yi, Liu Jinhe, Ye Hong,et al. Numerical simulation on temperature field of electron beam welding of AZ61 magnesium alloy[J]. Transactions of the China Welding Institution, 2009, 30(3): 73-76.[9] Chatterjee A, Kumar S, Tewari R,et al. Welding of Mo-based alloy using electron beam and laser-GTAW hybrid welding techniques[J]. Metallurgical & Materials Transactions A, 2015, 47(3): 1-10.
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  • 收稿日期:  2016-05-15

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