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TC4/Ti60合金钎焊接头界面组织及力学性能

卞红1,田骁2,冯吉才1,高峰1,胡胜鹏1

卞红1,田骁2,冯吉才1,高峰1,胡胜鹏1. TC4/Ti60合金钎焊接头界面组织及力学性能[J]. 焊接学报, 2018, 39(5): 33-36，68. DOI: 10.12073/j.hjxb.2018390117
引用本文: 卞红1,田骁2,冯吉才1,高峰1,胡胜鹏1. TC4/Ti60合金钎焊接头界面组织及力学性能[J]. 焊接学报, 2018, 39(5): 33-36，68. DOI: 10.12073/j.hjxb.2018390117
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BIAN Hong1, TIAN Xiao2, FENG Jicai1, GAO Feng1, HU Shengpeng1. Interfacial microstructure and mechanical properties of TC4/Ti60 brazed joints[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(5): 33-36，68. DOI: 10.12073/j.hjxb.2018390117
Citation: BIAN Hong1, TIAN Xiao2, FENG Jicai1, GAO Feng1, HU Shengpeng1. Interfacial microstructure and mechanical properties of TC4/Ti60 brazed joints[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(5): 33-36，68. DOI: 10.12073/j.hjxb.2018390117
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TC4/Ti60合金钎焊接头界面组织及力学性能

Interfacial microstructure and mechanical properties of TC4/Ti60 brazed joints

摘要

    摘要
  • 摘要: 采用TiZrNiCu非晶钎料实现了TC4和Ti60异种钛合金的真空钎焊连接，利用扫描电子显微镜(SEM)、能谱仪(EDS)和X射线衍射仪(XRD)等分析手段研究了钎焊工艺参数对接头界面组织结构及力学性能的影响. 结果表明，TC4/TiZrNiCu/Ti60钎焊接头的典型界面结构为：TC4/α-Ti+β-Ti+(Ti,Zr)2(Ni,Cu)/Ti60. 随着钎焊温度升高或保温时间延长，片层状α+β相逐渐填充整条钎缝，(Ti,Zr)2(Ni,Cu)相含量减少且分布更加均匀. 接头室温抗拉强度随钎焊温度或保温时间的增加均先增大后减小，在990 ℃/10 min钎焊条件下所获接头抗拉强度达到最大为535.3 MPa. 断口分析结果表明，断裂位于钎缝中，断裂方式为脆性断裂.
    Abstract: TC4 alloy and Ti60 alloy were brazed using TiZrNiCu amorphous filler alloy. Effects of the brazing process parameters on the interfacial microstructure and mechanical properties of the joints were studied. The interfacial microstructure and possible phases of the joints, as well as the fracture form of fractures, were detected by scanning electron microscope(SEM), energy dispersive spectrometer(EDS) and X-ray diffraction(XRD). The results showed that the typical interfacial microstructure of TC4/Ti60 joint was TC4/α-Ti+β-Ti+(Ti,Zr)2(Ni,Cu)/Ti60. With increased brazing temperature or prolonged holding time, lamellar α+β microstructure filled the whole brazing seam gradually and (Ti,Zr)2(Ni,Cu) phase was distributed more evenly. With increasing of brazing temperature or holding time, tensile strength of the joints was first increased and then decreased. The highest tensile strength, 535.3 MPa, was obtained when the joints were brazed at 990 ℃ for 10 min. Fracture analysis indicated that the joints were fractured at brazing seam, which performed as brittle fracture.
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  • [1] Chang C T, Shiue R K. Infrared brazing Ti-6Al-4V and Mo using the Ti-15Cu-15Ni braze alloy[J]. International Journal of Refractory Metals and Hard Materials, 2005, 23(3): 161-170.[2] Chen H S, Liu X H, Liu G F,et al. Hot deformation behavior and processing map of Ti-6Al-3Nb-2Zr-1Mo titanium alloy[J]. Rare Metal Materials and Engineering, 2016, 45(4): 901-906.[3] 王 刚, 吴林志, 李 鑫, 等. TC4钛合金真空钎焊接头组织与高温性能[J]. 焊接学报, 2014, 35(6): 100-104.Wang Gang, Wu Linzhi, Li Xin,et al. Microstructure and high temperature properties of TC4 titanium alloy vacuum brazed joint[J]. Transactions of the China Welding Institution, 2014, 35(6): 100-104.[4] Ganjeh E, Sarkhosh H.Microstructural, mechanical and fracto-graphical study of titanium-CP and Ti-6Al-4V similar brazing with Ti-based filler[J]. Materials Science and Engineering: A, 2013, 559: 119-129.[5] 贾蔚菊, 曾卫东, 刘建荣, 等. Ti60高温钛合金氧化行为研究[J]. 稀有金属材料与工程, 2010, 39(5): 781-786.Jia Weiju, Zeng Weidong, Liu Jianrong,et al. Oxidation behavior of nearα-titanium alloy Ti60[J]. Rare Metal Materials and Engineering, 2010, 39(5): 781-786.[6] 魏寿庸, 石卫民, 王鼎春, 等. 600 ℃时高温钛合金(Ti60)的组织与力学性能[J]. 中国有色金属学报, 2010, 20(s1): 801-806.Wei Shouyong, Shi Weimin, Wang Dingchun,et al. Microstru-cture and mechanical properties of high temperature titanium alloy Ti60 at 600 ℃[J]. The Chinese Journal of Nonferrous Metals, 2010, 20(s1): 801-806.[7] 陈国庆, 张秉刚, 武振周, 等. TiAl/Ti60电子束焊接接头组织及性能[J]. 焊接学报, 2009, 30(12): 41-44.Chen Guoqing, Zhang Binggang, Wu Zhenzhou,et al. Microstru-cture and mechanical properties of electron beam welded dissimilar TiAl/Ti60 joint[J]. Transactions of the China Welding Institution, 2009, 30(12): 41-44.[8] 宋晓国, 曹 健, 李兆光, 等. TiZrNiCu钎料钎焊Ti53311S高温钛合金接头界面结构及性能[J]. 稀有金属材料与工程, 2013, 42(8): 1694-1699.Song Xiaoguo, Cao Jian, Li Zhaoguang,et al. Interracial microstructure and properties of Ti53311S titanium alloy joints brazed using TiZrNiCu filler metal[J]. Rare Metal Materials and Engineering, 2013, 42(8): 1694-1699.
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  • 收稿日期:  2017-07-11

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