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郭民, 雷玉珍, 赵健, 宋晓国, 于治水, 石铭霄. Cu75Pt钎料钎焊Ti60与TC4接头界面组织及性能[J]. 焊接学报, 2022, 43(2): 40-44. DOI: 10.12073/j.hjxb.20210918001
引用本文: 郭民, 雷玉珍, 赵健, 宋晓国, 于治水, 石铭霄. Cu75Pt钎料钎焊Ti60与TC4接头界面组织及性能[J]. 焊接学报, 2022, 43(2): 40-44. DOI: 10.12073/j.hjxb.20210918001
GUO Min, LEI Yuzhen, ZHAO Jian, SONG Xiaoguo, YU Zhishui, SHI Mingxiao. Interfacial microstructure and mechanical property of Ti60 and TC4 joint brazed with Cu75Pt filler metal[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2022, 43(2): 40-44. DOI: 10.12073/j.hjxb.20210918001
Citation: GUO Min, LEI Yuzhen, ZHAO Jian, SONG Xiaoguo, YU Zhishui, SHI Mingxiao. Interfacial microstructure and mechanical property of Ti60 and TC4 joint brazed with Cu75Pt filler metal[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2022, 43(2): 40-44. DOI: 10.12073/j.hjxb.20210918001

Cu75Pt钎料钎焊Ti60与TC4接头界面组织及性能

Interfacial microstructure and mechanical property of Ti60 and TC4 joint brazed with Cu75Pt filler metal

  • 摘要: 采用Cu75Pt钎料实现了Ti60钛合金与TC4钛合金的真空钎焊,采用SEM,EDS,XRD分析了钎焊接头显微结构.结果表明,接头典型组织结构为Ti60/Ti2Cu + α-Ti/Ti2Cu/Ti2Cu + Ti3Pt/Ti2Cu/Ti2Cu + α-Ti/TC4.对不同钎焊温度下获得的接头界面组织结构进行了分析,结果表明,随着钎焊温度的增加,扩散反层厚度增加,钎缝中Ti2Cu和Ti3Pt金属间化合物减少,钎缝厚度逐渐减小.接头抗剪强度随钎焊温度的升高先增加后减小,当钎焊温度970 ℃,保温时间10 min时获得最大抗剪强度130.9 MPa.接头的断口分析表明,接头断裂在钎缝处,断裂方式为脆性断裂.

     

    Abstract: The Ti60 titanium alloy was successfully vacuum brazed with TC4 titanium alloy by using Cu75Pt filler metal. The microstructure of brazed joints was analyzed by scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and X-ray diffraction (XRD). The results showed that the typical microstructure of Ti60/Cu75Pt/TC4 joint was Ti60/Ti2Cu + α-Ti/Ti2Cu/Ti2Cu + Ti3Pt/Ti2Cu/Ti2Cu + α-Ti/TC4. The effect of different brazing temperatures on the interfacial microstructure and mechanical properties of joints was studied. The results revealed that with the increasing of brazing temperature, the thicknesses of diffusion layers were increased gradually. However, the Ti2Cu, Ti3Pt and the width of brazing seams were decreased. The shear strength of the joint increased first and then decreased with the increase of brazing temperature. The maximum shear strength of 130.9 MPa was obtained at the brazing temperature of 970 ℃ for 10min. The fracture analysis of the joint showed that the fracture mode is brittle fracture, which occurred in the center of brazing seam.

     

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