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Ti3Al/Ti/Ti2AlNb扩散连接工艺及性能

魏红梅, 李万青, 何鹏, 高丽娇, 林铁松

魏红梅, 李万青, 何鹏, 高丽娇, 林铁松. Ti3Al/Ti/Ti2AlNb扩散连接工艺及性能[J]. 焊接学报, 2015, 36(4): 5-8,70.
引用本文: 魏红梅, 李万青, 何鹏, 高丽娇, 林铁松. Ti3Al/Ti/Ti2AlNb扩散连接工艺及性能[J]. 焊接学报, 2015, 36(4): 5-8,70.
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WEI Hongmei, LI Wanqing, HE Peng, GAO Lijiao, LIN Tiesong. Technology and properties of Ti3Al/Ti/Ti2AlNb diffusion welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2015, 36(4): 5-8,70.
Citation: WEI Hongmei, LI Wanqing, HE Peng, GAO Lijiao, LIN Tiesong. Technology and properties of Ti3Al/Ti/Ti2AlNb diffusion welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2015, 36(4): 5-8,70.
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Ti3Al/Ti/Ti2AlNb扩散连接工艺及性能

  • 1.

    哈尔滨工业大学先进焊接与连接国家重点实验室, 哈尔滨 150001

  • 2.

    哈尔滨工业大学先进焊接与连接国家重点实验室, 哈尔滨 150001;北京航空材料研究院, 北京 100095

  • 3.

    哈尔滨工业大学先进焊接与连接国家重点实验室, 哈尔滨 150001;北京星航机电装备有限公司, 北京 100074

基金项目: 国家自然科学基金资助项目(51275135,51305102);高等学校博士学科点专项科研基金优先发展领域课题资助项目(20112302130005)

Technology and properties of Ti3Al/Ti/Ti2AlNb diffusion welding

  • 1.

    State Key Laboratory of Advanced Welding and Joining, Harbin institute of Technology, Harbin 150001, China

  • 2.

    State Key Laboratory of Advanced Welding and Joining, Harbin institute of Technology, Harbin 150001, China;Beijing Institute of Aeronautical Materials, Beijing 100095, China

  • 3.

    State Key Laboratory of Advanced Welding and Joining, Harbin institute of Technology, Harbin 150001, China;Beijing Xinghang Mechanical and Electrical Equipment Co., Ltd., Beijing 100074, China

摘要

    摘要
  • 摘要: 采用钛箔作为中间层扩散连接Ti3Al与Ti2AlNb,利用SEM,EDS和XRD等分析方法发现,接头界面组织结构为Ti3Al/α+β双相组织/富B2相/Ti2AlNb.分别研究了中间层厚度,连接温度,保温时间等工艺参数对接头界面组织形貌以及力学性能的影响.结果表明,当钛箔厚度10μm,T=900℃,t=120 min,p=5 MPa时,接头组织性能最佳.钛箔厚度增加会导致Ti,Al,Nb等元素扩散不均匀;Ti3Al/Ti2AlNb直接固相扩散连接温度为1000℃,加入钛中间层可将其降低至900℃,减小了高温热循环对母材性能的损伤,接头整体抗拉强度从795 MPa提升至906 MPa;保温时间90~120 min可保证扩散充分连接可靠.
    Abstract: Ti3Al and Ti2AlNb alloy were connected by diffusion bonding with Ti foil as interlayer. Through a number of analysis methods such as SEM, EDS and XRD, it was discovered that the typical interface structure of Ti3Al/Ti/Ti2AlNb joint was Ti3Al/α-phase +β-phase/B2-rich phase/Ti2AlNb. The effect of process parameters, including thickness of interface layer, bonding temperature and holding time, on the interface morphology and property of the joint was investigated. The results show that when the thickness of Ti foil was 10μm, bonding temperature was 900℃ and holding time was 120 min, the resultant Ti3Al/Ti/Ti2AlNb joint had the optimized microstructure and properties. Increasing the foil thickness caused uneven diffusion of Ti, Al and Nb. The direct bonding temperature of Ti3Al/Ti2AlNb was 1000℃, the addition of Ti foil interlayer could reduce the bonding temperature to 900℃. So the damage of high temperature thermal cycling to Ti3Al alloy was decreased. The tensile strength of the joint increased from 795 MPa to 906 MPa. The holding time from 90 min to 120 min could ensure sufficient diffusion and reliable connection.
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    • 参考文献(12)
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  • 收稿日期:  2013-11-04

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