Ti(C,N)-Al_2O_3与40Cr焊接界面组织与接头强度研究
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摘要
采用Cu73Ti27/Cu/Ag72Cu28非对称中间层,通过辅助脉冲电流液相扩散焊和常规钎焊,对Ti(C,N)-Al_2O_3陶瓷基复合材料和40 Cr钢进行了焊接试验,利用扫描电镜研究了焊接界面的微观组织及元素扩散行为.结果表明:辅助脉冲电流液相扩散焊可以减少焊缝中Cu-Ti金属间化合物的生成量,从而提高焊接接头的强度;液相区宽度随着焊接温度的提高而增加.而常规钎焊因为焊接温度较高,保温时间较长,易生成大量的Cu-Ti金属间化合物,降低了接头强度.
Ti( C,N)-Al_2O_3 ceramic matrix composite and 40 Cr steel were joined by Cu73Ti27 brazing alloy with the method of the auxiliary pulse current liquid phase diffusion welding and vacuum brazing. The scanning electronic microscope was employed to investigate the microstructure. The results show that the auxiliary pulse current liquid phase diffusion welding can reduce the content of Cu-Ti intermetallic compound in weld seam to improve the strength of joints. Meanwhile,the higher the temperature is,the wider the width of the molten zone will be. By contrast,vacuum brazing may produce more Cu-Ti intermetallic compound because its high temperature and long time to reduce the strength of joints.
Ti( C,N)-Al_2O_3 ceramic matrix composite and 40 Cr steel were joined by Cu73Ti27 brazing alloy with the method of the auxiliary pulse current liquid phase diffusion welding and vacuum brazing. The scanning electronic microscope was employed to investigate the microstructure. The results show that the auxiliary pulse current liquid phase diffusion welding can reduce the content of Cu-Ti intermetallic compound in weld seam to improve the strength of joints. Meanwhile,the higher the temperature is,the wider the width of the molten zone will be. By contrast,vacuum brazing may produce more Cu-Ti intermetallic compound because its high temperature and long time to reduce the strength of joints.
引文
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[3]郭沁涵.辅助脉冲电流扩散焊连接陶瓷基复合材料的界面行为[D].镇江:江苏科技大学,2015.
[4]吴铭方,于治水.Ag Cu Ti钎焊Al2O3/Nb的研究[J].华东船舶工业学院学报,2000,14(5):73-76.DOI:10.3969/j.issn.1673-4807.2000.05.017.WU Mingfang,YU Zhishui.Study on Ag Cu Ti brazing Al2O3/Nb[J].Journal of East China Shipbuilding Institute,2000,14(5):73-76.DOI:10.3969/j.issn.1673-4807.2000.05.017.(in Chinese)
[5]王全兆,刘越,张玉政,等.Ti C/Ni Cr金属陶瓷与1Cr13不锈钢的真空钎焊[J].焊接学报,2006,27(8):43-46.
[6]严铿,何旭丹,王清,等.铝合金活性TIG焊接接头性能研究[J].江苏科技大学学报(自然科学版),2014,28(2):131-134.DOI:10.3969/j.issn.1673-4807.2014.02.006.YAN Ken,HE Xudan,WANG Qing,et al.Study of joint properties of aluminum alloy a TIG welding[J].Journal of Jiangsu University of Science and Technology(Natural Science Edition),2014,28(2):131-134.DOI:10.3969/j.issn.1673-4807.2014.02.006.(in Chinese)
[7]邹贵生,吴爱萍,任家烈,等.Ti/Ni/Ti复合层TLP扩散连接Si3N4陶瓷结合机理[J].清华大学学报(自然科学版),2001,41(4/5):51-54.DOI:10.3321/j.issn:1000-0054.2001.04.013.ZOU Guisheng,WU Aiping,REN Jialie,et al.TLPdiffusion bonding mechanism of Si3N4ceramics with multiple Ti/Ni/Ti interlayers[J].Journal of Tsinghua University(Science and Technology),2001,41(4/5):51-54.DOI:10.3321/j.issn:1000-0054.2001.04.013.(in Chinese)
[8]LIU W P,ELSSNER G,RUHLE M.Effects of thin film Nb interlayer in Cu/sapphire bonds[J].Materials Science and Engineering A,2001,317(1):153-162.DOI:10.1016/S0921-5093(01)01158-3.
[9]卓然,冯吉才,曹健.自蔓延高温合成连接技术研究进展[J].宇航材料工艺,2004,34(3):1-5.DOI:10.3969/j.issn.1007-2330.2004.03.001.ZHUO Ran,FENG Jicai,CAO Jian.Progress in selfpropagating high-temperature synthesis joining[J].Aerospace Materials&Technology,2004,34(3):1-17.DOI:10.3969/j.issn.1007-2330.2004.03.001.(in Chinese)
[10]吴铭方,刘飞,王凤江,等.采用辅助脉冲电流液相扩散连接Ti(C,N)-Al2O3的接头形成行为及强度[J].焊接学报,2015,36(9):1-4.WU Mingfang,LIU Fei,WANG Fengjiang,et al.Joint formation behavior and joint strength of Ti(C,N)-Al2O3ceramic matrix composite bonded by liquid phase diffusion bonding with auxiliary pulse current[J].Transactions of the China Welding Institution,2015,36(9):1-4.(in Chinese)