GTi70与TC4异种钛合金材料激光焊缝组织与性能分析
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摘要
研究了GTi70与TC4异种钛合金材料激光焊接性能,通过接头常温、高温拉伸强度检测,焊缝组织XRD、OM、SEM检测分析,拉伸断口以及剪切断口形貌SEM分析,论证了异种材料的可焊性.试验结果显示,异种材料接头常温拉伸强度高于GTi70母材,500,600和750℃高温拉伸强度高于TC4母材,焊缝拉伸断口、剪切断口均为韧性断裂,两种材料激光焊接性能良好.脉冲激光焊缝组织更为细小,焊缝热影响区较窄,母材损伤小,焊缝强度与塑性优于连续激光焊缝.
This paper concentrates on the welding performance of GTi70 and TC4 dissimilar materials. The microstructure and mechanical properties of the welded joint with laser welding were investigated, which shows the weld ability of GTi70 and TC4.The micro structures and fracture morphologies of the welded joint were analyzed through OM,XRD and SEM, and the detailed analysis of tensile strength were performed. The results demonstrated that the tensile strength of welding joints were higher than GTi70 at room temperature, while the tensile strength was higher than TC4 at500, 600 and 750 °C. The tensile fracture and shear fracture of welded joint were plastic fractures. In addition, compared to continuous laser welding seam, the micro structure and mechanical properties of pulsed laser welding seam were better.
This paper concentrates on the welding performance of GTi70 and TC4 dissimilar materials. The microstructure and mechanical properties of the welded joint with laser welding were investigated, which shows the weld ability of GTi70 and TC4.The micro structures and fracture morphologies of the welded joint were analyzed through OM,XRD and SEM, and the detailed analysis of tensile strength were performed. The results demonstrated that the tensile strength of welding joints were higher than GTi70 at room temperature, while the tensile strength was higher than TC4 at500, 600 and 750 °C. The tensile fracture and shear fracture of welded joint were plastic fractures. In addition, compared to continuous laser welding seam, the micro structure and mechanical properties of pulsed laser welding seam were better.
引文
[1]蔡建明,李臻熙,马济民,等.航空发动机用600℃高温钛合金的研究与进展[J].材料导报,2005,19(1):50-53.Cai Jianming,Li Zhenxi,Ma Jimin,et al.Research and development of 600℃high temperature titanium alloys for aeroengine[J].Materials Review,2005,19(1):50-53.
[2]韩忠.钛合金焊接冶金研究进展[J].材料科学与工程,2000,18(4):107-110,120.Han Zhong.Advances in titanium alloy welding metallurgy[J].Materials Science and Engineering,2000,18(4):107-110,120.
[3]魏寿庸,何瑜,王青江,等.俄航空发动机用高温钛合金发展综述[J].航空发动机,2015,31(1):52-58.Wei Shouyong,He Yu,Wang Qingjiang,et al.Development of the aero-engine heat-resisting titanium alloys in russia[J].Aircraft Engine,2015,31(1):52-58.
[4]钱九红.航空航天用新型钛合金的研究发展及应用[J].稀有金属,2000,24(2):218-222.Qian Jiuhong.Application and development of new titanium alloys for aerospace[J].Chinese Journal of Rare Metals,2000,24(2):218-222.
[5]蔡建明,弭光宝,高帆,等.航空发动机用先进高温钛合金材料技术研究与发展[J].材料工程,2016,44(8):1-10.Cai Jianming,Mi Guangbao,Gao Fan,et al.Research and Development of Some Advanced High Temperature Titanium Alloys for Aero-engine[J].Journal of Materials Engineering,2016,44(8):1-10.
[6]邹世坤,汤昱,巩水利.钛合金薄板激光焊接技术研究[J].焊接技术,2003,32(5):17-20.Zou Shikun,Tang Yu,Gong Shuili.Study on technology of laser welding titanium alloy sheets[J].Welding Technology,2003,32(5):17-20.
[7]姚伟,巩水利,陈俐.钛合金激光穿透焊的焊缝成形I[J].焊接学报,2004,25(4):119-122.Yao Wei,Gong Shuili,Chen Li.Research on weld shaping for laser fully penetration welding titanium alloy(Ⅰ)[J].Transactions of the China Welding Institution,2004,25(4):119-122.
[8]姚伟,巩水利,陈俐.钛合金激光穿透焊的焊缝成形II[J].焊接学报,2004,25(5):74-76.Yao Wei,Gong Shuili,Chen li.Weld shoping for laser fully penetrantion welding titanium alloy(II)[J].Transactions of the China Welding Institution,2004,25(5):74-76.
[9]邓安华.钛合金的马氏体相变[J].上海有色金属,1932,20(4):193200.Deng Anhua.Martensitic transformation of titanium alloy[J].Shanghai Nonferrous Metals,1932,20(4):193200.
[10]陶春虎.航空发动机用材料断裂分析及断口图谱[M].北京:国防工业出版社,2007.
[2]韩忠.钛合金焊接冶金研究进展[J].材料科学与工程,2000,18(4):107-110,120.Han Zhong.Advances in titanium alloy welding metallurgy[J].Materials Science and Engineering,2000,18(4):107-110,120.
[3]魏寿庸,何瑜,王青江,等.俄航空发动机用高温钛合金发展综述[J].航空发动机,2015,31(1):52-58.Wei Shouyong,He Yu,Wang Qingjiang,et al.Development of the aero-engine heat-resisting titanium alloys in russia[J].Aircraft Engine,2015,31(1):52-58.
[4]钱九红.航空航天用新型钛合金的研究发展及应用[J].稀有金属,2000,24(2):218-222.Qian Jiuhong.Application and development of new titanium alloys for aerospace[J].Chinese Journal of Rare Metals,2000,24(2):218-222.
[5]蔡建明,弭光宝,高帆,等.航空发动机用先进高温钛合金材料技术研究与发展[J].材料工程,2016,44(8):1-10.Cai Jianming,Mi Guangbao,Gao Fan,et al.Research and Development of Some Advanced High Temperature Titanium Alloys for Aero-engine[J].Journal of Materials Engineering,2016,44(8):1-10.
[6]邹世坤,汤昱,巩水利.钛合金薄板激光焊接技术研究[J].焊接技术,2003,32(5):17-20.Zou Shikun,Tang Yu,Gong Shuili.Study on technology of laser welding titanium alloy sheets[J].Welding Technology,2003,32(5):17-20.
[7]姚伟,巩水利,陈俐.钛合金激光穿透焊的焊缝成形I[J].焊接学报,2004,25(4):119-122.Yao Wei,Gong Shuili,Chen Li.Research on weld shaping for laser fully penetration welding titanium alloy(Ⅰ)[J].Transactions of the China Welding Institution,2004,25(4):119-122.
[8]姚伟,巩水利,陈俐.钛合金激光穿透焊的焊缝成形II[J].焊接学报,2004,25(5):74-76.Yao Wei,Gong Shuili,Chen li.Weld shoping for laser fully penetrantion welding titanium alloy(II)[J].Transactions of the China Welding Institution,2004,25(5):74-76.
[9]邓安华.钛合金的马氏体相变[J].上海有色金属,1932,20(4):193200.Deng Anhua.Martensitic transformation of titanium alloy[J].Shanghai Nonferrous Metals,1932,20(4):193200.
[10]陶春虎.航空发动机用材料断裂分析及断口图谱[M].北京:国防工业出版社,2007.