高铁钢轨闪光焊接过烧缺陷的控制研究
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摘要
介绍了高速铁路钢轨焊接过烧缺陷的危害,从宏观样貌、微观电镜图像、能谱分析等方面对高铁钢轨闪光焊接过烧缺陷样本进行了分析。基于闪光焊接工艺参数进行了焊接试验,进而确认能够控制与避免高铁钢轨闪光焊接过烧缺陷的工艺参数。
The hazards of over-burning defects during welding of high-speed railway rail were introduced. The samples of high-speed railway rail with over-burning defects during flash welding were analyzed frommacroscopic appearance,micro-electron microscopy image and energy spectrumanalysis. The welding test was carried out based on the flash welding process parameters,and the process parameters capable of controlling and avoiding the over-burning defects of the high-speed railway rail during flash welding were confirmed.
The hazards of over-burning defects during welding of high-speed railway rail were introduced. The samples of high-speed railway rail with over-burning defects during flash welding were analyzed frommacroscopic appearance,micro-electron microscopy image and energy spectrumanalysis. The welding test was carried out based on the flash welding process parameters,and the process parameters capable of controlling and avoiding the over-burning defects of the high-speed railway rail during flash welding were confirmed.
引文
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[2]张建新,郭俊文.钢轨接触焊灰斑的生成及减少方法[J].铁道建筑,2005(8):39-41.
[3]杨其全,邹定强,胡杰.灰斑夹杂引起的钢轨闪光焊接头伤损研究[J].中国铁路,2011(6):65-67,77.
[4]戴虹,向俊杰,陶然.合金钢轨闪光焊灰斑缺陷研究[J].西南交通大学学报,1997,32(3):336-340.
[5]王振强,朱峰,杨华,等. GAAS80焊机和U71Mn钢轨的焊接工艺试验[J].铁道技术监督,2014,42(11):32-36.
[6]徐福中.高速钢工具热加工所造成的过热、过烧显微组织的形貌特征[J].工具技术,1985,22(8):18-20.
[7]张全新. 3Cr20Ni11Mo2PB钢气阀断裂原因分析[J].理化检验(物理分册),2013,49(2):127-129.
[8]黎伟.钢轨焊后双中频感应加热工艺研究[J].制造技术与机床,2017(8):100-103.