激光功率对TiB_2增强铝基复合材料焊接接头的影响
|
摘要
采用脉冲激光器对厚度为2 mm的Ti B2增强铝基复合材料进行了焊接性试验,分析激光功率对焊缝成形及组织的影响。结果表明:激光功率对焊缝成形的影响较大,随着激光功率的增加,脉冲激光焊接模式由热导焊接转变为深熔焊接模式,焊缝的熔深和熔宽也随着增加,焊缝成形系数由4.19减小到0.997。当激光功率增大到5.5 k W时焊接材料被激光熔透。当激光功率为6 k W时,焊缝区域平均显微硬度值达到最大,为110.4 HV,远高于母材的硬度值,主要是由于焊缝区域弥散分布的Ti B2导致。在合适的激光功率作用下,可以获得成形良好的铝基复合材料激光焊接接头。
Pulsed laser processing technology was used to weld Ti B2 enhanced Al matrix composites with 2 mm thickness. The effects of laser power on the weld formation and microstructure were investigated. The results show that the effect of laser power on the weld forming is relatively large. The penetration and width of the welded joints increase, and the pulsed laser weld model is changed from thermal condution to penetrated weld model while the laser power increases. The coefficient of weld forming changes from 4.19 to 0.997. The base metal is fully penetrated when the laser power is 5.5 k W.The hardness of the fusion zone reaches 110.4 HV, when the laser power is 6 k W. It is much higher than that of base metal,because of Ti B2 diffusion distribution in weld seam zone. The fine weld seam formation Al matrix composite welded joints can be obtained under appropriate laser power.
Pulsed laser processing technology was used to weld Ti B2 enhanced Al matrix composites with 2 mm thickness. The effects of laser power on the weld formation and microstructure were investigated. The results show that the effect of laser power on the weld forming is relatively large. The penetration and width of the welded joints increase, and the pulsed laser weld model is changed from thermal condution to penetrated weld model while the laser power increases. The coefficient of weld forming changes from 4.19 to 0.997. The base metal is fully penetrated when the laser power is 5.5 k W.The hardness of the fusion zone reaches 110.4 HV, when the laser power is 6 k W. It is much higher than that of base metal,because of Ti B2 diffusion distribution in weld seam zone. The fine weld seam formation Al matrix composite welded joints can be obtained under appropriate laser power.
引文
[1]巩建国,唐彬彬,韩丽.铝基复合材料研究现状[J].热加工工艺,2014,43(4):23-26.
[2]张文毓.铝基复合材料国内外技术水平及应用现状[J].航空制造技术,2015(3):82-86.
[3]刘金合,胡美娟,王辉.Si C颗粒增强铝基复合材料的真空电子束焊接[J].核技术,2006,29(2):133-135.
[4]牛济泰,刘黎明,田艳红.脉冲激光在Si Cw/6061Al铝基复合材料焊接中的应用[J].应用激光,1999,19(1):1-3.
[5]陈希章,雷玉成,李贤,等.Ti-Si对Si Cp/Al基复合材料等离子弧原位焊接性能的影响[J].焊接学报,2007,28(11):13-16.
[6]陈艳,唐前鹏,王孟君.Si Cp/6061Al复合材料激光焊接焊后热处理[J].热加工工艺,2007,36(11):93-93.
[7]王少刚,徐九华,姜澄宇.铝基复合材料焊接中的若干技术问题[J].宇航材料工艺,2006(4):1-6.
[8]崔海超.ZL101/Ti B2复合材料激光焊接性及Ti B2粒子行为研究[J].焊接学报,2012(6):8-10.
[9]陈彦宾.现代激光焊接技术[M].北京:科学出版社,2005:64-68.
[10]陈武柱.激光焊接与切割质量控制[M].北京:机械工业出版社,2010:71-72.
[11]陈武柱,张旭东,任家烈.激光焊接时焊接模式转变规律及焊接过程稳定型的研究[J].中国激光,1996,23(7):657-661.
[2]张文毓.铝基复合材料国内外技术水平及应用现状[J].航空制造技术,2015(3):82-86.
[3]刘金合,胡美娟,王辉.Si C颗粒增强铝基复合材料的真空电子束焊接[J].核技术,2006,29(2):133-135.
[4]牛济泰,刘黎明,田艳红.脉冲激光在Si Cw/6061Al铝基复合材料焊接中的应用[J].应用激光,1999,19(1):1-3.
[5]陈希章,雷玉成,李贤,等.Ti-Si对Si Cp/Al基复合材料等离子弧原位焊接性能的影响[J].焊接学报,2007,28(11):13-16.
[6]陈艳,唐前鹏,王孟君.Si Cp/6061Al复合材料激光焊接焊后热处理[J].热加工工艺,2007,36(11):93-93.
[7]王少刚,徐九华,姜澄宇.铝基复合材料焊接中的若干技术问题[J].宇航材料工艺,2006(4):1-6.
[8]崔海超.ZL101/Ti B2复合材料激光焊接性及Ti B2粒子行为研究[J].焊接学报,2012(6):8-10.
[9]陈彦宾.现代激光焊接技术[M].北京:科学出版社,2005:64-68.
[10]陈武柱.激光焊接与切割质量控制[M].北京:机械工业出版社,2010:71-72.
[11]陈武柱,张旭东,任家烈.激光焊接时焊接模式转变规律及焊接过程稳定型的研究[J].中国激光,1996,23(7):657-661.