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封小松, 陈树海, 李俐群, 陈彦宾. 铝/钛异种合金激光熔钎焊接头温度分布[J]. 焊接学报, 2009, (10): 9-12,16.
引用本文: 封小松, 陈树海, 李俐群, 陈彦宾. 铝/钛异种合金激光熔钎焊接头温度分布[J]. 焊接学报, 2009, (10): 9-12,16.
FENG Xiaosong, CHEN Shuhai, LI Liqun, CHEN Yanbin. Temperature distribution of Al/Ti dissimilar alloys joint in laser welding-brazing[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2009, (10): 9-12,16.
Citation: FENG Xiaosong, CHEN Shuhai, LI Liqun, CHEN Yanbin. Temperature distribution of Al/Ti dissimilar alloys joint in laser welding-brazing[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2009, (10): 9-12,16.

铝/钛异种合金激光熔钎焊接头温度分布

Temperature distribution of Al/Ti dissimilar alloys joint in laser welding-brazing

  • 摘要: 以5A06铝合金和TC4钛合金为母材,AlSi12焊丝为填充材料,进行了激光熔钎焊试验.在分析激光填丝熔钎焊传热行为的基础上,建立了3种激光加热模式的热源模型,并采用有限元方法对激光垂直加热、倾斜加热、光束偏置加热以及矩形光斑加热模式下接头温度场进行了计算和分析.结果表明,在铝/钛异种合金的激光熔钎焊过程中,焊缝两侧温度分布严重不对称,将光斑中心向铝合金一侧偏离焊缝中心线0.4~0.6mm可避免钛合金界面局部过热;采用椭圆光斑加热时,加热效果与圆形光斑相近;采用矩形光斑加热,接头界面上下温度分布较为均匀.

     

    Abstract: Laser welding-brazing experiments of 5A06 and TC4 were carried out and AlSi12 was used as filler metal.The heat transfer in the process was analyzed and the three heat source models were established.With the heating of laser vertical beam, declining beam, off-center beam and rectangular beam, the joint temperature field of Al/Ti dissimilar alloys was calculated and analyzed by finite element method.The simulated results indicate that the temperature distribution is dissymmetrical obviously on the two sides of the seam.It can avoid the local overheating at the interface of titanium alloy that the laser spot center deviation from the seam centerline to aluminum base metal side is 0.40.6 mm.With elliptical spot heating, the temperature history of the joint is similar with the situation of circle spot heating, and with rectangular spot heating, the temperature difference between the joint!interface upper part and bottom is reduced.

     

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