铝合金LD10-LF6搅拌摩擦焊的金属塑性流动

Metal flow behavier in friction stir welding of LF6 aluminum alloy and LD10 aluminum alloy

关键词:  搅拌摩擦焊  铝合金  金属塑性流动

Key words:  friction stir welding  aluminum alloy  metal flow

摘要:

通过对LF6/LD10进行搅拌摩擦焊(FSW)的工艺试验研究,分析了工艺参数对金属流动的影响。结果表明,当压入量和倾角大小适宜,采用带有螺纹的搅拌工具(Tool)时,能促进金属塑性流动;在一定范围内提高旋转速度或者焊接速度,不但能促进金属塑性流动,并且能使金属以涡形层状间混方式流动。当采用低速度参数,LF6铝合金处于前进侧时,涡形层状间混结构呈现均匀分布;LF6铝合金处于后退侧,则结果相反,但是提高旋转速度,不论LF6铝合金处于哪一侧,金属都能稳定流动。

Abstract:

Material flow in friction stir welding (FSW) of LF6 aluminum alloy and LD10 aluminum alloy was studied under different welding conditions. The research results showed that adequate plunge depth and push angle promote the metal plastic flow. The thread tool hardly affects metal flow in vertical direction. At the certain range, increasing spindle speed or welding speed of tool, vortex structures within welding zone appear to stable and well-distributed. When LF6 at retreating side, the combined interface of the two metals in low parameter is apparent, and the vortex structures had not been observed. By raising the parameters, when LF6 at advancing side, the vortex structure could be seen clearly regardless of whether the parameter are high or low.