The results show that the weldments made from those metals in as-welded condition are instable in dimension and the rate of dimensional change decreases with time.
结果表明：七种材料的焊件都存在着尺寸不稳定，这种尺寸不稳定变形随时间的变化速率逐渐变缓；
It is shown that under suitable welding condition, the alloy can be welded well by using TIG arc welding and the welding wire having the same composition as the alloy.
结果表明，在一定的焊接工艺条件下，使用钨极氩弧焊和与母材同质的焊丝，可以对ZA12材料进行有效的焊接。
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