Study on refining effect of titanium element on regenerated 7050 aluminum alloy
The grain refinement of regenerated 7050 aluminum alloy ingots was experimen-tally studied with different Ti contents and holding time in the furnace after adding Ti.The results show that when the Ti content reaches 0.035％in 7050 aluminum alloy with recycled aluminum as the raw material,grains are most refined and the dendrites basically disappear.When it reaches 0.036％and holding time is no more than 2 hours,grains tend to coarsen slightly,while great coarsening will occur when holding time reaches or exceeds 3 hours.Af-ter adding Ti to the regenerated 7050 aluminum liquid,holding time should not exceed 2 hours,and rapid cooling should be conducted for casting.
7050 aluminum alloycast microstructureholding time
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