Composition segregation research of TA19 titanium alloy ingot
TA19 titanium ingots are manufactured using vacuum arc remelting(VAR).The composition segregation defects in φ700 mm ingot were studied under different conditions of melting rates and water-cooling flow.The smelting process and the mechanism of segregation were analyzed through a combination of physical experiments and finite element simulation.The results indicate that the shape of the melt pool significantly influences the composition distribution of the ingot:the lower the melting velocity,the shallower the melt pool depth and the segregation depth;the higher the water-cooled flow,the narrower the melt pool range and the segregation range.
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