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采用铝钛中间合金和硼盐联合使用对 ZA2 7合金进行变质处理 ,并加热到液 -固相区不同温度 ,采用不同时间进行等温热处理 ,以观察所获得的 ZA2 7合金半固态组织的演变规律 .结果表明 :经过变质处理后的合金在液 -固相区 46 0℃和 470℃保温 30～ 6 0 min可以获得较好的球化的半固态组织 ,其中在 46 0℃保温 6 0 min时球化效果最好
ZA2 7 alloy was modified by the combination of Al-Ti master alloy and boron salt and heated to different temperatures in the liquid-solid zone, and then isothermally treated at different times to observe the microstructure of the obtained ZA2 7 alloy The results show that the alloy with good metamorphism can be obtained at 46 0 ℃ after heat treatment at 46 0 ℃ for 60min and 470 ℃ for 30 ~ 60 min min when the ball effect is best