【摘要】 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时球化效果最好更多还原

【Abstract】 It is discussed in this paper that the ZA27 alloy is modified by Al Ti alloy together wit B salt. Then the alloy is heated to reach liquid solid zone and heat treated at different temperature with different time durations. The evolution pattern of structure of semi solid ZA27 alloy is studied. The result shows that the modified alloy at liquid solid zone, when heat treated at 460 ℃(or 470 ℃) with 30 60 min, will gain a round semi solid structure,while at 460 ℃ with 60 min, the structure is the best. [WT4”HZ]更多还原