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利用CS-1B型高压六面顶压机对近包晶点成分的Zn-2.75%Cu包晶合金分别进行2、4、6 GPa的高压凝固实验,对比研究了Zn-2.75%Cu合金在不同压力条件下获得的凝固组织。结果表明,与常压凝固相比,在超高压力条件下凝固的合金的显微组织形貌发生了很大的改变,但是合金的相组成没有发生变化;合金的高压凝固组织中初生ε相呈现枝晶状,与原始铸态组织相比,高压凝固合金组织中初生ε相体积分数明显增多,4 GPa时完整的羽毛状枝晶数量最多。
High-pressure solidification experiments of 2,4,6 GPa Zn-2.75% Cu peritectic alloys with near peritectic point were carried out by CS-1B high-pressure six-side-top press respectively. The effects of Zn-2.75% Solidified tissue obtained under pressure. The results show that compared with the normal pressure solidification, the microstructure of the alloy solidified under ultrahigh pressure has a great change, but the phase composition of the alloy has not changed; the high-pressure solidified alloy primary ε phase Showing dendritic shape. Compared with the original as-cast microstructure, the volume fraction of primary ε phase in high-pressure solidified alloy increased obviously, and the number of intact feathery dendrites at 4 GPa was the highest.