(四川聯(lián)合大學(xué)金屬材料系, 成都 610065)
摘 要: 研究了過飽和ZA27的尺寸變化規(guī)律及其與組織轉(zhuǎn)變的關(guān)系。過飽和ZA27在80 ℃時(shí)效過程中發(fā)生迅速而明顯的尺寸收縮現(xiàn)象, 其收縮率高達(dá)0.30%左右，隨后尺寸變化很小。 銅加劇尺寸收縮。 η相(鋅相)和ε相(CuZn4)從過飽和固溶體中迅速脫溶是造成尺寸收縮的原因。
關(guān)鍵字: 鋅基合金 尺寸穩(wěn)定性 相轉(zhuǎn)變
（Department of Metallic Materials, Sichuan Union University, Chengdu 610065, P . R. China）
Abstract:It was found that the dimensions of supersaturated ZA27 reduced quickly and obviously during ageing at 80 ℃, and copper enhanced the shrinkage phenomenon. The dimensional shrinkage which occurred during ageing was due to the quick decomposition of η(Zn phases) and ε(CuZn4 phases) from supersaturated solid solution.
Key words: Zn base alloys dimensional stability phase tran sformation
