本文選題：稀土鎂合金　切入點：退火溫度　出處：《中國稀土學報》2017年03期 　論文類型：期刊論文

【摘要】：通過熔煉鑄造及熱擠壓方法制備了Mg-13Gd-2Nd-2Cu(質量分數(shù))鎂合金。通過金相顯微鏡、掃描電鏡及能譜分析、維氏硬度、拉伸性能測試等方法,研究了Mg-13Gd-2Nd-2Cu合金的鑄態(tài)顯微組織特征及退火溫度對擠壓態(tài)合金的組織與力學性能影響。結果表明:退火熱處理促進了晶界處Mg5(GdNdCu)_1相充分溶入α-Mg基體中。提高退火溫度使基體晶粒發(fā)生再結晶長大,改變了Mg5(GdNdCu)_1相的形態(tài)和分布。當退火溫度超過500℃時,晶粒粗化并部分發(fā)生過燒現(xiàn)象。提高退火溫度,會使擠壓態(tài)合金的屈服強度有所降低。
[Abstract]:Mg-13Gd-2Nd-2Cu (mass fraction) magnesium alloy was prepared by melting casting and hot extrusion. The microstructure characteristics of as-cast Mg-13Gd-2Nd-2Cu alloy and the effect of annealing temperature on the microstructure and mechanical properties of extruded alloy were studied. The results showed that annealing heat treatment promoted the full dissolution of Mg5(GdNdCu)_1 phase into 偽 -Mg matrix at grain boundary, and the annealing temperature was raised. Recrystallization and growth of the matrix grain, The morphology and distribution of Mg5(GdNdCu)_1 phase were changed. When the annealing temperature was higher than 500 鈩，

本文編號：1646243