摘要
通过对Mg-8.8Gd-3.5Y-1.5Nd-0.5Zr合金进行热变形及时效热处理,研究了时效对该塑性变形镁合金的显微组织及力学性能的影响。结果表明,经热变形后的Mg-8.8Gd-3.5Y-1.5Nd-0.5Zr合金,晶粒细化效果明显。变形后进行时效处理,合金硬度显著增加,由变形态硬度53.68 HRB上升到64～71 HRB,上升了10%～31%;时效温度由200℃上升到250℃,峰值硬度随之降低,合金达到峰值硬度的时间缩短。最佳时效工艺为200℃×16 h,此时组织细密,弥散度及性能最好,合金获得最高的峰值硬度（70.57 HRB）。
Thermal deformation and aging treatment were carded on Mg-8.8Gd-3.5Y-1.5Nd-0.5Zr alloy. The influences of aging on the microstructure and mechanical properties of the deformed alloy were investigated. The results show that the grain size can be refined after thermal deformation. Aging treatment after deformation, the alloy hardness increases significantly from 53.68 HRB of the deformed to 64-71 HRB of the aging, which increases by 10%-31%. With aging temperature increased from 200℃ to 250 ℃, the peak hardness decreases gradually, and the time when hardness reaches peak is shortened. The best aging process is aging treatment at 200℃for 16 h, when the microstructure is fine, and the dispersity and mechanical properties perform are best. The alloy obtains the highest peak hardness （70.57 HRB）.
出处
《热加工工艺》
CSCD
北大核心
2015年第8期223-226,共4页
Hot Working Technology
基金
973先期(2012CB626808)
