固溶压力对AM60镁合金组织和性能的影响  

Effect of solution pressure on microstructure and mechanical properties of AM60 alloy

作　　者：岳学庆[1] 鲁妍[1] 王红梅[1] 姬莉[1] 

机构地区：[1]秦皇岛职业技术学院机电工程系,河北秦皇岛066100

出　　处：《金属热处理》2012年第2期85-87,共3页Heat Treatment of Metals

基　　金：国家自然科学基金项目(No.50975247)

摘　　要：对铸态AM60镁合金在施加不同压力作用下(常压及3、4、5 GPa),450℃固溶处理40 min。使用金相显微镜和X射线衍射仪表征了合金的微观结构,采用显微硬度计和拉伸试验仪研究了合金的力学性能。结果表明,固溶压力的提高促进了合金中沿晶界网状分布的粗大β-Mg17Al12相的破裂并溶入到α-Mg基体。这种现象有利于合金的抗拉强度、伸长率和断面收缩率显著提高,而显微硬度有所下降。Solution treatment was carried out on as-cast AM60 magnesium alloy at 450 ℃ for 40 min under different pressures-atmospheric pressure,3,4 and 5 GPa respectively.Microstructure of the alloy was characterized by optical microscopy and X-ray diffractiometer.Mechanical properties of the alloy were investigated by micro-hardometer and tensile tester.The results show that increasing the solution pressure promotes the fracture and dissolution into the α-Mg matrix of the coarse β-Mg17Al12phase distributed along the grain boundaries with a network appearance.This phenomena are in favor of an obvious increase in the tensile strength,elongation and reduction of area,but a decrease in the microhardness.

关 键 词：镁合金 固溶压力 力学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]