固溶时效处理对99.0Au-0.8Ti-0.2Y合金组织与硬度的影响  

Effect of solid solution and aging treatment on microstructure and hardness of 99.0Au-0.8Ti-0.2Y alloy

作　　者：张荣红[1] 兰艳頔[1] 彭先华[2] 刘静[2] 

机构地区：[1]中国地质大学珠宝学院,湖北武汉430074 [2]武汉科技大学材料与冶金学院,湖北武汉430081

出　　处：《金属热处理》2012年第3期111-113,共3页Heat Treatment of Metals

基　　金：中央高校基本科研业务费专项资金项目(CUG090111)

摘　　要：利用XRD,光学显微镜,TEM和显微硬度计对99.0Au-0.8Ti-0.2Y合金的强化机理进行了研究。结果表明,99.0Au-0.8Ti-0.2Y合金在800℃×15 min固溶+140℃×18 h时效处理后的显微硬度达到最高值74 HV0.05;TEM分析结果表明,固溶时效处理后晶粒内部细小而弥散分布的颗粒为TiAu4、YAu3以及它们的复合析出物。Strengthening mechanism of 99.0Au-0.8Ti-0.2Y alloy was investigated by XRD,optical microscope,TEM and microhardness tester.The results show that the microhardness of 99.0Au-0.8Ti-0.2Y alloy reaches the maximum value 74 HV0.05 after 800 ℃×15 min solution treatment and 140 ℃×18 h aging.TEM analysis results show that after solid solution and aging treatment,the fine and dispersed particles in the grain are TiAu4,YAu3 and their composite precipitates.

关 键 词：99.0Au-0.8Ti-0.2Y合金 固溶时效处理 组织 硬度 

分 类 号：TG156.1[金属学及工艺—热处理]