固溶时效对热轧态QAl10.9-5-5合金组织及性能的影响  

Influence of Solid Solution and Aging Treatment on Microstructure and Properties of Hot Rolled QAl10.9-5-5 Alloy

作　　者：王智祥[1] 潘少彬[1] 叶艳君[1] 刘峰 刘建辉[1] 

机构地区：[1]江西理工大学材料科学与工程学院,赣州341000 [2]宁波兴业盛泰集团有限公司,宁波315336

出　　处：《材料导报》2016年第16期82-85,共4页Materials Reports

摘　　要：采用OM、XRD等分别研究了850~980℃固溶、350~650℃时效工艺对热轧态QAl10.9-5-5合金的显微组织及力学性能的影响。结果表明：随着固溶温度的升高,热轧态QAl10.9-5-5合金中未溶的α、κ相逐步固溶到高温组织中,并在室温组织中以β′相出现,当固溶温度升至925℃时,合金基本为单一均匀的β′相组织,此时硬度达到最大值;在随后的时效过程中,随着时效温度的升高,原子扩散速率加快,细小的κ相不断从β′相中析出,并产生明显的沉淀强化作用;当时效温度为450℃,保温2h时,合金硬度值可达326HB;继续升高时效温度,合金中开始出现大量的α相,从而导致其硬度随之下降。综合比较,热轧态QAl10.9-5-5合金的较佳热处理工艺为925℃×1h固溶、450℃×2h时效。The effects of solid solution at 850-980 ℃ and aging treatment at 350-650 ℃ on the microstructure and mechanical properties of hot rolled QAl10.9-5-5alloy were investigated by OM,XRD,etc.The results showed that the undissolved phaseα,κof hot-rolled QAl10.9-5-5alloy gradually solved into high temperature microstructure with the increase of solid solution temperature,and appeared as the phaseβ′at room temperature.When the temperature of solid solution reached 925 ℃,the alloy was composed of single uniform phaseβ′,with the maximum hardness.In the subsequent aging process,the tiny phaseκprecipitated from phaseβ′constantly and generated obvious reinforcemen with the increase of aging temperature and the acceleration of diffusion rate.When the aging temperature was 450℃and holding time was 2h,the hardness value of alloy was up to 326 HB.When the aging temperature was rasied sequentially,a large number of phaseαincreasingly appeared in the alloy,which leaded to the decline of hardness.The preferred treatment process of hot-rolled QAl10.9-5-5alloy was solid solution treated at 925℃for 1h,aged at 450 ℃for 2h.

关 键 词：高铝青铜合金 固溶时效 组织及性能 

分 类 号：TB31[一般工业技术—材料科学与工程]