时效处理对锻态QAl10-5-5铝青铜组织与性能的影响  

Effects of Aging Treatment on Microstructure and Properties of Forged QA110-5-5 Aluminum Bronze

作　　者：龚习[1] 宋练鹏[1,2] 胡健[1] 王星[1] 

机构地区：[1]中南大学材料科学与工程学院,长沙410083 [2]中南大学有色金属材料科学与工程教育部重点实验室,长沙410083

出　　处：《机械工程材料》2012年第9期73-77,共5页Materials For Mechanical Engineering

摘　　要：通过硬度测试、拉伸性能测试、X射线衍射分析和显微组织观察等方法研究了时效处理对锻态QAl10-5-5铝青铜组织和性能的影响。结果表明:锻态QAl10-5-5铝青铜较好的时效处理工艺为650℃×2 h;在此工艺下,合金的硬度、抗拉强度、屈服强度、伸长率分别为212 HB,769 MPa,492 MPa和18.23%,与锻态合金的相比分别提高了8.16%,6.22%,12.33%和13.94%;经650℃×2 h时效后,基体α相和(α+γ_2)共析体组织分布均匀,合金中均匀析出了较多细颗粒状的κ相并弥散分布。Influences of aging treatment on microstructure and properties of forged QAll0-5-5 aluminum bronze were studied by hardness test, tensile test, X-ray diffraction analysis, microstructure observation. The results show that the aged QAll0 5-5 aluminum bronze exhibited fairly good mechanical properties when aging condition was 650 ℃×2 b. Under this aging condition, the hardness, tensile strength, yield strength and elongation of the aged alloy were 212 HB, 769 MPa, 492 MPa and 18.2% respectively, which were improved by 8. 16G, 6.22%, 12. 33% and 13. 94% respectively compared with those of the forged alloy, and more fine granular phase precipitated from alloy diffused well in the homogeneously distributed mierostructure of matrix of α-phase and （α＋γ2）euteetoid.

关 键 词：铝青铜 时效处理 显微组织 性能 

分 类 号：TG146.1[一般工业技术—材料科学与工程]