热处理温度对高强变形铝青铜的组织和力学性能的影响  

Effect of Heat-Treatment Temperature on Microstructure and Mechanical Properties of High Strength Aluminum Bronze

作　　者：张大童[1] 陈瑞萍[1] 罗宗强[1] 张卫文[1] 李元元[1] 

机构地区：[1]华南理工大学机械与汽车工程学院,广东广州510640

出　　处：《稀有金属》2010年第4期521-525,共5页Chinese Journal of Rare Metals

基　　金：国家自然科学基金资助项目(50075026)

摘　　要：针对一种新型高强变形铝青铜合金,考察了淬火温度和回火温度对该合金的微观组织和力学性能的影响。研究结果表明,淬火温度越高,合金内部的β'马氏体相越多,材料的硬度越高,但淬火温度过高时,由于针片状α相的出现,使材料的强度和塑性有较大下降。试验合金适宜的淬火温度为900℃。淬火态材料经低温回火,强度可进一步提高,400℃回火时材料的强度和硬度达到峰值,此后随着回火温度的升高,材料的强度和硬度逐渐下降,延伸率逐渐提高。600℃回火态材料的抗拉强度和延伸率分别达到900 MPa和17%以上,具有优良的强韧配合。Effects of quench temperature and tempering temperature on the microstructures and mechanical properties of a high strength aluminum bronze prepared by hot extrusion were investigated.It was found that the volume of β martensite phase increased with the quench temperature increasing,hence the hardness of the specimen increased.However,needle-like α phase would form if the quench temperature was too high.Based on the experimental results,the temperature of 900 ℃ was chosen as the suitable tempera-ture for q...

关 键 词：高强变形铝青铜 热处理 组织 力学性能 

分 类 号：TG166[金属学及工艺—热处理]