退火工艺对5A02铝合金板材组织与性能的影响  

Influence of annealing process on microstructure and properties of 5A02 aluminum alloy sheet

作　　者：汪祥鹏[1] 陈忠家[1] 耿德远 张铧[1] 

机构地区：[1]合肥工业大学材料科学与工程学院,安徽合肥230009 [2]爱力特家电成套设备有限公司,安徽滁州239000

出　　处：《轻合金加工技术》2010年第7期35-38,52,共5页Light Alloy Fabrication Technology

基　　金：国家自然基金资助项目(10702018)

摘　　要：采用单向拉伸试验、金相显微分析和扫描电镜观察等手段,研究了退火工艺对5A02铝合金板材的力学性能、成形性能及显微组织的影响。试验结果表明,随着退火温度的上升、保温时间的延长,5A02铝合金板材抗拉强度略有下降,但是伸长率和应变硬化指数大幅提高。综合比较各种退火工艺后得出,在380℃退火90 min,材料的成形性能较优:抗拉强度为187.89 N/mm2,伸长率达到28.68%,应变硬化指数为0.33,屈强比为0.429。The effects of different annealing treatments on the mechanical and forming properties of 5A02 aluminum alloy sheets were investigated, and the corresponding micro- structures were examined through metallographic microscope and SEM. The results show that with increasing annealing temperature and holding time, the tensile strength of 5A02 alloy sheet decreases slightly, but its elongation and strain hardening exponent increases gradual- ly. The forming properties of the alloy achieve an optimal combination when it is annealed at 380℃ for 90min, with the parameters as follows： ultimate strength = 187.89 N/mm2, elon- gation = 28.68%, strain hardening index = 0.33, and tensile ratio = 0. 429.

关 键 词：5A02铝合金 退火工艺 显微组织 成形性能 

分 类 号：TG156.21[金属学及工艺—热处理]