时效工艺对6082-T6板材弯曲性能的影响  

Effects of Aging Time and Temperature on the Bending Properties of 6082-T6Plate

作　　者：秦颐鸣 周文标 唐鑫[2] 王春霞[2] Qin Yiming;Zhou Wenbiao;Tang Xin;Wang Chunxia(Branch of Aluminum Processing, Baise Mining Group Co., Ltd;College of Materials Science and Engineering, Guilin University of Technology)

机构地区：[1]百色百矿集团有限公司铝业制造分公司 [2]桂林理工大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2018年第4期359-363,共5页Special Casting & Nonferrous Alloys

基　　金：广西有色金属及特色材料加工重点实验室基金资助项目(15KF-1)

摘　　要：研究了实际生产条件下时效工艺对6082-T6板材力学性能、弯曲性能以及时效析出相的影响,并分析了板材伸长率和弯曲性能之间的关系。结果表明,板材伸长率可表征板材的弯曲性能,δ=(t/2)(t/2+r)较好地表征了产生弯曲裂纹的临界伸长率δ、板材厚度t、弯曲半径r之间的关系;155℃×(4~16)h时效的板材表现出欠时效特征,时效析出相为GP区+细小的针状β″相,此时伸长率高达17%以上,弯曲性能较好。分别对实际生产条件下两种时效工艺(170℃×12h、155℃×12h)的6082-T6板材的力学性能进行了对比,发现在155℃×12h时效的各厚度板材伸长率均较高且弯曲性能较好,抗拉强度、屈服强度也均较高。Bending properties,tensile properties and hardening precipitates of 6082-T6 aluminum plates were investigated under production conditions,and the relation equation between tensile property and bending property was attempted to be established and verified.The results show that the plate bending property can be evaluated quantitively by the elongation,and the equation among critical elongation（δ）,plate thickness（t）and bending radius（r）followsδ=（t/2）（t/2＋r）.The higher elongation（17%）can be obtained by adopting the 155℃×（4-16）h under-aging process with the combination of clusters and finest need-likeβ″precipitates,resulting in the good plate bending property while keeping tensile properties.In addition,the tensile property data in 6082 plate production of two aging processes（170℃×12 h、155 ℃×12 h）was compared,and it was verified that the higher elongation and tensile strength could be obtained by adopting the 155 ℃×12 haging treatment.

关 键 词：6082合金 时效 裂纹 弯曲性能 伸长率 

分 类 号：TG166.3[金属学及工艺—热处理] TG146.21[金属学及工艺—金属学]