固溶前退火温度对2519A铝合金棒材织构的影响  

Effect of annealing temperature before solution treatment on texture evolution of 2519A aluminum alloy bar

作　　者：张新明[1] 匡小月[1] 李红萍[2] 叶凌英[1] 唐建国[1] 刘军[1] 

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083 [2]中国商飞上海飞机设计研究院,上海200232

出　　处：《材料热处理学报》2011年第9期83-88,共6页Transactions of Materials and Heat Treatment

基　　金：国家重点基础研究发展规划项目(2005CB623700)

摘　　要：通过固溶前退火温度来调控2519A铝合金棒材固溶时的再结晶状态,以获得不同织构组态。采用X射线衍射分析研究了2519A铝合金棒材经150、200、300和350℃退火1 h后再经535℃×2 h固溶与直接经535℃×2 h固溶4种热处理工艺对合金织构和微观组织的影响。结果表明:2519A铝合金棒材直接经535℃×2 h固溶,挤压棒材强的〈13〉织构转变为〈110〉再结晶织构,而经上述4种温度退火和535℃×2 h固溶,织构分别演变为〈113〉,〈605〉,〈5110〉和〈7 214〉织构。退火后不固溶试样〈111〉织构和硬度值都保持不变。样品固溶发生再结晶的〈110〉织构与挤压〈13〉织构间可用40°〈111〉长大理论解释。Annealing treatment of different temperatures before solution treatment were employed to control the recrystallization of the extruded 2519A aluminum alloy bar with 〈13〉texture before solution,in order to obtain different configurations of texture.The evolution of texture and microstructure of the samples annealed at 150,200,300 and 350 ℃ for 1 h and then solutioned at 535 ℃ for 2 h,compared with those solutioned at 535 ℃ for 2 h only,were investigated by X-ray diffraction and optical microscopy.The results indicate that the 〈13〉 texture in the 2519A aluminum alloy bar changes to the 〈110〉recrystallization texture after solution treatment at 535 ℃ for 2 h,while after annealing at 150,200,300 and 350 ℃ and then the solution treatment,it changes into 〈113〉,〈605〉,〈5 110〉 and 〈7 214〉texture,repectively.Besides,the 〈13〉texture and microhardness remains stable during the annealing before solution treatment.The relationship between the extruding 〈13〉texture and recrystallization〈110〉 texture after soulution of the samples can be explained by the 40°〈111〉growth theory.

关 键 词：2519A铝合金 织构 固溶 回复 

分 类 号：TG146.2[一般工业技术—材料科学与工程]