Effects of Two-Stage Solution Treatment on Microstructure and Mechanical Properties of 7A04 Aluminum Alloy
摘 要
对7A04铝合金进行了双级固溶+单级时效处理,采用正交试验研究了固溶温度和时间对该合金显微组织与力学性能的影响,得到了较优的双级固溶处理工艺。结果表明:优化的双级固溶处理工艺为450℃×30 min+505℃×60 min,采用该工艺固溶处理再经120℃×24h时效处理后,该铝合金的抗拉强度、屈服强度、伸长率和冲击功分别达到658.43MPa,593.07MPa,10.25%,9.681J;一级固溶是影响7A04铝合金力学性能的主要因素,而较高温度的二级固溶能使第二相、共晶夹杂物和金属间化合物大量溶入固溶体,并在随后的时效过程中以强化相的形式析出,进而改善合金的综合性能。
Abstract
A two-stage solution and aging treatment was conducted on 7A04 aluminum alloy, and then the effects of solution temperature and time on the microstructure and mechanical properties of the alloy were investigated by the orthogonal experiment. The optimal two-stage solution process was obtained. The results show that the optimal two-stage solution process was determined as: 450 ℃×30 min+505 ℃×60 min. Under this optimal process and followed by aging at 120 ℃ for 24 h, the tensile strength, yield strength, elongation and impact energy of the aluminum alloy reached 658.43 MPa, 593.07 MPa, 10.25% and 9.681 J, respectively. The first stage solution is the main influence factor on the mechanical properties of 7A04 aluminum alloy. However, the second stage solution at a relatively high temperature can remarkably improve the dissolution of the second phase, eutectic inclusions and intermetallic compounds, which precipitate as strengthening phases during the following aging treatment, and then results in the improvement of comprehensive performance of the alloy.
中图分类号 TG146.21 DOI 10.11973/jxgccl201704021
所属栏目 材料性能及应用
基金项目 广西壮族自治区教育厅“广西生态型铝产业协同创新中心”资助项目(XTCX002);广西理工科学实验中心项目(YXKT2014024);广西自治区八桂学者专项经费资助项目
收稿日期 2015/12/11
修改稿日期 2017/2/24
网络出版日期
作者单位点击查看
备注陈灵(1993-),男,江西赣州人,硕士研究生.
引用该论文: CHEN Ling,HE Huan,FU Yue-chun,SHEN Xiao-ming,WU Zhong-yi,ZENG Jian-min. Effects of Two-Stage Solution Treatment on Microstructure and Mechanical Properties of 7A04 Aluminum Alloy[J]. Materials for mechancial engineering, 2017, 41(4): 98~102
陈灵,何欢,符跃春,沈晓明,吴忠艺,曾建民. 双级固溶处理对7A04铝合金组织与力学性能的影响[J]. 机械工程材料, 2017, 41(4): 98~102
共有人对该论文发表了看法,其中:
人认为该论文很差
人认为该论文较差
人认为该论文一般
人认为该论文较好
人认为该论文很好
参考文献
【1】王涛, 尹志民.高强变形铝合金的研究现状和发展趋势[J].稀有金属, 2006, 30(2):197-202.
【2】刘静安.研制超高强铝合金材料的新技术及其发展趋势[J].铝加工, 2004(1):9-13.
【3】张永安, 熊柏青,韦强,等.喷射成形制备高性能铝合金材料[J].机械工程材料, 2001, 25(4):22-25.
【4】姚毅中, 陈小青.铝及铝合金在航空航天及军工工业中的应用[J].铝加工, 1993(2):13-18.
【5】JEFFERY B P.Structure and properties of spray formed 7150 containing Fe and Si[J].Inter JPM, 1998, 30(3):335-340.
【6】陈昌麒.超高强铝合金的发展[J].中国有色金属学报, 2002, 12(增1):22-27.
【7】郑大亮, 高鹏, 尹建成, 等.铝合金喷射沉积坯的形状控制及显微组织[J].机械工程材料, 2015, 39(8):22-25.
【2】刘静安.研制超高强铝合金材料的新技术及其发展趋势[J].铝加工, 2004(1):9-13.
【3】张永安, 熊柏青,韦强,等.喷射成形制备高性能铝合金材料[J].机械工程材料, 2001, 25(4):22-25.
【4】姚毅中, 陈小青.铝及铝合金在航空航天及军工工业中的应用[J].铝加工, 1993(2):13-18.
【5】JEFFERY B P.Structure and properties of spray formed 7150 containing Fe and Si[J].Inter JPM, 1998, 30(3):335-340.
【6】陈昌麒.超高强铝合金的发展[J].中国有色金属学报, 2002, 12(增1):22-27.
【7】郑大亮, 高鹏, 尹建成, 等.铝合金喷射沉积坯的形状控制及显微组织[J].机械工程材料, 2015, 39(8):22-25.
相关信息