爱享文献_固溶处理对7150铝合金组织和力学性能的影响.pdf

第 20 卷第 6 期 中国有色金属学报 2010 年 6 月 Vol.20 No.6 The Chinese Journal of Nonferrous Metals June 2010 文章编号：1004-0609(2010)06-1095-07 固溶处理对7150 铝合金组织和力学性能的影响 韩小磊，熊柏青，张永安，李志辉，朱宝宏，王 锋，刘红伟 (北京有色金属研究总院 有色金属材料制备加工国家重点实验室，北京 100088) 摘 要：通过 OM、SEM、X 射线衍射、DSC 差热分析和室温拉伸性能测试，研究固溶处理对 7150 铝合金挤压 板带组织和力学性能的影响。结果表明：合金固溶处理温度越高，时间越长，粗大第二相溶解越多；合金在 480℃ 进行固溶处理时，出现过烧组织，双级固溶处理制度没有提高本合金开始出现过烧组织的温度；随着合金固溶处 理时间的延长，组织出现粗化和再结晶的趋势；本合金适合采用 475 ℃，2 h 的单级固溶制度，经(475 ℃，2 h) + (120 ℃，24 h)固溶−峰时效处理后，合金抗拉强度、屈服强度和伸长率分别为 650 MPa、600 MPa 和 13.5%。 关键词：7150 铝合金；固溶处理；显微组织；力学性能 中图分类号：TG113 ；TG146.2 文献标志码：A Effect of solution treatment on microstructures and mechanical properties of 7150 aluminum alloy HAN Xiao-lei, XIONG Bai-qing, ZHANG Yong-an, LI Zhi-hui, ZHU Bao-hong, WANG Feng, LIU Hong-wei (State Key Laboratory of Nonferrous Metals and Processes, General Research Institute for Nonferrous Metals, Beijing 100088, China) Abstract: The effects of solution treatment on the microstructures and mechanical properties of 7150 aluminum alloy extrusion plate were studied by OM, SEM, XRD, DSC and room temperature tensile test. The results show that the coarse second phase dissolves more adequately when the alloy is solution treated at higher temperature for longer time. The overheated structure appears in alloys when quenched at 480 ℃, and the temperature at which overheated structure appears cannot be enhanced by two-stage solution. The trend of microstructure coarsening and recrystallization appears with prolongating the solution time. The suited solution of the alloy is single-stage