北京航空航天大学学报 ›› 2006, Vol. 32 ›› Issue (09): 1083-1086.

• 论文 • 上一篇    下一篇

新淬火状态铝合金板的成形极限

高宏志, 周贤宾   

  1. 北京航空航天大学 机械工程及自动化学院, 北京 100083
  • 收稿日期:2005-10-25 出版日期:2006-09-30 发布日期:2010-09-19
  • 作者简介:高宏志(1974-),男,河北蔚县人,博士生,gaohongzhi@yeah.net.
  • 基金资助:

    教育部博士点基金资助项目(20040006022)

Forming limits for as-quenched aluminum alloy sheet

Gao Hongzhi, Zhou Xianbin   

  1. School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
  • Received:2005-10-25 Online:2006-09-30 Published:2010-09-19

摘要: 论述了硬铝合金成形工艺中应变路径、固溶热处理和时效过程对成形极限的影响,由试验得到了单向拉伸预应变和固溶热处理后时效过程中的成形极限图FLD(Forming Limit Diagram),重点研究了固溶热处理后时效过程中成形极限的变化,并得到了铝合金在时效过程中的成形极限应力图FLSD(Forming Limit Stress Diagram).结果表明,原始退火状态材料的成形极限高于新淬火状态材料的成形极限,且新淬火状态材料的成形极限随时效时间增加而降低,原因主要在于固溶热处理过程中材料组织状态的变化和应变硬化指数n在时效过程中的降低;成形极限应变的降低导致成形极限应力也随时效时间增加而降低.

Abstract: FLD(forming limit diagram) was influenced by the material properties as well as forming process, such as strain path and heat-treatment states, etc. Some experimental FLDs were constructed for 2D12 aluminum alloy in the annealed, pre-strained and various aging time conditions after solution heat-treatment by rigid punch bulging. Based on the experimental results, the FLSD (forming limit stress diagram) was determined. By comparing and analyzing the FLD and FLSD, it is indicated that the FLD of annealed condition is higher than the FLD after heat-treatment and the aging hardening lowers the FLD. The results mainly dependon the metallurgical structure transformation during solution heat treatment and the decrease of hardening value n with aging. Furthermore, aging hardening lowers the FLSD mostly because it lowers the FLD. The result may be available for the sheet forming process design and numerical simulation.

中图分类号: 


版权所有 © 《北京航空航天大学学报》编辑部
通讯地址:北京市海淀区学院路37号 北京航空航天大学学报编辑部 邮编:100191 E-mail:jbuaa@buaa.edu.cn
本系统由北京玛格泰克科技发展有限公司设计开发