铸造2013，Vol.62Issue(1)：13-16,20,5.
时效处理对高强韧压铸Al-Mg-Si-Mn合金力学性能的影响
Effect of Aging Treatment on the Mechanical Properties of Die Casting Al-Mg-Si-Mn Alloys with High Strength and Toughness
胡祖麒 1万里 1吴晗 1刘学强 1邹广 1吴树森1
作者信息
- 1. 华中科技大学材料成形与模具国家重点试验室,湖北武汉430074
- 折叠
摘要
Abstract
Al-Mg-Si-Mn alloy can be used to produce high strength automotive components due to its excellent strength and toughness. In order to improve the mechanical properties of die casting Al-Mg-Si-Mn alloy, artificial aging treatment (250℃ ×l h) is adopted in the present work. Tensile and fatigue tests are conducted on as-cast and aged samples. Optical microscope and SEM are used to observe the microstructural variation after aging treatment and analyze the fatigue fracture surface. The results indicate that the amount of β-Al8Mg5 distributed in the matrix decreased obviously after aging treatment. Ultimate tensile strength, yield strength and hardness increased 14%, 29% and 9%, respectively. Elongation slightly changed from 8.31% to 8.47%. In addition, effect of aging treatment on fatigue life is negligible.关键词
压铸/时效处理/Al-Mg-Si-Mn合金/力学性能/疲劳Key words
die casting/aging treatment/Al-Mg-Si-Mn alloy/mechanical property/fatigue分类
矿业与冶金引用本文复制引用
胡祖麒,万里,吴晗,刘学强,邹广,吴树森..时效处理对高强韧压铸Al-Mg-Si-Mn合金力学性能的影响[J].铸造,2013,62(1):13-16,20,5.
