铸造2018，Vol.67Issue(5)：437-440,4.
变质及不同时效工艺对A356合金组织和力学性能的影响
Effect of Modification and Different Aging Processes on Microstructure and Mechanical Properties of A356 Alloy
胡中潮 1于慧 2崔元胜 3孟另柱1
作者信息
- 1. 天津那诺机械制造有限公司,天津300457
- 2. 辽宁工程技术大学,辽宁阜新121300
- 3. 空军驻山东地区军事代表室,山东济南250023
- 折叠
摘要
Abstract
The microstructure and mechanical properties of A356 alloys were investigated by optical microscope and universal testing machine after Na, Sr or Sb modification and different heat treatment processes. The results show that Na, Sr or Sb each has excellent modification effects on the eutectic silicon of A356 alloy under the same production conditions. After holding for 40 min, the Na modification in the melt was partially invalidated, and the Sr or Sb modification effect has no obvious change even after the melt was held for 2 hours. Under the conditions of Sb modification, solution treatment for 8 h at 535 ℃±5 ℃, and aging treatment at 155 ℃±5 ℃, the macroscopic structure and grain size of A356 alloy are not changed obviously with different aging time, but with the increase of aging time, the ultimate tensile strength, yield strength and elongation of the alloy changed from 266 MPa, 205 MPa and 8％ to 295 MPa, 227 MPa and 6.5％, respectively. It is possible to choose proper heat treatment process for the alloy according to its different requirements of performance.关键词
A356合金/变质/热处理/组织/力学性能Key words
A356 alloy/modification/heat treatment/microstructure/mechanical properties分类
矿业与冶金引用本文复制引用
胡中潮,于慧,崔元胜,孟另柱..变质及不同时效工艺对A356合金组织和力学性能的影响[J].铸造,2018,67(5):437-440,4.
