铸造2018，Vol.67Issue(5)：393-397,5.
Sr/P变质处理对挤压铸造Al-17.5Si合金组织与性能的影响
Effect of Sr/P Modification on Microstructure and Mechanical Properties of Squeeze Casting Al-17.5Si Alloy
孙海军 1罗惠馨 2张立军 2孙继鸿 2李润霞2
作者信息
- 1. 辽宁石油化工大学,辽宁抚顺113001
- 2. 沈阳工业大学材料科学与工程学院,辽宁沈阳110870
- 折叠
摘要
Abstract
The effects of Sr and P modification on the microstructure and mechanical properties of the Al-17.5Si alloy were mainly studied in this paper. The results show that the microstructure of the alloy is significantly changed by the squeeze casting process, and the mechanical properties of the alloy are improved remarkably. After being modified by Sr, the eutectic Si phase in the squeeze cast Al-17.5Si alloy is changed into the tiny fibrous microstructure, and compared with the conventional sand casting, the tensile strength and elongation of the squeeze cast Al-17.5Si alloy are improved 59％ and 328.7％, respectively. However, with the addition of P in the squeeze cast Al-17.5Si alloy, large amounts of coarse primary Si phase particles emerges in the microstructure of the alloy, and then the tensile strength and elongation of the alloy decrease obviously. So it is concluded that the best modification agent for the squeeze casting hypereutectic Al-Si alloy is Sr rather than P addition.关键词
过共晶Al-Si合金/变质处理/挤压铸造/初生Si相/力学性能Key words
hypereutectic Al-Si alloy/modification/squeeze casting/primary Si/mechanical properties分类
矿业与冶金引用本文复制引用
孙海军,罗惠馨,张立军,孙继鸿,李润霞..Sr/P变质处理对挤压铸造Al-17.5Si合金组织与性能的影响[J].铸造,2018,67(5):393-397,5.
