液相线铸造Al-18Si合金的凝固组织与力学性能研究
Study on Solidification Microstructure and Mechanical Properties of Liquidus Cast Al-18Si Alloy
刘细良 1王云飞 1杜福林 1王建华1
作者信息
- 1. 常州大学江苏省材料表面科学与技术重点实验室,江苏常州 213164;常州大学材料科学与工程国家级实验教学示范中心,江苏常州 213164
- 折叠
摘要
采用光学显微镜、Image-Pro Plus软件、X射线衍射仪和万能拉伸试验机等研究液相线铸造Al-18Si合金的凝固组织与力学性能.结果表明,随着液相线温度下保温时间的增加,Al-18Si过共晶铝硅合金中初生硅的尺寸呈现先减小后增大的趋势,力学性能则呈现先增大后减小的趋势.与普通铸造相比,液相线铸造可使Al-18Si合金中初生硅平均尺寸减小30.6%,使该合金抗拉强度和伸长率分别提高27%和108%.因此,液相线铸造是改善过共晶铝硅合金凝固组织和力学性能的有效方法.
Abstract
The solidification microstructure and mechanical properties of liquidus cast Al-18Si alloy were studied using optical microscopy,Image-Pro Plus software,X-ray diffractometer,and universal tensile testing machine.The results indicated that with the increase of holding time at liquidus temperature,the size of primary silicon in Al-18Si hypereutectic aluminum silicon alloy showed a trend of first decreasing and then increasing,while the mechanical properties showed a trend of first increasing and then decreasing.Compared with ordinary casting,the liquidus casting reduced the average size of the primary silicon in the Al-18Si alloy by 30.6%,and increased the tensile strength and elongation of the alloy by 27%and 108%,respectively.Therefore,the liquidus casting was an effective method to improve the solidification microstructure and mechanical properties of hypereutectic aluminum silicon alloys.
关键词
过共晶铝硅合金/液相线铸造/凝固组织/力学性能Key words
hypereutectic Al-Si alloy/liquidus casting/solidification microstructure/mechanical properties引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据