文献类型：期刊文献

中文题名：AlSi7MgBe合金的半固态挤压成形

英文题名：Semi-solid thixo-extrusion of AlSi7MgBe alloy

作者：赵大志[1];路贵民[2];崔建忠[1]

机构：[1]东北大学材料电磁过程研究教育部重点实验室,沈阳110004;[2]华东理工大学资源与环境工程学院,上海200237

年份：2009

卷号：23

期号：2

起止页码：127

中文期刊名：材料研究学报

外文期刊名：Chinese Journal of Materials Research

收录：CSTPCD;;EI(收录号：20092112090964);Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金50874049资助项目.~~

语种：中文

中文关键词：材料合成与加工工艺;AlSi7MgBe合金;半固态挤压;组织与性能

外文关键词：synthesizing and processing technics, AlSi7MgBe alloy, semi-solid thixoextrusion, microstructure and properties

摘要：对采用近液相线半连续铸造技术制备的AlSi7MgBe合金坯料进行半固态挤压成形,通过组织与性能的分析,研究了AlSi7MgBe合金的半固态挤压成形性.结果表明:用近液相线半连续铸造技术制备的AlSi7MgBe合金坯料具有均匀、细小的蔷薇状组织,在575℃对其二次加热可获得稳定的、适合于半固态触变成形的球化组织,进行半固态挤压成形可获得表面光洁,组织细小、分布均匀的成形件,在540℃固溶5 h然后175℃时效10 h处理,其抗拉强度为325 MPa,伸长率为14.6%,表明具有良好的半固态挤压成形性.
The semi-solid thixo-extruding feasibility of AlSiTMgBe alloy cast by near-liquidus semi-continuous casting （NLSC） process was studied by analyzing the microstructures and properties of extruded bars. The results shown that the microstructure of AlSi/MgBe alloy billets cast by NLSC consists mainly of the homogeneous, fine rosette-shaped grains. The microstructures of the billets, reheated and held at 575℃, are stable and near-spherical grains which are suitable for semi-solid thixoforming. The semi-solid thixoextruded bars of the AlSi7MgBe alloy billet are facial-smoothed, microstructure-fined and homogeneous. Treated by the solution at 540℃ for 5 hours and aging at 115℃ for 10 hours, the tensile strength of the semi-solid extruded bars is above 325 MPa and the elongation rate is above 14.5%.