Influence of Deformation on the Microstructure and Low-temperature Refining Behavior of Al-3.5P Master Alloy  

作　　者：Huan Qiao Xiangzhen Zhu Tong Gao Yuying Wu Xiangfa Liu 

机构地区：[1]Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials,Ministry of Education,Shandong University

出　　处：《Journal of Materials Science & Technology》2015年第4期391-396,共6页材料科学技术（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.51001065);the National Basic Research Program of China(973 Program,No.2012CB825702)

摘　　要：In this paper,the influence of deformation on the microstructure and low-temperature refining behavior of Al-3.5P master alloy was investigated.The results show that the average size of AIP particles can be reduced obviously from 15.3 μm to about 2.1 μm by deformation.However,it exhibits entirely opposite influence on refining performance when A1-3.5P master alloy was deformed at room temperature and high temperature,respectively.Only when Al-3.5P master alloy was subjected to thermal deformation,can an improvement of low-temperature refining performance be obtained.In this condition,primary Si in A390 alloy can be refined from 137 to 21 μm,making it a potential candidate for die casting production.A mechanism associated with the transformation of particle-matrix interface during deformation has been proposed and further experiment has been designed to validate it.In this paper,the influence of deformation on the microstructure and low-temperature refining behavior of Al-3.5P master alloy was investigated.The results show that the average size of AIP particles can be reduced obviously from 15.3 μm to about 2.1 μm by deformation.However,it exhibits entirely opposite influence on refining performance when A1-3.5P master alloy was deformed at room temperature and high temperature,respectively.Only when Al-3.5P master alloy was subjected to thermal deformation,can an improvement of low-temperature refining performance be obtained.In this condition,primary Si in A390 alloy can be refined from 137 to 21 μm,making it a potential candidate for die casting production.A mechanism associated with the transformation of particle-matrix interface during deformation has been proposed and further experiment has been designed to validate it.

关 键 词：Al-Si alloy A-P master alloy DEFORMATION Grain ref 

分 类 号：TG292[金属学及工艺—铸造]