Effect of excitation current intensity on mechanical properties of ZL205A castings solidified under a traveling magnetic field  

作　　者：Xue-yi Fan Liang Wang Zhi-qiang Du Yan-qing Su Jian-bing Zhang Liang-shun Luo Zu-chuan Liu Da-ming Xu Jing-jie Guo 

机构地区：[1]National Key Laboratory for Precision Hot Processing of Metals, School of Materials Science and Engineering, Harbin institute of Technology, Harbin 150001, China [2]Tianjin Long March Launch Vehicle Manufacturing Co. Ltd., Tianjin 300462, China [3]China Shoudu Space Machinery Company, Beijing 100076, China

出　　处：《China Foundry》2015年第3期196-201,共6页中国铸造（英文版）

基　　金：financially supported by the National Basic Research Program of China(2011CB610406);the Natural Science Foundation of Hei Longjiang Province(JC201209);the National Natural Science Foundation of China(51425402)

摘　　要：The effect of excitation current intensity on the mechanical properties of ZL205 A castings solidified under a traveling magnetic field was studied. The results of the experiment indicate that the excitation current intensity of the traveling magnetic field has a great influence on the mechanical properties of the ZL205 A castings. When the excitation current intensity is 15 A, the tensile strength and elongation of ZL205 A alloy castings increase 27.2% and 67.7%, respectively, compared with those of the same alloy solidified under gravity. The improvement of mechanical properties is attributed to the decrease of micro-porosity in the alloy. Under the traveling magnetic field, the feeding pressure in the alloy melt before solidification can be enhanced due to the electromagnetic force. Moreover, the melt flow induced by the traveling magnetic field can decrease the temperature gradient. The feeding resistance will be increased because the temperature gradient decrease. So traveling magnetic field has an optimum effect on feeding.The effect of excitation current intensity on the mechanical properties of ZL205 A castings solidified under a traveling magnetic field was studied. The results of the experiment indicate that the excitation current intensity of the traveling magnetic field has a great influence on the mechanical properties of the ZL205 A castings. When the excitation current intensity is 15 A, the tensile strength and elongation of ZL205 A alloy castings increase 27.2% and 67.7%, respectively, compared with those of the same alloy solidified under gravity. The improvement of mechanical properties is attributed to the decrease of micro-porosity in the alloy. Under the traveling magnetic field, the feeding pressure in the alloy melt before solidification can be enhanced due to the electromagnetic force. Moreover, the melt flow induced by the traveling magnetic field can decrease the temperature gradient. The feeding resistance will be increased because the temperature gradient decrease. So traveling magnetic field has an optimum effect on feeding.

关 键 词：TMF ZL205A alloy excitation current intensity mechanical properties optimum effect 

分 类 号：TG111.4[金属学及工艺—物理冶金] U641.482[金属学及工艺—金属学]