ZL101合金的离心铸造试验与模拟  

Centrifugal Casting Experiment and Simulation of ZL101 Alloy

作　　者：孟嘉楠 吴瑞瑞 王孝国 李秋书[1] 朱乾科 丁福帅 MENG Jia’nan;WU Ruirui;WANG Xiaoguo;LI Qiushu;ZHU Qianke;DING Fushuai(School of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China;Analysis Testing Center,Taiyuan University of Science and Technology,Taiyuan 030024,China)

机构地区：[1]太原科技大学材料科学与工程学院,山西太原030024 [2]太原科技大学分析测试中心,山西太原030024

出　　处：《热加工工艺》2021年第19期67-70,74,共5页Hot Working Technology

摘　　要：用离心铸造法制备了ZL101合金,研究了离心速率对合金组织结构的影响,并对不同离心速率下的充型凝固过程进行了数值模拟,并与试验结果进行对比。试验结果表明,当离心速度低于0~200 r/min时,晶粒相对粗大,为37μm,且合金内有连续成片的缩松,共晶组织呈现大块的板片状,随着离心速度的增加(350~500 r/min),晶粒明显细化,尺寸为14.5μm,缩孔缩松体积明显减小,共晶硅组织细碎化,沿晶界弥散分布。模拟的合金充型凝固过程与实验结果相吻合。ZL101 alloy was prepared by centrifugal casting, and the effect of centrifuge speed on the structure of the alloy was investigated. Besides, the simulation of filling and solidification process under different centrifuge speeds was carried out,which were compared with experiment result. The results show that, when the centrifuge speed is less than 200 r/min, the grain is relatively coarse and the grain size is about 37 μm. Meanwhile, the gathering shrinkage cavity and shrinkage porosity exist in the alloy and the eutectic structure shows large plate like shape. With the increase of centrifuge speed(350-500 r/min),the grains are refined(14.5 μm) and the volume of the shrinkage cavity and porosity decreases. In addition, the eutectic silicon is broken and distributes along the grain boundary. The simulated filling and solidification process of the alloy is consistent with the experiment results.

关 键 词：ZL101 离心铸造 数值模拟 显微结构 

分 类 号：TG249.4[金属学及工艺—铸造]