立式离心铸造ZL205A铝合金薄壁铸件的凝固组织  

Solidified structure of ZL205A aluminum alloy thin-walled castings under vertical centrifugal casting process

作　　者：徐琴[1] 王星[1] 何石磊 张兰权 XU Qin;WANG Xing;HE Shilei;ZHANG Lanquan(School of Mechanic and Electrical Engineering,Henan University of Technology,Zhengzhou 450001,China;CITIC Heavy Industries,Luoyang 471003,China)

机构地区：[1]河南工业大学机电工程学院,河南郑州450001 [2]中信重工机械股份有限公司,河南洛阳710109

出　　处：《材料研究与应用》2018年第3期196-199,209,共5页Materials Research and Application

基　　金：河南省高等学校重点科研项目(17A460009);河南工业大学小麦和玉米深加工国家工程实验室开放基金资助项目(NL2017007)

摘　　要：采用CAF方法,对立式离心铸造ZL205A铝合金薄壁铸件的凝固组织进行模拟,获得了不同工艺下铸件的凝固组织并对其进行了研究.结果表明:ZL205A合金薄壁铸件的凝固组织大多数为尺寸均匀而细小的等轴晶晶粒,只存在极少量粗大的柱状晶晶粒;改变工艺参数,立式离心铸造ZL205A铝合金铸件的凝固组织发生变化,立式离心铸件的凝固组织随着铸型的离心转速增加而细化,提高浇注温度时铸件的晶粒尺寸略有增大,而提高铸型预热温度对立式离心铝合金铸件的凝固组织的影响不大.The solidified structure of the ZL205A aluminum alloy thin-walled castings under vertical centrifugal casting process were simulated by the CAF method,and the solidified structure with different technological parameters are obtained. The results reveal that the solidified structures of thin-walled ZL205A aluminum alloy castings are mostly fine equiaxed grains with homogeneous crystal size and few coarse columngrains. The solidified structures change with the variation of the technological parameters. The grain sizes of the solidified structures increase with the increment of mould rotational speed, and there is a slight increase when increasing the melt pouring temperature. Furthermore,the increase of the mould preheats temperature affect the grains not apparently.

关 键 词：ZL205A合金 立式离心铸造 薄壁铸件 凝固组织 

分 类 号：TG249.4[金属学及工艺—铸造]