基于界面传热系数逆向求解的ZL205合金精密铸造流动及凝固规律仿真研究  

Simulation on Flow and Solidification Law of ZL205 Alloy Investment Casting Based on Inverse Solution of Interfacial Heat Transfer Coefficient

作　　者：杨劼人 李霄玥 王晔[2] 廖泽 李程 YANG Jieren;LI Xiaoyue;WANG Ye;LIAO Ze;LI Cheng(College of Materials Science and Engineering,Sichuan University,Chengdu 610065;School of Materials Sci-ence and Engineering,Harbin University of Science and Technology,Harbin 150006;Chengdu Xingyu Precision Casting Co.,Ltd.,Chengdu 610065)

机构地区：[1]四川大学材料科学与工程学院,成都610065 [2]哈尔滨理工大学材料科学与工程学院,哈尔滨150006 [3]成都兴宇精密铸造有限公司,成都610065

出　　处：《特种铸造及有色合金》2024年第11期1465-1470,共6页Special Casting & Nonferrous Alloys

基　　金：成都市科技局高校院所科技人才创新服务资助项目(2022-RC03-00001-CG)。

摘　　要：基于精密铸造技术,通过凝固冷却过程多点测温并结合有限元计算,进行了ZL205合金浇注界面传热系数反算,以提升仿真过程的物理场求解精度及可信度。在此基础上,在型壳预热200、500℃和空冷、风冷条件下,对多类型、多尺寸样件进行了浇注过程数值模拟及试验验证,讨论了合金流动、凝固、成形能力及缺陷防止手段。本研究发现高型壳预热温度可以显著提升合金成形能力和抑制铸造缺陷,500℃预热、空冷条件下ZL205合金极限成形能力在3 mm左右。Based on investment casting technology,the inverse calculation of heat transfer coefficient of pouring interface in ZL205 alloy was realized through multi-point temperature measurement and finite element(FE)calculation to improve the accuracy and reliability of physical field solution.On this basis,the FE simulation and experimental verification of pouring process were carried out on multi-type and multi-size parts under the preheating condition of 200,500℃as well as natural and air-cooling.The flow,solidification,ultimate castability and defect prevention of the alloy were discussed.It is found that the preheating of high shell can significantly improve the forming ability of alloy and inhibit casting defects.The ultimate forming ability of ZL205 alloy is about 3 mm under the preheating condition at 500℃and air cooling.

关 键 词：ZL205合金 精密铸造 界面传热系数 有限元计算 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论] TG146.21[自动化与计算机技术—计算机科学与技术] TG249.5[一般工业技术—材料科学与工程]