GKMS60铜合金低压铸造过程界面传热反算求解及应用  

Solution and Application of Inverse Heat Transfer between GKMS60 and Copper Chill in Low Pressure Die Casting Process

作　　者：胡柏乐 曹流[1] 孙飞[1] 唐玉龙[1] 廖敦明[1] 

机构地区：[1]华中科技大学材料成形及模具技术国家重点实验室

出　　处：《特种铸造及有色合金》2017年第12期1323-1326,共4页Special Casting & Nonferrous Alloys

基　　金：教育部新世纪优秀人才支持计划(NCET-13-0229);国家数控重大专项资助项目(2012ZX04010-031)

摘　　要：基于热传导反算法,自主开发了传热系数反算程序。该反算法需要根据测温数据来确定材质间的界面传热系数。设计了单向重力铸造试验,基于试验中靠近界面处位置测得的温度,求解得到了GKMS60铜合金和模具铜之间的传热系数。结果表明,界面传热系数变化主要发生在液-固相区间,其变化范围在1 000～2 700 W/(m^2·K)之间。将反算得到的界面传热系数运用到低压铸造模拟当中,提高了模拟结果的准确性。Based on inverse heat conduction,the anti-arithmetic program of heat transfer coefficient was developed.In the process of calculating the ITHC,the inverse analysis method is dependent on experiment temperature data.Unidirectional gravity casting experiment was designed.The interface heat transfer coefficient of GKMS60 copper and copper chill was obtained based on measured temperatures near the interface position.The results reveal that the IHTC is changed in the range of approximately1 000～2 700 W/（m^2·K）in the liquid-solid phase zone.By applying the identified IHTC into low-pressure casting simulation,accuracy of the numerical simulation was improved effectively.

关 键 词：GKMS60铜合金 界面传热系数 反热传导法 低压铸造 

分 类 号：TG249.2[金属学及工艺—铸造]