压铸过程中铸件-铸型界面换热系数与铸件凝固速率的关系  

RELATIONSHIP BETWEEN METAL-DIE INTERFACIAL HEAT TRANSFER COEFFICIENT AND CASTING SOLIDIFICATION RATE IN HIGH PRESSURE DIE CASTING PROCESS

作　　者：郭志鹏[1] 熊守美[1] Mei Li John Allison 

机构地区：[1]清华大学机械工程系先进成形制造教育部重点实验室,北京100084 [2]Research ＆ Advanced Engineering Department, Scientific Research Laboratory, Ford Motor Company, Dearborn, MI 48121, USA

出　　处：《金属学报》2009年第1期102-106,共5页Acta Metallurgica Sinica

基　　金：国家自然科学基金项目50675114;国家重点基础研究发展计划项目2006CB605208-2和2005CB724105;日本东洋机械金属株式会社国际合作项目0503J18资助~~

摘　　要：在实际压铸实验的基础上,求解了铸件-铸型界面换热系数h与铸件凝固速率v的关系.结果表明,二者呈线性变化关系:h=k_(h-v)·v+ω(其中,斜率k_(h-v)为铸型初始表面温度及铸件厚度的函数,ω为常数);通过线性拟合确定k_(h-v)和ω值,从而确立换热系数与铸件凝固速率的关系.这种关系同时适用于镁合金AM50和铝合金ADC12.Based on die casting experiments, metal-die interracial heat transfer coefficient （IHTC or h） was determined, and it is found that the IHTC changes linearly with the solidification rate v, i.e., h=kh-v v＋ω, where kh-v is a function of the initial die surface temperature and the casting thickness while ω is a constant. Both kh-v and ω can be calculated by applying the regression method. Such relationship between h and v is suitable for both AM50 magnesium alloy and ADC12 aluminum alloy.

关 键 词：压铸 界面换热系数 凝固速率 镁合金AM50 铝合金ADC12 

分 类 号：TG249.2[金属学及工艺—铸造] TG292