摘要
通过自行设计的实验装置研究了A356/H13钢在热力耦合下的界面换热系数随温度和接触载荷的变化规律。结果表明:采用由滑轮增力机构和液压增力机构组成的二级增力机构加载的稳态热流方法,可以对铸型/铸件热力耦合界面换热系数进行测量研究;双边加热实验比单边加热实验具有优越性;在所测量的温度和载荷范围内,A356/H13钢界面换热系数随着温度和载荷的增加而呈增大趋势;温度较高时的A356/H13钢界面换热系数对温度的敏感性比温度较低时大;A356/H13钢界面换热系数与界面载荷成近似线性关系。
The variation tendency of interface heat transfer coefficient of A356/H13 steel with the thermal-mechanical coupling effects is investigated by using an experimental setup designed by the authors.The results show that,the steady-state heat flow method,which is realized by means of a multiple force amplifier consisting of a pulley force amplifier and a hydraulic force amplifier,can enable the study of the heat transfer coefficient of casting/mold interface with thermal-mechanical coupling effects;the bilateral heating experiments are superior to the unilateral ones;the increase of temperature or load causes the increase of interface heat transfer coefficient in the test range;moreover,the interface heat transfer coefficient at high temperature is more sensitive to temperature than at low temperature,the interface heat transfer coefficient of A356/H13 is nearly linear with the interface load.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2012年第11期62-66,共5页
Journal of Chongqing University
基金
国家科技攻关重大专项资助项目(G09003.2-1)
重庆市科技攻关项目(CSTC2009AA3012-3)
关键词
换热系数
界面
耦合
铸件
稳态
heat transfer coefficients
interfaces
coupling
castings
steady-state
