接触面载荷和温度对AZ91D镁合金/H13模具钢界面接触换热系数的影响
Effects of Contact Surface Load and Temperature on Thermal Contact Conductance Coefficient of AZ91D Magnesium Alloy and H13 Die Steel Interface
摘 要
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, 通过自制的界面接触换热系数测量装置对AZ91D镁合金/H13模具钢界面的接触换热系数进行了研究, 分析了接触面载荷和温度对界面接触换热系数的影响。结果表明: 当接触面载荷较低时, 随载荷的增大, 接触换热系数变化较为显著, 在高载荷区域接触换热系数对载荷的敏感性有所下降; 接触面温度越高,接触换热系数越大, 在320~370 ℃温度范围内,界面接触换热系数随温度升高的变化不明显,越过此阶段后又随温度升高而增大。
AZ91D镁合金
H13模具钢
接触面载荷
接触面温度
thermal contact conductance (TCC) coefficient
AZ91D magnesium alloy
H13 die steel
interfacial load
interfacial temperature
Abstract
Using steady state heat flow method composed of pulley reinforcement mechanism and hydraulic booster mechanism of two grade reinforcement mechanism loading to study the thermal contact conductance(TCC) efficient of AZ91D magnesium alloy and H13 die steel interface by the self-made measuring device, and the effects of interfacial load and temperature on TCC efficient were analyzed. The results show that, when the interfacial load was low, the TCC efficient changed significantly with the increase of the load. In the high load area, the sensitivity of TCC efficient on load declined. The higher the interfacial temperature, the more the TCC, in the temperature range of 320-370 ℃, the TCC coefficient changed little with the increase of the temperature, beyond this stage, TCC increased again with the increase of the temperature.
中图分类号 TG115.9
所属栏目 试验研究
基金项目 国家科技攻关重大专项项目(G09003.2-1); 重庆市科技攻关项目(CSTC, 2009AA3012-3)
收稿日期 2012/11/30
修改稿日期 2013/9/17
网络出版日期
作者单位点击查看
备注王亚军(1986-), 男, 重庆人, 讲师, 硕士。
引用该论文: WANG Ya-jun,ZHANG Tao,LUO Jie. Effects of Contact Surface Load and Temperature on Thermal Contact Conductance Coefficient of AZ91D Magnesium Alloy and H13 Die Steel Interface[J]. Materials for mechancial engineering, 2014, 38(1): 19～22
王亚军,张涛,罗杰. 接触面载荷和温度对AZ91D镁合金/H13模具钢界面接触换热系数的影响[J]. 机械工程材料, 2014, 38(1): 19～22
被引情况:
【1】丁俭,范玮,赵乃勤,赵维民,王志峰,刘利华, "汽车铝合金轮毂低压铸造工艺的有限元模拟及优化",机械工程材料 40, 93-98(2016)
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【12】WHITEHOUSE D J . Handbook of Surface Metrology［M］.Bristol: Institute of Physics Publishing,1994.
【13】朱德才, 张立文, 裴继斌, 等.固态塑性成形过程中界面接触换热的实验研究［J］.塑性工程学报, 2008, 15(1): 92-96.
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