摘要
为了提高黏性介质的导热率以及黏性介质温热成形效率,提出了将铝颗粒填充到黏性介质中的方法。通过铝颗粒在黏性介质中的沉降实验、热导率实验和压缩实验,确定铝颗粒的粒径和填充质量分数对黏性介质性能的影响。通过聚醚酰亚胺(PEI)板材和AZ31B镁合金板材黏性介质温热胀形实验,确定铝颗粒的粒径和填充质量对胀形试验加热准备时间、胀形试件轮廓曲线以及壁厚分布和表面粗糙度的影响。研究结果表明,在一定温度条件下,选择合适的粒径和填充质量分数的铝颗粒作为黏性介质的填充物,对黏性介质热导率的提高以及成形效率的改善较为明显,但对黏性介质其他性能的影响较小。该研究可以为提高黏性介质温热成形效率提供参考。
Incorporating aluminum particles into viscous medium was proposed to improve the thermal conductivity of the viscous medium and the efficiency of warm viscous pressure forming(WVPF)process.The influence of aluminum particles on a viscous medium was investigated through settling,thermal conductivity,and compression experiments.Warm viscous pressure bulging(WVPB)experiments were conducted on polyetherimide(PEI)and AZ31B magnesium alloy sheets to determine the influence of the aluminum particles size and fraction on the forming efficiency and formed specimens based on the heating preparation times and profile curves,wall thicknesses and surface roughness values of the bulging specimens.The results show that the thermal conductivity of the viscous medium and the WVPF efficiency can be greatly improved via the addition aluminum particles with appropriate size and fraction under certain temperature condition,but have less influence on other properties of viscous medium.
作者
高铁军
吕阳杰
刘青
王忠金
GAO Tie-jun;LV Yang-jie;LIU Qing;WANG Zhong-jin
基金
Project(51575364)supported by the National Natural Science Foundation of China
Project(2014ZE54024)supported by the Aviation Science Foundation of China
Project(LJQ2015083)supported by the Liaoning Excellent Talents in University,China
关键词
黏性介质温热成形
铝颗粒
热导率
成形效率
warm viscous pressure forming
aluminum particles
thermal conductivity
forming efficiency
