(安徽工业大学 冶金与材料学院， 马鞍山 243002)
摘 要: 对挤压铝合金时锭坯与工模具接触面上摩擦的性质和行为进行了研究。结果表明， 由于铝锭坯与粘附在挤压筒内壁、 穿孔针和模具工作带上的铝套或铝层是同种金属， 粘着变形使得接触表面微结构自发地趋于相称， 从而导致很大的摩擦； 其摩擦因数与铝合金的牌号和变形抗力有关。建立了摩擦因数与变形抗力的关系式。
关键字: 摩擦因数；变形抗力； 挤压； 铝合金
（College of Metallurgy and Materials, Anhui University of Technology,
Maanshan 243002, China）
Abstract:The aspects and behaviors of the friction existing on the interface of the billet and die during the process of aluminium alloy extrusion were studied. The results show that because the billet, the mandrel and the aluminium cohering to the bearing between the inner wall of the container and the die are the same metal, and coherent deformation makes the microstructure on the interface be smooth, then results in large friction.The friction coefficient is related to deformation resistance and the composition of aluminium alloy. The equation of friction coefficient with deformation resistance was derived.
Key words: friction coefficient; deformation resistance; extrusion; aluminium
