(安徽工業(yè)大學(xué) 冶金與材料學(xué)院， 馬鞍山 243002)
摘 要: 對(duì)擠壓鋁合金時(shí)錠坯與工模具接觸面上摩擦的性質(zhì)和行為進(jìn)行了研究。結(jié)果表明， 由于鋁錠坯與粘附在擠壓筒內(nèi)壁、 穿孔針和模具工作帶上的鋁套或鋁層是同種金屬， 粘著變形使得接觸表面微結(jié)構(gòu)自發(fā)地趨于相稱， 從而導(dǎo)致很大的摩擦； 其摩擦因數(shù)與鋁合金的牌號(hào)和變形抗力有關(guān)。建立了摩擦因數(shù)與變形抗力的關(guān)系式。
關(guān)鍵字: 摩擦因數(shù)；變形抗力； 擠壓； 鋁合金
FANG Mu-yun, CAO Jie
（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
