(南方冶金學(xué)院材料工程系， 贛州 341000)
摘 要: 應(yīng)用工程法對(duì)雙金屬管襯拉復(fù)合過(guò)程進(jìn)行了分析，提出了雙金屬管襯拉時(shí)的三種流動(dòng)模式及幾何判據(jù)： (1) 當(dāng)0≤β＜β0時(shí)， 為復(fù)層變薄流動(dòng)模式；(2) 當(dāng)β0＜β≤α?xí)r， 為芯層變薄流動(dòng)模式； (3) 當(dāng)β=β0時(shí)， 為比例流動(dòng)模式。推導(dǎo)出了雙金屬管襯拉拉拔力的計(jì)算公式。 結(jié)果表明， 理論計(jì)算值與實(shí)測(cè)值的相對(duì)誤差約小于15%。
關(guān)鍵字: 關(guān)鍵詞: 雙金屬管 襯拉 拉拔力 工程法
（Department of Materials Engineering, Southern Institute of Metallurgy,Gangzhou 341000, P. R. China）
Abstract:It was analysed theoretically that the loads of bimetal tube drawing with a fixed plug by using slab method, and its three flow models and corresponding geometry criteria were proposed: (1) while 0≤β＜β0, it is the model of the coating getting thinner;(2) while β0＜β≤α, it is the model of the core getting thinner;(3) while β=β0, it is the model of homogenous flow. A formula on loads for bimetal tube drawing with a fixed plug is derived, experimental results show that the relative errors between theorectical values and the measured ones are about less than 15%, which can meet the demands of engineering calculation.
Key words: bimetal tube drawing with a fixed plug drawing loads
slab method
