(北京科技大學(xué) 新材料技術(shù)研究院，北京 100083)
摘 要: 采用三維剛塑性有限元法，研究銅包鋁復(fù)合線材由圓斷面到扁斷面的平輥軋制變形行為及其對(duì)主要工藝參數(shù)的影響，并對(duì)模擬結(jié)果進(jìn)行實(shí)驗(yàn)驗(yàn)證。結(jié)果表明：銅包鋁圓線平輥軋制的寬展率和伸長(zhǎng)率與壓下率之間存在線性關(guān)系；當(dāng)壓下率為17.4%和29.4%時(shí)，摩擦因數(shù)對(duì)銅包鋁扁線寬展率的影響很小；當(dāng)壓下率為43%時(shí)，隨摩擦因數(shù)的增加寬展率增大；軋輥直徑增大，扁線寬展率呈增大趨勢(shì)，銅層分布的均勻性提高，但影響較小；在總壓下率一定時(shí)，采用盡可能少的壓下道次可使扁線獲得更大的寬展率和更均勻的銅層分布；有限元計(jì)算結(jié)果與實(shí)驗(yàn)結(jié)果具有較好的一致性。
關(guān)鍵字: 銅包鋁；扁線；平輥軋制；數(shù)值模擬
rolling behaviors of copper cladding aluminum flat wires
（Advanced Materials & Technology Institute, University of Science and Technology Beijing, Beijing 100083, China）
Abstract: The deformation behaviour of copper cladding aluminum wire in flat rolling process was investigated. The effect of main process parameters on the deformation was analyzed by 3D rigid plastic finite element model combining with experiments. The results show that there is a linear relation between the reduction rate and spread and elongation rate for the copper cladding aluminum flat wires. When the reduction rates are 17.4% and 29.4%, the friction coefficient has a very small influence on the spread rate. When the reduction ratio is 43%, the spread rate increases as the friction coefficient increases. With increasing roller diameter, the spread rate is enhanced and the distribution uniformity of copper layer is improved, but the effect is small. When the total reduction rate is invariable, it is suggested that the flat wire has more spread rate and uniformity of copper layer using possible fewer passes. The reasonable agreement of the FEM predictions and the experimental results is obtained.
Key words: copper cladding aluminum; flat wire; flat rolling; numerical simulation
