(大連海事大學(xué) 機電與材料工程學(xué)院, 大連 116026)
摘 要: 研究經(jīng)室溫拉變形后的純銅包覆鋁合金的不同線徑的線材的顯微組織及力學(xué)性能。 結(jié)果表明: 顯微組織自原始的等軸晶變?yōu)榧?xì)長條纖維狀, 纖維直徑與形變量近似地成反比, 纖維長度與形變量的平方近似地成正比； 經(jīng)室溫拉變形的銅包鋁線的極限抗拉強度隨形變量增大而增大, 與形變量平方根呈直線關(guān)系； 延伸率隨形變量增大逐漸降低, 但延伸率波動較大。根據(jù)原始純銅和合金鋁的極限抗拉強度值, 可以用復(fù)合材料強度的混合法則近似地預(yù)測不同線徑的銅包鋁線的極限抗拉強度。
關(guān)鍵字: 銅包鋁線； 顯微組織； 力學(xué)性能
copper clad aluminum wire by drawing
at room temperature
（College of Electromechanics and Material Engineering,
Dalian Maritime University, Dalian 116026, China）
Abstract: The microstructure and mechanical properties of pure copper clad aluminum wires in different diameters by drawing at room temperature were studied. The results show that the microstructure of the cladding wire by drawing at room temperature is vimineous grain as fibril shape from prime equiaxed grain. The fibril diameter is in inverse proportion to deformation and the fibril length is in direct proportion to the square of deformation approximately. The ultimate tensile strength of the cladding wire by drawing at room temperature goes up in direct proportion to square root of deformation, whereas the elongation decreases and fluctuates. Based on the ultimate tensile strength of prime pure copper and alloy aluminum, the ultimate tensile strength of the cladding wires with different diameters can be doped out by mix principle of composite material.
Key words: copper clad aluminum wire; microstructure; mechanical property
