(1. 貴州大學 材料與冶金學院，貴州 550025； 2. 貴州合潤鋁業(yè)新材料科技有限公司，貴州 550000)
摘 要: 鋁電工圓桿是電纜、電線的坯料，其質(zhì)量好壞直接影響鋁導線的優(yōu)劣。通過掃描電鏡、X射線物相分析等方法，對比鑄態(tài)、軋制態(tài)和形變時效態(tài)下不同Cu含量的稀土鋁電工圓桿的抗拉強度和導電率，研究形變熱處理對鋁電工圓桿的影響。結果表明：經(jīng)過形變熱處理后，試樣的晶界得到薄化，組織更加均勻；當Cu含量為0.2%時，通過(500 ℃，3 h固溶處理)+ 85%軋制+(150 ℃，12 h時效)的形變熱處理，試樣抗拉強度達到179 MPa，導電率為60.78%IACS，綜合性能較佳。
關鍵字: 形變熱處理；鋁電工圓桿；導電率；抗拉強度
（1. College of Material and Metallurgy, Guizhou University, Guizhou 550025, China; 2. Guizhou Herun new Aluminum Materials Technology Co., Ltd, Guizhou 550000, China）
Abstract:Electrical round aluminum rods are used as blank of cables and wires, their quality directly influences the merits of the aluminum wire. The tensile strength and electrical conductivity of rare earth electrical round aluminum rods with different Cu contents under the conditions of as-cast, rolling state and strain aging, respectively, were compared by scanning electron microscope, X-ray diffraction analysis and other methods. The effect of thermomechanical treatment on the properties of electrical round aluminum rods was studied. The result show that after deformation treatment treatment, the grain boundary of samples becomes thinner than former, the microstructure is more compact and well-distributed. The comprehensive performance of sample is better after (500 ℃, 3 h, solid solution)+85% rolling+(150 ℃, 12 h, aging) thermomechanical treatment, when the Cu content of specimen is 0.2%, the tensile strength of specimen reaches to peak value (179 MPa), and the electrical conductivity is 60.78%IACS.
Key words: thermo-mechanical treatment; electrical round aluminum rod; electric conductivity; strength of extension
