(1. 上海交通大學(xué)鑄造研究所, 上海 200030； 2. 西北工業(yè)大學(xué)凝固技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室, 西安 710072)
摘 要: 采用自制水平單晶連鑄設(shè)備制備銅單晶，并對(duì)銅單晶的力學(xué)性能和電阻率進(jìn)行了測(cè)試分析。結(jié)果表明，銅單晶與多晶鑄棒比，抗拉強(qiáng)度降低20.85％，屈服強(qiáng)度降低86.54%，延伸率增加80.24％，斷面收縮率增加39 4.50%；與軋制棒比，抗拉強(qiáng)度降低65.97％，屈服強(qiáng)度降低98.27％，延伸率增加270.0 0%，斷面收縮率增加4.00 ％；與多晶鑄棒比電阻率降低15.57%, 與定向凝固鑄棒比電阻率降低4.24%。因此，連鑄銅單晶具有非常優(yōu)異的塑性加工性能和低電阻率。
關(guān)鍵字: 連續(xù)鑄造； 銅單晶； 力學(xué)性能； 電阻率
（1. Research Institute for Casting, Shanghai Jiao Tong University, Shanghai 200030，P.R.China
2. State Key Laboratory of Solidification Processing,
Northwestern Polytechnical University ,Xi'an 710072, P.R.China）
Abstract:The single-crystal copper is casted by self-made horizontal continuous casting equipment. The mechanical properties and resistivity of the single-crystal copper were studied. It was shown that the tensile strength and the yield strength of the continuous casting single-crystal copper rod decrease 20.85% and 86.54%, respectively, while the elongation and the reduction of cross-section area increase 80.24% and 394.50%, respectively, than those of the polycrystal copper rod. Compared with the rolling polycrystal copper, the tensile strength and the yield strength of the continuous casting single-crystal copper rod decrease 65.97% and 98.27%, respectively, while the elongation and the reduction of cross-section area increase 270.00% and 4.00%, respectively. The resistivity of single-crystal copper rod are 15.57% and 4.24%, respectively, which are lower than those of polycrystal and unidirectionally solidified polycrystal copper rods. The continuous casting single crystal copper rod have excellent properties for cold working and lower resistivity.
Key words: continuous casting；single-crystal copper；mechanical properties；electrical resistivity
