(西北工業(yè)大學凝固技術(shù)國家重點實驗室，西安710072)
摘 要: 單晶連鑄技術(shù)是一項新型的有色金屬連鑄技術(shù)，可以連續(xù)制造無限長的、表面呈鏡面狀，內(nèi)部無縮孔、縮松、氣孔、夾雜等鑄造缺陷的單晶線材，屬于近成品形狀(near-net-shape)生產(chǎn)技術(shù)。其產(chǎn)品金屬單晶線材，具有優(yōu)異的塑性加工性能和良好的導(dǎo)電性能，是一種可以滿足電子工業(yè)要求的導(dǎo)電材料。該文介紹了單晶連鑄技術(shù)的原理，以及利用小型單晶連鑄設(shè)備制造的純鋁單晶線材的工藝試驗及性能。
關(guān)鍵字: 金屬單晶 連續(xù)鑄造 導(dǎo)電線材 工藝試驗 技術(shù)原理
CONTINUOUS CASTING OF SINGLE CRYSTAL METALS
（State Key Laboratory of Solidification Processing,
Northwestern Polytechnical University, Xi′an 710072）
Abstract:The technique of continuous casting of single crystal metals (CCSC) is a new near-net-shape processing for continuous casting of nonferrous metal wires. The product of CCSC has a smooth surface like mirror and has a characteristic of no casting defects such as shrinkage porosity, gaseous porosity and impurities. The principle of CCSC and the experimental equipment designed and manufactured by the authors specially for the experiment have been introduced. Us-
ing this equipment, the technological test of CCSC of industrial pure aluminum was completed and a single crystal Al rod,8 mm in diameter and 8~10 m in length, was obtained. Mechanical property measurements showed that although theσb of CCSC rod is lower than that of the die casting rod by 38%, theσ0.2/σbis increased by 93% and the elongation ratio,δ,is increased by 117%. It can be predicted that the product of CCSC has excellent properties for cold working.
Key words: single crystal metal continuous casting electric wire technology test principle
