热型连铸准单晶铜杆的工艺及性能

利用现有的水平连铸设备,改冷铸型为加热铸型,并在此基础上对电解铜（纯度99．95％）进行了水平连铸试验。在纯铜热型连铸过程中,当铸型出口温度为1135℃、拉铸速度为74mm／s、冷却距离为20mm时,能够拉铸出准单晶铜棒材。试验后对准单晶铜的电阻率和力学性能进行了测试分析,结果表明：与国家标准纯铜线T2M相比,准单晶铜的电阻率与国家标准相当;准单晶铜的抗拉强度与国家标准相比降低了26．6％,伸长率最大增加了76％。因此,准单晶铜具有较优异的塑性加工性能和较低电阻率,并且生产率较高。

Technology and Properties of Quasi-single Crystal Copper Produced by Heated Mould Continuous Casting

Changing chill mould for heated mould, the quasi-single crystal copper rod was cast by horizontal heated mould continuous casting equipment with electrolytic copper as raw material （purity 99.95 %）. During the heated mould continuous casting, the quasi-single crystal copper rod can be produced with optimized processing parameters, such as mould outlet temperature of 1135 ~C , drawing velocity of 74 mm/s,cooling distance of 20 mm. The resis tivity and mechanical properties of the quasi-single crystal copper were studied after the experiment. Compared with red copper rod, it is shown that the resistivity of the continuous cast quasi-single crystal copper rod correspond to GB and the tensile strength of the continuous cast quasi-single crystal copper rod decrease by 26.6 ~, while the e- longation increases by upto 76 %. The continuous cast quasi-single crystal copper rods have excellent properties for cold working, lower resistivity, and higher productivity.