连续铸造铜单晶的力学性能和电阻率

采用自制水平单晶连铸设备制备铜单晶， 并对铜单晶的力学性能和电阻率进行了测试分析。结果表明，铜单晶与多晶铸棒比，抗拉强度降低２０ ．８５ ％ ，屈服强度降低８６ ．５４ ％ ，延伸率增加８０ ．２４ ％ ， 断面收缩率增加３９４ ．５０ ％ ； 与轧制棒比， 抗拉强度降低６５ ．９７ ％ ， 屈服强度降低９８ ．２７ ％ ， 延伸率增加２７０ ．００ ％ ， 断面收缩率增加４ ．００ ％ ； 与多晶铸棒比电阻率降低１５ ．５７ ％ ， 与定向凝固铸棒比电阻率降低４ ．２４ ％ 。因此， 连铸铜单晶具有非常优异的塑性加工性能和低电阻率

Mechanical properties and electrical resistivity of continuous casting single crystal copper

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.