空心铜银导线制备工艺的研制开发

Molding Process of Silver Copper Hollow Conductor

根据汽轮发电机转子绕组线材的工况特点及性能要求,采用铜银合金并加入微量稀土元素净化并改善合金性能,通过熔铸→挤压→拉拔→退火→拉拔→退火→拉拔工序,开发了不等壁厚空心矩形铜银合金导线。产品抗拉强度≮300MPa,屈服强度≮250 MPa,断后伸长率5%,布氏硬度≮85;20℃时最小电导率56 m/(Ω·mm2);加热到300℃保温1 h后,布氏硬度最大减少10%,热稳定性好。

According to the working characteristics and performance of the steam turbine generator rotor winding wire, using copper silver alloy and adding trace rare earth elements to purify and improve alloy properties, different wall thickness rectangular hollow copper silver alloy wires was developed by means of casting, extrusion, drawing, annealing, drawing, annealing and drawing process. As product, tensile strength ≮300 MPa, yield strength ≮250 MPa, break elongation is 5 percent, Brinell hardness ≮85. The minimum conductivity was 56 m/（Ω ·mm^2）at room temperature. When it was heated to 300℃ and kept heating one hour, its Brinell hardness decreased by 10% and has good thermal stability.