论文部分内容阅读
我国第一条500千伏输电线路姚孟变电站主母线为法国进口铝合金管。合金成分(％)为:Si0.6～0.8、Fe0.4、Cu0.1～0.3、Mn0.1、Mg0.4～0.7。抗拉强度为26.5公斤/毫米~2。采用全位置脉冲熔化极半自动焊工艺进行焊接,获得了满意的接头质量。焊接设备选用国产NBA2-200型脉冲熔化极半自动氩弧焊机。该焊机属于并联式熔化极脉冲弧焊电源,由三相降压变压器、磁放大器、整流器组、电抗器构成,由具有陡降和平特性的直流焊接电源供给基本电流,用另一台与其并联的单
China’s first 500-kilovolt transmission line Yaomeng substation main bus for the French imports of aluminum tubes. Alloy composition (%): Si0.6 ~ 0.8, Fe0.4, Cu0.1 ~ 0.3, Mn0.1, Mg0.4 ~ 0.7. Tensile strength of 26.5 kg / mm ~ 2. All-position pulse melting semi-automatic welding process for welding, access to a satisfactory quality joints. Domestic selection of welding equipment domestic NBA2-200 pulse melting semi-automatic welding machine. The welding machine belongs to parallel melting pulsed arc welding power supply, and is composed of a three-phase step-down transformer, a magnetic amplifier, a rectifier group and a reactor, and the basic current is supplied by a direct current welding power supply with steep descending and peace characteristics. Single