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近代电力工业和电器设备的发展,要求提供强度、硬度、耐磨性高,耐热性及导热性好的高导电性材料。例如:大容量小型电机的发展需要高强、耐热、耐磨及导热、导电性高的整流子片;各种点焊、滚焊机需要高硬度、耐热、导电性好、寿命长的电极材料。 含0.4～1.0％铬的铬铝镁青铜具有高的机械性能和导电、导热性能,再结晶温度较高,因而耐热性较好,能于400℃以下工作,用于制作电机的整流子及电焊机的电极。 江苏清江拖拉机厂自1981年以来生产加重型自行车大杠,用铬铝镁青铜制作碰焊机电极,取得了满意的效果。
Modern power industry and the development of electrical equipment, require the provision of high strength, hardness, wear resistance, heat resistance and thermal conductivity of the high conductivity of the material. For example: the development of large capacity small motors requires high strength, heat resistance, wear resistance and thermal conductivity, high conductivity of the commutator film; a variety of spot welding, seam welding machine requires high hardness, heat resistance, good conductivity, long life electrode material. Chromium aluminum-magnesium bronze containing 0.4-1.0% chromium has high mechanical properties, electrical and thermal conductivity, high recrystallization temperature and good heat resistance, and can work below 400 ℃ for making commutator of motor and Welding electrode. Jiangsu Qingjiang tractor factory production aggravating bicycle big bar since 1981, made with chrome aluminum magnesium bronze touch welder electrode, and achieved satisfactory results.