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要稳定地生产φ0.02mm锰铜合金细丝,可选用真空感应炉熔炼的锰铜合金。本文介绍了真空感应炉熔炼锰铜合金的工艺以及控制化学成份的方法。指出了在真空熔炼过程中Mn百分含量较配入量降低0.29％,而Ni、Si百分含量稍有上升。同时对真空熔炼的锰铜合金的化学成分均匀性、加工性能进行了鉴定。本文还就化学成分(重点是硅)、冷加工减面率、成品热处理制度对锰铜合金细丝性能的影响进行了有益的探索。认为硅含量的增加,可使合金细丝a(一次温度系数)偏负:同一成分的合金拉成较细规格时a偏负,因此根据不同线径,选择不同的含硅量可获得低a的合金细丝。一股说来,冷加工使合金细丝p(电阻率)升高,a负向增大,声(二次温度系数)正向增大。减面率对成品细丝a、刀和乙(延伸率夕有一定的影响,但调整成品热处理温度和速度,可使合金细丝的a、刀、6、a,在一定范围内波动。适当地提高成品退火温度可使丝材a偏正,降低退火温度a偏负。因此选择适当的热处理制度,可获得性能最佳的锰铜合金细丝。
To stable production of φ0.02mm manganese copper alloy filament, the optional induction furnace melting manganese copper alloy. This article describes the vacuum induction furnace smelting manganese copper alloy process and the method of controlling chemical composition. It is pointed out that the content of Mn in the vacuum smelting process decreases by 0.29% compared with that in the smelting process, while the percentages of Ni and Si increase slightly. At the same time, the chemical composition uniformity and processing properties of the vacuum melting manganese-copper alloy were identified. The article also makes a useful exploration on the influence of the chemical composition (the emphasis is on silicon), the reduction of the cold working area and the heat treatment system of finished products on the properties of the filament of manganese-copper alloy. That the silicon content increases, the alloy filament a (primary temperature coefficient) is more negative: the same composition of the alloy pulled into a thinner specifications a negative, so according to different diameter, select a different silicon content can be obtained low a Alloy filament. In a word, cold work makes the alloy filament p (resistivity) rise, a negative increase, sound (secondary temperature coefficient) increases. Reducing the rate of finished filaments a, knives and B (elongation of the evening have a certain impact, but the adjustment of finished heat treatment temperature and speed, the alloy filaments can a, knife, 6, a, within a certain range of fluctuations. Increasing the annealing temperature of the finished product can make the wire a to be positive and reduce the annealing temperature a to be negative, so choosing the proper heat treatment system can obtain the best performance manganese-copper alloy filament.