论文部分内容阅读
接触点焊用的焊极材料,种类很多,常用的有M_1紫铜、爱凡合金、高镍-铬量(超过20％以上)不锈钢、钨块、钼块等。前二种寿命不长,后三种来源不易;并且钨块及钼块由於导电率较小,用作焊极,易生龟裂,寿命也就不长。为此,我厂中央试验室以粉末冶金方法制造80％钨、20％铜的假合金,用作焊极。经过几次的压制和改进,它的寿命估计能达8000～12000个焊点,比爱凡合金大14倍。兹将制造方法简述如下:一、原材料的准备铜粉可用电解法制成;或用锌板在硫酸铜溶液中取代而得,经多次冲洗后,烘干得淡玫瑰色粉末,它的粒度大小可借调整硫酸铜溶液的浓度而得。制造铜-钨合金的铜粉,希望在150目以上。铜粉极易氧化,烘干时如温度稍高,色泽立即变暗。
Contact point welding with the electrode material, many types commonly used in M_1 red copper, love where alloy, high nickel - chromium (more than 20%) stainless steel, tungsten, molybdenum and so on. The first two kinds of life is not long, the latter three sources is not easy; and tungsten and molybdenum block due to the smaller conductivity for the welding electrode, prone to cracking, life expectancy is not long. To this end, our factory Central Laboratory to powder metallurgy 80% tungsten, 20% copper pseudo-alloy, used as a welding electrode. After several suppression and improvement, it is estimated that life expectancy of 8000 to 12,000 solder joints, 14 times larger than Ai Fan alloy. The manufacturing method will be briefly described as follows: First, the preparation of raw materials Copper can be made by electrolysis; or use zinc plate in the copper sulfate solution derived from, after repeated washing, dried to pale rose powder, its particle size The size can be adjusted by adjusting the concentration of copper sulfate solution derived. Manufacture of copper - tungsten alloy copper powder, hope in more than 150 mesh. Copper oxide easily oxidized, drying, such as the temperature is slightly higher, the color immediately darken.