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随着无线电技术的发展,直径小于1毫米的高熔点稀有金属丝与导电导热性能好的有色金属丝以及同种或异种的有色金属丝的对焊,已日益增多。钽丝与镍丝的对焊就是其中的一种。通常要求焊成的焊点质量稳定、强度高、导电性好和外形美观。钽丝与镍丝的对焊困难较多,如在一定温度下钽与镍都能吸收气体,随着温度升高吸气量增加,吸气后的钽与镍性能较脆。钽与镍熔点差别大,前者为2850℃,后者为1440℃。除此之外,焊件直径小,也给焊接带来一定的困难。
With the development of radio technology, the welding of rare-earth high-melting-point metal wires smaller than 1 mm in diameter and non-ferrous metal wires with good thermal and electrical conductivity as well as non-ferrous metal wires of the same or different kinds has been increasing. Tantalum wire and nickel wire butt welding is one of them. Solder joints generally require stable quality, high strength, good electrical conductivity and aesthetic appearance. Tantalum wire and nickel wire welding more difficult, such as tantalum and nickel can absorb gas at a certain temperature, as the temperature increases the amount of inhalation, after inhalation of tantalum and nickel performance more brittle. Tantalum and nickel melting point difference, the former is 2850 ℃, the latter is 1440 ℃. In addition, the weldment diameter is small, but also to the welding to bring some difficulties.