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为了研究高合金钢和耐热合金的金相组织,需要用高倍光学显微镜和电子显微镜观察相的形状和分布。因此,用机械抛光或手抛光金相试样时,组织易产生假象也费时间,质量不易保证。需要用电解抛光来代替。电解抛光的设备很简单,用国产半导体硅整流器为直流电源、500毫升烧杯为电解槽、用稍小于烧杯直径的不锈钢圆板为阴极,将它放在烧杯底上,杯内放一温度计,烧杯用冰冷却、用直流电压表和电流表测量端压和电流。整个装置如图所示。
In order to study the high-alloy steel and heat-resistant alloy microstructure, the need to observe the shape and distribution of the phase with high power optical microscope and electron microscope. Therefore, the use of mechanical polishing or hand polished metallographic specimens, the organization easy to produce artifacts also take time, quality is not easy to guarantee. Need to use electrolytic polishing instead. Electrolytic polishing equipment is very simple, with a homemade semiconductor silicon rectifier DC power supply, 500 ml beaker for the electrolysis tank, with a slightly smaller than the beaker diameter stainless steel circular plate as the cathode, it will be placed on the bottom of the beaker, the cup put a thermometer, beaker Cool with ice and measure the terminal pressure and current with a DC voltmeter and ammeter. The whole device as shown.