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众所周知,淬火状态的高速钢是很难接受化学浸蚀的。用4％的硝酸酒精浸蚀试样的时间较长,当室温15℃左右时,一般要浸蚀6分钟左右,才能较清晰的显示出奥氏体晶粒大小。为了提高高速钢试样淬火状态显微组织的清晰度、缩短炉前金相试验的时间,在我们的生产中,进行了可控硅整流器草酸水溶液电解腐蚀制备试样的试验,通过试验证明,采用可控硅整流器草酸水溶液电解腐蚀制备试样时,
As we all know, quenched HSS is difficult to accept chemical etching. With 4% nitric acid alcohol etching sample longer, when the room temperature about 15 ℃, generally about 6 minutes etching, in order to more clearly show the austenite grain size. In order to improve the clarity of high-speed steel sample quenched microstructure and shorten the time before the furnace metallurgical test, in our production, the SCR electrolytic oxalic acid aqueous electrolytic corrosion test sample preparation, When using SCR silicon oxalic acid aqueous solution electrolytic corrosion preparation of the sample,