The hair lines of 45 steel driving axle when quenching and tempering was analysed by heat etching, chemical analysis and metallographic.
本文采用热酸浸蚀试验，化学成份分析和金相分析等手段，对45钢轴所出现的发纹进行分析。
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Consequently, it is feasible to determine electro-etching method as the sample preparation method about quantitative metallographic analysis in CuCrRE alloy.