针对国产EA4T车轴钢存在的带状组织问题,采用脉冲电流加热方法对EA4T车轴钢试样进行试验,并按照热模拟整轴心部冷却曲线进行冷却。结果表明,通过电炉加热和脉冲电流加热的复合处理,可部分消除带状组织,先共析铁素体量明显减少,块尺寸细化,组织均匀性显著提高。 Aiming at the ribbon structure problem of domestic EA4T axle steel, the EA4T axle steel samples were tested by pulse current heating method and cooled according to the thermal simulation of the entire shaft center cooling curve. The results show that the strip-shaped structure can be partially eliminated by the combination of electric furnace heating and pulse current heating. The amount of pro-eutectoid ferrite is significantly reduced, the size of the block is refined, and the uniformity of the microstructure is significantly improved.