EA4T车轴钢脉冲电流加热带状组织的消除
Elimination of Band Structure in EA4T Axle Steel by Current Impulse Treatment
王兴安1,2, 梁益龙1,2
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作者单位：1.贵州大学 材料与冶金学院, 贵州 贵阳 550003; 2. 贵州省材料结构与强度重点实验室, 贵州 贵阳 550003
中文关键字：EA4T车轴钢； 脉冲电流； 热模拟； 带状组织
英文关键字：EA4T axle steel; current impulse; thermal simulation; band structure
中文摘要：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。
英文摘要：In order to eliminate the band structure in EA4T axle steel, the current impulse heat treatment of EA4T axle steel was studied. Specimens were cooled down according to the thermal simulatied central curve of the entire axle. The results show that the band structure is eliminated by current impulse treatment, and the amount of proeutected ferrite reduces and the block size is refined. Meanwhile, the homogeneity of microstructure increases.