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通过不同冶炼方法得到了分别含有0.001S%、0.004S%和0.016S%的试验钢,利用定量金相、扫描电镜和能谱分析等方法,获得了夹杂物特征参数,研究了该试验钢的冲击韧性。结果表明,随着硫含量地降低,夹杂物体积分数和尺寸减小,夹杂物间距增加;夹杂物类型和体积分数对高温回火钢板冲击韧性影响较大,对低温回火钢板冲击韧性影响较小;400℃以下回火时,该试验钢的冲击吸收功区别不大;回火温度超过400℃时,随着夹杂物体积百分数地增加,冲击吸收功明显降低。
The test steel containing 0.001S%, 0.004S% and 0.016S%, respectively, was obtained by different smelting methods. The characteristic parameters of inclusions were obtained by quantitative metallography, scanning electron microscopy and energy spectrum analysis. Impact toughness. The results show that with the decrease of sulfur content, the inclusion volume fraction and size decrease, the inclusion spacing increases; inclusion type and volume fraction have a greater impact on the impact toughness of high temperature tempered steel plate, impact toughness of low temperature tempered steel plate When the tempering temperature is below 400 ℃, the impact absorption work of the test steel is not much different. When the tempering temperature exceeds 400 ℃, the impact absorption workability decreases obviously with the increase of volume fraction of inclusions.