MgO耐火材料对轴承钢中夹杂物的影响
Effect of MgO Refractory on Inclusions in Bearing Steel
利用实验室硅钼炉使工业用MgO耐火材料和轴承钢在 1873K温度和Ar气氛保护条件下以 120 rpm旋转速度进行动态反应60 min,研究MgO耐火材料和轴承钢界面形貌和成分,和钢中夹杂物成分和数量的变化。结果表明:MgO耐火材料和轴承钢动态反应在界面处会生成CaO-Al2O3或MgO-Al2O3,反应后的夹杂物平均成分几乎没有变化,主要是Al2O3含量较高的CaO-Al2O3和MgO-Al2O3夹杂物,夹杂物数密度会由12.18/mm2降低至1.74/mm2。
Industrial MgO refractory reacted with the bearing steel dynamically for 60 min at 120 rpm under 1873K and Ar atmosphere by using the laboratory silicon-molybdenum furnace.The interfacial morphology and composition between the MgO refractory and the bearing steel and the changes of the composition and the number density of inclusions in the steel were studied.The results show that CaO-Al2O3 or MgO-Al2O3 are formed at the interface when the MgO refractory reacted with the bearing steel dynamically.The average composition of inclusions is almost unchanged and is the CaO-Al2O3 and MgO-Al2O3 inclusions with high Al2O3 content.The number density of inclusions decreases from 12.18/mm2 to 1.74/mm2.
程玉杰;任强;张立峰;
燕山大学机械工程学院,秦皇岛 066004;燕山大学机械工程学院,秦皇岛 066004;北方工业大学机械与材料工程学院,北京 100144;
MgO refractory bearing steel inclusion
589-593 / 5
评论