摘要
为了研究高碱度精炼渣对GCr15轴承钢夹杂物的影响规律,采用真空感应炉对GCr15轴承钢进行了重熔精炼实验,并用扫描电镜与能谱分析仪对原样和重熔样夹杂物的尺寸、形貌和化学成分进了分析。研究结果表明:经重熔精炼后各类型夹杂物尺寸均明显减小。高碱度精炼渣重熔过程中,Al_2O_3类夹杂转变为部分复合钙铝酸盐外包硫化物的Al_2O_3夹杂;初始钙铝酸盐类夹杂转变成外包硫化物的钙铝酸盐夹杂;此外,简单的硫化物夹杂转变为复合硫化物,从而在熔炼过程中更易上浮脱除。高碱度精炼作用可显著改变夹杂物形态及尺寸,提高GCr15轴承钢质量。
In order to study the influence of high basicity on the inclusion of CCr15 bearing steel,the remelting experiment has been carried out by vacuum induction furnace,and the sizes,morphology and chemical components of original and remelted CCr15 bearing steel were analyzed by SEM/EDS.The results indicated that the size of inclusion in remelted CCr15 bearing steel decreased obviously.While,during the remelting process with high basicity refining slag,the Al2O3 inclusion partially translated into calcium aluminate which enwrapped with sulfide.Moreover,the original calcium aluminate inclusion was converted to sulfide enwrapped calcium aluminate after remelting.Meanwhile,simple sulphide inclusion is converted to composite sulphide,which makes it easier to float and remove in the smelting process.Therefore,the performance of GCr15bearing steel could be increased by changing the size and type of inclusion with high basicity refining slag.
作者
王彦杰
付国强
李卓
Wang Yanjie;Fu Guoqiang;Li Zhuo(No.3 Steel rolling plant of HBIS Group Hansteel Company, Handan, Heibei, 056015;School of metallurgy and energy of North China University of Science and Technology, Tangshan,Hebei, 063009)
出处
《河北冶金》
2018年第12期13-16,共4页
Hebei Metallurgy
