低频电源频率对GCr15电渣锭中液析碳化物的影响  

Effect of low frequency power supply frequency on liquidus carbides in GCr15 electroslag ingot

作　　者：苏云龙 朱春丽 张龙飞 王蒙俊 项淼苗 施晓芳 常立忠 Su Yunlong;Zhu Chunli;Zhang Longfei;Wang Mengjun;Xiang Miaomiao;Shi Xiaofang;Chang Lizhong(School of Metallurgy Engineering,Anhui University of Technology,Ma’anshan 243002,Anhui,China)

机构地区：[1]安徽工业大学冶金工程学院,安徽马鞍山243002

出　　处：《钢铁钒钛》2023年第2期179-186,共8页Iron Steel Vanadium Titanium

基　　金：国家自然科学基金资助(51974002/52074002);安徽省自然科学基金资助(2208085J37)。

摘　　要：为了进一步提高电渣锭的凝固质量,设计了低频电渣重熔炉,研究了不同频率对电渣锭中液析碳化物的影响。采用扫描电镜观察了液析碳化物的形貌、成分,并在光学显微镜下观察了GCr15轴承钢电渣锭中液析碳化物的尺寸变化。研究结果表明,相比于工频时,低频可以有效降低碳化物数量,特别是对于边部和2/3R处,碳化物数量下降幅度较大,在频率为0.4 Hz时下降幅度最大,分别为71.05%和48.00%。不管是边部、芯部还是2/3R处,低频均能降低液析碳化物的最大尺寸。特别是对边部和2/3R处碳化物的影响最大,边部最大尺寸从工频时的11.64μm减小至0.4 Hz时的7.39μm,减小了36.51%;2/3R处最大尺寸从工频时的20.58μm减小至0.4 Hz时的12.61μm,减小了38.73%。In order to further improve the solidification quality of electroslag ingot,a low frequency electroslag remelting furnace was designed to study the effect of different frequencies on liquid carbides in electroslag ingot.The morphology and composition of liquidated carbides were observed by scanning electron microscopy,and the size change of liquidated carbides was observed and analyzed under an optical microscope.The results show that the number of carbides can be effectively reduced at low frequency compared with that at power frequency,especially at the edge and at the edge of 2/3R where the number of carbides decreases significantly at 0.4 Hz,the maximum decrease amplitude is 71.05%and 48.00%.Whether it is in edge,heart,or 2/3R,low frequency can reduce the maximum size of liquid carbides.Especially for the edge and 2/3R carbides,the maximum size of the edge decreases from 11.64μm at power frequency to 7.39μm at 0.4 Hz,which is reduced by 36.51%.The maximum size at 2/3R is reduced by 38.73%from 20.58μm at power frequency to 12.61μm at 0.4 Hz.

关 键 词：电渣重熔 低频电源 轴承钢 液析碳化物 凝固 

分 类 号：TF142[冶金工程—冶金物理化学] TF76