Effect of electromagnetic stirring on metallurgical quality of GCr15 electroslag ingot  

作　　者：Xiao-fang Shi Tao Xu Li-zhong Chang 

机构地区：[1]School of Metallurgy Engineering,Anhui University of Technology,Ma'anshan 243002,Anhui,China [2]Anhui Fukai Special Material Co.,Ltd.,Jixi 245300,Anhui,China

出　　处：《China Foundry》2022年第1期46-54,共9页中国铸造（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(51774003/52074002/51974002);the Ministry of Industry and Information Technology(TC190A4DA-35)。

摘　　要：To further improve the metallurgical quality of electroslag remelting,remove the large inclusions in electroslag ingot and refine the solidification structure of electroslag ingot,an electroslag remelting furnace with electromagnetic stirring was designed,and the influence of different magnetic induction intensities on metallurgical quality of GCr15 electroslag ingot was studied.Inclusions with different sizes and types were analyzed by an ASPEX scanning electron microscope,and the morphology and composition of inclusions were further observed by a JSM-6510LV scanning electron microscope.The distribution of alloying elements on the cross section of electroslag ingot was analyzed by original position analysis(OPA).The results show that whether or not electromagnetic stirring is used,the inclusions in electroslag ingot are mainly composed of Al_(2)O_(3),MnS,MnS-oxide and other oxides,among which Al_(2)O_(3) is the most.Compared with an electroslag ingot without electromagnetic stirring,the number of inclusions decreases considerably,and the proportion of small inclusions increases while the proportion of large inclusions decreases when the electromagnetic stirring with remelting current of 1.1 kA and magnetic induction intensity of 62 Gs is applied.However,excessive electromagnetic force will cause the number and diameter of inclusions to increase again.Electromagnetic stirring has different effects on the segregation of different elements.Under the experimental conditions,the weak electromagnetic force with 1.1 kA and magnetic induction intensity of 108 Gs has little effect on the segregation of C,but decreases the segregation of P,and the excessive electromagnetic force aggravates the segregation of alloy elements.

关 键 词：electroslag remelting electromagnetic stirring INCLUSION solidification SEGREGATION GCr15 bearing steel 

分 类 号：TG142.72[一般工业技术—材料科学与工程]