废钢+铁水-50 t EAF-LF-VD流程GCr15轴承钢中的非金属夹杂物行为

特殊钢 ›› 2014, Vol. 35 ›› Issue (4): 44-47.

废钢+铁水-50 t EAF-LF-VD流程GCr15轴承钢中的非金属夹杂物行为

杨密平^1,2, 吴兵^1,2, 林腾昌², 安杰¹, 马传庆¹

1山东钢铁股份有限公司莱芜分公司特钢事业部，莱芜271105；
2北京科技大学冶金与生态工程学院，北京100083

收稿日期:2014-03-03 出版日期:2014-08-01 发布日期:2022-09-03
作者简介:杨密平(1979-),男，硕士(北京科技大学)，工程师,2004年安徽工业大学毕业,特殊钢工艺技术研究。

Behavior of Non-Metallic Inclusions in GCr15 Bearing Steel Steelmaking by Scrap + Hot Metal-50 t EAF-LF-VD Flow Sheet

Yang Miping^1,2, Wu Bing^1,2, Lin Tengchang², An Jie¹, Ma Chuanqing¹

1 Special Steel Division, Laiwu Branch, Shandong Iron and Steel Corp Ltd, Laiwu 271105
2 School of Metallurgical and Ecological Engineering, University of Science and Technology, Beijing 100083

Received:2014-03-03 Published:2014-08-01 Online:2022-09-03

摘要/Abstract

摘要： 通过50 t EAF配加30~40 t铁水和12~16 t优质废钢,EBT无渣出钢,加150~200 kg钢芯铝预脱氧,LF用SiC扩散脱氧,控制精炼渣碱度4.0~5.9, VD前后软吹氩、连铸保护浇铸和电磁搅拌等工艺措施,GCr15轴承钢轧材中的氧含量为8×10^-6~9×10^-6。分析结果表明,LF前至VD后钢中夹杂物尺寸一般≤10μm,最大尺寸40μm,大部分夹杂物尺寸为3~6μm; LF前主要夹杂物为Al₂O₃,镁铝尖晶石,硫化物,Cr₂O₃, TiO₂; VD前后为镁铝尖晶石,CaS和MgO。

Abstract: With process measures including charging 30 ~40 t hot metal and 12 〜16 t quality scrap in 50 t EAF, EBT slag free tapping and adding 150 ~200 kg steel-clad aluminum to pre-deoxidize, diffusion deoxidation by SiC and controlling refining slag basicity 4.0 ~6.9 in LF process, soft argon blowing before and after VD, shielding casting and electromagnetic stirring in casting process, the total oxygen content in rolled products of bearing steel GCrl5 is 8 x 10^-9 x 10^-6. Analysis results show that the size of inclusions in steel before LF and after VD is generally ≤ 10 μm, maximum size is 40 and the sizes of most inclusions are 3 ~ 6 μm; before LF process the main inclusions in steel are Al₂O₃, magnesia alumina spinal, sulfide, Cr₂O₃ and TiO₂, before and after VD the main inclusions in steel are magnesia alumina spinal, CaS and MgO.

杨密平, 吴兵, 林腾昌, 安杰, 马传庆. 废钢+铁水-50 t EAF-LF-VD流程GCr15轴承钢中的非金属夹杂物行为[J]. 特殊钢, 2014, 35(4): 44-47.

Yang Miping', Wu Bing, Lin Tengchang , An Jie, Ma Chuanqing. Behavior of Non-Metallic Inclusions in GCr15 Bearing Steel Steelmaking by Scrap + Hot Metal-50 t EAF-LF-VD Flow Sheet[J]. Special Steel, 2014, 35(4): 44-47.