基于非铝脱氧工艺的GCr15轴承钢中Ds类夹杂物控制  

Control of Ds Inclusions in GCr15 Bearing Steel Based on Non-aluminum Deoxidation Process

作　　者：王仲亮 包燕平 顾超 刘宇 黄永生 Wang Zhongliang;Bao Yanping;Gu Chao;Liu Yu;Huang Yongsheng(State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083;Zenith Steel Group Co.,Ltd.,Changzhou 213011)

机构地区：[1]北京科技大学钢铁冶金新技术国家重点实验室,北京100083 [2]中天钢铁集团有限公司,常州213011

出　　处：《特殊钢》2022年第6期8-12,共5页Special Steel

基　　金：国家自然科学基金(52174297)。

摘　　要：当前在轴承钢中氧含量已经能够控制在极低水平的情况下,Ds类夹杂物成为影响其质量稳定性的主要因素之一。为解决这一问题,本研究提出了利用非铝脱氧工艺,不使用铝作为脱氧剂,而采用硅锰预脱氧、渣面扩散脱氧、真空终脱氧、精炼过程造低碱度渣的方式生产GCr15轴承钢。与传统铝脱氧生产工艺相对比,非铝脱氧工艺轴承钢中主要夹杂物为硅酸盐,含有少量钙铝硅复合夹杂物,减少了形成Ds类夹杂物的镁铝尖晶石和钙铝酸盐,显著降低了Ds类夹杂物的含量,在轧材中能够将Ds类夹杂物稳定控制在0.5级以下,评级为0级的样品占比高达91.67%。该工艺能够获得稳定的生产效果和产品质量,并为高品质轴承钢生产提供理论及技术指导。At present,the oxygen content in bearing steel has been controlled at a very low level,and Ds inclusions have become one of the main factors affecting its quality stability.In order to solve this problem,a non-aluminum deoxygenation process is proposed to produce GCr15 bearing steel.Instead of using aluminum as deoxidizer,silicon-manganese pre-deoxidation,slag surface diffusion deoxidation,vacuum final deoxidation and low basicity slag formation in refining process are adopted.Compared with the traditional aluminum deoxidation production process,the main inclusions in the bearing steel of non-aluminum deoxidation process are silicate with a small amount of calcium aluminum-silicon composite inclusions,which reduces the magnesium aluminum spinel and calcium aluminate forming Ds inclusions,and significantly reduces the number of Ds inclusions.Ds inclusions can be stably controlled below grade 0.5 in rolled products,and the proportion of samples graded at grade 0 is as high as 91.67%.This process can obtain stable production results and product quality,which will provide theoretical and technical guidance for the production of high-quality bearing steel.

关 键 词：非铝脱氧 GCR15轴承钢 Ds类夹杂物 全流程 高品质钢 

分 类 号：TF762.4[冶金工程—钢铁冶金]