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摘要: 针对90 t电转炉生产轴承钢GCr15时,成品氮含量偏高的问题,在对生产过程中氮含量变化行为进行统计分析的基础上,对出钢、LF精炼、VD真空处理各工序的氮含量主要影响因素进行了分析讨论,提出氮含量控制最佳工艺参数。通过采取措施,LF进站时钢液中平均w(N)降低7.2×10-6,精炼平均增氮质量分数降低32.2 %,VD脱氮率则由20.2 %提升至29.2 %,而中包成品样平均w(N)则由49.7×10-6降低至35.7×10-6。
关键词: 电转炉, GCr15轴承钢, 氮含量
Abstract: Based on the statistical production data,indicating a relatively high nitrogen content of bearing steel GCr15 produced by 90 t EAF-converter, the main effects on the nitrogen content of molten steel at such stages as tapping, LF refining and VD treatment of steelmaking were analyzed, and the optimized process parameters were proposed to control the nitrogen content. Taking the advantage of the measures for nitrogencontrolling, the average nitrogen content before LF refining decreased by 7.2×10-6, the nitrogen pickup during LF refining reduced by 32.2 %, while the nitrogen desorption rate of VD furnace increased from 20.2 % to 29.2 %, and the nitrogen content of molten steel in tundish could be decreased from 49.7×10-6 to 35.7×10-6.
Key words: EAF-converter, GCr15 bearing steel, nitrogen content
高宇波,万文华,王日红,华建民,刘宪民,祝宜明. 电转炉冶炼GCr15钢氮含量的过程控制[J]. 炼钢.
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链接本文: http://journal05.magtechjournal.com/Jwk3_gt/lg/CN/
http://journal05.magtechjournal.com/Jwk3_gt/lg/CN/Y2015/V31/I4/6