改善34CrNiMo6含硫电渣钢B类夹杂物的工艺实践

特殊钢 ›› 2017, Vol. 38 ›› Issue (1): 39-41.

改善34CrNiMo6含硫电渣钢B类夹杂物的工艺实践

马群¹，孙常亮²，冯桂萍¹，张晓磊³

抚顺特殊钢股份有限公司1技术中心;2技术处;3第三炼钢厂，抚顺113001

收稿日期:2016-08-21 出版日期:2017-02-01 发布日期:2022-07-28
作者简介:马群(1981-),男，工程师,2005年内蒙古工业大学(本科)毕业,合金结构钢工艺技术研究。

Process Practice for Improvement of B-Type Inclusions in ESR Sulfur-Bearing Steel 34CrNiMo6

Ma Qun¹ , Sun Changliang², Feng Guiping¹ ， Zhang Xiaolei³

1 Technology Center ； 2 Department of Technology ；3 No3 Steelmaking Works, Fushun Special Steel Co Ltd, Fushun 113001

Received:2016-08-21 Published:2017-02-01 Online:2022-07-28

摘要/Abstract

摘要： 34CrNiMo6钢（/%:0.30~0.38C,0.50~0.80Mn,≤0.40Si,0.015~0.035S,≤0.035P,1.30~1.70Ni,1.30~1.70Cr,0.15~0.30Mo）的冶金流程为30 t EAF-LF-VD-浇铸Φ470 mm电极-3.6 t ESR锭（Φ610 mm）-锻成Φ280 mm棒材。在分析冶炼过程中影响钢中B类夹杂物级别因素的基础上,通过将电极氧含量从20×10^-6降至11×10^-6、同时电极S含量由0.035%提高到0.045%,进而减少重熔过程FeS等附加剂的添加量,将萤石-Al₂O₃-SiO₂-MgO重熔渣系中萤石由45%提高到60%及SiO₂由15%降低到5%等措施,生产钢材的B类夹杂物级别由原先的2.5级降至≤1.5级,并且钢中硫分布均匀适中,保证了电渣钢的质量。

Abstract: The metallurgical flowsheet of steel 34CrNiMo6 (/% : 0. 30 ~0. 38C, 0.50 〜0. 80Mn, ≤0. 40Si, 0.015 ~0.035S, ≤0.035P, 1.30 〜1.70Ni, 1. 30 〜1.70Cr, 0. 15 ~0. 30Mo) is 30 t EAF-LF-VD-casting Φ70 mm electrode- 3. 6 t ESR ingot (Φ 610 mm)- forged to Φ280 mm round bar. Based on analysis the factors to influence rating of B-type inclusions in steel during steelmaking process, with using the measures including decreasing the oxygen content in electrode from original 20 x 10 to 11 x 10 ^-6and increasing the S content in electrode from 0.035% to 0.045% to decrease the adding amount of FeS etc additives during ESR process, increasing the fluorite content in fluorite-Al₂O₃ -SiO₂ -MgO ESR slag series from 45% to 60% and decreasing the SiO₂ from 15% to 5% , the rating of B-type inclusions in round bar decreases from original 2. 5 to ≤ 1. 5 and the distribution of sulfur in steel uniform to insure the quality of ESR steel.

Key words: , 30 t EAF-LF-VD, ESR, Sulfur-Bearing Steel 34CrNiMo6, Chemical Composition, B-Type Inclusions

马群, 孙常亮, 冯桂萍, 张晓磊. 改善34CrNiMo6含硫电渣钢B类夹杂物的工艺实践[J]. 特殊钢, 2017, 38(1): 39-41.

Ma Qun , Sun Changliang, Feng Guiping , Zhang Xiaolei. Process Practice for Improvement of B-Type Inclusions in ESR Sulfur-Bearing Steel 34CrNiMo6[J]. Special Steel, 2017, 38(1): 39-41.