炼钢 ›› 2017, Vol. 33 ›› Issue (4): 1-11.
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摘要: 根据国内外文献总结提出21世纪特殊钢质量提升的重点从洁净钢冶炼转移到大型夹杂物控制,特别应加强硫化物控制。最大夹杂物尺寸对钢材疲劳性能有明显影响,当w(T.O)≤5×10-6时硫化物影响最大。大型夹杂物主要来源于渣钢反应产生的MgO-Al2O3和CaO-Al2O3夹杂以及卷渣形成的CaO-SiO2-Al2O3系夹杂。控制大型夹杂物必须改进生产工艺:降低炉外精炼负荷、改变脱氧工艺、严格控制卷渣和促进连铸过程夹杂物上浮。
关键词: 特殊钢, 轴承钢, 夹杂物, 精炼
Abstract: From the summary on domestic and international development in special steels, it can be seen that the focal point for quality improvement has been transferred from cleansteel refining technology to largesizeinclusion controltechnology, especially to the sulfide control. The maximum size of inclusions affects the fatigue property of special steels obviously, and when the total oxygen content w(T.O)≤5×10-6,the influence of sulfide is most serious. The large size inclusions are mainly originated from MgO-Al2O3 and CaO-Al2O3 by slagmelt reaction, as well as from CaO-SiO2-Al2O3 by involved slag. To control the large-size inclusions, the following process technologies must be improve: lower down the operating load of refining process, optimize deoxidation process, control slag-involving strictly, and promote inclusions floating upward during continuous casting.
Key words: special steel, bearing steel, inclusion, refining
刘 浏. 特殊钢发展新趋势与工艺创新[J]. 炼钢, 2017, 33(4): 1-11.
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http://journal05.magtechjournal.com/Jwk3_gt/lg/CN/Y2017/V33/I4/1