车辆齿轮用H20CrMnTi-2圆钢氮化钛夹杂控制
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摘要
介绍了邯钢一炼钢厂"铁水→转炉初炼→LF精炼+RH精炼→200 mm×200 mm方坯连铸"生产齿轮钢的工艺流程。针对H20CrMnTi-2齿轮钢氮化钛夹杂含量超标的问题,从控制钢水中氮含量和钛含量两方面着手,有效降低了TiN夹杂含量,实现了连铸过程齿轮钢的增氮量降到10×10~(-6)以下,H20CrMnTi-2圆钢B类(氮化钛夹杂)夹杂含量稳定控制的2.5级以下。
The technological process of gear steel from " hot metal-converter primary refining-LF refining+ RH refining-200 mm × 200 mm billet continuous casting" in Hansteel is introduced. In viewof the excessive content of titanium nitride inclusion in H20CrMnTi-2 gear steel,through controlling the nitrogen content and titanium content in molten steel,the inclusion content of TiN is effectively reduced,and the nitrogen increasing of gear steel in the continuous casting process is reduced to less than 10 × 10~(-6),and the inclusion content of H20CrMnTi-2 round steel B( titanium nitride inclusion) is under the level of 2.5.
The technological process of gear steel from " hot metal-converter primary refining-LF refining+ RH refining-200 mm × 200 mm billet continuous casting" in Hansteel is introduced. In viewof the excessive content of titanium nitride inclusion in H20CrMnTi-2 gear steel,through controlling the nitrogen content and titanium content in molten steel,the inclusion content of TiN is effectively reduced,and the nitrogen increasing of gear steel in the continuous casting process is reduced to less than 10 × 10~(-6),and the inclusion content of H20CrMnTi-2 round steel B( titanium nitride inclusion) is under the level of 2.5.
引文
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[4]丁礼权,范植金,罗国华,等.120 t BOF-LF-CC流程生产20Cr M n Ti齿轮钢旳工艺实践[J].特殊钢,2014,(2):40~42.
[5]周德光,罗伯钢,曾立,等.钢中氮的控制及其对质量的影响[J].炼钢,2005,(1):43~46.
[6]薛正良,吴映江,吴丽嘉,等.BOF-LF-RH-CC流程钢液增氮控制研究[J].武汉科技大学学报,2011,(2):86~88.
[2]雍兮,曹存根,张利平,等.20Cr Mn Ti钢钛、氮含量的计算机优化设计及其应用[J].工程机械材料,2010(12):80~83.
[3]田新中,刘润藻,周春芳,等.轴承钢中Ti N夹杂物的控制研究[J].北京科技大学学报,2009,(S1):150~153.
[4]丁礼权,范植金,罗国华,等.120 t BOF-LF-CC流程生产20Cr M n Ti齿轮钢旳工艺实践[J].特殊钢,2014,(2):40~42.
[5]周德光,罗伯钢,曾立,等.钢中氮的控制及其对质量的影响[J].炼钢,2005,(1):43~46.
[6]薛正良,吴映江,吴丽嘉,等.BOF-LF-RH-CC流程钢液增氮控制研究[J].武汉科技大学学报,2011,(2):86~88.