Modification Effect and Mechanism of La-Ce on Inclusions in GCr15 Bearing Steel

doi:10.20057/j.1003-8620.2023-00234

Abstract

Abstract: In order to investigate the effect of Rare Earth La-Ce on the modification of inclusions in GCr15 bearing steel， a high-temperature tube furnace with a nominal capacity of 1 kg was used to smelt 6 heats of GCr15 bearing steel ingots with different La-Ce contents. Characterization methods such as optical microscopy and scanning electron microscopy were used， and the transformation law of inclusions in GCr15 steel at different La-Ce contents was studied using FactSage thermodynamic software. The results show that the typical inclusions in GCr15 bearing steel without adding La-Ce are Al₂O₃and MnS， and the addition of La-Ce will modify it to more complex Rare Earth inclusions. With the increase of La-Ce content， the transformation law of inclusions in steel at 1 600 ℃ is Al₂O₃→REAlO₃→ RE₂O₃→ RE₂O₂S → RE₂O₂S + RE_xS_y（RE is La、Ce）. With the increase of La-Ce content， the density of inclusions and the average aspect ratio in the steel both decrease first and then increase. When the La-Ce content is 96 ×10^-6， Al₂O₃ and MnS were both transformed into spherical RE₂O₂S·RE_xS_ycomposite rare earth inclusions. The number of inclusions in the steel was at a low level and the overall morphology of the inclusions was well controlled.

Key words: GCr15 Bearing Steel, Rare Earth, Inclusion Modification, Thermodynamic Calculations

摘要： 为了探究稀土La-Ce对GCr15轴承钢中夹杂物的改质效果，采用了公称容量为1 kg的高温管式炉，冶炼了6炉不同La-Ce含量的GCr15轴承钢钢锭，借助光学显微镜、扫描电镜等表征手段，并结合FactSage热力学软件对不同La-Ce含量的GCr15钢中夹杂物的转化规律进行研究。结果表明，未添加La-Ce的GCr15轴承钢中典型夹杂物为不规则状的Al₂O₃和MnS，La-Ce的添加会将其改质为类型较为复杂的稀土夹杂物，随着La-Ce含量的提高，1600 ℃下钢中夹杂物的转化规律为Al₂O₃→REAlO₃→ RE₂O₃→ RE₂O₂S → RE₂O₂S + RE_xS_y（RE为La-Ce）。当La-Ce含量为96×10^-6时，Al₂O₃和MnS均被改质为球状的RE₂O₂S·RE_xS_y复合稀土夹杂物，钢中夹杂物的数量处于较低水平且夹杂物的整体形貌控制较好。

关键词: GCr15轴承钢, 稀土, 夹杂物改质, 热力学计算

CLC Number:

TG142

Wu Xiangyu, Dong Bingcheng , Wang Zifei, Tian Qianren, Fu Jianxun. Modification Effect and Mechanism of La-Ce on Inclusions in GCr15 Bearing Steel[J]. Special Steel, 2024, 45(2): 39-45.

吴翔宇, 董丙成, 王梓菲, 田钱仁, 付建勋. La-Ce对GCr15轴承钢中夹杂物的改质效果及机理[J]. 特殊钢, 2024, 45(2): 39-45.

References

［1］尹　啸，雷书伟，徐　曦，等 . 改善高碳铬轴承钢碳化物均匀性研究［J］. 上海金属，2022，44（6）：78-85+91.
［2］刘耀中，范崇惠. 高碳铬轴承钢滚动轴承零件热处理技术发展与展望［J］. 金属热处理，2014，39（1）：53-57.
［3］邹　涛，王　鹏，董艳伍，等. Ce-Mg合金加入对GCr15轴承钢夹杂物和凝固组织的影响［J］. 特殊钢，2022，43（6）：1-7.
［4］Hashimoto K， Fujimatsu T， Tsunekage N， et al. Study of rolling contact fatigue of bearing steels in relation to various oxide inclusions［J］. Materials & Design，2011，32（3）：1605-1611.
［5］蒋鲤平，徐建飞，王昆鹏，等 . 高碳铬 GCr15 轴承钢中镁铝夹杂物形成与控制工艺实践［J］. 特殊钢，2022，43（4）：41-45.
［6］Mayer H， Haydn W， Schuller R， et al. Very high cycle fatigue properties of bainitic high carbon – chromium steel［J］. International Journal of Fatigue，2009，31（2）：242-249.
［7］尉　政，任　英，任　强，等 . 镁对 GCr15 轴承钢中夹杂物及奥氏体晶粒的影响［J］. 钢铁，2023，58（7）：133-143.
［8］屈志东，杨　博，孟晓玲，等. 钢液Ca含量控制对Ds夹杂物的影响研究［J］. 炼钢，2023，39（3）：79-85.
［9］Pan F， Zhang J， Chen H L， et al. Thermodynamic calculation among cerium， oxygen， and sulfur in liquid iron［J］. Scientific Reports，2016，6：35843.
［10］Wang H P， Xiong L， Zhang L， et al. Investigation of RE-O-S-As inclusions in high carbon steels［J］. Metallurgical and Materials Transactions B，2017，48（6）：2849-2858.
［11］Bohlen J， Yi S， Letzig D， et al. Effect of rare earth elements on the microstructure and texture development in magnesium–manganese alloys during extrusion［J］. Materials Science and Engineering： A，2010，527（26）：7092-7098.
［12］Li H， Yu Y C， Ren X， et al. Evolution of Al2O3 inclusions by cerium treatment in low carbon high manganese steel［J］. Journal of Iron and Steel Research， International，2017，24（9）：925-934.
［13］Ren Q， Zhang L F. Effect of cerium content on inclusions in an ultra-low-carbon aluminum-killed steel［J］. Metallurgical and Materials Transactions B，2020，51（2）：589-600.
［14］刘　鑫，朱林林 . 稀土对 GCr15 轴承钢超高周疲劳性能的影响［J］. 特钢技术，2023，29（2）：7-10.
［15］杨超云，栾义坤，李殿中，等. 稀土元素对高洁净度轴承钢中夹杂物的影响研究［J］. 炼钢，2016，32（4）：54-59+72.
［16］高金柱 . 稀土处理电炉 H13 钢的组织与性能研究［D］. 安徽：中国科技大学，2015.
［17］杨超云 . 稀土对高碳铬轴承钢夹杂物-组织-性能的影响机理研究［D］. 安徽：中国科技大学，2020.
［18］董大西，杨超云，胡云生，等. 高洁净轴承钢中稀土变质夹杂物行为分析［J］. 中国冶金，2020，30（6）：30-38.
［19］王　承 . 稀土镧和镁对典型特殊钢洁净度和性能的影响［D］.沈阳：东北大学，2017.
［20］Knacke O， Kubaschewski O， Hesselmann K. Thermochemical properties of inorganic substances ［A］. Springer-Verlag.

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