PMO对M2高速钢连铸坯凝固组织及碳化物析出的影响

doi:10.12066/j.issn.1007-2861.2678

Abstract

Abstract: Regarding M2 high-speed steel continuous-cast billets,the carbide’s size,distribution,and morphology not only directly influence subsequent processes like rolling,but also exert a significant impact on the performance and quality of the final product.A thermal simulation test machine is utilized in this study for dendritic growth in continuous cast billets to explore the effect of pulse magneto-oscillation （PMO） solidification refinement technology on the carbide precipitation and growth process in M2 high-speed steel billets.The possibility and conditions for using PMO technology to improve the carbides in continuous cast M2 high-speed steel are also discussed.The thermal simulation results indicate that PMO can refine the solidification microstructure.Under peak current conditions of0,120,240,and 360 K_IA,the secondary dendrite arm spacing at the solidification end decreased by 3.08,3.83,and 6.91μm,respectively.At the same time,the macro-distribution of C,W,and Cr elements became more uniform.The thermal simulation quenching tests show that PMO technology can effectively reduce the area fraction of carbides and decrease the size of carbide network intersections.The lowest carbide area fraction was observed at360 K_IA,while the smallest carbide network intersection size was found at 240 K_IA.Thermodynamic calculations indicate that without PMO treatment,the solid-phase fraction of Mo₂C and W₂C precipitated at the solid-liquid interface was 0.921 and 0.972,respectively.With PMO treatment,the precipitated solid phase fractions of Mo₂C and W₂C at the solid-liquid interface reach 0.931 and 0.988 respectively,while the morphology of M₂C（M=Mo/W） transitions from lamellar to fibrous-like structure.On the one hand,PMO treatment refines the solidification microstructure and weakens element enrichment,and on the other hand,it lowers the carbide precipitation temperature.These two effects result in smaller carbides.

Key words: M2 high-speed steel, continuous casting, pulse magnetic-oscillation, carbides, thermal simulation

CLC Number:

TG249.7

ZHU Shouhao, LIU Haining, XU Zhishuai, LI Zhicong, CHEN Xiangru, ZHAI Qijie. The effect of PMO on the solidification microstructure and carbide precipitation of M2 high-speed steel continuous cast billets[J]. Journal of Shanghai University（Natural Science Edition）, 2025, 31(3): 403-419.

References

[1] Karagoz S, Fischmeister H F. Cutting performance and microstructure of high speed[J].Metallurgical and Materials Transactions A, 1998, 29:205-216.
[2] 吴红庆,吴晓春.国内外高速钢的研究现状和进展[J].模具制造, 2017, 17(12):93-100.
[3] 冯利民,何哲秋,胡剑南,等.高速钢表面类金刚石薄膜的掺氮改性研究[J].上海金属, 2024, 46(3):38-43.
[4] 初伟,谢尘,吴晓春.电渣重熔M2高速钢共晶碳化物控制研究[J].上海金属, 2013, 35(5):23-26.
[5] Romano P, Velasco F J, Torralba J M, et al. Processing of M2 powder metallurgy highspeed steel by means of starch consolidation[J]. Materials Science and Engineering A, 2006,419(1/2):1-7.
[6] 龚永勇.脉冲磁致振荡凝固细晶技术基础研究[D].上海:上海大学, 2008.
[7] 仲红刚,刘海宁,徐智帅,等.脉冲磁致振荡凝固均质化技术及装备[J].钢铁, 2019, 54(8):174-180.
[8] 龚永勇,程书敏,钟玉义,等.脉冲磁致振荡凝固技术[J].金属学报, 2018, 54(5):757-765.
[9] 杨阳,黄雁,刘海宁,等.采用PMO改善20CrMnTi钢的凝固组织和偏析研究[J].上海金属, 2025,47(1):67-75.
[10] 徐衡,李莉娟,蔡常青,等.应用结晶器PMO提高连铸小方坯质量研究[J].上海金属, 2019, 41(4):75-79.
[11] 郝军利,赵静,仲红刚,等.PMO作用下连铸二冷区电磁场-流场-温度场的数值模拟[J].上海大学学报(自然科学版), 2018, 24(3):412-420.
[12] 朱富强,任振海,陈占领,等.采用脉冲磁致振荡技术提高矩形AM2锚链钢连铸坯的均匀性[J].上海金属, 2019, 41(3):96-100
[13] 王海洋,滕力宏,赵阳,等. PMO作用对连铸轴承钢凝固组织及碳化物的影响[J].连铸, 2018,43(6):32-35.
[14] 陈佳艺,朱雷敏,殷子豪,等.高速钢的生产和质量控制技术[J].上海金属, 2022, 44(2):8-14.
[15] 程勇,徐智帅,周湛,等. PMO凝固均质化技术在连铸GCr15轴承钢生产中的应用[J].上海金属,2016, 38(4):54-57.
[16] 曹天一,李莉娟,朱雷敏,等.脉冲磁致振荡(PMO)技术在ZTM-S2合金工具钢连铸坯生产中的应用[J].上海金属, 2021, 43(1):87-92.
[17] 刘海宁,陈杨珉,陈湘茹,等. PMO对高速钢枝晶组织及碳化物的影响[J].钢铁, 2024, 59(2):119-128.
[18] 仲红刚.连铸坯凝固过程热模拟研究[D].上海:上海大学, 2013.
[19] Zhong H G, Chen X R, Han Q Y, et al. A thermal simulation method for solidification process of steel slab in continuous casting[J]. Metallurgical and Materials Transactions B, 2016, 47(5):2963-2970.
[20] Zhong H G, Wang R J, Han Q Y, et al. Solidification structure and central segregation of 6Cr13Mo stainless steel under simulated continuous casting conditions[J]. Journal of Materials Research and Technology, 2022, 20:3408-3419.
[21] Bai L, Wang B, Zhong H G, et al. Experimental and numerical simulations of the solidification process in continuous casting of slab[J]. Metals, 2016, 6(3):53.
[22] 张炯明,王立峰,王新华,等.板坯连铸结晶器传热系数[J].金属学报, 2003, 39(12):1281-1284.
[23] 妮高.板坯连铸结晶器传热行为的理论研究[D].沈阳:东北大学, 2009.
[24] Brimacombe J K, Sorimachi K. Crack formation in the continuous casting of steel[J]. Metallurgical Transactions B, 1977, 8:489-505.
[25] Grosskurth N, Hater M, Klages R, et al. Experience of two years operation of a curved plant for continuous casting of plate, hot-strip and cold strip[J]. Stahl und Eisen, 1974, 94(15):673-681.
[26] BRiMAcoMBE J K. Design of continuous casting machines based on a heat-flow analysis:stateof-the-art review[J]. Canadian Metallurgical Quarterly, 1976, 15(2):163-175.
[27] 野崎努,松野淳一,村田賢治,等.連鋳スウブの表面欠陥防止のための2次冷却パターンについて[J].鉄と鋼, 1976, 62(12):1503-1512.
[28] Vanaparthy N M, Srinivasan M N. Modelling of solidification structure of continuous cast steel[J]. Modelling and Simulation in Materials Science and Engineering, 1998, 6(3):237.
[29] Zhong H G, Chen X R, Liu Y J, et al. Influences of superheat and cooling intensity on macrostructure and macrosegregation of duplex stainless steel studied by thermal simulation[J].Journal of Iron and Steel Research International, 2021, 28(9):1125-1132.
[30] Gong Y Y, Luo J, Jing J X, et al. Structure refinement of pure aluminum by pulse magnetooscillation[J]. Materials Science and Engineering A, 2008, 497(1/2):147-152.
[31] 黄希祜.钢铁冶金原理[M]. 4版.北京:冶金工业出版社, 2013.
[32] Ogi K, Myaharal H, Hong Z, et al. Solidification of high-speed steel type cast iron[J].Advanced Materials Research, 1997, 4/5:361-368.
[33] Ma Z T, Janke D. Characteristics of oxide precipitation and growth during solidification of deoxidized steel[J]. ISIJ International, 1998, 38(1):46-52.
[34] Choudhary S K, Ghosh A. Mathematical model for prediction of composition of inclusions formed during solidification of liquid steel[J]. ISIJ International, 2009, 49(12):1819-1827.
[35] 张伶玲,石昊,徐衡,等. PMO对连铸GCr15轴承钢枝晶生长的影响[J].上海金属, 2019, 41(5):73-80.
[36] 李涛,李莉娟,李开创,等. PMO对定向凝固GCr15轴承钢枝晶臂间距的影响[J].上海金属, 2023,45(5):62-69.
[37] 李婉琴,夏智斌,齐文涛,等.定向凝固法控制M₂高速钢中共晶碳化物形貌演变行为[J].上海金属,2020, 42(1):77-83.
[38] Zhou X F, Liu D, Zhu W L, et al. Morphology, microstructure and decomposition behavior of M₂C carbides in high speed steel[J]. Journal of Iron and Steel Research International, 2017,24(1):43-49.

The effect of PMO on the solidification microstructure and carbide precipitation of M2 high-speed steel continuous cast billets

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