电渣重熔结晶器旋转对M2高速钢凝固过程的影响

doi:10.12034/j.issn.1009-606X.218272

摘要/Abstract

摘要： 研究了自行设计的结晶器可旋转的电渣炉的旋转速率对M2高速钢凝固过程的影响，采用双极串联?电渣重熔方法，对不同结晶器转速下所制M2高速钢的二次枝晶、冷却速率、渗透率和渣皮厚度进行统计、计算和分析。结果表明，随结晶器转速增大，M2高速钢中心和边部的枝晶被打碎，结晶器转速越快，枝晶破碎越明显。结晶器转速由0增至19 r/min，M2高速钢在中心和边部的平均二次枝晶间距分别减小19.47%和25.23%，平均冷却速率分别增大97.01%和148.06%，平均渗透率分别降低34.94%和44.04%。结晶器旋转能将渣皮厚度降低40.41%，渣壳厚度的方差由0.163降至0.003，渣皮变得均匀，增大了金属熔池向外传热，使金属熔池变浅；另一方面，M2高速钢枝晶破碎、平均二次枝晶间距减小和渗透率降低使M2高速钢在凝固过程中的偏析得到控制，因而结晶器旋转可提高M2高速钢的凝固质量。

关键词: 高速钢, 电渣重熔, 结晶器旋转, 凝固, 渣皮

Abstract: A new electroslag furnace with mould rotation was designed, and the effect of mould rotation speed on M2 high speed steel solidification process was studied. A double-electrode series-electroslag remelting method was used in the experiment, the secondary dendrite, cooling rate, permeability and slag thickness of M2 high speed steel prepared at different mould rotational speeds were analyzed, calculated and counted. The results showed that the dendrites of M2 high-speed steel at the center and the edge were broken with the increase of the mould rotational speed, and the faster speed of mould rotate, the dendrite was broken more obviously. When the mould rational speed was increased from 0 to 19 r/min, at center and edge of M2 high speed steel, the average secondary dendrite spacing decreased by 19.47% and 25.23%, and the permeability decreased by 34.94% and 44.04%, the average cooling rate increased by 97.01% and 148.06%, respectively. The mould rotation reduced the thickness of the slag skin by 40.41%, and the variance of the thickness of the slag skin was reduced from 0.163 to 0.003, and the slag skin became uniform. On the one hand, the slag skin became thinner and uniform, which increased the heat transfer of the molten metal pool to the mould, so that the molten metal pool became shallow, on the other hand, the dendrites were broken, the reduction of the average secondary dendrite spacing and the decrease of permeability of M2 high speed steel can control the segregation of M2 high-speed steel during solidification. The solidification quality of the M2 high speed steel was improved by mould rotation.

Key words: High speed steel, electroslag remelting, Mould rotation, slag skull

陈佳顺常凯华郑福舟张章常立忠. 电渣重熔结晶器旋转对M2高速钢凝固过程的影响[J]. 过程工程学报, 2019, 19(3): 581-588.

Jiashun CHEN Kaihua CHANG Fuzhou ZHENG Zhang ZHANG Lizhong CHANG?. Effect of electroslag remelting mould rotation on solidification process of M2 high speed steel[J]. Chin. J. Process Eng., 2019, 19(3): 581-588.

参考文献

[1] 邓玉昆, 陈景榕, 王世章. 高速工具钢[M]. 北京：冶金工业出版社，2002
Deng Yu-kun，Chen Jing-rong，Wang Shi-zhang. High Speed Tool Steel[M]. Beijing：Metallurgical Industry Press，2002.
[2] 周雪峰, 方峰, 蒋建清. 冷却速度对高速钢M2C共晶碳化物的影响[J]. 铸造, 2008 , 57 (7) : 658-660.
ZHOU Xue-feng, FANG Feng, J IANG Jian-qing. Effect of Cooling Rates on M2C Eutectic Carbides in High Speed Steel[J]. Foundry, 2008 , 57 (7) : 658-660.
[3] 迟宏宵 ,马党参, 吴立志等. M2高速钢中M2C共晶碳化物的相变行为[J].金属热处理, 2010, 35 (5): 19-22.
CHI Hong-xiao, MA Dang-shen, WU Li-zhi etal. Phase Ttransition Characteristics of M2C Eutectic Carbide in M2 High Speed Steel[J]. Heat Treatment of Metals, 2010, 35 (5): 19-22.
[4] 王启明,成国光,黄宇. M2高速钢大尺寸碳化物的形貌特征及析出机理[J]. 钢铁 , 2018 ,53(1): 65-71.
WANG Qi-ming, CHENG Guo-guang, HUANG Yu. Morphology and Precipitation Mechanism of Large Carbides in M2 |High Speed Steel[J]. Iron and Steel, 2018 ,53(1): 65-71.
[5] 周雪峰, 方峰, 涂益友. Al对M2高速钢凝固组织的影响[J]. 金属学报, 2014, 50 (7): 769-776.
ZHOU Xue-feng , FANG Feng , TU Yi-you etal. Effect of Aluminum on the Solidification Microstructure of M2 High Speed Steel[J].Acta Metallurgica sinica, 2014, 50 (7): 769-776.
[6] 李正邦. 电渣冶金的原理与实践 [M]. 北京: 冶金工业出版社，2010.
Li Zheng-bang. Principle and practice of electroslag metallurgy[M].Bei Jing, Metallurgical Industry Press, 2010.
[7] 赵志刚, 颜慧成, 仇圣桃等. 冷却速率对M2高速工具钢铸锭凝固组织的影响[J]. 特殊钢, 2014 , 35 (3) :45-48
Zhao Zhi-gang, Yan Hui-cheng, Qiu Sheng-tao, etal. Effect of Cooling Rate on Solidification Structure of M2 High Speed Tool Steel Ingot[J]. Special Steel, 2014, 35 (3) :45-48.
[8] 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
Chu Wei, Xie Chen, Wu Xiao-chun. Research on Controlling Eutectic Carbides in M2 High Speed Steel of ESR Process[J]. Shanghai Metals, 2013, 35 (5): 23-26.
[9] L.L.Wang, J. Li, B. Ning, etal. Effects of Magnesium on Wear Resistance of H13 Steel[J]. Materials Transactions, 2014, 55 (7) :1104-1108
[10]贾成厂, 张万里, 胡彬涛等. 稀土元素对高速钢组织和性能的影响[J]. 粉末冶金技术, 2017, 35 (6): 416-421
Jia Cheng-chang, ZHang Wan-li, Hu Bin-tao etal. Influence of Rare Earth Elements on Microstructure and Mechanical Properties of High Speed Steel[J].Powder Metallurgy Technology, 2017, 35 (6): 416-421
[11] 李彦军, 姜启川, 赵宇光等.铈对M2高速钢凝固组织的作用[J].中国稀土学报, 1999 , 17 (2) :149-152
Li Yan-jun, Jiang Qi-chuan, Zhao Yuguang,etal. Influence of Cerium on Solidification Structure of M2 High Speed Steel[J]. Journal of the Chines Rare Earth Socity, 1999, 17 (2) :149-152
[12] 常立忠, 施晓芳, 从俊强等. 结晶器旋转对电渣重熔钢锭中元素分布的影响[J].过程工程学报, 2014, 14 (2):266-272
Chang Li-zhong, Shi Xiao-fang, Cong Jun-qiang etal. Effect of Mould Rotation on Distribution of Elements in Steel Ingot in Electroslag Remelting[J].The Chinese Journal of Process Engineering, 2014, 14 (2):266-272
[13] Shi Xiao-fang, Chang Li-zhong, and Jian-jun Wang. Effect of mold rotation on the bifilar electroslag remelting process，International Journal of Minerals, Metallurgy and Materials, 2015, 22(10): 1033-1042.
[14] Chang Lizhong, Shi Xiaofang, Wang Runxi et al. Effect of relative motion between the consumable electrodes and mould on the inclusion changes during electroslag remelting process,China,foundry, 2014,11(5):452-456.
[15] 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.
[16] M Boccalini, H Goldenstein. Solidification of High Speed Steels[J]. Metallurgical Reviews, 2001, 46 (2): 92-115
[17] 武拥军, 姜周华, 梁连科, 等. 钢的液相线温度的计算[J]. 钢铁研究学报, 2002, 14(6): 6-9．
WU Yong-jun, JIANG Zhou-hua, LIANG Lian-ke etal. Calculation on Liquidus Temperature of Steel[J]. Journal of Iron and Steel Research, 2002, 14(6): 6-9
[18] G. Steven, A. E. Nehrenberg, and T. V. Philip. A study of the metallurgical properties that are necessary for satisfactory bearing performance and the development of improved bearing alloys for service up to 1000F [J]. Trans. ASM: 1964, 57, pp. 925-948．
[19] 赵志刚, 仇圣桃, 朱荣. 水冷铜模与砂模铸造M2钢显微组织对比[J]. 工程科学学报, 2016, 38 (6) :787-794.
ZHAO Zhi-gang, QIU Sheng-tao, Zhu Rong. Comparison between the microstructures of M2 steel cast by the water-cooled copper mould and the sand mould[J]. Chinese Journal of Engineering, 2016, 38 (6) :787-794.
[20] Carman P. C. Flow of Gases through Porous Media. London: Butterworths Scientific Publications, 1956.
[21] I.V. Chumanov. Technology for Electroslag Remelting with Rotation of the Consumable Electrode[J]. Metallurgist, 2001, 45 (3-4): 125-128.
[22] Ahmad N, Combeau H, Desbiolles J L, et al. Numerical simulation of macrosegregation: a comparison between finite volume method and finite element method predictions and a confrontation with experiments(J). Metall Mater Trans B, 1998, 29(1): 617–630.
[23] M.C. Flemings. Solidification processing[J]. McGraw-Hill, 1974, 5 (10): 2121-2134.