Control of segregation and hardenability band width by optimizing M-EMS parameters for gear steel
SUN Hai-bo1,LI Lie-jun2,WU Xue-xing3,YE De-xin3
(1. School of Materials Science and Energy Engineering, Foshan University, Foshan 528000, Guangdong, China 2. School?of?Mechanical?and Automotive Engineering, South?China?University?of Technology, Guangzhou 510640,Guangdong,China 3. Manufacturing Department,Guangdong Shaoguan Iron and Steel Co., Ltd., Shaoguan 512123, Guangdong, China)
Abstract:To improve the controllability of hardenability band width for gear steel products,the parameters dependence of in-mould electromagnetic stirring (M-EMS) on the component homogeneity and hardenability band width has been investigated based on the numerical simulation and plant trials. It was seen that superheat degree of liquid steel at the center of mould exit was reduced from 0.25 to -2.65 ℃,and the carbon segregation at 12 mm from strand surface decreased from 0.98 to 0.85 as the stirrer current increased from 100 to 600 A. The fluctuation range of carbon content on the cross section of roller gear steel product was firstly reduced and then increased with the increase of running current due to the integrated effects of superheat dissipation and concentration equilibrium in mold region with EMS,where the minimum fluctuation rate of 0.012% was presented under the stirrer current of 200 A. The magnitude of hardenability band could be decreased from 10HRC (max) to that less than 5HRC under the optimized M-EMS parameters of 200 A/2.5 Hz,as compared to normal case of 600 A/2.5 Hz,which was beneficial to effective control for hardenability band width.
收稿日期: 2017-12-25
出版日期: 2018-08-24
引用本文:
孙海波,李烈军,吴学兴,叶德新. 基于M-EMS工艺优化的齿轮钢偏析及淬透性带宽控制[J]. , 2018, 53(8): 55-61.
SUN Hai-bo,LI Lie-jun,WU Xue-xing,YE De-xin. Control of segregation and hardenability band width by optimizing M-EMS parameters for gear steel. Iron and Steel, 2018, 53(8): 55-61.
S. Mengaroni, M.D Bambach, F. Cianetti, et al. Strengthening Improvement on Gear Steels[J]. Steel Research International, 2016, 87(5): 608.
[1]
S. Mengaroni, M.D Bambach, F. Cianetti, et al. Strengthening Improvement on Gear Steels[J]. Steel Research International, 2016, 87(5): 608.
[2]
刘锟, 刘浏, 何平,等. 齿轮钢窄淬透性带控制技术[J]. 钢铁, 2015, 50(3):73. (LIU Kun, LIU Liu, HE Ping, et al. Investigation on Control Technology of Narrow Hardenability Band for Gear Steel[J]. Iron and Steel, 2015, 50(3):73)
[2]
刘锟, 刘浏, 何平,等. 齿轮钢窄淬透性带控制技术[J]. 钢铁, 2015, 50(3):73. (LIU Kun, LIU Liu, HE Ping, et al. Investigation on Control Technology of Narrow Hardenability Band for Gear Steel[J]. Iron and Steel, 2015, 50(3):73)
[3]
曹燕光, 徐乐, 时捷,等. SAE8620H齿轮钢的淬透性及其预测模型[J]. 金属热处理, 2016, 41(2): 188. (CAO Yan-guang, XU Le, SHI Jie, et al. Hardenability and its Prediction Model of SAE8620H Gear Steel[J]. Heat Treatment of Metals, 2016, 41(2): 188)
[3]
曹燕光, 徐乐, 时捷,等. SAE8620H齿轮钢的淬透性及其预测模型[J]. 金属热处理, 2016, 41(2): 188. (CAO Yan-guang, XU Le, SHI Jie, et al. Hardenability and its Prediction Model of SAE8620H Gear Steel[J]. Heat Treatment of Metals, 2016, 41(2): 188)
[4]
H. Sun, J. Zhang. Macrosegregation Improvement by Swirling Flow Nozzle for Bloom Continuous Castings[J]. Metallurgical & Materials Transactions B, 2014, 45(3):936-946.
[4]
H. Sun, J. Zhang. Macrosegregation Improvement by Swirling Flow Nozzle for Bloom Continuous Castings[J]. Metallurgical & Materials Transactions B, 2014, 45(3):936-946.
[5]
张静, 杨龙, 吴会平. 电磁搅拌作用下水口深度对液面波动的影响[J]. 钢铁, 2016, 51(3):32.(ZHANG Jing, YANG Long, WU Hui-ping. Influence of Nozzle Submerged Depth on Fluctuation of Liquid Level with Electromagnetic Stirring[J]. Iron and Steel, 2016, 51(3):32.)
[5]
张静, 杨龙, 吴会平. 电磁搅拌作用下水口深度对液面波动的影响[J]. 钢铁, 2016, 51(3):32.(ZHANG Jing, YANG Long, WU Hui-ping. Influence of Nozzle Submerged Depth on Fluctuation of Liquid Level with Electromagnetic Stirring[J]. Iron and Steel, 2016, 51(3):32.)
[6]
吴小林, 王福明, 黄晓星,等. 结晶器电磁搅拌对中碳钢成分偏析的影响[J]. 炼钢, 2005, 21(5):21.(WU Xiao-lin, WANG Fu-ming, HUANG Xiao-xing et al. Effect of Mould Electromagnetic Stirring on Segregation of Medium-carbon Steel[J]. Steelmaking, 2005, 21(5):21.)
[6]
吴小林, 王福明, 黄晓星,等. 结晶器电磁搅拌对中碳钢成分偏析的影响[J]. 炼钢, 2005, 21(5):21.(WU Xiao-lin, WANG Fu-ming, HUANG Xiao-xing et al. Effect of Mould Electromagnetic Stirring on Segregation of Medium-carbon Steel[J]. Steelmaking, 2005, 21(5):21.)
[7]
吴清明, 许伟阳, 颜慧成,等. 20CrMnTiH齿轮钢大方坯轧制圆钢宏观碳偏析控制[J]. 钢铁, 2012, 47(5):23.(WU Qing-ming, XU Wei-yang, YAN Hui-cheng, et al. Carbon Macro-segregation Control of Rolled Bar Produced from Cast Bloom of 20CrMnTiH Steel[J]. Iron and Steel, 2012, 47(5):23.)
[7]
吴清明, 许伟阳, 颜慧成,等. 20CrMnTiH齿轮钢大方坯轧制圆钢宏观碳偏析控制[J]. 钢铁, 2012, 47(5):23.(WU Qing-ming, XU Wei-yang, YAN Hui-cheng, et al. Carbon Macro-segregation Control of Rolled Bar Produced from Cast Bloom of 20CrMnTiH Steel[J]. Iron and Steel, 2012, 47(5):23.)
[8]
颜慧成. 结晶器电磁搅拌对齿轮钢端淬检验值的影响[J]. 金属材料与冶金工程, 2015(5):34.(YAN Hui-cheng. Effect of Electromagnetic Stirring on Hardenability of Gearing Steel[J]. Metal Materials and Metallurgy Engineering, 2015(5):34.)
[8]
颜慧成. 结晶器电磁搅拌对齿轮钢端淬检验值的影响[J]. 金属材料与冶金工程, 2015(5):34.(YAN Hui-cheng. Effect of Electromagnetic Stirring on Hardenability of Gearing Steel[J]. Metal Materials and Metallurgy Engineering, 2015(5):34.)
[9]
谢海平, 杨庆敏, 刘骅震,等. 窄淬透性齿轮钢20CrMnTiH5工艺研究[J]. 中国冶金, 2013, 23(7):24.(XIE Hai-ping, YANG Qing-min, LIU Hua-zhen, et al. Processing Research on Hardenability Characteristic of Gear Steel 20CrMnTiH5[J]. China Metallurgy, 2013, 23(7):24.)
[9]
谢海平, 杨庆敏, 刘骅震,等. 窄淬透性齿轮钢20CrMnTiH5工艺研究[J]. 中国冶金, 2013, 23(7):24.(XIE Hai-ping, YANG Qing-min, LIU Hua-zhen, et al. Processing Research on Hardenability Characteristic of Gear Steel 20CrMnTiH5[J]. China Metallurgy, 2013, 23(7):24.)
[10]
B. Ren, D. Chen, H. Wang, et al. Numerical analysis of coupled turbulent flow and macroscopic solidification in a round bloom continuous casting mold with electromagnetic stirring[J]. steel research international, 2015, 86(9): 1104.
[10]
B. Ren, D. Chen, H. Wang, et al. Numerical analysis of coupled turbulent flow and macroscopic solidification in a round bloom continuous casting mold with electromagnetic stirring[J]. steel research international, 2015, 86(9): 1104.
[11]
D. Jiang, M. Zhu. Solidification Structure and Macrosegregation of Billet Continuous Casting Process with Dual Electromagnetic Stirrings in Mold and Final Stage of Solidification: A Numerical Study[J]. Metallurgical & Materials Transactions B, 2016, 47(6): 3446.
[11]
D. Jiang, M. Zhu. Solidification Structure and Macrosegregation of Billet Continuous Casting Process with Dual Electromagnetic Stirrings in Mold and Final Stage of Solidification: A Numerical Study[J]. Metallurgical & Materials Transactions B, 2016, 47(6): 3446.