Research on non-metallic inclusions in high-speed wheel steel

Li Xiangyang; Wu Wangpeng; Chen Yan; Zhao Hai; Shen Chang; He Yizhu

doi:10.7513/j.issn.1004-7638.2021.03.030

Volume 42 Issue 3

Jun. 2021

Turn off MathJax

Article Contents

Article Navigation > IRON STEEL VANADIUM TITANIUM > 2021 > 42(3): 199-204

Li Xiangyang, Wu Wangpeng, Chen Yan, Zhao Hai, Shen Chang, He Yizhu. Research on non-metallic inclusions in high-speed wheel steel[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(3): 199-204. doi: 10.7513/j.issn.1004-7638.2021.03.030

Citation:

Li Xiangyang, Wu Wangpeng, Chen Yan, Zhao Hai, Shen Chang, He Yizhu. Research on non-metallic inclusions in high-speed wheel steel[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(3): 199-204. doi: 10.7513/j.issn.1004-7638.2021.03.030

Citation:

PDF( 1197 KB)

Research on non-metallic inclusions in high-speed wheel steel

doi: 10.7513/j.issn.1004-7638.2021.03.030

1.
School of Materials Science and Engineering, Anhui University of Technology, Ma^，anshan 243032, Anhui, China
2.
Ma^，anshan Iron and Steel Co., Ltd. ，Ma^，anshan 243032, Anhui, China

Received Date: 2020-09-23
Publish Date: 2021-06-10

Abstract

Abstract

In order to reduce the adverse effects of brittle Al₂O₃ inclusions on the fatigue properties of high-speed wheel steels, plastic inclusions are usually used to wrap the brittle inclusions. In order to evaluate the wrapping state of wrapped inclusions in high-speed wheel steel, scanning electron microscope and ASPEX automatic scanning electron microscope are used to analyze and study the wrapped non-metallic inclusions in core-shell structure of high-speed wheel steel, including core-shell structure wrapped non-metallic inclusions. The morphology and composition of metal inclusions, including the core and shell, the composition of the inclusions and the matrix interface, were analyzed. And the size of the core and shell had been statistically measured. It is found out that core-shell structured non-metallic inclusions are generally elliptical with a length of 1～10 μm. The main component of the coating shell is plastic MnS inclusions. The thickness of the coating is typical around 0～2.26 μm. The wrapped core is dominated by brittle inclusions Al₂O₃, and the size of the core is small, generally 0.31～1.43 μm. There is a composition gradient from the core of the inclusion to the outer shell. It is inferred that the outer layer of the inclusion is chemically bonded between MnS and Al₂O₃. The calculation results using JMatPro thermodynamics software show that the increase of S and Mn content can increase the precipitation temperature of MnS, help to form core-shell non-metallic inclusions of MnS wrapped Al₂O₃, thereby improve the fatigue performance of high-speed wheel steel.
- high-speed wheel steel,
- wrapped non-metallic inclusions,
- composition analysis,
- size statistics,
- thermodynamic calculation

FullText(HTML)

References(7)

References

[1]	Ma Yue, Pan Tao, Jiang Bo, et al. The effect of S content on the fracture toughness of high-speed wheel steel[J]. Acta Metallurgica Sinica, 2011,47(8):978−983. (马跃, 潘涛, 江波, 等. S含量对高速车轮钢断裂韧性影响的研究[J]. 金属学报, 2011,47(8):978−983.
[2]	Lyne C M, Kasak A. Effect of sulfur on the fatigue behavior of bearing steel[J]. Trans ASM, 1968, 61(1): 10.
[3]	Zhang Jingrui, Hu Qingli, Zhao Naisheng , et al. Preparation process of samples for ASPEX automatic inclusion analyzer[J]. Physical Testing and Chemical Analysis Part B: Physics, 2018,54(10):712−715. (张敬蕊, 胡庆利, 赵乃胜 ,等. ASPEX全自动夹杂物分析仪试样的制备工艺[J]. 理化检验(物理分册), 2018,54(10):712−715.
[4]	Wang Xinhua, Li Xiugang, Li Qiang, et al. Control of non-metallic inclusions in series CaO-Al₂O₃ system in X80 pipeline steel plate[J]. Acta Metallurgica Sinica, 2013,49(5):553−561. (王新华, 李秀刚, 李强, 等. X80管线钢板中条串状CaO-Al₂O₃系非金属夹杂物的控制[J]. 金属学报, 2013,49(5):553−561. doi: 10.3724/SP.J.1037.2012.00505
[5]	Tian Chao, Liu Jianhui, Dong Han. Comparative study on the characteristics of inclusions in imported and domestic bearing steel[J]. Hot Working Technology, 2017,46(24):58−62. (田超, 刘剑辉, 董瀚. 进口与国产轴承钢夹杂物特征的对比研究[J]. 热加工工艺, 2017,46(24):58−62.
[6]	Lei Shaolong, Jiang Min, Yang Die , et al. Effects of oxides in Al deoxidized steel on MnS precipitation[J]. Journal of University of Science and Technology Beijing, 2013,35(11):1443−1449. (雷少龙, 姜敏, 杨叠, 等. Al脱氧钢中氧化物对MnS析出的影响[J]. 北京科技大学学报, 2013,35(11):1443−1449.
[7]	Yu Yinhong, Pan Tao, Yin Jiancheng, et al. The effect of S content on the properties and inclusions of high-speed wheel steel[J]. Iron and Steel, 2013,48(10):57−62. (余音宏, 潘涛, 尹建成, 等. S含量对高速车轮钢性能和夹杂物的影响[J]. 钢铁, 2013,48(10):57−62.