Effect of deoxidizer on non-metallic inclusions in M50NiL steel

Li Bing; Wu Zhiwei; Chen Wenxiong; Wang Xiaoqiang; Lang Dong; Zhang Jun; Mao Jian

doi:10.7513/j.issn.1004-7638.2023.03.027

Volume 44 Issue 3

Jun. 2023

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Li Bing, Wu Zhiwei, Chen Wenxiong, Wang Xiaoqiang, Lang Dong, Zhang Jun, Mao Jian. Effect of deoxidizer on non-metallic inclusions in M50NiL steel[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(3): 177-182. doi: 10.7513/j.issn.1004-7638.2023.03.027

Citation:

Li Bing, Wu Zhiwei, Chen Wenxiong, Wang Xiaoqiang, Lang Dong, Zhang Jun, Mao Jian. Effect of deoxidizer on non-metallic inclusions in M50NiL steel[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(3): 177-182. doi: 10.7513/j.issn.1004-7638.2023.03.027

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Effect of deoxidizer on non-metallic inclusions in M50NiL steel

doi: 10.7513/j.issn.1004-7638.2023.03.027

Li Bing^{1, 2
,},
Wu Zhiwei²,
Chen Wenxiong²,
Wang Xiaoqiang¹,
Lang Dong^{2, 3},
Zhang Jun²,
Mao Jian^{1
,
,}

1.
School of Materials Science and Engineering, Sichuan University, Chengdu 610065, Sichuan, China
2.
Chengdu Advanced Metal Materials Industry Technology Research Institute Co., Ltd., Chengdu 610303, Sichuan, China
3.
School of Mechanical Engineering, Sichuan University, Chengdu 610065, Sichuan, China

Received Date: 2022-08-26
Publish Date: 2023-06-30

Abstract

Abstract

Different deoxidizers were used for deoxidation in the vacuum smelting process of aero-engine bearing steel M50NiL, and the influence of different deoxidizer types on the morphology, type, size and number density of inclusions in the steel were studied. The results indicate that without adding deoxidizer, the inclusions in steel are mainly Al₂O₃ and Al-Mg spinel. After using Al-RE as deoxidizer, the main types of inclusions in steel are rare earth inclusions. When Al-RE-Si-Mn is used as deoxidizer, the type, size and distribution characteristics of inclusions in steel are basically similar to those of Al-RE deoxidizer. The addition of rare earth elements can significantly improve the type and morphology of inclusions in steel, where the main inclusion types are transformed from Al₂O₃-rich inclusions with angular and irregular shapes to nearly spherical rare earth inclusions, while reduce the maximum size of inclusions in steel and the number of large-sized Al₂O₃ inclusions. However, excessive addition of rare earth causes the agglomeration of rare earth inclusions in steel.
- M50NiL steel,
- deoxidizer,
- Al-RE,
- Al-RE-Si-Mn,
- non-metallic inclusions

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References(17)

References

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