Volume 42 Issue 4
Aug.  2021
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Chang Kaihua, Xu Tao, Zhu Chunli, Zhang Longfei, Su Yunlong, Shi Xiaofang, Chang Lizhong. Effect of ESR on oxygen content and inclusions in GCr15 bearing steel[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(4): 175-181. doi: 10.7513/j.issn.1004-7638.2021.04.029
Citation: Chang Kaihua, Xu Tao, Zhu Chunli, Zhang Longfei, Su Yunlong, Shi Xiaofang, Chang Lizhong. Effect of ESR on oxygen content and inclusions in GCr15 bearing steel[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(4): 175-181. doi: 10.7513/j.issn.1004-7638.2021.04.029

Effect of ESR on oxygen content and inclusions in GCr15 bearing steel

doi: 10.7513/j.issn.1004-7638.2021.04.029
  • Received Date: 2021-01-04
  • Publish Date: 2021-08-10
  • Electroslag remelting has a positive effect on improving the purity of steel, but it will increase oxygen for low oxygen content steel. In this paper, GCr15 bearing steel was used as consumable electrode to study the variation of oxygen content and inclusions in bearing steel with different slag systems under atmospheric environment and Ar protection. It is found out that the oxygen content in ESR ingot decreases with the decrease of the alumina content in the slag system when the CaF2-Al2O3-CaO ternary slag system is used for ESR of GCr15 bearing steel under the protection of argon, while the oxygen content in ESR ingot remelted with the slag system without Al2O3 is the lowest. The diameter of inclusions in ESR ingot remelted under the protection of argon is smaller than that of steel remelted with the same slag system in air. The increase of oxygen content is mainly due to the high temperature of slag pool during ESR, which leads to the poor stability of Al2O3 in slag.
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