A new method of non-alloyed hydrogen deoxidation is proposed, and the hydrogen deoxidation of GCr15 is studied using thermodynamic modelling. Deoxidation by blowing hydrogen is dominated by hydrogen molecular, and the degree of deoxidation depends on , which is independent of [H]. Carbon and hydrogen will compete for deoxidation during the blowing of hydrogen. The deoxidation mode depends on the relationship between the actual and the critical . The system pressure has a great influence on the carbon / hydrogen deoxidation equilibrium. Under vacuum conditions, carbon has a stronger deoxidation ability than hydrogen. Finally, a new process for hydrogen deoxidation was proposed. In the later stage of converter smelting, hydrogen was blown to reduce the excess oxygen → tapping, and hydrogen was blown to alternate deoxidation of carbon and hydrogen → sufficient carbon powder was added into the ladle → RH treatment, and hydrogen was stopped to blown, and carbon deoxidation occurred.
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References
1.
LuLLiWZhangJet al.Acta Metallurgica Sinica. 2009;45:73. (in Chinese). DOI:10.3321/j.issn:0412-1961.2009.01.012.
2.
HashimotoKFujimatsuTTsunekageNet al.Study of rolling contact fatigue of bearing steels in relation to various oxide inclusions. Mater Des. 2011;32:1605–1611. DOI:10.1016/j.matdes.2010.08.052.
3.
Costa E SilvaALVD.The effects of non-metallic inclusions on properties relevant to the performance of steel in structural and mechanical applications. J Mater Res Technol. 2019;8:2408–2422. DOI:10.1016/j.jmrt.2019.01.009.
MelanderAGustavssonA.An FEM study of driving forces of short cracks at inclusions in hard steels. Int J Fatigue. 1996;18:389–399. DOI:10.1016/0142-1123(96)00069-2.
6.
WalkerPFF.Improving the reliability of highly loaded rolling bearings: the effect of upstream processing on inclusions. Mater Sci Technol. 2014;30:385–410. DOI:10.1179/1743284713Y.0000000491.
7.
GuCLiuWLianJet al.In-depth analysis of the fatigue mechanism induced by inclusions for high-strength bearing steels. Int J Miner Metall Mater. 2021;28:826–834. DOI:10.1007/s12613-020-2223-9.
8.
GuCBaoYGanPet al.Effect of main inclusions on crack initiation in bearing steel in the very high cycle fatigue regime. Int J Miner Metall Mater. 2018;25:623–629. DOI:10.1007/s12613-018-1609-4.
9.
LiangYGuo-GuangC.Characteristics of Al2O3, MnS, and TiN inclusions in the remelting process of bearing steel. Int J Miner Metall Mater. 2017;24:869–875. DOI:10.1007/s12613-017-1472-8.
10.
MoghaddamSMSadeghiF.A review of microstructural alterations around nonmetallic inclusions in bearing steel during rolling contact fatigue. Tribol Trans. 2016;59:1142–1156. DOI:10.1080/10402004.2016.1141447.
11.
XiaoWBaoYGuCet al.Ultrahigh cycle fatigue fracture mechanism of high-quality bearing steel obtained through different deoxidation methods. Int J Miner Metall Mater. 2021;28:804–815. DOI:10.1007/s12613-021-2253-y.
12.
WuHLiQWeiCet al.Study on the behaviour of DS-class inclusions in advanced bearing steel. Metall Res Technol. 2019;116:223. DOI:10.1051/metal/2018096.
13.
ChengGZhangLRenY.Characterization and evolution of non-metallic inclusions in GCr15 bearing steels during cooling and solidification. Ironmak Steelmak. 2020;47:1217–1225. DOI:10.1080/03019233.2020.1719315.
14.
ZhangYChengGWangJet al.Steel Res Int. 2021: 2100445. DOI:10.1002/srin.202100445.
15.
ZhuMDengY.Acta Metaliurgica Sinica. 2022;58:28, (in chinese). DOI:10.11900/0412.1961.2021.00227.
16.
GuCWangMBaoYet al.Quantitative analysis of inclusion engineering on the fatigue property improvement of bearing steel. Metals (Basel). 2019;9:476. DOI:10.3390/met9040476.
17.
XiaoWWangMBaoY.The research of low-oxygen control and oxygen behavior during RH process in silicon-deoxidization bearing steel. Metals (Basel). 2019;9:812. DOI:10.3390/met9080812.
18.
ZhangHBaoLChenYet al.Efficiency improvements of the CO-H2 mixed gas utilization related to the molten copper slag reducing modification. Process Saf Environ Prot. 2021;146:292–299. DOI:10.1016/j.psep.2020.09.011.
19.
ZhangHLiBWeiYet al.Nonisothermal reduction kinetics in the Fe-Cu-O system using H2. JOM (1989). 2019;71:1813–1821. DOI:10.1007/s11837-019-03402-1.
20.
HuaiweiZXiaoyanSBoZet al.Reduction of molten copper slags with mixed CO-CH4-Ar Gas. Metall Mater Trans B, Process Metallurgy and Materials Processing Science. 2014;45:582–589. DOI:10.1007/s11663-013-9981-y.
21.
SuYWangLLuoLet al.Deoxidation of titanium alloy using hydrogen. Int J Hydrogen Energy. 2009;34:8958–8963. DOI:10.1016/j.ijhydene.2009.08.053.
22.
MakarovMAAleksandrovAADashevskiiVY.Behavior of carbon, oxygen, and sulfur during hydrogen blowing of liquid steel. Russ Metall Met. 2009;2009: 95–99. DOI:10.1134/S0036029509020013.
23.
MakarovMAAleksandrovAADashevskiiVY.Deep decarburization of steel. Russ Metall Met. 2006: 189–192. DOI:10.1134/S0036029506030013.
GuoXYuJZhangYet al.Deep deoxidization from liquid iron by hydrogen plasma arc melting. Int J Hydrogen Energy. 2018;43:12153–12157. DOI:10.1016/j.ijhydene.2018.04.035.
26.
ZhangYKongYGuoXet al.Mod Phys Lett B. 2021;35. DOI:10.1142/S021798492050030X.
27.
GuoXYuJZhangYet al.Mechanism of desulfurization from liquid iron by hydrogen plasma Arc melting. Metall Mater Trans B, Process Metallurgy and Materials Processing Science. 2018;49:2951–2955. DOI:10.1007/s11663-018-1345-1.
28.
XingW. Study on deoxidation by hydrogen and natural gas in molten steel. Wuhan University of Science and Technology. Doctor. (in chinese). 2009. DOI:10.7666/d.y1546305.
29.
MasahiroKTakahikoMToshihideTet al.Emulsion type rolling oil with high performance for friction pickup in high speed cold rolling. Tetsu-to-Hagane. 2004;90:128–133. DOI:10.2355/tetsutohagane1955.90.6_422.
30.
MakarovMAAleksandrovAADashevskiiVY.Deep decarburization of iron-based melts. Russ Metall Met. 2007;2007:91–97. DOI:10.1134/S0036029507020012.
31.
AverinVVPolyakovAYSamarinAM.Activity of Oxygen in Liquid Iron. NaukSSSR, Ser.Met.1955;3:90.
32.
ItoKSanoK.Kinetic studies on the deoxidation of molten iron by hydrogen gas. J Jpn Inst Metals Materials. 1965;29:626–630.
