In order to control the composition, morphology and size distribution of oxide inclusions in spring steel, the relationship between the content or activity of aluminum and calcium in molten steel and compositions of oxide inclusion precipitated at different temperatures was determined based on thermodynamic equilibrium for spring steel 60Si2MnA, and has been verified by practice. The size distribution of non-metallic inclusions electrolytically extracted from specimens of hot rolled spring steel was determined by image analyzer. The results show that there are a great deal of large inclusions in spring steel produced by the conventional process, and the quantity and the size of large inclusions in spring steel produced by new process are largely reduced. As a result, the fatigue properties of the spring steel produced by new process are highly improved, and the ratio of σ-1/σb is raised from 0.451 to 0.468.
参考文献
| [1] | Xue Zheng-liang;Li Zheng-bang;Zhang Jia wen et al.TheProperty and Morphology of Oxide Inclusion in Spring Steel Production by Different Deoxidization Processes[J].SpecialSteel(Chinese),2001,22(03):24-26. |
| [2] | Xue Zheng-liang;Li Zheng-bang;Zhang Jia wen et al.Deox-idization in Molten Steel and Oxide Inclusion Control[J].Spe-cial Steel(in Chinese),2001,22(06):21-23. |
| [3] | 薛正良,李正邦,张家雯,甘朝福,王玉.改善弹簧钢中氧化物夹杂形态的热力学条件[J].钢铁研究学报,2000(06):20-24. |
| [4] | Xue Zheng-liang;Li Zheng-bang;Zhang Jia wen et al.TheSize Distribution of Non-Metallic Inclusion in Spring Steel Pro-duced by Different Deoxidization Process[J].Iron and Steel,2001,36(12):20-23. |
| [5] | Malkiewicz T;Rudnik S.Deformation of Non-Metallic Inclu-sion during Rolling of Steel[J].Journal of the Iron and Steel Institute,1963:33-38. |
| [6] | Rudnik S .Discontinuities in Hot-Rolled Steel Caused by Non-Metallic Inclusions[J].JISI,1966,204:374-376. |
| [7] | Sigworth G K;Elliott J F .The Thermodynamics of Liquid Di-lute Iron Alloys[J].Metal Science Journal,1974,8:298-310. |
| [8] | CHO S W;Suito H .Assessment of Calcium-Oxygen Equilibri-um in Liquid Iron[J].ISIJ International,1994,34(03):265-269. |
| [9] | Howard M P;Bhattacharya D .Thermodynamics of Nozzle Blockage in Continuous Casting of Calcium-Containing Steels[J].Metallurgical and Materials Transactions,1984,15:547-562. |
| [10] | Gloria M F;Ramallugam S .Inclusion Precipitation Diagram for the Fe-O-Ca-Al System[J].Metallurgical and Materials Transactions,1980,11(01):125-130. |
| [11] | Chen Xiang-wu.Deoxidization during Steelmaking[M].Bei-jing,China:Metallurgical Industry Press,1991 |
| [12] | Maeda S;Soejima T.Shape Control of Inclusion in Wire Rodsfor High Tensile Cord by Refining with Synthetic Slag[A].USA:ISS,1989:379-385. |
| [13] | Wang L.;Lee H.G. .Prediction of the Optimum Bubble Size for Inclusion Removal from Molten Steel by Flotation[J].ISIJ International,1996(1):7-16. |
| [14] | Lifeng Zhang;S. Taniguchi .Fundamentals of Inclusion Removal from Liquid Steel by Attachment to Rising Bubbles[J].Iron & Steelmaker,2001(9):55-78. |
| [15] | Murakami Y;Eudo M .Effects of Hardness and Crack Geom-etries on ΔKth of Small Cracks[J].Journal of Materials Science Society of Japan,1986,35:911-917. |
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