热力学计算在高氮奥氏体不锈钢研究中的应用

doi:10.3969/j.issn.1001-4381.2013.05.004

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Abstract The Thermo-Calc software was used to calculate the influence of pressure factor and elements including C, Cr, Mn and Ni on the solubility of nitrogen, the phase transformation during solidification in high nitrogen austenitic stainless steel with 22%(mass fraction) Cr. The microstructures and precipitates of new designed high austenitic stainless steel were studied also. The results show that Cr increases mainly the solubility of nitrogen in liquid steel. With about 0.1%C the minimum solubility of nitrogen during higher solidification temperature is enhanced remarkably. Mn increases not only the solubility of nitrogen in liquid steel but also the minimum solubility of nitrogen during earlier solidification. With proper Mn the phase area of austenite is extended and more stably, also the "ferrite trap" can be avoided. With a little nickel less than 2% the minimum solubility of nitrogen during higher solidification temperature is enhanced and the temperature extension of δ phase presence is reduced, also to make sure full austenite in steel at room temperature. Melting under pressure is efficiently to increase the solubility of nitrogen. The main precipitates of new high austenitic stainless steel are Cr₂₃C₆ and Cr₂N. To use thermodynamic calculation tools can be beneficial to research the melting, structure, heat treatment and hot working of high nitrogen austenitic stainless steels.

Key words： Thermo-Calc high nitrogen austenitic stainless steel nitrogen solubility alloy design

Received: 26 March 2012 Published: 20 May 2013

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TG142.71

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http://jme.biam.ac.cn/EN/10.3969/j.issn.1001-4381.2013.05.004 OR http://jme.biam.ac.cn/EN/Y2013/V0/I5/16

[1] HANNINEN H E. Application and performance of high nitrogen steels. AKDUT N, COOMAN B C DE, FOCT J. High Nitrogen Steels 2004 [C]. Germany: GRIPS media GmbH, 2004. 371-380.

[2] SIMMONS J W. Mechanical properties of isothermally aged high nitrogen stainless steel[J].Metall and Mater Trans A, 1995, 26(8): 2085-2101.

[3] GAVRILJUK V G, BERNS H. High Nitrogen Steels[M]. Germany: Springer-Verlag, 1999.133-136.

[4] SPEIDEL M O, ZHENG-CUI Ming-ling, High-nitrogen austenitic stainless steels[A]. SPEIDEL M O. High Nitrogen Steel 2003[C]. Swiss: vdf, Hochsch-Verl an der ETH Zürich, 2003. 63-73.

[5] NORMAND B. Nitrogen contribution in passivity of high nitrogen stainless steels[A]. AKDUT N, COOMAN B C DE, FOCT J. High Nitrogen Steels 2004 [C]. Germany: GRIPS media GmbH, 2004. 509-520.

[6] LANG Yu-ping, JIN Wei-song, RONG Fan, et al. Corrosion behavior of new metastable austenitic stainless steels[A]. DONG Han, SU Jie, SPEIDEL M O. Proceedings of International Conference on High Nitrogen Steels 2006[C]. China:Metallurgical Industry Press,2006. 214-220.

[7] GRABKE H J. The role of nitrogen in the corrosion of iron and steels[J]. ISIJ Inter, 1996,36(7): 777-786.

[8] NARKEVICH N A, IVANOVA E A, PANIN V E. Nitrogen-doped chromium-manganese cast iron used to obtain wear-resistant coatings by electron beam deposition[A]. DONG Han, SU Jie, SPEIDEL M O. Proceedings of International Conference on High Nitrogen Steels 2006[C]. China:Metallurgical Industry Press,2006. 462-468.

[9] GAVRILJUK V G. Atomic interactions and mechanisms of strengthening in nitrogen steels[A]. DONG Han, SU Jie, SPEIDEL M O. Proceedings of International Conference on High Nitrogen Steels 2006[C]. China:Metallurgical Industry Press,2006. 3-12.

[10] FEICHTINGER H K, STEIN G. Melting of high nitrogen steels[A]. HANNINEN H, HERTZMAN S, ROMU J. High Nitrogen Steels’98[C]. Switzerland: Trans Tech Publications Ltd, 1998. 261-270.

[11] KOWANDA C. Solubility of nitrogen in transition metals[A]. SPEIDEL M O. High Nitrogen Steel 2003[C]. Swiss: vdf, Hochsch-Verl an der ETH Zürich, 2003. 75-90.

[12] STEIN G, HUCKLENBROICH I. Manufacturing and applications of high nitrogen steels. SPEIDEL M O. High Nitrogen Steel 2003. Swiss: vdf, Hochsch-Verl an der ETH Zürich, 2003. 21-30.

[13] LI H X, WANG L J, REN Y P, et al. Thermodynamic calculation of the equilibrium phase-regions in the nickel-free 18Cr austenitic stainless steels with nitrogen[A]. DONG Han, SU Jie, SPEIDEL M O. Proceedings of International Conference on High Nitrogen Steels 2006[C]. China:Metallurgical Industry Press,2006. 241-245.

[14] HEON Y H, HYUKSANG K. Effects of Cr₂N on the pitting corrosion of high nitrogen stainless steels[J]. Electrochemica Acta, 2007, 52(5): 2172-2180.

[15] 陆世英,张廷凯,杨长强,等.不锈钢[M].北京:原子能出版社,1995. 215-217.