Effect of heat treatment process on microstructure and properties of high nitrogen stainless steel produced by high pressure

doi:10.13251/j.issn.0254-6051.2024.11.030

Abstract

Abstract: Based on 316L stainless steel, a high nitrogen stainless steel with nitrogen content of 1.1% was designed and prepared by high pressure melting and high pressure solidification method. After solution treatment at 1050 ℃ for 10 h and aging at different temperatures (600, 800 and 1000 ℃), the distribution of nitrogen content in the high nitrogen steel ingot and the mechanical properties and corrosion resistance of the high nitrogen steel after solution-aging treatment were studied by means of nitrogen content distribution detection, microstructure observation, energy spectrum scanning, mechanical properties test, immersion corrosion and electrochemical corrosion. The results show that the macro nitrogen content of the tested high nitrogen steel is evenly distributed, but the enrichment of N and Cr elements exists in the micro level. The enrichment on the acicular martensite strip can improve the corrosion resistance of the material, and the precipitation of chromium nitride can improve the strength of the material but reduce its corrosion resistance. The mechanical properties of the steel aged at 800 ℃ for 2 h are the best, with tensile strength of 771 MPa and yield strength of 658 MPa. The corrosion resistance of the steel after solution treatment is the best, and the corrosion resistance of the steel aged at 800 ℃ for 2 h is better than that of other aging temperature treatments. Comprehensively considering the mechanical properties and corrosion resistance, The optimum heat treatment process of the tested high nitrogen steel is the solution treatment followed by aging treatment at 800 ℃ for 2 h.

Key words: high nitrogen stainless steel, aging treatment, microstructure, mechanical properties, corrosion resistance

CLC Number:

TG156

Liu Jimeng, Wang Shuhuan, Zhao Dingguo, Li Hao, Chen Qinggong. Effect of heat treatment process on microstructure and properties of high nitrogen stainless steel produced by high pressure[J]. Heat Treatment of Metals, 2024, 49(11): 195-202.

References

[1]Svyazhin A, Kaputkina L, Smarygina I, et al. Nitrogen steels and high-nitrogen steels: Industrial technologies and properties[J]. Steel Research International, 2022, 93(9): 2200160.
[2]Youssef H A. Machining of Stainless Steels and Super Alloys: Traditional and Nontraditional Techniques[M]. John Wiley & Sons, 2015.
[3]Vats V, Baskaran T, Arya S B. Tribo-corrosion study of nickel-free, high nitrogen and high manganese austenitic stainless steel[J]. Tribology International, 2018, 119: 659-666.
[4]Liu J, Zhao D, Zhang C, et al. Investigation of the role of nitrogen in Cr18Mn15Mo1.5N marine steel[J]. Steel Research International, 2022, 93(7): 2200018.
[5]Becerikli M, Jaurich H, Wallner C, et al. P2000-A high-nitrogen austenitic steel for application in bone surgery[J]. Plos One, 2019, 14(3): e0214384.
[6]Chen J K, Thyssen J P. Metal Allergy: From Dermatitis to Implant and Device Failure[M]// Baker M. European Standards Developed in Support of the European Union nickel Directive. Springer International Publishing, 2018: 23-29.
[7]Pitkálá J, Holappa L, Jokilaakso A. Nitrogen control in production of N-alloyed stainless steels in AOD converter: Application of Sieverts' law[J]. Metallurgical and Materials Transactions B, 2024, 55(1): 524-536.
[8]Dai Q X, Yuan Z Z, Luo X M, et al. Numerical simulation of Cr₂N age-precipitation in high nitrogen stainless steels[J]. Materials Science and Engineering A, 2004, 385(1-2): 445-448.
[9]吴浩, 徐桂芳, 严羽, 等. 新型高氮低镍奥氏体不锈钢的点蚀性能[J]. 金属热处理, 2015, 40(12): 11-16.
Wu Hao, Xu Guifang, Yan Yu, et al. Pitting corrosion resistance of a new high nitrogen and low nickel austenitic stainless steel[J]. Heat Treatment of Metals, 2015, 40(12): 11-16.
[10]安浩然, 王睿, 康燕, 等. 含氮马氏体不锈钢的腐蚀行为研究进展[J]. 钢铁研究学报, 2023, 35(6): 635-650.
An Haoran, Wang Rui, Kang Yan, et al. Research progress on corrosion behavior of nitrogen-alloyed martensitic stainless steel[J]. Journal of Iron and Steel Research, 2023, 35(6): 635-650.
[11]Mohammed R, Reddy G M, Rao K S. Welding of nickel free high nitrogen stainless steel: Microstructure and mechanical properties[J]. Defence technology, 2017, 13(2): 59-71.
[12]翁建寅, 董瀚, 李北, 等. N含量对高氮CrMnMo奥氏体不锈钢组织和性能的影响[J]. 金属热处理, 2020, 45(1): 160-163.
Weng Jianyin, Dong Han, Li Bei, et al. Effect of nitrogen content on microstructure and properties of high nitrogen CrMnMo austenitic stainless steel[J]. Heat Treatment of Metals, 2020, 45(1): 160-163.
[13]Wang Y, Feng H, Li H, et al. Study on the mechanism of excellent strength and toughness combination of a high nitrogen martensitic stainless steel treated by QCPT process[J]. Journal of Materials Research and Technology, 2023, 27: 804-812.
[14]Li M, Yin T, Wang Y, et al. Study of biocompatibility of medical grade high nitrogen nickel-free austenitic stainless steel in vitro[J]. Materials Science and Engineering C, 2014, 43: 641-648.
[15]Dai J, Feng H, Li H B, et al. Nitrogen significantly enhances corrosion resistance of 316L stainless steel in thiosulfate-chloride solution[J]. Corrosion Science, 2020, 174: 108792.
[16]周睿. 高氮不锈钢固溶与时效处理对显微组织及力学性能的影响[D]. 扬州: 扬州大学, 2020.
Zhou Rui. Effect ofsolution and aging treatment on microstructure and mechanical properties of high nitrogen stainless steel[D]. Yangzhou: Yangzhou University, 2020.
[17]Li S H, Li J, Shi C B, et al. Effect of nitrogen on solidification structure and microsegregation of electroslag remelted 7Cr13 steel[J]. Metallurgical and Materials Transactions B, 2024, 55(2): 1049-1068.
[18]Huang Z, Guo Z X, Liu L, et al. Structure and corrosion behavior of ultra-thick nitrided layer produced by plasma nitriding of austenitic stainless steel[J]. Surface and Coatings Technology, 2021, 405: 126689.
[19]Feng H, Jiang Z, Li H, et al. Influence of nitrogen on corrosion behaviour of high nitrogen martensitic stainless steels manufactured by pressurized metallurgy[J]. Corrosion Science, 2018, 144: 288-300.
[20]Cheng H, Luo H, Wang X, et al. Electrochemical corrosion and passive behavior of a new high-nitrogen austenitic stainless steel in chloride environment[J]. Materials Chemistry and Physics, 2022, 292: 126837.