Nitrogen titanium ion co-infiltration process for austenitic stainless steel

doi:10.13251/j.issn.0254-6051.2023.09.020

Abstract

Abstract: In order to investigate the effect of Ti ions on the ion nitriding of austenitic stainless steel, a comparative experiment was conducted on the ion nitriding results of the austenitic stainless steel with or without sponge titanium under the same nitriding conditions. The infiltration depth, surface hardness, microstructure, and distribution of main alloying elements in the infiltration layer of the 022Cr17Ni12Mo2 stainless steel specimens under two experimental conditions were studied by means of microhardness testers, optical microscopes (OM), scanning electron microscope (SEM) and energy dispersive spectroscope (EDS). The infiltration effect of titanium on the 022Cr17Ni12Mo2 stainless steel and the infiltration mechanism of titanium were investigated. The results show that the 022Cr17Ni12Mo2 stainless steel achieves 220-240 μm infiltration layer and 1087-1122 HV0.3 surface hardness after ion nitriding at 560 ℃ for 9 h with sponge titanium added. The infiltration layer increases by about 78% compared to that of the specimen of the same ion nitriding process without titanium, while the surface hardness has no obvious change, which greatly reduces the hardness gradient of the infiltration layer. It is concluded that the energizing mechanism of the 022Cr17Ni12Mo2 stainless steel specimen with titanium is as follows: Sponge titanium provides the super strong nitride forming element Ti ion in the furnace, which strengthens the deposition in the formation process of nitride, thus effectively improves the nitriding efficiency.

Key words: ion nitriding, titanium, catalyzing, austenitic stainless steel

CLC Number:

TG156.8

Wei Yongmei, Li Shuangxi, Wang Meitao, Zhao Yuxia, Gao Jie, Chen Lin. Nitrogen titanium ion co-infiltration process for austenitic stainless steel[J]. Heat Treatment of Metals, 2023, 48(9): 116-121.

References

[1]张文华. 不锈钢及其热处理[M]. 沈阳: 辽宁科学技术出版社, 2010.
[2]金维松. 含氮奥氏体不锈钢耐局部腐蚀性能的研究[D]. 昆明: 昆明理工大学, 2007.
[3]崔昆. 钢铁材料及有色金属材料[M]. 北京: 机械工业出版社, 1981: 215-228.
[4]赵昌盛. 模具材料及热处理手册[M]. 北京: 机械工业出版社, 2008: 457.
[5]王正国. 高氮奥氏体不锈钢显微组织及力学性能的研究[D]. 太原: 太原理工大学, 2011.
[6]胡明娟, 潘健生. 钢铁化学热处理原理[M]. 上海: 上海交通大学出版社, 1996.
[7]Wang Jun, Xiong Ji, Peng Qian, et al. Effects of DC plasma nitriding parameters on microstructure and properties of 304L stainless steel[J]. Materials Characterization, 2009, 60(3): 197-203.
[8]周孝重, 陈大凯. 等离子体热处理技术[M]. 北京: 机械工业出版社, 1990: 167-169.
[9]孙斐, 胡佳佳, 王树凯, 等. 气压对304 奥氏体不锈钢低温离子渗氮组织与性能影响及机理研究[J]. 材料热处理学报, 2014, 35(S2): 221-225.
Sun Fei, Hu Jiajia, Wang Shukai, et al. Effect of gas pressure in low temperature plasma nitriding on the microstructure and properties for 304 austenitic stainless steel[J]. Transactions of Materials and Heat Treatment, 2014, 35(S2): 221-225.
[10]卢世静, 孙斐, 缪小吉, 等. 离子渗氮和固溶复合处理制备深层含氮奥氏体不锈钢[J]. 表面技术, 2018, 47(10): 180-185.
Lu Shijing, Sun Fei, Miao Xiaoji, et al. Preparation for deep nitriding austenitic stainless steel by complex treatment of plasma nitriding and solid solution[J]. China Surface Engineering, 2018, 47(10): 180-185.
[11]冯晓庆, 蒋如意, 陈绪宏, 等. 气压对904L奥氏体不锈钢低温离子渗氮组织与耐蚀性能的影响[J]. 材料热处理学报, 2020, 41(3): 156-162.
Feng Xiaoqing, Jiang Ruyi, Chen Xuhong, et al. Effect of air pressure on microstructure and corrosion resistance of low temperature glow plasma nitriding layer of 904L austenitic stainless steel[J]. Transactions of Materials and Heat Treatment, 2020, 41(3): 156-162.
[12]夏立芳, 高彩桥. 钢的渗氮[M]. 北京: 机械工业出版社, 1989.
[13]Shen Lie, Wang Liang, Wang Yizuo, et al. Plasma nitriding of AISI 304 austenitic stainless steel with pre-shot peening[J]. Surface and Coatings Technology, 2010, 204(20): 3222-3227.
[14]王健, 马驰, 陈尔凡. 等离子体表面改性技术[J]. 辽宁化工, 2012, 41(5): 486-487, 525.
Wang Jian, Ma Chi, Chen Erfan. Plasma surface modification technology[J]. Liaoning Chemical Industry, 2012, 41(5): 486-487, 525.
[15]方梦莎, 张津, 连勇. 马氏体不锈钢不同渗氮方法对比试验[J]. 金属热处理, 2021, 46(10): 221-225.
Fang Mengsha, Zhang Jin, Lian Yong. Comparative test on different nitriding methods for martensitic stainless steel[J]. Heat Treatment of Metals, 2021, 46(10): 221-225.
[16]王艳芳, 殷挺峰, 李双喜. 脱碳层对38CrMoAl钢离子渗氮的影响[J]. 金属热处理, 2020, 45(10): 194-198.
Wang Yanfang, Yin Tingfeng, Li Shangxi. The influence of superficial decarburization layer to plasma nitriding for 38CrMoAl steel[J]. Heat Treatment of Metals, 2020, 45(10): 194-198.
[17]张志强, 荆洪阳, 徐连勇, 等. 铁素体/奥氏体双相不锈钢组织和耐局部腐蚀性能研究现状[J]. 材料保护, 2021, 54(1): 136-146.
Zhang Zhiqiang, Jing Hongyang, Xu Lianyong, et al. Research status on microstructure and localized corrosion resistance of ferrite/austenitic duplex stainless steels[J]. Materials Protection, 2021, 54(1): 136-146.
[18]Nutor R K, Cao Q P, Wang X D, et al. Tunability of the mechanical properties of (Fe₅₀Mn₂₇Ni₁₀Cr₁₃)_100-xMo_x high-entropy alloys via secondary phase control[J]. Journal of Materials Science and Technology, 2021, 73(14): 210-217.
[19]Yi Yan, Kang Ping, Zhang Ruihua, et al. Effect of heat treatment on microstructure and properties of VG10 and 3Cr13 dissimilar welded joints[J]. China Welding, 2021, 30(1): 21-29.
[20]夏立芳, 高彩桥. 钢的渗氮[M]. 北京: 机械工业出版社, 1989: 173-178.
[21]李春明, 朱伟恒, 焦东玲, 等. H13钢表面镀铬和气体渗氮复合处理的组织及性能[J]. 金属热处理, 2020, 45(5): 5-11.
Li Chunming, Zhu Weiheng, Jiao Dongling, et al. Microstructure and properties of H13 steel treated by chromium plating and gas nitriding[J]. Heat Treatment of Metals, 2020, 45(5): 5-11.
[22]李双喜, 顾敏, 孙启锋. 富铈稀土加入量对离子渗氮催渗效果的影响[J]. 金属热处理, 2019, 44(3): 93-96.
Li Shuangxi, Gu Min, Sun Qifeng. Energized function of Ce-rich rare earth content on ion nitriding[J]. Heat Treatment of Metals, 2019, 44(3): 93-96.