Effect of boronizing temperature on properties of boronized layer on 45 steel

doi:10.13251/j.issn.0254-6051.2024.10.042

Abstract

Abstract: Effect of different boronizing temperatures (800, 850, 900 ℃) on thickness, hardness, fracture toughness, brittleness and corrosion resistance of boronized layer on 45 steel was studied. The hardness, crack morphology of indentation and elastic modulus of boronized layer were tested by Vickers hardness tester. The elastic modulus of boronized layer was measured by nanohardness tester, and the fracture toughness and brittleness of boronized layer were characterized quantitatively. The corrosion resistance of boronized layer was characterized by electrochemical workstation. The results show that after boriding at different temperatures, as the boronizing temperature increases, the thickness and hardness of the boronized layer increase, the fracture toughness decreases and the brittleness increases. After boronizing at 800 ℃, the self-corrosion potential of the boronized layer is the highest, the self-corrosion current density is the lowest and the corrosion resistance is the best. Comprehensively, the optimal boronizing process for 45 steel is boronizing at 800 ℃ for 4 h.

Key words: boronized layer, hardness, fracture toughness, brittleness, corrosion resistance

CLC Number:

TG178

Wang Lan, Xie Yuanna, Weng Chenhao, Song Jianfeng. Effect of boronizing temperature on properties of boronized layer on 45 steel[J]. Heat Treatment of Metals, 2024, 49(10): 258-263.

References

[1]Yan P X, Zhang X M, Xu J W, et al. High-temperature behavior of the boride layer of 45 carbon steel [J]. Materials Chemistry and Physics, 2001, 71(1): 107-110.
[2]Spence T W, Makhlouf M M. Characterization of the operative mechanism in potassium fluoborate activated pack boriding of steels [J]. Journal of Materials Processing Technology, 2005, 168(1): 127-136.
[3]Campos-Silva I, Hernández-Sánchez E, Rodríguez-Castro G, et al. Indentation size effect on the Fe₂B/substrate interface [J]. Surface and Coatings Technology, 2011, 206(7): 1816-1823.
[4]Campos-Silva I, Martínez-Trinidad J, Donu-Ruíz M A, et al. Interfacial indentation test of FeB/Fe₂B coatings [J]. Surface and Coatings Technology, 2011, 206(7): 1809-1815.
[5]Campos-Silva I, Ramirez G, Figueroa U, et al. Evaluation of boron mobility on the phases FeB, Fe₂B and diffusion zone in AISI 1045 and M2 steels [J]. Applied Surface Science, 2007, 253(7): 3469-3475.
[6]Uslu I, Comert H, Ipek M, et al. A comparison of borides formed on AISI 1040 and AISI P20 steels [J]. Materials and Design, 2007, 28(6): 1819-1826.
[7]袁庆龙, 曹晶晶. 45钢渗硼工艺对渗层组织与性能的影响[J]. 热加工工艺, 2010, 39(2): 134-136.
Yuan Qinglong, Cao Jingjing. Effect of boronization technology on microstructure and properties of boronizing layer on 45 steel [J]. Hot Working Technology, 2010, 39(2): 134-136.
[8]彭志辉, 杨志兵, 王少武, 等. 稀土对45钢渗硼层组织和性能的影响[J]. 金属热处理, 2004, 29(7): 31-34.
Peng Zhihui, Yang Zhibing, Wang Shaowu, et al. Effect of rare earth on structure and properties of boronizing layer [J]. Heat Treatment of Metals, 2004, 29(7): 31-34.
[9]王兰, 吴奕明, 卞国阳, 等. 稀土La₂O₃对45钢渗硼层性能的影响[J]. 表面技术, 2019, 48(2): 94-97.
Wang Lan, Wu Yiming, Bian Guoyang, et al. Effect of rare earth La₂O₃ on performance of 45 steel boronized layer [J]. Surface Technology, 2019, 48(2): 94-97.
[10]黄小明, 崔霞, 欧阳德来, 等. 稀土催渗下的45钢固体渗硼工艺研究[J]. 热加工工艺, 2013, 42(10): 194-197.
Huang Xiaoming, Cui Xia, Ouyang Delai, et al. Study on solid-boronizing process with rare earth elements catalysis for 45 steel [J]. Hot Working Technology, 2013, 42(10): 194-197.
[11]许伯藩, 张文峰, 张全萍, 等. 低温稀土硼共渗研究[J]. 武汉科技大学学报, 2000, 23(1): 18-21.
Xu Bofan, Zhang Wenfeng, Zhang Quanpin, et al. Study on the low temperature powder RE-boronizing [J]. Journal of Wuhan University of Science and Technology, 2000, 23(1): 18-21.
[12]闫忠琳, 叶宏. 碳氮共渗预处理对渗硼层组织性能的影响[J]. 热加工工艺, 2007, 36(20): 74-78.
Yan Zhonglin, Ye Hong. Effect of pre-carbonitriding on microstructure and properties of boronizing layer [J]. Hot Working Technology, 2007, 36(20): 74-78.
[13]赵建生, 陈枉秋, 谢长生, 等. 对渗硼层脆性几种测试方法的评价[J]. 金属热处理, 1990, 15(12): 32-35.
Zhao Jiansheng, Chen Wangqiu, Xie Changsheng, et al. The evaluation on methods for detecting brittleness of boronized layer [J]. Heat Treatment of Metals, 1990, 15(12): 32-35.
[14]李木森, 崔建军, 曹丽敏, 等. 渗硼层表面脆性测量方法探讨[J]. 理化检验-物理分册, 1995, 31(5): 33-34.
Li Musen, Cui Jianjun, Cao Limin, et al. Discussion on measuring method of surface brittleness of boride layer [J]. Physical Testing and Chemical Analysis (Part A: Physical Testing), 1995, 31(5): 33-34.
[15]李木森, 侯绪荣, 郭晓燕, 等. 用显微硬度压痕结合声发射研究硼化物层脆性[J]. 理化检验-物理分册, 1989, 25(1): 7-12.
Li Musen, Hou Xunrong, Guo Xiaoyan, et al. Study of brittleness of boride layers by microhardness indentation combined with acoustic emission [J]. Physical Testing and Chemical Analysis(Part A: Physical Testing), 1989, 25(1): 7-12.
[16]汤光平, 黄文荣, 周文凤. 渗硼层脆性及其控制措施[J]. 材料保护, 2003, 36(3): 57-59.
Tang Guangping, Huang Wenrong, Zhou Wenfeng. Brittlement and controlling measures of boriding layer [J]. Materials Protection, 2003, 36(3): 57-59.
[17]张菁, 董仕节, 黄伦. Cr12MoV钢渗硼层脆性与耐磨性研究[J]. 湖北汽车工业学院学报, 2005, 19(2): 16-19.
Zhang Jing, Dong Shijie, Huan Lun. Study of brittleness and wear resistance of boride layer to steel of Cr12MoV [J]. Journal of Hubei University of Automotive Technology, 2005, 19(2): 16-19.
[18]宋月鹏, 柳洪洁, 刘胜新, 等. 循环淬火渗硼锤片表层硼化物层的脆性研究[J]. 农业机械学报, 2003, 34(3): 148-149.
Song Yuepeng, Liu Hongjie, Liu Shengxin, et al. Research on the brittleness of surface layer boride of hammer sheet with cyclic quenching [J]. Journal of Agricultural Machinery, 2003, 34(3): 148-149.
[19]周芳, 刘凯, 罗宏, 等. 20钢包埋粉末渗硼层的组织及耐蚀性能研究[J]. 热加工工艺, 2017, 46(2): 164-168.
Zhou Fang, Liu Kai, Luo Hong, et al. Research on structure and corrosion resistance of pack boronized layer for 20 steel [J]. Hot Working Technology, 2017, 46(2): 164-168.
[20]李雪松, 吴化, 吴一. 20CrMo钢表面固体渗硼工艺及性能[J]. 金属热处理, 2005, 34(5): 57-60.
Li Xuesong, Wu Hua, Wu Yi. Pack boronizing process and properties of the boride layer on 20CrMo steel [J]. Heat Treatment of Metals, 2005, 34(5): 57-60.
[21]Campos-Silva I, Hernández-Sánchez E, Rodríguez-Castro G, et al. A study of indentation for mechanical characterization of the Fe₂B layer [J]. Surface and Coatings Technology, 2013, 232: 173-181.
[22]Sireli G K, Bora A S, Timur S. Evaluating the mechanical behavior of electrochemically borided low-carbon steel [J]. Surface and Coatings Technology, 2019, 381: 125177.
[23]Sen S, Ozbek I, Sen U, et al. Mechanical behavior of borides formed on borided cold work tool steel [J]. Surface and Coatings Technology, 2001, 135(2-3): 173-177.
[24]Kulka M, Makuch N, Piasecki A. Nanomechanical characterization and fracture toughness of FeB and Fe₂B iron borides produced by gas boriding of Armco iron [J]. Surface and Coatings Technology, 2017, 325: 515-532.
[25]Campos-Silva I, Flores-Jiménez M, Rodríguez-Castro G, et al. Improved fracture toughness of boride coating developed with a diffusion annealing process [J]. Surface and Coatings Technology, 2013, 237: 429-439.
[26]Makuch N. Nanomechanical properties and fracture toughness of hard ceramic layer produced by gas boriding of Inconel 600 alloy [J]. Transactions of Nonferrous Metals Society of China, 2020, 30(2): 428-448.
[27]Hernández-Sanchez E, Rodriguez-Castro G, Meneses-Amador A, et al. Effect of the anisotropic growth on the fracture toughness measurements obtained in the Fe₂B layer [J]. Surface and Coatings Technology, 2013, 237: 292-298.
[28]Makuch N, Kulka M. Fracture toughness of hard ceramic phases produced on Nimonic 80A-alloy by gas boriding [J]. Ceramics International, 2016, 42: 3275-3289.