Effects of alloy element and heat treatment on microstructure and properties of new-type slot edge steel

doi:10.13251/j.issn.0254-6051.2023.04.024

Abstract

Abstract: A new-type slot edge steel was designed by alloying with Cr, Mo, etc. The microstructure and properties of the new-type slot edge steel under different heat treatment processes were studied by means of scanning electron microscope, tensile and impact tester and Brinell hardness tester. The results show that the addition of Cr and Mo alloying elements improves the hardenability and tempering stability of the tested steel, refines the microstructure and promotes the precipitation of carbides. The strength, hardness, plasticity and toughness of the tested steel are significantly improved after proper heat treatment. The ZG-1 tested steel obtains tensile strength of 999-1002 MPa, yield strength of 931-933 MPa, elongation of 15.0%-14.0%, room temperature hardness of 296-298 HBW, impact absorbed energy of 61.0-63.0 J after water quenching at 900 ℃ or 920 ℃ and tempering at 500 ℃. Moreover, the combination of strength and toughness for the ZG-2 tested steel processed by water quenching at 920 ℃ and tempering at 500 ℃ or 520 ℃ is more excellent, with the tensile strength of 1039-1011 MPa, the yield strength of 981-947 MPa, the elongation after fracture of 15.0%-15.3%, the room temperature hardness of 305-298 HBW, and the impact absorbed energy of 64.5-67.5 J, which meet the properties requirements of the material for the middle slot of the scraper conveyor.

Key words: slot edge steel, alloy element, heat treatment, microstructure, mechanical properties

CLC Number:

Xu Haifeng, Li Hai, Li Fengmin, Fu Shengmin, Ming Keyu, Yu Yan. Effects of alloy element and heat treatment on microstructure and properties of new-type slot edge steel[J]. Heat Treatment of Metals, 2023, 48(4): 148-154.

References

[1]梁影, 王伟. 刮板输送机中部槽的研究现状及展望分析[J]. 世界有色金属, 2021(17): 160-161.
Liang Ying, Wang Wei. Research status andprospect analysis of middle trough of scraper conveyor[J]. World Nonferrous Metals, 2021(17): 160-161.
[2]高志鹏, 姚艳萍, 韩刚. 刮板输送机中部槽磨损研究分析[J]. 煤矿机械, 2021, 42(1): 48-50.
Gao Zhipeng, Yao Yanping, Han Gang. Study and analysis on wear of middle trough of scraper conveyor[J]. Coal Mine Machinery, 2021, 42(1): 48-50.
[3]樊兵. 刮板输送机中部槽槽帮断裂失效研究与优化[J]. 机械管理开发, 2021, 36(8): 95-96, 120.
Fan Bing. Optimization and fracture failure mechanism of the scraper conveyor[J]. Mechanical Management and Development, 2021, 36(8): 95-96, 120.
[4]朱真才, 李剑锋, 彭玉兴, 等. 刮板输送机中部槽的研究现状及展望[J]. 机械制造与自动化, 2020, 49(1): 1-3, 15.
Zhu Zhencai, Li Jianfeng, Peng Yuxin, et al. Research status and prospect of middle chute of scraper conveyor[J]. Machine Building and Automation, 2020, 49(1): 1-3, 15.
[5]刘厚明. 刮板输送机中部槽槽帮钢性能提升研发报告[J]. 内燃机与配件, 2020(8): 175-176.
[6]李小东. 刮板输送机中部槽受力及强度分析[J]. 机械工程与自动化, 2019(3): 89-91.
Li Xiaodong. Force and stress analysis of the middle trough of scraper conveyor[J]. Mechanical Engineering and Automation, 2019(3): 89-91.
[7]王志娜. 刮板输送机中部槽耐磨技术[J]. 煤矿机械, 2017, 38(4): 101-103.
Wang Zhina. Scraper converyor in central trough wear-resisting technology[J]. Coal Mine Machinery, 2017, 38(4): 101-103.
[8]吕仁杰, 赵会琴, 候利锋, 等. 槽帮材料及其制造工艺研究进展[J]. 铸造设备与工艺, 2015(4): 48-51.
Lü Renjie, Zhao Huiqin, Hou Lifeng, et al. Research progress on the material and manufacturing process for slot[J]. Foundry Equipment and Technology, 2015(4): 48-51.
[9]李凤敏, 李海. 采用稀土-B复合变质剂提高ZG30MnSi力学性能[J]. 中国铸造装备与技术, 2017(3): 15-17.
Li Fengmin, Li Hai. Using rare earth-B complex inoculant treat liquid steel to increase mechanical properties of ZG30MnSi[J]. China Foundry Machinery and Technology, 2017(3): 15-17.
[10]刘炳良, 聂辉文. 连续淬火回火工艺对30MnSi钢棒组织性能的影响[J]. 金属热处理, 2014, 39(6): 103-105.
Liu Bingliang, Nie Huiwen. Effects of continuous quenching and tempering on microstructure and properties of 30MnSi steel bar[J]. Heat Treatment of Metals, 2014, 39(6): 103-105.
[11]钟万里, 赵君, 王伟, 等. T91钢的回火工艺分析及其组织评定[J]. 金属热处理, 2012, 37(3): 94-98.
Zhong Wanli, Zhao Jun, Wang Wei, et al. Tempering process analysis and microstructure assessment of T91 steel[J]. Heat Treatment of Metals, 2012, 37(3): 94-98.
[12]吕超然, 史超, 蒋伟斌, 等. 回火温度对42CrMo钢组织和力学性能的影响[J]. 金属热处理, 2021, 46(1): 32-37.
Lü Chaoran, Shi Chao, Jiang Weibin, et al. Effect of tempering temperature on microstructure and mechanical properties of 42CrMo steel[J]. Heat Treatment of Metals, 2021, 46(1): 32-37.
[13]马青梅, 李菁菁, 张国文, 等. 退火及冷却方式对5182铝合金屈服平台的影响[J]. 材料热处理学报, 2019, 40(9): 21-25.
Ma Qingmei, Li Jingjing, Zhang Guowen, et al. Effect of annealing and cooling rate on yield plateau of 5182 alloy[J]. Transactions of Materials and Heat Treatment, 2019, 40(9): 21-25.
[14]周文强, 潘利波, 王立辉, 等. 低合金高强钢平整延伸率的控制与屈服平台的消除[J]. 武钢技术, 2016, 54(5): 49-53.
Zhou Wenqiang, Pan Libo, Wang Lihui, et al. Research on the reduction rate and yield platform elimination during temper rolling of HSLA[J]. Wuhan Iron and Steel Corporation Technology, 2016, 54(5): 49-53.
[15]卢斌, 胡君遂, 周新贵, 等. 回火对46CrNiMoVA钢组织与性能的影响[J]. 金属热处理, 1999(9): 17-19.
Lu Bin, Hu Junsui, Zhou Xingui, et al. Effect of tempering on microstructure and properties of 46CrNiMoVA steel[J]. Heat Treatment of Metals, 1999(9): 17-19.
[16]翟士斌, 余万华, 周斌斌, 等. Mo元素对热轧双相钢DP600相变规律影响[J]. 材料热处理学报, 2015, 36(11): 54-59.
Zhai Shibin, Yu Wanhua, Zhou Binbin, et al. Effect of Mo element on phase transformation behavior of hot rolled dual phase steel DP600[J]. Transactions of Materials and Heat Treatment, 2015, 36(11): 54-59.
[17]陈林恒, 邱保文, 赵晋斌, 等. Mo对超高强极地船舶用钢显微组织的影响[J]. 轧钢, 2020, 37(5): 1-5.
Chen Linheng, Qiu Baowen, Zhao Jinbin, et al. Effect of Mo on microstructure of ultra-high strength polar marine steel[J]. Steel Rolling, 2020, 37(5): 1-5.
[18]牛涛, 安成钢, 姜永文, 等. Mo和Cr对X80管线钢相变行为的影响[J]. 热加工工艺, 2018, 47(2): 114-117, 121.
Niu Tao, An Chenggang, Jiang Yongwen, et al. Effect of Mo and Cr on phase transformation behavior of X80 pipeline steel[J]. Hot working Techmology, 2018, 47(2): 114-117, 121.
[19]文宇龙, 张伟强, 康韶光, 等. 化学成分及热处理对槽帮铸钢力学性能的影响[J]. 金属热处理, 2015, 40(10): 32-35.
Wen Yulong, Zhang Weiqiang, Kang Shaoguang, et al. Effect of chemical composition and heat treatment on mechanical properties of ledge cast steel[J]. Heat Treatment of Metals, 2015, 40(10): 32-35.
[20]刘笑笑, 张铮, 张杰, 等. 回火温度对柔性齿轮钢40CrNiMo组织及力学性能的影响[J]. 金属热处理, 2021, 46(8): 99-104.
Liu Xiaoxiao, Zhang Zheng, Zhang Jie, et al. Effect of tempering temperature on microstructure and mechanical properties of 40CrNiMo steel for flexible gear[J]. Heat Treatment of Metals, 2021, 46(8): 99-104.