退火参数对45#钢微观组织和力学性能的影响

兰州理工大学学报 ›› 2024, Vol. 50 ›› Issue (6): 11-16.

退火参数对45^#钢微观组织和力学性能的影响

赵小龙^*1, 罗晓阳¹, 王正仲¹, 王生东¹, 贾智^2,3

1.酒钢集团宏兴钢铁股份有限公司碳钢薄板厂, 甘肃嘉峪关 735100;
2.兰州理工大学材料科学与工程学院, 甘肃兰州 730050;
3.兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室, 甘肃兰州 730050

收稿日期:2024-01-09 出版日期:2024-12-28 发布日期:2025-01-13
通讯作者: 赵小龙(1976-),男,甘肃西和人,博士生,正高级工程师.Email:zhaoxiaolong@jiugang.com
基金资助:
国家自然科学基金(52265049),甘肃省高等学校产业支撑计划(2022CYZC-26),甘肃省重点研发计划-工业类(23YFGA0054),甘肃省自然科学基金(23JRRA922)

Effect of annealing parameters on microstructure and mechanical properties of 45^# steel

ZHAO Xiao-long¹, LUO Xiao-yang¹, WANG Zheng-zhong¹, WANG Sheng-dong¹, JIA Zhi^2,3

1. Carbon Steel Sheet Plant, Jiu Steel Group Hongxing Iron & Steel Co. Ltd., Jiayuguan 735100, China;
2. School of Materials Science and Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China;
3. State Key Laboratory of Advanced Processing andRecycling of Nonferrous Metals, Lanzhou Univ. of Tech., Lanzhou 730050, China

Received:2024-01-09 Online:2024-12-28 Published:2025-01-13

摘要/Abstract

摘要： 研究了45^#钢在不同退火温度和升温速度下的微观结构特征和力学性能演变.对不同参数退火后的试样进行了取向、晶界、晶粒类型、几何必须位错以及析出相分析,结合拉伸力学性能测试,说明了不同试样的力学性能变化.结果表明:45^#钢的微观组织结构和力学性能在不同的退火参数下具有较大的区别.随着退火温度的升高,45^#钢中的取向梯度、小角度晶界、变形晶粒、几何必须位错和渗碳体含量减小.退火加热速度对微观组织的影响是复杂的,在低温下,升温速度越慢,再结晶程度越大;但是在高温下相变参与了退火过程中静态再结晶形核和长大.在0.08 ℃/s-690 ℃退火参数下45^#钢的拉伸力学强度和韧性最佳,拉伸断口表现为塑性断裂模式.

关键词: 45^#钢, 退火参数, 微观结构, 力学性能

Abstract: The microstructure characteristics and mechanical properties evolution of 45 steel under different annealing temperatures and heating rates were studied. The orientation, grain boundaries, grain types, geometrically necessary dislocations, and precipitates of samples with different annealing parameterswere analyzed. Combined with tensile mechanical properties testing, the mechanical properties of different samples were explained. The results indicated that the microstructure and mechanical properties of 45 steel have significant differences under different annealing parameters. As the annealing temperature increases, the orientation gradient, low-angle grain boundaries, deformed grains, geometrically necessary dislocations, and cementite content of 45 steel decrease. The effect of annealing heating rate on microstructure is complex. At low temperatures, the slower the heating rate, the greater the degree of recrystallization. However, at high temperatures, the phase transition participates in the static recrystallization nucleation and growth during the annealing process. Under the annealing parameters of 0.08 ℃/s-690 ℃, the tensile mechanical strength and toughness of 45 steel are the best, with the tensile fracture surface exhibiting a plastic fracture mode.

Key words: 45 steel, annealing parameters, microstructure, mechanical properties

中图分类号:

TG161

赵小龙, 罗晓阳, 王正仲, 王生东, 贾智. 退火参数对45^#钢微观组织和力学性能的影响[J]. 兰州理工大学学报, 2024, 50(6): 11-16.

ZHAO Xiao-long, LUO Xiao-yang, WANG Zheng-zhong, WANG Sheng-dong, JIA Zhi. Effect of annealing parameters on microstructure and mechanical properties of 45^# steel[J]. Journal of Lanzhou University of Technology, 2024, 50(6): 11-16.

参考文献

[1] 马正和,阿达依·谢尔亚孜旦,刘俊杰,等.45钢的激光淬火温度场与相变硬化区[J].金属热处理,2023,48(9):258-264.
[2] 李杰.在电热罩式退火炉生产冷轧薄板45钢的工艺研究[J].山西冶金,2007(1):10-11,19.
[3] YE D Y,WANG Z L.Change characteristics of static mechanical property parameters and dislocation structures of 45^# medium carbon structural steel during fatigue failure process[J].Materials Science and Engineering A,2001,297(1/2):54-61.
[4] 耿春丽.超声振动对45钢表层组织及摩擦性能影响的实验研究[D].青岛:中国石油大学(华东),2020.
[5] 张永军,王九花,李新鹏,等.石墨化钢压缩温变形行为的试验研究[J].哈尔滨工程大学学报,2021,42(3):433-438.
[6] 黄俊,罗海文.退火工艺对含Nb高强无取向硅钢组织及性能的影响[J].金属学报,2018,54(3):377-384.
[7] NASIRI Z,GHAEMIFAR S,NAGHIZADEH M,et al.Thermal mechanisms of grain refinement in steels:a review[J].Metals and Materials International,2021,27:2078-2094.
[8] KARMAKAR A,GHOSH M,CHAKRABARTI D.Cold-rolling and inter-critical annealing of low-carbon steel:Effect of initial microstructure and heating-rate[J].Materials Science and Engineering A,2013,564:389-399.
[9] REN Q Q,BAIK S I,AN D,et al.The effects of heat-treatment parameters on the mechanical properties and microstructures of a low-carbon dual-phase steel[J].Materials Science and Engineering A,2023,888:145801.
[10] PODDAR D,CHINTHA A R,JAYABALAN B,et al.Effect of low-temperature annealing on two-different severely cold-rolled steels[J].Materials Today Communications,2022,32:103907.
[11] LESCH C,ÁLVAREZ P,BLECK W,et al.Rapid transformation annealing:a novel method for grain refinement of cold-rolled low-carbon steels[J].Metallurgical and Materials Transactions A,2007,38:1882-1890.
[12] MASSARDIER V,NGANSOP A,FABREGUE D,et al.Identification of the parameters controlling the grain refinement of ultra-rapidly annealed low carbon Al-killed steels[J].Materials Science and Engineering A,2010,527:5654-5663.
[13] CHBIHI A,BARBIER D,GERMAIN L,et al.Interactions between ferrite recrystallization and austenite formation in high-strength steels[J].Journal of Materials Science,2014,49:3608-3621.
[14] 罗婵,任慧平,金自力,等.退火加热速度对CSP稀土冷轧钢板再结晶的影响[J].金属热处理,2015,40(4):125-128.
[15] KUBIN L P,MORTENSEN A.Geometrically necessary dislocations and strain-gradient plasticity:a few critical issues[J].Scripta Mater,2003,48:119-125.
[16] GAO H,HUANG Y,NIX W D,et al.Mechanism-based strain gradient plasticity—I.Theory[J].Journal of the Mechanics and Physics of Solids,1999,47:1239-1263.
[17] 刘剑锋.低碳低合金高强汽车钢组织性能调控[D].沈阳:东北大学,2018.
[18] 颜礼功,彭澎,李增,等.冷轧丝杆用45钢球化退火工艺研究[J].金属热处理,2000,4:34-35.
[19] 李朝阳,郭呈宇,康永林,等.船用高强韧钢二次淬火过程对屈强比的影响[J].哈尔滨工程大学学报,2022,43(10):1478-1482.