35CrMo钢高强度螺栓热处理工艺优化

doi:10.13251/j.issn.0254-6051.2024.05.038

摘要/Abstract

摘要： 采用单因素法对35CrMo钢的热处理工艺进行了研究,并以心部硬度达到半马氏体硬度作为淬透依据,1/2半径和心部硬度作为评价指标,采用正交试验法对3种直径φ30、φ32和φ36 mm试样进行热处理工艺优化,以确定满足螺栓强度等级10.9级的适宜的热处理工艺参数。结果表明,优化的热处理工艺参数为淬火加热温度860 ℃,保温时间50 min,水溶性淬火液淬火,回火温度480 ℃,保温时间80 min。采用优化工艺热处理后,3种直径样品的硬度、抗拉强度、屈服强度、断后伸长率和断面收缩率均满足10.9 级高强度螺栓力学性能要求。

关键词: 35CrMo钢, 热处理工艺, 硬度, 高强度螺栓

Abstract: Orthogonal test method was used to optimize the heat treatment process for three kinds of specimens with diameters of φ30, φ32 and φ36 mm in order to determine the suitable heat treatment process parameters to meet the bolt strength grade 10.9, where the heat treatment process of 35CrMo steel was investigated by using single-factor method, and that the hardness of the core reaching half martensite hardness was used as the basis for quenching, that the 1/2 radius and core hardness were used as the evaluation indexes. The results show that the optimal heat treatment parameters are the quenching temperature of 860 ℃, the holding time of 50 min, and the water-soluble quenching liquid for quenching, the tempering temperature of 480 ℃, and the tempering time of 80 min. After heat treatment with the optimized process, the hardness, tensile strength, yield strength, elongation and percentage reduction of area of all the specimens with three different diameters can meet the mechanical property requirements of 10.9 grade high strength bolts.

Key words: 35CrMo steel, heat treatment process, hardness, high strength bolt

中图分类号:

TG156.1

吕明奎, 夏添, 张保耀, 杨东辉, 陈敬. 35CrMo钢高强度螺栓热处理工艺优化[J]. 金属热处理, 2024, 49(5): 226-230.

Lü Mingkui, Xia Tian, Zhang Baoyao, Yang Donghui, Chen Jing. Heat treatment process optimization of 35CrMo steel high strength bolt[J]. Heat Treatment of Metals, 2024, 49(5): 226-230.

参考文献

[1]周燕, 雷宏刚, 李铁英. 摩擦型高强度螺栓抗剪连接研究进展及评述[J]. 建筑结构, 2019, 49(14): 62-68, 95.
Zhou Yan, Lei Honggang, Li Tieying.Research progress and review of friction style high-strength bolt shear connections[J]. Building Structure, 2019, 49(14): 62-68, 95.
[2]侯兆新, 龚超, 张艳霞, 等. 钢结构高强度螺栓连接技术新进展[J]. 钢结构, 2021, 36(1): 1-12.
Hou Zhaoxin, Gong Chao, Zhang Yanxia, et al. New development of high strength bolt connections in steel structures[J]. Steel Construction, 2021, 36(1): 1-12.
[3]黄志国, 曹永政, 李艳艳, 等. 10.9级紧固件用贝氏体型非调质冷镦钢的研究现状能[J]. 金属热处理, 2023, 48(8): 219-225.
Huang Zhiguo, Cao Yongzheng, Li Yanyan, et al. Research status of bainitic non-quenched and tempered cold heading steels for grade 10.9 fasteners [J]. Heat Treatment of Metals, 2023, 48(8): 219-225.
[4]史根豪, 朱思远, 王青峰, 等. 12.9级调质耐候螺栓钢的淬火温度优化[J]. 材料热处理学报, 2022, 43(4): 124-130.
Shi Genhao, Zhu Siyuan, Wang Qingfeng, et al.Quenching temperature optimization of grade 12.9 quenched and tempered weathering bolt steel [J]. Transactions of Materials and Heat Treatment, 2022, 43(4): 124-130.
[5]王娇娇, 刘宏春, 刘泳, 等. 一种宽回火时间窗口的10.9级螺栓钢组织和性能[J]. 金属热处理, 2023, 48(9): 233-237.
Wang Jiaojiao, Liu Hongchun, Liu Yong, et al. Microstructure and properties of a grade 10.9 bolt steel with wide tempering time window[J]. Heat Treatment of Metals, 2023, 48(9): 233-237.
[6]陶晓燕, 沈家华, 史志强. 我国钢桥高强度螺栓连接的发展历程及展望[J]. 铁道建筑, 2017, 57(9): 1-4.
Tao Xiaoyan, Shen Jiahua, Shi Zhiqiang. Development history and prospect of high strength bolt connection of steel bridge in China[J]. Railway Engineering, 2017, 57(9): 1-4.
[7]李昊, 惠卫军, 王娇娇, 等. Cu元素对42CrMoV高强度螺栓钢在模拟大气腐蚀环境下腐蚀行为的影响[J]. 材料保护, 2020, 53(11): 13-20.
Li Hao, Hui Weijun, Wang Jiaojiao, et al.Effect of Cu element on the corrosion behavior of 42CrMoV high strength bolt steel in simulated weathering environment[J]. Materials Protection, 2020, 53(11): 13-20.
[8]郝文魁, 刘智勇, 杜翠薇, 等. 35CrMo钢在酸性H₂S环境中的应力腐蚀行为与机理[J]. 机械工程学报, 2014, 50(4): 39-46.
Hao Wenkui, Liu Zhiyong, Du Cuiwei, et al.Stress corrosion cracking behavior of 35CrMo steel in acidic hydrogen sulfide solutions[J]. Journal of Mechanical Engineering, 2014, 50(4): 39-46.
[9]王瑛, 李广德, 李伟伦. 35CrMo钢螺母锻压工艺的智能控制研究[J]. 热加工工艺, 2022, 51(3): 101-103.
Wang Ying, Li Guangde, Li Weilun. Research on intelligent control of forging process of 35CrMo steel nuts [J]. Hot Working Technology,2022, 51(3): 101-103.
[10]朱红波, 孙立强, 王迪. 调质处理对35CrMo 钢组织和性能的影响[J]. 机械工程与自动化, 2016(2): 136-137.
Zhu Hongbo, Sun Liqiang, Wang Di. Effects of quenching and tempering on microstructure and properties of 35CrMo steel[J]. Mechanical Engineering & Automation, 2016(2): 136-137.
[11]杨栋杰. 35CrMo钢热处理工艺参数的研究[J]. 机械工程师, 2016(12): 132-133.
[12]林学强. 35CrMo等钢的贝氏体、马氏体的组织转变的研究[D]. 包头: 内蒙古科技大学, 2010.
Lin Xueqiang. Research on transformation mechanism of bainite and martensite in steel of 35CrMo ect. [D]. Baotou: Inner Mongolia University of Science and Technology, 2010.
[13]苏磊, 刘海红. 热处理工艺对35CrMo钢组织及性能的影响[J]. 金属热处理, 2016, 41(6): 73-78.
Su Lei, Liu Haihong. Influence of heat treatment on microstructure and mechanical properties of 35CrMo steel[J]. Heat Treatment of Metals, 2016, 41(6): 73-78.
[14]黄传明, 罗永华. 热处理工艺对35CrMo钢组织及性能的影响分析[J]. 中国金属通报, 2018(3): 189-190.
[15]魏明刚, 龚彬, 闵武, 等. 热变形对35CrMo钢淬火马氏体晶体学特征的影响[J]. 锻压技术, 2022, 47(8): 249-254.
Wei Minggang, Gong Bin, Min Wu, et al.Influence of hot deformation on crystallographic characteristics of quenched martensite for 35CrMo steel[J]. Forging and Stamping Technology, 2022, 47(8): 249-254.
[16]樊东黎, 徐跃明, 佟晓辉. 热处理工程师手册[M]. 北京: 机械工业出版社, 2011: 48.
[17]GB/T 3098.1—2010,紧固件机械性能螺栓、螺钉和螺柱[S].
GB/T 3098.1—2010, Mechanical properties of fasteners—Bolts, screws and studs[S].
[18]GB/T 3077—2015, 合金结构钢[S].
GB/T 3077—2015, Alloy structure steels[S].
[19]GB/T 228.1—2021, 金属材料拉伸试验第1部分: 室温试验方法[S].
GB/T 228.1—2021, Metallic materials—Tensile testing—Part 1: Method of test at room temperature[S].
[20]Ramadan N E, Khaled M I, Mervat M I, et al. Effect of quenching temperature on microstructure and mechanical properties of medium-carbon steel[J]. Metallography, Microstructure, and Analysis, 2021, 10(4): 485-495.
[21]程石, 胡锋, 王亚超, 等. 回火热处理对低碳高强度钢低温冲击韧性的影响[J]. 材料热处理学报, 2020, 41(12): 80-89.
Cheng Shi, Hu Feng, Wang Yachao, et al.Effect of tempering heat treatment on low-temperature impact toughness of low-carbon high-strength steel[J]. Transactions of Materials and Heat Treatment, 2020, 41(12): 80-89.
[22]樊东黎, 徐跃明, 佟晓辉. 热处理技术数据手册[M]. 2版. 北京: 机械工业出版社, 2006: 42.