Microscopic mechanism of induction hardening of 34CrNiMo6 steel  crankshaft journal

doi:10.13251/j.issn.0254-6051.2024.01.039

Abstract

Abstract: Hardness value of 34CrNiMo6 steel crankshaft journal after induction hardening with intermediate frequency and tempering at 300 ℃ was tested under quenching voltages of 460 V, 480 V and 500 V through microhardness tester. The microstructure evolution of the journal under different quenching voltages, and the influence mechanism of microstructure evolution on the surface hardness of the crankshaft steel was observed and studied by means of optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive spectrometer (EBSD) and X-ray diffraction analyzer (XRD). The results show that after induction hardening at 460 V, 480 V and 500 V, the surface hardness of each specimen is significantly improved, and the hardness of the subsurface layer reaches the maximum. This is mainly due to the different microstructure, phase contents and dislocation densities in different regions of each specimen after surface induction hardening at different voltages. According to the different structures and hardness distribution, the journal can be divided into hardened layer, transition layer and core from the surface to the inside. The depth and hardness of the hardened layer are positively correlated with the quenching voltage.

Key words: 34CrNiMo6 steel crankshaft, induction hardening, microstructure, hardness

CLC Number:

TG156.33

Wang Yingzhi, Xie Bo, Ji Chao, Wang Hongxia, Zheng Liuwei, Liang Wei. Microscopic mechanism of induction hardening of 34CrNiMo6 steel crankshaft journal[J]. Heat Treatment of Metals, 2024, 49(1): 242-248.

References

[1]方琴, 陈庚, 吴永波, 等. 热处理对34CrNiMo6钢组织和力学性能的影响[J]. 铸造技术, 2017, 38(8): 1866-1867.
Fang Qing, Chen Geng, Wu Yongbo, et al. Influence of heat treatment on microstructure and mechanical properties of 34CrNiMo6 steel[J]. Foundry Technology, 2017, 38(8): 1866-1867.
[2]Shang Shi, Huang Chunping, Liu Fenggang, et al. Effect of heat treatment on microstructure and mechanical properties of 34CrNiMo6 steel by laser solid forming[J]. Journal of Manufacturing Processes, 2022, 78: 308-318.
[3]蔡红, 叶俭, 王丽莲, 等. 高铁车轴用 34CrNiMo6 钢的热处理工艺[J]. 金属热处理, 2012, 37(4): 95-98.
Cai Hong, Ye Jian, Wang Liliang, et al. Heat treatment process of 34CrNiMo6 steel for high-speed railway axle[J]. Heat Treatment of Metals, 2012, 37 (4): 95-98
[4]谢帅. 高铁车轴用34CrNiMo6钢的热处理工艺研究[J]. 中国设备工程, 2020(22): 14-15.
Xie Shuai. Study on heat treatment process of 34CrNiMo6 steel for high-speed railway axle[J]. China Plant Engineering, 2020 (22): 14-15.
[5]Aleks Vrcˇek, Tobias Hultqvist, Tomas Johannesson, et al. Micro-pitting and wear characterization for different rolling bearing steels: Effect of hardness and heat treatments[J]. Wear, 2020, 458: 203404.
[6]魏世同, 吴长江, 郑雷刚, 等. 表面淬火工艺对大型轴承套圈用42CrMo钢淬硬层的影响[J]. 金属热处理, 2022, 47(10): 218-223.
Wei Shitong, Wu Changjiang, Zheng Leigang, et al. Effect of surface quenching process on hardened layer of 42CrMo steel for large bearing ring[J]. Heat Treatment of Metals, 2022, 47(10): 218-223.
[7]梁若, 庞思勤, 程冠华, 等. 34CrNiMo6 钢复合喷丸强化的有限元模拟[J]. 航空制造技术, 2017, 60(10): 99-103.
Liang Ruo, Pang Siqin, Cheng Guanhua, et al. Finite element simulation of 34CrNiMo6 steel after dual shot peening[J]. Aeronautical Manufacturing Technology, 2017, 60(10): 99-103.
[8]李晓喆. 齿轮渗碳, 渗氮硬化表面耐磨性研究[J]. 中国金属通报, 2018(6): 256-257.
Li Xiaozhe. Study on wear resistance of carburized and nitrided hardened gear surfaces[J]. China Metal Bulletin, 2018(6): 256-257.
[9]李春红, 伍强, 李波, 等. 表面氮化处理718H模具钢的表面组织与磨损性能[J]. 材料保护, 2020, 53(7): 41-60.
Li Chunhong, Wu Qiang, Li Bo, et al. Surface structure and wear resistance of 718H die steel treated by nitriding[J]. Materials Protection, 2020, 53(7): 41-60.
[10]肖金桐, 王洪林, 李珉. 表面渗碳 23CrNi3Mo 钢的微观组织及渗碳规律数学模型分析[J]. 铸造技术, 2015, 36(3): 653-654.
Xiao Jintong, Wang Honglin, Li Min. Microstructure of surface carburization 23CrNi3Mo steel and analysis on the mathematical model of carburizing law[J]. Foundry Technology, 2015, 36(3): 653-654.
[11]张威龙, 郑卫刚. 感应表面淬火在柴油机轴类热处理中的应用[J]. 表面工程资讯, 2013, 13(6): 13-14.
Zhang Weilong, Zheng Weigang. Application of induction surface hardening in heat treatment of diesel engine shafts[J]. Surface Engineering and Remanufacturing, 2013, 13(6): 13-14.
[12]Fabrice Garcia. Crankshaft fillet hardening: Challenges and prospects[J]. Industrial Heating, 2014(12): 47-48.
[13]雷发林, 王春龙. 大型工程机械中心轴表面淬火工艺试验研究[J]. 热加工工艺, 2019, 48(8): 185-188.
Lei Falin, Wang Chunlong. Experimental study on surface quenching technology of centra shaft of large-scale construction machinery[J]. Hot Working Technology, 2019, 48(8): 185-188.
[14]朱正德. 动力总成曲轴感应淬火表面强化工艺的应用[J]. 金属加工(热加工), 2018(2): 13-16.
[15]马静芬, 沈騛. 曲轴感应淬火开裂应对措施研究[J]. 金属加工(热加工), 2012(S2): 133-135.
[16]丁宗旭, 席刚刚. 发动机曲轴感应淬火的工艺改进试验研究[J]. 农业装备与车辆工程, 2022, 60(5): 112-115.
Ding Zongxu, Xi Ganggang. Experimental study on process improvement of induction hardening process of engine crankshaft[J]. Agricultural Equipment and Vehicle Engineering, 2022, 60(5): 112-115.
[17]李军迎, 陈学富, 杨钊, 等. 45钢曲轴的感应淬火工艺[J]. 金属热处理, 2013, 38(4): 67-68.
Li Junying, Chen Xuefu, Yang Zhao, et al. Induction hardening process of 45 steel crankshaft[J]. Heat Treatment of Metals, 2013, 38(4): 67-68.
[18]王会珍, 杨平, 毛卫民. 板条状马氏体形貌和惯习面的3D EBSD分析[J]. 材料工程, 2013(4): 74-80.
Wang Huizhen, Yang Ping, Mao Weimin. 3D EBSD analysis of morphology and habit plane for lath martensite[J]. Journal of Materials Engineering, 2013(4): 74-80.

Microscopic mechanism of induction hardening of 34CrNiMo6 steel crankshaft journal

PDF

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments

[1]	Cai Chenyang, Cao Tieshan, Wang Wei, Chi Qingxin, Cheng Congqian, Zhao Jie. Effect of long-term aging on microstructure and properties of nickel-based superalloy [J]. Heat Treatment of Metals, 2024, 49(1): 9-15.
[2]	Song Tijie, Wang Changyu, Wang Jue, Yu Yanyan, Lu Zengwei, Jin Dongyan. Effect of thermal exposure on microstructure and mechanical properties of Ti55 alloy [J]. Heat Treatment of Metals, 2024, 49(1): 15-21.
[3]	Zhu Jiawu, Ouyang Sheng. Effect of annealing on microstructure, mechanical properties and magnetic properties of FeCoNi_2-xMnGa_x high-entropy alloys [J]. Heat Treatment of Metals, 2024, 49(1): 22-31.
[4]	Li Zhongbo, Yuan Qing, Xu Shaopu, Zhang Tao, Chen Xi, Mo Jiaxuan, Ren Jie. Differences in hardness and microstructure of ultra-thick die steel 3Cr2Mo at different cooling rates [J]. Heat Treatment of Metals, 2024, 49(1): 31-38.
[5]	Sun Ning, Xu Zhiyuan, Yang Limin, Li Xinghui, Zhang Hao, Li Yancheng, Li Tao. Comparison on microstructure and properties of 6016 aluminum alloy sheet with different coils number of furnace charging [J]. Heat Treatment of Metals, 2024, 49(1): 39-47.
[6]	Yu Jinrui, Wu Kangjun, Yu Xinhong, Feng Yisheng, Zhao Ertuan. Isothermal transition characteristics of bainitic spring steels with segregation [J]. Heat Treatment of Metals, 2024, 49(1): 53-60.
[7]	Du Zhongze, Qi Zejiang, Dang Xue, Yang Tongyao. Rheological behavior and microstructure evolution of SCM435 steel under thermal compression [J]. Heat Treatment of Metals, 2024, 49(1): 76-83.
[8]	Yuan Hairui, Chen Yubo, Wang Peijie, Li Zhenjiang. 40Cr/Q345B bimetallic composite behavior and interfacial microstructure evolution [J]. Heat Treatment of Metals, 2024, 49(1): 90-95.
[9]	Jing Qingxiu, Peng Yong, Xiao Xiangpeng, Wei Dandan, Yang Xueqing, Hang Xiaodong. Effect of Fe content on microstructure and properties of Cu-Ti-Ni-xFe alloys [J]. Heat Treatment of Metals, 2024, 49(1): 96-102.
[10]	Chen Bowen, Zeng Qiang, Li Gang, Peng Wenya, Liu Guohuai. Effect of solution temperature on microstructure and tensile properties of DD416 nickel-based single crystal superalloy [J]. Heat Treatment of Metals, 2024, 49(1): 119-126.
[11]	Cui Yan, Liang Jiarui, Cao Leigang, Yang Yue, Liu Yuan. Effect of aging on mechanical properties of medium and high volume fraction SiC_p/2024Al composites [J]. Heat Treatment of Metals, 2024, 49(1): 131-136.
[12]	Xu Shuanghui, He Guoai. Effect of annealing temperature on microstructure and properties of Al-Ti toughened CrCoNi medium-entropy alloy [J]. Heat Treatment of Metals, 2024, 49(1): 142-147.
[13]	Zhang Wenyu, Liu Xianlan, Wu Jie, He Wenpeng, Tian Zihao, Quan Yang. Effect of solution temperature on microstructure and damping properties of Ti-Ta alloy [J]. Heat Treatment of Metals, 2024, 49(1): 166-171.
[14]	Liu Wenming, Zhang Xinming, Cheng Xinlu, Ouyang Kai. Effect of post-weld heat treatment on corrosion resistance of S30408/Q345R stainless steel clad plate [J]. Heat Treatment of Metals, 2024, 49(1): 172-178.
[15]	Tian Shaokun, Jin Yuanping, Wang Ping, Yang Kun, Liu Xiaofei, Guo Zhan, Yu Ruixing, Fan Qingli. Effect of aging treatment on mechanical properties and microstructure of low pressure cast ZL114A alloy [J]. Heat Treatment of Metals, 2024, 49(1): 179-185.