Effect of boronizing process on properties of 12Cr2Ni3Mo5 steel for automobile engine bearing

doi:10.13251/j.issn.0254-6051.2024.01.043

Abstract

Abstract: Taking 12Cr2Ni3Mo5 steel for automobile engine bearing as the tested material, the boronizing process and the properties of the steel were studied. The thickness, microhardness distribution, wear resistance and microstructure of the boronizing layer of the steel after boronizing at 850-1000 ℃ for 2-6 h were analyzed. The results show that the thickness of borided layer increases with the increase of boronizing temperature or boronizing time. When the boronizing time is 5 h, the hardness of the boronizing layer increases with the increase of boronizing temperature, which is much higher than the substrate hardness of 420 HV0.5. When the boronizing temperature is 1000 ℃, the hardness of the boronizing layer reaches a maximum of 1520 HV0.5. When the wear time is 60 min, the wear mass loss of the steel is 4.5, 3.2, 2.2 and 2.0 mg at boronizing temperature of 850, 900, 950 and 1000 ℃, respectively, which is significantly lower than that without boronizing (11 mg), indicating that the boronizing treatment can improve the hardness and wear resistance of the 12Cr2Ni3Mo5 steel. However, when the boronizing temperature exceeds 950 ℃ and the boronizing time exceeds 5 h, the improvement effect decreases significantly. Therefore, considering the property after boronizing and economic cost of boronizing process, the boronizing temperature of 950 ℃ and the holding time of 5 h is the best boronizing process for the 12Cr2Ni3Mo5 steel. Under this process, the thickness of the boronizing layer is 83 μm, the maximum hardness can reach 1432 HV0.5, and the microstructure of the boronizing layer is mainly Fe₂B phase.

Key words: boriding process, automobile bearing steel, microhardness, wear resistance

CLC Number:

TG146.15

Hu Ruihai, Feng Song, Zu Runqing, He Yi. Effect of boronizing process on properties of 12Cr2Ni3Mo5 steel for automobile engine bearing[J]. Heat Treatment of Metals, 2024, 49(1): 268-272.

References

[1]侯祥颖, 张钰哲, 张红, 等. 超越离合器研究现状及发展趋势分析[J]. 机械传动, 2021, 45(12): 162-169.
Hou Xiangying, Zhang Yuzhe, Zhang Hong, et al. Research status and development tendency analysis of overrunning clutch[J]. Journal of Mechanical Transmission, 2021, 45(12): 162-169.
[2]李丰. 高负荷发动机轴承合金材料试验与研究[J]. 汽车工艺与材料, 2022(7): 42-47.
Li Feng. Test and research on high load engine bearing alloy materials[J]. Automobile Technology and Material, 2022(7): 42-47.
[3]李小明. 渗硼工艺对汽车用45CrNiMoV热锻模具钢性能的影响[J]. 特殊钢, 2021, 42(1): 57-60.
Li Xiaoming. Influence of boronizing process on properties of hot forging die steel 45CrNiMoV for automobile[J]. Special Steel, 2021, 42(1): 57-60.
[4]张广安, 赵兴明, 赵荣达, 等. 固溶温度对18Cr2Ni4W合金渗硼后组织和性能的影响[J]. 热加工工艺, 2019, 48(2): 211-213.
Zhang Guang'an, Zhao Xingming, Zhao Rongda, et al. Effects of solid solution temperature on microstructure and mechanical property of 18Cr2Ni4W alloy after boriding[J]. Hot Working Technology, 2019, 48(2): 211-213.
[5]慕东, 龙尧, 邹高华, 等. Cr8Mo2SiV钢的渗硼层生长动力学及耐磨性[J]. 金属热处理, 2017, 43(5): 189-219.
Mu Dong, Long Yao, Zou Gaohua, et al. Growth kinetics of borided layer on Cr8Mo2SiV steel and its wear resistance[J]. Heat Treatment of Metals, 2017, 43(5): 189-219.
[6]权思佳, 宗晓明, 高飞, 等. 9Cr18不锈轴承钢渗硼层的组织特征与性能[J]. 特钢技术, 2020, 26(1): 6-11.
Quan Sijia, Zong Xiaoming, Gao Fei, et al. Microstructure and properties of borided 9Cr18 martensitic bearing stainless steel[J]. Special Steel Technology, 2020, 26(1): 6-11.
[7]杨清泉. 汽车发动机典型轴承热处理技术应用[J]. 金属加工, 2017(19): 1-3.
[8]陈欣, 杨伟东. 汽车发动机轴承故障分析[J]. 哈尔滨轴承, 2018, 39(2): 31-33.
Chen Xin, Yang Weidong. Fault analysis of car engine bearing[J]. Journal of Harbin Bearing, 2018, 39(2): 31-33.
[9]徐宏. Cr12钢表面渗硼层的摩擦磨损性能研究[J]. 南京工程学院学报, 2019, 17(4): 62-65.
Xu Hong. Friction and wear resistance of boronizing layer on surface of Cr12 steel[J].Journal of Nanjing Institute of Technology, 2019, 17(4): 62-65.
[10]李金平, 王建峰, 王攀. 不同渗硼处理工艺下H13钢的组织及抗熔损性能[J]. 机械工程材料, 2020, 44(2): 29-33.
Li Jinping, Wang Jianfeng, Wang Pan. Microstructure and soldering resistance of H13 steel under different boriding processes[J]. Materials for Mechanical Engineering, 2020, 44(2): 29-33.
[11]富玉竹, 王戈, 佟伟平. 渗硼温度对高钒耐磨钢渗硼层组织和性能的影响[J]. 稀有金属与硬质合金, 2020, 48(6): 77-82.
Fu Yuzhu, Wang Ge, Tong Weiping. Effect of boriding temperature on microstructure and performance of boronized layer on high vanadium wear resistant steel[J]. Rare Metals and Cemented Carbides, 2020, 48(6): 77-82.
[12]刘思萌, 张越, 马世图, 等. Cr12MoV表面渗硼工艺及渗硼层组织及耐磨耐蚀性能研究[J]. 新型工业化, 2016, 6(12): 15-19.
Liu Simeng, Zhang Yue, Ma Shitu, et al. Research on microstructure and wear/corrosion resistance of boriding layer on Cr12MoV prepared by powder pack method[J]. The Journal of New Industrialization, 2016, 6(12): 15-19.

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