留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名
邮箱
手机号码
标题
留言内容
验证码

钒对高温渗碳SCM420H齿轮钢组织和淬透性的影响

刘年富 胡涛 田钱仁 王高峰 付建勋

刘年富, 胡涛, 田钱仁, 王高峰, 付建勋. 钒对高温渗碳SCM420H齿轮钢组织和淬透性的影响[J]. 钢铁钒钛, 2022, 43(3): 125-131. doi: 10.7513/j.issn.1004-7638.2022.03.020
引用本文: 刘年富, 胡涛, 田钱仁, 王高峰, 付建勋. 钒对高温渗碳SCM420H齿轮钢组织和淬透性的影响[J]. 钢铁钒钛, 2022, 43(3): 125-131. doi: 10.7513/j.issn.1004-7638.2022.03.020
Liu Nianfu, Hu Tao, Tian Qianren, Wang Gaofeng, Fu Jianxun. Microstructure and hardenability of vanadium microalloyed high temperature carburized SCM420H gear steel[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(3): 125-131. doi: 10.7513/j.issn.1004-7638.2022.03.020
Citation: Liu Nianfu, Hu Tao, Tian Qianren, Wang Gaofeng, Fu Jianxun. Microstructure and hardenability of vanadium microalloyed high temperature carburized SCM420H gear steel[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(3): 125-131. doi: 10.7513/j.issn.1004-7638.2022.03.020

钒对高温渗碳SCM420H齿轮钢组织和淬透性的影响

doi: 10.7513/j.issn.1004-7638.2022.03.020
详细信息
    作者简介:

    刘年富(1981—),男,博士研究生、高级工程师,研究方向:高品质特殊钢, E-mail: A28285@baosteel.com

    通讯作者:

    付建勋(1969—),男,博士、教授,研究方向:高品质特殊钢,E-mail: fujianxun@shu.edu.cn

  • 中图分类号: TF841.3,TF76

Microstructure and hardenability of vanadium microalloyed high temperature carburized SCM420H gear steel

  • 摘要: 对高温渗碳SCM420H齿轮钢进行了钒微合金化处理,并对钢中组织及淬透性进行了研究。结果表明:SCM420H齿轮钢中V含量和N含量应控制范围分别在0.03%~0.05%和0.012%~0.018%。MN(M=Ti,V)在966 ℃时析出并在559 ℃时向M(C,N)发生转化,常温时的M(C,N)质量百分数约为0.049%。将加热温度控制在1200 ℃±20 ℃,在预热段(室温升至850 ℃左右)加热时间控制在120 min内,在940~980 ℃高温渗碳保温6 h后,圆钢的带状组织控制在1.5~2级,奥氏体晶粒稳定在7.5~8级,M(C,N)主要为能起到钉扎晶界、细化奥氏体晶粒的纳米级球状V(C,N)。将连铸结晶器电磁搅拌强度参数调整为150 A,2.5 Hz,铸坯拉速为0.85 m/min,浇铸过热度为15~30 ℃,碳含量偏差值可控制在0.01%,碳含量的均匀化有利于淬透性的窄带化控制,钒微合金化后,试样的淬透性硬度值(HRC)最高为37,最低为35,淬透性带宽硬度值(HRC)≤3。
  • 图  1  碳偏析取样示意

    Figure  1.  Sampling points for carbon segregation determination

    图  2  V-N相平衡浓度曲线

    Figure  2.  Equilibrium concentration curve of V-N phase

    图  3  SCM420H钢主要物相相图

    Figure  3.  Phase diagram of main components of SCM420H steel

    图  4  960 ℃渗碳处理后钒微合金化SCM420H齿轮钢带状组织

    Figure  4.  Banded structures of V microalloyed SCM420H gear steel after carburization at 960 ℃

    图  5  960 ℃渗碳处理后钒微合金化SCM420H齿轮钢奥氏体晶粒度

    Figure  5.  Austenite grain size of V microalloyed SCM420H gear steel after carburization at 960 ℃

    图  6  钒微合金化SCM420H钢中的V(C,N)析出物

    Figure  6.  V(C, N) precipitation in vanadium microalloyed SCM420H steel

    图  7  不加V的SCM420H齿轮钢中奥氏体晶粒度

    Figure  7.  Austenite grain size of SCM420H gear steel without V addition

    图  8  圆钢碳偏析结果

    Figure  8.  Results of carbon segregation in bar steel

    图  9  不同试样端淬硬度值分布情况

    Figure  9.  Distribution of end-quenching harnesses of different samples

    表  1  SCM420H齿轮钢化学成分要求及设计范围

    Table  1.   Chemical compositions requirements and design range for SCM420H gear steel

    元素CSiMnPSCrVAlMoBN
    技术
    要求
    0.17
    ~
    0.23
    0.15
    ~
    0.35
    0.60
    ~
    0.90
    ≤ 0.025≤0.0251.00
    ~
    1.25
    0.015
    ~
    0.040
    0.15
    ~
    0.30
    0.010
    ~
    0.020
    内控
    范围
    0.19
    ~
    0.21
    0.20
    ~
    0.30
    0.82
    ~
    0.88
    ≤ 0.020≤0.0151.12
    ~
    1.16
    0.03
    ~
    0.05
    0.015
    ~
    0.035
    0.24
    ~
    0.26
    ≤0.00030.012
    ~
    0.018
    批次10.200.240.840.0110.0051.130.0370.0180.240.00010.0145
    批次20.200.250.850.0130.0041.140.0410.0220.250.00020.0161
    下载: 导出CSV

    表  2  圆钢显微组织情况

    Table  2.   Microstructures rating of steels

    圆钢带状组织/级不同保温温度下的晶粒度/级
    940 ℃960 ℃980 ℃
    批次12.08.08.07.5
    批次21.58.08.08.0
    下载: 导出CSV
  • [1] Zhang Guoqiang, He Xiaofei, Wei Wenchao, et al. Grain coarsening behavior of high temperature carburizing gear steels[J]. Iron & Steel, 2019,54(5):68−72,77. (张国强, 何肖飞, 尉文超, 等. 高温渗碳齿轮钢的晶粒粗化行为[J]. 钢铁, 2019,54(5):68−72,77.

    Zhang Guoqiang, He Xiaofei, Wei Wenchao, et al. Grain coarsening behavior of high temperature carburizing gear steels[J]. Steel, 2019, 54(5): 68-72+77.
    [2] Yang Yanhui, Wang Maoqiu, Chen Jingchao, et al. Research progress in gear steels for high temperature carburization[J]. Special Steel, 2013,34(1):22−24. (杨延辉, 王毛球, 陈敬超, 等. 高温渗碳齿轮钢的研究进展[J]. 特殊钢, 2013,34(1):22−24. doi: 10.3969/j.issn.1003-8620.2013.01.006

    Yang Yanhui, Wang Maoqiu, Chen Jingchao, et al. Research progress in gear steels for high temperature carburization[J]. Special Steel, 2013, 34(1): 22-24. doi: 10.3969/j.issn.1003-8620.2013.01.006
    [3] Zhang Huawei. Development and application of high temperature carburizing gear steel[J]. Nisco Technology and Management, 2015,(3):1−5,27. (张华伟. 高温渗碳齿轮钢研制与应用[J]. 南钢科技与管理, 2015,(3):1−5,27.

    Zhang hua wei. Development and application of high temperature carburizing gear steel. Nisco Technology And Management, 2015(3): 1-5+27.
    [4] Yang Yanhui, Wang Maoqiu, Chen Jingchao, et al. Fatigue properties of gear steels after high temperature carburizing[J]. Iron & Steel, 2013,48(7):53−57,83. (杨延辉, 王毛球, 陈敬超, 等. 齿轮钢高温渗碳后的疲劳性能[J]. 钢铁, 2013,48(7):53−57,83.

    Yang Yanhui, Wang Maoqiu, Chen Jingchao, et al. Fatigue properties of gear steels after high temperature carburizing[J]. Steel, 2013, 48(7): 53-57+83.
    [5] 刘连骞. 高温临界区渗碳细化晶粒20CrMn(Ti)-Al齿轮钢组织与性能研究[D]. 沈阳: 东北大学, 2015.

    Liu Lianqian. Study on microstructures and properties of 20CrMn(Ti)-A1gear steel: high temperature intercritical carburization grain refinement[D]. Shenyang: Northeastern University, 2015.
    [6] 刘年富, 岳峰, 包锋. 一种高温渗碳齿轮钢: 中国, ZL201810994814. X[P]. 2020-08-28.

    Liu Nianfu, Yue Feng, Bao Feng. High temperature carburized gear steel: China, ZL201810994814. X[P]. 2020-08-28.
    [7] Li Jiawang, Liu Fangce, Wang Qi, et al. Effect of oxide particles containing Ti on microstructure and mechanical properties of high-temperature hot-rolled low-carbon steel[J]. Transactions of Materials and Heat Treatment, 2021,42(6):82−90. (李家旺, 刘方策, 王琪, 等. 含Ti 氧化物对低碳钢高温热轧组织及力学性能的影响[J]. 材料热处理学报, 2021,42(6):82−90.

    Li Jiawang, Liu Fangce, Wang Qi, et al. Effect of oxide particles containing Ti on microstructure and mechanical properties of high-temperature hot-rolled low-carbon steel[J]. Transactions of Materials and Heat Treatment, 2021, 42(6): 82-90.
    [8] Miao Huajun, Zhao Xiaogang, Wang Zhixiang. The development of the high grade gear steel SCM420H[J]. Heavy Castings and Forgings, 2004,(2):12−14. (苗华军, 赵晓刚, 王之香. 高等级齿轮钢SCM420H的开发研制[J]. 大型铸锻件, 2004,(2):12−14. doi: 10.3969/j.issn.1004-5635.2004.02.005

    Miao Huajun, Zhao Xiaogang, Wang Zhixiang. The development of the high grade gear steel SCM420 H[J]. Heavy Castings and Forgings, 2004(2): 12-14. doi: 10.3969/j.issn.1004-5635.2004.02.005
    [9] 郑桂芸, 亓显玲, 王志明, 等. SCM420H高级汽车齿轮钢研制[J]. 山东冶金, 2008(4): 14-15.

    Zheng Guiyun, Qi Xianling, Wang Zhiming, et al. Development of high grade gear steel SCM420H for automobile[J]. Shandong Metallurgy, 2008(4): 14-15.
    [10] 中华人民共和国国家质量监督检验检疫总局. GB/T 13298—2015《金属显微组织检验方法》[S]. 北京: 中国标准出版社, 2015: 2.

    General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China. GB/T 13298-2015《Inspection methods of microstructure for metals》[S]. Beijing: China Standards Publishing House, 2015: 2.
    [11] 中华人民共和国国家质量监督检验检疫总局. GB/T 6394—2017《金属平均晶粒度测定方法》[S]. 北京: 中国标准出版社, 2017: 5.

    General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China. GB/T 6394—2017《Determination of estimating the average grain size of metal》[S]. Beijing: China Standards Publishing House, 2017: 5.
    [12] 中华人民共和国国家质量监督检验检疫总局. GB/T 225—2006《钢淬透性的末端淬火试验方法(Jominy试验)》[S]. 北京: 中国标准出版社, 2006: 2.

    General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China. GB/T 225-2006《SteeI hardenability test by end quenching(Jominy test)》[S]. Beijing: China Standards Publishing House, 2006: 2.
    [13] Yong Qilong, Zheng Lu. Solid solubility formula and stoichiometry on the composition design of microalloy steels[J]. Iron & Steel, 1988,23(7):47−51. (雍岐龙, 郑鲁. 固溶度积公式、理想化学配比值与微合金钢化学成分设计[J]. 钢铁, 1988,23(7):47−51.

    Yong Qilong, Zheng Lu. Solid solubility formula and stoichiometry on the composition design of microalloy steels[J]. Steel, 1988, 23(7): 47-51.
    [14] Liu Nianfu. Development of gear steel 20CrMnTiH with narrow hardenability band[J]. Special Steel, 2018,39(1):45−47. (刘年富. 窄淬透性带20CrMnTiH齿轮钢的开发[J]. 特殊钢, 2018,39(1):45−47.

    Liu Nianfu. Development of gear steel 20 CrCrMnTiH with narrow hardenability band[J]. Special Steel, 2018, 39 (1): 45-47.
    [15] Yan Huicheng. Effect of electromagnetic stirring on hardenability of gearing steel[J]. Metal Materials and Metallurgy Engineering, 2015,43(5):34−37. (颜慧成. 结晶器电磁搅拌对齿轮钢端淬检验值的影响[J]. 金属材料与冶金工程, 2015,43(5):34−37.

    Yan Huichen. Effect of electromagnetic stirring on hardenability of gearing steel[J]. Metal Materials and Metallurgy Engineering, 2015, 43(5): 34-37.
    [16] Gu Tie, Zhou Yuelin. Effect of thermal deformation on banded structure of SCM420H gear steel[J]. Modern Metallurgy, 2017,45(6):4−7. (顾铁, 周月林. 热变形对SCM420H齿轮钢带状组织的影响[J]. 现代冶金, 2017,45(6):4−7.

    Gu Tie, Zhou Yuelin. Effect of thermal deformation on banded structure of SCM420 H gear steel[J]. Modern Metallurgy, 2017, 45(6): 4-7.
  • 加载中
图(9) / 表(2)
计量
  • 文章访问数:  105
  • HTML全文浏览量:  13
  • PDF下载量:  35
  • 被引次数: 0
出版历程
  • 收稿日期:  2021-12-08
  • 刊出日期:  2022-06-30

目录

    /

    返回文章
    返回