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超声强化对高强钢疲劳性能的影响

丛家慧 徐永臻 王磊 回丽 周松

丛家慧, 徐永臻, 王磊, 回丽, 周松. 超声强化对高强钢疲劳性能的影响[J]. 机械科学与技术, 2021, 40(3): 470-474. doi: 10.13433/j.cnki.1003-8728.20200063
引用本文: 丛家慧, 徐永臻, 王磊, 回丽, 周松. 超声强化对高强钢疲劳性能的影响[J]. 机械科学与技术, 2021, 40(3): 470-474. doi: 10.13433/j.cnki.1003-8728.20200063
CONG Jiahui, XU Yongzhen, WANG Lei, HUI Li, ZHOU Song. Effect of Ultrasonic Strengthening on Fatigue Property of 30CrMnSiNi2A High-strength Steel[J]. Mechanical Science and Technology for Aerospace Engineering, 2021, 40(3): 470-474. doi: 10.13433/j.cnki.1003-8728.20200063
Citation: CONG Jiahui, XU Yongzhen, WANG Lei, HUI Li, ZHOU Song. Effect of Ultrasonic Strengthening on Fatigue Property of 30CrMnSiNi2A High-strength Steel[J]. Mechanical Science and Technology for Aerospace Engineering, 2021, 40(3): 470-474. doi: 10.13433/j.cnki.1003-8728.20200063

超声强化对高强钢疲劳性能的影响

doi: 10.13433/j.cnki.1003-8728.20200063
基金项目: 

东北大学航空动力装备振动及控制教育部重点实验室基金项目 VCAME201908

详细信息
    作者简介:

    丛家慧(1980-), 讲师, 硕士生导师, 博士研究生, 研究方向为航空材料及焊接结构强度评定、损伤修复与寿命分析, congjiahui2011@163.com

  • 中图分类号: TG178

Effect of Ultrasonic Strengthening on Fatigue Property of 30CrMnSiNi2A High-strength Steel

  • 摘要: 超声强化技术可用来改善材料表面完整性以提高其疲劳性能。本文针对超声滚压强化对低合金高强钢疲劳性能的影响进行研究,通过分析超声强化的强化机理及疲劳试样实验,采用金相显微镜、微观硬度仪及扫描电镜对30CrMnSiNi2A疲劳试样进行微观结构及显微硬度的测试,结果表明,经过超声强化后试样表面出现一层强化层,组织更为细密,显微维氏硬度与未表面强化的试样相比提高了9.8%。在1 400 MPa应力作用下,30CrMnSiNi2A高强钢试样的疲劳寿命较传统抛光下的试样增加了38.4%。
  • 图  1  超声强化实验系统装置图

    图  2  试样的几何形状及尺寸

    图  3  高强钢表层显微组织图片

    图  4  各测试点维氏硬度值

    图  5  钢30CrMnSiNi2A S-N曲线

    图  6  钢试样的疲劳试样断口对比

    表  1  30CrMnSiNi2A高强钢的化学成分 %

    w(C) w(Mn) w(Si) w(Cr) w(Ni) w(S) w(Fe)
    0.31 1.20 1.10 1.12 1.65 0.016 余量
    下载: 导出CSV

    表  2  硬度数据处理结果

    试样材料 试样状态 维氏硬度
    均值/HV
    维氏硬度
    标准差
    30CrMnSiNi2A 未强化 459.2 5.937
    超声强化后 504.5 7.316
    下载: 导出CSV

    表  3  钢30CrMnSiNi2A(Kt=1)试样疲劳试验结果

    表面状态 σmax/MPa N/千周
    GPL1 1 400 69.9, 30.3, 15.6, 10.1, 30.8
    1 200 48.7, 61.4, 192.3, 35.8, 58.1
    GPL2 1 400 34.6, 33.4, 31.6, 42.3, 33.8
    1 200 29.3, 138.3, 63.4, 112, 119.5
    下载: 导出CSV

    表  4  钢30CrMnSiNi2A(Kt=1)试样S-N曲线拟合结果

    试验环境 表面状态 应力比 S-N曲线拟合方程
    室温空气 GPL1
    GPL2
    R=0.06 lgN=50.077-14.569×lgσmax
    lgN=59.734-17.617×lgσmax
    下载: 导出CSV
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出版历程
  • 收稿日期:  2019-10-31
  • 刊出日期:  2021-03-01

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