Failure Behavior of Ultra-high Cycle Fatigue of a 2 000 MPa Grade High Strength Steel

赵海民; 陈思联; 郝立群; 惠卫军; 董瀚; 翁宇庆

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Failure Behavior of Ultra-high Cycle Fatigue of a 2 000 MPa Grade High Strength Steel

更新时间：2026-01-21

- Failure Behavior of Ultra-high Cycle Fatigue of a 2 000 MPa Grade High Strength Steel
- Special Steel Vol. 29, Issue 3, Pages: 13-15(2008)
- 作者机构：
  
  1. 钢铁研究总院先进钢铁材料技术国家工程研究中心,北京,100081
  2. 云南大学,昆明,650091
  3. 中国金属学会,北京,100711
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：21 December 2022，
  
  Published：21 December 2008
- 稿件说明：
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赵海民, 陈思联, 郝立群, et al. Failure Behavior of Ultra-high Cycle Fatigue of a 2 000 MPa Grade High Strength Steel[J]. Special Steel, 2008, 29(3): 13-15.
DOI：

赵海民, 陈思联, 郝立群, et al. Failure Behavior of Ultra-high Cycle Fatigue of a 2 000 MPa Grade High Strength Steel[J]. Special Steel, 2008, 29(3): 13-15. DOI：

摘要

通过USF-2000超声波疲劳试验机研究了500 kg真空感应炉+电渣重熔冶炼的2000 MPa高强度钢(%:0.45C、2.0Si、0.9Cr、0.001S、0.005P、0.026Al、0.001 5O、0.002 8N)在共振频率20 kHz、载荷比R=-1

共振间隙150 ms时的超高周疲劳破坏行为。结果发现

疲劳裂纹大部分起源于钢中非金属夹杂物(夹杂平均尺寸12.3μm)

钢的疲劳强度和寿命随夹杂物增大而降低;内部夹杂物引起的疲劳破坏往往呈鱼眼型;随疲劳断口裂纹源夹杂物处应力场强度因子ΔK

inc

的减小

钢的疲劳寿命N

增加。

Abstract

The failure behavior of ultra-high cycle fatigue of a 2 000 MPa grade high strength steel (0.45C

2. OSi

0.9Cr

0.001S

0. 005P

0.026A1

0.001 50

0.002 8N) melted by 500 kg vacuum induction furnace + electro-slag remelting has been studied by USF-2000 ultrasonic fatigue test machine with resonant frequency 20 kHz

load ratio R = -1

resonant gap 150 ms. Results found that the fatigue crack originated mosdy from non-metallic inclusions (inclusion average size 12.3μm ) ； with increasing inclusion size both fatigue strength and fatigue life of steel decreased； fatigue failure area caused by inner inclusion presented fish-eye shape ； and with decreasing the stress intensity factor range ΔK

inc

at fatigue crack originated site of inclusion

the fatigue life N

of steel increased.

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