车轮轮辐钢S500LF的疲劳性能

doi:10.12068/j.issn.1005-3026.2020.08.014

东北大学学报:自然科学版 ›› 2020, Vol. 41 ›› Issue (8): 1148-1152.DOI: 10.12068/j.issn.1005-3026.2020.08.014

车轮轮辐钢S500LF的疲劳性能

高彩茹¹，朱长友¹，张大伟^1,2，杜林秀¹

(1. 东北大学轧制技术及连轧自动化国家重点实验室，辽宁沈阳110819; 2. 首钢技术研究院薄板研究所，北京100043)

收稿日期:2019-07-24 修回日期:2019-07-24 出版日期:2020-08-15 发布日期:2020-08-28
通讯作者: 高彩茹
作者简介:高彩茹(1965-)，女，内蒙古赤峰人，东北大学副教授，博士.
基金资助:
国家高技术研究发展计划项目(2015AA03A501).

Fatigue Property of Spoke Steel S500LF

GAO Cai-ru¹， ZHU Chang-you¹， ZHANG Da-wei^1,2， DU Lin-xiu¹

1. State Key Laboratory of Rolling Technology and Automation， Northeastern University， Shenyang 110819， China; 2. Sheet Research Institute， Shougang Research Institute of Technology， Beijing 100043， China.

Received:2019-07-24 Revised:2019-07-24 Online:2020-08-15 Published:2020-08-28
Contact: GAO Cai-ru
About author:-
Supported by:
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摘要/Abstract

摘要： 采用PX-100高频疲劳试验机，采用升降法在振动频率为100~120Hz、拉-压对称应力的条件下测定车轮轮辐钢S500LF的疲劳极限，并用数理统计方法分析确认疲劳极限为291MPa.此值作为母体50%存活率下的疲劳极限估计量时，以95%的置信度，相对误差不超过±5%.在测定的疲劳极限基础上，采用多试样法测得不同应力水平下的疲劳寿命，据此绘制出应力-寿命关系曲线，通过回归得到应力-寿命曲线方程.对试样断口进行了理论分析，结果表明试验钢韧性良好.

关键词: 轮辐钢, 疲劳极限, S-N曲线, 疲劳断口

Abstract: An experiment was carried out on the high frequency fatigue testing machine PX-100 and with the method of progressively increasing/decreasing stress to determine the fatigue limit of wheel spoke steel S500LF on the condition that the vibration frequency was 100~120Hz and the tensile-compressive stress was symmetrical. The fatigue limit was 291MPa by the mathematical statistical analysis. When this value was used as an estimator of the maternal 50% survival rate， the relative error was no more than ±5% with a confidence level of 95%. The fatigue life at different stress levels was measured by the multi-sample method according to the measured fatigue limit. Based on this， the S-N relation curve was drawn and the S-N curve equation was regressed. Besides， the fracture of the samples was analyzed theoretically， and the result shows the good toughness of the test steel.

Key words: spoke steel, fatigue limit, S-N curve, fatigue fracture

中图分类号:

TG335.3

高彩茹，朱长友，张大伟，杜林秀. 车轮轮辐钢S500LF的疲劳性能[J]. 东北大学学报:自然科学版, 2020, 41(8): 1148-1152.

GAO Cai-ru， ZHU Chang-you， ZHANG Da-wei， DU Lin-xiu. Fatigue Property of Spoke Steel S500LF[J]. Journal of Northeastern University Natural Science, 2020, 41(8): 1148-1152.

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车轮轮辐钢S500LF的疲劳性能

Fatigue Property of Spoke Steel S500LF

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