高牌号无取向电工钢疲劳寿命的统计分析

发布时间：2019-01-03 08:25

【摘要】：电工钢的疲劳性能是电动汽车电机结构设计和评估安全使用寿命的重要指标,P-S-N曲线能更加全面、准确地反映材料的应力-寿命关系。以一种无取向电工钢30WGP1600为研究对象,详细分析其疲劳性能的统计学特征,给出了50%、90%和99%不同存活率下的P-S-N曲线,并详细分析了电工钢疲劳寿命离散性大的原因。结果表明,随着应力水平的降低,疲劳寿命的分散性增加,表面粗糙度和晶界是影响电工钢疲劳寿命分散度的主要因素。
[Abstract]:The fatigue performance of electrical steel is an important index for the structural design of electric vehicle motor and the evaluation of safe service life. The P-S-N curve can reflect the stress-life relationship of materials more comprehensively and accurately. Taking a kind of non-oriented electrical steel 30WGP1600 as the research object, the statistical characteristics of its fatigue properties are analyzed in detail, and the P-S-N curves of 50% and 99% survival rates are given. The reasons for the large fatigue life dispersion of electrical steel are analyzed in detail. The results show that the dispersion of fatigue life increases with the decrease of stress level, and the surface roughness and grain boundary are the main factors affecting the fatigue life dispersion of electrical steel.
【作者单位】：武汉科技大学;武汉钢铁集团公司研究院;
【分类号】：U469.72;TM275

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