摘要
真空冶炼与电渣重熔2种工艺制备的GCr15轴承钢的超高周疲劳测试结果表明,电渣重熔能更好地控制钢中夹杂尺寸及其分散性,因此具有较好的疲劳性能.实验与理论分析表明,对于一定强度的材料,疲劳萌生处的颗粒亮区(GBF)边界处的应力强度因子范围(ΔK_(GBF))为一恒定值,且随材料的屈服强度增加ΔK_(GBF)逐渐减小。
It is demonstrated that electroslag remelting （ER） can control the inclusion size and its dispersibility better through comparing the very high cycle fatigue （VHCF） properties of two kinds of GCrl5 bearing steels prepared by vacuum melting （VM） and ER. Therefore, the specimens prepared by ER exhibit a better fatigue property. Experimental results and theoretical analysis demonstrate that the stress intensity factor range at the granular-bright facet （GBF） boundary,△KGBF, keeps a constant if the steels are with an identical strength, but it will decrease with the increase of yield strength.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2008年第8期968-972,共5页
Acta Metallurgica Sinica
基金
国家重点基础研究发展规划资助项目G2004CB619100~~
关键词
GCR15轴承钢
超高周疲劳
电渣重熔
颗粒亮区(GBF)
临界夹杂尺寸
GCr15 bearing steel, very high cycle fatigue, electroslag remelting, granular-brightfacet（GBF）, critical inclusion size
