高周疲劳条件下高强钢临界夹杂物尺寸估算

金属学报, 2005, 41(11): 1136-1142.

高周疲劳条件下高强钢临界夹杂物尺寸估算

杨振国 , 张继明 , 李守新 , 李广义 , 王清远 , 惠卫军 , 翁宇庆

中国科学院金属研究所沈阳材料科学国家(联合)实验室

Shenyang National Laboratory for Materials Science

Institute of Metal Research

The Chinese Academy of Sciences

关键词：高强钢 , Vickers hardness , surface roughness

Estimation of the critical size of inclusion in high strength steel under high cycle fatigue condition

YANG Zhenguo , ZHANG Jiming , LI Shouxin , LI Guangyi , WANG Qingyuan HUI Weijun , WENG Yuqing , null

Keywords： high strength steel , Vickers硬度 , 表面粗糙度

依据Murakami的“夹杂物等效投影面积模型”估算了在高周疲劳条件下一定硬度(或强度)高强钢的“临界夹杂物尺寸”. 估算结果表明, 随着钢硬度(或强度)的增加, “临界夹杂物尺寸”逐渐减小; “临界夹杂物尺寸”也受构件表面机加工粗糙度的影响, 表面越光洁, 这个尺寸也越小.从本文几种钢的实验数据以及其它已发表的数据都可以间接证明, 估算的临界尺寸是合理的

The critical inclusion sizes (CIS) of some steels with given matrix hardness or tensile strength and surface roughness under high cycle fatigue condition were estimated mainly on the basis of Murakami's theory, i.e., the inclusion equivalent projected area model. The results show that the CIS decreases with increasing Vickers hardness (or tensile strength) and decreasing surface roughness of specimen. The estimated CIS is supported indirectly by the experimental data from present study and previous publications available.

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