Effects of Niobium and Vanadium on Hydrogen-Induced Delayed Fracture in High Strength Spring Steel

被引：48
|
作者：
Zhang Chao-lei [1 ]
Liu Ya-zheng [1 ]
Jiang Chao [1 ]
Xiao Jin-fu [1 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
来源：
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL | 2011年 / 18卷 / 06期
关键词：
spring steel; microalloy; hydrogen-induced delayed fracture; slow strain rate technique; hydrogen permeation; BEHAVIOR; RESISTANCE;
D O I：
10.1016/S1006-706X(11)60077-0
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Influence of vanadium and/or niobium additions on delayed fracture behavior in high strength spring steel was studied by hydrogen permeation method and slow strain rate technique (SSRT), and its mechanism was analyzed. The results show that apparent diffusion coefficient of hydrogen in microalloyed spring steels Nb-V-steel and Nb-steel is lower than that in non-microalloyed steel 60Si2MnA. Percentage of strength reduction in SSRT in air after precharged hydrogen of the microalloyed steels is smaller than that of 60Si2MnA. Addition of the microalloys changes the fracture characteristics. Thence, vanadium and/or niobium additions are a very effective and economy means to improve the hydrogen-induced delayed fracture resistance of high strength spring steel.
引用
收藏
页码：49 / 53
页数：5
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