摘要
研究了高强度钢内螺纹挤压强化对疲劳性能的影响。利用高精度云纹干涉法和扫描电镜,分别对螺纹牙根残余应力和疲劳试件断口进行了测试和观察。疲劳对比试验结果表明,在应力为500和600MPa的条件下,经挤压强化的300M高强度钢内螺纹的寿命是切削螺纹的4～30倍。
The effect of strengthening of internal threads by cold form tapping on the fatigue property of high strength steel is investigated. In order to study strengthening mechanism of formed threads residual stresses near to the root of the threads is measured by Moir interferometry, and the fracture of sample is surveyed by means of SEM. The results of fatigue tests show that fatigue lives of the threads of 300M steel strengthened by forming tap are form four to thirty times longer than those of cut threads under the stress of 500 and 600MPa.
出处
《材料导报》
EI
CAS
CSCD
北大核心
1999年第6期55-57,共3页
Materials Reports
基金
国家教委博士点基金
关键词
高强度钢
内螺纹
冷挤压
残余应力
疲劳
high strength steel
internal thread
cold form tapping
residual stress
