钎焊工艺对双层焊管材料时效性能的影响
Effects of Brazing Process on Aging Performance of Double-Layer Welded Tube
刘顺明 1张志敏 2龙佳明 1庞二帅 1梁斌 1李悦 1刘再旺2
作者信息
- 1. 首钢京唐钢铁联合有限责任公司 制造部,河北 唐山 063210
- 2. 首钢集团有限公司技术研究院,北京 100043
- 折叠
摘要
使用退火模拟器对双层焊管用钢带进行热处理,模拟其在不同制管速度、钎焊温度下的钎焊过程.使用拉伸试验机检测不同钎焊温度及不同制管速度下钢带的屈服点延伸率和时效指数,以研究钎焊温度和制管速度对双层焊管材料时效性能的影响.结果表明,钎焊温度越高,材料的屈服点延伸率越小,时效指数也越小,制管的抗时效性越好.随着制管速度的提高,钎焊后钢带的屈服点延伸率和时效指数均呈增大趋势,抗时效性变差.这是由于制管生产速度增大,冷却段时间变短,渗碳体析出量减小造成的.钎焊前钢带时效指数为 10.6 MPa,模拟钎焊后钢带的时效指数为76.8～104.9 MPa,其抗时效性明显变差.
Abstract
Heat treatment tests of the steel sheets were carried out with multi-purpose annealing simulator for simulating brazing process of double-layer tube at different production speeds and brazing temperatures.Percentage yield point extension and aging index of the steel sheets brazed at different temperatures and different production speeds were measured by using tensile testing machine to study the effect of brazing temperature and tube production speed on the aging performance of double-layer welded tube.The results show that the higher the brazing temperature is,the lower the percentage yield point extension and the aging index are,the better the aging resistance of double-layer welded tube is.With the increase of the production speed,the percentage yield point extension and the aging index of the steel sheet increase,and the aging resistance becomes worse.This is due to the increase of the tube production speed,the shortening of the time of cooling age and the reduction of the content of the precipitated cementite.The aging index of the steel sheet before brazing is 10.6 MPa,it is 76.8-104.9 MPa after simualted brazing,and the aging resistance of the steel sheet obviously gets worse.
关键词
双层焊管/时效指数/钎焊工艺Key words
double-layer welded tube/aging index/brazing process引用本文复制引用
出版年
2024
NETL
NSTL
万方数据