摘要
采用控冷工艺生产的20MnSi钢筋在焊接时热影响区性能有软化现象,软化区的存在使得钢筋的承载能力下降。通过控制焊接工艺参数和自回火温度可以控制软化区的宽度,从而改善钢筋的承载性能。基于C.M.Adams公式建立了自回火温度、焊接工艺参数和软化区宽度的模型,并在此基础上进行了分析。结果表明,自回火温度升高时,软化区宽度减小;预热温度升高或焊接热输入增大时,软化区宽度增大;小规格钢筋焊接HAZ软化区宽度较大规格钢筋大。
When the 20MnSi controlled cooling bar is welded, there is a softened zone in the heat affect zone. The softened zone can diminish the load-bearing ability of the bar. By means of controlling the weld process variables and self-temper temperature, the weld-softening zone width can be controlled, and then the load-bearing ability can be improved. The relation model between the self-temper temperature and the welding parameters is gotten and analyzed by using the C.M.Adams formula. The results show that the weld-softening zone width decreases as the self-temper temperature increases, the weld-softening zone widens as the preheating temperature or the heat input increases, and the weld-softening zone of the smaller diameter of bar is wider than that of the bigger diameter of bar.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2008年第12期46-48,共3页
Transactions of The China Welding Institution
基金
博士后科学基金资助项目(20060390657)
关键词
控制冷却
自回火温度
焊接热影响区
软化区
controlled cooling
self-temper temperature
heat affect zone
softened zone
