摘要
介绍了采用逆焊接加热处理的方法后,Q235钢抗应力腐蚀及抗疲劳性能的影响及机理。在本实验中将Q235钢试件分别进行250℃和350℃加热处理,再用冷水只对焊缝处进行快速冷却,使焊接区获得比相邻区低的负温差,实现调整和消除焊接残余拉应力的目的。实验结果表明,逆焊接加热处理有效的降低了焊接残余应力,减缓了应力腐蚀速率,提高了Q235钢的抗疲劳性能。
It was introduced that the influence and mechanics of anti- welding procedure on corrosion resistance and fatigue resistance of Q235 steel. This method is to carry on the heat treatment for Q235 to 250℃ and 350 ℃,and use the cooling medium to cool the welding joint rapidly,in order to obtain the negative temperature departure that is opposite to the welding temperature field,and relieve the residual stresses produced in the welding process.The results show that the anti-welding procedure relieves effectively the welding line residual stresses ,slows up the stress corrosion rate and improve fatigue resistance ability of Q235 steel.
出处
《机械设计与制造》
北大核心
2009年第5期171-172,共2页
Machinery Design & Manufacture
关键词
逆焊接加热处理
焊接残余应力
应力腐蚀
疲劳性能
Anti-welding- procedure
Welding residual stress
Stress corrosion
Fatigue performance
