摘要
通过脉动拉伸试验研究了补焊道次对Q345B低合金钢焊接接头疲劳性能的影响。结果表明:与未补焊的接头相比,一次补焊后焊接接头的中值疲劳强度值略有下降(差4.6 MPa);二次补焊和一次补焊的中值疲劳强度基本相当,仅差0.7 MPa;疲劳裂纹启裂区和扩展区具有典型的疲劳断裂特征,终断区形貌为准解理和少量浅韧窝。
The effect of repairing welding passes on the fatigue property of Q345B low-alloy steel by pulsating fatigue test. The results show that the fatigue strength of once-repairing welding decreased slightly （only for 4. 6 MPa） comparing with that of non-repairing welding, and the fatigue strength of second-repairing welding basically match to that of once-repairing welding, the difference between them was only 0. 7 MPa. The eraekinitiation and propagation area of fatigue crack had the typical fatigue fracture characteristics, fatigue end broken area morphology was quasi-cleavage and little dimple.
出处
《机械工程材料》
CAS
CSCD
北大核心
2012年第11期69-71,75,共4页
Materials For Mechanical Engineering
关键词
Q345B低合金钢
补焊
焊接接头
疲劳性能
Q345B low alloy steel
repairing welding
welded joint
fatigue property
