Study on Process Parameters and Properties of Q345 Steel in Using Submerged Arc Welding
The main ingredients and mechanical properties of Q345 steel were introduced.By taking the large I-shaped steel for example,the process problems of Q345 steel in using submerged arc welding were discussed.The Results show that using reasonable technical parameters and welding sequence can effectively prevent the welding parts from deforming and cracking.By mechanical properties test and microstructure analysis,it can be known that the hardness and strength of the weld joints are higher than the base while the plasticity and toughness are lower.