Q345GNHL weather resistant boardAdding special elements such as Si, Mn, etc. to ordinary steel can enhance the wear resistance of the steel plate; At the same time, alloying elements such as chromium and molybdenum were also used, with the main purpose of reducing the critical cooling rate of the steel, promoting the formation of martensite in the steel, and thus improving the weldability of the steel.

During the welding process of Q345GNHL weather resistant plate, due to various factors, the welded Q345GNHL weather resistant plate will experience stress and deformation. In this situation, it is necessary to find a method to control the welding stress and deformation of Q345GNHL weathering plate to ensure its welding quality.

It should be noted that effectively preventing stress and deformation of components during the welding process is the key to ensuring welding quality. In general, the symmetrical multi-layer and multi pass welding method can effectively prevent deformation of Q345GNHL weather resistant plate during the welding process.

Then hammer the welded Q345GNHL weather resistant plate, mainly around the weld seam, to eliminate and diffuse stress and prevent the possibility of further defects. In the welding process of Q345GNHL weather resistant plate, strict welding technology must be formulated to ensure welding quality.

In order to completely remove welding defects, mechanical processing or grinding with a corner grinding wheel can be chosen, but attention should be paid to the suitability of the groove. The preheating, layer temperature, and post heating range during welding repair should be appropriate, and the temperature should be consistent with the welding temperature.