What measures should be taken to improve the performance of welding weathering steel

Welding weathering steel is the same as ordinary weathering steel, which produces a dense oxide film on the surface after contacting with the atmosphere, thus preventing further oxidation of the atmosphere and the base layer. Welding weathering steel improves the weldability of steel on the basis of weathering steel. We should know that if we want to exert good weldability of welding weathering steel, we need to take some measures. What measures should be taken to improve the performance of welding weathering steel?

1. Choose alkaline low hydrogen electrode and flux. The alkaline low hydrogen electrode and flux welded joint have low hydrogen content, good desulfurization, dephosphorization performance and high impact toughness. Before use, it needs to be dried at 350-420 degrees Celsius for 1-2 hours, in order to effectively remove moisture, thus reducing the oxygen content of welded joints, and reducing the tendency of cold cracking of joints.

2. Welded spare parts must pass the inspection before they can be paired. No strong pairing is allowed to avoid excessive assembly stress.

3. Reasonable arrangement of welding sequence is based on the principle that the majority of welds can be welded with less stiffness to further reduce welding stress.

4. Preheating before welding, slow cooling or heat treatment after welding. Preheating before welding is usually an important technological measure to prevent welding cold cracks of high strength steel. Slow cooling or heat treatment after welding can make the diffused hydrogen fully escape, reduce welding residual stress, improve structure and reduce hardening, thus reducing the tendency of welding cold cracking. High strength weathering steels usually do not require preheating and slow cooling after welding.

The above is some ways to improve the performance of welding weathering steel. Welding weathering steel is a common weathering steel and an indispensable steel for bare buildings in our life. The appearance of welding weathering steel reduces the process of improving the welding performance of weathering steel and has a good application value in practical application.