How to prevent the surface of Q235NH weathering steel plate from cracking

Q235NH weathering steel plate cracking causes and countermeasures, poor weldability, resulting in failure to weld; set appropriate welding conditions. Repair bad weldments, resulting in poor welding. Matters needing attention in the cutting process. Contamination of the welding part (oil, water, dust removal) Set a proper welding speed after welding contamination.

Preventive measures for Q235NH weathering steel plate:
After heat treatment-blanking: quenching and annealing sites. Choose a material with excellent formability, phase change steel.

Improve the lubrication conditions, cracking and surface state of Q235NH weathering steel plate. Although there is no direct cause, the cracking rate can be reduced by improving the lubrication conditions and surface state of Q235NH weathering steel plate.