S355K2G2W weathering steel surface heat treatment process

After the surface of S355K2G2W weathering steel is heated and cooled, the metal heat treatment process of the surface properties changes. The performance of S355K2G2W weathering steel cannot be improved without heat treatment, and solution treatment is one of the important steps in surface heat treatment. Only a better understanding of S355K2G2W weathering steel solution treatment and surface heat treatment can be better applied.

The heating temperature of S355K2G2W weathering steel solution treatment is generally between 780-820 for surface heat treatment. 760-780 is used for S355K2G2W weathering steel material as an elastic member, mainly to prevent coarse particles from affecting the strength. The furnace temperature for uniform solution treatment should be strictly controlled at 5. Generally, the holding time can be calculated as 1 hour/25 mm.

In order to avoid oxidation of S355K2G2W weathering steel, it should be heated in a vacuum furnace or ammonia decomposition, inert gas and reducing atmosphere to obtain a bright surface heat treatment effect. In addition, the transfer time should be shortened as much as possible, otherwise it will affect the heat treatment effect of S355K2G2W weathering steel after aging.