Low temperature annealing technology of Q295NH weathering steel plate

The annealing of Q295NH weathering steel plate can maintain the precise bright tube and dimensional accuracy of the Q295NH weathering steel plate, which is more and more popular with customers.

The cold-rolled strip annealing without surface oxidation and decarburization realized in the protection of Q295NH weathering steel plate. Protect Q295NH weathering steel plate with gas argon or helium, and mixed gas CO-H2-N2-CO2(DX), N2-H2(HNX), N2-CO2-H2, etc.

The composition of these mixed gases can be adjusted to make the oxidation and reduction, decarburization and carburization speeds of the Q295NH weathering steel plate equal in the annealing process, so as to realize the non-oxidation and non-decarburization annealing of the Q295NH weathering steel plate.