In Chromium Carbide Overlay Plates, the main roles of niobium (Nb) are as follows:

1.Grain Refinement

Niobium forms stable compounds with carbon and nitrogen, inhibiting grain growth and refining the steel grains, thereby enhancing the material strength and toughness.

2.Improved Wear Resistance

Niobium carbides and nitrides are highly hard, which enhances the wear resistance of the steel plate and extends its service life.

3.Enhanced High-Temperature Performance

Niobium compounds remain stable at high temperatures, helping to maintain the steel plate high-temperature strength and creep resistance.

4.Improved Weldability

Niobium reduces grain coarsening in the heat-affected zone during welding, improving the performance of welded joints.

5.Increased Corrosion Resistance

The addition of niobium can enhance the steel plate corrosion resistance in specific environments.