Surface-hardened nodular cast iron brake disc

The utility model provides a surface-hardened nodular cast iron brake disc, comprising a nodular cast iron layer, characterized in that: a composite layer of hard ceramic particles and a nodular cast iron is arranged on the working surface of the nodular cast iron layer. The thickness of the composite layer of the hard ceramic particles and the nodular cast iron is 2-5mm. The working surface of the nodular cast iron layer not only has the anti-wear property of the ceramic particles but also has the intensity, the plastic toughness and anti-fatigue property of the nodular cast iron. The hard phase of the ceramic particles on the surface does not fall off and break. The cost is low, the service life is long and 4-6 times of that of the traditional nodular cast iron brake disc.