How Much Influence Does Grain Size Have on Impact Resistance of Cemented Carbide?

The grain size has a certain influence on the impact resistance of cemented carbide. Generally speaking, the finer the grain size, the better the impact resistance of the alloy.

This is because finer grains allow the Co element in the alloy to have a larger mean free path, which is beneficial to increasing the porosity of the alloy, thereby increasing the transverse fracture strength and impact toughness of the alloy.

However, grain size is not the only factor that affects the impact resistance of cemented carbide. Factors such as the alloy’s composition, heat treatment, manufacturing process and usage environment will also affect its impact resistance.

Therefore, when preparing cemented carbide, multiple factors need to be considered to obtain an alloy with excellent impact resistance.

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