Effect of cobalt content in cemented carbide on material properties

The cobalt content of cemented carbide has a significant impact on the properties of the material, including hardness, toughness, wear resistance and impact resistance. The following is the relationship between the cobalt content of cemented carbide and its performance

1.Hardness
Cemented carbide with lower cobalt content (such as less than 10%) usually has higher hardness because the bond between tungsten carbide particles is weak and is not easy to plastically deform. Hard alloy with higher cobalt content (such as more than 20%) The hardness of high-quality alloys is relatively low because the cobalt content increases and the bonding effect is strengthened, making the material more susceptible to plastic deformation when stressed.
2.Toughness:
Carbide with higher cobalt content has better toughness because the addition of cobalt increases the toughness of the material, making it less likely to break when subjected to impact or vibration.
·Cemented carbide with low cobalt content has poor toughness and is prone to cracks or fractures when impacted.

3. Wear resistance:
Carbide with a higher cobalt content has better wear resistance because cobalt can provide better bonding and wear resistance.
Carbide with lower cobalt content has poor wear resistance because the bond between tungsten carbide particles is not strong and easily falls off during wear.
4. Impact resistance:
Carbide with a higher cobalt content has better impact resistance because the addition of cobalt increases the material’s toughness and resistance to fracture.
Carbide with lower cobalt content has poor impact resistance and is prone to fracture when impacted.

5. Corrosion resistance
Carbide with higher cobalt content has better corrosion resistance because cobalt provides better resistance to oxidation and corrosion.
Carbide with low cobalt content has poor corrosion resistance and is prone to corrosion in harsh environments.