The fatigue resistance of cemented carbide is related to many factors, including:
- Material composition: Depending on the composition of cemented carbide, its fatigue resistance will also change. For example, carbon is the main factor affecting the strength and toughness of alloys. Adding an appropriate amount of carbon to the alloy can improve its strength and toughness. At the same time, impurity elements present in the alloy, such as sulfur, phosphorus, etc., will adversely affect the fatigue properties of the material.
- Heat treatment state: Heat treatment is an important link in the manufacturing process of cemented carbide. The heat treatment state will have an important impact on the microstructure and mechanical properties of the alloy. For example, flaky pearlite and granular pearlite formed during heat treatment have different effects on the fatigue properties of the material. The fatigue strength of flaky pearlite is relatively low, while the fatigue strength of granular pearlite is relatively high.
- Microstructure: The microstructure of cemented carbide has a great impact on fatigue resistance. Refining the grains can improve the mechanical properties of the alloy and increase the fatigue strength of the material. In addition, the distribution characteristics of the composite structure and the proportion of each component will also affect the fatigue performance of the material.
- Surface treatment: Surface treatment of cemented carbide can change the surface state of the material, thereby affecting its fatigue performance. For example, surface coatings can effectively improve the corrosion resistance and wear resistance of the alloy, thereby improving its fatigue resistance.
To sum up, the fatigue resistance of cemented carbide is affected by many factors, including material composition, heat treatment state, microstructure, surface treatment, etc. By optimizing these factors, the fatigue resistance of cemented carbide can be effectively improved.
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