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FAQ
What causes cemented carbide to crack?
Compared to metal materials, cemented carbide materials have a different thermal expansion coefficient. For this reason, cracks may occur in shrink/cooling-fitted products when the operating temperature is significantly higher (lower) than the designed value. When using cemented carbides with high hardness, problems such as cracking may occur by high impact, so the required fracture toughness value should also be carefully considered.
Q&A in the same category in this question
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What is the hardness of cemented carbides?
Generally, hardness can range from HRA88 to HRA92.
Higher hardness increases wearing resistance, but decreases impact resistance making it more prone to chipping. -
What kind of cemented carbide is used as cutting tools?
The material of cemented carbide to be selected depends on the workpiece and its thickness, etc. In general, for use as a cutting tool, ultrafine grain cemented carbide, which consists of ultrafine tungsten carbide (WC) particles, is often selected to increase cutting ability and to prevent chipping.
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What is the difference between cemented carbide and ceramics?
The hardness of ceramics approaches that of diamond, the hardest mineral on earth. If the hardness of diamond is 10, ceramics exhibit a hardness of 9 or higher, which is harder than tungsten and other hard metals. The difference in composition also results in a heavier weight in the case of cemented carbides. However, cemented carbides can be made with various characteristics depending on tungsten carbide (WC) particle size, the amount of bonding material, and additives, so it is possible to select the most suitable grade for the application from a wide range of available grades.
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