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FAQ
What are the advantages of using cemented carbide tools?
As cemented carbide is characterized by its resistance to loss of hardness at high temperatures, its performance is not easily deteriorated even when used for machining at high speed that cause tools to have high temperatures.
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What are the effects of corrosion?
We checked a cemented carbide made 20 years ago, and verified 20 microns worth of corrosion.
Only the surface was corroded, so we were able to remove it by reprocessing it.
However, there are cases where some corrosion cannot be removed due to working environments, so we recommend regrinding if the corrosion is 0.1mm or greater. If storing after regrinding, ensure that all processing liquids have been removed and dried. Apply the carbide with rust preventive oil or paper, or cover in alumina powder. -
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.
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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.
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