FAQ
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.
Q&A in the same category in this question
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超硬とハイスの違いは何ですか？
超硬合金は硬度が高く、耐熱性や強度に優れた合金です。 一方のハイス鋼は超硬合金と比べると強度や耐熱性は劣るものの、耐衝撃性は上回ります。 両者は原材料・製法が異なるため、コストの面でも大きな差があります。 使用する場面や導入後の買い替えのタイミングなどを考慮して、適した方を選びましょう。
詳しくはこちら：超硬合金（超硬質合金）とハイス鋼（高速度鋼）の違いは？利用に適した場面も紹介！ -
刃物に使われている超硬とは何ですか？
被加工材やその厚みなどによって選択すべき超硬合金の材質は変わりますが、一般的に刃物として使用する場合は、
切れ味重視や、チッピング対策を考えて、タングステンカーバイド（WC）の粒子を細かくした超微粒子超硬合金を
選定することが多くあります。 -
What is the relationship between hardness and strength?
Hardness affects resistance to abrasion, and harder the material the more resistant it is to abrasion.
However, amount of abrasion is not only determined by hardness, but could be affected by adhesions caused by workpieces of certain materials.
Thickness also affects the life of material, and so the environment and manufacturing process must be taken into consideration when selecting cemented carbide grade.
There are many factors related to strength, such as transverse rupture strength, impact strength, fracture toughness value and others, therefore material selection must be made in consideration of these factors.
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