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FAQ
How do you store cemented carbide products?
For cemented carbide materials:
Storing at room temperature is fine. (Less than 300 in Celsius, as cobalt oxidizes at that temperature)
Humidity will leads to rusting, so we recommend storing the materials in an area with low humidity.
For complete metal molds:
Cemented Carbide corrosion can occur from grinding fluid, lubricating liquid, or other liquids.
If the grinding or lapping surface is not stored properly, corrosion may occur.
Store using a rust preventive oil or paper.
Q&A in the same category in this question
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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. -
超硬とサーメットの違いは何ですか？
超硬とサーメットはどちらも金属の炭化物や窒化物の粉末を金属結合剤と混合させて焼結した複合材料です。
ただし超硬合金が主成分の炭化タングステン（WC）を、主にコバルト（Co）やニッケル（Ni）で結合したものであるのに対し、
サーメットは炭化チタン（TiC）や炭窒化チタン（TiCN）などのチタン化合物をニッケル（Ni）やコバルト（Co）などで結合したものです。
つまり主成分の違いが超硬とサーメットの違いであるといえます。
詳しくはこちら： サーメットとは？用途や歴史、メリット・デメリットなど徹底解説 -
超硬材の硬度はどのくらいですか？
硬度はHRA88～92が一般的です。
硬度が高いと耐摩耗性は高くなりますが、耐衝撃性は悪くなり、欠けやすくなります。
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