FAQ
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
Q&A in the same category in this question
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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。 -
Why does the amount of Co and WC particle size affect the thickness of the heat affected layer?
It is thought that when Co is in large quantities the fusing point is lowered, which increases the amount that melts and thickening the damaged layer.
It is also thought that when WC particle size is small, the material becomes easier to melt due to the volume effect, which thickens the damaged layer. -
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.
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