FAQ
超硬の主成分は何ですか？
超硬合金の主成分はタングステンカーバイド（WC）になります。これをコバルト（Co）やニッケル（Ni）で結合したものが超硬合金です。
それらにクロム（Cr）などの微量添加物を加えてさまざまな特徴を持った超硬合金をつくりだしています。
Q&A in the same category in this question
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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. -
超硬工具を使うメリットは？
超硬は、高温時の硬度低下が発生しにくい特徴があるため、切削時に工具が高温になりやすい高速での切削においても、
性能が低下しにくい点がメリットとなります。 -
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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