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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。 -
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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