FAQ
超硬合金の弱点は何ですか？
一般的な鉄合金と比較すると、靱性（ねばり強さ）が低く、刃先が欠けてしまう・剥離するといったような現象が起こることがあります。
また、比重が鉄の約2倍ありますので、重量が重くなることがデメリットとなる場合もあります。
Q&A in the same category in this question
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Are there any changes due to thermal conductivity?
Thermal conductivity is based on the amount of Co. Lower Co levels lead to higher conductivity.
Generally, higher conductivity means that heat escapes well and frictional heat can be controlled. -
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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