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FAQ
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.
Q&A in the same category in this question
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超硬が割れる原因は何ですか？
超硬材料は、金属材料に比べて熱膨張率が違います。 このため、焼きばめ／冷しばめされた製品は、
使用温度が設計値と事なり著しく高い（低い）場合、割れが発生する事があります。
また、硬度が高い超硬合金を使用する際には、大きい衝撃がかかると割れなどの問題が発生する場合もあるので破壊靭性値にも注意して選定していく必要があります。 -
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. -
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.
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