"Kori" wrote in message
...
When I am making a tool bit out of tungsten carbide, do I have to keep it
cool? Does heat change it's hardness, or does this just apply to tempered
steel?

Considering brazed carbide exists, I don't think you have to worry about
that... Just don't cool it quickly (e.g. quenching) or you'll crack it.
I'd guess either going full-bore or slowly with a water-cooled stone.

Tim

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