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US5335738A Tools for percussive and rotary crushing rock

Patent Us5335738 Tools For Percussive And Rotary Crushing

The present invention relates to a rock bit button of cemented carbide for percussive or rotary crushing rock drilling. The button is provided with a layer of diamond produced at high pressure and high temperature in the diamond stable area. The cemented carbide has a multiphase structure having a core that contains etaphase surrounded by a surface zone of cemented carbide free of etaphase.

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    The present invention relates to a rock bit button of cemented carbide for percussive or rotary crushing rock drilling. The button is provided with a layer of diamond produced at high pressure and high temperature in the diamond stable area. The cemented carbide has a multiphase structure having a core that contains etaphase surrounded by a surface zone of cemented carbide free of etaphase.

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