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Diamantbelagt skjoreverktoy av hardmetall og fremgangsmate for fremstilling derav
Diamantbelagt skjoreverktoy av hardmetall og fremgangsmate for fremstilling derav
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机译:金刚石涂层硬质合金切削刀具及其制造方法
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摘要
Diamond-coated hard metal cutting tool consists of a diamond layer on a substrate, and a carbon layer. The diamond layer is polycrystalline and the diamond crystals are statically orientated. The carbon layer has an amorphous structure and contains less than 70% covalent sp3 bonds of carbon atoms. An Independent claim is also included for a diamond-coated hard metal cutting tool comprising coating a hard metal base body with a crystalline diamond layer in a CVD process at above 800 degrees C, carrying out PVD-Re sputtering to change the sp3 diamond coating to an sp2 double bonds, and applying a carbon coating in a PVD process at less than 500 degrees C so that the carbon layer is formed as an amorphous structure by adding a reactive gas.
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