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在硬质合金基体上钎焊一层聚晶金刚石(PKD)和聚晶立方氮化硼(PKB)能同时具有金刚石的高硬度和硬质合金的韧性,是现代切削刀具材料的一项重要进展。聚晶金刚石和聚晶立方氮化硼都是在6万巴高压和1500℃以上的高温下合成的。聚晶超硬刀具的切削刃锋利度取决于原始粉末材料的颗粒大小,由此也决定其相应的使用范围。一般来说,原始颗粒尺
Brazing a layer of polycrystalline diamond (PKD) and polycrystalline cubic boron nitride (PKB) on a cemented carbide substrate can have both high hardness of diamond and toughness of cemented carbide and is an important advance in modern cutting tool materials . Both polycrystalline diamond and polycrystalline cubic boron nitride are synthesized at a pressure of 60,000 bar and a high temperature of 1,500 ° C or more. The cutting edge sharpness of polycrystalline superalloys depends on the particle size of the original powder material, which also determines its corresponding range of use. In general, the original particle size