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CN104769209A 具有耐腐蚀性的超硬结构 有权

具有耐腐蚀性的超硬结构
摘要：
超硬结构(10)包括多晶金刚石本体(12)、与本体连接的第一金属基体(14)以及附连到所述第一金属基体(14)的第二金属基体(16)。第一和第二基体(14，16)各包括第一硬颗粒相和第二结合剂相，其中，在第二基体(16)中的硬颗粒的尺寸比在所述第一基体(14)中的要大。所述第一基体(14)可以比第二基体(16)含有更大量的结合剂材料。所述第一基体(14)有利于在高温高压条件下烧结金刚石本体(12)，并且当置于最终应用中时，所述第二基体(16)提供了改善的耐腐蚀性。可以在单个高温高压处理中形成此结构。第二基体(16)可以包含第一及第二基体(14，16)的组合厚度的80％或更多。
摘要（英）：

Ultra-hard constructions (10) comprise a polycrystalline diamond-body (12), a first metallic substrate (14) attached thereto, and a second metallic substrate (16) attached to the first metallic substrate (14). The first and second substrates (14, 16) each comprise a first hard particle phase and a second binder material phase, where the hard particles in the second substrate (16) are sized larger than those in the first substrate (14). The first substrate (14) may contain a greater amount of binder material than the second substrate (16). The first substrate (14) facilitates sintering the diamond body (12) during HPHT conditions, and the second substrate (16) provides an improved degree of erosion resistance when placed in an end-use application. The construction may be formed during a single HPHT process. The second substrate (16) may comprise 80 percent or more of the combined thickness of the first and second substrates (14, 16).

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