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本文开发研究了高效烧结金刚石钻头的新工艺。它较通用热压法,烧结温度降低40～80℃,烧结时间缩短2/3,烧结石墨模具用料节省约1/2,为制造优质金刚石钻头提供了一种新方法。 本文较详细地叙述了高效烧结钻头的特性。它与热压法相比,烧结后的金刚石强度高5N左右,胎体组织较均匀,粘结相被过饱和强化,位错强化明显,硬质相较分散,胎体含氧量较低,抗弯强度高20～30％。因而,高效烧结钻头钻进性能良好,金刚石出刃较完整,胎体耐磨性高。一般说,钻头使用寿命可提高50～100％,小时效率提高20～50％。
In this paper, a new technology of high efficiency sintered diamond bit was developed. Compared with the common hot pressing method, the sintering temperature is reduced by 40-80 ° C, the sintering time is shortened by 2/3, and the material of the sintered graphite mold is saved by about 1/2, which provides a new method for manufacturing high quality diamond bits. This paper describes in more detail the characteristics of a highly productive sintered drill. Compared with the hot pressing method, the sintered diamond has a high strength of about 5N, the carcass structure is more uniform, the bonding phase is supersaturated, the dislocation is obviously strengthened, the hard phase is relatively dispersed, the carcass has a lower oxygen content, Bending strength of 20 to 30%. Therefore, high efficiency sintered drill drilling performance is good, diamond blade more complete, high wear resistance of the carcass. In general, the bit life can be increased by 50 to 100%, hour efficiency increased by 20 to 50%.