Anti-impact diamond layer, diamond composite sheet and preparation method for diamond composite sheet

Abstract

The invention discloses an anti-impact diamond layer, an anti-impact diamond composite sheet and a preparation method for the diamond composite sheet. Coarse granular diamond is used as a main raw material, graphite is used as a filling agent, and iron-based powder is used as an accelerant; the diamond layer comprises the following components in part by weight: 70 to 80 parts of diamond, 10 to 20 parts of graphite powder, and 3 to 12 parts of accelerant; and the accelerant consists of the following materials in part by weight: 45 to 60 parts of iron, 15 to 20 parts of nickel, 5 to 15 parts of cobalt, 5 to 20 parts of manganese, and 3 to 10 parts of silicon. The method comprises the following steps of: mixing the raw materials in the ratio uniformly, pre-pressing the mixture and a hard alloy matrix into a composite sheet, filling into a pyrophyllite block to form a structural block, putting the structural block into a 6-surface diamond presser, sintering and electrolyzing at a high temperature under high pressure, and thus obtaining the diamond composite sheet. The diamond composite sheet has the characteristics of big pores and a mesh connection structure, and is quite suitable for drilling medium hard and hard strata due to excellent sharpness and impact toughness.

Description

technical field [0001] The invention relates to the field of superhard material products, in particular to an impact-resistant diamond layer, a diamond composite sheet and a preparation method thereof, which are mainly used in drilling operations in medium-hard and hard formations. Background technique [0002] Diamond composite sheet refers to a composite material made by adding a small amount of metal or non-metallic binder to diamond abrasive grains and synthesized at high temperature and high pressure. Because of its excellent properties such as high hardness, good thermal conductivity, and high impact resistance, It is widely used in oilfield mining, infrastructure construction, house maintenance, mechanical processing, geological exploration and other fields. With the development of science and technology, it has also become an indispensable key material in high-tech fields such as microelectronics, communications, and aerospace. At present, diamond compacts generally ...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the disadvantages of high hardness and high brittleness of the existing diamond composite sheet, which cannot meet the needs of drilling under large impact loads, the present invention provides an impact-resistant diamond layer, a diamond composite sheet and a preparation method thereof. The composite sheet prepared by the method has the advantages of strong impact resistance and good sharpness, and is especially suitable for mining and drilling in hard strata.