Surface set natural diamond bit and production process

Abstract

The invention discloses a surface set natural diamond bit, the carcass surface is inserted with natural diamond. Its production processes are: the first step, bit carcass cold-pressed forming, and binding natural diamond on the pre-modeling blocks; the second step, putting the pre-modeling blocks into the graphite mold; the third step, laying steel body on the graphite mold; the fourth step, non-pressure sintering; the fifth step, machining and finishing the products. The surface set natural diamond bit produced through the invention cam avoid the defect of diamond can not be used fully of the ordinary man-made diamond bit working layer, the cold-pressed forming also avoids the phenomenon of metal powder leak in the heat pressing forming sintering process, the consumption of metal (or alloy) is saved. The drilling efficiency of the surface set natural diamond bit is increased 30%, the drilling life is increased 100%. The invention is a manufacture process of surface set natural diamond bit has long use life of nit, low sintering temperature and short sintering time.

Description

technical field [0001] The invention relates to a drill bit, in particular to a drill bit embedded with natural diamond on its surface, and also relates to a production process of the surface-embedded natural diamond drill bit. Background technique [0002] Diamond drill bits are widely used in geological exploration and drilling construction in departments such as geology, metallurgy, construction, hydropower, petroleum and national defense. [0003] The drill bits commonly used in the geological drilling industry are impregnated artificial diamond bits, which are mixed with various metal powders and diamonds and poured into graphite molds, and then inserted into the steel body to weld the matrix alloy formed by diamond and metal powders through intermediate frequency sintering. on a steel body. This type of drill bit has three major defects: 1. When the drill bit is used to the later stage, the diamond in the working layer cannot be fully utilized, especially when the wor...

AI Technical Summary

Problems solved by technology

This type of drill bit has three major defects: 1. When the drill bit is used to the later stage, the diamond in the working layer cannot be fully utilized, especially when the working layer wears close to the nozzle, the nozzle becomes shallow, and the drill bit cannot be used, resulting in a lot of waste of diamond; 2. Metal The amount of powder used is large, and the cost of the drill bit is high; 3. The composition of the metal powder must be selected reasonably, otherwise the diamond will not be easy to cut, resulting in the diamond not being able to capture the rock

The skeleton metal is put into the graphite mold. In the conventional process, the skeleton metal generally uses WC or W 2 C, the bezel setting is not firm, and the service life of the drill bit is short

High sintering temperature and long sintering time in conventional process

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