Process for coating diamond particles by cobalt powder

Abstract

The invention relates to a process for coating diamond particles by cobalt powder. The key points are as follows: the process comprises the steps of: blending a diluted agent, blending isopropanol and acetone according to a mole ratio of (3.5-4.5):1, and mixing the blended diluted agent with glue according to a weight ratio of (7-9):1 to form a binding agent; placing the diamond particles into a coating device; and spraying the blended binding agent into the coating device, sprinkling metal powder into the coating device, roll-dispersing the diamond particles evenly, thus completing the coating process. The process has the advantages that the process procedures are simple, and the cost can be lowered by more than 50% by adopting a technology of coating diamond particles by cobalt powder to substitute the mode that the cobalt powder is directly used as binding materials of a wear-resistant material in the prior art; and the new type blended diluted agent has low cost, the coating effect is obviously promoted by proportion of the diluted agent and the glue, thus finally leading the produced diamond products to be perfect.

Description

technical field

[0001] The invention belongs to the technical field of diamond products, and relates to a diamond particle used in a diamond product, in particular to a process for coating diamond particles with cobalt powder. Background technique

[0002] In the current diamond briquettes, cobalt is generally used as the bonding material for diamond wear-resistant materials. However, due to the lack of cobalt reserves in my country, it mainly relies on imports, making cobalt raw materials very expensive, reaching 900 yuan per kilogram at the most expensive time. , and the volume content of diamond particles in the diamond compact is actually small, about 8%, that is, about 92% of the volume is metal. The place that really holds the diamond particles from falling off is the metal around the diamond particles, while other The metal material of the place does not matter, as long as the wear resistance is close to that of cobalt powder. Therefore, it is too wasteful to u...

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