Process for producing tungsten carbide cobalt chrome metal composite powder

Abstract

The invention discloses a process for producing tungsten carbide cobalt chrome metal composite powder, comprising the following production steps: pre-preparing ammonium tungstate solution, cobalt nitrate solution and chromium nitrate solution; controlling the pH value by heating after controlling the concentration of ammonia in the ammonium tungstate solution; respectively adding the cobalt nitrate solution and chromium nitrate solution, and then stopping heating; adopting vacuum filtration to the solution for solid-liquid separation after cooling; obtaining a coprecipitation crystal; using ammonium nitrate solution to wash and soak the crystal and then draining and baking the crystal to implement calcination; using hydrogen to reduce the calcinated metal oxide to be metal reduction powder; and then using carbon dioxide gas to lead the metal reduction powder to be insulated from the air; adding carbon to the metal reduction powder for ball milling after low-temperature cooling; implementing low-temperature carbonization to the metal reduction powder which is added with the carbon; and finally obtaining the finished product by grinding, crushing and sieving. The process for producing tungsten carbide cobalt chrome metal composite powder has high product purity, high combined carbon content, good uniformity, normal distribution, complete particle size development, good main chemical component uniformity, and excellent use performance.

Description

technical field [0001] The invention relates to the production of tungsten products, in particular to a method for producing tungsten carbide cobalt chromium metal composite powder. Background technique [0002] my country's tungsten ore reserves account for more than half of the world's content. With the opening of the international market, tungsten production has developed rapidly in recent years, which has brought several practical problems: 1. The raw material prices of tungsten products continue to rise, cost increases, and enterprises are under great pressure. The products of domestic tungsten enterprises are single, most of them are tungsten powder, tungsten carbide powder and other production enterprises, and the added value of products is low. In recent years, with the expansion of the enterprise, the output has increased sharply, and the powder manufacturing capacity is relatively surplus, forming a situation of exchanging prices for customers, and the profit margi...

AI Technical Summary

Problems solved by technology

[0002] my country's tungsten ore reserves account for more than half of the world's content. With the opening of the international market, tungsten production has developed rapidly in recent years, which has brought about several practical problems: 1. The raw material prices of tungsten products continue to rise, cost increases, and enterprises are under great pressure

At present, many domestic tungsten production and processing enterprises produce alloy powder by mechanically mixing tungsten carbide powder + cobalt powder (or chromium oxide, vanadium oxide), which is a solid-solid mixture. The uniformity of the alloy powder is not ideal. Subsequent pressing of cemented carbide has a great influence on