A kind of cemented carbide powder for producing nozzle and preparation method thereof

Abstract

The invention discloses cemented carbide powder used in production of nozzles, and a preparation method thereof. The cemented carbide powder comprises the following raw materials of WC, Ni, TiC, Co, Cr2C3 and TaC; the preparation method of the cemented carbide powder comprises the following steps: S1, weighting the raw materials for standby; S2, adding the raw materials weighted in S1 into a ball grinder, and using alcohol as a grinding media for performing ball mill; S3, drying powder subjected to ball mill by using a vapor dryer, and then adding adhesive Buna after drying; S4, again drying the power added with the adhesive Buna in S3, screening after drying to prepare the cemented carbide powder. According to the invention, the shortage of cobalt and tungsten resources in the world is effectively alleviated, and threat to human health caused by the fact that in the use process of the cemented carbide, cobalt can be oxidized to generate toxical Co6+; compared with nozzles produced by a traditional sintering process, the nozzles produced by using the cemented carbide powder provided by the invention have characteristics of light specific weight, high hardness, low cost, safety and environmental protection, and can meet quality requirements on bending strength.

Description

technical field [0001] The invention belongs to the field of metal alloys, and in particular relates to cemented carbide powder for producing nozzles and a preparation method thereof. Background technique [0002] The rapid development of modern industry requires a variety of injection devices. Various cleaning equipment in the machinery industry, spray dust removal in mining enterprises, spray cooling in the metallurgical industry, various coating lines in manufacturing industries such as motorcycles, bicycles, refrigerators, and washing machines, sandblasting and high-pressure water spraying for beautifying the surface of various objects A large number of nozzles are needed, but the nozzles made of high-speed steel and other materials in the past are not only difficult to process, but also have low hardness and poor wear resistance, resulting in poor spray stability and consistency, short service life, poor spray effect and extremely high cost. high. [0003] Cemented ca...

AI Technical Summary

Problems solved by technology

However, due to the limited cobalt resources in the world, in addition, cobalt may be oxidized into toxic Co during the use of cemented carbide. 6+ , poses a potential threat to human health, so finding and researching alternative materials for cobalt has always been an important topic in the research and production of cemented carbide; although China is a country with more tungsten reserves, since the invention of cemented carbide, it has always Tungsten is the main raw material, facing the increasing shortage of tungsten resources, and other substances or partial replacement of tungsten carbide have played a huge role in alleviating the shortage of resources, but the current use of other metal carbides and other substances as substitutes for tungsten carbide is hard. There are many problems such as the decline of various performance indicators of the alloy, the poor oxidation resistance and corrosion resistance of the alloy matrix, and the high production cost.

[0004] Chinese patent CN102328074A discloses a cemented carbide nozzle and its preparation method. The cemented carbide nozzle includes cemented carbide powder and a binder. The binder includes 10% to 17% of medical paraffin, 15% to 21% of ozokerite, High-density polyethylene 30%~55%, EVA resin 20%~32%; the method of producing cemented carbide nozzle is to mix cemented carbide powder and binder evenly, mix repeatedly, and then place it in an injection molding machine to obtain The blank is put into three polyethylenes to dissolve, degrease, and finally sintered in a vacuum furnace to form a finished product. Although the nozzle produced by this invention has strong wear resistance, high spray stability and consistency, long service life and low cost of use advantages, but did not disclose the specific composition of the nozzle alloy powder and the method of preparing the alloy powder