Nano-tungsten carbide - cobalt - vanadium carbide manufacturing method

The present invention provides a nano tungsten carbide - cobalt - vanadium carbide cemented carbide manufacturing method, comprising the hydrogen reduction reaction of carbonation. Specific steps are as follows:

1) The percentage by weight of the component nano cemented carbide WC-Co-VC is set, i.e., set the alloy component content of WC 70-95wt%, Co content is 3 ~ 28wt%, VC is 0.1 ~ 2wt%, take the appropriate amine tungstate solution containing an amount of W, Co-containing solution, the amount of cobalt nitrate, vanadium chloride solution containing aqueous ammonia, the amount of V is incorporated, and adding an appropriate amount of polyethylene glycol diamine and mix well;

2) Nitric acid was added to adjust PH value to 1.6 to 2.0 to precipitate WO3, CoO, V3O5 nanoparticles;

3) Removal of ammonia, the above paste-like mixture into the container 1 to the calcined for 3 hours at 600 ~ 800 ℃, the formation of WO3, CoO, V2O5 nano powder mixture;

4) The above mixture was placed in a quartz boat in a quartz tube within, the quartz tube was evacuated to exclude oxygen;

5) Pass into the hydrogen reduction, hydrogen purity of 99. 99%, through the hydrogen gas for 1 to 3 hours to obtain a metal W, Co, V nano-powder;

6) Turn off the hydrogen to high-purity quartz tube filled with acetylene C2H2 gas metal carbide W, V nano-powders, carbonization temperature of 500 ~ 950 ℃, carbonization time is 0.5 to 3 hours, the optimum carbonization temperature of 600 ~ 900 ℃, carbonization time is 1 to 2 hours to obtain a WC-Co-VC nanoparticle composite powder;

7) Vacuum hot pressing and sintering process, made ​​WC-Co-VC nano-carbide bulk material.

The present invention provides nano tungsten carbide - cobalt - vanadium carbide carbide manufacturing method, the obtained product mechanical strength, abrasion resistance and other technical performance indicators are better than existing technology can be widely used in the production of tools, dies, measuring tools, mining drill and a variety of wear-resistant parts.


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