Effect of Trace Iron and Cobalt on Tungsten Carbide
- Details
- Category: Tungsten Information
- Published on Thursday, 26 October 2017 20:55
The production process of tungsten carbide is a refining process as well as doping process. Cobalt content doesn't increase significantly in the process of tungsten carbide production.
Although the content of iron and cobalt in alloy production can be very high, but the technical conditions of tungsten carbide, iron and cobalt elements are considered as metal impurities, generally required in 0.03%, 0.01%, when their content reaches a certain value, the morphology and particle size of carbonized tungsten carbide will be changed, and the quality control and production cost of tungsten carbide production will be affected.
In order to verify the effect of trace elements on iron, cobalt tungsten carbide, some scholars use in the process of preparation of tungsten carbide, followed by adding different content of iron or cobalt, after mixing into the carbonization carbonization furnace, and then milling and sieving.
The following phenomena are found by studying the samples obtained.
1.With the increase of iron and cobalt content, tungsten carbide shrinkage in the process of carbonization is serious, shrinkage block is difficult to break, more sieve matter.
2.The addition of different iron and cobalt in tungsten powder can make the Fsss particle size of tungsten carbide become thicker, and the tungsten carbide block is difficult to be broken.
3.When Fe < 0.03% or Co < 0.02%, the morphology of tungsten carbide particles is approximately spherical, and the morphology of tungsten carbide has no obvious influence. When Fe ≥ 0. 059% or Co ≥ 0. 037%, the morphology of tungsten carbide showed angular polygonal, unmixed flower cauliflower, tungsten carbide morphology changed significantly.
Simple experiments show that when Fe ≥ 0. 059% or Co ≥ 0. 037%, the morphology of tungsten carbide will change, its performance will be greatly reduced.
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