Testing method of tungsten content in sodium tungstate, which is using cinchonine hydrochloride to separate tungstic acid, then calcine to get tungsten trioxide, weight, colorimetric to calculate tungsten content.

Reproduced tungsten carbide powder refers to WC which obtained from waste hard alloy, can be divided into four grades of WCH-1, WCH-2, WCH-3, WCH-4 depending on raw material.

Sodium tungstate solution is an aqueous solution of solid sodium tungstate, the raw material of ammonium paratungstate (APT), ammonium metatungstate (AMT) ect.

Nickel based tungsten carbide powder mainly refers to add tungsten carbide powder (WC) on the basis of self-fluxing nickel-based alloy to enhance its hardness and wear-resistant, can be used for surface spray of oil drill pipe joints, reamers ect., with preparation methods of atomization, mechanical mixing and sintering method.

Wide specification tungsten powder is a kind of tungsten powder, whose grain size are not so gathered in a grain size.

Of the highest quality and purity, the specially prepared crystalline tungsten powders produced at Chinatungsten Online are large particle size tungsten powders beyond the range of the FSSS, classified by mesh size.

Ultrafine tungsten carbide powder is grain size < 1um.

Tungsten carbide granlue used to be welded onto the surface of the tools or work parts to form a hardened wear-resistant layer in order to provide protection against  abrasive wear and therefore increase the service life of the tools and work parts.

Cast tungsten carbide: particle size should be in line with: powder weight percentage for upper size should be no more than 5%.

Tungsten carbide sintering process can be divided into four basic stages:

1. Removal of forming agent and pre-burning stage

2. Solid phase sintering stage

3. Liquid phase sintering stage

4. Cooling stage