Tungsten Oxide

At present, 50 to 60% of the world's tungsten is used for the manufacture of tungsten carbide. Among them, rock drills in mining tools, three-cone drills in oil extraction, and coarse-grain tungsten carbide used in the hobs of tunnel shield machines account for a considerable part of tungsten carbide. As the main product of tungsten resource consumption, tungsten carbide can be used as the raw material to synthesize tungsten carbide directly. The tungsten carbide particles can greatly shorten the smelting process, and the ultra coarse grain tungsten carbide particles are widely used in mine rock drilling tools, which have higher added value than the general tungsten carbide. Some scholars have proposed a method for preparing coarse grained tungsten carbide directly from tungsten ores. The main process is as follows: Synthetic scheelite was synthesized from pure sodium tungstate and calcium chloride. Spare after drying. According to the mass ratio of 33:43:8:9:7 to weighing artific...

Thermal sprayed tungsten carbide / cobalt cermet is widely used in aerospace, metallurgy, machinery and other fields due to its good hardness and toughness. Thermal spraying (spray welding), surfacing and other processes are gradually becoming the commonly used alloy, steel material anti-wear and surface corrosion technology measures. Tungsten carbide / cobalt thermal spraying technology has a simple process compared with other thin film and coating preparation technology, the coating and substrate have a wide range of selection, a large range of coating thickness, high deposition efficiency and easy to form composite coating.  The wear resistance of alloy is a systematic engineering problem. The material is only an important aspect to measure the grindability. In addition, it is also related to the stress state, surface structure, lubrication conditions, environmental temperature and other factors. The characteristics of thermal spraying powder vary with the milling process. The ...

Tungsten carbide (W 2 C) is composed of a tungsten and carbon black compound, six crystal, metal luster, hardness and diamond are similar, extremely difficult to melt. Tungsten carbide is a good conductor of electricity and heat, mainly used in the production of cemented carbide materials. The traditional tungsten carbide process, must be go through the production of ammonium paratungstate, tungsten powder preparation and carbonation and many other processes, the production cost is high and the process is lengthy. In order to reduce the production cost of tungsten carbide, the approach is to reduce the process from mineral raw materials to product manufacturing processes. There are many methods for the preparation of tungsten carbide. For example, high temperature melt extraction, carbonization and reduction by aluminum, tungsten carbide is directly obtained from high-purity tungsten concentrates. These methods are simple, crude and effective, but the temperature requirements ...