In recent years, the research of the tungsten carbide cobalt thermal spraying with nanostructure coatings become the new trend. as a wear resistant coating, due to its good the hardness and toughness, it is widely used in aerospace, metallurgy, machinery fields. Relative to the hard chromium plating, thermal spraying tungsten carbide cobalt ceramic coating have obvious advantages on abrasion resistance, corrosion resistance, fatigue resistance, what’s more, it have fast preparation speed, low cost, good environment. in some application areas, such as aircraft landing gear, the thermal spraying WC2CoCr coating is replacing hard chrome plating.
Nano structure tungsten carbide cobalt thermal spraying powders preparation from Hongwu nanometer:
1. the precursor solution preparation with soluble salt containing tungsten, cobalt mixing chemical composition.mix them evenly, spray drying, roasting, reduction and carbonization.getting Nanocrystalline WC-Co composite powders;
2. nano structured WC-Co composite powders composition can be adjusted according to the using needs,such as adding some other alloying elements growth inhibitor, and the elements content can be accurately controlled.
3. nano WC-Co composite powders, grain size of WC phase is 60nm with low content of impurities.
4. product technology processes mature sound, own a full set of equipment, low cost, large output, high cost performance.
WC-CO nanoparticles introduction form Hongwu nanometer
1. Particle size:60nm
2. Purity:>99%
3.High hardness
4.High-wearing
5.Ratio: WC:Co=88:12/90:10/94:6, namely, WC-12CO,WC-10CO,WC-6CO
6: Property: High hardness & high-wearing–Tungsten Cobalt alloy nanoparticle have good properties of hardness, strength, high breaking and beating ductility as well as high electrical and thermal conductivity.
The phase composition of the thermal spraying wc-co powder effect on the properties of the coating
high cobalt content in the coating can increase the impact toughness of the coating, its bond strength is also good, and not easy to decarburization, able to work under high temperature without lubrication conditions, and have high abrasion resistance and corrosion resistance.The explosion spraying high cobalt content of cobalt coating tungsten carbide (WC225 % Co) coating applied to aeroengine nozzle, can work long-term reliably under 500 ℃.
Clients application case 1
Low temperature supersonic spraying technology, adopting nano structured WC-Co alloy strengthening coating layer surface, it is not only wear-resistant, corrosion-resistant, but surface smooth level off, structure Compact, high bonding strength with matrix.
Clients application case 2
Nano WC-Co composite powders is successfully used in microbit of PCB, and wear experiments show that the wear rate with the nanometer WC-Co composite powder is lower 30-40% than the standard microcrystalline drilling bit, its life span is about 2.9 times that of the standard drill.
Tungsten is main raw materials preparation nanometer WC-Co composite powders, in the world only China tungsten resource is rich, about 52% of the world’s total reserves, this is the most advantageous conditions to our company research for researching and development nanometer WC-Co composite powders and alloy. All in all, nanometer WC-Co composite powder has immeasurable potential market.