laser cladding powder

2 week ago

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5 year

Product details

GP18NR, THERMAL SPRAY POWDER, HVOF POWDER, COATING SERVICE

Thermal sprayed WC cermet coatings have been used to resist wear environments at ambient and elevated temperatures for a number of years due to their properties such as high abrasion, sliding and erosion resistance, advantages offered by dense coatings. High velocity oxygen fuel (HVOF) thermal spraying is suitable in obtaining dense cermet coatings with low oxidation due to its unique advantage of heating the feedstock to near or above its melting point, preferably between the solidus and liquidus temperatures, at a relatively low process temperature by a supersonic combustion gas stream. Due to high velocity, the time of interaction between the powder and the flame shortens and in conjunction with the process temperature limited thermal alteration occurs ensuring good cohesion and morphology with reduced porosity and low decarburization. An alternative to the HVOF process, for manufacturing cermet hard coatings, is the high velocity air fuel (HVAF) process which utilizes compressed air, instead of oxygen, for combustion and operates at lower temperatures than the HVOF process The HVAF process reduces the manufacturing cost of coatings, replacing pure oxygen by compressed air having as consequence coatings which do not show any of the oxidation or decarburization effects after spraying. WC and CrxCy based thermally sprayed coatings are extensively used to decrease the friction coefficient between various sliding components and to improve corrosion resistance in many industries. Due to the Cr content the coatings are suitable for high-temperature applications. The CrC–37WC–18M is quite a new powder developed to combine the properties of WC–CoCr and CrC–NiCr cermet powders. It is composed of two carbide phases WC and Cr3C2 embedded into an alloy composed of Ni, Co and a small amount of Fe. There are no studies in the literature focused on the properties of CrC–37WC–18M deposited via HVOF and HVAF processes. The aim of the study was to characterize the phase and microstructure of the CrC–37WC–18M coatings deposited by HVAF and HVOF thermal spraying as well as to study the composition, abrasive and sliding wear behaviors of the coatings.

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Luoyang Golden Egret Geotools Co., Ltd.

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5 year

Main Product: Thermal Spray Powder, Welding Material, Laser Cladding Powder , PTA Welding Powder, Shield Cutters, Metal Alloy Powder

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