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Cobalt Based Powder

Cobalt base alloys typically contain tungsten and carbon for strengthening. Carbon has low solid solubility in cobalt and therefore, most of it partitions in WC, W2C and M6C or other carbides. These hard phases have a strengthening effect, making such alloys maintain high hardness and strength at temperatures under 800℃. The cobalt-chromium-tungsten-carbon alloys generally have excellent properties to resist high temperature wear, oxidation and thermal fatigue.

Cobalt has a hexagonal-close-packed (hcp) crystal structure at temperatures below 417℃. Intrinsically, it has low coefficient of friction resulting in excellent wear resistance. At temperatures above 417℃, cobalt transforms from hcp to fcc (face-centered-cubic) crystal structure, thereby, generating thermal stresses. Therefore, it is recommended that in weld overlaying and spraying, the parts being coated are pre-heated to 500-600℃ to avoid cracking in the coating or overlay.

Co-Cr-W

Co-Cr-Mo

Cobalt Based Powder Containing B

Cobalt PTA Powder

Cobalt HOVF Powder

SCobalt Laser Cladding Powder

Laser Cladding Alloy Powder

With the significant advances made in laser technology, laser cladding has gained increasing acceptance. Compared to the traditional overlaying processes, it has the advantage of low distortion, low dilution, near net shape after cladding, and fine micro-structure for superior properties. However, because of concentration of heat, it could cause stress cracking. Based on our understanding of the laser cladding process, we had developed a family of powders especially for laser cladding. Our customers have endorsed them unanimously.

Centrifugal Casting Alloy Powder

Due to the development of fiber-reinforced plastics, inorganic fillers are increasingly used in making halogen-free plastics. Making such plastics demands superior properties to resist wear and corrosion on the extruder components, especially, extruder screws and barrels. As a result, bi-metallic barrels are increasingly used. To satisfy both the demanding requirements on the properties of the interior barrel surface and the centrifugal casting process, the company has developed a series of powders to meet the challenge. These powders are iron, nickel, cobalt base alloys as well as Ni+WC. We are the only domestic supplier of gas-atomized powders for centrifugal casting. Their low melting points, low oxygen and impurities result in porosity-free, fine-grained structures with superior wear and corrosion resistance.