3D Printing Alloy CoCrW Powder

(3D Printing Alloy CoCrW Powder)

About 3D Printing Alloy CoCrW Powder:Cobalt-chromium-tungsten alloy (CoCrW) is one of the Stellite alloys. Stellite alloy is a hard alloy that can withstand various types of wear, corrosion and high-temperature oxidation. It is commonly referred to as a cobalt-based alloy. CoCrW can resist all kinds of wear, corrosion and oxidation at high temperatures. According to the composition of the alloy, it can be made into welding wire, used for hard surface surfacing, thermal spraying, spray welding powder. Stellite was originally a binary cobalt-chromium alloy and later developed into a ternary composition of cobalt-chromium-tungsten. Cobalt-chromium-tungsten alloy is a kind of alloy with cobalt as the main component, containing a considerable amount of chromium, tungsten and a small amount of nickel, molybdenum, silicon, carbon, niobium, tantalum and other alloying elements, and occasionally also containing iron. Unlike other high-temperature alloys, cobalt-chromium-tungsten alloys are not strengthened by an ordered precipitation phase firmly bonded to the matrix but are composed of austenite fcc matrix that has been solid-solution strengthened and a small number of carbides distributed in the matrix. However, the casting of cobalt-chromium-tungsten superalloys relies to a large extent on carbide strengthening. Pure cobalt crystals have a hexagonal close-packed (hcp) crystal structure below 417°C, which transforms to fcc at higher temperatures. In order to avoid this transformation of cobalt-chromium-tungsten superalloys in use, in fact, all cobalt-chromium-tungsten alloys are alloyed with nickel in order to stabilize the structure from room temperature to melting point temperature. The cobalt-chromium-tungsten alloy has a flat fracture stress-temperature relationship, but it shows better thermal corrosion resistance than other high temperatures above 1000°C. This may be due to the higher chromium content of the alloy. The thermal stability of carbides in cobalt-chromium-tungsten alloys is better. When the temperature rises, the growth rate of carbide accumulation is slower than the growth rate of the γ phase in the nickel-based alloy, and the temperature of re-dissolving into the matrix is also higher (up to 1100℃). Therefore, when the temperature rises, the cobalt-chromium The strength of tungsten alloys generally declines slowly. Cobalt-chromium-tungsten alloy has good thermal corrosion resistance. It is generally believed that the reason why cobalt-chromium-tungsten alloy is better than nickel-based alloy in this respect is that the melting point of cobalt sulfide (such as Co-Co4S3 eutectic, 877℃) is higher than that of nickel. The melting point of sulfide (such as Ni-Ni3S2 eutectic 645°C) is high, and the diffusion rate of sulfur in cobalt is much lower than that in nickel. And because most cobalt-chromium-tungsten alloys have higher chromium content than nickel-based alloys, a Cr2O3 protective layer that resists alkali metal sulfates (such as Na2SO4 corrosion) can be formed on the surface of the alloy. However, the oxidation resistance of cobalt-chromium-tungsten alloys is generally lower than that of nickel-based alloys. Feel free to send an inquiry to get the latest price if you would like to buy 3D Printing Alloy CoCrW Powder in bulk.Composition(percentage by mass)

Additional elements less than 1%: N, Nb

Contains no nickel, beryllium or iron

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