Stellite alloy uses
As a special engineering material, Stellite alloy has been widely used. It has excellent performance in high temperature resistance, wear resistance, cavitation resistance, corrosion resistance, etc., but the performance of different grades of alloys is also very different, and some grades of alloys are designed for a special purpose, and they should still be carefully selected in accordance with the technical requirements to achieve the best comprehensive performance.
Stellite three alloys contain up to 25%, and the carbide content in the tissue is more than 30%. As a result, the alloy has strong wear and corrosion resistance. These three alloys also have a hardness above 52 and are difficult to machine. They are often used in casting or as hard surface materials to make coatings. Can be used for pump sleeves and rotary seal rings, wear plates, bearing sleeves and workholding fixtures for centerless grinding machines.
The hardness of Stellite alloys is higher than that of Stellite 6, and the HRC is 43 48, which has high wear resistance, but poor resistance to mechanical impact. Stellite 4 is a cast alloy that can be machined with excellent high-temperature strength. Hot pressing and hot extrusion dies for copper-based alloys and aluminum alloys. Stellite 12 is a machinable hardfacing alloy. It can be sprayed on the surface of long knife blades used in carpet, plastic, paper, chemical and other industries.
Stellite 6, 306, 506 alloys have a medium carbon content (0.).5%～1.6%), the ductility is worse than that of statellite, generally 1% at room temperature, and its hardness is also slightly higher, but the wear resistance and high temperature resistance are better. These alloys are used as coatings for castings and are also resistant to thermal shock, so they can be used as sealing surface materials for steam and chemical valves, as well as contact parts such as pliers and thermal scissors.
Stellite alloys.
Stellite alloy is a kind of cemented carbide that can withstand various types of wear and corrosion and high-temperature oxidation, which is translated into Stellite alloy in China, which is generally known as cobalt-based alloy, and Stellite alloy was invented by the American Elwood Hayness in 1907. Stellite alloys are a class of alloys that use cobalt as the primary component, containing appropriate amounts of nickel, chromium, tungsten and small amounts of molybdenum, niobium, tantalum, titanium, lanthanum and occasionally iron. Depending on the composition of the alloy, they can be made into welding wire, powder for hard surfacing welding, thermal spraying, spray welding and other processes, and can also be made into castings and forgings and powder metallurgy parts.
Shanghai Stellite Stellite1 cobalt-based electrodeD822 cobalt|ECOCR-C Cobalt-based Electrode Chemical Composition (Component %):
Functional characteristics of tellite alloys.
Generally, the cobalt-based superalloy has a low and less cohesive strengthening phase, although the strength of the medium temperature is low (only 50-75% of the nickel-based alloy), but at higher than 980, it has high strength, outstanding thermal fatigue resistance, thermal corrosion resistance and corrosion resistance, and has good weldability. It is suitable for the manufacture of guide vanes and nozzle guide vanes of aviation jet engines, industrial gas turbines, ship gas turbines, and diesel engine nozzles.