Stellite Alloy Jet Engine Turbine Components

Tungsten-chrome-cobalt alloy is a cobalt-based superalloy with two main combinations: one is the tungsten group composed of Co-Cr-W-C, and the other is the molybdenum group containing Co-Cr-Mo-C. The following are the excellent performance and manufacturing process advantages of tungsten-chrome-cobalt jet engine turbine parts.

Excellent performance:
Corrosion resistance, oxidation resistance and wear resistance: Tungstin-chrome-cobalt alloy has excellent corrosion resistance, oxidation resistance and wear resistance, and can work stably in high temperature, high pressure and corrosive environment for a long time. This enables stellite jet engine turbine components to withstand high temperature gas and corrosive gases in the combustion chamber, extending their service life.
Heat resistance: The alloy can be made into components that work well in highly corrosive environments and maintain these superior properties at high temperatures, widely used in oil and gas automotive, nuclear power, paper and pulp, chemical and petrochemical, refinery, automotive, aerospace and aviation industries.

Low permeability: Due to its non-magnetic properties, anti-corrosion, and non-reactivity to human body fluids, tungstin-cobalt alloys are used in medical fields such as medical surgery, surgical tools, dental and bone implants and substitutes, heart valves, and cardiac pace-makers.

Advantages of manufacturing process:
Investment precision casting: at present, it is the best means for turbine blade manufacturing. Its technological process mainly includes the design and manufacture of core mold, pressing core, design and manufacture of wax mold, assembly and wax injection, pulp coating shell, drying shell, dewaxing, sintering, metal pouring, shell and core stripping, laser drilling and so on.

Core manufacturing: The first step is to make the ceramic core mold. The preparation of the ceramic core includes the preparation of slurry, the pressing of the core, the repair of the core element, sintering, strengthening, and the process quality control and inspection, etc. The factors that determine the performance of slurry include the composition and particle shape of ceramic powder, the composition and property of plasticizer, the proportion of powder and plasticizer, etc. The quality of ceramic core depends on the pressing quality of the blank embryo, and the pressing pressure, mode-locking pressure, slurry temperature and holding time are the main reasons affecting the pressing quality.

Wax mold manufacturing: when the wax mold is pressed, the ceramic core is put into the wax mold and positioned by the positioning element. In production, the paste mold material is mostly pressed into the pressing mold by pressure to make the investment mold. The thinner the parting agent is, the better it is, so that the investment can better copy the surface of the press and improve the surface finish of the investment. Mold pressing temperature, pressure injection pressure, holding time, pressure temperature, and mold force, type and dosage of parting agent, as well as mold making and storage of investment environment will affect the quality of wax mold.

Investment casting: the first is the assembly of investment, the formation of casting investment and the formation of pouring riser system investment together, mainly using the welding method, with a thin plate of iron, the connection part of the investment melting, so that the investment welding together. After a number of coating, hanging sand, drying hardening, sealing reinforcement, dewaxing, roasting finally made of shell.
To sum up, the excellent performance of stellite jet engine turbine parts and the advantages of manufacturing technology make the parts widely used in the aerospace field.

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