scholarly journals Limitations to investment casting process in production of big aircraft turbine blades

Mechanik ◽  
2015 ◽  
pp. 50-52
Author(s):  
Jacek Nawrocki ◽  
Rafał Cygan ◽  
Krzysztof Kubiak
Keyword(s):  
Investment Casting ◽  
Turbine Blades ◽  
Casting Process ◽  
Investment Casting Process

scholarly journals CERAMIC CORES FOR TURBINE BLADES : A TOOLING PERSPECTIVE

2013 ◽  
pp. 93-99
Author(s):  
PRADYUMNA R ◽  
BAIG M A H
Keyword(s):  
Investment Casting ◽  
Turbine Blades ◽  
Casting Process ◽  
Ceramic Core ◽  
Pin Fin ◽  
Investment Cast ◽  
Investment Casting Process ◽  
Forced Cooling ◽  
Super Alloy ◽  
Ceramic Mix

Blade/vane components used in aerospace turbines are of twisted aerofoil shape, made by the process of investment casting, using Ni based super-alloy materials. These castings operate at turbine inlet temperatures (TET) close to the melting point of the alloy, in order to maximize thermal efficiency and thrust of the engine. The castings are made hollow, with intricate features such as turbulator, pin-fin, etc built-in to maximize the effect of heat transfer during forced cooling through internal passages. The hollow geometry in the castings is produced during the investment casting process by using a suitable ceramic core made from Silica or Alumina based mixes. These ceramic cores are high pressure injected by forcing the ceramic mix into dedicated molds or dies. Development of such dies is an involved process by itself, addressing issues right from ceramic mix behavior to manufacturability of the injection mould. The present paper attempts to highlight issues related to tooling development for ceramic cores used in investment cast turbine blade/vane components.

scholarly journals Design and Simulation on Investment Casting Mold for Metal Matrix Composite Material

2011 ◽  
Vol 66-68 ◽  
pp. 1676-1681 ◽  
Author(s):  
Taufik ◽  
Shamsuddin Sulaiman ◽  
B.T. Hang Tuah Baharudin ◽  
M.K.A.M. Arifin ◽  
Arep Ariff Hambali
Keyword(s):  
Composite Material ◽  
Investment Casting ◽  
Metal Matrix ◽  
Casting Process ◽  
Mold Design ◽  
Casting Mold ◽  
Compressor Impeller ◽  
Investment Casting Process ◽  
Temperature And Pressure ◽  
Metal Matrix Composite Material

This paper presents the design and simulation on investment casting mold for metal matrix composite material. The study was investigating the design parameters for the casting mold and simulated the temperature and pressure on the mold. Compressor impeller selected as the product of the study. Among the various types of casting techniques, investment casting process is the most suitable process to produce the compressor impeller. The alternative design of casting mold of investment casting was generated using CAD software. Concept scoring was prepared to select the suitable design for the investment casting process. Material selection of compressor is Aluminum Silicon Carbide. Stainless steel AISI H13 is selected as the material for the mold. The parameter for the mold design is included branch, gating, sprue and runner. The analysis was presented to the mold by using ANSYS simulation tool to determine the temperature and pressure of the mold. In addition, three case studies were presented and compared the static pressure in different velocity and temperature of the mold design. The result showed the runner and the branch size were important to produce the molten metal flow into the mold pattern. As a result, the design of investment casting mold was proposed.

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