A Design Method of Double Oriented Hollow Blade Casting System

Abstract

The invention provides a design method of a pouring system for double directional hollow blades. Including: the combination of pouring system; the manufacture of the shell for the wax pattern module; the shell is placed in a three-chamber vacuum furnace to complete the pouring. The casting temperature is 1480°C and the crystal pulling speed is 4mm / min. Among them, the combination of the gating system specifically includes: establishing the diameter of the module chassis; determining the process extension of the blade; determining the position of the starting section on the module chassis; determining the height of the straight pipe in the module; connecting the filling path of the gating system; Set up runners connected with the straight pipe and sprue cup; connect the sprue cup above the straight pipe; through the design optimization of the combination of the gating system, the broken crystal of the columnar crystal at the exhaust side, Metallurgical defects such as oblique crystals and outcropping crystals, and effectively control the deformation of castings during pouring.

Description

Technical field [0001] The present invention belongs to the field of smelt precision casting, and more particularly to a design method of a duplex-oriented hollow blade casting system. Background technique [0002] The new generation of aerospace engine high-pressure turbine guide blades are multi-directional hollow blades of air-cooled structures, with hollow, thin-walled, complex, wider string, etc. Difficult point, while the pulse is changed with the temperature field, alloy and shell, and the unclear match shrinkage contraction of the core are large. [0003] At present, the guiding blade of the hollow gas-cold double body structure is cast in the domestic stage in China, and therefore, it can be used for less information, and the dual oriented hollow blade of the present invention is designed to ensure this type. The development of blades is of great significance to boost new engines. [0004] In the present invention, the present invention provides a design method of a cast...

AI Technical Summary

Problems solved by technology

[0004] In view of the lack of control level of the growth orientation of columnar crystals and other metallurgical problems in the existing double-connected directional hollow blade casting system, the present invention provides a design method for the pouring system, the purpose of which is to control the growth direction of the columnar crystals of the double-connected directional hollow blades, To ensure the control of the deviation and divergence of columnar crystal growth, the deviation is the angle between the growth direction of the columnar crystal and the main axis of the blade, and the divergence is the angle between the deviation of two adjacent columnar crystals, while improving the metallurgical quality of the stable blade and improving the precision casting of the blade. Pass rate

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