Casting process of turbine blade for gas turbine
A technology for turbine blades and gas turbines, applied in the field of precision casting, can solve problems such as difficulty in meeting standards and control of the defect size of turbine blades of gas turbines, and achieve the effect of improving production efficiency
Active Publication Date: 2020-11-17
沈阳中科三耐新材料股份有限公司
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Problems solved by technology
[0003] The purpose of the present invention is to provide a casting process of turbine blades for gas turbines, which can solve the problems of the defects and size control of gas turbine blades that are difficult to meet the standards
Method used
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Embodiment 1
[0019] This embodiment is a casting process for the third-stage turbine rotor blade of a gas turbine, and the specific steps are:
[0020] (1) Turbine blade wax mold preparation: select medium-temperature wax material, and use injection molding to press the blade wax and pouring system. The pressing process parameters of the blade wax parts are: mold material temperature is 65°C±2°C, injection temperature is 69°C±2°C, injection pressure is 3-4MPa, and pressure holding time is 150 seconds. Then the blade wax and pouring system according to figure 1 The way shown is assembled into a wax model. The pouring system adopts the top injection method, the tenons of the blades face upward, and a set of wax models contains 4 pieces of blades.
[0021] (2) Formwork preparation: Use the formwork material to wrap the wax pattern to form a nine-layer structure formwork; wherein: the first layer is a refinement layer, and the coating used for the refinement layer is made of cobalt oxide pow...
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Abstract
The invention discloses a casting technology for turbine blades for a gas turbine, and belongs to the technical field of precise casting. The casting technology comprises the steps that a turbine blade wax mould is prepared; a mould shell is prepared; the mould shell is pre-roasted, specifically, the roasting temperature is 1010-1030 DEG C, and the heat preservation time is not less than six hoursafter the mould shell is put into a furnace to reach the temperature; alloy pouring is conducted, specifically, the alloy refining temperature is 1590-1610 DEG C, the refining time is not less than ten minutes, then alloy liquid is poured into the pre-roasted mould shell, the pouring time is 2-3 seconds, and thus a casting of the turbine blades for the gas turbine is obtained. By setting a reasonable wax mould and mould shell preparation technology and a pouring technology, the produced blades meet the index requirements in all aspects of grain size, defect and size control, and the advancedlevel of the same product abroad is achieved. According to the casting technology for the turbine blades for the gas turbine, the four blades are cast in each set, the length of the blades is greaterthan 300 mm, the production efficiency is greatly improved, and batch production of the blades is achieved.
Description
technical field [0001] The invention relates to the technical field of precision casting, in particular to a casting process of a turbine blade for a gas turbine. Background technique [0002] Gas turbines are major core equipment and are widely used in industries and ships. Turbine blades are the key hot-end components of gas turbines, and their size is much larger than that of aero-engine turbine blades, making them more difficult to prepare. The core technology of gas turbine blade manufacturing has been monopolized by foreign developed countries (the United States, Britain, Japan, etc.), and the country has long relied on imports. Being controlled by others in terms of key technologies is not conducive to the rapid development of my country's gas turbine industry. Therefore, it is of great significance for my country's gas turbine industry to break through the key technology of gas turbine blade preparation and form the mass production of turbine blades. Contents of ...
Claims
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IPC IPC(8): B22C9/04B22C7/02B22C9/20B22C3/00
CPCB22C3/00B22C7/02B22C9/04B22C9/20
Inventor 楼琅洪洪博任建军苗卿
Owner 沈阳中科三耐新材料股份有限公司