Preparation method of ceramic shell for casting blade of gas turbine
A gas turbine blade and ceramic type technology, which is applied in the direction of casting molding equipment, casting mold, casting mold composition, etc., can solve the problems of blade casting deformation, casting deformation, blade qualification rate difficult to improve, etc.
Inactive Publication Date: 2016-08-17
DONGFANG TURBINE CO LTD
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Problems solved by technology
[0002] In the precision casting of high-temperature alloy solid blades, the most difficult problem to solve is the deformation of blade casting, which directly leads to the difficulty in improving the pass rate of blades
The most fundamental reason for the casting deformation of the blade is the uneven cooling of the blade after the molten steel is poured. The uneven cooling of the blade causes the uneven distribution of thermal stress and finally causes the deformation of the casting.
Method used
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[0034] In order to describe the technical features and functions of the present invention in detail and realize them according to the content of this specification, the implementation of the present invention will be further described below in conjunction with the accompanying drawings.
[0035] A kind of preparation method of casting gas turbine blade ceramic shell of the present invention comprises the following steps:
[0036] S1, preparing a ceramic shell 3 with a predetermined thickness. Before preparing the ceramic shell with predetermined thickness, the sprue cup wax mold 1 and the blade wax mold 2 that will be pressed are assembled together by welding, such as figure 1 , 2 The structure presented. In this embodiment, the predetermined thickness of the ceramic shell 3 is half the thickness of the ceramic shell product. It can be understood that the predetermined thickness is not limited to half the thickness of the ceramic shell product, and can also be other appropri...
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The invention discloses a preparation method of a ceramic shell for casting a blade of a gas turbine. The preparation method comprises the following steps of S1, preparing a ceramic shell with preset thickness; S2, fixing at least one mending and filling piece made of a meltable material or a soluble material along the outer wall of the ceramic shell which is prepared in the step S1 and corresponds to the length direction of an exhaust edge part of the blade of the gas turbine; S3, further preparing at least one layer of ceramic shell outside the ceramic shell prepared in the step S2 by using a slurry staining and sand spraying method, and sealing slurry to obtain a ceramic shell product; and S4, removing the mending and filling piece in the ceramic shell product to obtain the ceramic shell for casting the blade of the gas turbine. By using the ceramic shell, the deformation of the cast blade of the gas turbine can be reduced.
Description
technical field [0001] The invention relates to the preparation technology of a ceramic mold shell, in particular to a preparation method of a ceramic mold shell for casting gas turbine blades. Background technique [0002] In the precision casting of superalloy solid blades, the most difficult problem to solve is the deformation of blade casting, which directly leads to the difficulty in improving the qualified rate of blades. The most fundamental reason for casting deformation of the blade is the uneven cooling of the blade after the molten steel is poured. The uneven cooling of the blade causes the uneven distribution of thermal stress and finally causes the deformation of the casting. [0003] Therefore, it is desired to seek a technical solution to at least alleviate the above-mentioned problems. Contents of the invention [0004] The technical problem to be solved by the present invention is to provide a method for preparing a ceramic shell for casting a gas turbine...
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IPC IPC(8): B22C9/04B22C9/22
CPCB22C9/04B22C9/22
Inventor 赵代银曾洪杨功显杨照宏张松泉何建伍林
Owner DONGFANG TURBINE CO LTD