High-strength ceramic initial segment and manufacturing method thereof

A production method and technology of the initial section, applied in the field of investment casting, to achieve the effect of improving the pass rate and good surface quality

Active Publication Date: 2016-03-23
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the present invention provides a high-strength ceramic starting section with high strength, which can support the weight of parts, and which will not cause problems such as shell cracks and the like in the molding process, and its manufacturing method

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  • High-strength ceramic initial segment and manufacturing method thereof
  • High-strength ceramic initial segment and manufacturing method thereof
  • High-strength ceramic initial segment and manufacturing method thereof

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Embodiment Construction

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0025] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relationship between the components in a certain posture (as shown in the accompanying drawings). Relative positional relationship, movement conditions, etc., if the specific posture changes, the directional indication will also change accordingly.

[0026] In addition, the ...

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Abstract

The invention discloses a high-strength ceramic initial segment and a manufacturing method thereof. The high-strength ceramic initial segment comprises a ceramic body. An initial segment inner cavity is formed in the ceramic body. The initial segment inner cavity comprises a cylindrical cavity body, a transition cavity body and a spiral cavity body, wherein the spiral cavity body is connected to the cylindrical cavity body and located over the cylindrical cavity body, and the transition cavity body is formed in the upper end of the spiral cavity body. The manufacturing method comprises the steps that firstly, an initial segment inner core is manufactured by means of high polymer materials through pressing; secondly, the initial segment inner core is placed into an external contour mold, so that the ceramic body is formed through pressing; and finally, the initial segment inner core is decomposed, and the ceramic initial segment is formed. It is guaranteed that the ceramic initial segment has sufficient strength to bear the weight of a part. Meanwhile, by the adoption of the method, a series of problems that a shell cracks and stray crystals are generated during pouring in the wax mold combining and shell manufacturing processes due to the breakage of the initial segment can be solved, the surface quality of the shell is good, and the qualified rate of single-crystal parts is increased.

Description

technical field [0001] The invention relates to the technical field of investment casting, in particular to a method for manufacturing a high-strength ceramic starting section. Background technique [0002] At present, the most commonly used starting section for manufacturing single crystals is composed of a cylindrical section and a helical section, which are usually pressed with low-temperature wax. The helical section has low strength and is easy to break. After being combined into a module, the initial section bears the entire weight of the part. Easy to deform, break or produce cracks that are not easy to find. In addition, in the process of shell making, the wax mold needs to be rotated, and it will be subjected to a large buoyancy force when immersed in the slurry. The initial section cannot withstand such a large buoyancy force, resulting in breakage, so the quality of the surface layer of the shell cannot be guaranteed. There are many problems with exposed steel at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04
CPCB22C9/04
Inventor 杜洪强张泽海潘国志孙宝才张玲
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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