Method for preventing mixed crystals from being generated at free end of conjoined single crystal guide blade core

A technology of guide vane and free end, which is applied in the field of preventing miscellaneous crystals at the free end of the conjoined single crystal guide vane core, can solve the problems of edge plate miscellaneous crystals, etc., and achieve the effect of easy trimming, simple trimming operation, and easy drying of castings

Active Publication Date: 2022-01-28
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a method for preventing miscellaneous crystals at the free end of the core of the conjoined single crystal guide vane, solves the problem of miscellaneous crystals on the edge plate caused by coating the free end of the core of the conjoined single crystal guide vane with wax, and improves the quality of the conjoined single crystal. Qualification rate of guide vane preparation

Method used

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  • Method for preventing mixed crystals from being generated at free end of conjoined single crystal guide blade core
  • Method for preventing mixed crystals from being generated at free end of conjoined single crystal guide blade core
  • Method for preventing mixed crystals from being generated at free end of conjoined single crystal guide blade core

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Embodiment Construction

[0015] Such as Figure 1-3 As shown, a method for preventing stray crystals at the free end of the conjoined single-crystal guide vane core comprises the following steps:

[0016] Step 1. Both the free end 7 and the fixed end 8 of the core are of cuboid structure, the side of the small edge plate 3 of the blade is the free end 7 of the core, the side of the large edge plate 4 of the blade is the fixed end 8 of the core, and the fixed end 8 of the core is Groove 10 is provided; the size of the rectangular cross-section of the fixed end 8 of the core is set according to the cross-section size of the outlet of the first inner cavity 5 of the blade body and the second inner cavity 6 of the blade body, and is fixed by the core It is advisable that the rectangular cross-section of the end 8 is inscribed in the cross-section of the inner cavity outlet on one side of the large edge plate 4 of the blade. The fixed end 8 of the core protrudes from the blade body and the length is 30-40m...

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Abstract

The invention belongs to the field of investment casting of single-crystal blades, and particularly relates to a method for preventing mixed crystals from being generated at the free end of a conjoined single-crystal guide blade mold core. According to the technical scheme, in the wax mold preparation process, a seeding triangular wax sheet patch is arranged at the free end of the mold core, and an alloy liquid runner between the free end of the mold core and the side end face of a blade small margin plate is formed after dewaxing. According to the method for preventing mixed crystals from being generated at the free end of the conjoined single crystal guide blade core, the problem of mixed crystals on an edge plate caused by coating of the free end of the wax brushing core of the conjoined single crystal guide blade is solved, and the yield of conjoined single crystal guide blade preparation is increased.

Description

technical field [0001] The invention belongs to the field of investment casting single-crystal blades, and in particular relates to a method for preventing the generation of miscellaneous crystals at the free end of the core of conjoined single-crystal guide blades. Background technique [0002] Most of the conjoined single crystal guide blades used in aero-engines are I-shaped structures with a certain angle between the blade body and the edge plate. At present, the manufacturing process of conjoined single crystal guide vanes mainly adopts investment casting, which is what we usually call the lost wax method. Paint and sand are applied to the module formed by the blade wax model, and the shell is formed after drying and hardening. After dewaxing and roasting, a ceramic shell in the shape of the blade cavity is formed, and after pouring the alloy liquid, the conjoined single crystal guide blade is formed by directional crystal pulling. The airfoil internal cavity of the ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C7/02B22C9/04B22C9/22C30B15/00C30B29/52
CPCB22C7/02B22C9/043B22C9/22C30B15/00C30B29/52
Inventor 尚伟于海涛王丹姜铸航柳乐
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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