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A Casting Method of Single Crystal Superalloy Blade with Precise Control of Three-dimensional Crystal Orientation

A technology of crystal orientation and high temperature alloy, applied in the field of precision casting, can solve the problems of uncontrollable secondary crystallographic orientation, single crystal blade performance and qualification rate cannot be in line with international standards, etc.

Active Publication Date: 2020-10-27
ANHUI YINGLIU HANGYUAN POWER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, at present, the single crystal castings of domestic production units are all produced by the crystal selection method, and the scrap rate due to a crystal orientation deviation is between 8% and 20%. The resulting scrap rate can reach 2%-3%, and the secondary crystallization orientation is uncontrollable, resulting in the performance and pass rate of domestically produced single crystal blades unable to meet international standards, becoming a bottleneck

Method used

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  • A Casting Method of Single Crystal Superalloy Blade with Precise Control of Three-dimensional Crystal Orientation
  • A Casting Method of Single Crystal Superalloy Blade with Precise Control of Three-dimensional Crystal Orientation
  • A Casting Method of Single Crystal Superalloy Blade with Precise Control of Three-dimensional Crystal Orientation

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Experimental program
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Embodiment 1

[0035] Casting technical scheme design:

[0036] Single crystal turbine blades such as image 3 As shown, it specifically includes blade body 1, inner side of mounting plate 2, extension section 3, tenon 4, thimble boss 5 and sealing plate 6.

[0037] The precision casting method is to manufacture a set of precision casting modules, such as Figure 4 , the investment casting module includes a formwork and a chassis 12 arranged in sequence from top to bottom, the formwork includes a sprue cup 7, a subgroup tree structure 8, a gating system 9, a pillar 13 and an upper sprue 15, and the sprue cup 7. The upper runner 15 and the gating system 9 can be designed according to the specific size, weight and geometric shape of the blade. The subgroup tree structure 8 consists of three parts: the blade 14, the single crystal movable blade selector 10, and the seed crystal segment 11. In the wax module combination stage, the seed crystal segment 11 is directly inserted into the positioni...

Embodiment 2

[0055] Casting technical scheme design:

[0056] Single crystal turbine blades such as image 3 As shown, it specifically includes blade body 1, inner side of mounting plate 2, extension section 3, tenon 4, thimble boss 5 and sealing plate 6.

[0057] The precision casting method is to manufacture a set of precision casting modules, which include a mold shell and a chassis 12 arranged in sequence from top to bottom, and the mold shell includes a sprue cup 7, a subgroup tree structure 8, and a gating system 9 , pillar 13 and upper runner 15, sprue cup 7, upper runner 15 and gating system 9 can be designed according to the specific size, weight and geometric shape of the blade. The subgroup tree structure 8 consists of three parts: the blade 14, the single crystal movable blade selector 10, and the seed crystal segment 11. In the wax module combination stage, the seed crystal segment 11 is directly inserted into the positioning groove of the single crystal movable blade selecto...

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Abstract

The invention discloses a casting method of a single-crystal superalloy blade capable of finely controlling three-dimensional crystal orientation. The method includes manufacturing a set of precision casting modules, preparing a nickel-based superalloy seed segment, pressing wax, the seed segment and a wax mold Assembling, mold shell preparation, and casting, the method provided by the invention can not only accurately control the primary crystal orientation of the crystal within 5°, but also can control the secondary crystal orientation within 5° to obtain high-precision three-dimensional crystal orientation requirements, thereby greatly Improve the service performance and mass production pass rate of single crystal turbine blades.

Description

technical field [0001] The invention relates to the technical field of precision casting, in particular to a casting method of a single-crystal superalloy blade capable of precisely controlling three-dimensional crystal orientation. Background technique [0002] Aeroengines are recognized as the most difficult mechanical equipment to manufacture in the world, also known as the "crown of manufacturing industry". Turbine blades are one of the core components of aero-engines. They have to work in high-temperature, high-speed, and high-stress environments. Their structures are complex, difficult to manufacture, and high in added value. It is "the jewel in the crown of the manufacturing industry". But it is worth noting that: 1. Single crystal parts have obvious anisotropy, and the performance is the best when the <001> crystallographic orientation is parallel to the stress direction in service. Therefore, it is generally required that the angle between the stress directi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/22B22C9/04B22D27/04
CPCB22C9/04B22D27/045C30B11/00C30B29/52
Inventor 戴勇杜应流葛丙明程干冯文刚施长坤陶元亮苏鸿
Owner ANHUI YINGLIU HANGYUAN POWER TECH CO LTD
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