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Casting method of single-crystal high-temperature alloy blade capable of precisely controlling three-dimensional crystal orientation

A technology of crystal orientation and superalloy, which is applied in the field of precision casting, can solve the problems that the secondary crystal orientation cannot be controlled, and the performance and pass rate of single crystal blades cannot be in line with international standards, so as to achieve the effect of good crystal orientation and good integrity

Active Publication Date: 2019-03-26
安徽应流航源动力科技有限公司
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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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  • Casting method of single-crystal high-temperature alloy blade capable of precisely controlling three-dimensional crystal orientation
  • Casting method of single-crystal high-temperature alloy blade capable of precisely controlling three-dimensional crystal orientation
  • Casting method of single-crystal high-temperature alloy blade capable of precisely controlling three-dimensional crystal orientation

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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 high-temperature alloy blade capable of precisely controlling three-dimensional crystal orientation. The method includes the steps of manufacturing of a set of precise casting module, preparation of a nickel-based high-temperature alloy seed crystal section, wax pressing, combination of the seed crystal section and a wax mold, preparation of a mold shell, and casting. By means of the method, primary crystallization orientation of crystals can be precisely controlled within 5 degrees, secondary crystallization orientation can be controlled within 5 degrees, high-precision three-dimensional crystal orientation requirements are met, then the service performance of the single-crystal turbine blade is greatly improved, and the batched-production percent of pass of the single-crystal turbine blade is greatly increased.

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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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 安徽应流航源动力科技有限公司
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