Casting system for large-scale thin-walled high-temperature alloy casting

A high-temperature alloy and pouring system technology, applied in the direction of casting mold, core, casting mold composition, etc., can solve problems such as undercasting, cracks, and large range of alloy mushy areas, so as to prevent undercasting, improve casting pass rate, The effect of preventing porosity

Active Publication Date: 2020-02-11
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Moreover, the alloy has a large range of mushy regions, and metallurgical defects such as undercasting, cracks, and porosity are easily produced during investment casting.

Method used

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  • Casting system for large-scale thin-walled high-temperature alloy casting
  • Casting system for large-scale thin-walled high-temperature alloy casting
  • Casting system for large-scale thin-walled high-temperature alloy casting

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Embodiment Construction

[0028] Such as Figure 5-6 As shown, the outline size of a large thin-walled superalloy casting is 500.5mm×100mm. The thickness of the bottom plate is divided into front and rear ends. The thickness of the front bottom plate is 0.6 mm to 0.8 mm, and the thickness of the rear bottom plate is 0.8 mm to 1 mm. In the middle is a load-bearing main rib with a thickness of about 2.5mm to 3.8mm, and two pin seats are installed in the distribution. The overall structure is that the ribs are criss-crossed and the thickness is 1.5mm~3mm. The bottom plate in the front arc area is flat, the middle of the rest is flat, and the two sides are overlapping surfaces at a certain angle. The specific gating system design is carried out based on this casting as an example.

[0029] Such as Figure 1~4 As shown, a large-scale thin-wall superalloy casting gating system includes a casting 1 and a runner 2. The casting 1 is symmetrically arranged on both sides of the runner 2, forming a two-piece st...

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Abstract

The invention relates to the technical field of precision casting of large-scale thin-walled parts for jet nozzles of aero-engines, in particular to a casting system for a large-scale thin-walled high-temperature alloy casting. According to the specific technical solution, the casting system comprises castings and a pouring gate and is a group of two-piece structures; each casting comprises an ingate formed with the shape, two cylindrical bosses and multiple inner feeder heads; the ingate, the inner feeder heads and the casting are integrally formed; a sprue of the ingate, the cylindrical bosses and the inner feeder heads are flush in the height direction; the pouring gate is provided with a sprue cup, an exhaust passage, a main pouring gate, a transverse pouring gate, a molding pouring gate and two overlap joint wedge-shaped feeder heads; a truncated cone-shaped feeder head or a big wedge-shaped feeder head is arranged at the middle position of the transverse pouring gate; and multiple small wedge-shaped feeder heads are arranged on the molding pouring gate. The casting system effectively reduces the risk of generating metallurgical defects such as incomplete pouring, cracks and looseness, and improves the casting qualification rate of the casting product and the metallurgical quality.

Description

technical field [0001] The invention relates to the technical field of precision casting of a large thin-walled part of an aircraft engine tail nozzle, in particular to a pouring system for a large thin-walled superalloy casting. Background technique [0002] The bottom plate of a certain type of aero-engine expansion seal is a large thin-walled JG4246A alloy. Its structure has the characteristics of large length, thin wall, multiple ribs, and thick parts; The thickness ratio reaches 505:1. Moreover, the alloy has a large range of mushy regions, and metallurgical defects such as under-casting, cracks, and porosity are easily produced during the investment casting process. Contents of the invention [0003] The invention provides a pouring system for large thin-wall superalloy castings, which can effectively reduce the risk of metallurgical defects such as undercasting, cracks and looseness, and improve the casting pass rate and metallurgical quality of casting products. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/22B22C9/08
CPCB22C9/082B22C9/088B22C9/22
Inventor 孙长波顾欣李婧潘波涛尚伟
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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