An Investment Model for Improving the Filling Ability of Difficult-to-Fill Superalloy Complicated Thin-walled Parts

A high-temperature alloy and mold-filling technology, applied in the direction of core, mold, mold composition, etc., can solve the problems of under-casting, cracks, and large alloy mushy area, so as to reduce under-casting and improve casting qualification rate. , the effect of reducing production costs

Active Publication Date: 2021-03-02
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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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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  • An Investment Model for Improving the Filling Ability of Difficult-to-Fill Superalloy Complicated Thin-walled Parts
  • An Investment Model for Improving the Filling Ability of Difficult-to-Fill Superalloy Complicated Thin-walled Parts
  • An Investment Model for Improving the Filling Ability of Difficult-to-Fill Superalloy Complicated Thin-walled Parts

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Embodiment Construction

[0026] All directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship between the components in a certain posture (as shown in the accompanying drawings) , sports conditions, etc., if the specific posture changes, the directional indication also changes accordingly.

[0027] Such as Figure 1~2 As shown, it is a difficult-to-fill superalloy complex thin-walled part involved in the present invention. The outline size is 200.5mm×100mm. The thickness of the bottom plate is divided into left and right ends. 0.8mm. In the middle is a load-bearing main rib with a thickness of about 0.6mm to 1.0mm, and the overall structure is a criss-cross rib with a thickness of 0.6mm to 1mm. For the complex thin-walled part of the difficult-to-fill superalloy, the following investment model is designed:

[0028] Such as image 3 As shown, an investment mold to improve the fill...

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Abstract

The invention relates to an investment mold for improving the filling capacity of difficult-to-fill superalloy complex thin-walled parts. Specifically, the investment mold has a symmetrical structure, including a runner system and subsidies; the subsidies are open on one side and closed on the other. state, and the bottom is intersected with the bottom plate of the casting, the subsidy includes subsidy a designed along the edge of the casting along with the shape of the casting and subsidy b designed along the symmetrical center of the casting, subsidy a and subsidy b are flush in height, and the subsidy is consistent with the casting wax The mold is integrally formed; the sprue system is provided with a sprue cup, and the sprue cup is connected with a main sprue, and the main sprue includes a sprue, a plurality of runners and a plurality of wedge-shaped risers c, a plurality of Wedge riser d; each runner is provided with a wedge riser e or a boot-shaped riser, and the wedge-shaped riser c, wedge-shaped riser d, wedge-shaped riser e, and boot-shaped riser are all connected to the subsidy superior. The invention effectively reduces the occurrence probability of under-casting, cracks and loosening of the product, and improves the qualified casting rate of the product.

Description

technical field [0001] The invention relates to a precision casting technology for a thin-walled part of an aero-engine vector exhaust nozzle, in particular to an investment mold for improving the filling ability of a difficult-to-fill superalloy complex thin-walled part. Background technique [0002] A certain type of aero-engine tail nozzle is a large thin-walled part of JG4246A / K424 alloy. The special requirements for high-temperature load bearing and ablation resistance of thin-walled parts of the model vector tail nozzle. However, its structure has the characteristics of large length, thin wall, multiple ribs, and partial thickness; the maximum length is 600mm, the thinnest bottom plate is 0.6mm, and the length-to-thickness ratio reaches 1000:1. 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C7/02B22C9/08B22C9/22
CPCB22C7/02B22C9/082B22C9/088B22C9/22
Inventor 孙长波李同同周君华王健楠尚伟
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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