Fired mold capable of improving mold-filling capacity of complicated thin-walled part of hard-mold-filling-type high temperature alloy

A high-temperature alloy and mold filling technology, which is applied in the direction of mold, core, mold composition, etc., can solve problems such as under-casting, cracks, and a large range of alloy mushy areas, so as to reduce under-casting and improve casting pass rate , The effect of saving master alloy materials

Active Publication Date: 2020-01-31
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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  • Fired mold capable of improving mold-filling capacity of complicated thin-walled part of hard-mold-filling-type high temperature alloy
  • Fired mold capable of improving mold-filling capacity of complicated thin-walled part of hard-mold-filling-type high temperature alloy
  • Fired mold capable of improving mold-filling capacity of complicated thin-walled part of hard-mold-filling-type high temperature alloy

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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 a fired mold capable of improving the mold-filling capacity of a complicated thin-walled part of hard-mold-filling-type high temperature alloy. Specifically, the fired mold isof a symmetric structure and comprises a pouring gate system and a patch; one side of the patch is opened, the other side of the patch is closed, the bottom of the patch is communicated with a casting bottom plate, the patch comprises a patch a which is designed according to the shape of a casting along the edge of the casting and a patch b which is designed along the symmetry center of the casting, the patch a and the patch b are flush with each other in height, and the patch and a casting wax mold are integrally formed; the pouring gate system is provided with a pouring cup, a main pouringgate is connected to the pouring cup, and comprises a straight pouring gate, a plurality of transverse pouring gates, and a plurality of wedge-shaped dead heads c, and a plurality of wedge-shaped deadheads d, each transverse pouring gate is provided with a wedge-shaped dead head e or a boot-shaped dead head, and the wedge-shaped dead heads c, the wedge-shaped dead heads d, the wedge-shaped dead heads e and the boot-shaped dead heads are all connected to the patch. By means of the fired mold, the occurrence probability of sufficient casting, cracking and loosening of the product is effectivelyreduced, and the casting percent of pass of the product is increased.

Description

technical field [0001] The invention relates to the precision casting technology related to the thin-walled parts of the vector tail nozzle of the aero-engine, in particular to an investment mold for improving the filling ability of the complex thin-walled parts of difficult-to-fill superalloys 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 i...

Claims

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Application Information

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Patent Type & Authority Applications(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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