Casting forming process of complex high temperature alloy multi-union guide vane casting

A guide vane and casting molding technology, which is applied in the direction of casting molding equipment, casting molds, casting mold components, etc., can solve the problems of low yield and achieve the effects of reducing casting defects, strengthening molding and feeding effects, and strengthening feeding effects Effect

Active Publication Date: 2019-04-16
AEROSPACE HIWING HARBIN TITANIUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of low yield due to many casting defects inside or on the surface of castings cast by the existing casting molding process of multiple guide vanes, the present invention provides a casting molding process of complex superalloy multiple guide vanes castings, The technical scheme adopted is as follows:

Method used

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  • Casting forming process of complex high temperature alloy multi-union guide vane casting
  • Casting forming process of complex high temperature alloy multi-union guide vane casting
  • Casting forming process of complex high temperature alloy multi-union guide vane casting

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Embodiment 1

[0045] This embodiment provides a casting molding process of a complex high-temperature alloy multi-connected guide vane. The multi-connected guide vane includes a large edge plate, a small edge plate and a blade body. The process includes the following steps:

[0046] Step 1: Use a wax press to inject wax into the metal mold to prepare the casting body wax mold, and weld the casting body wax mold and the pouring system together to obtain the module;

[0047] Step 2: In a constant temperature and humidity room, coat the module with refractory paint layer by layer to prepare a molded shell; the specific requirements are shown in Table 1;

[0048] Step 3: Send the shell into the dewaxing kettle for dewaxing at a pressure of 0.4MPa~0.6MPa and a temperature of 140℃~160℃;

[0049] Step 4: Send the dewaxed shell into the roasting furnace for high-temperature pre-baking, and the high-temperature pre-baking temperature is 1050±20℃;

[0050] Step 5: After the high-temperature pre-roasting proces...

Embodiment 2

[0062] The difference between this embodiment and Embodiment 1 lies in: Step 5: The single layer thickness of the fire-resistant insulation cotton is 3 mm.

[0063] The high-temperature alloy multi-connected guide vane casting prepared in this embodiment has no obvious shrinkage, porosity, cracks and other casting defects. The overall quality is good, and the yield rate is as high as 78%, which overcomes the difficulty in controlling the processing technology of the multi-connected guide blade. There are many casting defects that lead to the problem of low yield.

Embodiment 3

[0065] The difference between this embodiment and Embodiment 1 lies in: Step 5: The thickness of a single layer of the fire-resistant insulation cotton is 10 mm.

[0066] The high-temperature alloy multi-connected guide blade castings prepared in this embodiment have no obvious shrinkage, porosity, cracks and other casting defects. The overall quality is good, and the yield rate is as high as 75%, which overcomes the difficulty of controlling the processing technology of multi-connected guide blades. There are many casting defects that lead to the problem of low yield.

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Abstract

The invention discloses a casting forming process of a complex high temperature alloy multi-union guide vane casting, and belongs to the technical field of precision casting. The process is characterized in that a casting body wax mold is prepared, and the casting body wax mold and a rigging system are assembled into a module; the module is coated with refractory coating layer by layer, is sent into a dewaxing kettle for dewaxing, and is sent into a baking furnace for high temperature pre-baking; the exterior of a shell is wrapped in a step type and is tied with refractory insulation cotton; ahigh temperature alloy rod is remelted and smelted to obtain high temperature alloy metal liquid; before pouring, the shell is sent into the baking furnace again, and then is sent into a vacuum induction casting furnace, and the high temperature alloy metal liquid is poured into the shell; and after pouring is completed, heat preservation is carried out, and shell removal, cutting, sand blastingand polishing are carried out after furnace exiting. The casting forming process effectively reduces or eliminates casting defects such as looseness and cracking easily generated at the connecting positions of hot joint vanes and small edge plates, the yield is improved to 75% to 80%, and the process is suitable for complex high temperature alloy multi-union guide vane casting.

Description

Technical field [0001] The invention relates to a casting molding process of a complex high-temperature alloy multi-connected guide vane casting, and belongs to the technical field of precision casting. Background technique [0002] Superalloys, also known as heat-resistant alloys and superalloys, refer to metal materials that have long-term creep resistance, high strength, and corrosion resistance at temperatures above 600°C and under stress. Based on their outstanding performance in high-temperature working environments , Superalloys are widely used in the hot end of aero engines and gas turbines-power turbines. As a typical hot-end casting, guide blades (static blades) mostly adopt complex thin-walled multi-blade conjoined structures, and the overall structure thickness varies greatly. They work under extreme high temperature, complex load, oxidizing atmosphere and corrosive gas environment for a long time. In terms of dimensional accuracy requirements, or the internal qualit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04B22C9/22B22C9/08B22D27/04
CPCB22C9/04B22C9/082B22C9/088B22C9/22B22D27/04
Inventor 王磊晏福斌周文亮姜啸候继伟刘振军卢新昌
Owner AEROSPACE HIWING HARBIN TITANIUM IND
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