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Method for preparing K4169 alloy by using nickel-base cast high-temperature alloy K4169 returns

A technology of superalloy and return material, applied in the direction of improving process efficiency, can solve problems such as increasing the production cost of the engine, and achieve the effects of good plasticity, excellent lasting performance and good stability

Inactive Publication Date: 2012-04-25
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When the currently used K4169 alloy is used in the production of aero-engine casing castings, the utilization rate of the casing parts to the alloy is generally only 30-50%, and a large amount of returned materials are produced in the production. It will inevitably increase the production cost of the engine, so it is necessary to conduct research on the utilization of K4169 returned materials

Method used

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  • Method for preparing K4169 alloy by using nickel-base cast high-temperature alloy K4169 returns
  • Method for preparing K4169 alloy by using nickel-base cast high-temperature alloy K4169 returns

Examples

Experimental program
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Effect test

Embodiment 1

[0035] The process steps of the method for preparing the K4169 alloy by utilizing the returned material of the nickel-based cast superalloy K4169 are as follows.

[0036] (1) K4169 alloy return material pretreatment

[0037] The return materials generated during the production process of K4169 alloy castings, namely risers, runners and waste castings, are subjected to sand blowing treatment, and the return materials are put into the sand blowing machine. Quartz sand, blowing sand on the surface of the returned material, blowing off the scale, mold shell, sticky iron, inclusions and sand inclusions on the surface of the returned material, so that the surface of the material is smooth and free of debris.

[0038] (2) K4169 alloy return material is smelted once

[0039] The vacuum induction melting furnace is used to melt the alloy. The specific operation steps are: when the vacuum degree is ≤1.33Pa, start heating up, and control the heating rate at 13°C / min. When the surface of...

Embodiment 2

[0053] The process steps of the method for preparing the K4169 alloy by utilizing the returned material of the nickel-based cast superalloy K4169 are as follows.

[0054] (1) K4169 alloy return material pretreatment

[0055] The return materials generated during the production process of K4169 alloy castings, namely risers, runners and waste castings, are subjected to sand blowing treatment, and the return materials are put into the sand blowing machine. Quartz sand, blowing sand on the surface of the returned material, blowing off the scale, mold shell, sticky iron, inclusions and sand inclusions on the surface of the returned material, so that the surface of the material is smooth and free of debris.

[0056] (2) K4169 alloy return material is smelted once

[0057] The alloy is smelted in a vacuum induction melting furnace. The specific operation steps are: when the vacuum degree is less than or equal to 1.33Pa, start heating up and control the heating rate at 15°C / min. Whe...

Embodiment 3

[0071] The process steps of the method for preparing the K4169 alloy by utilizing the returned material of the nickel-based cast superalloy K4169 are as follows.

[0072] (1) K4169 alloy return material pretreatment

[0073] The return materials generated during the production process of K4169 alloy castings, namely risers, runners and waste castings, are subjected to sand blowing treatment, and the return materials are put into the sand blowing machine. Quartz sand, blowing sand on the surface of the returned material, blowing off the scale, mold shell, sticky iron, inclusions and sand inclusions on the surface of the returned material, so that the surface of the material is smooth and free of debris.

[0074] (2) K4169 alloy return material is smelted once

[0075] The alloy is smelted in a vacuum induction melting furnace. The specific operation steps are: when the vacuum degree is less than or equal to 1.33Pa, start heating up and control the heating rate at 10°C / min. Whe...

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Abstract

The invention discloses a method for preparing K4169 alloy by using nickel-base cast high-temperature alloy K4169 returns. The method comprises the following steps of: pretreating the K4169 alloy returns and performing primary smelting; performing secondary smelting dosing according to a scheme of 10 to 50 weight percent of the first return and 50 to 90 weight percent of novel materials; preparing return alloy ingots through the secondary smelting; performing the third smelting dosing according to a scheme of 10 to 50 percent of the secondary return and 50 to 90 percent of novel materials; preparing return alloy ingots through third smelting; and performing uniform heat treatment on the return alloy ingots prepared through the third smelting. In the method, the K4169 alloy returns are fully utilized and the waste of noble metal resources is reduced. Due to the three-time smelting, the prepared K4169 alloy has good alloy plasticity, high mid-temperature strength, excellent durability and high stability, reaches a level of novel material alloys, and can be widely applied to engines in multiple models.

Description

technical field [0001] The invention belongs to the technical field of nickel-based alloys, and in particular relates to a method for preparing K4169 alloys by utilizing returned materials of nickel-based cast superalloy K4169. Background technique [0002] The K4169 alloy was originally used as a deformed alloy, and was used in aero-engines in the form of cast alloys in 1965. The K4169 alloy is equivalent to the Inconel718C alloy in the United States. It is a precipitation-strengthened Ni-Cr-Fe-based superalloy with the γ″ phase and the γ′ phase as the strengthening phase. The alloy can be used in a wide range of medium and low temperatures (-253-700°C ) have high strength, plasticity, excellent corrosion resistance, radiation resistance and good welding performance. This alloy is mainly used for the production of anti-oxidation heat-strength structural parts and casing castings of engines working below 650 °C The chemical composition (mass%) of K4169 alloy is C0.02~0.08, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C19/05C22B7/00
CPCY02P10/20
Inventor 王宇飞满延林王铁军屠晓林费晶王永明杨刚陈震石玉娥
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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