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Method for preparing K438 alloy by adopting K438 alloy return material

A technology for returning materials and alloys, applied in the direction of improving process efficiency and improving energy efficiency, can solve problems such as waste of precious metals, and achieve the effects of strong applicability, reduction of production costs, and improvement of material utilization rate.

Inactive Publication Date: 2014-02-05
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Description
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Problems solved by technology

In the production of castings, the utilization rate of K438 alloy is about 25%, and a large amount of returned materials (ie runners, risers and waste castings, etc.) , Nb, W, Mo, and Ta are all expensive metal elements, resulting in a serious waste of precious metals

Method used

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  • Method for preparing K438 alloy by adopting K438 alloy return material

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Embodiment Construction

[0018] A kind of preparation method that adopts K438 alloy return material to prepare K438 alloy, comprises the steps:

[0019] (1) Purification treatment of K438 alloy return material: first, carry out tumbling treatment on the return material, and the time of tumbling treatment is 8 hours, then perform sand blasting on the surface of the return material, and then use compressed air to blow the The surface of the returned material is blown clean;

[0020] (2) The return material is smelted into the return material ingot: a 500kg vacuum induction melting furnace is used for melting, and the purified return material is loaded into the crucible of the melting furnace. Heating with electric power of 120kW for 25 minutes, and then heating with electric power of 200 for 12 minutes. After the surface of the returned material turns dark red, the melting furnace is heated with electric power of 240kW until all the returned materials are melted into a melt; use contact thermocouple or ...

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Abstract

The invention relates to a method for preparing a K438 alloy by adopting a K438 alloy return material. The technical scheme is as follows: the preparation method comprises the following steps of carrying out purifying treatment on the K438 alloy return material; smelting the K438 alloy return material into a return material charge bar; regulating the chemical components of the return material charge bar; smelting the return material charge bar into a finished product K438 alloy ingot. The method disclosed by the invention can be used for producing the K438 alloy which meets the requirement for usage of a product, increases the utilization ratio of materials and reduces the waste of precious metal resources.

Description

technical field [0001] The invention relates to a method for preparing an alloy, in particular to a method for preparing a K438 alloy by using returned material of the K438 alloy. Background technique [0002] The K438 nickel-based cast superalloy is equivalent to the IN738 alloy in the United States. Since the K438 alloy contains a variety of solid solution strengthening elements, it not only has excellent hot corrosion resistance, but also has high high temperature strength and good structural stability. It is mainly used for Make blades that work below 900°C. In the production of castings, the utilization rate of K438 alloy is about 25%, and a large amount of returned materials (ie runners, risers and waste castings, etc.) , Nb, W, Mo, and Ta are all expensive metal elements, resulting in a serious waste of precious metals. Contents of the invention [0003] The purpose of the present invention is to provide a kind of preparation method that adopts K438 alloy return m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C22C1/03C22B9/02C22B9/04
CPCY02P10/20Y02P10/25
Inventor 满延林王宇飞王玉娟陈震倪伟
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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