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Method for manufacturing aluminum and yttrium-containing multi-element nickel-based alloy ingot blank

A nickel-based alloy and a manufacturing method technology are applied in the field of manufacturing multi-component nickel-based alloy ingots, which can solve the problems of serious shrinkage cavities of the ingots, improper cooling methods of the ingots, internal cracks, etc., so as to eliminate internal cracks and improve composition uniformity. Sexuality and controllability effects

Active Publication Date: 2012-04-18
西安诺博尔稀贵金属材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of target is generally machined from an alloy ingot. At present, there are three main problems in its production: one is the composition control, mainly the range control and uniformity of the rare earth element Y; the other is the control of the oxygen content. If the amount is too high, splashing will easily occur during the ion plating process, resulting in uneven coating on the surface of the parts; third, there are internal cracks in the billet, which can be avoided by slow solidification, but the shrinkage cavity of the billet is very serious, almost shrinking to the bottom , cannot meet the needs of processing
The water-cooled mold can solve the shrinkage cavity problem very well, but if the alloy is quenched, internal cracks will be generated inside the ingot, and it is easy to crack during processing
In addition, improper cooling of the ingot is also prone to internal cracks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Melting aluminum and yttrium together in a magnesia crucible in a vacuum melting furnace, and keeping the temperature of the melt in the crucible at 1200°C for 20 minutes to obtain an aluminum-yttrium master alloy melt;

[0020] (2) Select a flat steel mold with a mold wall thickness of not less than 15mm and a cavity thickness of not more than 15mm as a casting mold, and cast the aluminum-yttrium master alloy melt into an aluminum-yttrium master alloy; the mass fraction of Y in the aluminum-yttrium master alloy is 0.1% , the balance being Al and other unavoidable impurities;

[0021] (3) Melting the aluminum-yttrium master alloy together with Cr, Si and Ni in a magnesia crucible in a vacuum melting furnace, and keeping it warm for 30 minutes after the temperature of the melt in the crucible rises to 1400° C., to obtain a nickel-based alloy melt. The nickel-based alloy melt is cast into a nickel-based alloy ingot with a steel mold; the mass fraction of each element ...

Embodiment 2

[0025] The preparation method of this embodiment is the same as that of Example 1, except that the temperature of the molten aluminum and yttrium is 1400° C., and the holding time is 10 minutes; the mass fraction of Y in the aluminum-yttrium master alloy is 10%, and the balance It is Al and other unavoidable impurities; the melting temperature of the smelting aluminum-yttrium master alloy and Cr, Si and Ni is 1500°C, and the holding time is 20min; the mass fraction of each element in the nickel-based alloy ingot is: Cr 21.5%, Al 13.5%, Y 1.5%, Si 1%, the balance is Ni and other unavoidable impurities; the temperature for melting the nickel-based alloy ingot is 1500°C, and the holding time is 18min.

Embodiment 3

[0027] The preparation method of this embodiment is the same as that of Example 1, except that the temperature of the melt for smelting aluminum and yttrium is 1500° C., and the holding time is 5 minutes; the mass fraction of Y in the aluminum-yttrium master alloy is 5%, and the balance It is Al and other unavoidable impurities; the melt temperature of smelting aluminum-yttrium master alloy and Cr, Si and Ni is 1700°C, and the holding time is 17min; the mass fraction of each element in the nickel-based alloy ingot is: Cr 19.5%, Al 13%, Y 0.68%, Si 0.9%, the balance is Ni and other unavoidable impurities; the temperature for melting the nickel-based alloy ingot is 1800°C, and the holding time is 3min.

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Abstract

The invention relates to a method for manufacturing an aluminum and yttrium-containing multi-element nickel-based alloy ingot blank, which comprises the following steps of: 1, preparing intermediate aluminum-yttrium alloy melt; 2, casting the intermediate aluminum-yttrium alloy melt into an intermediate aluminum-yttrium alloy; 3, vacuum-melting and casting the intermediate aluminum-yttrium alloy and other alloy elements containing Ni into a nickel-based alloy ingot; 4, vacuum-melting and casting the nickel-based alloy ingot into a nickel-based alloy ingot blank; and 5, cooling the nickel-based alloy ingot blank to room temperature to obtain the aluminum and yttrium-containing multi-element nickel-based alloy ingot blank. Through the method, the component uniformity and controllability of the rare earth element yttrium in the ingot blank are greatly improved; the oxygen content of the prepared ingot blank can meet operating requirements; a shrinkage cavity of the ingot blank is reducedto be within a half of the height of the ingot blank; and internal cracks of the ingot blank are completely eliminated.

Description

technical field [0001] The invention relates to a method for manufacturing a nickel-based alloy ingot, in particular to a method for manufacturing a multi-element nickel-based alloy ingot containing aluminum and yttrium. Background technique [0002] Nickel-based alloy target is a new generation of military engine turbine blade surface protective coating material in my country, which generally contains Ni, Al, Y, Co, Cr, Si and other elements. This type of coating has good toughness, high strength and good resistance to high temperature oxidation and hot corrosion resistance. The technologies currently used to deposit the coating mainly include: electron beam physical vapor deposition, triode sputtering, low-pressure plasma spraying and multi-arc ion plating. This type of target is generally machined from an alloy ingot. At present, there are three main problems in its production: one is the composition control, mainly the range control and uniformity of the rare earth elem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C19/00B22D7/00
Inventor 韩吉庆毛利权何健丁锋唐进郑学军贾勇孟志军孙惠娴单建红
Owner 西安诺博尔稀贵金属材料股份有限公司