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A nickel-tungsten master alloy and a method for preparing nickel-tungsten master alloy by electron beam melting

An electron beam melting and electron beam melting furnace technology, applied in the field of alloys, can solve the problems of low vacuum, unfavorable removal of impurity elements, slow heating rate, etc.

Active Publication Date: 2021-06-22
DALIAN UNIV OF TECH
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  • Description
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  • Application Information

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Problems solved by technology

The existing method of preparing nickel-tungsten master alloy is vacuum induction melting, whose vacuum degree is low, 5-30Pa, which is not conducive to removing impurity elements in the air. At the same time, the heating rate of vacuum induction melting is relatively slow, and the The maximum temperature is lower than 2000°C, which is not conducive to the rapid melting of the alloy

Method used

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  • A nickel-tungsten master alloy and a method for preparing nickel-tungsten master alloy by electron beam melting
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  • A nickel-tungsten master alloy and a method for preparing nickel-tungsten master alloy by electron beam melting

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Embodiment 1

[0039] A nickel-tungsten master alloy, wherein the mass fraction of tungsten in the nickel-tungsten master alloy is 35.1%-45%.

[0040] The nickel-tungsten master alloy is made by arc melting, vacuum induction melting or plasma arc melting.

Embodiment 2

[0042] Such as Figure 1-Figure 3 As shown, a method for preparing nickel-tungsten master alloy by electron beam smelting has the following steps:

[0043] S1. Weigh 1105.8g of nickel and 535.8g of tungsten, and the purity of nickel and tungsten is above 99.95;

[0044] S2, cutting the weighed nickel into 3 to 5 nickel cuboid blocks 8, and cutting the weighed tungsten into 6 to 8 tungsten cube blocks 3;

[0045]S3. Grinding the surfaces of the nickel cuboid block 8 and the tungsten cuboid block 3 to remove wire cutting traces, oil stains, impurities and defects on the surface, and then soak the nickel cuboid with an ultrasonic cleaning machine under alcohol immersion. Block 8 and the tungsten cube block 3 are cleaned;

[0046] S4. Place the cleaned nickel cuboid block 8 and the tungsten cube block 3 in the water-cooled copper crucible 5 of the electron beam melting furnace, place the tungsten cube block on the nickel cuboid block 8, and turn off the electron beam doors of s...

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Abstract

The invention discloses a nickel-tungsten master alloy and a method for preparing the nickel-tungsten master alloy by electron beam smelting. The method has the following steps: weighing nickel and tungsten; cutting the weighed nickel into 3 to 5 nickel cuboids block, cut the weighed tungsten into 6-8 tungsten cubic blocks; carry out two times of refining to obtain nickel-tungsten master alloy. The nickel-tungsten master alloy obtained in the present invention can effectively control the macro-segregation while reducing the content of trace elements such as carbon, nitrogen, phosphorus and oxygen in the nickel-tungsten master alloy; the melting temperature of the obtained nickel-tungsten master alloy is 1455 Between ℃ and 1526 ℃, samples were taken at different positions on the obtained nickel-tungsten master alloy, and XRF detection was performed, and the contents of nickel and tungsten were 63.14% and 36.86%, respectively.

Description

technical field [0001] The invention relates to an alloy and a method, in particular to a nickel-tungsten master alloy and a method for preparing the nickel-tungsten master alloy by electron beam smelting. Background technique [0002] Nickel-based superalloys have been widely used in aerospace, chemical metallurgy, energy power stations and Industrial fields such as transportation. When tungsten is added to the superalloy, it will produce additional strengthening effect through solid solution and carbide. If tungsten is directly added to the melt in the form of simple substance, it is necessary to increase the addition temperature, prolong the melting time, or increase the burning loss during the addition process. The rate is difficult to guarantee, resulting in multiple adjustments of the composition in front of the furnace, which affects the production efficiency of the product. When the size of the alloy ingot is large, the composition segregation will be more serious....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/03C22C1/02C22C1/03C22B9/22
CPCC22B9/228C22C1/023C22C1/03C22C19/03Y02P10/25
Inventor 谭毅尤启凡郑俊赵龙海石爽
Owner DALIAN UNIV OF TECH
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