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A kind of nickel niobium chromium master alloy and preparation method thereof

An intermediate alloy and chromium alloy technology, applied in the field of metal materials, can solve problems such as refractory element composition, melting point difference, element burning loss, etc., achieve low gas impurity content, improve uniformity and stability, and meet production requirements.

Active Publication Date: 2022-04-15
CHENGDE TIANDA VANADIUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the production of high-temperature alloys, if the metal is directly added in the form of simple substances, it is easy to cause burning loss of elements and composition segregation of refractory elements due to differences in melting point and density.
At the same time, metal nickel is expensive and not suitable for mass production. At the same time, the melting temperature is high and the preparation process is complicated, which leads to high requirements for equipment in the industrial production process, thereby increasing production costs.

Method used

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  • A kind of nickel niobium chromium master alloy and preparation method thereof
  • A kind of nickel niobium chromium master alloy and preparation method thereof
  • A kind of nickel niobium chromium master alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation method of nickel niobium chromium master alloy specifically comprises the following steps:

[0033] (1) First dry niobium pentoxide, chromium trioxide and aluminum powder at 118°C for 12 hours, then weigh 90.33 kg of niobium pentoxide, 53.84 kg of chromium trioxide and 49.69 kg of aluminum powder and put them into V Fully mix in the type mixer, and then put the uniformly mixed charge into the sintered corundum crucible to ignite the reaction. The temperature of the thermite reaction is 1950°C, and the time is 45s. After cooling for 12 hours, remove the crucible and take out the alloy ingot. After removing the slag layer and oxide film on the surface of the alloy ingot, it is crushed and finished to 5-50mm, and after magnetic separation and manual selection, niobium-chromium alloy is obtained;

[0034] (2) First dry niobium-chromium alloy and electrolytic nickel at 120°C for 12 hours, then weigh 57.00 kg of niobium-chromium alloy and 43.00 kg of electroly...

Embodiment 2

[0037] The preparation method of nickel niobium chromium master alloy specifically comprises the following steps:

[0038] (1) First dry niobium pentoxide, chromium trioxide and aluminum powder at 119°C for 12 hours, then weigh 92.83 kg of niobium pentoxide, 51.29 kg of chromium trioxide and 49.63 kg of aluminum powder into V Fully mix in the type mixer, and then put the uniformly mixed charge into the sintered corundum crucible to ignite the reaction. The temperature of the thermite reaction is 1920°C, and the time is 45s. After cooling for 12 hours, remove the crucible and take out the alloy ingot. After removing the slag layer and oxide film on the surface of the alloy ingot, it is crushed and finished to 5-50mm, and after magnetic separation and manual selection, niobium-chromium alloy is obtained;

[0039] (2) First dry niobium-chromium alloy and electrolytic nickel at 120°C for 12 hours, then weigh 57.00 kg of niobium-chromium alloy and 43.00 kg of electrolytic nickel, m...

Embodiment 3

[0042] The preparation method of nickel niobium chromium master alloy specifically comprises the following steps:

[0043] (1) First dry niobium pentoxide, chromium trioxide and aluminum powder at 120°C for 12 hours, then weigh 96.59kg of niobium pentoxide, 47.44kg of chromium trioxide and 49.54kg of aluminum powder and put them into V Fully mix in the type mixer, and then put the uniformly mixed charge into the sintered corundum crucible to ignite the reaction. The temperature of the thermite reaction is 1900°C, and the time is 46s. After cooling for 12 hours, remove the crucible and take out the alloy ingot. After removing the slag layer and oxide film on the surface of the alloy ingot, it is crushed and finished to 5-50mm, and after magnetic separation and manual selection, niobium-chromium alloy is obtained;

[0044] (2) First dry niobium-chromium alloy and electrolytic nickel at 120°C for 12 hours, then weigh 57.00 kg of niobium-chromium alloy and 43.00 kg of electrolytic...

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Abstract

The invention discloses a nickel-niobium-chromium master alloy, which is composed of 36.0%-41.0% niobium, 16.0%-21.0% chromium, nickel and unavoidable impurities in the balance. The preparation method is as follows: (1) Mix niobium source, chromium source and aluminum, carry out aluminothermic reaction, obtain niobium-chromium alloy; (2) mix niobium-chromium alloy and electrolytic nickel, carry out vacuum induction melting, obtain nickel-niobium-chromium alloy liquid; (3) The nickel-niobium-chromium alloy solution is cooled to obtain. The present invention makes the nickel-niobium-chromium intermediate alloy have uniform composition, small segregation, and low gas impurity content through the control of composition and content. When melting high-temperature alloys, it helps to homogenize the composition of high-temperature alloys, prevent composition segregation, and reduce element burning loss. Improve the quality of superalloys.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a nickel-niobium-chromium master alloy and a preparation method thereof. Background technique [0002] Superalloys refer to a class of alloys based on iron, nickel, and cobalt that serve in high-temperature environments, can withstand severe mechanical stress, and have good surface stability. Superalloys generally have high room temperature and high temperature strength, good oxidation resistance and hot corrosion resistance, excellent creep and fatigue resistance, good structural stability and reliability in use. Therefore, superalloys are not only important for aviation and aerospace engines The key material of high-temperature components is also an indispensable important material in the fields of ships, energy, petrochemicals and other industries. [0003] Nickel-based superalloy is a superalloy with nickel as the matrix (generally greater than 50%), and has high str...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22C1/03C22B5/04C22B9/04
CPCC22C30/00C22C19/058C22C1/023C22C1/03C22B5/04C22B9/04Y02P10/25
Inventor 王志军刘强孙鑫何建成刘志彬段善博纪海龙王东华
Owner CHENGDE TIANDA VANADIUM IND
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