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Nickel boron carbon intermediate alloy and preparation method thereof

A master alloy, nickel-boron technology, applied in the field of nickel-boron-carbon master alloy and its preparation, can solve the problems of poor composition uniformity of alloy ingots and failure to meet the requirements of nickel-based superalloys, etc.

Active Publication Date: 2019-11-05
CHENGDE TIANDA VANADIUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the addition of C elements in the production of nickel-based superalloys is mainly in the form of simple substances, and the addition of B elements is mainly in the form of NiB alloys. Due to the low content of C, adding simple substances to nickel-based superalloys will lead to alloy ingots The uniformity of the composition is not good, and the alloy ingot will have large segregation, which cannot meet the requirements for the preparation of nickel-based superalloys

Method used

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  • Nickel boron carbon intermediate alloy and preparation method thereof
  • Nickel boron carbon intermediate alloy and preparation method thereof
  • Nickel boron carbon intermediate alloy and preparation method thereof

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preparation example Construction

[0023] The present invention provides the preparation method of nickel-boron-carbon master alloy described in the above scheme, comprising the following steps:

[0024] (1) Aluminum, boric anhydride and nickel oxide are mixed for aluminothermic reaction, and a nickel-boron master alloy is obtained after cooling;

[0025] (2) Vacuum melting the nickel-boron master alloy with nickel and carbon, and cooling to obtain a nickel-boron-carbon master alloy.

[0026] The invention mixes aluminum, boric anhydride and nickel oxide for aluminothermic reaction, and obtains a nickel-boron master alloy after cooling. In the present invention, the mass ratio of aluminum, boron anhydride and nickel oxide is preferably (1.301-1.473):(1.018-1.273):(2.045-2.148), more preferably 1.473:1.273:2.045. In the present invention, the aluminum, boric anhydride and nickel oxide are preferably powders; the present invention has no special requirements on the source of the aluminum, boric anhydride and nic...

Embodiment 1

[0033] 1. Aluminum thermal smelting process

[0034] (1) Dry the aluminum powder, nickel oxide and boric anhydride at a temperature of 120°C for 12 hours.

[0035](2) Raw material ratio: aluminum powder 73.65kg, nickel oxide 102.25kg, boric anhydride 63.65kg. Load the raw materials into the V-type mixer and mix them evenly to ensure full contact between the raw materials.

[0036] (3) Put the evenly mixed charge into the built graphite crucible, ignite the reaction, cool for 6 hours, dismantle the furnace, take out the alloy ingot, and weigh.

[0037] (4) After removing the slag layer and oxide film on the surface of the alloy ingot, crushing and finishing to 5-50 mm, and after magnetic separation and manual selection, a nickel-boron intermediate alloy is obtained.

[0038] Second, the vacuum melting process

[0039] (1) The nickel, carbon powder, and nickel-boron intermediate alloy are subjected to drying treatment, the drying temperature is 120° C., and the drying time is...

Embodiment 2

[0046] 1. Aluminothermic smelting process

[0047] (1) The aluminum powder, nickel oxide, and boric anhydride are dried, and the drying temperature is 120° C., and the drying time is 12 hours.

[0048] (2) Raw material ratio: aluminum powder 73.65kg, nickel oxide 102.25kg, boric anhydride 63.65kg. Load the raw materials into the V-type mixer and mix them evenly to ensure full contact between the raw materials.

[0049] (3) Put the evenly mixed charge into the built graphite crucible, ignite the reaction, cool for 6 hours, dismantle the furnace, take out the alloy ingot, and weigh.

[0050] (4) After removing the slag layer and oxide film on the surface of the alloy ingot, crushing and finishing to 5-50 mm, and after magnetic separation and manual selection, a nickel-boron intermediate alloy is obtained.

[0051] Second, the vacuum melting process

[0052] (1) The nickel, carbon powder, and nickel-boron intermediate alloy are subjected to drying treatment, the drying tempera...

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Abstract

The invention provides nickel boron carbon intermediate alloy and a preparation method thereof, and relates to the technical field of a metal material. The nickel boron carbon intermediate alloy comprises the following components measured by mass content: 15.0-18.0% of B, 0.5-2.5% of C and the allowance of Ni. The alloy components and content are reasonably designed, so that the components of thenickel boron carbon intermediate alloy is uniform and stable, the proportion of alloying elements in the final product of nickel-base superalloy can be controlled better, and alloying can be improvedbetter. The invention provides the preparation method of the nickel boron carbon intermediate alloy. The preparation method can prepare the intermediate alloy by an aluminothermic method and vacuum smelting method, can improve the uniform stability of the components of the nickel boron carbon intermediate alloy and reduce the impurity content, and therefore obtains the nickel boron carbon intermediate alloy with accurate chemical components, high purity, low density and a low melting point.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a nickel-boron-carbon master alloy and a preparation method thereof. Background technique [0002] High-temperature alloys refer specifically to high-alloyed metal materials that use nickel, cobalt, iron or their alloys with chromium as the matrix, can withstand relatively large and complex stress for a long time in an environment above 600°C, and have surface stability. Among them, due to the advantages of nickel in chemical stability, alloying ability and phase stability, nickel-based superalloys have better high-temperature strength, fatigue resistance, hot corrosion resistance, Organizational stability and other properties. [0003] Nickel-based superalloys are the most widely used superalloys in the world. They are mainly used in aerospace rocket engines, aero engines, industrial gas turbines and other high-temperature components. They are also widely used in transp...

Claims

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Application Information

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IPC IPC(8): C22C19/03C22C1/02
CPCC22C1/023C22C19/03
Inventor 王志军刘强刘志彬孙鑫段善博
Owner CHENGDE TIANDA VANADIUM IND
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