Low-melting-point nickel-tungsten intermediate alloy and preparation process thereof

A master alloy and preparation technology, which is applied in the field of low melting point nickel-tungsten master alloy and its preparation, can solve the problems of high energy consumption, high melting point, difficulty in adding tungsten elements, etc., and achieve the effect of improving mechanical properties

Inactive Publication Date: 2019-05-31
陕西瑞有金属科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the high melting point of tungsten (3422C°), it is difficult to add tungsten as an additive when preparing special steel and superalloy materials, and it consumes high energy, and it is a future technology to prepare special steel and superalloy materials with tungsten as an additive. important trends in development

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  • Low-melting-point nickel-tungsten intermediate alloy and preparation process thereof

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preparation example Construction

[0032] A preparation process for a low-melting-point nickel-tungsten master alloy, comprising the following steps:

[0033] S1. Raw material preparation:

[0034] Select raw materials according to the following proportions, tungsten powder 38-55%, nickel powder balance,

[0035] Among them, the purity of tungsten powder is ≥99.95%, the particle size is ≥100 mesh, the nickel powder Ni is ≥99.70%, the particle size is ≥100 mesh;

[0036] S2, mixing materials:

[0037] Mix the selected tungsten powder and nickel powder into the mixer for mixing, and the mixing time is ≥4h; the mass ratio of tungsten powder and nickel powder is proportioned according to different grades or user requirements;

[0038] S3, molding:

[0039] The mixed powder is molded on an isostatic press or a hydraulic press to make a round billet or a square billet; the molding pressure is ≥200Mpa / cm 2 ;

[0040] S4. High temperature sintering:

[0041] Carrying out high-temperature sintering of round billet...

Embodiment 1

[0045] A nickel-tungsten master alloy with a low melting point is prepared from the following raw material ratios: 45% tungsten powder and 55% nickel powder; the tungsten powder has a purity of 99.96% and a particle size of 120 mesh; the nickel powder has a purity of 99.80% and a particle size of 150 mesh. The preparation process of nickel-tungsten master alloy in this embodiment, S1, raw material preparation: select raw materials according to the following ratio, tungsten powder 45%, nickel powder 55%; the purity of the tungsten powder is 99.96%, the particle size is 120 mesh; the nickel powder The purity of the powder is 99.80%, and the particle size is 150 mesh; S2, mixing: mix the selected tungsten powder and nickel powder into the mixing machine for mixing, and the mixing time is 5 hours; S3, molding: mix the mixed powder Formed on an isostatic press or hydraulic press to make round or square blanks; the forming pressure is 500Mpa / cm 2 ; S4, high-temperature sintering: ca...

Embodiment 2

[0048] A nickel-tungsten master alloy with a low melting point, which is made of the following raw material ratios: 48% tungsten powder and 52% nickel powder; the tungsten powder has a purity of 99.97% and a particle size of 150 mesh; the nickel powder has a purity of 99.90% and a particle size of 180 mesh. The preparation process of nickel-tungsten master alloy in this embodiment, S1, raw material preparation: select raw materials according to the following ratio, tungsten powder 48%, nickel powder 52%; the purity of the tungsten powder is 99.97%, the particle size is 150 mesh; the nickel powder The powder purity is 99.90%, and the particle size is 180 mesh; S2, mixing: mix the selected tungsten powder and nickel powder into the mixing machine for mixing, and the mixing time is 8 hours; S3, forming: mix the mixed powder Formed on an isostatic press or hydraulic press to make round or square blanks; the forming pressure is 400Mpa / cm 2 ; S4, high-temperature sintering: carry ou...

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Abstract

The invention discloses a low-melting-point nickel-tungsten intermediate alloy. The low-melting-point nickel-tungsten intermediate alloy is prepared by the following raw materials of 38-55% of tungsten powder and the balance of nickel according to the mixing ratio; the purity of the tungsten powder is higher than 99.95%, and the particle size of the tungsten powder is larger than or equal to 100 meshes; an nickel-tungsten alloy has a characteristic of low melting point when being used as an additive to prepare special steel and high temperature alloy materials; and moreover, the nickel powderand the tungsten powder both have low melting point characteristics at different mixing ratios, temperatures, pressures and heat insulation times. The invention further discloses a preparation processof the low-melting-point nickel-tungsten intermediate alloy. The preparation process of the low-melting-point nickel-tungsten intermediate alloy comprises the following steps of S1, raw material preparation, S2, material mixing, S3, molding, S4, high temperature sintering, and S5, crushing. The preparation process of the low-melting-point nickel-tungsten intermediate alloy has the advantages thatsimple specific experiment operation and ideal experimental result.

Description

technical field [0001] The invention relates to the technical field of alloy preparation, in particular to a nickel-tungsten master alloy with a low melting point and a preparation process thereof. Background technique [0002] Tungsten is widely used in filaments, heating bodies and heat shields, but it is more used in the preparation of additives for special steel and high-temperature alloy materials to improve the heat resistance and other mechanical properties of special steel or high-temperature alloy materials. Through tungsten additives The high-temperature resistant alloy materials produced are widely used in parts of aircraft, automobiles, ships and large turbine engines. However, due to the high melting point of tungsten (3422C°), it is difficult to add tungsten as an additive when preparing special steel and superalloy materials, and it consumes high energy, and it is a future technology to prepare special steel and superalloy materials with tungsten as an additiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C27/04C22C19/03C22C1/04C22C35/00C22C1/03
Inventor 马林生
Owner 陕西瑞有金属科技有限公司
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