A production process for improving the mechanical properties of tungsten-nickel-copper alloy

A production process and copper alloy technology, which is applied in the field of powder metallurgy, can solve the problems of low mechanical properties of tungsten-nickel-copper alloys, achieve the effects of stable production process state, stable performance, and improved mechanical properties

Active Publication Date: 2022-05-27
XIAN HUASHAN TUNGSTEN PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process uses two ball mills to refine the mixed powder crystal blocks and improve the activity, combined with controlling the sintering temperature to make the copper solution fully contact with the tungsten particles and nickel phase, so as to eliminate the impurities in the tungsten-nickel-copper sintered compact before the pores are closed and densified. Exclusion, combined with modulation treatment to retain the microstructure of tungsten-nickel-copper alloy at high temperature to room temperature and effectively eliminate internal stress, combined with vacuum annealing treatment to remove harmful hydrogen elements, under the synergistic effect of the above processes, the wettability of copper and tungsten is improved Improve, effectively improve the mechanical properties of tungsten-nickel-copper alloys, and solve the problem of low mechanical properties of tungsten-nickel-copper alloys

Method used

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  • A production process for improving the mechanical properties of tungsten-nickel-copper alloy

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Effect test

Embodiment 1

[0031] like figure 1 As shown, this embodiment includes the following steps:

[0032] Step 1. Mixing: According to the nominal composition of the target product 90WNiCu alloy, tungsten powder, cobalt powder, nickel powder and copper powder are selected as raw materials to weigh and put into an inclined mixer for dry grinding and mixing to obtain mixed powder; the The ratio of ball to material mixed by dry grinding is 4:1, and the time is 7h;

[0033]Step 2, granulation: adding polyethylene glycol to the mixed powder obtained in step 1, then wet grinding and mixing, and then using a spray drying tower for spray drying granulation to obtain 40-120 mesh granules; The added mass of ethylene glycol is 2.0% of the mass of the mixed powder; the wet grinding and mixing are carried out in a ball mill, the medium used is ethanol solution, the ratio of ball to material is 3:1, and the time of wet grinding and mixing is 12h;

[0034] Step 3, pressing and forming: the granulated material...

Embodiment 2

[0040] like figure 1 As shown, this embodiment includes the following steps:

[0041] Step 1, mixing: According to the nominal composition of the target product 92WNiCu alloy, select tungsten powder, cobalt powder, nickel powder and copper powder as raw materials to weigh and put them into an inclined mixer for dry grinding and mixing to obtain mixed powder; The ratio of ball to material mixed by dry grinding is 4:1, and the time is 8h;

[0042] Step 2, granulation: adding polyethylene glycol to the mixed powder obtained in step 1, then wet grinding and mixing, and then using a spray drying tower for spray drying granulation to obtain 40-120 mesh granules; The added mass of ethylene glycol is 2.0% of the mass of the mixed powder; the wet grinding and mixing are carried out in a ball mill, the medium used is ethanol solution, the ratio of ball to material is 4:1, and the time of wet grinding and mixing is 8h;

[0043] Step 3, pressing and forming: the granulated material obta...

Embodiment 3

[0049] like figure 1 As shown, this embodiment includes the following steps:

[0050] Step 1. Mixing: According to the nominal composition of the target product 93WNiCu alloy, tungsten powder, cobalt powder, nickel powder and copper powder are selected as raw materials to weigh and put into an inclined mixer for dry grinding and mixing to obtain mixed powder; the The ratio of ball to material mixed by dry grinding is 4:1, and the time is 9h;

[0051] Step 2, granulation: adding polyethylene glycol to the mixed powder obtained in step 1, then wet grinding and mixing, and then using a spray drying tower for spray drying granulation to obtain 40-120 mesh granules; The mass of ethylene glycol added is 2.0% of the mass of the mixed powder; the wet grinding and mixing are carried out in a ball mill, the medium used is ethanol solution, the ratio of ball to material is 4:1, and the time of wet grinding and mixing is 16h;

[0052] Step 3, pressing and forming: the granulated materia...

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Abstract

The invention discloses a production process for improving the mechanical properties of a tungsten-nickel-copper alloy. The production process comprises: 1. Dry grinding and mixing raw materials to obtain mixed powder; 2. Spray drying and granulating to obtain granules after wet grinding; 3. Pressing to obtain a tungsten-nickel-copper compact; 4. Preheating and then heating and heat preservation to obtain a tungsten-nickel-copper sintered billet; 5. Rapid cooling after heating and heat preservation; 6. Vacuum annealing to obtain a tungsten-nickel-copper alloy. The present invention adopts two ball mills to refine the mixed powder crystal blocks and improve the activity, combined with controlling the sintering temperature to make the copper solution fully contact with the tungsten particles and the nickel phase, so as to remove the impurities in the tungsten-nickel-copper sintered compact before the pores are closed and densified , combined with modulation treatment to retain the microstructure of tungsten-nickel-copper alloy at high temperature to room temperature and effectively eliminate internal stress, combined with vacuum annealing treatment to remove harmful hydrogen elements, synergistically improve the mechanical properties of tungsten-nickel-copper alloy, and solve the problem of tungsten-nickel-copper alloy The problem of low mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and in particular relates to a production process for improving the mechanical properties of a tungsten-nickel-copper alloy. Background technique [0002] Tungsten alloy materials mainly include two series: tungsten-nickel-copper alloy and tungsten-nickel-iron alloy. Tungsten-nickel-copper alloy is an alloy formed by adding nickel and copper to tungsten, and an alloy formed by adding other metal elements (such as Co, Mn, Cr, etc.) on this basis. Tungsten-nickel-copper alloy is non-ferromagnetic and has relatively good electrical and thermal conductivity. It is often used in some special requirements, such as gyroscope rotors, counterweights of nuclear submarines, and other devices and instruments that are required to work under the action of a magnetic field. It is used as a balance and counterweight material in attitude instruments of communication satellites and Spey engines. Howeve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/04C22C27/04C22F1/02C22F1/18
CPCC22C1/045C22C27/04C22F1/18C22F1/02
Inventor 刘方舟赵永华张广卫潘王虎白磊彭媛
Owner XIAN HUASHAN TUNGSTEN PROD CO LTD
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