Manufacturing method of fine-grain high-hardness tungsten cobalt nickel alloy

A high hardness, nickel alloy technology, applied in the field of powder metallurgy, can solve the problems of complex production process, complex shape, alloy grain growth, etc., and achieve the effect of high densification, fine grain and simple process

Active Publication Date: 2015-07-08
XIAN HUASHAN TUNGSTEN PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, the HRC hardness of tungsten-based alloys is between 24 and 32. At present, tungsten-based alloy products with high hardness special-shaped parts or plates are required in the market, and the alloy HRC hardness is required to be ≥ 35. Now we can only rely on forging deformation treatment to achieve this. Hardness, but the complex production process and large equipment investment lead to high production costs, low profits, and lack of market competitiveness; at the same time, some products are limited by extremely small size or complex shape, so it is not suitable to use deformation strengthening to improve hardness. Not yet available for production
[0004] In order to achieve the purpose of improving the hardness of tungsten-based alloys, there are also repo

Method used

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  • Manufacturing method of fine-grain high-hardness tungsten cobalt nickel alloy
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  • Manufacturing method of fine-grain high-hardness tungsten cobalt nickel alloy

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Embodiment 1

[0032] The preparation method of the fine-grained high-hardness tungsten-cobalt-nickel alloy of this embodiment comprises the following steps:

[0033] Step 1. Weigh tungsten powder, cobalt powder and nickel powder respectively by mass ratio W: Co: Ni=90: 5: 5; the Fischer particle size of the tungsten powder is 2.5 μm~3.5 μm, and the cost of the cobalt powder is The Fisherman's particle size is 1 μm to 2 μm, and the Fisherman's particle size of the nickel powder is 2.6 μm to 3.6 μm;

[0034] Step 2, adding the tungsten powder, cobalt powder and nickel powder weighed in step 1 into a mixer and mixing for 6 hours to obtain a mixed powder;

[0035] Step 3, using a cold isostatic press to press the mixed powder described in step 2 under a pressure of 150 MPa for 50 seconds to obtain a compact;

[0036] Step 4: Put the compact described in step 3 into a molybdenum wire pusher furnace, sinter at a temperature of 1500°C for 40 minutes to obtain a sintered compact, and then vacuum a...

Embodiment 2

[0039] The preparation method of the fine-grained high-hardness tungsten-cobalt-nickel alloy of this embodiment comprises the following steps:

[0040] Step 1. Weigh tungsten powder, cobalt powder and nickel powder respectively by mass ratio W: Co: Ni=93: 3.5: 3.5; the Fischer particle size of the tungsten powder is 2.5 μm~3.5 μm, and the cost of the cobalt powder is The Fisherman's particle size is 1 μm to 2 μm, and the Fisherman's particle size of the nickel powder is 2.6 μm to 3.6 μm;

[0041] Step 2, adding the tungsten powder, cobalt powder and nickel powder weighed in step 1 into a mixer and mixing for 6 hours to obtain a mixed powder;

[0042] Step 3, using a cold isostatic press to press the mixed powder described in step 2 under a pressure of 150 MPa for 50 seconds to obtain a compact;

[0043] Step 4. Put the compact described in step 3 into a molybdenum wire pusher furnace, sinter at a temperature of 1540°C for 40 minutes to obtain a sintered compact, and then vacu...

Embodiment 3

[0046] The preparation method of the fine-grained high-hardness tungsten-cobalt-nickel alloy of this embodiment comprises the following steps:

[0047] Step 1. Weigh tungsten powder, cobalt powder and nickel powder respectively by mass ratio W: Co: Ni=93: 3: 4; the Fischer particle size of the tungsten powder is 2.5 μm~3.5 μm, and the cost of the cobalt powder is The Fisherman's particle size is 1 μm to 2 μm, and the Fisherman's particle size of the nickel powder is 2.6 μm to 3.6 μm;

[0048] Step 2, adding the tungsten powder, cobalt powder and nickel powder weighed in step 1 into a mixer and mixing for 4 hours to obtain a mixed powder;

[0049] Step 3, using a cold isostatic press to press the mixed powder described in step 2 under a pressure of 140 MPa for 60 seconds to obtain a compact;

[0050] Step 4: Put the green compact described in step 3 into a molybdenum wire pusher furnace, sinter at a temperature of 1480°C for 30 minutes to obtain a sintered compact, and then va...

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Abstract

The invention provides a manufacturing method of fine-grain high-hardness tungsten cobalt nickel alloy. The manufacturing method comprises the following steps of 1 respectively weighing tungsten powder, cobalt power and nickel powder, 2 adding the tungsten powder, cobalt power and nickel powder into a mixing machine for mixing to obtain mixed powder, 3 pressing the mixed powder to form a press blank, 4 sintering the press blank to obtain a sintered blank and then performing vacuum annealing on the sintered blank to obtain the fine-grain high-hardness tungsten cobalt nickel alloy. The size of the manufactured fine-grain high-hardness tungsten cobalt nickel alloy prepared by means of the manufacturing method is not larger than 20 microns, the hardness is not smaller than 35, and the fine-grain high-hardness tungsten cobalt nickel alloy is small in grain and high in densification degree.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and in particular relates to a preparation method of fine-grained high-hardness tungsten-cobalt-nickel alloy. Background technique [0002] Tungsten-based alloys have the characteristics of high density, high strength and hardness, good electrical and thermal conductivity, low thermal expansion coefficient, strong radiation absorption ability, high pressure resistance, and excellent electrical corrosion resistance, which are conducive to machining, welding, forging and heat treatment. , plays an irreplaceable role in the fields of national defense, aerospace, electronic information, energy, metallurgy, machining and nuclear industry, occupies an important position in the national economy, and has become one of the most active research fields in the field of materials science . [0003] In recent years, with the development of science and technology, higher requirements have been put fo...

Claims

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Application Information

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IPC IPC(8): C22C1/04C22C27/04
Inventor 王占锋罗崇玲郑军彭媛
Owner XIAN HUASHAN TUNGSTEN PROD CO LTD
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