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Preparation method of micron carbonyl iron and nickel alloy powder

A technology of nickel alloy powder and carbonyl iron, applied in the field of metallurgy, can solve the problems affecting the use of wave absorption, segregation of iron and nickel content of alloy particles, different physical and chemical properties, etc., to achieve excellent comprehensive mechanical properties, uniform distribution of iron and nickel, The effect of stable product quality

Active Publication Date: 2018-02-06
JIANGYOU HEBAO NANO MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some scientific research institutions have carried out experiments on the preparation of nano-scale carbonyl iron-nickel alloy powder, but the Ni(co) 4 and Fe(co) 5 After the liquid is premixed, it is vaporized and thermally decomposed, because Ni(co) 4 、Fe(co) 5 The physical and chemical properties are different, and it is easy to segregate the content of iron and nickel in alloy particles, which directly affects the performance of microwave absorption and so on.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: the preparation method of micron carbonyl iron, nickel alloy powder, comprises the following steps:

[0028] A1: High pressure synthesis of Ni(co) 4 , put the nickel raw material into the first reaction kettle, feed CO gas with a purity of 99%, and prepare Ni(co) at a pressure of 11MPa and a temperature of 130°C. 4 compound; the nickel raw material is water-quenched nickel with a particle size of 3μm and a Ni content of 92%;

[0029] A2: High pressure synthesis of Fe(co) 5 , put the iron raw material into the second reactor, feed CO gas with a purity of 99%, and prepare Fe(co) at a pressure of 15MPa and a temperature of 160°C. 5 compound; the iron raw material is sponge iron with a particle size of 5μm and an oxygen content below 3.0%;

[0030] A3: Evaporation Ni(co) 4 , the liquid Ni(co) prepared by the reaction 4 The compound is introduced into the first vaporizer at a constant speed, and heated and vaporized, and the temperature of heating and vapo...

Embodiment 2

[0035] Embodiment 2: the preparation method of micron carbonyl iron, nickel alloy powder, comprises the following steps:

[0036] A1: High pressure synthesis of Ni(co) 4 , put the nickel raw material into the first reaction kettle, feed CO gas with a purity of 99%, and prepare Ni(co) at a pressure of 11MPa and a temperature of 133°C. 4 compound; the nickel raw material is water-quenched nickel with a particle size of 3μm and a Ni content of 92%;

[0037] A2: High pressure synthesis of Fe(co) 5 , put the iron raw material into the second reactor, feed CO gas with a purity of 99%, and prepare Fe(co) at a pressure of 16MPa and a temperature of 150°C. 5 compound; the iron raw material is sponge iron with a particle size of 7μm and an oxygen content below 3.0%;

[0038] A3: Evaporation Ni(co) 4 , the liquid Ni(co) prepared by the reaction 4 The compound is introduced into the first vaporizer at a constant speed, and heated and vaporized, and the temperature of heating and vapo...

Embodiment 3

[0047] Embodiment 3: the preparation method of micron carbonyl iron, nickel alloy powder, comprises the following steps:

[0048] A1: High pressure synthesis of Ni(co) 4 , put the nickel raw material into the first reaction kettle, feed CO gas with a purity of 95%, and prepare Ni(co) at a pressure of 5MPa and a temperature of 150°C 4 compound; the nickel raw material is water-quenched nickel with a particle size of 1μm and a Ni content of 90%;

[0049] A2: High pressure synthesis of Fe(co) 5 , put the iron raw material into the second reactor, feed CO gas with a purity of 90%, and prepare Fe(co) at a pressure of 18MPa and a temperature of 120°C. 5 compound; the iron raw material is sponge iron with a particle size of 3ùm and an oxygen content below 3.0%;

[0050] A3: Evaporation Ni(co) 4 , the liquid Ni(co) prepared by the reaction 4 The compound is introduced into the first vaporizer at a constant speed, and heated and vaporized, and the temperature of heating and vapori...

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Abstract

The invention discloses a preparation method for micron-size carbonyl iron and nickel alloy powder. The preparation method for the micron-size carbonyl iron and nickel alloy powder comprises the following steps that A1, Ni(co)4 is subjected to high-pressure synthesis; A2, Fe(co)5 is subjected to high-pressure synthesis; A3, Ni(co)4 is subjected to evaporation and vaporization, and a liquid Ni(co)4 compound prepared through reacting is guided into a first vaporizer at the constant speed, heated and vaporized; A4, Fe(co)5 is subjected to evaporation and vaporization, and a liquid Ni(co)5 compound prepared through reacting is guided into a second vaporizer at the constant speed, heated and vaporized; A5, premixing is conducted, specifically, vaporized Fe(co)5, Ni(co)4 vapor and ammonia gas together enter a pre-mixer through carrier tape, the ratio of iron to nickel is adjusted, and the mixed gas in the pre-mixer is guided into a thermal decomposition furnace to be subjected to thermal decomposition and alloying; and A6, gas-solid separation is conducted, and the iron-nickel alloy powder is obtained. According to the preparation method for the micron-size carbonyl iron and nickel alloy powder, operation is easy, quantity production is easy to achieve, and the cost is low; and the prepared iron-nickel alloy powder has the advantages of being uniform in iron and nickel distribution, good in pressing performance and sintering performance and the like and has excellent comprehensive mechanical performance, and the tool service life is prolonged by 10%-20%.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a preparation method of micron-sized carbonyl iron and nickel alloy powder. Background technique [0002] The iron and nickel in powder metallurgy parts and wave-absorbing materials are generally prepared by single-adding and mixing. This method will easily lead to uneven distribution of iron and nickel content, segregation phenomenon, and affect the comprehensive mechanical properties of powder products and wave-absorbing materials. absorbing performance. At present, the main method for preparing iron-nickel alloy powder is the atomization method, but the main defect of this method is that the particle size is uneven, and the iron-nickel content of the particles is still significantly segregated, so it is not ideal. [0003] The iron and nickel alloy powder prepared by the carbonyl method has the characteristics of uniform distribution of iron and nickel, easy di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/30
CPCB22F9/305
Inventor 蔡兴明程群钟明信张军民
Owner JIANGYOU HEBAO NANO MATERIAL CO LTD