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Preparation method of spherical Fe-Ni alloy powder

A technology of alloy powder and pre-alloy powder, which is applied in the field of preparation of spherical Fe-Ni alloy powder, can solve the problems of low cost and mass production, and achieve the effects of good fluidity, low loss and good sphericity

Inactive Publication Date: 2018-09-25
HAIAN INST OF HIGH TECH RES NANJING UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the reported Fe-Ni alloys are nanomaterials prepared under laboratory conditions, which are difficult for low-cost, high-volume production
At present, in addition to the gas atomization method, there are few reports on the use of other methods to obtain spherical Fe-Ni alloy powders.

Method used

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  • Preparation method of spherical Fe-Ni alloy powder

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Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1, prepare spherical Fe 50 Ni 50 Alloy powder

[0022] S1 Preparation of precursor powder: according to Fe 50 Ni 50 Chemical formula ratio, slowly add the weighed iron nitrate (AR, 99.9%) and nickel nitrate (AR, 99.9%) into the distilled water, and keep stirring with a glass rod to mix evenly, slowly add the weighed NaOH into the distilled water, And use a glass rod to continuously stir and mix evenly, quickly add the sodium hydroxide solution to the nitrate solution, use a mechanical stirrer to continuously stir to make it fully react, obtain mixed metal oxides by precipitation, and vacuum filter the mixed metal oxides Machine suction filtration, and repeated washing with distilled water, the washed powder is placed in an oven to dry, and the precursor powder is obtained after cooling;

[0023] S2 Preparation of pre-alloyed powder: Put the above precursor powder and NaCl in a mechanical stirring device at a mass ratio of 1:3 and disperse for about 30 min...

Embodiment 2

[0026] Embodiment 2, prepare spherical Fe 40 Ni6 0 Alloy powder

[0027] S1 Preparation of precursor powder: according to Fe 40 Ni 60Chemical formula ratio, slowly add the weighed iron sulfate (AR, 99.9%) and nickel sulfate (AR, 99.9%) into the distilled water, and keep stirring with a glass rod to mix evenly, slowly add the weighed ammonium oxalate into the distilled water , and use a glass rod to continuously stir and mix evenly, quickly add the ammonium oxalate solution to the sulfate solution, use a mechanical stirrer to continuously stir to make it fully react, obtain mixed metal oxides by precipitation, and vacuum filter the mixed metal oxides Machine suction filtration, and repeated washing with distilled water, the washed powder is placed in an oven to dry, and the precursor powder is obtained after cooling;

[0028] S2 Preparation of pre-alloyed powder: Put the above precursor powder and NaCl in a mechanical stirring device at a mass ratio of 1:3 and disperse for ...

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Abstract

The invention discloses a preparation method of spherical Fe-Ni alloy powder. The preparation method comprises the following steps: S1, preparing precursor powder; S2, preparing pre-alloy powder; andS3, preparing spherical Fe-Ni alloy powder. The preparation method disclosed by the invention has the advantages that the spherical Fe-Ni alloy powder is synthesized simply and effectively, the prepared alloy powder is compact in particle and free of pores and bulk inclusions, and Fe and Ni are uniformly distributed.

Description

technical field [0001] The application relates to the technical field of powder metallurgy, in particular to a method for preparing spherical Fe-Ni alloy powder. Background technique [0002] Due to the enhancement effect of soft magnetic alloys and their compounds in electronic and energy conversion devices, they have been used more and more widely. Iron-nickel alloy has excellent characteristics of high magnetic permeability, high saturation magnetic induction and low coercive force. In recent years, in order to effectively reduce eddy current loss, we have been devoting ourselves to manufacturing soft magnetic powder cores by powder metallurgy process. As an electromagnetic device under high frequency, the internal structure of the magnetic powder core can be divided into several small units through insulating coating. However, against the undesirability of edge and corner powder, insulating cladding can increase core losses. Therefore, spherical alloy powder will be a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/22B22F1/00
CPCB22F9/22B22F1/065B22F1/142
Inventor 雷成龙涂巍巍唐红哲唐少龙都有为
Owner HAIAN INST OF HIGH TECH RES NANJING UNIV