A kind of high-temperature chemical treatment process prepares the method for flaky Fesin alloy powder

A treatment process and high-temperature chemical technology, applied in the field of iron-based magnetic materials, can solve the problems of high energy consumption, long time of passing N2, low alloy N content, etc., and achieve the effect of low energy consumption, good effect and high N content

Active Publication Date: 2019-04-12
JIANGXI AITE MAGNETS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing FeSiN alloy powder preparation technology mainly adopts the N2 smelting method in molten iron, which has disadvantages such as long time for N2 passing, high energy consumption, and very low N content in the alloy.

Method used

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  • A kind of high-temperature chemical treatment process prepares the method for flaky Fesin alloy powder
  • A kind of high-temperature chemical treatment process prepares the method for flaky Fesin alloy powder
  • A kind of high-temperature chemical treatment process prepares the method for flaky Fesin alloy powder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: A kind of high-temperature chemical treatment process prepares the method for flaky FeSiN alloy powder as follows:

[0015] Step 1. Press Fe in the intermediate frequency furnace 95 Si 5 Proportion melting alloy liquid. The alloy liquid is poured at 1200~1350°C. The casting mold is a graphite plate with a thickness of 50 mm. The plate moves horizontally at a speed of 5cm / s. After pouring, the molten iron is cooled rapidly to obtain a plate-shaped ingot.

[0016] The plate-shaped ingot is pulverized by a pulverizer and sieved to obtain flake FeSi alloy powder with a particle size of 45-75 μm.

[0017] Step two, with non-toxic CO (NH 2 ) 2 , NaCl, BaCl 2 、Na 2 CO 3 , NaOH as raw material, by weight ratio CO(NH 2 ) 2 / NaCl / BaCl 2 / Na 2 CO 3 / NaOH = 50 / 20 / 8 / 30 / 8 ratio to prepare the reactant system, heated to 560°C in a corundum crucible, and the reactant system melted into a liquid state. Wrap the flaky FeSi alloy powder prepared in the fir...

Embodiment 2

[0021] Embodiment 2: A kind of high-temperature chemical treatment process prepares the method for flake FeSiN alloy powder as follows:

[0022] Step 1. Press Fe in the intermediate frequency furnace 90 Si 10 Proportion melting alloy liquid. The alloy liquid is poured at 1200~1350°C. The casting mold is a graphite plate with a thickness of 60mm. The plate moves horizontally at a speed of 10cm / s. After pouring, the molten iron is cooled rapidly to obtain a plate-shaped ingot. The plate-shaped ingot is pulverized by a pulverizer and sieved to obtain flake FeSi alloy powder with a particle size of 75-150 μm.

[0023] Step two, with non-toxic CO (NH 2 ) 2 , NaCl, BaCl 2 、Na 2 CO 3 , NaOH as raw material, by weight ratio CO(NH 2 ) 2 / NaCl / BaCl 2 / Na 2 CO 3 / NaOH = 55 / 25 / 10 / 35 / 10 to prepare the reactant system, heated to 590°C in a corundum crucible, and the reactant system melted into a liquid state. Wrap the flaky FeSi alloy powder prepared in the firs...

Embodiment 3

[0024] Embodiment 3: A kind of high-temperature chemical treatment process prepares the method for flaky FeSiN alloy powder as follows:

[0025] Step 1. Press Fe in the intermediate frequency furnace 90 Si 10 Proportion melting alloy liquid. The alloy liquid is poured at 1200~1350°C. The casting mold is a graphite plate with a thickness of 55mm. The plate moves horizontally at a speed of 1cm / s. After pouring, the molten iron is cooled rapidly to obtain a plate-shaped ingot. The plate-shaped ingot is pulverized by a pulverizer and sieved to obtain flake FeSi alloy powder with a particle size of 45-75 μm.

[0026] Step two, with non-toxic CO (NH 2 ) 2 , NaCl, BaCl 2 、Na 2 CO 3 , NaOH as raw material, by weight ratio CO(NH 2 ) 2 / NaCl / BaCl 2 / Na 2 CO 3 / NaOH = 45 / 15 / 5 / 25 / 5 ratio to prepare the reactant system, heated to 530°C in a corundum crucible, and the reactant system melted into a liquid state. Wrap the flaky FeSi alloy powder prepared in the fi...

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Abstract

The invention discloses a method for preparing sheet FeSiN alloy powder through a high-temperature chemical processing process. The preparing method includes the steps that (1) sheet FeSi alloy powder is prepared through intermediate frequency furnace smelting and a special casting technology, the powder ingredient scope is that Fe(100-x)Six(x=1wt%-15wt%); the powder with the grain size ranging from 45 micrometers to 75 micrometers and the powder with the grain size ranging from 75 micrometers to 150 micrometers enter a next step to be processed; and (2) non-toxic CO(NH2)2, NaCl, BaCl2, Na2CO3 and NaOH serve as raw materials, a reactant system is prepared according to the proportion that CO(NH2)2 / NaCl / BaCl2 / Na2CO3 / NaOH=(45-55) / (15-25) / (5-10) / (25-35) / (5-10), and the sheet FeSi alloy powder reacts for 0.5 h to 2 h in the reactant system with a temperature scope ranging from 530 DEG C to 590 DEG C to generate the sheet FeSiN alloy powder. The method adopting the high-temperature chemical processing process is used; and compared with an existing preparing method, the method is good in effect, process operation is convenient, the equipment requirement is low, and the outstanding beneficial effects of being efficient, small in energy consumption, high in N content in alloys and the like are achieved.

Description

technical field [0001] The invention belongs to the field of iron-based magnetic materials, in particular to a method for preparing flake-shaped FeSiN alloy powder by a high-temperature chemical treatment process. Background technique [0002] In 1972, Kim and Takahashi reported for the first time that α"-Fe16N2 had a "giant magnetic moment" phenomenon, and its saturation magnetization reached 2.8-3.0T, which attracted widespread attention. However, since α"-Fe16N2 is metastable, it is difficult to synthesize , and the temperature is higher than 200 ℃ will be decomposed into α-Fe and γ'-Fe4N, which greatly limits its application. However, ε-Fe3N or γ'-Fe4N is stable at room temperature. They not only have good corrosion resistance and wear resistance, but also have high saturation magnetization, magnetic permeability and low coercive force. research hotspot. [0003] The existing FeSiN alloy powder preparation technology mainly adopts the N2 smelting method in molten iron....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/04B22F9/16C22C38/02B22F1/00
CPCB22F1/0003B22F9/04B22F9/16C22C38/001C22C38/02
Inventor 朱正吼徐玉华朱小强
Owner JIANGXI AITE MAGNETS
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