Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing nanoscale FeCrCo magnetic material with regular orientation through magnetic field

A magnetic material, nano-scale technology, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., to achieve the effect of refining grains, inhibiting coarsening, and promoting interaction

Active Publication Date: 2016-03-30
NORTHEASTERN UNIV
View PDF1 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of the present invention, the characteristics that FeCrCo alloy can form texture in the process of directional solidification, and the characteristics that magnetic field can enhance the texture of FeCrCo alloy are proposed to first form texture by directional solidification under strong magnetic field , and then applying a magnetic field in the annealing and tempering stages enhances the alloy's easy magnetization direction texture and improves the morphology of nanoparticles. This preparation idea has not been reported

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing nanoscale FeCrCo magnetic material with regular orientation through magnetic field
  • Method for preparing nanoscale FeCrCo magnetic material with regular orientation through magnetic field

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The method for preparing a nanoscale FeCrCo magnetic material with regular orientation by using a magnetic field, specifically comprises the following steps:

[0038] Step 1, vacuum melting FeCrCo master alloy ingot:

[0039] According to the mass percentage of FeCrCo magnetic material: 25% Cr, 12% Co and 63% Fe, using industrial pure iron, pure cobalt and pure chromium as raw materials, vacuum induction melting is adopted, and the vacuum degree is 2×10 -2 Pa, made Fe-25Cr-12Co master alloy ingot;

[0040] Step 2, directional solidification under a steady magnetic field;

[0041] (1) Inductively heat the master alloy ingot to 1600°C for 5 minutes;

[0042] (2) Place the master alloy ingot in a stable magnetic field, wherein the direction of the magnetic field is parallel to the direction of the directional solidification pulling speed, the magnetic field strength is 1T, and it is pulled into the Ga-In-Sn liquid pool at a speed of 20um / s, and the pulling speed is The di...

Embodiment 2

[0055] The method for preparing a nanoscale FeCrCo magnetic material with regular orientation by using a magnetic field, specifically comprises the following steps:

[0056] Step 1, vacuum melting FeCrCo master alloy ingot:

[0057] According to the mass percentage of FeCrCo magnetic material: 25% Cr, 12% Co and 63% Fe, using industrial pure iron, pure cobalt and pure chromium as raw materials, vacuum induction melting is adopted, and the vacuum degree is 2×10 -2 Pa, made Fe-25Cr-12Co master alloy ingot;

[0058] Step 2, directional solidification under a steady magnetic field;

[0059] (1) Inductively heat the master alloy ingot to 1600°C for 6 minutes;

[0060] (2) The master alloy ingot is placed in a steady magnetic field, wherein the direction of the magnetic field is parallel to the direction of the directional solidification pulling speed, the magnetic field strength is 6T, and it is pulled into the Ga-In-Sn liquid pool at a speed of 50um / s. The direction is set as t...

Embodiment 3

[0072] The method for preparing a nanoscale FeCrCo magnetic material with regular orientation by using a magnetic field, specifically comprises the following steps:

[0073] Step 1, vacuum melting FeCrCo master alloy ingot:

[0074] According to the mass percentage of FeCrCo magnetic material: 25% Cr, 12% Co and 63% Fe, using industrial pure iron, pure cobalt and pure chromium as raw materials, vacuum induction melting is adopted, and the vacuum degree is 2×10 -2 Pa, made Fe-25Cr-12Co master alloy ingot;

[0075] Step 2, directional solidification under a steady magnetic field;

[0076] (1) Induction heating the master alloy ingot to 1600°C for 7 minutes;

[0077] (2) The master alloy ingot is placed in a steady magnetic field, wherein the direction of the magnetic field is parallel to the direction of the directional solidification pulling speed, the magnetic field strength is 6T, and it is pulled into the Ga-In-Sn liquid pool at a speed of 100um / s. The direction is set as...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing a nanoscale FeCrCo magnetic material with regular orientation through a magnetic field, and belongs to the field of magnetic materials. The method comprises the following steps that firstly, a FeCrCo mother alloy ingot is smelted in a vacuum manner; secondly, controlled directional solidification is achieved under the steady-state magnetic field, wherein an alloy is placed in the steady-state magnetic field with the magnetic field direction parallel to the controlled directional solidification drawing speed direction after being heated and molten to be subjected to heat preservation, and then is pulled to a Ga-In-Sn liquid pool; thirdly, solid-liquid treatment is carried out; fourthly, annealing under the steady-state magnetic field is achieved, wherein the alloy ingot is placed in the magnetic field and heated to be subjected to heat preservation; and fifthly, step-tempering under the steady-state magnetic field is achieved, wherein the alloy ingot is placed in the magnetic field, step-tempering is carried out, furnace cooling to the room temperature is carried out, and the nanoscale FeCrCo magnetic material with regular orientation is obtained. The prepared FeCrCo magnetic material has the higher <001> texture; and in all preparing stages, orientation and refining effects of the strong magnetic field are adopted, the nano magnetic particles are greatly refined and drawn out, and the magnetic performance of the product is improved, wherein the coercive force reaches 710 Oe -819.42 Oe, and the remaining magnetization intensity reaches 120 emu / g -178.86 emu / g.

Description

technical field [0001] The invention belongs to the field of magnetic materials, in particular to a method for preparing nanoscale FeCrCo magnetic materials with regular orientation by using a magnetic field. Background technique [0002] FeCrCo is a widely used permanent magnet alloy. Its advantage is that it is easy to carry out metal processing and make precise components. It is mainly used in key parts such as high-speed motors, integrated power supplies, main propulsion engines and non-contact magnetic bearings, but its disadvantages are Compared with rare earth magnetic materials, the magnetic properties are lower. With the development of science and technology, the use conditions of related equipment have continuously put forward higher requirements on the magnetic properties of components. Therefore, it is of great practical value to invent a new preparation process and improve the magnetic properties of the alloy. [0003] In recent years, with the improvement of m...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/30C22C38/22C22C38/34C22C30/00B22D27/02C21D6/00C21D1/04H01F1/047
CPCB22D27/02C21D1/04C21D6/002C22C30/00C22C38/22C22C38/30C22C38/34H01F1/047
Inventor 张林王恩刚项兆龙左小伟贾鹏
Owner NORTHEASTERN UNIV