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Slag system for smelting fe-ni soft magnetic alloy containing ce and using method thereof

A soft magnetic alloy, slag system technology, applied in the direction of magnetic objects, magnetic materials, circuits, etc., can solve problems such as burning of Ce element

Active Publication Date: 2022-03-22
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Fe-Ni soft magnetic alloys containing rare earth Ce have certain problems in smelting, that is, the burning loss of Ce elements and other easily oxidizable elements in the alloy after secondary refining by electroslag remelting, so it is necessary to develop new electroslag remelting process to solve this problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The composition of the slag system used to smelt Ce-containing Fe-Ni soft magnetic alloy contains 22% CaO, Al 2 o 3 20%, NaF 6%, MoO 2 2%, MgO 4%, CeO 2 5%, SiO 2 1%, CaF 2 40%;

[0038] The method of use is:

[0039] The slag used to smelt the Fe-Ni soft magnetic alloy containing Ce is pre-melted at 1450±5°C for 15 minutes, then air-cooled to room temperature and crushed to make pre-melted slag block;

[0040] Heat the pre-melted slag block to 600±5°C and bake for 3 hours, then cool to room temperature with the furnace to make pre-melted slag;

[0041] Lay alloy shavings on the dummy plate, the alloy shavings are located at the projection of the consumable electrode on the dummy plate, the thickness of the alloy shavings is 40mm; at the same time, lay fluorite powder and fluorite powder in the space between the alloy shavings and the inner wall of the crystallizer The laying thickness is 7mm; the composition of the alloy shavings is the same as that of the con...

Embodiment 2

[0049] The composition of the slag system used to smelt Ce-containing Fe-Ni soft magnetic alloy contains 27% CaO, Al 2 o 3 10%, NaF 4%, MgO 3%, CeO 2 3%, SiO 2 2%, CaF 2 51%;

[0050] Method is with embodiment 1, and difference is:

[0051] (1) Bake the pre-melted slag block for 6 hours;

[0052] (2) The laying thickness of alloy shavings is 30mm, and the laying thickness of fluorite powder is 5mm;

[0053] (3) The inner diameter of the crystallizer used is 0.15m, and the amount of pre-melted slag added = 1250×D 3 =4.22kg;

[0054] (4) When adding aluminum particles, add it every 3 minutes; the amount of aluminum particles added is added according to 0.2% of the mass of the consumable electrode melted within 3 minutes;

[0055] (5) The consumable electrode is divided into three types; the composition of the first type contains Fe 13%, Mo 6.2%, Si 0.3%, Mn 1%, Ce 0.0205% by mass percentage, and the balance is Ni and Avoid impurities, unavoidable impurities: S 0.0033...

Embodiment 3

[0059] The slag system used to smelt Fe-Ni soft magnetic alloy containing Ce is divided into three types; the composition of the first slag system contains 25% CaO, Al 2 o 3 20%, NaF 4%, MgO 5%, CeO 2 3%, SiO 2 1%, CaF 2 42%; the composition of the second slag system contains 22% CaO, Al 2 o 3 10%, NaF 5%, MoO 2 1%, MgO 4%, CeO 2 10%, SiO 2 1%, CaF 2 47%; the composition of the third slag system contains 19% CaO, Al 2 o 3 22%, NaF 6%, MoO 2 2%, MgO 3%, CeO 2 15%, SiO 2 2%, CaF 2 31%;

[0060] Method is with embodiment 1, and difference is:

[0061] (1) Bake the pre-melted slag block for 5 hours;

[0062] (2) The laying thickness of alloy shavings is 50mm, and the laying thickness of fluorite powder is 10mm;

[0063] (3) The inner diameter of the crystallizer used is 0.15m, and the amount of pre-melted slag added = 1000×D 3 =3.38kg;

[0064] (4) When adding aluminum particles, add it every 5 minutes; the amount of aluminum particles added is added...

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Abstract

The slag system used for smelting Fe-Ni soft magnetic alloy containing Ce and its use method, the composition contains 15-27% of CaO and Al by mass percentage 2 o 3 10-22%, NaF 4-6%, MoO 2 0~2%, MgO 3~5%, CeO 2 3~15%, SiO 2 1~2%, the balance is CaF 2 The method is: (1) pre-melting the slag used for smelting Fe-Ni soft magnetic alloy containing Ce at 1450±5°C, and then crushing; (2) baking the pre-melted slag block at 600±5°C Pre-melting slag; (3) laying alloy chips on the dummy plate, and laying fluorite powder in the space between the alloy chips and the inner wall of the crystallizer; (4) under the condition of argon atmosphere, lower the consumable electrode to start the arc, Add the pre-melted slag into the crystallizer for slag melting; (5) After the slag melting is completed, a slag pool is formed and electroslag remelting is carried out. The slag system of the present invention can solve the problem of burning loss of elements such as Ce and Mo in the process of electroslag remelting and smelting Fe-Ni alloy containing rare earth Ce, and the prepared Fe-Ni soft magnetic alloy containing Ce has good composition quality and element distribution uniform.

Description

technical field [0001] The invention is in the technical field of metallurgy, and in particular relates to a slag system for smelting Ce-containing Fe-Ni soft magnetic alloy and its application method. Background technique [0002] Soft magnetic material is a magnetic material with high magnetic permeability and small demagnetization factor. It can be magnetized rapidly in a weak magnetic field, and the demagnetization speed is fast after the external magnetic field is removed. Therefore, the coercive force and remanence are far lower than those of rare earth permanent magnets and iron. magnet. There are many kinds of soft magnetic alloys, and they have a wide range of applications, especially in the fields of magnetic recording, magnetic shielding, and transformers, which cannot be replaced by other magnetic materials; Fe-Ni soft magnetic alloy is one of the commonly used soft magnetic materials. [0003] The main factors affecting the magnetic properties of soft magnetic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B9/18C22C19/03C22C38/12C22C38/02C22C38/04C22C38/08H01F1/147
CPCC22B9/18C22C19/03C22C38/12C22C38/02C22C38/04C22C38/005C22C38/08H01F1/14708C22C2202/02
Inventor 董艳伍姚科安姜周华李毓硕杜书扬
Owner NORTHEASTERN UNIV LIAONING
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