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A kind of soft magnetic high-silicon steel ultra-thin strip and its preparation method

A high-silicon steel, ultra-thin strip technology, applied in solid-state diffusion coating, coating, and devices for coating liquid on the surface, etc. problem, to achieve the effect of excellent ductility, good mechanical properties, high magnetic induction iron loss

Active Publication Date: 2022-06-21
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high-silicon steel prepared by the current rapid solidification technology has poor magnetic properties, difficult control of grain size, and increased iron loss, which cannot meet the requirements for use in high-performance motors.

Method used

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  • A kind of soft magnetic high-silicon steel ultra-thin strip and its preparation method
  • A kind of soft magnetic high-silicon steel ultra-thin strip and its preparation method
  • A kind of soft magnetic high-silicon steel ultra-thin strip and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A preparation method of a soft magnetic high silicon steel ultra-thin strip, comprising the following steps:

[0036] a. Take high-silicon steel parent alloy, niobium-iron alloy and cobalt-iron-silicon alloy as raw materials for preparing the soft magnetic high silicon steel ultra-thin strip, and make the raw materials meet the following alloying element mass percentages:

[0037] C: 0.006%, Si: 6.5%, Mn: 0.15%, S: 0.025%, Nb: 0.04%, Co: 0.28%, P: 0.003%, N: 0.009% and the balance of Fe;

[0038] b. First add the high-silicon steel base alloy into the high-vacuum arc melting furnace, and smelt at 1150 ° C. After the high-silicon steel base alloy is safely melted, smelt 3 times repeatedly. The cobalt-iron-silicon alloy continues to be smelted, and the smelting temperature is 1100 °C, and smelting is repeated for 3; then the high-silicon steel thin strip precursor is prepared by using a single vacuum roll (copper roll) strip, wherein the surface line speed of the copper r...

Embodiment 2

[0044] A preparation method of a soft magnetic high silicon steel ultra-thin strip, comprising the following steps:

[0045] a. Take high-silicon steel parent alloy, niobium-iron alloy and cobalt-iron-silicon alloy as raw materials for preparing the soft magnetic high silicon steel ultra-thin strip, and make the raw materials meet the following alloying element mass percentages:

[0046] C: 0.005%, Si: 6.2%, Mn: 0.12%, S: 0.02%, Nb: 0.02%, Co: 0.23%, P: 0.004%, N: 0.008% and the balance of Fe;

[0047] b. First add the high-silicon steel base alloy into the high-vacuum arc melting furnace, and smelt at 1190 ° C. After the high-silicon steel base alloy is safely melted, smelt 4 times repeatedly. The cobalt-iron-silicon alloy continued to be smelted at a temperature of 1150°C and smelted 4 times; then the high-silicon steel thin strip precursor was prepared by stripping a single vacuum roll (copper roll), wherein the surface speed of the copper roll was 30m / s, the degree of va...

Embodiment 3

[0053] A preparation method of a soft magnetic high silicon steel ultra-thin strip, comprising the following steps:

[0054] a. Take high-silicon steel parent alloy, niobium-iron alloy and cobalt-iron-silicon alloy as raw materials for preparing the soft magnetic high silicon steel ultra-thin strip, and make the raw materials meet the following alloying element mass percentages:

[0055] C: 0.0065%, Si: 6.9%, Mn: 0.18%, S: 0.03%, Nb: 0.05%, Co: 0.32%, P: 0.003%, N: 0.01% and balance Fe;

[0056] b. First add the high-silicon steel base alloy into the high-vacuum arc melting furnace, and smelt at 1250 ° C. After the high-silicon steel base alloy is safely melted, smelt 5 times repeatedly. The cobalt-iron-silicon alloy continued to be smelted at a temperature of 1200°C, and smelted 5 times; and then the high-silicon steel thin strip precursor was prepared by stripping with a single vacuum roll (copper roll), wherein the surface speed of the copper roll was 40m / s, the degree of...

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Abstract

The invention relates to the technical field of preparation of silicon steel strips, and specifically discloses a soft magnetic high-silicon steel ultra-thin strip and a preparation method thereof. The preparation method of the soft magnetic high-silicon steel ultra-thin strip includes melting, coating CaF 2 and TiB 2 Coupling coating, microwave thermoforming, pickling, nitriding, primary annealing, three hot rolling, secondary annealing, three warm rolling and three annealing. The ultra-thin soft magnetic high-silicon steel strip prepared by the method for preparing the ultra-thin soft magnetic high-silicon steel strip provided by the present invention has a high degree of grain refinement and a uniform structure, which changes the traditional phase precipitation path and effectively eliminates the formation of ordered phases. Formed so that it has excellent ductility, and has higher magnetic induction and lower iron loss.

Description

technical field [0001] The invention relates to the technical field of preparation of silicon steel strips, in particular to a soft magnetic high silicon steel ultra-thin strip and a preparation method thereof. Background technique [0002] Fe-6.5wt%Si high-silicon steel has high resistivity and good saturation magnetization, and has become a popular choice for the manufacture of generators, variable frequency motors, high-frequency transformers, choke coils and high-frequency magnetic shielding, as well as other electrical instruments and telecommunication fields. A popular soft magnetic material. Meanwhile, Fe-6.5wt%Si high-silicon steel also has the potential to reduce noise during motor operation, which is mainly attributed to its excellent soft magnetic properties, such as low iron loss, high permeability, and low magnetostriction coefficient. However, due to the increase of silicon content in Fe-6.5wt% Si high-silicon steel, its mechanical properties are deteriorated,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/06C22C38/00C22C38/02C22C38/04C22C38/10C22C38/12C23C8/26C23G3/02B05D7/14B22D11/06C21D8/02
Inventor 张迪苏莹涛王波孙会兰朱立光郭志红
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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