Short-process efficient cold-rolling preparation method of high-silicon steel thin strip

Abstract

The invention aims at providing a short-process efficient cold-rolling preparation method of a high-silicon steel thin strip. The preparation method is characterized in that the high-silicon steel thin strip is prepared by using a rapid solidification method, and the thickness of the high-silicon steel thin strip is reduced by using a cold rolling method, the surface quality is improved, and the high-frequency magnetic performance is improved; due to rapid solidification, the plasticity of high-silicon steel can be improved, and the thin strip with certain plasticity is obtained and can be wound into a coil; then, cold rolling is carried out, so that the degree of order of the high-silicon steel is further lowered, the plasticity of the high-silicon steel is improved, and a high-silicon steel thin strip coil is obtained; the thin strip obtained through rapid solidification has the advantages that the crystal grain size is obviously reduced, the degree of order is obviously lowered, and the microhardness change is not great, so that next-step cold rolling is facilitated; during cold rolling, the rolling reduction of first-time rolling is controlled, and then, the plasticity is further improved, so that the thin strip with the thinnest thickness of 0.02mm can be obtained. According to the preparation method, the production efficiency of the prepared high-silicon steel thin strip is high, and the product quality of the prepared high-silicon steel thin strip is good, so that the method can be widely implemented industrially and accordingly has a broad application prospect.

Description

technical field

[0001] The invention is based on the technical field of metal material preparation, and relates to a fast, efficient and short-flow preparation method for high-silicon steel. technical background

[0002] High-silicon steel generally refers to silicon steel with a silicon content exceeding 3.5% (by weight, the same below). Compared with ordinary silicon steel (silicon content ≤ 3.5%), high-silicon steel, especially high-silicon steel containing 6.5% silicon, has higher resistivity and permeability, lower coercive force, and close to zero magnetic induction. The expansion coefficient and other characteristics, so it has low iron loss and magnetostriction, which is of great significance to reduce energy consumption and noise.

[0003] However, due to the increase in silicon content, the room temperature plasticity of high-silicon steel is very poor, and it is difficult to mass-produce this alloy sheet by traditional hot-cold and cold-rolling methods. Therefor...

Examples

Embodiment 1

[0020] The high-silicon steel thin strip is prepared by rapid solidification method, and its thickness is further reduced by cold rolling method, and the surface quality is improved to improve its high-frequency magnetic properties. During the cold rolling process, the reduction amount of the first rolling pass is controlled to further improve the plasticity, so that a thin strip with a thickness of 0.02 mm can be obtained. Its process route is as figure 1 shown.

[0021] The specific process flow is:

[0022] (1) Raw material preparation: use industrial pure iron (industrial pure iron DT0, iron content 99.5%) and crystalline silicon (purity 99.9%) as raw materials, and mix according to the ratio of silicon content 6.5wt.%.

[0023] (2) Rapid solidification stripping: heat and smelt the raw material, and in the molten liquid state, use the stripping method to rapidly solidify it to obtain a high-silicon steel thin strip with a thickness of 0.03mm.

[0024] (3) Cold rolling:...

Embodiment 2

[0027] The high-silicon steel thin strip is prepared by rapid solidification method, and its thickness is further reduced by cold rolling method, and the surface quality is improved to improve its high-frequency magnetic properties. During the cold rolling process, the reduction amount of the first rolling pass is controlled to further improve the plasticity, so that a thin strip with a thickness of 0.03 mm can be obtained. Its process route is as figure 1 As shown, its magnetic properties are as figure 2 shown.

[0028] (1) Raw material preparation: use industrial pure iron (industrial pure iron DT0, iron content 99.5%) and crystalline silicon (purity 99.9%) as raw materials, and mix according to the ratio of silicon content 6.5wt.%.

[0029] (2) Rapid solidification stripping: heat and smelt the raw material, and in the molten liquid state, use the stripping method to rapidly solidify it to obtain a high-silicon steel thin strip with a thickness of 0.05mm.

[0030] (3) C...

Embodiment 3

[0033] The high-silicon steel thin strip is prepared by rapid solidification method, and its thickness is further reduced by cold rolling method, and the surface quality is improved to improve its high-frequency magnetic properties. During the cold rolling process, the reduction amount of the first rolling pass is controlled to further improve the plasticity, so that a thin strip with a thickness of 0.05 mm can be obtained. Its process route is as figure 1 shown.

[0034](1) Raw material preparation: use industrial pure iron (industrial pure iron DT0, iron content 99.5%) and crystalline silicon (purity 99.9%) as raw materials, and mix according to the ratio of silicon content 6.5wt.%.

[0035] (2) Rapid solidification stripping: heat and smelt the raw material, and in the molten liquid state, use the stripping method to rapidly solidify it to obtain a high-silicon steel thin strip with a thickness of 0.06mm.

[0036] (3) Cold rolling: the alloy thin strip obtained by rapid s...

technical field

[0001] The invention is based on the technical field of metal material preparation, and relates to a fast, efficient and short-flow preparation method for high-silicon steel. technical background

[0002] High-silicon steel generally refers to silicon steel with a silicon content exceeding 3.5% (by weight, the same below). Compared with ordinary silicon steel (silicon content ≤ 3.5%), high-silicon steel, especially high-silicon steel containing 6.5% silicon, has higher resistivity and permeability, lower coercive force, and close to zero magnetic induction. The expansion coefficient and other characteristics, so it has low iron loss and magnetostriction, which is of great significance to reduce energy consumption and noise.

[0003] However, due to the increase in silicon content, the room temperature plasticity of high-silicon steel is very poor, and it is difficult to mass-produce this alloy sheet by traditional hot-cold and cold-rolling methods. Therefor...

Examples

Embodiment 1

[0020] The high-silicon steel thin strip is prepared by rapid solidification method, and its thickness is further reduced by cold rolling method, and the surface quality is improved to improve its high-frequency magnetic properties. During the cold rolling process, the reduction amount of the first rolling pass is controlled to further improve the plasticity, so that a thin strip with a thickness of 0.02 mm can be obtained. Its process route is as figure 1 shown.

[0021] The specific process flow is:

[0022] (1) Raw material preparation: use industrial pure iron (industrial pure iron DT0, iron content 99.5%) and crystalline silicon (purity 99.9%) as raw materials, and mix according to the ratio of silicon content 6.5wt.%.

[0023] (2) Rapid solidification stripping: heat and smelt the raw material, and in the molten liquid state, use the stripping method to rapidly solidify it to obtain a high-silicon steel thin strip with a thickness of 0.03mm.

[0024] (3) Cold rolling:...

Embodiment 2

[0027] The high-silicon steel thin strip is prepared by rapid solidification method, and its thickness is further reduced by cold rolling method, and the surface quality is improved to improve its high-frequency magnetic properties. During the cold rolling process, the reduction amount of the first rolling pass is controlled to further improve the plasticity, so that a thin strip with a thickness of 0.03 mm can be obtained. Its process route is as figure 1 As shown, its magnetic properties are as figure 2 shown.

[0028] (1) Raw material preparation: use industrial pure iron (industrial pure iron DT0, iron content 99.5%) and crystalline silicon (purity 99.9%) as raw materials, and mix according to the ratio of silicon content 6.5wt.%.

[0029] (2) Rapid solidification stripping: heat and smelt the raw material, and in the molten liquid state, use the stripping method to rapidly solidify it to obtain a high-silicon steel thin strip with a thickness of 0.05mm.

[0030] (3) C...

Embodiment 3

[0033] The high-silicon steel thin strip is prepared by rapid solidification method, and its thickness is further reduced by cold rolling method, and the surface quality is improved to improve its high-frequency magnetic properties. During the cold rolling process, the reduction amount of the first rolling pass is controlled to further improve the plasticity, so that a thin strip with a thickness of 0.05 mm can be obtained. Its process route is as figure 1 shown.

[0034](1) Raw material preparation: use industrial pure iron (industrial pure iron DT0, iron content 99.5%) and crystalline silicon (purity 99.9%) as raw materials, and mix according to the ratio of silicon content 6.5wt.%.

[0035] (2) Rapid solidification stripping: heat and smelt the raw material, and in the molten liquid state, use the stripping method to rapidly solidify it to obtain a high-silicon steel thin strip with a thickness of 0.06mm.

[0036] (3) Cold rolling: the alloy thin strip obtained by rapid s...

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