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Chromium-containing high silicon steel strip and preparation method thereof

A technology of high silicon steel and thin strip, applied in the field of high silicon steel thin strip, can solve problems such as unfavorable industrial production and complicated rolling process, and achieve the effects of wide applicability, reduction of impurity content, and wide application fields

Inactive Publication Date: 2013-09-04
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the patent does not involve the influence of Cr element on high silicon steel
In addition, the patent adopts the casting and rolling process for preparation, which is more complicated than the traditional rolling process, which is not conducive to industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A chromium-containing high-silicon steel thin strip and a preparation method thereof. The silicon content of the high silicon steel thin strip is 5.5-6.0wt%, the chromium content is 0.05-2.5wt%, and the rest is iron and unavoidable impurities.

[0030] The preparation method of chromium-containing high-silicon steel strip is:

[0031] (1) Raw material preparation: According to the chemical composition of the high-silicon steel strip, industrial pure iron, commercial silicon and pure chromium are used as raw material ingredients.

[0032] (2) Smelting: The raw materials are smelted in an intermediate frequency vacuum induction furnace, and cast into slabs at 1250°C~1380°C.

[0033] (3) Forging: Forging the billet into a slab with a thickness of 15~20mm at 800°C~950°C.

[0034] (4) Hot rolling: the slab is hot rolled into a thin strip with a thickness of 0.6~0.8mm at 700°C~880°C.

[0035] (5) Warm rolling: Warm rolling the thin strip to 0.2~0.3mm at 150°C~350°C to obta...

Embodiment 2

[0038] A chromium-containing high-silicon steel thin strip and a preparation method thereof. The silicon content of the high silicon steel thin strip is 5.8-6.5wt%, the chromium content is 2.4-5.0wt%, and the rest is iron and unavoidable impurities.

[0039] The preparation method of chromium-containing high-silicon steel strip is:

[0040] (1) Raw material preparation: According to the chemical composition of the high-silicon steel strip, industrial pure iron, commercial silicon and pure chromium are used as raw material ingredients.

[0041] (2) Smelting: The raw materials are smelted in an intermediate frequency vacuum induction furnace, and cast into slabs at 1350°C~1480°C.

[0042] (3) Forging: Forging the billet into a slab with a thickness of 15-20mm at 900°C~1050°C.

[0043](4) Hot rolling: the slab is hot rolled into a thin strip with a thickness of 0.6~0.8mm at 850°C~1050°C.

[0044] (5) Warm rolling: Warm rolling the thin strip to 0.2~0.3mm at 300°C~500°C to obta...

Embodiment 3

[0047] A chromium-containing high-silicon steel thin strip and a preparation method thereof. The silicon content of the high silicon steel thin strip is 6.2-6.8wt%, the chromium content is 4.8-7.5wt%, and the rest is iron and unavoidable impurities.

[0048] The preparation method of chromium-containing high-silicon steel strip is:

[0049] (1) Raw material preparation: According to the chemical composition of the high-silicon steel strip, industrial pure iron, commercial silicon and pure chromium are used as raw material ingredients.

[0050] (2) Smelting: The raw materials are smelted in an intermediate frequency vacuum induction furnace, and cast into slabs at 1450°C~1580°C.

[0051] (3) Forging: Forging the billet into a slab with a thickness of 10~16mm at 1000°C~1150°C.

[0052] (4) Hot rolling: the slab is hot-rolled into a thin strip with a thickness of 0.6-0.8mm at 1000°C~1180°C.

[0053] (5) Warm rolling: Warm rolling the thin strip to 0.2~0.3mm at 450°C~600°C to o...

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Abstract

The invention relates to a chromium-containing high silicon steel strip and a preparation method thereof. According to the technical scheme, the high silicon steel strip contains 5.5-7.0wt% of silicon and 0.05-10.0wt% of chromium, and the balance of iron and inevitable impurities. The preparation method comprises the following steps: preparing raw materials including technically pure iron, commercial silicon and pure chromium according to the chemical components of the chromium-containing high silicon steel strip; smelting the raw materials by employing an intermediate frequency vacuum induction furnace, casting into a casting blank under the condition of 1250-1650 DEG C, forging the casting blank into a plate blank with the thickness of 10-20mm under the condition of 800-1250 DEG C, and performing hot rolling on the plate blank to form a strip with the thickness of 0.6-0.8mm under the condition of 700-1250 DEG C; and finally, performing warm rolling till the thickness of the strip is 0.2-0.3mm under the condition of 1507-50 DEG C. The method has the characteristics of low cost, simple process and utilization of existing equipment, the brittleness of the prepared chromium-containing high silicon steel strip is obviously improved, the plasticity is obviously improved, and the plate shape is good.

Description

technical field [0001] The invention belongs to the technical field of high-silicon steel strips, and in particular relates to a chromium-containing high-silicon steel strip and a preparation method thereof. technical background [0002] Silicon steel usually refers to 0.2~6.5wt% iron-silicon alloy, its carbon content is very low (generally less than 0.02wt%), it is mainly used as the iron core of various motors and transformers, and it is indispensable in electric power, electronics and military industries. Missing important soft magnetic alloys. Silicon steel is used in the largest amount among magnetic materials, and it is also an important metal functional material for energy saving. [0003] High silicon steel generally refers to 4.5~6.7wt% Si iron-silicon alloy, and usually refers to 6.5wt% Si iron-silicon alloy. Studies have shown that as the silicon content increases, the iron loss of the silicon steel sheet decreases and the magnetic induction increases. When the ...

Claims

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Application Information

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IPC IPC(8): C21D8/12C22C38/34C21C5/52
Inventor 刘静陈文思程朝阳林希峰甘章华向志东
Owner WUHAN UNIV OF SCI & TECH
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