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A kind of production method of thin-gauge oriented silicon steel strip

A technology of silicon steel strip and production method, which is applied in the field of production of thin-gauge oriented silicon steel strip, can solve the problems of affecting operation rate and hourly output, difficulty of oriented silicon steel sheet, high brittleness of silicon steel sheet, etc., and achieve omission of normalization treatment process , Improve product quality, grain growth and strong effect

Active Publication Date: 2020-04-03
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the thickness of oriented silicon steel cold-rolled strips produced by conventional processes is 0.30mm~0.35mm. Due to the high brittleness of silicon steel sheets, it brings great difficulties to cold-rolled thin-gauge oriented silicon steel sheets, and cracks, broken strips, and roll wrapping often occur. Accidents affect the operating rate and hourly output, and also affect the cost, and lead to low magnetic performance and unstable products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The production method of the thin-gauge oriented silicon steel sheet strip in this embodiment includes warm rolling of oriented silicon steel hot-rolled sheet, decarburization annealing of warm-rolled sheet, and cold-rolling process of decarburization annealed sheet, and the specific process steps are as follows:

[0017] (1) Warm rolling process of oriented silicon steel hot-rolled sheet: Put the 2.2mm thick oriented silicon steel hot-rolled sheet into the heating furnace, heat the sample to 500°C with the furnace, and carry out warm rolling after holding for 5 minutes. The total reduction ratio of rolling is is 77%, and the thickness of the warm-rolled plate is 0.5mm;

[0018] (2) Decarburization annealing process of warm-rolled plate: put the warm-rolled plate into the annealing furnace for decarburization annealing, and the atmosphere in the furnace is controlled to 80%H 2 +20%N 2 , the temperature was raised to 860°C at a rate of 20°C / s, and after holding for 12 m...

Embodiment 2

[0022] The production method of the thin-gauge oriented silicon steel sheet strip in this embodiment includes warm rolling of oriented silicon steel hot-rolled sheet, decarburization annealing of warm-rolled sheet, and cold-rolling process of decarburization annealed sheet, and the specific process steps are as follows:

[0023] (1) Warm rolling process of oriented silicon steel hot-rolled sheet: Put the 2.2mm thick oriented silicon steel hot-rolled sheet into the heating furnace, heat the sample to 520°C with the furnace, keep warm for 4.5min and then carry out warm rolling, the total rolling pressure is reduced The ratio is 55%, and the thickness of the warm-rolled plate is 1.0mm;

[0024] (2) Decarburization annealing process of warm-rolled plate: put the warm-rolled plate into the annealing furnace for decarburization annealing, and the atmosphere in the furnace is controlled to 80%H 2 +20%N 2 , the temperature was raised to 865°C at a rate of 22°C / s, and after holding fo...

Embodiment 3

[0028] The production method of the thin-gauge oriented silicon steel sheet strip in this embodiment includes warm rolling of oriented silicon steel hot-rolled sheet, decarburization annealing of warm-rolled sheet, and cold-rolling process of decarburization annealed sheet, and the specific process steps are as follows:

[0029] (1) Warm rolling process of oriented silicon steel hot-rolled sheet: Put the 2.6mm thick oriented silicon steel hot-rolled sheet into the heating furnace, heat the sample to 540°C with the furnace, and carry out warm rolling after holding for 4 minutes. The total reduction ratio of rolling is is 80%, and the thickness of the warm-rolled plate is 1.0mm;

[0030] (2) Decarburization annealing process of warm-rolled plate: put the warm-rolled plate into the annealing furnace for decarburization annealing, and the atmosphere in the furnace is controlled to 80%H 2 +20%N 2 , the temperature was raised to 895°C at a rate of 30°C / s, and after holding for 6 mi...

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Abstract

The invention discloses a production method of a thin-gauge plate oriented silicon steel plate strip. The method comprises the processes of oriented silicon steel hot-rolling plate warm rolling, warm-rolling plate decarburizing annealing and decarburizing annealing plate cold rolling; in the oriented silicon steel hot-rolling plate warm rolling process, the thick oriented silicon steel hot-rollingplate with the thickness of 2.2 to 2.6 mm is placed in a heating furnace, a test sample is heated to 500 to 600 DEG C along with a furnace, heat preservation is conducted for 2 to 5 minutes, the warm-rolling total reduction rate is greater than or equal to 55 percent, and the thickness of the warm-rolling plate is 0.5 to 1.0 mm. According to the production method of the thin-gauge plate orientedsilicon steel plate strip, the thickness of the oriented silicon steel finished product is 0.15 to 0.25 mm, the iron loss P1.7 of the product is less than or equal to 1.234 ww / kg, the magnetic induction B8 is greater than or equal to 1.876 T, the advantages of capability of saving cost, stable magnetic property, low iron loss and the like are achieved, economic benefits can be brought to enterprises, and the energy-saving effect for the production process of the products and the use of the products is remarkable.

Description

technical field [0001] The invention belongs to the technical field of metal material preparation, and in particular relates to a production method of a thin-gauge oriented silicon steel strip. Background technique [0002] Oriented silicon steel is an indispensable soft magnetic material in the fields of electronics, electrical engineering and military affairs. It is widely used in the iron cores of various transformers and large generators due to its excellent magnetic properties. Oriented silicon steel is characterized by highly oriented {110}<001> orientation, ie, Gaussian orientation grains, and is the only steel product that obtains high orientation Gaussian texture and excellent magnetic properties through secondary recrystallization. With the large-scale power construction in my country, the demand for high-quality grain-oriented silicon steel used as transformer core material has greatly increased. [0003] With the development of the electronics industry, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D8/12C21D3/04C21D1/74C21D1/26
CPCC21D1/26C21D1/74C21D3/04C21D8/1227C21D8/1233C21D8/1255
Inventor 冯运莉宋卓斐王黎光李杰郭婧齐雪京杭子迪王坤宇段阳会
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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