A method for producing high magnetic induction grain-oriented silicon steel based on ESP endless rolling technology

A technology of high magnetic induction orientation and endless rolling, which is applied in the field of producing high magnetic induction orientation silicon steel based on ESP endless rolling technology, can solve the problems that the research of high magnetic induction orientation silicon steel has not been reported yet, and achieve the omission of nitriding process , reduce roll loss and simplify the heating process

Active Publication Date: 2020-05-12
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there have been reports on the production of low-carbon steel by ESP process in China, but the research on the production of high magnetic induction grain-oriented silicon steel by ESP process has not been reported yet.

Method used

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  • A method for producing high magnetic induction grain-oriented silicon steel based on ESP endless rolling technology
  • A method for producing high magnetic induction grain-oriented silicon steel based on ESP endless rolling technology
  • A method for producing high magnetic induction grain-oriented silicon steel based on ESP endless rolling technology

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Experimental program
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Effect test

Embodiment 1

[0060] Composition of grain-oriented silicon steel (by mass percentage) C: 0.06%, Si: 3.1%, Mn: 0.09%, S: 0.015%, Al: 0.03%, N: 0.006%, the rest is iron and inevitable inclusions, orientation The manufacturing process of silicon steel is as follows: After the molten steel is smelted, the thin slab continuous casting machine is used to produce a 90mm cast slab, which is heated to 1380°C by an electromagnetic induction heating furnace, rough rolled to a 20mm intermediate slab, and the temperature at the entrance of the finish rolling unit is 1230°C to be rolled to 2mm. , The final rolling temperature is about 1050°C. Cooling is carried out through the laminar flow cooling section, the laminar flow cooling rate is 60°C / s, and the coiling temperature of the hot-rolled steel strip is 570°C. The hot-rolled sheet is subjected to normalization treatment, the normalization system is 1100°C (20s) + 900 (180s), pickled in 3% HCl for 60s; cold-rolled to 0.18mm, the total deformation is 91...

Embodiment 2

[0062] Oriented silicon steel composition (by mass percentage) C: 0.055%, Si: 3.0%, Mn: 0.08%, S: 0.015%, Al: 0.02%, N: 0.015%, the rest is iron and inevitable inclusions; orientation The manufacturing process of silicon steel is as follows: After the molten steel of the above components is smelted, a thin slab continuous casting machine is used to produce a 100mm thick casting slab, which is heated to 1350°C by an electromagnetic induction heating furnace, rough rolled to a 20mm intermediate slab, and the temperature at the entrance of the finishing rolling unit is 1210°C. Rolled to 2.5mm, the final rolling temperature is about 1000 ℃. The laminar cooling rate is 70°C / s, and the coiling temperature of the hot-rolled steel strip is 550°C. The hot-rolled sheet is subjected to normalization treatment, the normalization system is 1050°C (30s) + 900 (150s), pickled in 3% HCl for 60s; after that, it is cold-rolled to 0.23mm by 7 passes, and the total reduction is 91%. The temperat...

Embodiment 3

[0064] Grain-oriented silicon steel composition (by mass percentage) C: 0.06%, Si: 3.1%, Mn: 0.1%, S: 0.02%, Al: 0.04%, N: 0.015%, the rest is iron and inevitable inclusions, orientation The manufacturing process of silicon steel is as follows: After the molten steel is smelted, the thin slab continuous casting machine is used to produce a 100mm cast slab, which is heated to 1320°C by an electromagnetic induction heating furnace, the temperature at the entrance of the finishing rolling unit is 1180°C, the final rolling temperature is 960°C, and rolled to 2.5 mm, cooling through the laminar cooling section, the laminar cooling rate is 60°C / s, and the coiling temperature of the hot-rolled steel strip is 520°C. The hot-rolled sheet is subjected to normalization treatment, the normalization system is 1100°C (15s) + 900 (180s), pickled in 3% HCl for 60s; after that, it is cold-rolled to 0.3mm by 7 passes, the total deformation is 88%, and the sheet temperature The temperature is co...

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Abstract

The invention discloses a method for producing high magnetic induction orientated silicon steel based on an ESP endless rolling technology. The method particularly comprises the following steps: thinslab continuous casting, rough rolling, induction furnace heating, finish rolling, laminar flow cooling, cold rolling, decarbonization treatment and high temperature annealing. The method is characterized in that a brand-new short process method is used for producing orientated silicon steel, and compared with a traditional orientated silicon steel high temperature heating manufacturing process, the heating process is simplified; compared with a current popular low temperature heating process, the nitriding process is omitted. An ESP production line is used for producing a hot rolled plate, continuous casting and rolling can be directly connected in series, the production efficiency is improved, head and tail cutting can be significantly reduced, and the production cost can be greatly reduced. At the same time, the full endless thin slab continuous casting and rolling process (ESP) avoids the process fluctuation caused by threading and tail flick stages of a classical process, and thephysical and mechanical property stability of strip coils are ensured.

Description

technical field [0001] The present invention relates to the technical field of production of oriented silicon steel. The main technical feature is that the heating and hot rolling process in the classic high-temperature oriented silicon steel production process is replaced by the characteristics of the full endless thin slab continuous casting and rolling process (ESP, Endless strip production). It omits the high-temperature heating slab step in the classic production process, greatly reduces production costs and reduces the trimming of the steel strip, improves production efficiency, and ensures the uniformity of the steel strip performance. According to this process, high magnetic induction oriented silicon steel with excellent performance can be produced. [0002] technical background [0003] Oriented silicon steel can be divided into common oriented silicon steel (CGO) and high magnetic induction oriented silicon steel (Hi-B) according to the advantages and disadvantages...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D8/12C22C38/00C22C38/02C22C38/04C22C38/06C22C38/12C22C38/22C22C38/60
CPCC21D8/1222C21D8/1233C21D8/1255C21D8/1261C21D8/1283C21D8/1294C22C38/008C22C38/02C22C38/04C22C38/06C22C38/12C22C38/22C22C38/60
Inventor 罗海文孟小涛
Owner UNIV OF SCI & TECH BEIJING
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