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High-magnetic-strength hot rolling oriented silicon steel plate and production process thereof

A technology of oriented silicon steel and production process, which is applied in the field of metallurgy, can solve the problems of unsatisfactory high magnetic induction oriented silicon steel hot-rolled raw material size, energy saving, low process cost, etc., and achieve the effect of facilitating batch stable production and low process cost

Active Publication Date: 2017-11-17
BEIJING SHOUGANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a high magnetic induction hot-rolled oriented silicon steel plate and its production process, which solves or partially solves the problem that the production process in the prior art cannot meet the requirements of high magnetic induction oriented silicon steel hot-rolled raw materials in terms of performance, size and energy saving. The technical problems required have achieved the convenience of batch and stable production, the process cost is low, and the obtained high magnetic induction hot-rolled oriented silicon steel sheet can meet the performance requirements of the finished product magnetic induction B800 greater than 1.9T, and the size requirements of the lateral thickness difference less than 10μm technical effect

Method used

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  • High-magnetic-strength hot rolling oriented silicon steel plate and production process thereof

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Experimental program
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Effect test

Embodiment 1

[0044] Process: The continuous casting slab is sent into the heating furnace for heating; the temperature of the continuous casting slab into the heating furnace is 255°C; the slab sent out of the heating furnace is subjected to coarse dephosphorization in turn, and the pressure and width of the sizing machine are used to determine the width, R1 Phosphorus removal, E1, R1 rough rolling mills for rough rolling, R2 for phosphorus removal, E2, R2 rough rolling mills for rough rolling, fine phosphorus removal, finish rolling, laminar cooling and coiling; after rough rolling, intermediate slabs are obtained; finish rolling After the completion, the finished slab is obtained; the temperature drop from the slab out of the furnace to the end of the rough rolling is 110°C through the control of the rough descaling header valve and the rough rolling mode control, and the end temperature of the rough rolling is 1020°C; The ratio is equal to 86%; when the rough rolling is completed and the...

Embodiment 2

[0047] Process: Send the continuous casting slab into the heating furnace for heating; the temperature of the continuous casting slab into the heating furnace is 462°C; the slab sent out of the heating furnace is subjected to rough dephosphorization in turn, and the pressure and width of the sizing machine are used to determine the width, R1 Phosphorus removal, E1, R1 rough rolling mills for rough rolling, R2 for phosphorus removal, E2, R2 rough rolling mills for rough rolling, fine phosphorus removal, finish rolling, laminar cooling and coiling; after rough rolling, intermediate slabs are obtained; finish rolling After the completion, the finished slab is obtained; the temperature drop from the slab out of the furnace to the end of the rough rolling is 105°C through the control of the rough descaling header valve and the rough rolling mode control, and the end temperature of the rough rolling is 1025°C; The rate is 90%; from the completion of rough rolling to the start of fini...

Embodiment 3

[0050] Process: The continuous casting slab is sent into the heating furnace for heating; the temperature of the continuous casting slab into the heating furnace is 568°C; the slab sent out of the heating furnace is subjected to coarse dephosphorization in turn, and the pressure and width of the sizing machine are used to determine the width of the R1 Phosphorus removal, E1, R1 rough rolling mills for rough rolling, R2 for phosphorus removal, E2, R2 rough rolling mills for rough rolling, fine phosphorus removal, finish rolling, laminar cooling and coiling; after rough rolling, intermediate slabs are obtained; finish rolling After the completion, the finished slab is obtained; the temperature drop from the slab out of the furnace to the end of the rough rolling is 120°C through the control of the rough descaling header valve and the rough rolling mode control, and the end temperature of the rough rolling is 1018°C; The rate is 92%; when the rough rolling is completed and the fin...

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Abstract

The invention relates to a high-magnetic-strength hot rolling oriented silicon steel plate and a production process thereof. High-magnetic-strength hot rolling oriented silicon steel comprises chemical components including, by mass percentage, less than 0.1% of C, 3.0%-5.0% of Si, 0.05%-0.20% of Mn, 0.02%-0.030% of P, 0.005%-0.009% of S, 0.00255%-0.0284% of Al, not larger than 0.002% of Ti and the balance Fe and inevitable impurities. The production process includes the steps that a continuous casting sheet billet is fed into a heating furnace to be heated; and the sheet billet sent out from the heating furnace is sequentially subject to coarse dephosphorization, pressure width determination, coarse rolling, refined dephosphorization, finish rolling, laminar cooling and rolling. By means of the production process, in-batch and stable production is facilitated, the process cost is lower, and the obtained high-magnetic-strength hot rolling oriented silicon steel plate can meet the performance requirement that the finished product induction B800 is larger than 1.9 T and the size requirement that the transverse thickness difference is smaller than 10 micrometers.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a high magnetic induction hot-rolled oriented silicon steel plate and a production process thereof. Background technique [0002] In order to realize the country's call for the establishment of green energy and environmental protection, the oriented silicon steel used in UHV transformers has gradually broken the traditional hot-rolled high-temperature production process, and began to switch to an energy-saving and efficient low-temperature process. The production process and technology of hot-rolled grain-oriented silicon steel need to meet the performance requirements of high magnetic induction grain-oriented silicon steel finished product magnetic induction B800 greater than 1.9T, the size requirement of lateral thickness difference less than 10μm, and the production requirements of energy saving and consumption reduction. [0003] The production process in the prior art can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/14C21D8/12
CPCC21D8/1222C22C38/02C22C38/04C22C38/06C22C38/14
Inventor 曹瑞芳王学强李金保王伦陈俊男张转转关建东
Owner BEIJING SHOUGANG CO LTD