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Oriented electrical sheet containing trace amount depressor and method for manufacturing same

A technology of oriented electrical steel and manufacturing methods, applied in the direction of manufacturing tools, metal rolling, temperature control, etc., can solve the problems of low heating temperature and inappropriateness of hot rolling, and achieve the reduction of product prices, reduction of energy consumption and production costs Effect

Inactive Publication Date: 2009-12-09
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its hot rolling heating temperature is relatively low, which is not suitable for the production of traditional grain-oriented electrical steel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1: adopt composition and be 0.0053wt% C, 3.1wt% Si, 0.021wt% Mn, 0.021wt% Nb, 0.0025wt% Al, 0.0056wt% S, 0.0071wt% P, the balance is the containing trace inhibition of Fe Oriented electrical steel billet in agent experiment, hot rolling heating temperature 1220°C, finish rolling thickness 2.8mm, finish rolling temperature 872°C; average cooling rate after rolling 40°C / s; simulated coiling temperature 581°C. The annealing and cold rolling process of conventional high-performance non-oriented electrical steel is used for subsequent treatment. After testing, the iron loss of the finished product is: P 1.7 =1.93W / kg, magnetic induction: B 8 = 1.63T.

Embodiment 2

[0011] Embodiment 2: The composition is 0.0061wt% C, 3.2wt% Si, 0.033wt% Mn, 0.025wt% Nb, 0.0018wt% Al, 0.0063wt% S, 0.0092wt% P, and the balance is Fe containing trace inhibition Oriented electrical steel billet in agent experiment, hot rolling heating temperature 1180°C, finish rolling thickness 3.1mm, finish rolling temperature 853°C; average cooling rate after rolling 45°C / s; simulated coiling temperature 589°C. The annealing and cold rolling process of conventional high-performance non-oriented electrical steel is used for subsequent treatment. After testing, the iron loss of the finished product is: P 1.7 =1.97W / kg, magnetic induction: B 8 =1.66T.

Embodiment 3

[0012] Embodiment 3: adopt composition and be 0.0045wt% C, 3.0wt% Si, 0.029wt% Mn, 0.012wt% Nb, 0.0031wt% Al, 0.0045wt% S, 0.0065wt% P, the balance is the containing trace inhibition of Fe Oriented electrical steel billet in agent experiment, hot rolling heating temperature 1140°C, finish rolling thickness 2.5mm, finish rolling temperature 841°C; average cooling rate after rolling 42°C / s; simulated coiling temperature 572°C. The annealing and cold rolling process of conventional high-performance non-oriented electrical steel is used for subsequent treatment. After testing, the iron loss of the finished product is: P 1.7 =2.04W / kg, magnetic induction: B 8 =1.72T.

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PUM

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Abstract

A grain-oriented electrical steel sheet containing a trace inhibitor and a manufacturing method thereof relate to a manufacturing method of a grain-oriented electrical steel sheet. The composition range of the oriented electrical steel proposed by the present invention is: C: 0.003-0.01wt%, Si: 2.0-4.5wt%, P: <0.02wt%, S: 0.003-0.01wt%, Mn: 0.01-2wt%, Ti: <0.03wt%, V: <0.03wt%, Nb: <0.05wt%, Zr: <0.05wt%, (Ti+V+Nb+Zr): <0.05wt%, B: <0.0004wt%, The content of each other element: <0.005wt%, the balance is Fe. The manufacturing method is to heat the continuous casting slab of oriented electrical steel sheet to 1250-1050°C, keep it warm and send it to a hot continuous rolling mill. The average cooling rate is 100-20°C / sec, and it is coiled below 600°C. The invention does not perform decarburization annealing and substrate purification treatment, can obviously reduce the energy consumption and production cost of the processing process, greatly reduces the product price, and meets the needs of many medium and small transformer products for iron core selection.

Description

technical field [0001] The invention belongs to the field of ferrous metal processing, and in particular relates to a method for manufacturing oriented electrical steel sheets. Background technique [0002] According to different scopes of use, electrical steel can be roughly divided into two categories: oriented electrical steel suitable for directional magnetic fields of transformers and non-oriented electrical steel suitable for rotating magnetic fields of motors. The crystal anisotropy and extremely strong Goss texture (ie {110}<001> texture) lead to the extremely excellent magnetic properties in the rolling direction of the steel plate. Therefore, oriented electrical steel should be widely used as the soft magnetic core material for the oriented magnetic field of transformers. In addition to using non-oriented electrical steel for the rotating magnetic field core of motors and oriented electrical steel for the directional magnetic field iron core of transformers,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/04C22C38/14C21D8/12B21B37/16B21B37/74B21D5/00
Inventor 毛卫民杨平朱国辉冯惠平
Owner UNIV OF SCI & TECH BEIJING