Production method for improving insulating property by adding trace elements in oriented silicon steel barrier-coat

A technology of oriented silicon steel and trace elements, which is applied in the field of improving insulation performance and adding trace elements to the isolation coating of oriented silicon steel, can solve the problems of high comprehensive cost, high heating temperature of slab, difficult production in cold rolling process, etc. Magnesium oxide bottom layer quality, good adhesion effect

Inactive Publication Date: 2014-02-12
新万鑫(福建)精密薄板有限公司
View PDF8 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] ⑷. Due to the high heating temperature of the slab, the heating furnace needs to be repaired frequently, and the utilization efficiency is low. At the same time, the billet is burned, the energy consumption is high, and the hot-rolled edge cracks are large, resulting in difficult production in the cold-rolling process, low yield rate, and high overall cost. ;
[0015] ⑸. High-temperature slab heating The production process of general cold-rolled oriented silicon steel is complicated, with high technical content and large investment in production equipment
After more than half a century of development, this technology has become very mature and has made great contributions to the development of the electric power and electronics industries. The blockade has restricted the rapid development of its output, especially in countries with rapid economic development like China, which often cannot meet the rapidly increasing market demand

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Production method for improving insulating property by adding trace elements in oriented silicon steel barrier-coat
  • Production method for improving insulating property by adding trace elements in oriented silicon steel barrier-coat
  • Production method for improving insulating property by adding trace elements in oriented silicon steel barrier-coat

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] 1. Use a 500 kg vacuum furnace to smelt steel according to the method of step (1) and obtain the two final components of A and B in Table 1, and hot-roll according to the method of step (2). The specific optimal conditions for hot rolling are shown in Table 2:

[0070]Table 1. Steelmaking composition of experimental steel (wt%)

[0071]

[0072] Table 2. Experimental steel hot rolling conditions (°C)

[0073]

[0074] 2. According to step (3) normalization plus pickling step, first normalize annealing at a temperature of 1120°C, normalization annealing time is 5s, then normalization annealing at a temperature of 900°C, normalization annealing time is 60s, normalization annealing Cooling after chemical annealing, the cooling rate is 50°C / s; pickling conditions after normalizing annealing: pickling in 5wt% hydrochloric acid solution, that is, the specific preferred normalizing conditions are: 1120°C×5s+900°C×60s+50°C / s cooldown;

[0075] 3. According to step (4...

Embodiment 2

[0080] The steel strip obtained with the A component in the middle of the above table 1 and the C hot rolling condition in the table 2 is carried out the nitriding experiment in the early stage of the high temperature annealing stage according to the above method, after the normalization annealing of the step (3), the nitriding experiment of the step (4) The effects of cold rolling, decarburization annealing in step (5), and the addition of different types and quantities of elements in the magnesium oxide coating on the interlayer resistance of the magnesium silicate bottom layer on the surface of the silicon steel strip are shown in Table 4. The magnesium oxide coating The layer is made of an annealing spacer with magnesium oxide as the main component. The weight of the annealing spacer in Table 4 is 100 kg. The annealing spacer includes MgO, B and TiO 2 , wherein 0.01-0.10wt% of the mass of the annealing spacer is added with B, and 0.01-0.30wt% of the mass of the annealing sp...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a production method for improving the insulating property by adding trace elements in an oriented silicon steel barrier-coat. The production method comprises the following steps of smelting, processing in vacuum, refining and continuously casting into a blank; carrying out hot rolling; normalizing and acid pickling; carrying out once cold rolling, wherein the reduction rate is greater than or equal to 82%; decarbonizing and annealing, wherein the temperature is 750-890 DEG C, the atmosphere dew-point temperature is 25-75 DEG C, the decarbonization time is 90-350 seconds, and the total oxygen [O] of the surface of a steel belt is greater than or equal to 170 / t and less than or equal to 315 / t; coating a magnesium oxide coating added with trace elements on the surface of the steel belt; carrying out high temperature annealing, wherein the atmosphere dew-point temperature is less than or equal to 30 DEG C, two low thermal insulation steps and one high thermal insulation step are arranged, and the nitridation amount of nitrogen is greater than or equal to 16ppm; stretching and smoothing and annealing, namely, coating, annealing and smoothing. In high temperature annealing stage, silicon dioxide and magnesium oxide on the surface of the steel belt carry out chemical reaction so as to generate a magnesium silicate bottom layer, and additives are added into the magnesium oxide coating so as to help to obtain excellent finished product magnetism and good magnesium silicate bottom layer.

Description

technical field [0001] The invention belongs to the field of oriented silicon steel production, in particular to a production method for adding trace elements to an isolation coating of oriented silicon steel to improve insulation performance. Background technique [0002] 1. Traditionally, the general production method of cold-rolled grain-oriented silicon steel is as follows: [0003] ⑴. Use a converter (or electric furnace) to make steel, carry out vacuum treatment, component refining and alloying, and continuously cast into slabs. The basic chemical components are: Si (2.5-5.0), C (0.01-0.10), Mn (0.02 ~0.10), S (0.01~0.05), Als (0.01~0.05), N (0.003~0.015), and some composition systems also contain one or more of Mo, Sb, Cr, B, Bi and other elements, The rest is iron and unavoidable impurity elements, and sometimes the product may also contain Cu; [0004] (2) Before hot rolling, heat the slab to a temperature of about 1400°C in a special heating furnace, and keep it ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C33/04C23F17/00C21D8/12
Inventor 张维林王一德魏智强张爱春计甫祥聂若坤张宗恩赵伟伟许洁滨金钢南鲍军仙郑瑜滨李鹏党宁曾尚武罗朝林戴东火牟小林张淮潘建韩
Owner 新万鑫(福建)精密薄板有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap