Non-oriented high silicon steel sheet containing boron and zirconium and preparation method thereof

A high-silicon steel and sheet technology, applied in the field of steel rolling, can solve the problems of high-silicon steel with high deformation resistance, restricting application and development, and producing thin strips or sheets, and achieves the effect of refining grains, low load, and inhibiting nucleation.

Active Publication Date: 2019-10-29
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the large grain size, excessive Fe-Si covalent bonds, high P-N force and solid solution strengthening caused by high silicon make high-silicon steel hard and brittle at room temperature, with high deformation resistance and extremely plasticity at room temperature. Poor, cold rolling deformation is difficult, it is difficult to produce qualified thin strip or plate through conventional rolling process, which restricts its application and development in the industrial field

Method used

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  • Non-oriented high silicon steel sheet containing boron and zirconium and preparation method thereof
  • Non-oriented high silicon steel sheet containing boron and zirconium and preparation method thereof
  • Non-oriented high silicon steel sheet containing boron and zirconium and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Vacuum induction furnace is used to cast high-silicon steel ingots, and its chemical composition by weight percentage is: Si 4.5%, B0.03%, Zr 0.04%, C 0.008%, Mn 0.009%, P 0.005%, S 0.004%, N 0.002 %, O0.002%, balance Fe. At a temperature of 1180°C, after 220 minutes of heat preservation, air free forging was used to form a 50mm thick billet. The heating temperature of the slab hot rolling is 1150°C, and the holding time is 110min. After the heat preservation, the non-lubricated hot rolling is carried out on a two-roll reversible experimental hot rolling mill and hot rolled to 3.5mm by 10 passes. The rolling start temperature is 1100°C. The final rolling temperature was 870°C, and then cooled to room temperature in air. Use 5% hydrochloric acid solution to pickle the hot-rolled plate, the pickling temperature is 50° C., and the pickling time is 10 minutes to remove the surface oxide scale.

[0032] Warm rolling is carried out by using a four-roll cold rolling mill, an...

Embodiment 2

[0036] Vacuum induction furnace is used to cast high-silicon steel ingots, and its chemical composition by weight percentage is: Si 5.5%, B0.04%, Zr 0.05%, C 0.007%, Mn 0.008%, P 0.005%, S 0.004%, N 0.002 %, O0.002%, balance Fe. At a temperature of 1200°C, after 210 minutes of heat preservation, air free forging was used to form a 45mm thick billet. The heating temperature of the slab hot rolling is 1180°C, and the holding time is 100min. Then, it is hot-rolled without lubrication on a two-roll reversible experimental hot rolling mill and hot-rolled to 3.0mm after 11 passes. The starting temperature is 1120°C, and the final The rolling temperature was 880°C, and then cooled to room temperature in air. Use 6% hydrochloric acid solution to pickle the hot-rolled plate, the pickling temperature is 60° C., and the pickling time is 15 minutes to remove the surface oxide scale.

[0037] Warm rolling is carried out by using a four-roll cold rolling mill, and the warm rolling process...

Embodiment 3

[0041] Vacuum induction furnace is used to cast high-silicon steel ingots, and its chemical composition by weight percentage is: Si 6.9%, B0.05%, Zr 0.06%, C 0.008%, Mn 0.007%, P 0.005%, S 0.004%, N 0.002 %, O0.002%, balance Fe. At a temperature of 1250°C, after 200 minutes of heat preservation, air free forging was used to form a 40mm thick billet. The heating temperature of the slab hot rolling is 1200°C, and the holding time is 90min. Then, it is hot-rolled without lubrication on a two-roll reversible experimental hot rolling mill and hot-rolled to 2.5mm by 12 passes. The starting temperature is 1150°C. The rolling temperature was 900°C, and then cooled to room temperature in air. The hot-rolled plate is pickled with 8% hydrochloric acid solution, the pickling temperature is 70° C., and the pickling time is 20 minutes to remove the surface oxide scale.

[0042] Warm rolling is carried out by using a four-roll cold rolling mill, and the warm rolling process is step-by-step...

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Abstract

The invention relates to a non-oriented high silicon steel sheet containing boron and zirconium and a preparation method thereof, and belongs to the steel rolling process technology field. The non-oriented high silicon steel sheet containing the boron and the zirconium is characterized by consisting of chemical components by weight percentage: 4.5-6.9% of Si, 0.03-0.05% of B, 0.04-0.06% of Zr, less than 0.01% of C, less than 0.01% of Mn, less than 0.01% of P, less than 0.01% of S, less than 0.003% of N, less than 0.003% of O and the balance Fe, and the non-oriented high silicon steel sheet containing the boron and the zirconium is 0.15-0.2mm in thickness. A microalloying method for improving plasticity of non-oriented high silicon steel by adding the B and Zr elements is provided. Based onthe non-oriented high silicon steel sheet containing the boron and the zirconium and the preparation method thereof, a novel technology which combines warm rolling and deep cold rolling is adopted for preparing the high silicon steel sheet, and by performing microalloying on the B and Zr elements and refining crystal grains through the deep cold rolling, content of an ordered phase is reduced, and the plasticity of the non-oriented high silicon steel sheet is improved.

Description

technical field [0001] The invention relates to a boron-zirconium-containing non-oriented high-silicon steel thin plate and a preparation method thereof, belonging to the technical field of steel rolling technology. Background technique [0002] According to my country's "Thirteenth Five-Year Plan", increasing the production and research and development of high-quality electrical steel is an inevitable direction for the future development of China's electrical steel. When the Si content in electrical steel increases to 4.5%, not only the iron loss reaches a very low level, but also the magnetostriction coefficient will be reduced to close to zero. Non-oriented high-silicon steel is called "steel art". Its excellent soft magnetic properties and magnetostriction have attracted many scientific and technological workers to conduct a lot of research and development, and it has broad application prospects in the field of high-frequency soft magnetic materials. However, the large ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/14C21D8/02C21D1/26C21D6/04
CPCC21D1/26C21D6/04C21D8/0226C21D8/0236C22C38/001C22C38/002C22C38/004C22C38/02C22C38/04C22C38/14
Inventor 黄艳茹蔡国君薄文静孙佳楠
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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