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Method for improving high silicon steel preparation process capability by utilizing high-energy electric pulse

A technology of processing capacity and electric pulse, applied in the direction of manufacturing tools, heat treatment equipment, heat treatment process control, etc., can solve the problems of difficult processing, difficulty in forming large-scale production, and room temperature plasticity problems have not been effectively solved, so as to reduce the strength , Eliminate work hardening, omit the effect of intermediate annealing

Inactive Publication Date: 2013-10-16
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the room temperature plasticity of the alloy has not been effectively solved, subsequent processing is more difficult, and it is difficult to form large-scale production

Method used

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  • Method for improving high silicon steel preparation process capability by utilizing high-energy electric pulse
  • Method for improving high silicon steel preparation process capability by utilizing high-energy electric pulse
  • Method for improving high silicon steel preparation process capability by utilizing high-energy electric pulse

Examples

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Effect test

Embodiment 1

[0018] For a high-silicon steel plate with a silicon content of 4% and no boron, the thickness is 2mm, and the tensile rate is 1s -1 . High-energy electrical pulses are applied during deformation. Electric pulse parameters are: frequency 300Hz, pulse width 150μs, peak current density 400A mm -2 , During the deformation process, the temperature of the material increases significantly, the stress decreases significantly, and the deformation is easier to carry out.

Embodiment 2

[0020] For a high-silicon steel sheet with a silicon content of 5% and a boron content of 150ppm, the thickness is 1mm, and the tensile rate is 10 -1 the s -1 , applying high-energy electric pulses during deformation. Electric pulse parameters are: frequency 200Hz, pulse width 100μs, peak current density 280A mm -2 , During the deformation process, the temperature of the material increases significantly, the stress decreases significantly, and the deformation is easier to carry out.

Embodiment 3

[0022] For a high-silicon steel sheet with a silicon content of 6.5% and a boron content of 150ppm, the thickness is 0.3mm, and the tensile rate is 10 -4 the s -1 , applying high-energy electric pulses during deformation. Electric pulse parameters are: frequency 120Hz, pulse width 70μs, peak current density 130A mm -2 , During the deformation process, the temperature of the material rises to 350°C, the flow stress remains below 600Mpa, and the stress decreases significantly, such as figure 2 As shown, the deformation is easier to carry out.

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Abstract

A method for improving high-silicon steel preparation process capability by utilizing a high-energy electrical pulse. The silicon content in the high-silicon steel accounts for 4% to 7% (percent by mass), and the balance is iron, microelement boron and unavoidable impurity elements. During high-silicon steel sheet and strip plastic processing, a high-energy electrical pulse is applied to a deformation region, the frequency of the electrical pulse being 60 to 300 Hz, the pulse width being 10 to 300 mus, and the peak current density being 20 to 500 Alpha·mm-2; during a deformation process, the application of the high-energy electrical pulse significantly reduces the deformation resistance of the high-silicon steel sheet and strip and improves the plasticity of the high silicon steel sheet and strip.

Description

technical field [0001] The invention belongs to the technical field of metal material preparation, and relates to a method for improving the plastic processing ability of high-silicon steel strips. technical background [0002] High-silicon steel generally refers to silicon steel with a silicon content exceeding 3.5% (weight ratio, the same below). Compared with ordinary silicon steel (Si content <3.5%), high-silicon steel has very excellent magnetic properties, especially high-silicon steel containing 6.5% silicon, its resistivity and magnetic permeability are significantly increased, coercive force, magnetocrystalline anisotropy The anisotropy is obviously reduced, and the magnetostriction coefficient is almost zero, so it has the characteristics of low iron loss and low noise, and has a very important application background in the power electronics industry. [0003] However, due to its high Si content, the processing ability of high-silicon steel is very poor, and th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D8/12C21D11/00
CPCC22C38/02C21D1/40C21D8/12C21D6/008C21D11/00
Inventor 梁永锋叶丰林均品周红婵房现石张来启郝国建
Owner UNIV OF SCI & TECH BEIJING
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