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Method for measuring average grain size of secondary recrystallization of oriented silicon steel finished plate

A technology of average grain size and secondary recrystallization, which is used in measuring devices, testing crystals, and material analysis by optical means. Wide application range and small error effect

Inactive Publication Date: 2018-12-18
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In order to solve the problems of large errors, complex calculations and application limitations in existing measurement methods, the present invention provides a method for measuring the average grain size of secondary recrystallization of oriented silicon steel finished plates, which is simple and accurate High, small error, wide range of applications and preliminary evaluation of the relationship between the average grain size and magnetic properties

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  • Method for measuring average grain size of secondary recrystallization of oriented silicon steel finished plate

Examples

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Embodiment 1

[0033] A method for measuring the average grain size of secondary recrystallization of finished oriented silicon steel plate 1

[0034] Characterize the shape of the grain with a circle, and characterize the average grain size with the diameter of the average grain, and the method may further comprise the steps:

[0035] (1) Randomly cut 15 finished oriented silicon steel plates with a size of 300×30mm (rolling direction×horizontal direction) from different positions in the oriented silicon steel coil;

[0036] (2) Heat 1500ml of 20% hydrochloric acid aqueous solution to 80°C, then add the finished oriented silicon steel plate, and macroscopically corrode for 4 minutes to obtain the secondary recrystallized macrostructure of the finished oriented silicon steel plate.

[0037] (3) Observe the macroscopic structure of erosion with the naked eye, and count the total number of grains of secondary recrystallization of 15 oriented silicon steel finished plates, wherein, the total nu...

Embodiment 2

[0042] A method for measuring the average grain size of the secondary recrystallization of the finished oriented silicon steel plate 2

[0043] Characterize the shape of the grain with a circle, and characterize the average grain size with the diameter of the average grain, and the method may further comprise the steps:

[0044] (1) Randomly cut 17 finished oriented silicon steel plates with a size of 300×30mm (rolling direction×horizontal direction) from different positions in the oriented silicon steel coil;

[0045] (2) Heat 1800ml of 25% hydrochloric acid aqueous solution to 90°C, then add the finished oriented silicon steel plate, and macroscopically corrode for 5 minutes to obtain the secondary recrystallized macrostructure of the finished oriented silicon steel plate.

[0046] (3) Observe the corroded macrostructure with the naked eye, and count the total number of secondary recrystallized grains of 17 oriented silicon steel finished plates, wherein, the total number of...

Embodiment 3

[0051] A method for measuring the average grain size of the secondary recrystallization of the finished oriented silicon steel plate 3

[0052] Characterize the shape of the grain with a circle, and characterize the average grain size with the diameter of the average grain, and the method may further comprise the steps:

[0053] (1) Randomly cut 20 pieces of finished oriented silicon steel plates with a size of 300×30mm (rolling direction×transverse direction) from different positions in the oriented silicon steel coil;

[0054] (2) Heat 2000ml of 30% hydrochloric acid aqueous solution to 100°C, then add the finished oriented silicon steel plate, and macroscopically corrode for 6 minutes to obtain the secondary recrystallized macrostructure of the finished oriented silicon steel plate.

[0055] (3) observe the macroscopic structure of erosion with the naked eye, and count the total number of secondary recrystallized grains of 20 oriented silicon steel finished plates, wherein, t...

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Abstract

The invention provides a method for measuring an average grain size of secondary recrystallization of an oriented silicon steel finished plate, wherein a shape of the grain is characterized by a circle, and the grain size is characterized by an average grain diameter. The method comprises the following steps of: macroscopically etching m pieces of oriented silicon steel finished plates having a size of a x b in solution; recording average grain numbers N of one piece of the oriented silicon steel finished plate; calculating an average grain area of the secondary recrystallization of the oriented silicon steel finished plate; determining a diameter D. The measuring method provided by the method for measuring the average grain size of secondary recrystallization of the oriented silicon steelfinished plate is simple, which has high accuracy, least error and wide application range.

Description

technical field [0001] The invention relates to a method for measuring a material for a transformer iron core in the electric power industry, in particular to a method for measuring the average grain size of secondary recrystallization of an oriented silicon steel finished plate. Background technique [0002] Oriented silicon steel is used as the core component of the power transformer—the iron core. Whether its magnetic properties are excellent or not directly affects the performance of the iron core and the transmission efficiency of the power transformer. [0003] Due to the long and complicated preparation technology of oriented silicon steel, which needs to go through a series of processes such as smelting, hot rolling, normalization, decarburization, high temperature annealing, coating of insulating coating, and tempering annealing, the requirements for equipment precision are very high; With the demand for power transmission and the increasing preparation technology, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/84
CPCG01N21/84G01N2021/8477
Inventor 何承绪杨富尧刘洋高洁吴雪马光韩钰陈新
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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