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Full-technique non-oriented electrical steel continuous annealing test method

A technology of oriented electrical steel and test method, which is applied in the field of continuous annealing test of non-oriented electrical steel in the whole process, can solve the problems of poor repeatability of the same process, long test cycle, labor and material resources consumption, etc., and achieve optimization of online process parameters, shorten R&D cycle and the effect of reducing R&D costs

Active Publication Date: 2009-08-19
MAANSHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On-line trial production requires multiple steelmaking and trial production to adjust different process parameters, and the furnace environment changes slowly, the repeatability of the same process is poor, and the target process parameters are difficult to match. The cycle of each test is very long, and the superior performance It takes at least half a year for the product to be obtained, and the unqualified part (mostly) of each trial production product must be treated as scrap steel, which consumes a lot of manpower and material resources
It can be said that these test methods have problems such as long test period, waste of test raw materials, high test cost, complicated test preparation, and difficulty in repeated tests.

Method used

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Embodiment Construction

[0019] The raw material electrical steel hot-rolled coil among the present invention is rolled into the chilled coil of 0.35, 0.50, 0.65mm through cold rolling mill, obtains the 250 * 450mm rectangular template in the middle, 450mm is rolling direction, and template can not have indentation, Scratches, inclusions, holes, inclusions and other defects, then the surface is degreased, cleaned and dried for later use. After drying, the surface of the steel plate is evenly coated with high-temperature resistant and anti-oxidation coatings, and then cured and sintered, and welded on the coated surface with resistance welding. Weld 3 thermocouples on one diagonal of the template or weld 5 thermocouples on two diagonals for temperature collection. The welding position of each pair of thermocouples must be accurate, see the attached figure 1 with 2 . Put the welded thermocouple template into the MULTIPAS continuous annealing simulation unit manufactured by the German VATRON factory, st...

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Abstract

The invention discloses a method for testing the continuous-annealing of complete-process non-oriented electrical steel. The method comprises the following procedures: sample plate testing preparation; thermoelectric couple welding; simulation testing; and test result detecting: the procedure of sample plate testing preparation comprises the following steps: carrying out the deoiling and degreasing treatment and heat preservation drying on the surface of the testing sample plate, evenly coating the dried surface of the sample plate with high-temperature resistant anti-oxidation coatings and further carrying out curing and sintering, wherein, the electrical steel cold-rolling hard plate is adopted as the sample plate with the dimension being 250 mm * 450 mm (450 as the rolling direction), and the surface thereof is free from defects affecting magnetic properties; in the procedure of thermoelectric couple welding, 5 or 3 pairs of thermoelectric couples are welded in diagonal distribution on the coated testing sample plate; the procedure of simulation testing comprises the following steps: loading the welded sample plate into a continuously annealing simulation unit, starting a hydraulic clamp to clamp the sample plate, and then setting the matching relation between the temperature and the tension for testing; and the procedure of test result detecting comprises the following steps: releasing the tension, carrying out the plate shape measurement of the tested sample plate, and if the plate shape is unqualified, resetting the temperature and the tension, and conducting the test repeatedly on new sample plates until the plate shape is qualified.

Description

technical field [0001] The invention relates to a continuous annealing test method for a single piece of electrical steel, in particular to a continuous annealing test method for a full-process non-oriented electrical steel. Background technique [0002] As a functional material, electrical steel is a high-quality steel product with complex manufacturing processes and high product performance requirements. The final performance of electrical steel is realized by continuous annealing process. At present, most researches on continuous annealing process are realized through online mass production or small-scale simulated production units. On-line trial production requires multiple steelmaking and trial production to adjust different process parameters, and the furnace environment changes slowly, the repeatability of the same process is poor, and the target process parameters are difficult to match. The cycle of each test is very long, and the superior performance The product n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D6/00C21D1/26
Inventor 占云高董梅朱涛裴陈新王立涛施立发孙致平沈新玉丰慧
Owner MAANSHAN IRON & STEEL CO LTD
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