Novel production method for normalizing and cooling high-magnetic-induction oriented silicon steel and product

A high magnetic induction orientation and production method technology, applied in the direction of furnace type, furnace, heat treatment furnace, etc., can solve the problems of unfavorable AlN precipitation, unfavorable cold rolling, high temperature control, etc., achieve excellent magnetic properties, improve yield, Precipitation improved effect

Inactive Publication Date: 2019-12-10
武汉尚瑞科技有限公司
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Problems solved by technology

This method has the following disadvantages in actual production: high temperature control and high energy consumption; direct water spray quenching at a high temperature of 900-950 ° C is not conducive to the precipitation of AlN of suitable size; the internal stress is large and the shape of the plate is not good during the quenching process , which is not conducive to post-process cold rolling

Method used

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  • Novel production method for normalizing and cooling high-magnetic-induction oriented silicon steel and product
  • Novel production method for normalizing and cooling high-magnetic-induction oriented silicon steel and product
  • Novel production method for normalizing and cooling high-magnetic-induction oriented silicon steel and product

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Embodiment Construction

[0016] figure 2 It is the temperature curve of the normalized cooling technology of the present invention. Such as figure 2 As shown, the first stage of normalization is carried out in the temperature range of 1050-1150 ° C for the high magnetic induction grain-oriented silicon steel plate to be normalized, and the holding time is ≤ 20s; 950°C, the cooling time is about 25s, and the second heat preservation is carried out, the time is 100-150s; then the cooling rate is controlled at 10-15°C / s to 700-800°C; then the water spray is rapidly cooled to room temperature.

[0017] Among them, air-cooling control is performed after the second heat preservation at 900-950°C, and the cooling rate is 10-15°C / s to 700-800°C. In the second stage of the normalized cooling process of the present invention, the temperature is maintained at 900-950°C for 100-150s, and then the cooling rate is controlled at 10-15°C / s to 700-800°C. This is different from the process in the prior art which i...

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Abstract

The invention aims to provide a novel production method for normalizing and cooling high-magnetic-induction oriented silicon steel. The method is used for improving the magnetic performance of the high-magnetic-induction oriented silicon steel and simultaneously improving the plate shape and the rolling property of an oriented silicon steel normalizing plate. The production method of the normalized cooling comprises the following steps of decreasing the temperature from normalizing temperature of 1050-1150 DEG C to 900-950 DEG C at the cooling speed of 5-8 DEG C / s after maintaining the normalizing temperature for not greater than 20 s; maintaining the temperature for 100-150 s for the second time; controlling the cooling speed at 10-15 DEG C / s until the temperature reaches 700-800 DEG C; discharging; and carrying out water spraying quenching.

Description

technical field [0001] The invention belongs to the field of metal material manufacturing and processing, and specifically relates to a production method and product of a novel high magnetic induction oriented silicon steel normalized cooling process. The iron loss value of the finished grain-oriented silicon steel can be improved, and the shape of the plate after normalization can be improved at the same time. Background technique [0002] From the perspective of the development trend of the transformer industry, transformers will develop in the direction of large capacity, high parameters, energy saving, and intelligence. The national electric power industry proposed the implementation strategy of energy-saving transformers in 2015, and it is clear that S9-type transformers will be phased out and S13 transformers will be used in large quantities. Type transformers, especially the obvious increase in demand for high magnetic induction grain-oriented silicon steel, will beco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D6/00C21D8/12C21D9/00
CPCC21D6/008C21D8/1261C21D9/00
Inventor 张波
Owner 武汉尚瑞科技有限公司
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