A method for producing non-oriented electrical steel by endless rolling of thin slabs

A technology of oriented electrical steel and endless rolling, which is applied in the field of iron and steel, can solve problems such as head and tail temperature, plate shape and thickness fluctuations, many cutting heads and tails, and long time, so as to achieve good product surface quality and improve the finished product. The effect of high rate and short residence time

Active Publication Date: 2021-09-07
RIZHAO STEEL HLDG GROUP
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Problems solved by technology

The casting slab of the conventional process is thicker, the cooling speed is slow, the dendrite segregation is serious, the holding temperature in the heating furnace is high, the time is long, and the oxidation is serious; the hot rolling is single-block rolling, and the head and tail temperature, plate shape and thickness fluctuate greatly. As a result, there are many head and tail cuts in the post-process production, the yield rate is low, and the performance of the head and tail of the finished product is unstable, and the difference between the same board is poor.
Non-oriented electrical steel produced by conventional processes has low magnetic induction

Method used

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  • A method for producing non-oriented electrical steel by endless rolling of thin slabs
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  • A method for producing non-oriented electrical steel by endless rolling of thin slabs

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Embodiment Construction

[0033] The smelting of non-oriented electrical steel is carried out according to the pretreatment of molten iron, converter steelmaking, and vacuum treatment. The smelting composition is shown in Table 1. The continuous casting and hot-rolling production processes are shown in Table 2. The hot-rolled strips are pickled, cold-rolled into 0.50mm cold-rolled strips, and subjected to dry gas annealing at 850°C for 60s. The magnetic properties and the same-plate difference were measured, and the properties are shown in Table 3.

[0034] Table 1 Steelmaking composition %

[0035] serial number C Si mn S als N Production Process 1 0.0027 0.53 0.41 0.0045 0.0040 0.0021 Tradition 2 0.0027 0.53 0.41 0.0045 0.0040 0.0021 CSP 3 0.0027 0.53 0.41 0.0045 0.0040 0.0021 endless rolling 4 0.0035 0.82 0.24 0.0031 0.0029 0.0025 Tradition 5 0.0035 0.82 0.24 0.0031 0.0029 0.0025 CSP 6 0.0035 0.82 0.24 0.0031 0....

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Abstract

The present application belongs to the technical field of iron and steel, in particular to a method for producing non-oriented electrical steel by endless rolling of thin slabs. The mass percentage of non-oriented electrical steel composition design is: C≤0.0080%, Si≤1.0%, Als≤0.010%, Mn≤0.5%, P≤0.05%, S≤0.008%, N≤0.0080%, the rest are iron and inevitable impurities.

Description

technical field [0001] The application belongs to the technical field of iron and steel, and specifically relates to a method for producing non-oriented electrical steel by endless rolling of thin slabs. [0002] technical background [0003] Non-oriented electrical steel is a key material for making motor and compressor cores. In order to meet the development needs of high performance, low cost, and environmental friendliness, people continue to improve the production process and technology of non-oriented electrical steel. [0004] Conventional Process The conventional process for producing non-oriented electrical steel is mainly composed of steelmaking, continuous casting, pickling, cold rolling and annealing after hot rolling. The casting slab of the conventional process is thicker, the cooling speed is slow, the dendrite segregation is serious, the holding temperature in the heating furnace is high, the time is long, and the oxidation is serious; the hot rolling is sing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/06C22C38/04C21D8/02C21D1/26C21D1/74
CPCC21D1/26C21D1/74C21D8/0226C21D8/0273C22C38/001C22C38/002C22C38/004C22C38/02C22C38/04C22C38/06
Inventor 郑泽林欧阳页先金柱元陈潮许光喻宗杰梁宗仁陈良朱志强朱经涛谢基表俞尧陈统陈传敬赵锐孟令旭刘守杰温永葆郑旭涛孙庆强
Owner RIZHAO STEEL HLDG GROUP
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