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Cold rolling method for high grade non-oriented silicon steel through hot rolling, acid pickling and non-edge-cutting

A technology of oriented silicon steel, hot rolling and pickling, applied in the field of silicon steel cold rolling, can solve the problems of low rolling efficiency and low yield of high silicon content varieties, achieve good surface quality, improve yield, and high product shape quality Effect

Active Publication Date: 2018-04-27
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies of the above-mentioned technologies, to provide a cold-rolling method in which high-grade non-oriented silicon steel is hot-rolled, pickled and not trimmed, so as to solve the problems of low rolling efficiency and low yield of high-silicon content varieties

Method used

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  • Cold rolling method for high grade non-oriented silicon steel through hot rolling, acid pickling and non-edge-cutting
  • Cold rolling method for high grade non-oriented silicon steel through hot rolling, acid pickling and non-edge-cutting
  • Cold rolling method for high grade non-oriented silicon steel through hot rolling, acid pickling and non-edge-cutting

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Experimental program
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Effect test

Embodiment 1

[0026] Using CVC six-high reversing mill to produce 3.01% Si, 1210mm plate width non-oriented high-grade silicon steel hot-rolled pickled coil without trimming, includes the following steps:

[0027] A) The steel coil is obtained by smelting, continuous casting and hot rolling using conventional non-oriented high-grade technology. The thickness of the steel coil before cold rolling is 2.1mm. The steel coil is subjected to normal pickling without trimming;

[0028] B) Using the one-time cold rolling method, the steel coil obtained in step A) is continuously and reversibly cold-rolled in five passes. The five passes are all rolled by a pair of work rolls. The work rolls are all flat rolls and the roll diameter is 300mm, the surface roughness of the work roll is 0.3μm, and the reduction rate, rolling force, unit tension of the inlet side and unit tension of the outlet side of each pass are controlled. For specific data, see Table 1. The rolling is carried out by emulsion spray Process...

Embodiment 2

[0036] Using a CVC six-high reversing mill to produce 3.02% Si and a plate width of 1170mm non-oriented high-grade silicon steel hot-rolled pickled and non-trimmed coils, including the following steps:

[0037] A) The steel coil is obtained by smelting, continuous casting and hot rolling using conventional non-oriented high-grade technology. The thickness of the steel coil before cold rolling is 2.2mm, and the steel coil is subjected to normal pickling without trimming;

[0038] B) Using the one-time cold rolling method, the steel coil obtained in step A) is continuously and reversibly cold-rolled in five passes. The five passes are all rolled by a pair of work rolls. The work rolls are all flat rolls and the roll diameter is 320mm, the surface roughness of the work roll is 0.5μm, and the reduction rate, rolling force, unit tension on the inlet side and unit tension on the outlet side of each pass are controlled. See Table 2 for specific data. The rolling is carried out by emulsion ...

Embodiment 3

[0046] Using a CVC six-high reversing mill to produce 3.01% Si, a plate width of 1150mm non-oriented high-grade silicon steel hot-rolled pickled and non-trimmed coils, including the following steps:

[0047] A) The steel coil is obtained by smelting, continuous casting and hot rolling using conventional non-oriented high-grade technology. The thickness of the steel coil before cold rolling is 2.3mm, and the steel coil is subjected to normal pickling without trimming;

[0048] B) Using the one-time cold rolling method, the steel coil obtained in step A) is continuously and reversibly cold-rolled in five passes. The five passes are all rolled by a pair of work rolls. The work rolls are all flat rolls and the roll diameter is 310mm, the surface roughness of the work roll is 0.4μm, and the reduction rate, rolling force, unit tension on the inlet side and unit tension on the outlet side of each pass are controlled. See Table 3 for specific data. The rolling is carried out by emulsion spr...

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Abstract

The invention relates to the field of silicon steel cold rolling, and discloses a cold rolling method for high grade non-oriented silicon steel through hot rolling, acid pickling and non-edge-cutting.The cold rolling method comprises the following steps that a steel coil is obtained, non-edge-cutting normalizing acid pickling is carried out, then a one-time cold rolling method is adopted for continuous reversible type five-pass cold rolling, the reduction rate, rolling force, entry side unit tension and exit side unit tension of each pass are controlled, emulsified liquid spraying is adoptedin rolling for process lubricating and cooling, thermal expansion adjustment steel coil plate shape of a working roll is controlled in a partitioned cooling mode, a rolled product is obtained, and then subsequent procedures are conducted conventionally. The cold rolling method for high grade non-oriented silicon steel through hot rolling solves the problems of poor rolling efficiency and poor finished product rate of high silicon content varieties.

Description

Technical field [0001] The invention relates to the field of cold rolling of silicon steel, in particular to a cold rolling method of high-grade non-oriented silicon steel hot-rolled and pickled without trimming. Background technique [0002] High-grade non-oriented silicon steel is mainly used for the iron cores of large steam turbines and hydroelectric generators, as well as the iron cores of high-efficiency energy-saving appliances, electric vehicles, and brushless DC and AC induction motors. At present, one of China's important research topics in the field of magnetic materials for various motors is to vigorously develop high-grade non-oriented silicon steel, through research and development of the latest technology, to improve the composition, adjust the process, increase the magnetism, meet market demand, and reduce imports. [0003] With the increase of silicon content of high-grade non-oriented silicon steel, the magnetic induction, resistivity and iron loss of its products...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/36B21B37/58B21B37/48B21B37/56B21B37/74
CPCB21B1/36B21B37/48B21B37/56B21B37/58B21B37/74
Inventor 彭晟远张发开张则杰李勇马正强何春帮李亚强蔡延擘李珉
Owner 武汉钢铁有限公司
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