An energy-saving and high-efficiency ordinary grain-oriented silicon steel manufacturing method
A production efficiency, oriented silicon steel technology, applied in the field of energy-saving and high production efficiency ordinary oriented silicon steel manufacturing, can solve the problems of high temperature annealing and long production cycle, achieve the effect of compact production and improve production efficiency
Active Publication Date: 2015-10-07
ANGANG STEEL CO LTD
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Problems solved by technology
Bell furnace or ring furnace is used for high temperature annealing, and the secondary recrystallization is completed by slowly raising the temperature of the oriented silicon steel coil above 600°C (the heating rate is generally 15-25°C / h), and the heating time is 30-40h; In order to purify steel (that is, steel desulfurization), it is necessary to keep warm for a long time (10-40h) in the high temperature section (1180-1210°C). a bottleneck of
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[0045] 1 process route
[0046] Smelting and continuous casting → hot rolling → normalized pickling → primary cold rolling → decarburization annealing → secondary cold rolling → secondary recrystallization annealing → MgO coating → high temperature purification annealing → smooth annealing and coating insulating film;
[0047] 2 process parameters
[0048] 2.1 Smelting and continuous casting
[0049] The composition of the grain-oriented silicon steel obtained by smelting is shown in Table 2, and the thickness of the slab is 230 mm.
[0050] Table 2 Composition (wt%)
[0051] C
Si
mn
P
S
als
N
0.025
3.3
0.14
0.015
0.025
0.018
0.008
[0052] 2.2 Hot rolling process
[0053] The cast slab is heated to 1280°C in a heating furnace and kept at a temperature of 150 minutes. After heat treatment, it is hot-rolled to obtain a hot-rolled steel plate with a thickness of 2.3 mm.
[0054] 2.3...
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Abstract
The invention discloses an energy-saving and high-production-efficiency method for preparing common grain-oriented silicon steel. The process comprises the following steps of: smelting and continuously casting, hot-rolling, normalizing and acid-washing, performing primary cold rolling, decarbonizing and annealing, performing secondary cold rolling, performing secondary recrystallization annealing, coating Mgo, performing high-temperature purification annealing, and performing flat annealing and coating an insulation film. On the premise of low-temperature heating of grain-oriented silicon steel casting blank, decarbonizing and annealing is performed between two times of cold rolling, an intermediate annealing process is eliminated, the high-temperature annealing of the grain-oriented silicon steel is divided into secondary recrystallization annealing and high-temperature purification annealing which are implemented separately, and the aims of saving energy and reducing consumption, and improving production rhythm and efficiency can be fulfilled.
Description
technical field [0001] The invention relates to a production method of ordinary oriented silicon steel, in particular to an energy-saving and high production efficiency ordinary oriented silicon steel production method. Background technique [0002] Grain-oriented silicon steel is known as a "handicraft" in steel products because of its narrow process window and complicated preparation process. It is an important soft magnetic alloy used in the electric power and electronics industries. [0003] The production process route of ordinary oriented silicon steel is: smelting and continuous casting → high temperature heating and hot rolling → primary cold rolling → intermediate annealing → secondary cold rolling → decarburization annealing → MgO coating → high temperature annealing → smooth annealing and coating insulating film . [0004] With the increasingly tense energy supply and the requirements of environmental protection and low-carbon economic development, the shortcomin...
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IPC IPC(8): C22C38/06
Inventor 蒋奇武金文旭付勇军游清雷张静张海利庞树芳王晓达苏皓璐贾志伟
Owner ANGANG STEEL CO LTD