A method for preparing low-cost grain-oriented silicon steel by continuous annealing
A low-cost technology for oriented silicon steel, which is applied in the field of preparing low-cost oriented silicon steel by continuous annealing, can solve the problems of long annealing time for secondary recrystallization, achieve the effects of shortening production time, shortening the process flow, and improving production efficiency
Inactive Publication Date: 2017-08-08
UNIV OF SCI & TECH BEIJING
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However, the secondary recrystallization in this preparation method can only occur during the slow heating process, and the secondary recrystallization annealing time is longer
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[0029] 1 process route
[0030] Smelting and continuous casting→hot rolling→primary cold rolling→intermediate annealing→secondary cold rolling→continuous annealing
[0031] 2 process parameters
[0032] 2.1 Smelting and continuous casting
[0033] The composition of the grain-oriented silicon steel obtained after smelting is shown in Table 2, and the original thickness of the slab is 30mm.
[0034] Table 2 Composition (wt%)
[0035] Si C mn S Al 3 0.05 0.05 0.02 0.017
[0036] 2.2 Hot rolling process
[0037] The original cast slab is kept at 1200°C for 30 minutes, and after heat treatment, it is hot-rolled five times to a hot-rolled plate with a thickness of 2mm.
[0038] 2.3 Primary cold rolling process
[0039] Preheating at 150°C for 10 minutes, the reduction rate of primary cold rolling is controlled to three parameters of 77.5%, 71.5%, and 64%. The thicknesses of the steel plates after one cold rolling are 0.46mm, 0.56mm, and 0.72mm respe...
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Abstract
The invention proposes a method for preparing low-cost oriented silicon steel by continuous annealing. The process route is: smelting and casting→hot rolling→primary cold rolling→intermediate annealing→secondary cold rolling→continuous annealing. The invention presupposes the low-temperature heating of oriented silicon steel, omits the normalization process, and at the same time changes the slow heating, high-temperature and long-time annealing in the traditional process into continuous annealing, greatly shortens the production period, and achieves the purpose of saving costs and improving efficiency. The magnetic properties of the final prepared product are much higher than that of traditional non-oriented silicon steel, and slightly lower than that of commercial grain-oriented silicon steel. In some fields where oriented silicon steel and non-oriented silicon steel can be used together, it can play a better effect.
Description
technical field [0001] The invention relates to a production method of oriented silicon steel, in particular to a production method for preparing oriented silicon steel with short flow, low cost and low energy consumption. Background technique [0002] As one of the core materials of various motors and transformers, silicon steel is mainly used to make iron cores. With the continuous development of the electromechanical industry, the demand for silicon steel is also increasing. Oriented silicon steel is known as a "handicraft" in the steel industry, and its excellent performance has always been respected. However, the production process is long, the process is difficult, the energy consumption and material consumption are large, and the preparation cost is high. At present, the country attaches great importance to the work of energy saving and consumption reduction, and the National Development and Reform Commission has put forward the requirement of "taking resolute measu...
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IPC IPC(8): C21D8/12C21D6/00
Inventor 焦懿德杨平秦镜张宁
Owner UNIV OF SCI & TECH BEIJING