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Production method of energy saving type GO oriented silicon steel
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A production method and technology of oriented silicon steel, applied in rolling mill control devices, metal rolling, manufacturing tools, etc., can solve the problems of limited energy saving, and achieve the effects of reducing energy consumption, reducing costs, and low iron loss
Active Publication Date: 2013-12-11
ANGANG STEEL CO LTD
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Embodiment 1
[0024] (1) Smelting and continuous casting: The smelting components are shown in Table 2. After smelting, slabs are produced by conventional methods, with a slab thickness of 200 mm.
[0025] Table 2 Example 1 steel chemical composition (wt%)
[0026]
[0027] (2) Hot rolling process: After the slab is heated to 1260 °C, it is hot rolled to a thickness of 2.3 mm at 1065 °C.
[0028] (3) One-time cold rolling process: cold-roll the hot-rolled sheet to an intermediate thickness of 0.65mm.
[0029] (4) Annealing process: the temperature is 870℃, the time is 120s, and the annealing atmosphere is 20%H 2 +80%N 2 , the dew point temperature is 30℃.
[0030] (5) Secondary cold rolling process: Roll the annealed sheet to 0.285mm.
[0032] (7) High temperature annealing process: pure N 2 Raised to 650°C for 2 hours in atmosphere; at 75% H 2 +25%N 2 In a protective atmosphere at 650°C...
Embodiment 2
[0036] (1) Smelting and continuous casting: The smelting components are shown in Table 3. After smelting, slabs are produced by conventional methods, with a slab thickness of 250 mm.
[0037] Table 3 embodiment 2 steel chemical composition (wt%)
[0038]
[0039] (2) Hot rolling process: After the slab is heated to 1270 °C, it is hot rolled to a thickness of 2.3 mm at 1075 °C.
[0040] (3) One-time cold rolling process: cold-roll the hot-rolled sheet to an intermediate thickness of 0.67 mm.
[0041] (4) Annealing process: 870℃×180s, annealing atmosphere is 20%H 2 +80%N 2 , the dew point temperature is 35℃.
[0042] (5) Secondary cold rolling process: Roll the annealed sheet to 0.285mm.
[0044] (7) High temperature annealing process: pure N 2 Raised to 650°C for 2 hours in atmosphere; at 75% H 2 +25%N 2 In a protective atmosphere at 650°C for 8h, when the dew point drops to...
Embodiment 3
[0048] (1) Smelting and continuous casting: The smelting components are shown in Table 4. After smelting, slabs are produced by conventional methods, with a slab thickness of 230 mm.
[0049] Table 4 Example 3 steel chemical composition (wt%)
[0050]
[0051] (2) Hot rolling process: After the slab is heated to 1290 °C, it is hot rolled to a thickness of 2.3 mm at 1080 °C.
[0052] (3) One-time cold rolling process: cold-roll the hot-rolled sheet to an intermediate thickness of 0.65mm.
[0053] (4) Annealing process: 870℃, time 2000s, annealing atmosphere is 20%H 2 +80%N 2 , the dew point temperature is 40 ℃.
[0054] (5) Secondary cold rolling process: Roll the annealed sheet to 0.27mm.
[0056] (7) High temperature annealing process: pure N 2Raised to 650°C for 2 hours in atmosphere; at 75% H 2 +25%N 2 In a protective atmosphere at 650°C, hold for 10h, when the dew point...
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Abstract
The invention discloses a production method of energy saving type GO oriented silicon steel. The process of the invention is as follows: smelting, performing continuous casting, heating a plate blank, performing hot rolling, performing cold rolling, performing intermediate annealing, perform secondary cold rolling, coating annealing isolation agent, performing high-temperature annealing, coating a insulating stress coating, and performing hot-drawing, levelling and annealing to obtain the finished product. The production method comprises the following steps: heating the plate blank to 1250-1300 DEG C, controlling the intermediate decarburization annealing temperature to 750-900 DEG C and the decarburization time to 2-8min; controlling the carbon content of the steel plate to less than 27ppm; perform secondary cold rolling to ensure that the thickness of the finished product is 0.22-0.35mm; coating MgO isolation agent; then performing high-temperature annealing to form an oxidation film with proper thickness and good quality and a good glass-film bottom layer, coating the insulating stress coating, and performing hot-drawing, levelling and annealing to obtain the silicon steel finished product. In the method of the invention, by adjusting the smelting components, the heating temperature of the casting plank can be reduced; the primary recrystallization annealing working procedure before high-temperature annealing is not adopted, thus simplifying the production process, increasing the productivity and reducing the cost; and the oriented silicon steel with low iron loss and high magnetic induction can be produced.
Description
Technical field: [0001] The invention relates to a metallurgical production process of oriented silicon steel, in particular to a production method of a consumption-reducing type GO oriented silicon steel. Background technique: [0002] The production process of grain-oriented silicon steel is complex, the process is numerous, and the resource consumption is serious, which are the main reasons affecting the development of grain-oriented silicon steel. According to the requirements of modern enterprises for energy saving, environmental protection and low cost, all oriented silicon steel manufacturers are developing the production technology of oriented silicon steel with short production cycle, low energy consumption and high production efficiency. [0003] There are two main ways to save energy and reduce consumption in the production of grain-oriented silicon steel under the premise of ensuring quality: refined management to reduce energy consumption; development of new tec...
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Application Information
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