CN104762450A - Annealing process of producing SPCC continuous-annealing board with silicon steel annealing furnace - Google Patents
Annealing process of producing SPCC continuous-annealing board with silicon steel annealing furnace Download PDFInfo
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- CN104762450A CN104762450A CN201510109981.8A CN201510109981A CN104762450A CN 104762450 A CN104762450 A CN 104762450A CN 201510109981 A CN201510109981 A CN 201510109981A CN 104762450 A CN104762450 A CN 104762450A
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Abstract
The invention discloses an annealing process of producing an SPCC continuous-annealing board with a silicon steel annealing furnace. The method is carried out through adjustment of functions and technical parameters in all sections of the silicon steel annealing furnace. The method includes following steps: heating a steel strip to 700-720 DEG C at the temperature increasing rate of 8-10 DEG C/s; maintaining the temperature at 710-650 DEG C for 7 min; slowly cooling the steel strip at the temperature decreasing rate being not more than 3 DEG C/s for at least 60 s to decreasing the temperature to 500-550 DEG C and quickly cooling the steel strip to lower than 80 DEG C; wherein the board temperature at the outlet of a heating section is 700-720 DEG C, the board temperature at the outlet of a soaking section is 710-720 DEG C, and the board temperature at the outlet of a controlled cooling section is 500-550 DEG C, and the board temperature at the outlet of a quick cooling section is lower than 80 DEG C. The annealing process can produce a qualified continuous-annealing board through a thermal processing technology fitting the continuous-annealing board. By means of the method, a silicon steel production line has the capability of producing the continuous-annealing board. The produced steel strip coil finish product is in conformity with inner quality standard in all mechanical performances. The annealing process has important significance to optimization of product structure and improvement of profitability of enterprise.
Description
Technical field
The present invention relates to technical field of metal heat treatment, particularly a kind of utilize cold rolling in low grade non-oriented silicon steel annealing furnace produce SPCC and connect the annealing process moving back plate.
Background technology
In low grade non-oriented silicon steel annealing furnace be specially cold rolling for production in low grade non-oriented silicon steel design, body of heater is made up of inlet seal room, heating zone, soaking zone, furnace throat, expansion joint, cold section of control and rapid cooling section, and the special process parameter formulated according to this type of furnace can only meet the production of the non orientating silicon steel of the trade mark in BR50W440 ~ BR65W1300 interval.
But at present, in many large, medium and small iron and steel enterprises, low grade non-oriented silicon steel production line is gone into operation one after another, produce market shows as that supply exceed demand.In order to reduce the vacant financial loss brought of equipment to greatest extent, start with from optimizing product structure, by the processing parameter of each stove section of adjustment silicon steel annealing furnace, the ability of plate is moved back by the company making silicon steel annealing furnace possess the production huge market demand, thus improves the ability of enterprise getting profit.
Summary of the invention
Silicon steel annealing furnace because of strip thinner, the type of furnace is chosen as Horizontal Continuous Furnace, again because of silicon steel performance need, require heating zone and soaking zone longer, summation is often beyond 200m, and cooling section is shorter, is generally about 75m.The invention discloses a kind of processing parameter adjusting silicon steel annealing furnace, make silicon steel annealing furnace possess production and connect the ability of moving back plate.
Inventive principle: silicon steel annealing furnace aborning low grade non-oriented silicon steel time, heating zone exit plate temperature is 820-930 DEG C, and soaking zone exit plate temperature is 850-930 DEG C, controls cold section of exit plate temperature for 500-550 DEG C.And common continuous annealing furnace requires heating zone exit plate temperature 700-720 DEG C, soaking zone exit plate temperature 710-720 DEG C when plate moves back in the company of production, control cold section of exit plate temperature for 650-710 DEG C.The invention is characterized in function and the processing parameter thereof of adjustment silicon steel annealing furnace each stove section, move back plate to adapt to connect the thermal treatment process of moving back plate and then to produce qualified company.
Scheme of the invention: steel band can be heated rapidly to 910-930 DEG C with the speed of 12-15 DEG C/s by silicon steel annealing furnace, insulation 50-60s, with the cooling rate Slow cooling being no more than 20 DEG C/s at least 20s make plate temperature drop be cooled fast to 120 DEG C again after 500-550 DEG C, its heat treatment cycle curve is as shown in Figure 1.And the present invention connects the production requirement steel band that moves back plate with 8-10 DEG C/s heating rate to after 700-720 DEG C, with 710-650 DEG C of insulation 7min, with the speed Slow cooling being no more than 3 DEG C/s at least 60s make plate temperature drop be cooled fast to less than 80 DEG C after 500-550 DEG C, its heat treatment cycle curve is as shown in Figure 2.
The present invention is from the effect and the processing parameter that adjust each stove section of annealing furnace, the production providing a kind of simple possible connects the method for moving back plate, in making, low grade non-oriented silicon steel annealing furnace has possessed the ability that plate moves back in the company of production, has important meaning to product competitiveness of optimizing product structure, strengthen.
Accompanying drawing explanation
Fig. 1 is low grade non-oriented silicon steel annealing process curve in being;
Fig. 2 is the annealing process curve that the present invention produces SPCC.
Embodiment
Below in conjunction with embodiment, to above-mentioned being described in more detail with other technical characteristic and advantage of the present invention.
Embodiment
Steel band with 8-10 DEG C/s heating rate to after 700-720 DEG C, with 710-650 DEG C of insulation 7min, with the speed Slow cooling being no more than 3 DEG C/s at least 60s make plate temperature drop be cooled fast to less than 80 DEG C after 500-550 DEG C
In utilization described in the embodiment of the present invention, the method connecting and move back plate produced by low grade non-oriented silicon steel annealing furnace, namely changes function and the setting of each district furnace temperature of each section of annealing furnace, as shown in table 1.
Table 1 is each section of stove (plate) temperature setting during low grade non-oriented silicon steel annealing furnace production SPCC in using
Through the chill steel band sampling inspection results of the inventive method process in table 2.
The product performance that table 2 embodiment is corresponding after adopting aforesaid method
From table 2, according to the present embodiment, steel band moves back in the company that in utilization, low grade non-oriented silicon steel continuous annealing furnace is produced, performance after annealing can meet the regulation (see table 3) of the mechanical property after relevant SPCC annealing, sampling post analysis, its metallographic structure grain shape is equi-axed crystal, and grain-size, at 11-13 μm, has good obdurability coupling.
Table 3 is annealed and smooth steel band mechanical property standard
To sum up, the SPCC that the present invention only needs the adjustment of annealing furnace processing parameter that production line just can be allowed to possess the production huge market demand connects the ability of moving back plate, and product mechanical property meets standard-required, and market feedback is better.After enforcement, the vacant time of annual silicon steel production line 10% all can be used for producing SPCC, estimate to produce economic benefit 1,000,000 yuan/year.
Above-described embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determines.
Claims (2)
1. produce with silicon steel annealing furnace the annealing process that SPCC even moves back plate for one kind, it is characterized in that comprising the following steps: steel band with 8-10 DEG C/s heating rate to after 700-720 DEG C, with 710-650 DEG C of insulation 7min, with the speed Slow cooling being no more than 3 DEG C/s at least 60s make plate temperature drop be cooled fast to less than 80 DEG C after 500-550 DEG C.
2. silicon steel annealing furnace according to claim 1 produces the annealing process that SPCC even moves back plate, it is characterized in that: heating zone exit plate temperature 700-720 DEG C, soaking zone exit plate temperature 710-720 DEG C, controls cold section of exit plate temperature 500-550 DEG C, rapid cooling section exit plate temperature less than 80 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510109981.8A CN104762450A (en) | 2015-03-13 | 2015-03-13 | Annealing process of producing SPCC continuous-annealing board with silicon steel annealing furnace |
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| CN201510109981.8A CN104762450A (en) | 2015-03-13 | 2015-03-13 | Annealing process of producing SPCC continuous-annealing board with silicon steel annealing furnace |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111926171A (en) * | 2020-08-31 | 2020-11-13 | 武汉钢铁有限公司 | Continuous annealing cooling control method for cold-rolled non-oriented silicon steel strip |
| CN114645132A (en) * | 2020-07-14 | 2022-06-21 | 柳州钢铁股份有限公司 | Continuous annealing SPCC steel belt with performance close to that of cover annealing product |
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| JP3868243B2 (en) * | 2001-06-04 | 2007-01-17 | 新日本製鐵株式会社 | Chromate-free treated hot dip zinc-aluminum alloy plated steel sheet with excellent weldability and corrosion resistance |
| CN101270409A (en) * | 2008-05-07 | 2008-09-24 | 唐山钢铁股份有限公司 | Anneal technique for producing SPCC steel grade with zincing wire annealing oven |
| CN202007263U (en) * | 2011-03-30 | 2011-10-12 | 广东顺德浦项钢板有限公司 | Silicon steel annealing furnace |
| CN102943164A (en) * | 2012-11-14 | 2013-02-27 | 河北钢铁股份有限公司 | High yield-strength ratio SPCC (steel plate cold commercial) thin steel plate cold rolling and continuous annealing process method |
| CN104017964A (en) * | 2014-06-12 | 2014-09-03 | 鞍钢股份有限公司 | Silicon steel heat treatment method |
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2015
- 2015-03-13 CN CN201510109981.8A patent/CN104762450A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3868243B2 (en) * | 2001-06-04 | 2007-01-17 | 新日本製鐵株式会社 | Chromate-free treated hot dip zinc-aluminum alloy plated steel sheet with excellent weldability and corrosion resistance |
| CN101270409A (en) * | 2008-05-07 | 2008-09-24 | 唐山钢铁股份有限公司 | Anneal technique for producing SPCC steel grade with zincing wire annealing oven |
| CN202007263U (en) * | 2011-03-30 | 2011-10-12 | 广东顺德浦项钢板有限公司 | Silicon steel annealing furnace |
| CN102943164A (en) * | 2012-11-14 | 2013-02-27 | 河北钢铁股份有限公司 | High yield-strength ratio SPCC (steel plate cold commercial) thin steel plate cold rolling and continuous annealing process method |
| CN104017964A (en) * | 2014-06-12 | 2014-09-03 | 鞍钢股份有限公司 | Silicon steel heat treatment method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114645132A (en) * | 2020-07-14 | 2022-06-21 | 柳州钢铁股份有限公司 | Continuous annealing SPCC steel belt with performance close to that of cover annealing product |
| CN114645132B (en) * | 2020-07-14 | 2023-11-17 | 柳州钢铁股份有限公司 | Continuous annealing SPCC steel belt with performance close to that of cover annealing product |
| CN111926171A (en) * | 2020-08-31 | 2020-11-13 | 武汉钢铁有限公司 | Continuous annealing cooling control method for cold-rolled non-oriented silicon steel strip |
| CN111926171B (en) * | 2020-08-31 | 2022-04-29 | 武汉钢铁有限公司 | Continuous annealing cooling control method for cold-rolled non-oriented silicon steel strip |
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