CN103451397A - Carbon steel annealing process - Google Patents
Carbon steel annealing process Download PDFInfo
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- CN103451397A CN103451397A CN 201310417258 CN201310417258A CN103451397A CN 103451397 A CN103451397 A CN 103451397A CN 201310417258 CN201310417258 CN 201310417258 CN 201310417258 A CN201310417258 A CN 201310417258A CN 103451397 A CN103451397 A CN 103451397A
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Abstract
The invention relates to a carbon steel annealing process which is characterized in that the carbon steel comprises the following components in percentage by weight: 0.17-0.23% of C, 0.17-0.37% of Si, 0.35-0.65% of Mn, 0.006-0.010% of Ti, 0.008-0.015% of Als, and the balance of Fe and inevitable impurities. The process comprises the following steps: firstly, smelting the carbon steel to molten steel; continuously casting and rolling the molten steel to form casting blanks; heating and hot-rolling the casting blanks to form coils of strips. According to the process provided by the invention, the coils of strips are prepared by continuously casting and rolling the molten steel containing the chemical components to form the casting blanks and then heating and hot-rolling the casting blanks, and the coils of strips which are acid-washed and cold-rolled are periodically annealed in a full-hydrogen bell-type annealing furnace. The proportion that the coils of strips prepared by the process provided by the invention are sliced after annealing treatment is remarkably reduced, thereby avoiding damage to the coils of strips and improving the integral quality of steel plates processed by the coils of strips.
Description
Technical field
The present invention relates to a kind of carbon steel annealing process.
Background technology
The process of modern metallurgy industry production thin ribbon shaped material, be by the coils of hot-rolled steel to thicker carry out pickling, cold rolling reduction process is processed, thereby obtain the product that thickness, high size all meet the demands.But, cold-rolled process has also caused the work hardening of coil of strip, mechanical property and poor processability, the over-all properties that the thermal treatment of need to being annealed obtains.But the coil of strip after cold rolling work hardening is annealed after thermal treatment, and bonding defect often occurs.Due to the generation of bonding defect, cause the cold-rolled steel coils degrading quality, serious meeting causes scrapping of coil of strip.
Summary of the invention
For problems of the prior art, the object of the present invention is to provide a kind of technical scheme of carbon steel annealing process.
Described a kind of carbon steel annealing process, it is characterized in that the component that described carbon steel comprises following weight percent: C:0.17% 0.23%, Si:0.17% 0.37%, Mn:0.35% 0.65%, Ti:0.006% 0.010%, Als:0.008% 0.015%, surplus is Fe and inevitable impurity; The annealing steps of this carbon steel is: first carbon steel material is smelted into to molten steel, molten steel forms strand after continuous casting and rolling, strand is processed and is formed coil of strip through the heating hot rolling, the described slab thickness formed after continuous casting and rolling is between 40-100mm, strand is heated hot rolling to be processed while forming coil of strip, soaking temperature is controlled between 1110-1180 ℃, and finishing temperature when described heating hot rolling processing finishes is controlled between 800-900 ℃.
Described a kind of carbon steel annealing process, is characterized in that in described carbon steel that inevitable impurity comprises the Cu that is not more than 0.20%, is not more than 0.25% Cr, is not more than 0.25% Ni, is not more than 0.15% Mo, is not more than 0.007% N, is not more than 0.025% P and is not more than 0.015% S.
Described a kind of carbon steel annealing process, is characterized in that the coiling temperature of strand when described heating hot rolling is processed is controlled between 550-700 ℃.
Described a kind of carbon steel annealing process, it is characterized in that the coil of strip after described heating hot rolling is processed carries out cleanup acid treatment, cold-rolling treatment, anneal successively, when described coil of strip carries out anneal, the heated air temperature is controlled between 650-700 ℃, annealing temperature is controlled between 580-660 ℃, the annealing temperature soaking time is 1-6h, and described coil of strip carries out anneal in Full Hydrogen Bell Type Annealing Furnace.
Described a kind of carbon steel annealing process, it is characterized in that the component that described carbon steel comprises following weight percent: C:0.19% 0.21%, Si:0.23% 0.31%, Mn:0.41% 0.59%, Ti:0.007% 0.009%, Als:0.009% 0.014%, surplus is Fe and inevitable impurity.
Described a kind of carbon steel annealing process, while it is characterized in that described coil of strip carries out anneal, the heated air temperature is controlled between 660-690 ℃, and annealing temperature is controlled between 590-630 ℃.
Described a kind of carbon steel annealing process, is characterized in that finishing temperature when described heating hot rolling processing finishes is controlled between 850-880 ℃.
The present invention is by comprising the molten steel of chemical composition as mentioned above, carrying out the continuous casting and rolling processing, forms strand, then processes and form coil of strip by the heating hot rolling, and coil of strip carries out cyclic annealing through overpickling, after cold rolling in Full Hydrogen Bell Type Annealing Furnace.During anneal, the heated air temperature preferably is controlled at 660-690 ℃, annealing temperature preferably is controlled at 590-630 ℃, the coil of strip processed by described processing method, bonding ratio occurs coil of strip after anneal obviously reduces, thereby avoided the infringement to coil of strip itself, improved the total quality of the steel plate be processed into coil of strip.
Embodiment
In carbon steel annealing process of the present invention, the component that carbon steel comprises following weight percent: C:0.17% 0.23%, Si:0.17% 0.37%, Mn:0.35% 0.65%, Ti:0.006% 0.010%, Als:0.008% 0.015%, surplus is Fe and inevitable impurity; The annealing steps of this carbon steel is: first carbon steel material is smelted into to molten steel, molten steel forms strand after continuous casting and rolling, strand is processed and is formed coil of strip through the heating hot rolling, the described slab thickness formed after continuous casting and rolling is between 40-100mm, strand is heated hot rolling to be processed while forming coil of strip, soaking temperature is controlled between 1110-1180 ℃, and finishing temperature when described heating hot rolling processing finishes is controlled between 800-900 ℃.
In above-mentioned carbon steel inevitably impurity comprise the Cu that is not more than 0.20%, be not more than 0.25% Cr, be not more than 0.25% Ni, be not more than 0.15% Mo, be not more than 0.007% N, be not more than 0.025% P and be not more than 0.015% S.
The coiling temperature of strand when above-mentioned heating hot rolling is processed is controlled between 550-700 ℃.
Coil of strip after above-mentioned heating hot rolling is processed carries out cleanup acid treatment, cold-rolling treatment, anneal successively, when described coil of strip carries out anneal, the heated air temperature is controlled between 650-700 ℃, annealing temperature is controlled between 580-660 ℃, the annealing temperature soaking time is 1-6h, and described coil of strip carries out anneal in Full Hydrogen Bell Type Annealing Furnace.
As preferably, the component that carbon steel comprises following weight percent: C:0.19% 0.21%, Si:0.23% 0.31%, Mn:0.41% 0.59%, Ti:0.007% 0.009%, Als:0.009% 0.014%, surplus is Fe and inevitable impurity.
When above-mentioned coil of strip carries out anneal, the heated air temperature is controlled between 660-690 ℃, and annealing temperature is controlled between 590-630 ℃.
Finishing temperature when above-mentioned heating hot rolling processing finishes is controlled between 850-880 ℃.
The present invention is by comprising the molten steel of chemical composition as mentioned above, carrying out the continuous casting and rolling processing, forms strand, then processes and form coil of strip by the heating hot rolling, and coil of strip carries out cyclic annealing through overpickling, after cold rolling in Full Hydrogen Bell Type Annealing Furnace.During anneal, the heated air temperature preferably is controlled at 660-690 ℃, annealing temperature preferably is controlled at 590-630 ℃, the coil of strip processed by described processing method, bonding ratio occurs coil of strip after anneal obviously reduces, thereby avoided the infringement to coil of strip itself, improved the total quality of the steel plate be processed into coil of strip.
Claims (7)
1. a carbon steel annealing process, it is characterized in that the component that described carbon steel comprises following weight percent: C:0.17% 0.23%, Si:0.17% 0.37%, Mn:0.35% 0.65%, Ti:0.006% 0.010%, Als:0.008% 0.015%, surplus is Fe and inevitable impurity; The annealing steps of this carbon steel is: first carbon steel material is smelted into to molten steel, molten steel forms strand after continuous casting and rolling, strand is processed and is formed coil of strip through the heating hot rolling, the described slab thickness formed after continuous casting and rolling is between 40-100mm, strand is heated hot rolling to be processed while forming coil of strip, soaking temperature is controlled between 1110-1180 ℃, and finishing temperature when described heating hot rolling processing finishes is controlled between 800-900 ℃.
2. a kind of carbon steel annealing process according to claim 1, is characterized in that in described carbon steel that inevitable impurity comprises the Cu that is not more than 0.20%, is not more than 0.25% Cr, is not more than 0.25% Ni, is not more than 0.15% Mo, is not more than 0.007% N, is not more than 0.025% P and is not more than 0.015% S.
3. a kind of carbon steel annealing process according to claim 1, is characterized in that the coiling temperature of strand when described heating hot rolling is processed is controlled between 550-700 ℃.
4. a kind of carbon steel annealing process according to claim 1, it is characterized in that the coil of strip after described heating hot rolling is processed carries out cleanup acid treatment, cold-rolling treatment, anneal successively, when described coil of strip carries out anneal, the heated air temperature is controlled between 650-700 ℃, annealing temperature is controlled between 580-660 ℃, the annealing temperature soaking time is 1-6h, and described coil of strip carries out anneal in Full Hydrogen Bell Type Annealing Furnace.
5. a kind of carbon steel annealing process according to claim 1, it is characterized in that the component that described carbon steel comprises following weight percent: C:0.19% 0.21%, Si:0.23% 0.31%, Mn:0.41% 0.59%, Ti:0.007% 0.009%, Als:0.009% 0.014%, surplus is Fe and inevitable impurity.
6. a kind of carbon steel annealing process according to claim 5, while it is characterized in that described coil of strip carries out anneal, the heated air temperature is controlled between 660-690 ℃, and annealing temperature is controlled between 590-630 ℃.
7. a kind of carbon steel annealing process according to claim 6, is characterized in that finishing temperature when described heating hot rolling processing finishes is controlled between 850-880 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310417258 CN103451397A (en) | 2013-09-13 | 2013-09-13 | Carbon steel annealing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310417258 CN103451397A (en) | 2013-09-13 | 2013-09-13 | Carbon steel annealing process |
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| CN103451397A true CN103451397A (en) | 2013-12-18 |
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| CN 201310417258 Pending CN103451397A (en) | 2013-09-13 | 2013-09-13 | Carbon steel annealing process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110306027A (en) * | 2019-07-02 | 2019-10-08 | 浙江豪环新材料有限公司 | A kind of T8 carbon steel cold-rolling production process |
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2013
- 2013-09-13 CN CN 201310417258 patent/CN103451397A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110306027A (en) * | 2019-07-02 | 2019-10-08 | 浙江豪环新材料有限公司 | A kind of T8 carbon steel cold-rolling production process |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131218 |
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| WD01 | Invention patent application deemed withdrawn after publication |