CN106391698A - High-tenacity large-specification angle steel production machining technology - Google Patents
High-tenacity large-specification angle steel production machining technology Download PDFInfo
- Publication number
- CN106391698A CN106391698A CN201610828817.7A CN201610828817A CN106391698A CN 106391698 A CN106391698 A CN 106391698A CN 201610828817 A CN201610828817 A CN 201610828817A CN 106391698 A CN106391698 A CN 106391698A
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- China
- Prior art keywords
- angle steel
- frame
- steel
- milling train
- rolls
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/14—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel in a non-continuous process, i.e. at least one reversing stand
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2201/00—Special rolling modes
- B21B2201/06—Thermomechanical rolling
Abstract
The invention relates to a high-tenacity large-specification angle steel production machining technology. The technology comprises the following steps that 1, a steel billet is selected and placed into a dual regenerative two-walking-beam heating furnace to be heated; 2, rough rolling is carried out through a 750-type two-roller reversible mill for 5-7 passes; 3, intermediate rolling is carried out through two 750-type two-roller reversible mills for 3 passes; 4, the steel billet is stayed on a transition roller way between a finishing mill and the two 750-type mills for 0.5-3 minutes, and it is ensured that the entering temperature for the finishing mill is 800-950 DEG C; 5, finish rolling is carried out on the steel material through a 650 continuous mill at the low temperature of 800-950 DEG C for 1-4 passes; and 6, the steel material is cooled through a cooling bed, straightened, cut through a saw, stacked, weighed, marked with labels and stored. A rolling technological method is optimized for large-specification angle steel, the grain size of the large-specification angle steel with the angle being 18 or larger is obviously refined, the grain size of the angle steel is effectively improved, and angle steel impact tenacity is improved.
Description
Technical field
The present invention relates to the process technology of big specification angle steel, particularly to a kind of high tenacity big specification angle steel production and processing work
Skill.
Background technology
At present, big specification angle steel maximum is rolled down to ∠ 22；Because breaking-down roll diameter is less than normal, cause start rolling temperature real
Now reduce, current start rolling temperature executes 1140 DEG C -1180 DEG C；Because start rolling temperature is higher, lead to rolling temperature higher, enter finish rolling
Machine temperature reaches 1050 DEG C, thus leading to coarse grains, grain size only has 7 grades；Because specification is bigger, compression ratio is less, causes
Impact flexibility is lower.
Pair rolling is equal to 4 frame 650 tandem mill again to II frame 750 two-roller reversible milling train from I frame 750 two-roller reversible milling train
Rolled using a kind of rolling cycle；The present invention optimizes rolling mill practice method to big specification angle steel, and I frame 750 two-roller reversible rolls
Machine to II frame 750 two-roller reversible milling train adopt fast speed rolling, to finishing mill entrance according to specification pause 0.5-3 minute, take and dry in the air
Steel rolling, to ensure into finishing mill temperature at 800 DEG C -950 DEG C；This rolling mill practice method is so that ∠ 18 and above big specification are brilliant
Granularity substantially refines, and is changed into 9-10 level from original 6-7 level, ballistic work brings up to 60-90J by original 34-50J.
Content of the invention
The present invention provides a kind of high tenacity big specification angle steel production and processing technology, and it solves the technical scheme of technical problem
It is：
High tenacity big specification angle steel production and processing technology, comprises the steps：
（1）Choose steel billet and enter the heating of Two-cuff Technique walking beam heating furnace；
（2）I frame 750 type two-roller reversible milling train carries out roughing, rolls 5-7 passage；
（3）II frame 750 type two-roller reversible milling train rolls in carrying out, and rolls 3 passages；
（4）On transition roller-way between finishing mill and II frame 750 milling train, pause 0.5-3 minute exists it is ensured that entering finishing mill temperature
800℃-950℃；
（5）650 tandem mills carry out finish rolling, 800 DEG C of -950 DEG C of Low Temperature Finishs to steel material, roll 1-4 passage；
（6）Cold bed cooling, aligning, sawing, piling, listed warehouse-in of weighing.
The invention has the advantages that：
The present invention optimizes rolling mill practice method to big specification angle steel, and I frame 750 two-roller reversible milling train is to II frame 750 two-roller reversible
Milling train adopt fast speed rolling, to finishing mill entrance according to specification pause 0.5-3 minute, take the steel rolling that dries in the air, to ensure into finish rolling
Machine temperature is at 800 DEG C -950 DEG C；This rolling mill practice method is so that ∠ 18 and above big specification grain size substantially refine, by original
6-7 level be changed into 9-10 level, be effectively improved the grain size of angle steel, ballistic work brings up to 60J-90J by original 34J-50J, carries
High angle steel impact flexibility.
Specific embodiment
With reference to specific embodiment, the invention will be further described, but the present invention is not limited to this；
High tenacity big specification angle steel production and processing technology, comprises the steps：
（1）Choose steel billet and enter the heating of Two-cuff Technique walking beam heating furnace；
（2）I frame 750 type two-roller reversible milling train carries out roughing, rolls 5～7 passages；
（3）II frame 750 type two-roller reversible milling train rolls in carrying out, and rolls 3 passages；
（4）On transition roller-way between finishing mill and II frame 750 milling train, pause 0.5-3 minute exists it is ensured that entering finishing mill temperature
800-950℃；
（5）650 tandem mills carry out finish rolling, 800 DEG C of -950 DEG C of Low Temperature Finishs to steel material, roll 1～4 passage；
（6）Cold bed cooling, aligning, sawing, piling, listed warehouse-in of weighing.
Embodiment 1
High tenacity 20# big specification angle steel production and processing technology, comprises the steps：
（1）Choose steel billet and enter the heating of Two-cuff Technique walking beam heating furnace；
（2）I frame 750 type two-roller reversible milling train carries out roughing, rolls 6 passages；
（3）II frame 750 type two-roller reversible milling train rolls in carrying out, and rolls 3 passages；
（4）Pause 0.5 minute on transition roller-way between finishing mill and II frame 750 milling train it is ensured that entering finishing mill temperature 850
℃；
（5）650 tandem mills carry out finish rolling, 850 DEG C of Low Temperature Finishs to steel material, roll 2 passages；
（6）Cold bed cooling, aligning, sawing, piling, listed warehouse-in of weighing.
The mechanical property parameters of above-mentioned high tenacity 20# angle steel are：9 grades of grain size, angle steel impact flexibility 70-80J.
Embodiment 2
High tenacity 18# angle steel production and processing technology, comprises the steps：
（1）Choose steel billet and enter the heating of Two-cuff Technique walking beam heating furnace；
（2）I frame 750 type two-roller reversible milling train carries out roughing, rolls 7 passages；
（3）II frame 750 type two-roller reversible milling train rolls in carrying out, and rolls 3 passages；
（4）Pause 3 minutes on transition roller-way between finishing mill and II frame 750 milling train it is ensured that entering finishing mill temperature 800
℃；
（5）650 tandem mills carry out finish rolling, 800 DEG C of Low Temperature Finishs to steel material, roll 1 passage；
（6）Cold bed cooling, aligning, sawing, piling, listed warehouse-in of weighing.
The mechanical property parameters of above-mentioned high tenacity 18# angle steel are：10 grades of grain size, angle steel impact flexibility 60-80J.
Embodiment 3
High tenacity 22# angle steel production and processing technology, comprises the steps：
（1）Choose steel billet and enter the heating of Two-cuff Technique walking beam heating furnace；
（2）I frame 750 type two-roller reversible milling train carries out roughing, rolls 5 passages；
（3）II frame 750 type two-roller reversible milling train rolls in carrying out, and rolls 3 passages；
（4）Pause 0.5 minute on transition roller-way between finishing mill and II frame 750 milling train it is ensured that entering finishing mill temperature 950
℃；
（5）650 tandem mills carry out finish rolling, 950 DEG C of Low Temperature Finishs to steel material, roll 3 passages；
（6）Cold bed cooling, aligning, sawing, piling, listed warehouse-in of weighing.
The mechanical property parameters of above-mentioned high tenacity 22# angle steel are：9 grades of grain size, angle steel impact flexibility 60-80J.
Embodiment 4
High tenacity 25# angle steel production and processing technology, comprises the steps：
（1）Choose steel billet and enter the heating of Two-cuff Technique walking beam heating furnace；
（2）I frame 750 type two-roller reversible milling train carries out roughing, rolls 5 passages；
（3）II frame 750 type two-roller reversible milling train rolls in carrying out, and rolls 3 passages；
（4）Pause 0.5 minute on transition roller-way between finishing mill and II frame 750 milling train it is ensured that entering finishing mill temperature 950
℃；
（5）650 tandem mills carry out finish rolling, 950 DEG C of Low Temperature Finishs to steel material, roll 4 passages；
（6）Cold bed cooling, aligning, sawing, piling, listed warehouse-in of weighing.
The mechanical property parameters of above-mentioned high tenacity 25# angle steel are：10 grades of grain size, angle steel impact flexibility 70-80J.
Embodiment 5
High tenacity 30# angle steel production and processing technology, comprises the steps：
（1）Choose steel billet and enter the heating of Two-cuff Technique walking beam heating furnace；
（2）I frame 750 type two-roller reversible milling train carries out roughing, rolls 5 passages；
（3）II frame 750 type two-roller reversible milling train rolls in carrying out, and rolls 3 passages；
（4）Pause 0.5 minute on transition roller-way between finishing mill and II frame 750 milling train it is ensured that entering finishing mill temperature 950
℃；
（5）650 tandem mills carry out finish rolling, 950 DEG C of Low Temperature Finishs to steel material, roll 4 passages；
（6）Cold bed cooling, aligning, sawing, piling, listed warehouse-in of weighing.
The mechanical property parameters of above-mentioned high tenacity 30# angle steel are：10 grades of grain size, angle steel impact flexibility 70-90J.
By above example as can be seen that the high tenacity 18#-30# angle steel that the method according to the invention is produced has
Excellent grain size 9-10 level, angle steel impact flexibility 60-90J, high tenacity 18#-30# angle steel performance requirement can be met.
In addition to the implementation, the present invention can also have other embodiment, all employing equivalents or equivalent transformation shape
The technical scheme becoming, all falls within the protection domain of application claims.
Claims (1)
1. high tenacity big specification angle steel production and processing technology is it is characterised in that comprise the steps：
（1）Choose steel billet and enter the heating of Two-cuff Technique walking beam heating furnace；
（2）I frame 750 type two-roller reversible milling train carries out roughing, rolls 5～7 passages；
（3）II frame 750 type two-roller reversible milling train rolls in carrying out, and rolls 3 passages；
（4）Pause on transition roller-way between finishing mill and II frame 750 milling train and exist it is ensured that entering finishing mill temperature for 0.5～3 minute
800℃-950℃；
（5）650 tandem mills carry out finish rolling, 800 DEG C of -950 DEG C of Low Temperature Finishs to steel material, roll 1～4 passage；
（6）Cold bed cooling, aligning, sawing, piling, listed warehouse-in of weighing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610828817.7A CN106391698A (en) | 2016-09-19 | 2016-09-19 | High-tenacity large-specification angle steel production machining technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610828817.7A CN106391698A (en) | 2016-09-19 | 2016-09-19 | High-tenacity large-specification angle steel production machining technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106391698A true CN106391698A (en) | 2017-02-15 |
Family
ID=57997371
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610828817.7A Pending CN106391698A (en) | 2016-09-19 | 2016-09-19 | High-tenacity large-specification angle steel production machining technology |
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| CN (1) | CN106391698A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109127724A (en) * | 2018-07-12 | 2019-01-04 | 石横特钢集团有限公司 | A kind of manufacturing technique method of high tenacity angle steel |
| CN109570231A (en) * | 2018-10-16 | 2019-04-05 | 浙江鹏华新型材料有限公司 | A kind of production technology of the big specification angle steel of high-toughness high-strength |
| CN110385564A (en) * | 2019-07-29 | 2019-10-29 | 湖州阳力钢结构有限公司 | Angle steel production technology for steel construction production |
| CN111876654A (en) * | 2020-07-01 | 2020-11-03 | 石横特钢集团有限公司 | Production method of low-temperature impact resistant blank for D-level power angle steel |
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| JP2004283846A (en) * | 2003-03-20 | 2004-10-14 | Nippon Steel Corp | Hot rolling method and its equipment |
| JP2006055884A (en) * | 2004-08-20 | 2006-03-02 | Sumitomo Metal Ind Ltd | Method for manufacturing hot-rolled steel sheet and apparatus for controlling rolling |
| CN101612632A (en) * | 2009-06-23 | 2009-12-30 | 武汉钢铁(集团)公司 | Improve the method for bearing steel wire rod dimensional accuracy and surface quality |
| CN101642773A (en) * | 2009-08-31 | 2010-02-10 | 攀枝花新钢钒股份有限公司 | Production line of special section wing rail and manufacturing method thereof |
| CN102389894A (en) * | 2011-10-28 | 2012-03-28 | 首钢贵阳特殊钢有限责任公司 | Rolling process of bismuth-containing free cutting steel |
| CN103203357A (en) * | 2013-03-05 | 2013-07-17 | 安阳市常兴轧钢有限责任公司 | Rolling process of T-shaped steel on transverse three-roller rolling mill |
| CN105063309A (en) * | 2015-07-31 | 2015-11-18 | 首钢总公司 | Method for reinforcing low carbon microalloyed steel |
-
2016
- 2016-09-19 CN CN201610828817.7A patent/CN106391698A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004283846A (en) * | 2003-03-20 | 2004-10-14 | Nippon Steel Corp | Hot rolling method and its equipment |
| JP2006055884A (en) * | 2004-08-20 | 2006-03-02 | Sumitomo Metal Ind Ltd | Method for manufacturing hot-rolled steel sheet and apparatus for controlling rolling |
| CN101612632A (en) * | 2009-06-23 | 2009-12-30 | 武汉钢铁(集团)公司 | Improve the method for bearing steel wire rod dimensional accuracy and surface quality |
| CN101642773A (en) * | 2009-08-31 | 2010-02-10 | 攀枝花新钢钒股份有限公司 | Production line of special section wing rail and manufacturing method thereof |
| CN102389894A (en) * | 2011-10-28 | 2012-03-28 | 首钢贵阳特殊钢有限责任公司 | Rolling process of bismuth-containing free cutting steel |
| CN103203357A (en) * | 2013-03-05 | 2013-07-17 | 安阳市常兴轧钢有限责任公司 | Rolling process of T-shaped steel on transverse three-roller rolling mill |
| CN105063309A (en) * | 2015-07-31 | 2015-11-18 | 首钢总公司 | Method for reinforcing low carbon microalloyed steel |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109127724A (en) * | 2018-07-12 | 2019-01-04 | 石横特钢集团有限公司 | A kind of manufacturing technique method of high tenacity angle steel |
| CN109570231A (en) * | 2018-10-16 | 2019-04-05 | 浙江鹏华新型材料有限公司 | A kind of production technology of the big specification angle steel of high-toughness high-strength |
| CN110385564A (en) * | 2019-07-29 | 2019-10-29 | 湖州阳力钢结构有限公司 | Angle steel production technology for steel construction production |
| CN110385564B (en) * | 2019-07-29 | 2021-10-22 | 湖州阳力钢结构有限公司 | Angle steel production process for steel structure production |
| CN111876654A (en) * | 2020-07-01 | 2020-11-03 | 石横特钢集团有限公司 | Production method of low-temperature impact resistant blank for D-level power angle steel |
| CN111876654B (en) * | 2020-07-01 | 2021-12-07 | 石横特钢集团有限公司 | Production method of low-temperature impact resistant blank for D-level power angle steel |
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| PB01 | Publication | ||
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Application publication date: 20170215 |