CN109570231A - A kind of production technology of the big specification angle steel of high-toughness high-strength - Google Patents
A kind of production technology of the big specification angle steel of high-toughness high-strength Download PDFInfo
- Publication number
- CN109570231A CN109570231A CN201811200372.3A CN201811200372A CN109570231A CN 109570231 A CN109570231 A CN 109570231A CN 201811200372 A CN201811200372 A CN 201811200372A CN 109570231 A CN109570231 A CN 109570231A
- Authority
- CN
- China
- Prior art keywords
- rolls
- angle steel
- steel
- toughness
- strength
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- B21B1/09—L-sections
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B2045/0212—Cooling devices, e.g. using gaseous coolants using gaseous coolants
Abstract
The invention discloses a kind of production technologies of the big specification angle steel of high-toughness high-strength, include the following steps, Step 1: choosing steel billet into heating stove heating；Step 2 carries out roughing with reversing rolling mill, rolls 7 passages；Step 3, with reversing rolling mill carry out in roll, roll 3 passages；Step 4 rolls a passage using planishing roll in 805 DEG C of progress finish rolling；High-pressure spraying pipeline is arranged on the delivery track between finishing mill and cold bed for step 5, and multiple spray nozzles are arranged along delivery track, is cooled down using steel material of the water vapour to rolling, steel material is made to be cooled to 300-400 DEG C；Then step 6 continues cool to room temperature with 18 DEG C of cooling water on cold bed；Step 7 carries out aligning and fixed length cutting.Intensity and toughness can be improved in the production technology of the big specification angle steel of the high-toughness high-strength.
Description
Technical field:
The present invention relates to angle steel production fields, are especially a kind of production work of the big specification angle steel of high-toughness high-strength
Skill.
Background technique:
Existing angle steel production technology is common process, i.e., rolling line goes up cold bed after rolling into without controlled rolling and controlled cooling equipment, finished product
Natural cooling or air cooling are to straightener permissive temperature, then are aligned, and the indexs such as intensity are come by the chemical component of steel billet just now
Ensure, especially when for big specification angle steel, since specification is bigger, compression ratio is smaller, causes impact flexibility lower.
Summary of the invention:
The technical problem to be solved by the invention is to provide a kind of the big of high-toughness high-strength that intensity and toughness can be improved
The production technology of specification angle steel.
The technical solution of the invention is as follows, provides a kind of production technology of the big specification angle steel of high-toughness high-strength, packet
Following steps are included, Step 1: choosing steel billet into heating stove heating；Step 2 carries out roughing with reversing rolling mill, rolls 7 roads
It is secondary；Step 3, with reversing rolling mill carry out in roll, roll 3 passages；Step 4, using planishing roll in 805 DEG C of progress finish rolling,
Roll a passage；Step 5 high-pressure spraying pipeline is arranged on the delivery track between finishing mill and cold bed, along conveyor track
Multiple spray nozzles are arranged in road, are cooled down using steel material of the water vapour to rolling, steel material is made to be cooled to 300-400 DEG C；Step 6,
Then room temperature is continued cool to 18 DEG C of cooling water on cold bed；Step 7 carries out aligning and fixed length cutting.
The beneficial effects of the present invention are: first carrying out high pressure-temperature cooling with water vapour, then it is fast to carry out water at low temperature for upper cold bed
Quickly cooling but, makes the refinement of angle steel grain structure sufficiently, is effectively improved the grain size of angle steel, improves angle steel impact flexibility and guarantees enough
Intensity is tested, and angle steel impact flexibility can be improved to 99J or more.
Specific embodiment:
The invention will be further described With reference to embodiment:
A kind of production technology of the big specification angle steel of high-toughness high-strength, includes the following steps, Step 1: choose steel billet into
Heat stove heating；Step 2 carries out roughing with reversing rolling mill, rolls 7 passages；Step 3, is carried out with reversing rolling mill
It rolls, rolls 3 passages；Step 4 rolls a passage using planishing roll in 805 DEG C of progress finish rolling；Step 5, in finishing mill
High-pressure spraying pipeline is set on the delivery track between cold bed, multiple spray nozzles are set along delivery track, utilize water vapour
Cool down to the steel material of rolling, steel material is made to be cooled to 350 DEG C；Then step 6 is continued on cold bed with 18 DEG C of cooling water
It is cooled to room temperature；Step 7 carries out aligning and fixed length cutting.
High pressure-temperature cooling first is carried out with water vapour, then upper cold bed carries out water at low temperature rapid cooling, makes angle steel crystal grain group
It knits refinement sufficiently, is effectively improved the grain size of angle steel, improve angle steel impact flexibility and guarantee sufficient intensity, tested, be can be improved
Angle steel impact flexibility is to 99J or more.
Claims (1)
1. a kind of production technology of the big specification angle steel of high-toughness high-strength, it is characterised in that: include the following steps, Step 1:
Steel billet is chosen into heating stove heating；Step 2 carries out roughing with reversing rolling mill, rolls 7 passages；Step 3 is rolled with reversible
Steel machine rolls in carrying out, and rolls 3 passages；Step 4 rolls a passage using planishing roll in 805 DEG C of progress finish rolling；Step
Five, high-pressure spraying pipeline is set on the delivery track between finishing mill and cold bed, multiple spray nozzles are set along delivery track,
Cooled down using steel material of the water vapour to rolling, steel material is made to be cooled to 300-400 DEG C；Step 6, then with 18 on cold bed
DEG C cooling water continue cool to room temperature；Step 7 carries out aligning and fixed length cutting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811200372.3A CN109570231A (en) | 2018-10-16 | 2018-10-16 | A kind of production technology of the big specification angle steel of high-toughness high-strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811200372.3A CN109570231A (en) | 2018-10-16 | 2018-10-16 | A kind of production technology of the big specification angle steel of high-toughness high-strength |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109570231A true CN109570231A (en) | 2019-04-05 |
Family
ID=65920143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811200372.3A Pending CN109570231A (en) | 2018-10-16 | 2018-10-16 | A kind of production technology of the big specification angle steel of high-toughness high-strength |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109570231A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114643289A (en) * | 2022-03-08 | 2022-06-21 | 石横特钢集团有限公司 | Deformed steel bar controlled cooling process method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05154596A (en) * | 1991-11-30 | 1993-06-22 | Aichi Steel Works Ltd | Manufacture of deformed flat stainless steel |
| EP0771595A1 (en) * | 1994-07-19 | 1997-05-07 | Sumitomo Metal Industries, Ltd. | Rolling mill for producing angle steel from hoop steel and method for rolling angle steel using the rolling mill |
| CN102676921A (en) * | 2012-05-04 | 2012-09-19 | 武汉钢铁(集团)公司 | Cold-resistant high-strength hot-rolled angle steel and production method thereof |
| CN104550275A (en) * | 2014-12-26 | 2015-04-29 | 钢铁研究总院 | Method and device for spray evaporation cooling of hot-rolled high-strength rebar |
| CN106391698A (en) * | 2016-09-19 | 2017-02-15 | 石横特钢集团有限公司 | High-tenacity large-specification angle steel production machining technology |
-
2018
- 2018-10-16 CN CN201811200372.3A patent/CN109570231A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05154596A (en) * | 1991-11-30 | 1993-06-22 | Aichi Steel Works Ltd | Manufacture of deformed flat stainless steel |
| EP0771595A1 (en) * | 1994-07-19 | 1997-05-07 | Sumitomo Metal Industries, Ltd. | Rolling mill for producing angle steel from hoop steel and method for rolling angle steel using the rolling mill |
| CN102676921A (en) * | 2012-05-04 | 2012-09-19 | 武汉钢铁(集团)公司 | Cold-resistant high-strength hot-rolled angle steel and production method thereof |
| CN104550275A (en) * | 2014-12-26 | 2015-04-29 | 钢铁研究总院 | Method and device for spray evaporation cooling of hot-rolled high-strength rebar |
| CN106391698A (en) * | 2016-09-19 | 2017-02-15 | 石横特钢集团有限公司 | High-tenacity large-specification angle steel production machining technology |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114643289A (en) * | 2022-03-08 | 2022-06-21 | 石横特钢集团有限公司 | Deformed steel bar controlled cooling process method |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190405 |
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| RJ01 | Rejection of invention patent application after publication |