CN106493169A - A kind of production technology of steel rolling - Google Patents
A kind of production technology of steel rolling Download PDFInfo
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- CN106493169A CN106493169A CN201611154312.3A CN201611154312A CN106493169A CN 106493169 A CN106493169 A CN 106493169A CN 201611154312 A CN201611154312 A CN 201611154312A CN 106493169 A CN106493169 A CN 106493169A
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- steel billet
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- 238000005096 rolling process Methods 0.000 title claims abstract description 98
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 94
- 239000010959 steel Substances 0.000 title claims abstract description 94
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 34
- 238000005516 engineering process Methods 0.000 title claims abstract description 29
- 238000001816 cooling Methods 0.000 claims abstract description 52
- 238000010438 heat treatment Methods 0.000 claims abstract description 33
- 238000009749 continuous casting Methods 0.000 claims abstract description 20
- 238000005520 cutting process Methods 0.000 claims abstract description 11
- 238000005266 casting Methods 0.000 claims abstract description 10
- 230000014759 maintenance of location Effects 0.000 claims abstract description 10
- 239000012467 final product Substances 0.000 claims abstract description 8
- 238000007689 inspection Methods 0.000 claims abstract description 8
- 238000010008 shearing Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 239000000047 product Substances 0.000 abstract description 11
- 238000000034 method Methods 0.000 description 10
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
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
- B21B1/02—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 heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
-
- 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
- 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
- B21B1/02—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 heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
- B21B2001/028—Slabs
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The present invention discloses a kind of production technology of steel rolling, and the production technology comprises the following steps：(1) enter stove：Steel billet after continuous casting, cutting is transported in heating furnace, the casting speed control of the continuous casting is in 1.0 1.4m/min；(2) heat：Step (1) steel billet is carried out preheating in heating furnace, is incubated, and the preheating temperature is 1,100 1300 DEG C, and preheating time is 15 30min；The holding temperature is 1,150 1250 DEG C, and temperature retention time is 30 40min；(3) tap：Steel billet after step (2) heating is tapped by extractor；(4) roll：Steel billet after step (3) is tapped is rolled, and the rolling includes roughing, crop, finish rolling, back-end crop；(5) finishing：Steel billet after step (4) is rolled is obtained final product after Double Dimension Flying Shears, cooling, inspection.The production efficiency of the production technology is high, energy-saving, product good mechanical property, and tensile strength and yield strength are higher.
Description
Technical field
The present invention relates to technical field of steel production, and in particular to a kind of production technology of steel rolling.
Background technology
Steel rolling refers to the pressing process for being compressed and being produced plastic deformation between roll of the metal by rotation.Steel rolling
Purpose, partly in order to obtaining the steel of required form, be on the other hand the internal soundness in order to improve steel, improve steel
Mechanical property.For hot-working, a kind of production technology procedures for steel rolling is made up of following basic working procedure：I.e. blank prepare,
Blank heating, the rolling of steel, roller repairing and finishing.The cold working technological process of production is affected by its feature, process previous as
Heat treatment to be carried out and pickling, and one or many intermediate heat-treatment will be carried out in process.Existing steel rolling process
In flow process, there is its flow process complicated, establishing and basis instrument investment height, high energy consumption, it is impossible to reach the mesh of energy-conserving and environment-protective
's；Additionally, flow setting and the defect on state modulator, cause unstable product quality, mechanical performance not to reach requirement.
Content of the invention
In view of this, the application provides a kind of production technology of steel rolling, and the production efficiency of the production technology is high, and energy-conservation drops
Consume, product good mechanical property, tensile strength and yield strength are higher.
For solving above technical problem, the technical scheme that the present invention is provided is a kind of production technology of steel rolling, the production
Technique comprises the following steps：
(1) enter stove：Steel billet after continuous casting, cutting is transported in heating furnace, the casting speed control of the continuous casting exists
1.0-1.4m/min；
(2) heat：Step (1) steel billet is carried out preheating in heating furnace, is incubated, and the preheating temperature is 1100-1300 DEG C,
Preheating time is 15-30min；The holding temperature is 1150-1250 DEG C, and temperature retention time is 30-40min；
(3) tap：Steel billet after step (2) heating is tapped by extractor；
(4) roll：Steel billet after step (3) is tapped is rolled, and the rolling includes roughing, crop, finish rolling, cuts
Tail；
(5) finishing：Steel billet after step (4) is rolled is obtained final product after Double Dimension Flying Shears, cooling, inspection.
Preferably, the casting speed control of step (1) continuous casting is in 1.35m/min.
Preferably, step (2) preheating temperature is 1150-1280 DEG C, and preheating time is 20-30min；The insulation temperature
Spend for 1150-1200 DEG C, temperature retention time is 30-35min.
Preferably, in step (4) rolling, start rolling temperature is 1100-1200 DEG C.
Preferably, in step (4) rolling, steel billet is adopted using two frame roughing and four frame finish rolling, rough rolling step
Four-pass is rolled, and the finish rolling stage adopts six passes.
Preferably, step (4) the roughing finishing temperature is 1150-1200 DEG C, and the finish rolling finishing temperature is 890-940
℃.
Preferably, step (4) crop and cutter is respectively adopted for the back-end crop and lock is cut, the cutter and described
The shearing force that lock is cut is 120-150t.
Preferably, step (5) cooling is combined using water-cooled and air cooling, first adopts water-cooled to be not more than the cold of 8 DEG C/s
But speed is cooled to 280-320 DEG C, being cooled to 230-270 DEG C using air cooling, then adopts water-cooled with the cooldown rate of 4-6 DEG C/s
180-220 DEG C is cooled to, then room temperature is cooled to using air cooling.
It is more highly preferred to, the air cooling is section cooling.
Technical scheme provides a kind of production technology of steel rolling, includes into stove, heating, tapping, rolling, finishing
The step of, the wherein casting speed control of continuous casting in 1.0-1.4m/min, and through continuous casting and cutting after steel billet be directly entered plus
Hot stove, not through slow cooling or annealing, it is to avoid the appearance of crackle during heating steel billet so as to which what heating quality met rolling will
Ask；In heating furnace, heating process divide into preheating section and soaking zone, being rolled in the range of heating steel billet to technology controlling and process
System, steel billet now have good plasticity, it is easier to deform, while the probability of equipment part abrasion can be reduced, and can adopt
With larger drafts, passage, improve production efficiency is reduced；In the operation of rolling control start rolling temperature, roughing finishing temperature and
Finish rolling finishing temperature, makes steel billet be rolled more than recrystallization temperature, can reduce resistance of deformation, reducing energy consumption, it is ensured that product
Mechanical performance；Additionally, shearing force during control cutting head cutting tail so as to which end shearing is honest, it is to avoid the impact of local deformation；In essence
During whole, control cooling speed and cooling temperature, it is to avoid after rolling steel part quenching, it is ensured that the tensile strength of product and
Yield strength.
Compared with prior art, the production technology of the steel rolling described in technical scheme, its production efficiency are high, and energy-conservation drops
Consume, product good mechanical property, tensile strength and yield strength are higher.
Specific embodiment
In order that those skilled in the art more fully understands technical scheme, with reference to specific embodiment pair
The present invention is described in further detail.
Embodiment 1
A kind of production technology of the steel rolling described in the present embodiment, comprises the following steps：
(1) enter stove：Steel billet after continuous casting, cutting is transported in heating furnace, the casting speed control of the continuous casting exists
1.2m/min；
(2) heat：Step (1) steel billet is carried out preheating in heating furnace, is incubated, and the preheating temperature is 1200 DEG C, preheating
Time is 20min；The holding temperature is 1200 DEG C, and temperature retention time is 35min；
(3) tap：Steel billet after step (2) heating is tapped by extractor；
(4) roll：Steel billet after step (3) is tapped is rolled, and the rolling includes roughing, crop, finish rolling, cuts
Tail, wherein steel billet are rolled using four-pass using two frame roughing and four frame finish rolling, rough rolling step, and the finish rolling stage adopts six roads
Secondary rolling, start rolling temperature are 1150 DEG C, and roughing finishing temperature is 1180 DEG C, and finish rolling finishing temperature is 900 DEG C；The crop and institute
State that back-end crop is respectively adopted cutter and lock is cut, the shearing force that the cutter and the lock are cut is 140t；
(5) finishing：Steel billet after step (4) is rolled is obtained final product after Double Dimension Flying Shears, cooling, inspection, and wherein, cooling is adopted
Combined with water-cooled and air cooling, the cooldown rate for water-cooled first being adopted to be not more than 8 DEG C/s is cooled to 300 DEG C, cooled down using air cooling
To 250 DEG C, then adopt water-cooled 200 DEG C to be cooled to the cooldown rate of 5 DEG C/s, then room temperature is cooled to using air cooling, the air cooling
For section cooling.
In the present embodiment, finished product steel rolling plate property testing result is：Thickness is that the steel plate average hardness of 20mm is
415HB, yield strength are 1260MPa, and tensile strength is 1320MPa, and elongation percentage is 10.8%.
Embodiment 2
A kind of production technology of the steel rolling described in the present embodiment, comprises the following steps：
(1) enter stove：Steel billet after continuous casting, cutting is transported in heating furnace, the casting speed control of the continuous casting exists
1.0m/min；
(2) heat：Step (1) steel billet is carried out preheating in heating furnace, is incubated, and the preheating temperature is 1100 DEG C, preheating
Time is 15min；The holding temperature is 1150 DEG C, and temperature retention time is 30min；
(3) tap：Steel billet after step (2) heating is tapped by extractor；
(4) roll：Steel billet after step (3) is tapped is rolled, and the rolling includes roughing, crop, finish rolling, cuts
Tail, wherein steel billet are rolled using four-pass using two frame roughing and four frame finish rolling, rough rolling step, and the finish rolling stage adopts six roads
Secondary rolling, start rolling temperature are 1100 DEG C, and roughing finishing temperature is 1150 DEG C, and finish rolling finishing temperature is 890 DEG C；The crop and institute
State that back-end crop is respectively adopted cutter and lock is cut, the shearing force that the cutter and the lock are cut is 120t；
(5) finishing：Steel billet after step (4) is rolled is obtained final product after Double Dimension Flying Shears, cooling, inspection, and wherein, cooling is adopted
Combined with water-cooled and air cooling, the cooldown rate for water-cooled first being adopted to be not more than 8 DEG C/s is cooled to 280 DEG C, cooled down using air cooling
To 230 DEG C, then adopt water-cooled 180 DEG C to be cooled to the cooldown rate of 4 DEG C/s, then room temperature is cooled to using air cooling, the air cooling
For section cooling.
In the present embodiment, finished product steel rolling plate property testing result is：Thickness is that the steel plate average hardness of 20mm is
398HB, yield strength are 1200MPa, and tensile strength is 1320MPa, and elongation percentage is 9.9%.
Embodiment 3
A kind of production technology of the steel rolling described in the present embodiment, comprises the following steps：
(1) enter stove：Steel billet after continuous casting, cutting is transported in heating furnace, the casting speed control of the continuous casting exists
1.4m/min；
(2) heat：Step (1) steel billet is carried out preheating in heating furnace, is incubated, and the preheating temperature is 1300 DEG C, preheating
Time is 30min；The holding temperature is 1250 DEG C, and temperature retention time is 40min；
(3) tap：Steel billet after step (2) heating is tapped by extractor；
(4) roll：Steel billet after step (3) is tapped is rolled, and the rolling includes roughing, crop, finish rolling, cuts
Tail, wherein steel billet are rolled using four-pass using two frame roughing and four frame finish rolling, rough rolling step, and the finish rolling stage adopts six roads
Secondary rolling, start rolling temperature are 1200 DEG C, and roughing finishing temperature is 1200 DEG C, and finish rolling finishing temperature is 940 DEG C；The crop and institute
State that back-end crop is respectively adopted cutter and lock is cut, the shearing force that the cutter and the lock are cut is 150t；
(5) finishing：Steel billet after step (4) is rolled is obtained final product after Double Dimension Flying Shears, cooling, inspection, and wherein, cooling is adopted
Combined with water-cooled and air cooling, the cooldown rate for water-cooled first being adopted to be not more than 8 DEG C/s is cooled to 320 DEG C, cooled down using air cooling
To 270 DEG C, then adopt water-cooled 220 DEG C to be cooled to the cooldown rate of 6 DEG C/s, then room temperature is cooled to using air cooling, the air cooling
For section cooling.
In the present embodiment, finished product steel rolling plate property testing result is：Thickness is that the steel plate average hardness of 20mm is
410HB, yield strength are 1250MPa, and tensile strength is 1330MPa, and elongation percentage is 10.2%.
Embodiment 4
A kind of production technology of the steel rolling described in the present embodiment, comprises the following steps：
(1) enter stove：Steel billet after continuous casting, cutting is transported in heating furnace, the casting speed control of the continuous casting exists
1.3m/min；
(2) heat：Step (1) steel billet is carried out preheating in heating furnace, is incubated, and the preheating temperature is 1100 DEG C, preheating
Time is 30min；The holding temperature is 1150 DEG C, and temperature retention time is 40min；
(3) tap：Steel billet after step (2) heating is tapped by extractor；
(4) roll：Steel billet after step (3) is tapped is rolled, and the rolling includes roughing, crop, finish rolling, cuts
Tail, wherein steel billet are rolled using four-pass using two frame roughing and four frame finish rolling, rough rolling step, and the finish rolling stage adopts six roads
Secondary rolling, start rolling temperature are 1100 DEG C, and roughing finishing temperature is 1200 DEG C, and finish rolling finishing temperature is 940 DEG C；The crop and institute
State that back-end crop is respectively adopted cutter and lock is cut, the shearing force that the cutter and the lock are cut is 150t；
(5) finishing：Steel billet after step (4) is rolled is obtained final product after Double Dimension Flying Shears, cooling, inspection, and wherein, cooling is adopted
Combined with water-cooled and air cooling, the cooldown rate for water-cooled first being adopted to be not more than 8 DEG C/s is cooled to 320 DEG C, cooled down using air cooling
To 270 DEG C, then adopt water-cooled 220 DEG C to be cooled to the cooldown rate of 6 DEG C/s, then room temperature is cooled to using air cooling, the air cooling
For section cooling.
In the present embodiment, finished product steel rolling plate property testing result is：Thickness is that the steel plate average hardness of 20mm is
400HB, yield strength are 1230MPa, and tensile strength is 1340MPa, and elongation percentage is 10.1%.
Embodiment 5
A kind of production technology of the steel rolling described in the present embodiment, comprises the following steps：
(1) enter stove：Steel billet after continuous casting, cutting is transported in heating furnace, the casting speed control of the continuous casting exists
1.4m/min；
(2) heat：Step (1) steel billet is carried out preheating in heating furnace, is incubated, and the preheating temperature is 1300 DEG C, preheating
Time is 15min；The holding temperature is 1250 DEG C, and temperature retention time is 30min；
(3) tap：Steel billet after step (2) heating is tapped by extractor；
(4) roll：Steel billet after step (3) is tapped is rolled, and the rolling includes roughing, crop, finish rolling, cuts
Tail, wherein steel billet are rolled using four-pass using two frame roughing and four frame finish rolling, rough rolling step, and the finish rolling stage adopts six roads
Secondary rolling, start rolling temperature are 1200 DEG C, and roughing finishing temperature is 1150 DEG C, and finish rolling finishing temperature is 940 DEG C；The crop and institute
State that back-end crop is respectively adopted cutter and lock is cut, the shearing force that the cutter and the lock are cut is 150t；
(5) finishing：Steel billet after step (4) is rolled is obtained final product after Double Dimension Flying Shears, cooling, inspection, and wherein, cooling is adopted
Combined with water-cooled and air cooling, the cooldown rate for water-cooled first being adopted to be not more than 8 DEG C/s is cooled to 280 DEG C, cooled down using air cooling
To 230 DEG C, then adopt water-cooled 180 DEG C to be cooled to the cooldown rate of 4 DEG C/s, then room temperature is cooled to using air cooling, the air cooling
For section cooling.
In the present embodiment, finished product steel rolling plate property testing result is：Thickness is that the steel plate average hardness of 20mm is
408HB, yield strength are 1250MPa, and tensile strength is 1310MPa, and elongation percentage is 10.0%.
The above is only the preferred embodiment of the present invention, it is noted that it is right that above-mentioned preferred implementation is not construed as
The restriction of the present invention, protection scope of the present invention should be defined by claim limited range.For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, some improvements and modifications can also be made, these change
Enter and retouch also to should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of production technology of steel rolling, it is characterised in that：The production technology comprises the following steps：
(1) enter stove：Steel billet after continuous casting, cutting is transported in heating furnace, the casting speed control of the continuous casting is in 1.0-
1.4m/min；
(2) heat：Step (1) steel billet is carried out preheating in heating furnace, is incubated, and the preheating temperature is 1100-1300 DEG C, preheating
Time is 15-30min；The holding temperature is 1150-1250 DEG C, and temperature retention time is 30-40min；
(3) tap：Steel billet after step (2) heating is tapped by extractor；
(4) roll：Steel billet after step (3) is tapped is rolled, and the rolling includes roughing, crop, finish rolling, back-end crop；
(5) finishing：Steel billet after step (4) is rolled is obtained final product after Double Dimension Flying Shears, cooling, inspection.
2. the production technology of a kind of steel rolling according to claim 1, it is characterised in that：The pulling rate of step (1) continuous casting
Control is in 1.35m/min.
3. the production technology of a kind of steel rolling according to claim 1, it is characterised in that：Step (2) preheating temperature is
1150-1280 DEG C, preheating time is 20-30min；The holding temperature is 1150-1200 DEG C, and temperature retention time is 30-35min.
4. the production technology of a kind of steel rolling according to claim 1, it is characterised in that：In step (4) rolling, open rolling
Temperature is 1100-1200 DEG C.
5. the production technology of a kind of steel rolling according to claim 1, it is characterised in that：In step (4) rolling, steel billet
Using two frame roughing and four frame finish rolling, rough rolling step is rolled using four-pass, and the finish rolling stage adopts six passes.
6. the production technology of a kind of steel rolling according to claim 1, it is characterised in that：Step (4) the roughing finish to gauge temperature
Spend for 1150-1200 DEG C, the finish rolling finishing temperature is 890-940 DEG C.
7. the production technology of a kind of steel rolling according to claim 1, it is characterised in that：Step (4) crop and described
Back-end crop is respectively adopted cutter and lock is cut, and the shearing force that the cutter and the lock are cut is 120-150t.
8. the production technology of a kind of steel rolling according to claim 1, it is characterised in that：Step (5) cooling adopts water
Cold and air cooling is combined, and the cooldown rate for first adopting water-cooled to be not more than 8 DEG C/s is cooled to 280-320 DEG C, is being cooled down using air cooling
To 230-270 DEG C, then adopt water-cooled 180-220 DEG C to be cooled to the cooldown rate of 4-6 DEG C/s, then room is cooled to using air cooling
Temperature.
9. the production technology of a kind of steel rolling according to claim 8, it is characterised in that：The air cooling is section cooling.
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| CN201611154312.3A CN106493169A (en) | 2016-12-14 | 2016-12-14 | A kind of production technology of steel rolling |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109772907A (en) * | 2019-01-22 | 2019-05-21 | 江苏飞达环保科技有限公司 | A kind of uniform cooling means improving steel yield strength |
| CN112692053A (en) * | 2020-12-10 | 2021-04-23 | 四川德胜集团钒钛有限公司 | Steel rolling process of vanadium-titanium steel bar |
| CN113857240A (en) * | 2021-11-15 | 2021-12-31 | 瑞安市万川拉丝有限公司 | Production process of screw wire |
| CN114260313A (en) * | 2021-12-17 | 2022-04-01 | 江苏沙钢集团有限公司 | Production method of super-long plate blank with thickness of 5m or more |
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| CN113857240A (en) * | 2021-11-15 | 2021-12-31 | 瑞安市万川拉丝有限公司 | Production process of screw wire |
| CN114260313A (en) * | 2021-12-17 | 2022-04-01 | 江苏沙钢集团有限公司 | Production method of super-long plate blank with thickness of 5m or more |
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