CN106180195B - 508 millimeters of heavy caliber seamless steel pipe hot continuous rolling process - Google Patents
508 millimeters of heavy caliber seamless steel pipe hot continuous rolling process Download PDFInfo
- Publication number
- CN106180195B CN106180195B CN201610779369.6A CN201610779369A CN106180195B CN 106180195 B CN106180195 B CN 106180195B CN 201610779369 A CN201610779369 A CN 201610779369A CN 106180195 B CN106180195 B CN 106180195B
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- pipe
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 66
- 239000010959 steel Substances 0.000 title claims abstract description 66
- 238000005096 rolling process Methods 0.000 title claims abstract description 59
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 238000005242 forging Methods 0.000 claims abstract description 20
- 238000004513 sizing Methods 0.000 claims abstract description 14
- 238000010079 rubber tapping Methods 0.000 claims description 6
- 241000209094 Oryza Species 0.000 claims description 5
- 235000007164 Oryza sativa Nutrition 0.000 claims description 5
- 235000009566 rice Nutrition 0.000 claims description 5
- 239000000463 material Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 239000002699 waste material Substances 0.000 description 5
- 235000013339 cereals Nutrition 0.000 description 3
- VIKNJXKGJWUCNN-XGXHKTLJSA-N norethisterone Chemical compound O=C1CC[C@@H]2[C@H]3CC[C@](C)([C@](CC4)(O)C#C)[C@@H]4[C@@H]3CCC2=C1 VIKNJXKGJWUCNN-XGXHKTLJSA-N 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
- B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
- B21B19/04—Rolling basic material of solid, i.e. non-hollow, structure; Piercing, e.g. rotary piercing mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
- B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
- B21B19/06—Rolling hollow basic material, e.g. Assel mills
- B21B19/10—Finishing, e.g. smoothing, sizing, reeling
-
- 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
- B21B37/46—Roll speed or drive motor control
-
- 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
- B21B2261/00—Product parameters
- B21B2261/20—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2275/00—Mill drive parameters
- B21B2275/02—Speed
- B21B2275/04—Roll speed
Abstract
The invention discloses a kind of 508 millimeters of heavy caliber seamless steel pipe hot continuous rolling process, comprise the following steps：1）Blank is put into rotary heating furnace to be heated；2）When the temperature of blank is heated to more than 1250 degrees Celsius, perforated after blank is taken out into hollow billet；3）Hollow billet after perforation is subjected to PQF three-roll continuous rollings by tandem mill；4）Hollow forging after tandem rolling is subjected to de- pipe, then tube reducing and sizing are carried out to the external diameter of hollow forging by reducing mill stand；5）Steel pipe week after sizing is gone on cold bed and cooled down.Understand from the above, of the invention 508 millimeters of heavy caliber seamless steel pipe hot continuous rolling process realize a rolling production of 508 millimeters of heavy caliber seamless steel pipes, and can produce 20 ~ 30 per hour, hence it is evident that improve production efficiency.
Description
Technical field
The present invention relates to the field of 508 millimeters of heavy caliber seamless steel pipes of production, and in particular to a kind of 508 millimeters of heavy calibers without
Stitch steel pipe hot continuous rolling process.
Background technology
With development of oil industry, oil and natural gas conveyance conduit pipe quality requirement more and more higher.508 large-diameter steels
Pipe is because its caliber is excessive, and the limitation of technology, causes that expander can only be used within a very long time or uses welded tube work
Skill is produced, and directly can not directly be produced by blank.But secondary thermal expansion is used using expander technique steel pipe,
Steel pipe finished product can produce inside spin defect, cause wall unevenness, be only capable of production 10 or so per hour；In addition, if using weldering
Plumber's skill carries out producing 508 large-diameter steel pipes, and the grain size and performance of its welding position cannot be guaranteed compared with seamless steel pipe, so as to
Cause its service life very short.
The content of the invention
It is an object of the invention to：Overcome the deficiencies in the prior art, there is provided a kind of 508 millimeters of heavy caliber seamless steel pipes heat is even
Rolling production method, realizes a rolling production of 508 millimeters of heavy caliber seamless steel pipes, and can produce 20 ~ 30 per hour,
Significantly improve production efficiency；Seamless steel pipe is disposable perforation rolling production, and the grain size of steel pipe is uniform, and performance is guaranteed,
And the dimensional tolerance of steel pipe is small good with inside and outside surface quality, service life is high；By adjusting perforating apparatus and equipment for continuously rolling
Parameter, it is any one in special thick-walled pipe, thick-walled pipe, light-wall pipe and the limit light-wall pipe that bore is 508 millimeters so as to produce
Kind steel pipe.
The technical solution used in the present invention is：
508 millimeters of heavy caliber seamless steel pipe hot continuous rolling process, comprise the following steps：
1）Blank is put into rotary heating furnace to be heated；
2）When the temperature of blank is heated to more than 1250 degrees Celsius, perforated after blank is taken out into hollow billet；
3）Hollow billet after perforation is subjected to PQF three-roll continuous rollings by tandem mill, tandem rolling goes out the famine that external diameter is 530 millimeters
Pipe；
4）Hollow forging after tandem rolling is subjected to de- pipe, then tube reducing and sizing are carried out to the external diameter of hollow forging by reducing mill stand；
5）Steel pipe week after sizing is gone on cold bed and cooled down.
Further improvement project of the invention is the step 1）In, multistage temperature is divided into rotary heating furnace blank is entered
Row heating.
Further improvement project of the invention is, the blank from rotary heating furnace come out of the stove when, the core temperature of blank
Degree is differed with surface temperature no more than 10 degrees Celsius.
Further improvement project of the invention is the temperature of the first paragraph temperature to last 3rd section of the rotary heating furnace
Degree, gradually rises successively；Last two sections of temperature is identical with the tapping temperature of blank, and last 3rd section of temperature is than blank
Tapping temperature is high 20 degrees Celsius ~ and 30 degrees Celsius.
Further improvement project of the invention is the step 2）In, a diameter of 500 millimeters of blank, the top of perforation
A diameter of 476 millimeters of head, the length of top are 1062 millimeters, a diameter of 450 millimeters of push rod, and roll spacing during perforation is 441
Millimeter, lead are 512 millimeters, and the front-extending quantity of top is 240 millimeters, and roll angle is 8.5 degree, and roll rotational speed is at 32 turns per minute
In the range of ~ 45 turns, and it is 577 millimeters by making the external diameter of the hollow billet after perforation from different plugs, the wall thickness of hollow billet exists
In the range of 23 millimeters ~ 75 millimeters.
Further improvement project of the invention is the step 3）In, the rolling of tandem mill is set according to rolling parameter table
Parameter, tandem rolling is carried out to hollow billet, hollow billet is rolled into the hollow forging that external diameter is 530 millimeters.
Further improvement project of the invention is the step 4）In, hollow billet is rolled into famine by pipe-extracting rack in tandem mill
De- pipe is carried out by pipe-extracting rack after pipe, pipe-extracting rack carries out tube reducing to the external diameter of hollow forging while taking off pipe.
Further improvement project of the invention is the step 4）In, hollow forging is after the sizing of sizing mechanism, steel pipe
External diameter be 508 millimeters, the thickness of steel pipe is in the range of 9 millimeters ~ 60 millimeters.
The beneficial effects of the present invention are：
Firstth, 508 millimeters of heavy caliber seamless steel pipe hot continuous rolling process of the invention, realize 508 millimeters of heavy calibers
Rolling production of seamless steel pipe, and 20 ~ 30 can be produced per hour, hence it is evident that improve production efficiency.
Secondth, 508 millimeters of heavy caliber seamless steel pipe hot continuous rolling process of the invention, seamless steel pipe are disposable perforation
Rolling production, the grain size of steel pipe is uniform, and performance is guaranteed, and the dimensional tolerance of steel pipe is small good with inside and outside surface quality, makes
With life-span height.
3rd, 508 millimeters of heavy caliber seamless steel pipe hot continuous rolling process of the invention, by adjusting perforating apparatus and company
The parameter of rolling plant, so as to produce in special thick-walled pipe, thick-walled pipe, light-wall pipe and the limit light-wall pipe that bore is 508 millimeters
Any one steel pipe.
Embodiment：
The present invention comprises the following steps：
1）Blank is put into rotary heating furnace to be heated；
2）When the temperature of blank is heated to more than 1250 degrees Celsius, perforated after blank is taken out into hollow billet；
3）Hollow billet after perforation is subjected to PQF three-roll continuous rollings by tandem mill, tandem rolling goes out the famine that external diameter is 530 millimeters
Pipe；
4）Hollow forging after tandem rolling is subjected to de- pipe, then tube reducing and sizing are carried out to the external diameter of hollow forging by reducing mill stand；
5）Steel pipe week after sizing is gone on cold bed and cooled down.
The step 1）In, multistage temperature is divided into rotary heating furnace blank is heated.
The blank from rotary heating furnace come out of the stove when, the core temperature of blank differs with surface temperature to be taken the photograph no more than 10
Family name's degree.
The first paragraph temperature of the rotary heating furnace gradually rises successively to last 3rd section of temperature；Last two sections
Temperature is identical with the tapping temperature of blank, and last 3rd section of temperature higher than the tapping temperature of blank 20 degrees Celsius ~ 30 is Celsius
Degree.
The step 2）In, a diameter of 500 millimeters of blank, a diameter of 476 millimeters of the top of perforation, the length of top
Spend for 1062 millimeters, a diameter of 450 millimeters of push rod, roll spacing during perforation is 441 millimeters, and lead is 512 millimeters, before top
The amount of stretching be 240 millimeters, roll angle be 8.5 degree, roll rotational speed in the range of 32 turns per minute ~ 45 turns, and by selection not
Same plug makes the external diameter of the hollow billet after perforation be 577 millimeters, and the wall thickness of hollow billet is in the range of 23 millimeters ~ 75 millimeters.
The step 3）In, the rolling parameter of tandem mill is set according to rolling parameter table, tandem rolling is carried out to hollow billet, by hollow billet
It is rolled into the hollow forging that external diameter is 530 millimeters.
The step 4）In, pipe-extracting rack is taken off after hollow billet to be rolled into tandem mill hollow forging by pipe-extracting rack
Pipe, pipe-extracting rack carries out tube reducing to the external diameter of hollow forging while taking off pipe.
The step 4）In, hollow forging is after the sizing of sizing mechanism, and the external diameter of steel pipe is 508 millimeters, the thickness of steel pipe
Degree is in the range of 9 millimeters ~ 60 millimeters.
The division of thick-walled pipe and light-wall pipe：D/S（Outer diameter of steel pipes/steel pipe thickness）It is super thick pipe less than or equal to 10, D/S is 10
It is thick-walled pipe in the range of ~ 20, D/S is light-wall pipe in the range of 20 ~ 40, and D/S is limit light-wall pipe more than or equal to 40.
Embodiment 1
The steel pipe that external diameter is 508 millimeters, thickness is 9.5 millimeters is prepared, the steel pipe belongs to limit light-wall pipe（D/S=
53.47）.
The steel grade of blank is No. 20 steel, and the temperature that blank is come out of the stove from rotary heating furnace is 1290 degrees Celsius, rotary heating furnace
Inside it is divided into 7 sections of temperature to be heated, respectively is：900 degrees Celsius, 1100 degrees Celsius, 1220 degrees Celsius, 1240 degrees Celsius,
1310 degrees Celsius, 1290 degrees Celsius and 1290 degrees Celsius；From a diameter of 507.2 millimeters of plug when blank is perforated, after perforation
Hollow billet size for 577 millimeters of external diameter, 25.9 millimeters of thickness, tandem mill be carried out continuously 5 sections rolling connect, the rolling parameter such as institute of table 1
Show；Waste pipe size after tandem rolling is 530 millimeters of external diameter, 9.4 millimeters of thickness, lengthening coefficient 4.36；Pipe-extracting rack and sizing mill
Frame amounts to 5 framves, and wherein pipe-extracting rack is 3 framves, and reducing mill stand is 2 framves, wherein a minimum frame reducing mill stand 2B values（Pass size）
For 513.8 millimeters, the finished size after reducing mill stand be external diameter be 508 millimeters, thickness be 9.5 millimeters.
Table 1
| Roll section | 1 | 2 | 3 | 4 | 5 |
| Roller diameter（Millimeter） | 1125.50 | 1125.50 | 1113.00 | 1119.00 | 1120.50 |
| Rotating speed（Rpm） | 34.9 | 52.9 | 65.4 | 79.7 | 81.3 |
| Pass diameter（Millimeter） | 536.82 | 533.30 | 527.45 | 526.53 | 526.53 |
| Roll-force（Ton） | 469 | 406 | 325 | 294 | 87 |
Embodiment 2
The steel pipe that external diameter is 508 millimeters, thickness is 15 millimeters is prepared, the steel pipe belongs to light-wall pipe（D/S=33.87）.
The steel grade of blank is No. 20 steel, and the temperature that blank is come out of the stove from rotary heating furnace is 1280 degrees Celsius, rotary heating furnace
Inside it is divided into 7 sections of temperature to be heated, respectively is：900 degrees Celsius, 1100 degrees Celsius, 1220 degrees Celsius, 1240 degrees Celsius,
1310 degrees Celsius, 1280 degrees Celsius and 1280 degrees Celsius；Hollow billet size after perforation is 577 millimeters of external diameter, the milli of thickness 28.55
Rice, tandem mill are carried out continuously 5 sections of rollings and connected, and rolling parameter is as shown in table 1；Waste pipe size after tandem rolling is 530 millimeters of external diameter, thickness
14.84 millimeters of degree, pipe-extracting rack and reducing mill stand amount to 5 framves, and wherein pipe-extracting rack is 3 framves, and reducing mill stand is 2 framves, wherein most
Small frame reducing mill stand 2B values（Pass size）For 514.3 millimeters, the finished size after reducing mill stand be external diameter be 508 millimeters,
Thickness is 15 millimeters.
Embodiment 3
The steel pipe that external diameter footpath is 508 millimeters, thickness is 30 millimeters is prepared, the steel pipe belongs to thick-walled pipe（D/S=16.98）.
The steel grade of blank is No. 20 steel, and the temperature that blank is come out of the stove from rotary heating furnace is 1270 degrees Celsius, rotary heating furnace
Inside it is divided into 7 sections of temperature to be heated, respectively is：900 degrees Celsius, 1100 degrees Celsius, 1220 degrees Celsius, 1240 degrees Celsius,
1300 degrees Celsius, 1270 degrees Celsius and 1270 degrees Celsius；Hollow billet size after perforation is 577 millimeters of external diameter, the milli of thickness 41.55
Rice, tandem mill are carried out continuously 5 sections of rollings and connected, and rolling parameter is as shown in table 1；Waste pipe size after tandem rolling is 530 millimeters of external diameter, thickness
29.3 millimeters of degree, pipe-extracting rack and reducing mill stand amount to 4 framves, and wherein pipe-extracting rack is 2 framves, and reducing mill stand is 2 framves, wherein minimum
One frame reducing mill stand 2B values（Pass size）For 517 millimeters, the finished size after reducing mill stand be external diameter be 508 millimeters, thickness
For 30 millimeters.
Embodiment 4
The steel pipe that external diameter is 508 millimeters, thickness is 60 millimeters is prepared, the steel pipe belongs to special thick-walled pipe（D/S=8.49）.
The steel grade of blank is No. 20 steel, and the temperature that blank is come out of the stove from rotary heating furnace is 1260 degrees Celsius, rotary heating furnace
Inside it is divided into 7 sections of temperature to be heated, respectively is：900 degrees Celsius, 1100 degrees Celsius, 1220 degrees Celsius, 1240 degrees Celsius,
1290 degrees Celsius, 1260 degrees Celsius and 1260 degrees Celsius；Hollow billet size after perforation is 577 millimeters of external diameter, the milli of thickness 70.25
Rice, tandem mill are carried out continuously 5 sections of rollings and connected, and rolling parameter is as shown in table 1；Waste pipe size after tandem rolling is 530 millimeters of external diameter, thickness
59.4 millimeters of degree, pipe-extracting rack and reducing mill stand amount to 3 framves, and wherein pipe-extracting rack is 1 frame, and reducing mill stand is 2 framves, wherein minimum
One frame reducing mill stand 2B values（Pass size）For 518 millimeters, the finished size after reducing mill stand be external diameter be 508 millimeters, thickness
For 60 millimeters.
Embodiment 5
The steel pipe that external diameter is 508 millimeters, thickness is 9 millimeters is prepared, the steel pipe belongs to limit light-wall pipe（D/S=56.44）.
The steel grade of blank is No. 20 steel, and the temperature that blank is come out of the stove from rotary heating furnace is 1290 degrees Celsius, rotary heating furnace
Inside it is divided into 7 sections of temperature to be heated, respectively is：900 degrees Celsius, 1100 degrees Celsius, 1220 degrees Celsius, 1240 degrees Celsius,
1310 degrees Celsius, 1290 degrees Celsius and 1290 degrees Celsius；Hollow billet size after perforation is 577 millimeters of external diameter, 24.5 millimeters of thickness,
Tandem mill is carried out continuously 5 sections of rollings and connected, and rolling parameter is as shown in table 1；Waste pipe size after tandem rolling is 530 millimeters of external diameter, thickness
8.9 millimeters, pipe-extracting rack and reducing mill stand amount to 6 framves, and wherein pipe-extracting rack is 3 framves, and reducing mill stand is 3 framves, wherein minimum one
Frame reducing mill stand 2B values（Pass size）For 513.7 millimeters, the finished size after reducing mill stand be external diameter be 508 millimeters, thickness
For 9 millimeters.
Claims (7)
1.508 millimeters of heavy caliber seamless steel pipe hot continuous rolling process, it is characterised in that comprise the following steps：
1）Blank is put into rotary heating furnace to be heated；
2）When the temperature of blank is heated to more than 1250 degrees Celsius, perforated after blank is taken out into hollow billet；The step
Rapid 2）In, a diameter of 500 millimeters of blank, a diameter of 476 millimeters of the top of perforation, the length of top is 1062 millimeters,
A diameter of 450 millimeters of push rod, roll spacing during perforation are 441 millimeters, and lead is 512 millimeters, and the front-extending quantity of top is 240 millis
Rice, roll angle are 8.5 degree, and roll rotational speed makes to wear in the range of 32 turns per minute ~ 45 turns, and by the different plug of selection
The external diameter of hollow billet behind hole is 577 millimeters, and the wall thickness of hollow billet is in the range of 23 millimeters ~ 75 millimeters；
3）Hollow billet after perforation is subjected to PQF three-roll continuous rollings by tandem mill, tandem rolling goes out the hollow forging that external diameter is 530 millimeters；
4）Hollow forging after tandem rolling is subjected to de- pipe, then tube reducing and sizing are carried out to the external diameter of hollow forging by reducing mill stand；
5）Steel pipe week after sizing is gone on cold bed and cooled down.
2. 508 millimeters of heavy caliber seamless steel pipe hot continuous rolling process as claimed in claim 1, it is characterised in that：The step
Rapid 1）In, multistage temperature is divided into rotary heating furnace blank is heated.
3. 508 millimeters of heavy caliber seamless steel pipe hot continuous rolling process as claimed in claim 2, it is characterised in that：The base
Material from rotary heating furnace come out of the stove when, the core temperature of blank differs with surface temperature is no more than 10 degrees Celsius.
4. 508 millimeters of heavy caliber seamless steel pipe hot continuous rolling process as claimed in claim 3, it is characterised in that：The ring
The first paragraph temperature of shape heating furnace gradually rises successively to last 3rd section of temperature；Last two sections of temperature with blank
Tapping temperature is identical, and last 3rd section of temperature is higher than the tapping temperature of blank 20 degrees Celsius ~ 30 degrees Celsius.
5. 508 millimeters of heavy caliber seamless steel pipe hot continuous rolling process as claimed in claim 1, it is characterised in that：The step
Rapid 3）In, the rolling parameter of tandem mill is set according to rolling parameter table, tandem rolling is carried out to hollow billet, hollow billet is rolled into external diameter is
530 millimeters of hollow forging.
6. 508 millimeters of heavy caliber seamless steel pipe hot continuous rolling process as described in the wherein any one of claim 1 or 5, its
It is characterised by：The step 4）In, pipe-extracting rack is taken off after hollow billet to be rolled into tandem mill hollow forging by pipe-extracting rack
Pipe, pipe-extracting rack carries out tube reducing to the external diameter of hollow forging while taking off pipe.
7. 508 millimeters of heavy caliber seamless steel pipe hot continuous rolling process as claimed in claim 1, it is characterised in that：The step
Rapid 4）In, for hollow forging after the sizing of reducing mill stand, the external diameter of steel pipe is 508 millimeters, and the thickness of steel pipe is in 9 millimeters ~ 60 millis
In the range of rice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610779369.6A CN106180195B (en) | 2016-08-31 | 2016-08-31 | 508 millimeters of heavy caliber seamless steel pipe hot continuous rolling process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610779369.6A CN106180195B (en) | 2016-08-31 | 2016-08-31 | 508 millimeters of heavy caliber seamless steel pipe hot continuous rolling process |
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| Publication Number | Publication Date |
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| CN106180195A CN106180195A (en) | 2016-12-07 |
| CN106180195B true CN106180195B (en) | 2018-03-27 |
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ID=58087203
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| CN201610779369.6A Active CN106180195B (en) | 2016-08-31 | 2016-08-31 | 508 millimeters of heavy caliber seamless steel pipe hot continuous rolling process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111589870B (en) * | 2020-04-03 | 2022-04-15 | 包头钢铁（集团）有限责任公司 | Method for producing rare earth bearing seamless steel pipe by adopting phi 200mm round pipe blank |
| CN112238141B (en) * | 2020-09-29 | 2022-09-30 | 江苏天淮钢管有限公司 | Hot continuous rolling production method of 508 mm large-caliber extra-thick-wall seamless steel pipe |
| CN113996660B (en) * | 2021-09-28 | 2023-06-27 | 大冶特殊钢有限公司 | Pipe jacking deformation method of large pipe jacking machine |
| CN115415325A (en) * | 2022-08-26 | 2022-12-02 | 大冶特殊钢有限公司 | Manufacturing method for rolling seamless steel tube by high-carbon chromium bearing steel continuous casting round billet |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101077503A (en) * | 2007-07-02 | 2007-11-28 | 沈阳东方钢铁有限公司 | Method for producing large-sized seamless pipeline tube |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04182008A (en) * | 1990-11-14 | 1992-06-29 | Sumitomo Metal Ind Ltd | Method for preventing interior defect when producing seamless tube |
| JP4475429B2 (en) * | 2004-06-30 | 2010-06-09 | 住友金属工業株式会社 | Ni-base alloy tube and method for manufacturing the same |
| CN102228905A (en) * | 2011-04-03 | 2011-11-02 | 胡顺珍 | Production process of hot continuous rolling seamless steel tube with small caliber |
| CN104438334B (en) * | 2014-09-19 | 2016-11-23 | 衡阳华菱钢管有限公司 | Medium caliber 9Ni low temperature seamless steel pipe and production method |
| CN105478478A (en) * | 2015-11-19 | 2016-04-13 | 扬州诚德钢管有限公司 | Process for forming large-diameter seamless thick-wall and extra-strong steel pipes |
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- 2016-08-31 CN CN201610779369.6A patent/CN106180195B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101077503A (en) * | 2007-07-02 | 2007-11-28 | 沈阳东方钢铁有限公司 | Method for producing large-sized seamless pipeline tube |
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