CN105234200A - On-line tube-expanding production process of large-diameter seamless steel tubes - Google Patents
On-line tube-expanding production process of large-diameter seamless steel tubes Download PDFInfo
- Publication number
- CN105234200A CN105234200A CN201510798426.0A CN201510798426A CN105234200A CN 105234200 A CN105234200 A CN 105234200A CN 201510798426 A CN201510798426 A CN 201510798426A CN 105234200 A CN105234200 A CN 105234200A
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- China
- Prior art keywords
- tube
- expanding
- rolling
- seamless steel
- continuous casting
- 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.)
- Pending
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 26
- 239000010959 steel Substances 0.000 title claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 238000009749 continuous casting Methods 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 238000005096 rolling process Methods 0.000 claims abstract description 13
- 238000009785 tube rolling Methods 0.000 claims abstract description 8
- 239000007787 solid Substances 0.000 claims abstract description 4
- 238000005516 engineering process Methods 0.000 claims description 13
- 238000005242 forging Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 abstract description 6
- 239000002918 waste heat Substances 0.000 abstract description 2
- 238000005098 hot rolling Methods 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 230000033764 rhythmic process Effects 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
-
- 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
- B21B19/08—Enlarging tube diameter
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention relates to the producing and manufacturing process of large-diameter seamless steel tubes, in particular to an on-line tube-expanding production process of the large-diameter seamless steel tubes. The on-line tube-expanding production process comprises the steps of blank preparing, tube blank heating, hole piercing, tube rolling and on-line tube expanding. In the step of blank preparing, continuous casting solid tubes are cut off to form continuous casting round tube blanks; in the step of tube blank heating, the continuous casting round tube blanks are placed on a circular furnace so as to be heated; in the step of hole piercing, the heated continuous casting round tube blanks are pierced by a two-roller cross-rolling piercer so as to form hollow tubular billets; in the step of tube rolling, the hollow tubular billets are conveyed to a two-roller skew rolling tube mill so as to undergo expanding and uniform wall rolling and to form pierced billets; in the step of on-line tube expanding, the rolled pierced billets are directly turned to a stop device of an on-line hot tube expanding machine through a backstage turning device of the two-roller skew rolling tube mill so as to undergo expanding and reeling, and finally the large-diameter seamless steel tubes are formed. According to the invention, on-line expanding is carried out by utilizing waste heat of the hollow billets after hot rolling and hole piercing are carried out, the secondary heating cost is saved, the secondary heating burning loss is avoided, and the yield is high. The expanding time is controlled within 6-9 minutes according to the length of the steel tubes, and the short-procedure production process of the large-diameter seamless steel tubes is achieved.
Description
Technical field
The present invention relates to heavy caliber seamless steel pipe manufacturing process, particularly relate to online heat and expand technique.
Background technology
Heavy caliber seamless steel pipe tradition expander technique is off-line expanding technology, intermediate frequency furnace (electric induction coil) is adopted to carry out local heat to steel pipe, when temperature reaches technological requirement (Ac3+50-100 DEG C), under the effect of working cylinder, by pusher baffle plate promote steel pipe by expansion mould realize steel pipe expanding, subtract wall.
The defect that existing off-line expanding technology exists:
1. the hollow billet preparatory period longer (annealing, aligning, sawing end to end, endoporus polishing etc.) before expander;
2. limit heating edge is expanding, and production efficiency is low, cost is high, material structure coarse grains after expander.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, providing a kind of heavy caliber seamless steel pipe that a kind of efficiency is high, cost is low online expander production technology.
The object of the present invention is achieved like this: the online expander production technology of a kind of heavy caliber seamless steel pipe, comprises the following steps:
1) blank prepares: cut off by continuous casting solid pipe, forms continuous casting circular tube blank;
2) heating of pipe blank: continuous casting circular tube blank is placed in annular furnace heating;
3) bore a hole: by the continuous casting circular tube blank after heating through the perforation of Mannesmann piercing machine, form hollow hollow billet;
4) tube rolling: hollow hollow billet is delivered to two-roller skew-rolling pipe mill through expanding equal wall rolling, forms hollow forging;
5) online expander: the hollow forging after tube rolling directly turns over the stop gauge to online hot tube expanding machine through two-roller skew-rolling pipe mill backstage turn-down rig, carries out expanding, expansion, is shaped.
Online expander in this technique adopts the online thermal expansion machine of heavy caliber seamless steel pipe (patent No. is 201110072068.7), this apparatus arrangement is after Mannesmann piercing, pipe mill, after utilizing hot-puncturing process, the waste heat of hollow hollow billet carries out expanding online, save post bake cost and avoid post bake scaling loss, lumber recovery is high.According to the different expander time controling of steel pipe length at 6 ~ 9min, achieve the productive technology of short flow of heavy caliber seamless steel pipe.Burning optimization on line technique can be utilized for the steel pipe such as carbon steel, low-alloy steel, make steel tube performance reach customer requirement.
As improvement of the present invention, step 2) in annular furnace heating-up temperature be 1220 ~ 1280 DEG C.This heating-up temperature makes pipe obtain homogeneous austenite structure, and perforated plastic is best, is beneficial to distortion.
As a further improvement on the present invention, in step 3), the temperature of continuous casting circular tube blank is 1150 ~ 1200 DEG C.Improve hollow billet as far as possible and transmit rhythm, reduce temperature loss and oxidation, be beneficial to distortion, reduce hollow billet defect.
As a further improvement on the present invention, the temperature of step 4) hollow core hollow billet is 1100 ~ 1150 DEG C.Improve hollow billet as far as possible and transmit rhythm, reduce temperature loss and oxidation, be beneficial to distortion, reduce hollow billet defect.
As a further improvement on the present invention, in step 5), the temperature of hollow forging is 850 ~ 1050 DEG C.Improve hollow billet as far as possible and transmit rhythm, reduce temperature loss and oxidation, be beneficial to distortion, reduce hollow billet defect.
Detailed description of the invention
The online expander production technology of heavy caliber seamless steel pipe, comprises the following steps:
1) blank prepares: cut off by continuous casting solid pipe, forms continuous casting circular tube blank;
2) heating of pipe blank: continuous casting circular tube blank is placed in annular furnace heating, annular furnace heating-up temperature is 1220 ~ 1280 DEG C;
3) bore a hole: after the heating, the continuous casting circular tube blank by temperature being 1150 ~ 1200 DEG C, through the perforation of Mannesmann piercing machine, forms hollow hollow billet;
4) tube rolling: be that the hollow hollow billet of 1100 ~ 1150 DEG C delivers to two-roller skew-rolling pipe mill through expanding equal wall rolling by temperature, form hollow forging;
5) online expander: after tube rolling, be that the hollow forging of 850 ~ 1050 DEG C directly turns over stop gauge to online hot tube expanding machine through two-roller skew-rolling pipe mill backstage turn-down rig by temperature, carry out expanding, expansion, be shaped, after making shaping, the dimensional accuracy of steel pipe reaches customer requirement.
Claims (5)
1. the online expander production technology of heavy caliber seamless steel pipe, is characterized in that comprising the following steps:
1) blank prepares: cut off by continuous casting solid pipe, forms continuous casting circular tube blank;
2) heating of pipe blank: continuous casting circular tube blank is placed in annular furnace heating;
3) bore a hole: by the continuous casting circular tube blank after heating through the perforation of Mannesmann piercing machine, form hollow hollow billet;
4) tube rolling: hollow hollow billet is delivered to two-roller skew-rolling pipe mill, through expanding equal wall rolling, forms hollow forging;
5) online expander: the hollow forging after tube rolling directly turns over the stop gauge to online hot tube expanding machine through two-roller skew-rolling pipe mill backstage turn-down rig, carries out expanding, expansion, is shaped.
2. the online expander production technology of heavy caliber seamless steel pipe according to claim 1, is characterized in that: step 2) in annular furnace heating-up temperature be 1220 ~ 1280 DEG C.
3. the online expander production technology of heavy caliber seamless steel pipe according to claim 1, is characterized in that: in step 3), the temperature of continuous casting circular tube blank is 1150 ~ 1200 DEG C.
4. the online expander production technology of heavy caliber seamless steel pipe according to claim 1, is characterized in that: the temperature of step 4) hollow core hollow billet is 1100 ~ 1150 DEG C.
5. the online expander production technology of heavy caliber seamless steel pipe according to claim 1, is characterized in that: in step 5), the temperature of hollow forging is 850 ~ 1050 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510798426.0A CN105234200A (en) | 2015-11-19 | 2015-11-19 | On-line tube-expanding production process of large-diameter seamless steel tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510798426.0A CN105234200A (en) | 2015-11-19 | 2015-11-19 | On-line tube-expanding production process of large-diameter seamless steel tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105234200A true CN105234200A (en) | 2016-01-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510798426.0A Pending CN105234200A (en) | 2015-11-19 | 2015-11-19 | On-line tube-expanding production process of large-diameter seamless steel tubes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105234200A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107803411A (en) * | 2017-09-19 | 2018-03-16 | 扬州诚德钢管有限公司 | A kind of manufacture method of super austenitic stainless steel seamless large-diameter pipes |
| CN110404972A (en) * | 2019-07-15 | 2019-11-05 | 扬州诚德钢管有限公司 | A kind of production method for the seamless steel pipe that diameter is 1422mm |
| CN111001659A (en) * | 2019-12-11 | 2020-04-14 | 扬州诚德钢管有限公司 | Production method of seamless steel tube with diameter of 1700-2000mm |
| CN111112337A (en) * | 2019-12-16 | 2020-05-08 | 太原重工工程技术有限公司 | Method for manufacturing seamless steel pipe with large-diameter wall ratio |
| CN113172116A (en) * | 2021-04-25 | 2021-07-27 | 衡阳华菱连轧管有限公司 | Preparation method of seamless steel pipe, seamless steel pipe and drill rod structure |
| 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 (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06198312A (en) * | 1990-12-14 | 1994-07-19 | Kawasaki Steel Corp | Manufacture of seamless steel tube |
| CN101318200A (en) * | 2008-07-02 | 2008-12-10 | 中冶东方工程技术有限公司 | Precision rolling process for heavy-caliber skew rolling reeling weldless steel tube |
| CN101921957A (en) * | 2010-07-09 | 2010-12-22 | 天津钢管集团股份有限公司 | Method for manufacturing high-grade anti-corrosion seamless steel tube with large diameter ranging from phi460.0 mm to 720.0mm |
| CN102039311A (en) * | 2010-09-29 | 2011-05-04 | 江苏诚德钢管股份有限公司 | Short-flow longitudinal rolling production method for small-bore high-alloy seamless steel pipe |
| CN102179450A (en) * | 2011-03-24 | 2011-09-14 | 扬州诚德钢管有限公司 | Hot expanding process for seamless steel tube, and hot tube expanding machine |
| CN102873512A (en) * | 2012-09-29 | 2013-01-16 | 攀钢集团成都钢钒有限公司 | Manufacture method of large-caliber medium-and-thick-wall seamless steel tube for nuclear power plant |
| CN104368623A (en) * | 2014-11-29 | 2015-02-25 | 攀钢集团成都钢钒有限公司 | Production method of large-diameter stainless steel seamless steel pipe |
-
2015
- 2015-11-19 CN CN201510798426.0A patent/CN105234200A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06198312A (en) * | 1990-12-14 | 1994-07-19 | Kawasaki Steel Corp | Manufacture of seamless steel tube |
| CN101318200A (en) * | 2008-07-02 | 2008-12-10 | 中冶东方工程技术有限公司 | Precision rolling process for heavy-caliber skew rolling reeling weldless steel tube |
| CN101921957A (en) * | 2010-07-09 | 2010-12-22 | 天津钢管集团股份有限公司 | Method for manufacturing high-grade anti-corrosion seamless steel tube with large diameter ranging from phi460.0 mm to 720.0mm |
| CN102039311A (en) * | 2010-09-29 | 2011-05-04 | 江苏诚德钢管股份有限公司 | Short-flow longitudinal rolling production method for small-bore high-alloy seamless steel pipe |
| CN102179450A (en) * | 2011-03-24 | 2011-09-14 | 扬州诚德钢管有限公司 | Hot expanding process for seamless steel tube, and hot tube expanding machine |
| CN102873512A (en) * | 2012-09-29 | 2013-01-16 | 攀钢集团成都钢钒有限公司 | Manufacture method of large-caliber medium-and-thick-wall seamless steel tube for nuclear power plant |
| CN104368623A (en) * | 2014-11-29 | 2015-02-25 | 攀钢集团成都钢钒有限公司 | Production method of large-diameter stainless steel seamless steel pipe |
Non-Patent Citations (1)
| Title |
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| 孙念光等: "大口径钢管在线热扩径机", 《重型机械》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107803411A (en) * | 2017-09-19 | 2018-03-16 | 扬州诚德钢管有限公司 | A kind of manufacture method of super austenitic stainless steel seamless large-diameter pipes |
| CN110404972A (en) * | 2019-07-15 | 2019-11-05 | 扬州诚德钢管有限公司 | A kind of production method for the seamless steel pipe that diameter is 1422mm |
| CN111001659A (en) * | 2019-12-11 | 2020-04-14 | 扬州诚德钢管有限公司 | Production method of seamless steel tube with diameter of 1700-2000mm |
| CN111112337A (en) * | 2019-12-16 | 2020-05-08 | 太原重工工程技术有限公司 | Method for manufacturing seamless steel pipe with large-diameter wall ratio |
| CN113172116A (en) * | 2021-04-25 | 2021-07-27 | 衡阳华菱连轧管有限公司 | Preparation method of seamless steel pipe, seamless steel pipe and drill rod structure |
| 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 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160113 |