CN104190740A - Production method of hot-rolling seamless steel pipe billet - Google Patents
Production method of hot-rolling seamless steel pipe billet Download PDFInfo
- Publication number
- CN104190740A CN104190740A CN201410336058.3A CN201410336058A CN104190740A CN 104190740 A CN104190740 A CN 104190740A CN 201410336058 A CN201410336058 A CN 201410336058A CN 104190740 A CN104190740 A CN 104190740A
- Authority
- CN
- China
- Prior art keywords
- rolling
- seamless steel
- production method
- hot rolled
- 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.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a production method of a hot-rolling seamless steel pipe billet. The production method is characterized by comprising the following steps of (1) steel making, (2) continuous casting and (3) pipe rolling and online heat treatment. The method is simple in step and convenient to operate, in the steel making procedure, specially-designed low-alkalinity acid synthesis refining slag is adopted to perform refining, brittle slag inclusion in steel is converted into plastic slag inclusion, and therefore in the cold drawing process of the hot-rolling seamless steel pipe billet for an oil cylinder, the pipe billet is not prone to being drawn to be cracked, and white spots, pits and other defects which affect the product quality and are caused by the brittle slag inclusion do not easily appear in the surface of a machined steel pipe. Therefore, the quality of the manufactured seamless steel pipe billet can be improved, and the pipe billet can be suitable for being used and popularized.
Description
Technical field
The present invention relates to a kind of production method of seamless steel tube blank, relate in particular to a kind of production method of hot rolled seamless steel tube pipe.
Background technology
Oil cylinder is generally by the technological process of production of solid drawn tube: hot rolled seamless steel tube pipe, and---cold-drawn becomes fished pipe in annealing heat treatment---pickling, phosphatization, saponification---.Wherein, the effect of annealing heat treatment step is the end product quality that yield strength and residual stress by reducing hot rolled seamless steel tube pipe, the uniformity of improving its plasticity and tissue improve solid drawn tube.
At present, a lot of solid drawn tube manufacturer when low-carbon (LC) oil cylinder use solid drawn tube aborning, has saved the annealing heat treatment step of pipe, has taked the production technology of direct cold-drawn after pickling, phosphatization, saponification.Although after using this production technology, production efficiency has improved in solid drawn tube manufacturer, has saved equipment purchasing expense, has reduced production cost.But the lumber recovery of solid drawn tube but significantly declines.
The reason that produces useless time solid drawn tube is main relevant with the quality in kind of hot rolled seamless steel tube pipe, although this hot rolled seamless steel tube pipe meets the requirement of concerned countries standard-GB/T8162, can not adapt to the instructions for use of direct cold-drawn production technology.This is mainly reflected in the following aspects:
1, middle low-carbon (LC) oil cylinder is generally As rolled by the condition of delivery of hot rolled seamless steel tube pipe, and its grain size is comparatively thick, and tissue turbulence, remnant tissue's stress are larger, extends on the low sidely, easily causes the generation of cold-drawn defect.
2, middle low-carbon (LC) oil cylinder is ± 12.5% with the wall thickness tolerance of hot rolled seamless steel tube pipe, and the margin of tolerance is larger.At wall thickness tolerance, extend during compared with Datong District in the situation that on the low side, easily cause the generation of cold-drawn defect.
3, GB/T8162 centering low-carbon (LC) oil cylinder with the non-metallic inclusion content in hot rolled seamless steel tube pipe without explicitly calling for.In the middle of low-carbon (LC) oil cylinder when distributing a fairly large number of brittle inclusion in hot rolled seamless steel tube pipe, not only easily at brittle inclusion place, form defect during cold-drawn, and after machined, brittle inclusion also easily comes off and forms the defect that " hickie, pit " etc. affects product quality.
Therefore, the requirement of the direct cold-drawn production technology of hot rolled seamless steel tube pipe for low-carbon (LC) oil cylinder in will fully meeting, hot rolled seamless steel tube pipe must meet following technical conditions: 1, extend better 2, wall thickness accuracy is higher, 3, the brittle inclusion content in steel is less.
Summary of the invention
One of object of the present invention is, for above-mentioned deficiency, to provide a kind of production method of hot rolled seamless steel tube pipe, to expect to solve the middle low-carbon (LC) oil cylinder that prior art makes, with hot rolled seamless steel tube pipe, can not meet the problem of the requirement of direct cold-drawn production technology.
The object of invention is achieved through the following technical solutions:
The production method of hot rolled seamless steel tube pipe, the method comprises the following steps:
(1) steel-making
(1a) molten iron pre-desulfurization, controls content≤0.015% into converter molten iron S;
(1b) converter smelting, during converter tapping, carbon content is C >=0.10%, and phosphorus content is P≤0.008%, and tapping temperature is 1620 ℃～1660 ℃, then tapping deoxidization alloying;
(1c) LF refining furnace refining, adopts the acid synthetic refining slag refining of low basicity, and the acid synthetic refining slag of described low basicity is comprised of 35～55 parts of SiO2 of weight portion meter, 25～40 parts of CaO, 10～20 parts of Al2O3;
(1d) carry out alloying operation, make molten steel;
(2) continuous casting
(2a) molten steel that adopts continuous casting long gate in conjunction with the protection pouring type that blows Ar protection and neonychium, step (1d) to be made carries out continuous casting;
(2b) in control, wrap liquid level, in the middle of continuous casting, unwrapping and watering liquid level is 550-650mm, and cast liquid level is 750-850mm, connects while watering liquid level lower than 450mm and forbids even watering;
(2c) control the degree of superheat of molten steel, tundish temperature is 1520 ℃～1545 ℃;
(2d) make continuous casting billet;
(3) tube rolling and online heat treatment
The continuous casting billet that uses tandem rolling unit hot-rolled step (2d) to make, perforation, adopt continuous rolling-tube unit rolling, hollow forging air cooling to 500 ℃ after rolling heats below again, insulation come out of the stove after sizing, sizing deflection is controlled at 10%～15%, and the wall thickness tolerance of steel pipe finished product is-10%～+ 10%, and after sizing, in air, heap is cooled to room temperature.
According to one embodiment of present invention, in step (1b), tapping deoxidization alloying adopts without Al deoxidization technique, and adds Si-Mn alloy 2.5～3.5Kg/t to carry out deoxidation.
According to one embodiment of present invention, when LF refining furnace finishes refining tapping in step (1c), quiet to blow front temperature be 1595 ℃～1605 ℃, the quiet time >=15min that blows after tapping, and control Argon intensity to keep molten steel to wriggle and molten steel must not be exposed.
According to one embodiment of present invention, the chemical composition that makes molten steel in step (1d) is by weight percentage: C:0.23%～0.28%, Si:0.17%～0.37%, Mn:0.70%～1.00%, P≤0.035%, S≤0.035%, Cr≤0.25%, Ni≤0.30%, Cu≤0.25%, surplus are Fe and other impurity.
While according to one embodiment of present invention, using tandem rolling unit hot rolling continuous casting billet in step (3), to go out the temperature of boiler tube be 1230 ℃-1270 ℃ to annular furnace.
According to one embodiment of present invention, in step (3), adopt the perforation of two-roller skew-rolling cone type piercer.
According to one embodiment of present invention, finishing temperature is 860 ℃-900 ℃ during rolling in step (3).
According to one embodiment of present invention, in step (3), adopt three roller sizings.
The present invention compares compared with prior art, has the following advantages and beneficial effect:
(1) method step of the present invention is simple, convenient operation, the present invention carries out refining by adopting custom-designed low basicity acidity to synthesize refining slag in steel making working procedure, brittle inclusion in steel is converted into plastic occluded foreignsubstance, thereby make oil cylinder with hot rolled seamless steel tube pipe in Cold Drawing Process, be difficult for pulling out split and machined after steel tube surface be not prone to the defect that is affected product quality by " hickie, pit " due to brittle inclusion etc., therefore can improve the quality of the seamless steel tube blank that the present invention makes.
(2) the present invention adopts tandem rolling unit rolled steel tube, guaranteed that the wall thickness tolerance of steel pipe is controlled at ± and 10%, make the oil cylinder of producing in Cold Drawing Process, be difficult for pulling out splitting with hot rolled seamless steel tube pipe.
(3) the present invention is controlled at 860-900 degree by finishing temperature, by refinement oil cylinder, by the grain size of the seamless hollow forging of hot rolling, comes the grain size of refinement finished product and the percentage elongation of raising finished product.
(4) online Technology for Heating Processing of the present invention has adopted the technique at the above 10-30 degree of AC3 temperature range sizing by hollow forging, with conventional in the online process of thermal treatment comparison of two-phase section, online Technology for Heating Processing of the present invention has not only kept the feature of two-phase section normalizing process crystal grain thinning, and because its sizing temperature is more than AC3, banded structure in steel pipe metallographic structure significantly improves, therefore the steel pipe after heat treatment also has obviously higher advantage of higher, the especially laterally extending rate of lower, the extending longitudinally rate of yield strength.
(5), in online Technology for Heating Processing of the present invention, after sizing, adopted the type of cooling of cooling in heap; Because the cooling velocity of cooling in heap is slower, therefore, after heat treatment, the percentage elongation of steel pipe improves, and internal stress obviously reduces.
(6) production cost of online Technology for Heating Processing of the present invention and general online Technology for Heating Processing is suitable, but after heat treatment the performance such as the yield strength of steel pipe, percentage elongation significantly better than the latter; The production cost of the online Technology for Heating Processing of the present invention is starkly lower than general off-line Technology for Heating Processing, and after heat treatment, the performance such as the yield strength of steel pipe, percentage elongation is slightly better than the latter.Therefore, it is lower that online Technology for Heating Processing of the present invention has production cost, the good advantage of product quality.
The specific embodiment
Below in conjunction with embodiment, the present invention is described in further detail:
Embodiment 1
The production method of hot rolled seamless steel tube pipe of the present invention mainly comprises steel-making, continuous casting and tube rolling and online heat treated step, and the seamless steel tube blank that this hot rolled seamless steel tube pipe production method is produced is mainly for the production of oil cylinder.
Production specification is the oil cylinder of 159*17 hot rolled seamless steel tube pipe, this oil cylinder with the chemical composition of hot rolled seamless steel tube pipe by weight percentage (%) in Table one, surplus is Fe and other impurity.
| C | Si | Mn | P | S | Cr | Ni | Cu |
| 0.24 | 0.28 | 0.76 | 0.013 | 0.014 | 0.03 | 0.03 | 0.06 |
Table one
In described steel-making step, first carry out the step of pre-desulphurised hot metal, then use 70T converter just to make steel water, enter converter molten iron and carry out molten iron pre-desulfurization processing, control S content≤0.015% into converter molten iron, for follow-up LF stove adopts low basicity slag, create conditions, then carry out following step:
Converter smelting, controls carbon content and phosphorus content during converter tapping, described carbon content is 0.10%, and phosphorus content is 0.008%.Control tapping temperature, described tapping temperature is 1620 ℃～1660 ℃ simultaneously.
Pre-deoxidation and preliminary alloying, control total oxygen content in steel, and the field trash being produced to reduce deoxidation products, for the removal of follow-up deoxidation and steel inclusion creates favorable conditions.Control the kind of steel inclusion, converter tapping deoxidation alloying adopts without Al deoxidization technique, and adding Si-Mn alloy 2.5～3.5Kg/t to carry out deoxidation, described Si-Mn alloy 2.5～3.5Kg/t represents to add in molten steel per ton Si-Mn alloy of 2.5～3.5 kilograms.
The refining of LF refining furnace, in LF refining furnace refining process, for strict kind, quantity, size and the form of controlling inclusion content in melting steel, the present invention adopts the acid synthetic refining slag of low basicity to carry out refining.The acid synthetic refining slag of described low basicity is comprised of 35～55 parts of SiO2 of weight portion meter, 25～40 parts of CaO, 10～20 parts of Al2O3.In the refining treatment process of molten steel, do not add Al, can reduce Al2O3 content in slag, when refining finishes, slag Al2O3 content is controlled at 10% left and right, and refining final purpose is that the Al2O3 in field trash is controlled to 20% left and right.Suitably improve tapping temperature, increase fluidity molten steel, keep bottom blowing Ar unimpeded, control and blow Ar intensity, avoid molten steel to seethe air-breathing.Deoxidation operation by force, makes foamed white slag fast, keeps white slag tapping, then adopts the prolongation quiet time of blowing of molten steel to impel steel inclusion floating.
Then carry out alloying operation, because the oil cylinder of different size is used in hot rolled seamless steel tube pipe, each chemical element component content is different, therefore by alloying, operates the content of each chemical element composition in capable of regulating molten steel, to become the oil cylinder of output different size hot rolled seamless steel tube pipe.The oil cylinder of all different sizes is with in hot rolled seamless steel tube pipe, and each chemical composition is by weight percentage all in following content range: C:0.23%～0.28%, Si:0.17%～0.37%, Mn:0.70%～1.00%, P≤0.035%, S≤0.035%, Cr≤0.25%, Ni≤0.30%, Cu≤0.25%, surplus are Fe and other impurity.The oil cylinder hot rolled seamless steel tube pipe of the present embodiment production specification 159*17, can operate each chemical composition of described molten steel is adjusted into by weight percentage by alloying: C:0.24%, Si:0.28%, Mn:0.76%, P:0.013%, S:0.014%, Cr:0.03%, Ni:0.03%, Cu:0.06%, surplus is Fe and other impurity.When refining finishes to tap, quietly blow front temperature controlling range and be: 1595 ℃～1605 ℃, after refining tapping, the quiet time of blowing is 15min, and control and blow Ar intensity to keep molten steel to wriggle and molten steel must not be exposed, the step by above steel-making can make molten steel.
In described continuous casting step, the molten steel that continuous casting adopts continuous casting long gate in conjunction with the protection pouring type that blows Ar protection and neonychium, steel-making step to be made carries out continuous casting, prevents suction nitrogen and the secondary oxidation of molten steel.In order to prevent that middle winding slag from bringing into, be mingled with, centering bag liquid level is strictly controlled, and in the middle of continuous casting, unwrapping and watering liquid level is 550-650mm, and cast liquid level is 750-850mm, connects while watering liquid level lower than 450mm and forbids even watering.Control the degree of superheat of molten steel, adopt Prepared by Low Superheat Pouring, tundish temperature is 1520～1545 ℃.Continuous casting covering slag adopts mould flux, and in casting process, pulling rate is controlled and stablized, the whole-process automatic water distribution of continuous casting secondary cooling water.Final production goes out chemical composition evenly and the steel inclusion low continuous casting billet of brittle inclusion content particularly.
In described tube rolling and online heat treatment step, the continuous casting billet that uses tandem rolling unit hot rolling continuous casting step to make, while using tandem rolling unit hot rolling continuous casting billet, to go out the temperature of boiler tube be 1230 ℃-1270 ℃ to annular furnace.Then adopt the perforation of two-roller skew-rolling cone type piercer, and adopt continuous rolling-tube unit rolling, adopt the mode of hot rolling to carry out in rolling step, finishing temperature is controlled as 860-900 ℃.Below hollow forging air cooling to 500 after rolling ℃, enter step heating-furnace and heat, then heating-up temperature is 835-865 ℃, insulation adopts three roller sizings after coming out of the stove, and the deflection of sizing is controlled at 10-15%.The wall thickness tolerance control range of steel pipe finished product is :-10%～+ 10%, and after sizing, in air, heap is chilled to room temperature.After flaw detection, inspection, pack, put in storage again.
The fished pipe making in the present embodiment is after metallographic, mechanics check, and its non-metallic inclusion content and mechanical property meet design requirement.Wherein, the Some Mechanical Properties check data of fished pipe is in Table two, and examination of nonmetallic inclusion data are in Table three.
Table two
Table three
Embodiment 2
The present embodiment is identical with the production method of embodiment 1, unique difference is the oil cylinder hot rolled seamless steel tube pipe that oil cylinder that the present embodiment produces is 168*15 by the specification of hot rolled seamless steel tube pipe, the oil cylinder of this specification with the chemical composition of hot rolled seamless steel tube pipe by weight percentage (%) in Table four, surplus is Fe and other impurity.
| C | Si | Mn | P | S | Cr | Ni | Cu |
| 0.25 | 0.28 | 0.80 | 0.012 | 0.013 | 0.03 | 0.03 | 0.07 |
Table four
In the present embodiment, during converter smelting, control carbon content and phosphorus content during converter tapping, described carbon content is 0.13%, and phosphorus content is 0.007%.While carrying out alloying operation, the oil cylinder that is 168*15 according to specification is adjusted the content of each chemical composition in molten steel with each chemical composition content in hot rolled seamless steel tube pipe, be about to each chemical composition in molten steel and be adjusted into by weight percentage: C:0.25%, Si:0.28%, Mn:0.80%, P:0.012%, S:0.013%, Cr:0.03%, Ni:0.03%, Cu:0.07%, surplus are Fe and other impurity.
The fished pipe that the present embodiment makes is after metallographic, mechanics check, and its non-metallic inclusion content and mechanical property meet design requirement.Wherein, the Some Mechanical Properties check data of fished pipe is in Table five, and examination of nonmetallic inclusion data are in Table six.
Table five
Table six
Embodiment 3
The present embodiment is identical with the production method of embodiment 1, unique difference is the oil cylinder hot rolled seamless steel tube pipe that oil cylinder that the present embodiment produces is 139.7*17 by the specification of hot rolled seamless steel tube pipe, the oil cylinder of this specification with the chemical composition of hot rolled seamless steel tube pipe by weight percentage (%) in Table seven, surplus is Fe and other impurity.
| C | Si | Mn | P | S | Cr | Ni | Cu |
| 0.25 | 0.30 | 0.83 | 0.015 | 0.014 | 0.03 | 0.02 | 0.06 |
Table seven
In the present embodiment, during converter smelting, control carbon content and phosphorus content during converter tapping, described carbon content is 0.14%, and phosphorus content is 0.008%.While carrying out alloying operation, the oil cylinder that is 139.7*17 according to specification is adjusted the content of each chemical composition in molten steel with each chemical composition content in hot rolled seamless steel tube pipe, be about to each chemical composition in molten steel and be adjusted into by weight percentage: C:0.25%, Si:0.30%, Mn:0.83%, P:0.015%, S:0.014%, Cr:0.03%, Ni:0.02%, Cu:0.06%, surplus are Fe and other impurity.
The fished pipe that the present embodiment makes is after metallographic, mechanics check, and its non-metallic inclusion content and mechanical property meet design requirement.Wherein, the Some Mechanical Properties check data of fished pipe is in Table eight, and examination of nonmetallic inclusion data are in Table nine.
Table eight
Table nine
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. the production method of hot rolled seamless steel tube pipe, is characterized in that the method comprises the following steps:
(1) steel-making
(1a) molten iron pre-desulfurization, controls content≤0.015% into converter molten iron S;
(1b) converter smelting, during converter tapping, carbon content is C >=0.10%, and phosphorus content is P≤0.008%, and tapping temperature is 1620 ℃～1660 ℃, then tapping deoxidization;
(1c) LF refining furnace refining, adopts the acid synthetic refining slag refining of low basicity, and the acid synthetic refining slag of described low basicity is comprised of 35～55 parts of SiO2 of weight portion meter, 25～40 parts of CaO, 10～20 parts of Al2O3;
(1d) carry out alloying operation, make molten steel;
(2) continuous casting
(2a) adopt continuous casting long gate, in conjunction with the protection pouring type that blows Ar protection and neonychium, molten steel is carried out to continuous casting;
(2b) in control, wrap liquid level, in the middle of continuous casting, unwrapping and watering liquid level is 550-650mm, and cast liquid level is 750-850mm, connects while watering liquid level lower than 450mm and forbids even watering;
(2c) control the degree of superheat of molten steel, tundish temperature is 1520 ℃～1545 ℃;
(2d) make continuous casting billet;
(3) tube rolling and online heat treatment
Use tandem rolling unit hot rolling continuous casting billet, perforation, adopt continuous rolling-tube unit rolling, hollow forging air cooling to 500 ℃ after rolling heats below again, insulation come out of the stove after sizing, sizing deflection is controlled at 10%～15%, and the wall thickness tolerance of steel pipe finished product is-10%～+ 10%, and after sizing, in air, heap is cooled to room temperature.
2. according to the production method of a kind of hot rolled seamless steel tube pipe claimed in claim 1, it is characterized in that in step (1b), tapping deoxidization adopts without Al deoxidization technique, and add Si-Mn alloy 2.5～3.5Kg/t to carry out deoxidation.
3. according to the production method of hot rolled seamless steel tube pipe claimed in claim 1, while it is characterized in that in step (1c), LF refining furnace finishes refining tapping, it is quiet that to blow front temperature be 1595 ℃～1605 ℃, quiet time >=the 15min that blows after tapping, and control Argon intensity to keep molten steel to wriggle and molten steel must not be exposed.
4. according to the production method of hot rolled seamless steel tube pipe claimed in claim 1, it is characterized in that the chemical composition that makes molten steel in step (1d) is by weight percentage: C:0.23%～0.28%, Si:0.17%～0.37%, Mn:0.70%～1.00%, P≤0.035%, S≤0.035%, Cr≤0.25%, Ni≤0.30%, Cu≤0.25%, surplus are Fe and other impurity.
5. according to the production method of hot rolled seamless steel tube pipe claimed in claim 1, while it is characterized in that using tandem rolling unit hot rolling continuous casting billet in step (3), to go out the temperature of boiler tube be 1230 ℃-1270 ℃ to annular furnace.
6. according to the production method of hot rolled seamless steel tube pipe claimed in claim 1, it is characterized in that adopting two-roller skew-rolling cone type piercer to bore a hole in step (3).
7. according to the production method of hot rolled seamless steel tube pipe claimed in claim 1, while it is characterized in that the middle rolling of step (3), finishing temperature is 860 ℃-900 ℃.
8. according to the production method of hot rolled seamless steel tube pipe claimed in claim 1, it is characterized in that employing three roller sizings in step (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410336058.3A CN104190740B (en) | 2014-07-15 | 2014-07-15 | The production method of hot rolled seamless steel tube pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410336058.3A CN104190740B (en) | 2014-07-15 | 2014-07-15 | The production method of hot rolled seamless steel tube pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104190740A true CN104190740A (en) | 2014-12-10 |
| CN104190740B CN104190740B (en) | 2016-04-13 |
Family
ID=52076187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410336058.3A Expired - Fee Related CN104190740B (en) | 2014-07-15 | 2014-07-15 | The production method of hot rolled seamless steel tube pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104190740B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106064183A (en) * | 2016-07-18 | 2016-11-02 | 内蒙古北方重工业集团有限公司 | A kind of slow cooling method containing Cr, Mo alloy large-size extruding heavy wall steps of manufacturing blanks |
| CN107236856A (en) * | 2017-06-28 | 2017-10-10 | 安徽华飞机械铸锻有限公司 | A kind of seamless steel pipe Technology for Heating Processing |
| CN108531806A (en) * | 2018-04-17 | 2018-09-14 | 东北大学 | A kind of high-strength tenacity hot rolled seamless steel tube and preparation method thereof |
| CN110735091A (en) * | 2019-11-05 | 2020-01-31 | 天津钢管制造有限公司 | Method for improving impact power of J K55 steel-grade oil well pipe by treating alloy steel with micro-titanium |
| CN112238141A (en) * | 2020-09-29 | 2021-01-19 | 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 |
| CN112593145A (en) * | 2020-11-10 | 2021-04-02 | 鞍钢股份有限公司 | Hot-rolled Q345 seamless steel tube and manufacturing method thereof |
| CN112725694A (en) * | 2020-12-18 | 2021-04-30 | 本钢板材股份有限公司 | Hot-rolled pickled steel coil for improving flattening performance of welded pipe after cold drawing and production method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3259975A (en) * | 1963-12-19 | 1966-07-12 | Combustion Eng | Tube manufacture |
| JPS5623306A (en) * | 1979-08-01 | 1981-03-05 | Sumitomo Metal Ind Ltd | Production of seamless steel pipe |
| CN1775465A (en) * | 2005-11-24 | 2006-05-24 | 天津钢管集团有限公司 | Method and equipment for manufacturing high-alloy seamless steel pipe |
| CN101033513A (en) * | 2006-03-10 | 2007-09-12 | 鞍钢股份有限公司 | Method of manufacturing seamless steel pipe for inhibiting hydrogen resulted abscission layer defect |
| CN101358323A (en) * | 2008-08-26 | 2009-02-04 | 攀钢集团成都钢铁有限责任公司 | Seamless steel tube for 27SiMnB steel, cylinder and production method thereof |
| CN102181800A (en) * | 2011-04-13 | 2011-09-14 | 安徽天大石油管材股份有限公司 | Fire-resistant seamless steel pipe for building and machining method thereof |
-
2014
- 2014-07-15 CN CN201410336058.3A patent/CN104190740B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3259975A (en) * | 1963-12-19 | 1966-07-12 | Combustion Eng | Tube manufacture |
| JPS5623306A (en) * | 1979-08-01 | 1981-03-05 | Sumitomo Metal Ind Ltd | Production of seamless steel pipe |
| CN1775465A (en) * | 2005-11-24 | 2006-05-24 | 天津钢管集团有限公司 | Method and equipment for manufacturing high-alloy seamless steel pipe |
| CN101033513A (en) * | 2006-03-10 | 2007-09-12 | 鞍钢股份有限公司 | Method of manufacturing seamless steel pipe for inhibiting hydrogen resulted abscission layer defect |
| CN101358323A (en) * | 2008-08-26 | 2009-02-04 | 攀钢集团成都钢铁有限责任公司 | Seamless steel tube for 27SiMnB steel, cylinder and production method thereof |
| CN102181800A (en) * | 2011-04-13 | 2011-09-14 | 安徽天大石油管材股份有限公司 | Fire-resistant seamless steel pipe for building and machining method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 储满生: "《钢铁冶金原燃料及辅助材料》", 31 January 2010, article "精炼渣", pages: 384 * |
| 方剑等: "N80级非调质油井管用钢36-49Mn2V连轧和定径工艺对组织和性能的影响", 《特殊钢》, vol. 33, no. 3, 30 June 2012 (2012-06-30), pages 54 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106064183A (en) * | 2016-07-18 | 2016-11-02 | 内蒙古北方重工业集团有限公司 | A kind of slow cooling method containing Cr, Mo alloy large-size extruding heavy wall steps of manufacturing blanks |
| CN107236856A (en) * | 2017-06-28 | 2017-10-10 | 安徽华飞机械铸锻有限公司 | A kind of seamless steel pipe Technology for Heating Processing |
| CN107236856B (en) * | 2017-06-28 | 2018-12-21 | 安徽华飞机械铸锻有限公司 | A kind of seamless steel pipe heat treatment process |
| CN108531806A (en) * | 2018-04-17 | 2018-09-14 | 东北大学 | A kind of high-strength tenacity hot rolled seamless steel tube and preparation method thereof |
| CN110735091A (en) * | 2019-11-05 | 2020-01-31 | 天津钢管制造有限公司 | Method for improving impact power of J K55 steel-grade oil well pipe by treating alloy steel with micro-titanium |
| CN112238141A (en) * | 2020-09-29 | 2021-01-19 | 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 |
| CN112593145A (en) * | 2020-11-10 | 2021-04-02 | 鞍钢股份有限公司 | Hot-rolled Q345 seamless steel tube and manufacturing method thereof |
| CN112725694A (en) * | 2020-12-18 | 2021-04-30 | 本钢板材股份有限公司 | Hot-rolled pickled steel coil for improving flattening performance of welded pipe after cold drawing and production method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104190740B (en) | 2016-04-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104190740B (en) | The production method of hot rolled seamless steel tube pipe | |
| CN104073739B (en) | A kind of manufacture method of heat-resistance stainless steel seamless steel pipe and rustless steel and seamless steel pipe | |
| CN102416404B (en) | Method for producing cold-rolled steel strips | |
| US20180056348A1 (en) | Method for Producing Polishing Bar Made of Valve Steel 53Cr21Mn9Ni4N | |
| US20200056254A1 (en) | Method for manufacturing thin-specification high-ti wear-resistant steel nm450 | |
| CN107964624A (en) | A kind of yield strength 500MPa level structure steel and preparation method thereof | |
| CN112011737B (en) | 390 MPa-grade-20-DEG C-resistant hot-rolled angle steel for bridge structure and production method thereof | |
| CN105803152B (en) | The center porosity control method of 30CrMo circular pipe blank steel strands | |
| CN103572025A (en) | Production method of low-cost X52 pipeline steel and pipeline steel | |
| CN104131238B (en) | High molding high durable Ultra-thin hot rolled steel plate and CSP production technology thereof | |
| CN104451379A (en) | High-strength low-alloy niobium-vanadium structural steel and preparation method thereof | |
| JP2023505172A (en) | Hot-rolled H-shaped steel based on beam blank rolling forming and its preparation method | |
| CN105274429A (en) | Production method for alloy filament | |
| CN112605353A (en) | Ultra-large vertical continuous casting billet and production method thereof, and forging and production method thereof | |
| CN102330018A (en) | Seamless steel tube used for thick-wall petroleum casing collar material and production method thereof | |
| CN113862552A (en) | Steel wire rod for welding and preparation method thereof | |
| CN105239011A (en) | Manufacturing method for anti-abrasion seamless steel pipe for concrete pump truck | |
| CN103509925B (en) | A kind of low cost production thereof promoting Q345R steel plate inspection qualification rate | |
| CN103741019B (en) | A kind of hot rolled strip and production method thereof | |
| CN107641762A (en) | 340MPa levels have the Hot Rolling Automobile structural steel and iron and manufacture method of excellent cold forming capability | |
| CN104328348B (en) | 800MPa level cold-rolled biphase steel and production method thereof | |
| CN116240446A (en) | Production method of high-strength enamel steel | |
| CN104789871A (en) | 27SiMn seamless steel tube for thick-wall cold-drawn hydraulic cylinder barrel and preparation method | |
| CN103160751B (en) | A bulb steel with a yield strength of 590MPa grade and a production method thereof | |
| CN105200311A (en) | 4J42 alloy wire for discharge tube electrode and production method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160413 Termination date: 20170715 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |