CN104190740B - The production method of hot rolled seamless steel tube pipe - Google Patents
The production method of hot rolled seamless steel tube pipe Download PDFInfo
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- CN104190740B CN104190740B CN201410336058.3A CN201410336058A CN104190740B CN 104190740 B CN104190740 B CN 104190740B CN 201410336058 A CN201410336058 A CN 201410336058A CN 104190740 B CN104190740 B CN 104190740B
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Abstract
The invention discloses a kind of production method of hot rolled seamless steel tube pipe, it is characterized in that the method comprises the following steps: (1) makes steel; (2) continuous casting; (3) tube rolling and burning optimization on line.Method step of the present invention is simple, convenient operation, the present invention carries out refining by the acid lab-prepared refining slag of the custom-designed low alkalinity of employing in steel making working procedure, brittle inclusion in steel is converted into plastic occluded foreignsubstance, thus oil cylinder hot rolled seamless steel tube pipe is not easily pulled out in Cold Drawing Process split and after machined, steel tube surface not easily occurs that " hickie, pit " caused by brittle inclusion etc. affects the defect of product quality, therefore can improve the quality of the seamless steel tube blank that the present invention obtains, be applicable to promoting the use of.
Description
Technical field
The present invention relates to a kind of production method of seamless steel tube blank, particularly relate to a kind of production method of hot rolled seamless steel tube pipe.
Background technology
The technological process of production of oil cylinder solid drawn tube is generally: hot rolled seamless steel tube pipe, and---cold-drawn becomes fished pipe in annealing heat treatment---pickling, phosphatization, saponification---.Wherein, the end product quality that the effect of heat treatment step of annealing is yield strength by reducing hot rolled seamless steel tube pipe and residual stress, the uniformity improving its plasticity and tissue improves solid drawn tube.
At present, a lot of solid drawn tube manufacturer aborning low-carbon (LC) oil cylinder solid drawn tube time, eliminate the annealing heat treatment step of pipe, take the production technology of directly cold-drawn after pickling, phosphatization, saponification.Although after this production technology of use, solid drawn tube manufacturer improves production efficiency, has saved equipment purchasing expense, has reduced production cost.But the lumber recovery of solid drawn tube but significantly declines.
The reason producing 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, the condition of delivery of middle low-carbon (LC) oil cylinder hot rolled seamless steel tube pipe is generally As rolled, and its grain size is comparatively thick, and tissue turbulence, remnant tissue's stress are comparatively large, extend on the low side, easily cause the generation of cold-drawn defect.
2, the wall thickness tolerance of middle low-carbon (LC) oil cylinder hot rolled seamless steel tube pipe is ± 12.5%, and the margin of tolerance is larger.At wall thickness tolerance compared with when extending on the low side during Datong District, easily cause the generation of cold-drawn defect.
3, the non-metallic inclusion content in GB/T8162 centering low-carbon (LC) oil cylinder hot rolled seamless steel tube pipe is without explicitly calling for.When being dispersed with a fairly large number of brittle inclusion in central low-carbon (LC) oil cylinder hot rolled seamless steel tube pipe, not only easily form defect at brittle inclusion place 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 low-carbon (LC) oil cylinder hot rolled seamless steel tube pipe in will fully meeting, hot rolled seamless steel tube pipe must meet following technical conditions: 1, extend better, and 2, wall thickness accuracy is higher, 3, brittle inclusion content in steel is less.
Summary of the invention
An object of the present invention is for above-mentioned deficiency, provides a kind of production method of hot rolled seamless steel tube pipe, to expect that low-carbon (LC) oil cylinder hot rolled seamless steel tube pipe can not meet the problem of the requirement of direct cold-drawn production technology during solving prior art obtains.
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) make steel
(1a) molten iron pre-desulfurization, controls into converter molten iron S content≤0.015%;
(1b) converter smelting, during converter tapping, carbon content is C >=0.10%, and phosphorus content is P≤0.008%, and tapping temperature is 1620 DEG C ~ 1660 DEG C, then tapping deoxidization alloying;
(1c) LF refining furnace refining, adopts the acid lab-prepared refining slag refining of low alkalinity, and the acid lab-prepared refining slag of described low alkalinity is by parts by weight 35 ~ 55 parts of SiO
2, 25 ~ 40 parts of CaO, 10 ~ 20 parts of Al
2o
3composition;
(1d) alloying operation is carried out, obtained molten steel;
(2) continuous casting
(2a) continuous casting long gate is adopted to combine to blow Ar protection and the molding casting mode of the neonychium molten steel obtained to step (1d) to carry out continuous casting;
(2b) control tundish liquid level, continuous casting production is opened and watered liquid level is 550-650mm, and cast liquid level is 750-850mm, even waters liquid level and waters lower than forbidding during 450mm connecting;
(2c) control the degree of superheat of molten steel, tundish temperature is 1520 DEG C ~ 1545 DEG C;
(2d) obtained continuous casting billet;
(3) tube rolling and burning optimization on line
Use the continuous casting billet that Continuous mill train hot-rolled step (2d) is obtained, perforation, adopt continuous rolling-tube unit rolling, heat again below hollow forging air cooling to 500 after to be rolled DEG C, be incubated sizing after coming out of the stove, sizing deformation amount controlling is 10% ~ 15%, and the wall thickness tolerance of steel pipe finished product is-10% ~+10%, and after sizing, heap is cooled to room temperature in atmosphere.
According to one embodiment of present invention, tapping deoxidization alloying adopts without Al deoxidization technique in step (1b), and adds Si-Mn alloy 2.5 ~ 3.5Kg/t and carry out deoxidation.
According to one embodiment of present invention, when LF refining furnace terminates refining tapping in step (1c), quiet to blow front temperature be 1595 DEG C ~ 1605 DEG C, the quiet time of blowing >=15min after tapping, and control Argon intensity to keep molten steel wriggling and molten steel must not be exposed.
According to one embodiment of present invention, in step (1d), the chemical composition of obtained molten steel 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.
According to one embodiment of present invention, when using Continuous mill train hot rolling continuous casting billet in step (3), annular furnace goes out the temperature of boiler tube is 1230 DEG C-1270 DEG C.
According to one embodiment of present invention, the perforation of two-roller skew-rolling cone type piercer is adopted in step (3).
According to one embodiment of present invention, in step (3), during rolling, finishing temperature is 860 DEG C-900 DEG C.
According to one embodiment of present invention, three roller sizings are adopted in step (3).
The present invention comparatively prior art compares, and 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 the acid lab-prepared refining slag of the custom-designed low alkalinity of employing in steel making working procedure, brittle inclusion in steel is converted into plastic occluded foreignsubstance, thus oil cylinder hot rolled seamless steel tube pipe is not easily pulled out in Cold Drawing Process split and after machined, steel tube surface not easily occurs that " hickie, pit " caused by brittle inclusion etc. affects the defect of product quality, therefore can improve the quality of the seamless steel tube blank that the present invention obtains.
(2) the present invention adopts Continuous mill train rolled steel tube, ensure that the wall thickness tolerance of steel pipe controls ± 10%, the oil cylinder hot rolled seamless steel tube pipe produced not easily is pulled out in Cold Drawing Process and splits.
(3) the present invention is by finishing temperature control at 860-900 degree, carrys out the grain size of refinement finished product and improve the percentage elongation of finished product by the grain size of the seamless hollow forging of refinement oil cylinder hot rolling.
(4) burning optimization on line technique of the present invention have employed the technique of hollow forging at more than AC3 10-30 degree temperature range sizing, with the conventional technics comparing at two-phase section burning optimization on line, burning optimization on line technique of the present invention not only maintains the feature of two-phase section normalizing process crystal grain thinning, and because its sizing temperature is at more than AC3, banded structure in steel pipe metallographic structure significantly improves, therefore the steel pipe after heat treatment also has the obviously higher advantage of higher, the especially laterally extending rate of lower, the extending longitudinally rate of yield strength.
(5), in burning optimization on line technique of the present invention, after sizing, have employed the type of cooling of cooling in heap; Because the cooling velocity of cooling in heap is comparatively slow, therefore, the percentage elongation of heat-treated steel pipe improves, and internal stress obviously reduces.
(6) production cost of burning optimization on line technique of the present invention and general burning optimization on line technique is suitable, but the performances such as the yield strength of heat-treated steel pipe, percentage elongation are significantly better than the latter; The production cost of burning optimization on line technique of the present invention is starkly lower than general off-line Technology for Heating Processing, and the performances such as the yield strength of heat-treated steel pipe, percentage elongation are slightly better than the latter.Therefore, it is lower that burning optimization on line technique of the present invention has production cost, the good advantage of product quality.
Detailed description of the invention
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 the step of steel-making, continuous casting and tube rolling and burning optimization on line, 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 hot rolled seamless steel tube pipe of 159*17, the chemical composition of this oil cylinder 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
First the step of pre-desulphurised hot metal is carried out in described steel-making step, then use 70T converter just to make steel water, enter converter molten iron and carry out molten iron pre-desulfurization process, control S content≤0.015% into converter molten iron, for follow-up LF stove adopts low basicity slag to create conditions, then carry out following step:
Converter smelting, control 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 DEG C ~ 1660 DEG C simultaneously.
Pre-deoxidation and preliminary alloying, control total oxygen content in steel, to reduce the field trash that deoxidation products produces, 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 add Si-Mn alloy 2.5 ~ 3.5Kg/t and carry out deoxidation, described Si-Mn alloy 2.5 ~ 3.5Kg/t represents in molten steel per ton Si-Mn the alloy adding 2.5 ~ 3.5 kilograms.
The refining of LF refining furnace, in LF refining furnace refining process, in order to strictly control the kind of inclusion content in melting steel, quantity, size and form, the present invention adopts the acid lab-prepared refining slag of low alkalinity to carry out refining.The acid lab-prepared refining slag of described low alkalinity is by parts by weight 35 ~ 55 parts of SiO
2, 25 ~ 40 parts of CaO, 10 ~ 20 parts of Al
2o
3composition.In the refining process of molten steel, do not add Al, Al in slag can be reduced
2o
3content, slag Al at the end of refining
2o
3content controls about 10%, and refining final purpose is the Al in field trash
2o
3control about 20%.Suitable raising tapping temperature, increases fluidity molten steel, keeps bottom blowing Ar unimpeded, controls to blow Ar intensity, avoids molten steel to seethe air-breathing.Strong deoxidation operation, makes foamed white slag fast, keeps white slag tapping, then adopts the prolongation molten steel quiet time of blowing to impel steel inclusion to float.
Then alloying operation is carried out, because the oil cylinder of different size is with in hot rolled seamless steel tube pipe, each chemical element component content is different, therefore by the content of each chemical element composition in alloying operation adjustable molten steel, to become the oil cylinder hot rolled seamless steel tube pipe of output different size.In the oil cylinder hot rolled seamless steel tube pipe of all different sizes, 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, then by alloying operation, each chemical composition of described molten steel is adjusted to by weight percentage: 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 terminates tapping, quietly blow front temperature controlling range and be: 1595 DEG C ~ 1605 DEG C, after refining tapping, the quiet time of blowing is 15min, and control to blow Ar intensity to keep molten steel wriggling and molten steel must not be exposed, can molten steel be obtained by the step of making steel above.
In described continuous casting step, the molding casting mode that continuous casting adopts continuous casting long gate combination to blow Ar protection and neonychium carries out continuous casting to the molten steel that steel-making step obtains, and prevents suction nitrogen and the secondary oxidation of molten steel.Being mingled with to prevent tundish slag from bringing into, strictly controlling tundish liquid level, continuous casting production is opened and watered liquid level is 550-650mm, and cast liquid level is 750-850mm, even waters liquid level and waters lower than forbidding during 450mm connecting.Control the degree of superheat of molten steel, adopt Prepared by Low Superheat Pouring, tundish temperature is 1520 ~ 1545 DEG C.Continuous casting covering slag adopts mould flux, and in casting process, casting speed control is stablized, the whole-process automatic water distribution of continuous casting secondary cooling water.Final production goes out chemical composition evenly and the steel inclusion continuous casting billet that particularly brittle inclusion content is low.
In described tube rolling and burning optimization on line step, use the continuous casting billet that Continuous mill train hot rolling continuous casting step is obtained, when using Continuous mill train hot rolling continuous casting billet, annular furnace goes out the temperature of boiler tube is 1230 DEG C-1270 DEG C.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 milling step, finishing temperature control is 860-900 DEG C.Below hollow forging air cooling to 500 after to be rolled DEG C, enter step heating-furnace and heat, then heating-up temperature is 835-865 DEG C, insulation adopts three roller sizings after coming out of the stove, and the deformation amount controlling of sizing is at 10-15%.The wall thickness tolerance control range of steel pipe finished product is :-10% ~+10%, and after sizing, heap is chilled to room temperature in atmosphere.Packaging, warehouse-in after flaw detection, inspection again.
Fished pipe obtained in the present embodiment is after metallographic, mechanics inspection, 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 that the specification of the oil cylinder hot rolled seamless steel tube pipe that the present embodiment is produced is the oil cylinder hot rolled seamless steel tube pipe of 168*15, the chemical composition of the oil cylinder hot rolled seamless steel tube pipe of this specification 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%.When carrying out alloying operation, be the content of each chemical composition in each chemical composition content adjustment molten steel in the oil cylinder hot rolled seamless steel tube pipe of 168*15 according to specification, be adjusted to by weight percentage by chemical composition each in molten steel: 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 obtains is after metallographic, mechanics inspection, 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 that the specification of the oil cylinder hot rolled seamless steel tube pipe that the present embodiment is produced is the oil cylinder hot rolled seamless steel tube pipe of 139.7*17, the chemical composition of the oil cylinder hot rolled seamless steel tube pipe of this specification 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%.When carrying out alloying operation, be the content of each chemical composition in each chemical composition content adjustment molten steel in the oil cylinder hot rolled seamless steel tube pipe of 139.7*17 according to specification, be adjusted to by weight percentage by chemical composition each in molten steel: 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 obtains is after metallographic, mechanics inspection, 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 amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. the production method of hot rolled seamless steel tube pipe, is characterized in that the method comprises the following steps:
(1) make steel
(1a) molten iron pre-desulfurization, controls into converter molten iron S content≤0.015%;
(1b) converter smelting, during converter tapping, carbon content is C >=0.10%, and phosphorus content is P≤0.008%, and tapping temperature is 1620 DEG C ~ 1660 DEG C, then tapping deoxidization; Tapping deoxidization adopts without Al deoxidization technique, and adds Si-Mn alloy 2.5 ~ 3.5Kg/t and carry out deoxidation;
(1c) LF refining furnace refining, adopts the acid lab-prepared refining slag refining of low alkalinity, and the acid lab-prepared refining slag of described low alkalinity is by parts by weight 35 ~ 55 parts of SiO
2, 25 ~ 40 parts of CaO, 10 ~ 20 parts of Al
2o
3composition;
(1d) alloying operation is carried out, obtained molten steel;
(2) continuous casting
(2a) the molding casting mode adopting continuous casting long gate combination to blow Ar protection and neonychium carries out continuous casting to molten steel;
(2b) control tundish liquid level, continuous casting production is opened and watered liquid level is 550-650mm, and cast liquid level is 750-850mm, even waters liquid level and waters lower than forbidding during 450mm connecting;
(2c) control the degree of superheat of molten steel, tundish temperature is 1520 DEG C ~ 1545 DEG C;
(2d) obtained continuous casting billet;
(3) tube rolling and burning optimization on line
Use Continuous mill train hot rolling continuous casting billet, perforation, adopt continuous rolling-tube unit rolling, heat again below hollow forging air cooling to 500 after to be rolled DEG C, be incubated sizing after coming out of the stove, sizing deformation amount controlling is 10% ~ 15%, and the wall thickness tolerance of steel pipe finished product is-10% ~+10%, and after sizing, heap is cooled to room temperature in atmosphere.
2. according to the production method of hot rolled seamless steel tube pipe according to claim 1, when it is characterized in that in step (1c), LF refining furnace terminates refining tapping, it is quiet that to blow front temperature be 1595 DEG C ~ 1605 DEG C, tapping after the quiet time of blowing >=15min, and control Argon intensity with keeps molten steel wriggling and molten steel must not be exposed.
3., according to the production method of hot rolled seamless steel tube pipe according to claim 1, it is characterized in that the chemical composition of obtained 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≤0.025%, surplus are Fe and other impurity.
4., according to the production method of hot rolled seamless steel tube pipe according to claim 1, when it is characterized in that using Continuous mill train hot rolling continuous casting billet in step (3), annular furnace goes out the temperature of boiler tube is 1230 DEG C-1270 DEG C.
5., according to the production method of hot rolled seamless steel tube pipe according to claim 1, it is characterized in that in step (3), adopting the perforation of two-roller skew-rolling cone type piercer.
6., according to the production method of hot rolled seamless steel tube pipe according to claim 1, when it is characterized in that rolling in step (3), finishing temperature is 860 DEG C-900 DEG C.
7., according to the production method of hot rolled seamless steel tube pipe according to claim 1, it is characterized in that adopting three roller sizings in step (3).
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Families Citing this family (7)
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| 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 |
| 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 |
| CN108531806B (en) * | 2018-04-17 | 2019-12-03 | 东北大学 | A kind of high-strength tenacity hot rolled seamless steel tube and preparation method thereof |
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| 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 |
| 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 (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3259975A (en) * | 1963-12-19 | 1966-07-12 | Combustion Eng | Tube manufacture |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5623306A (en) * | 1979-08-01 | 1981-03-05 | Sumitomo Metal Ind Ltd | Production of seamless steel pipe |
-
2014
- 2014-07-15 CN CN201410336058.3A patent/CN104190740B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3259975A (en) * | 1963-12-19 | 1966-07-12 | Combustion Eng | Tube manufacture |
| 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 (1)
| Title |
|---|
| 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;方剑等;《特殊钢》;20120630;第33卷(第3期);第54页、图1 * |
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