CN105710610A - Seamless steel pipe machining technology - Google Patents
Seamless steel pipe machining technology Download PDFInfo
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- CN105710610A CN105710610A CN201610193846.0A CN201610193846A CN105710610A CN 105710610 A CN105710610 A CN 105710610A CN 201610193846 A CN201610193846 A CN 201610193846A CN 105710610 A CN105710610 A CN 105710610A
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- Prior art keywords
- blank
- steel pipe
- pickling
- seamless steel
- carried out
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/02—Rigid pipes of metal
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a seamless steel pipe machining method. The method comprises the steps of firstly, workblank forming, wherein discharging parameters are determined according to the needed specification, and a workblank is formed after discharging is carried out through a belt saw; secondly, acid pickling, workblank acid pickling is carried out in an acid pickling bath, and according to the specific steps, the workblank is placed in an pickling solution to be subject to bath dipping for 18 min to 25 min, washing is carried out, then, the workblank is subject to bath dipping in a phosphating solution for 10 min to 25 min, the temperature is controlled to range from 60 DEG C to 68 DEG C, and washing is carried out; thirdly, cold drawing and stretching, wherein the treated workblank is stretched at the normal temperature to meet the design requirement; fourthly, heat treatment is carried out, wherein cold drawing and heat treatment are repeatedly carried out for 2 times to 3 times; fifthly, straightening performing; and sixthly, packaging performing after straightening is carried out.
Description
Technical field
The invention belongs to metal processing sectors, particularly to a kind of seamless steel pipe processing technique.
Background technology
Seamless steel pipe has hollow section, and a large amount of pipelines being used as conveyance fluid, such as transfer oil, natural gas, coal gas and water and the pipeline etc. of some solid material.Steel pipe is compared with the solid steel such as round steel, when bending resistance torsional strength is identical, lighter in weight, it is a kind of economic section steel products, is widely used in manufacture structural member and machine components, as the steel scaffold etc. in oil drill rocker, truck drive shaft, bicycle rack and construction manufactures ring-shaped work pieces with steel pipe, stock utilization can be improved, simplifying manufacturing process, save material and machining period, the most extensive steel pipe manufactures.
Steel mechanics performance is to ensure that the important indicator of steel final utilization performance (mechanical performance), and it depends on chemical composition and the heat treating regime of steel.In Steel tube standard, according to different use requirements, it is stipulated that tensile property (tensile strength, yield strength or yield point, percentage elongation) and hardness, toughness index, the high and low temperature performance etc. that also user requires.
Cold-drawn (or cold rolling) precision seamless steel tubes have inside and outside wall non-oxidation layer, bear high-pressure non-leakage, in high precision, best bright finish, clod wash be indeformable, enlarging is flattened free from flaw, surface and made the features such as antirust treatment, it is mainly used in the pneumatically or hydraulically element of frame for movement, hydraulic test and automobile and motorcycle, such as cylinder or oil cylinder etc..For meeting user's high accuracy, the requirement of high surface finish, the small-sized seamless steel tube production producer of numerous domestic is many produces the delivery of cold rolled tube state in cold rolling mode.
It is desirable to provide a kind of seamless steel pipe processing technique, its mechanical strength is big, and technique is simple, it is not necessary to soap, and heat treatment required time is short, energy-conserving and environment-protective.
Summary of the invention
The present invention is directed to the defect that prior art exists, it is therefore intended that provide a kind of seamless steel pipe processing technique, its mechanical strength is big, and technique is simple, it is not necessary to soap, and heat treatment required time is short, energy-conserving and environment-protective.
The purpose of the present invention can be achieved through the following technical solutions:
The processing technique of a kind of seamless steel pipe, it is characterised in that step is as follows:
(1) blank molding: determine blanking parameter according to required specification, is blank after band saw blanking；
(2) pickling: blank pickling is to carry out in pickling tube, particularly as follows: be placed on dipping bath 18-25min in pickle, washing, then dipping bath 10-25 min in Phosphating Solution, temperature controlled 60 DEG C～68 DEG C, washing；
The composition of described pickle according to percentage by weight is: sulphuric acid 4-5%, potassium permanganate 0.8%；
(3) cold-drawn stretching: the blank after processing, dress is stretched to meet design requirement at normal temperatures；
(4) heat treatment: in blank loading annealing furnace cold-drawn stretched, open vacuum pump, pressure is down to during-0.02MPa left and right close vacuum pump, is filled with nitrogen, and pressurize in stove is warming up at a temperature of 720-780 DEG C, is incubated 5-12min, then cools down with 150 DEG C/h speed；
Above-mentioned cold-drawn and heat treatment are repeated 2-3 time；
(5) aligning；
(6) pack after aligning.
The invention have benefit that:
The seamless steel pipe mechanical strength that the present invention prepares is big, and technique is simple, it is not necessary to soap, and heat treatment required time is short, energy-conserving and environment-protective.
Detailed description of the invention
Embodiment
1
:
The processing technique of a kind of seamless steel pipe, it is characterised in that step is as follows:
(1) blank molding: determine blanking parameter according to required specification, with S03 rustless steel as raw material, is blank after band saw blanking；
(2) pickling: blank pickling is to carry out in pickling tube, particularly as follows: be placed on dipping bath 18min in pickle, washing, then dipping bath 25 min in Phosphating Solution, temperature controlled 60 DEG C, washing；
The composition of described pickle according to percentage by weight is: sulphuric acid 5%, potassium permanganate 0.8%；
(3) cold-drawn stretching: the blank after processing, dress is stretched to meet design requirement at normal temperatures；
(4) heat treatment: in blank loading annealing furnace cold-drawn stretched, open vacuum pump, pressure is down to during-0.02MPa left and right close vacuum pump, is filled with nitrogen, and pressurize in stove is warming up at a temperature of 720 DEG C, is incubated 12min, then cools down with 150 DEG C/h speed；
Above-mentioned cold-drawn and heat treatment are repeated 2 times；
(5) aligning；
(6) pack after aligning.
Result:
The THICKNESS CONTROL of stainless steel tube is at 3mm, and tensile strength is 1500MPa, and yield strength is 950Mpa, and elongation percentage is 25%.
Embodiment
2
:
The processing technique of a kind of seamless steel pipe, it is characterised in that step is as follows:
(1) blank molding: determine blanking parameter according to required specification, with S03 rustless steel as raw material, is blank after band saw blanking；
(2) pickling: blank pickling is to carry out in pickling tube, particularly as follows: be placed on dipping bath 25min in pickle, washing, then dipping bath 10 min in Phosphating Solution, temperature controlled 68 DEG C, washing；
The composition of described pickle according to percentage by weight is: sulphuric acid 4%, potassium permanganate 0.8%；
(3) cold-drawn stretching: the blank after processing, dress is stretched to meet design requirement at normal temperatures；
(4) heat treatment: in blank loading annealing furnace cold-drawn stretched, open vacuum pump, pressure is down to during-0.02MPa left and right close vacuum pump, is filled with nitrogen, and pressurize in stove is warming up at a temperature of 780 DEG C, is incubated 5min, then cools down with 150 DEG C/h speed；
Above-mentioned cold-drawn and heat treatment are repeated 3 times；
(5) aligning；
(6) pack after aligning.
Result:
The THICKNESS CONTROL of stainless steel tube is at 3mm, and tensile strength is 1000MPa, and yield strength is 1200Mpa, and elongation percentage is 18%.
Embodiment
3
:
The processing technique of a kind of seamless steel pipe, it is characterised in that step is as follows:
(1) blank molding: determine blanking parameter according to required specification, with S03 rustless steel as raw material, is blank after band saw blanking；
(2) pickling: blank pickling is to carry out in pickling tube, particularly as follows: be placed on dipping bath 19min in pickle, washing, then dipping bath 15 min in Phosphating Solution, temperature controlled 61 DEG C, washing；
The composition of described pickle according to percentage by weight is: sulphuric acid 5%, potassium permanganate 0.8%；
(3) cold-drawn stretching: the blank after processing, dress is stretched to meet design requirement at normal temperatures；
(4) heat treatment: in blank loading annealing furnace cold-drawn stretched, open vacuum pump, pressure is down to during-0.02MPa left and right close vacuum pump, is filled with nitrogen, and pressurize in stove is warming up at a temperature of 730 DEG C, is incubated 11min, then cools down with 150 DEG C/h speed；
Above-mentioned cold-drawn and heat treatment are repeated 2 times；
(5) aligning；
(6) pack after aligning.
Result:
The THICKNESS CONTROL of stainless steel tube is at 3mm, and tensile strength is 1400MPa, and yield strength is 1000Mpa, and elongation percentage is 23%.
Embodiment
4
:
The processing technique of a kind of seamless steel pipe, it is characterised in that step is as follows:
(1) blank molding: determine blanking parameter according to required specification, with S03 rustless steel as raw material, is blank after band saw blanking；
(2) pickling: blank pickling is to carry out in pickling tube, particularly as follows: be placed on dipping bath 24min in pickle, washing, then dipping bath 23 min in Phosphating Solution, temperature controlled 67 DEG C, washing；
The composition of described pickle according to percentage by weight is: sulphuric acid 4%, potassium permanganate 0.8%；
(3) cold-drawn stretching: the blank after processing, dress is stretched to meet design requirement at normal temperatures；
(4) heat treatment: in blank loading annealing furnace cold-drawn stretched, open vacuum pump, pressure is down to during-0.02MPa left and right close vacuum pump, is filled with nitrogen, and pressurize in stove is warming up at a temperature of 760 DEG C, is incubated 8min, then cools down with 150 DEG C/h speed；
Above-mentioned cold-drawn and heat treatment are repeated 3 times；
(5) aligning；
(6) pack after aligning.
Result:
The THICKNESS CONTROL of stainless steel tube is at 3mm, and tensile strength is 1100MPa, and yield strength is 980Mpa, and elongation percentage is 19%.
Embodiment
5
:
The processing technique of a kind of seamless steel pipe, it is characterised in that step is as follows:
(1) blank molding: determine blanking parameter according to required specification, with S03 rustless steel as raw material, is blank after band saw blanking；
(2) pickling: blank pickling is to carry out in pickling tube, particularly as follows: be placed on dipping bath 21min in pickle, washing, then dipping bath 17 min in Phosphating Solution, temperature controlled 63 DEG C, washing；
The composition of described pickle according to percentage by weight is: sulphuric acid 5%, potassium permanganate 0.8%；
(3) cold-drawn stretching: the blank after processing, dress is stretched to meet design requirement at normal temperatures；
(4) heat treatment: in blank loading annealing furnace cold-drawn stretched, open vacuum pump, pressure is down to during-0.02MPa left and right close vacuum pump, is filled with nitrogen, and pressurize in stove is warming up at a temperature of 740 DEG C, is incubated 6min, then cools down with 150 DEG C/h speed；
Above-mentioned cold-drawn and heat treatment are repeated 2 times；
(5) aligning；
(6) pack after aligning.
Result:
The THICKNESS CONTROL of stainless steel tube is at 3mm, and tensile strength is 1300MPa, and yield strength is 1155Mpa, and elongation percentage is 20%.
Visible, the seamless steel pipe mechanical strength that the present invention prepares is big, and technique is simple, it is not necessary to soap, and heat treatment required time is short, energy-conserving and environment-protective.
The above; it is only the present invention preferably detailed description of the invention; but protection scope of the present invention is not limited thereto; any those familiar with the art is in the technical scope that the invention discloses; according to technical scheme and inventive concept equivalent or change in addition thereof, all should contain within protection scope of the present invention.
Claims (2)
1. the processing method of a seamless steel pipe, it is characterised in that step is as follows:
(1) blank molding: determine blanking parameter according to required specification, is blank after band saw blanking；
(2) pickling: blank pickling is to carry out in pickling tube, particularly as follows: be placed on dipping bath 18-25min in pickle, washing, then dipping bath 10-25 min in Phosphating Solution, temperature controlled 60 DEG C～68 DEG C, washing；
The composition of described pickle according to percentage by weight is: sulphuric acid 4-5%, potassium permanganate 0.8%；
(3) cold-drawn stretching: the blank after processing, dress is stretched to meet design requirement at normal temperatures；
(4) heat treatment: in blank loading annealing furnace cold-drawn stretched, open vacuum pump, pressure is down to during-0.02MPa left and right close vacuum pump, is filled with nitrogen, and pressurize in stove is warming up at a temperature of 720-780 DEG C, is incubated 5-12min, then cools down with 150 DEG C/h speed；
Above-mentioned cold-drawn and heat treatment are repeated 2-3 time；
(5) aligning；
(6) pack after aligning.
2. the processing method of the seamless steel pipe described in claim 1 processes the seamless steel pipe obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610193846.0A CN105710610A (en) | 2016-03-31 | 2016-03-31 | Seamless steel pipe machining technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610193846.0A CN105710610A (en) | 2016-03-31 | 2016-03-31 | Seamless steel pipe machining technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105710610A true CN105710610A (en) | 2016-06-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610193846.0A Pending CN105710610A (en) | 2016-03-31 | 2016-03-31 | Seamless steel pipe machining technology |
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| Country | Link |
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| CN (1) | CN105710610A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107214480A (en) * | 2017-07-20 | 2017-09-29 | 繁昌县华特机械制造有限公司 | A kind of manufacture method of large-caliber stainless steel seamless pipe |
| CN107350742A (en) * | 2017-07-20 | 2017-11-17 | 江苏省常熟环通实业有限公司 | A kind of processing technology of automobile using sound insulation square tube |
| CN107350743A (en) * | 2017-07-20 | 2017-11-17 | 江苏省常熟环通实业有限公司 | A kind of anticorrosion gymnasium welded tube processing technology |
| CN107377664A (en) * | 2017-07-26 | 2017-11-24 | 繁昌县华特机械制造有限公司 | A kind of processing technology of pipe with small pipe diameter thin-wall steel tube |
| CN107378398A (en) * | 2017-07-20 | 2017-11-24 | 江苏省常熟环通实业有限公司 | A kind of welded still pipe processing technology with sound insulation function |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0389078A2 (en) * | 1989-03-23 | 1990-09-26 | MANNESMANN Aktiengesellschaft | Method of making pressurised-gas bottles |
| US20040074570A1 (en) * | 2000-09-01 | 2004-04-22 | Trw Inc. | Method of producing a cold temperature high toughness structural steel tubing |
| CN101538684A (en) * | 2008-09-23 | 2009-09-23 | 山西太钢不锈钢股份有限公司 | Stainless steel tube for brake system of rail vehicle and method for producing same |
| CN102294379A (en) * | 2011-06-28 | 2011-12-28 | 攀钢集团成都钢钒有限公司 | Method for manufacturing seamless steel pipe for high-pressure gas cylinder with large caliber |
| CN103624102A (en) * | 2013-12-04 | 2014-03-12 | 海盐三鑫钢管有限公司 | Method for processing cold-drawing oil cylinder pipe |
| CN104073739A (en) * | 2014-07-25 | 2014-10-01 | 太原钢铁(集团)有限公司 | Heatproof stainless steel seamless steel pipe and manufacture method of stainless steel and seamless steel pipe |
| CN104174688A (en) * | 2014-07-21 | 2014-12-03 | 苏州贝思特金属制品有限公司 | Production process of seamless stainless steel tube |
-
2016
- 2016-03-31 CN CN201610193846.0A patent/CN105710610A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0389078A2 (en) * | 1989-03-23 | 1990-09-26 | MANNESMANN Aktiengesellschaft | Method of making pressurised-gas bottles |
| US20040074570A1 (en) * | 2000-09-01 | 2004-04-22 | Trw Inc. | Method of producing a cold temperature high toughness structural steel tubing |
| CN101538684A (en) * | 2008-09-23 | 2009-09-23 | 山西太钢不锈钢股份有限公司 | Stainless steel tube for brake system of rail vehicle and method for producing same |
| CN102294379A (en) * | 2011-06-28 | 2011-12-28 | 攀钢集团成都钢钒有限公司 | Method for manufacturing seamless steel pipe for high-pressure gas cylinder with large caliber |
| CN103624102A (en) * | 2013-12-04 | 2014-03-12 | 海盐三鑫钢管有限公司 | Method for processing cold-drawing oil cylinder pipe |
| CN104174688A (en) * | 2014-07-21 | 2014-12-03 | 苏州贝思特金属制品有限公司 | Production process of seamless stainless steel tube |
| CN104073739A (en) * | 2014-07-25 | 2014-10-01 | 太原钢铁(集团)有限公司 | Heatproof stainless steel seamless steel pipe and manufacture method of stainless steel and seamless steel pipe |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107214480A (en) * | 2017-07-20 | 2017-09-29 | 繁昌县华特机械制造有限公司 | A kind of manufacture method of large-caliber stainless steel seamless pipe |
| CN107350742A (en) * | 2017-07-20 | 2017-11-17 | 江苏省常熟环通实业有限公司 | A kind of processing technology of automobile using sound insulation square tube |
| CN107350743A (en) * | 2017-07-20 | 2017-11-17 | 江苏省常熟环通实业有限公司 | A kind of anticorrosion gymnasium welded tube processing technology |
| CN107378398A (en) * | 2017-07-20 | 2017-11-24 | 江苏省常熟环通实业有限公司 | A kind of welded still pipe processing technology with sound insulation function |
| CN107377664A (en) * | 2017-07-26 | 2017-11-24 | 繁昌县华特机械制造有限公司 | A kind of processing technology of pipe with small pipe diameter thin-wall steel tube |
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Application publication date: 20160629 |
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