CN110014052A - A kind of manufacturing process of chemical fertilizer seamless steel pipe - Google Patents
A kind of manufacturing process of chemical fertilizer seamless steel pipe Download PDFInfo
- Publication number
- CN110014052A CN110014052A CN201910431676.9A CN201910431676A CN110014052A CN 110014052 A CN110014052 A CN 110014052A CN 201910431676 A CN201910431676 A CN 201910431676A CN 110014052 A CN110014052 A CN 110014052A
- Authority
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- Prior art keywords
- steel pipe
- embryo material
- manufacturing process
- seamless steel
- rolling
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Classifications
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- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
- C23G1/081—Iron or steel solutions containing H2SO4
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses a kind of manufacturing process of chemical fertilizer seamless steel pipe, specific step is as follows for the manufacturing process of the chemical fertilizer seamless steel pipe: pickling, cooling, immersion oil, polishing, cold rolling, Preliminary detection, finished product detection, cuts storage at annealing.Technical effect and advantage of the invention: the present invention carries out pickling, annealing, cooling, immersion oil by the blank to seamless steel pipe, is conducive to remove in the iron rust on blank, while being softened blank in order to subsequent cold rolling work, improves the quality of seamless steel pipe；It polishes before cold tube rolling the both ends of steel pipe, it is made to become smooth, also benefit and the possibility for reducing raw edges, one procedure of every rolling carries out the quality for checking steel pipe, at once to guarantee the quality of steel pipe, the generation for reducing waste material, improves the processing quality of steel pipe, reduces the possibility of leakage.
Description
Technical field
The invention belongs to seamless steel pipe fields, more specifically more particularly to a kind of manufacture work of chemical fertilizer seamless steel pipe
Skill.
Background technique
With hollow section, length is much larger than diameter or the steel of perimeter.It is divided into round, rectangular, square by cross sectional shape
Shape and chapped pipe；It is divided into structural carbon steel steel pipe, low-alloy structural steel steel pipe, steel alloy steel pipe and composite steel tube by material；
It is divided into conveyance conduit use by purposes, engineering structure is used, Thermal Equipment is used, petrochemical industry is used, machine-building use, geological drilling
With, high-tension apparatus steel pipe etc.；It is divided into seamless steel pipe and welded still pipe by production technology, wherein seamless steel pipe divides hot rolling and cold again
Two kinds are rolled and (pull out), welded still pipe divides straight seam welded steel pipe and screw seam welding steel pipe again.Steel pipe is applied not only to trandfer fluid and powder
Shape solid, exchange thermal energy, manufacture machine components and container, it or a kind of economic steel.With steel pipe manufacture building structure rack,
Pillar and machinery mount can mitigate weight, save metal 20~40%, and can realize batch production mechanized construction.Use steel
Pipe manufacture highway bridge can not only save steel, simplify construction, and can greatly reduce the area of stopping off, investment reduction and
Maintenance cost.
Made of block of metal, non-jointed steel pipe, referred to as seamless steel pipe on surface.It is seamless according to production method
Pipe divides hot-rolled pipe, cold rolled tube, drawn tube, extruded tube, push pipe etc..According to section configuration, two kinds of seamless steel pipe cyclotomy shape and abnormity,
Special pipe has rectangular, oval, triangle, hexagon, melon seeds shape, star, band finned tube Various Complex shape.Maximum gauge reaches
650mm, minimum diameter 0.3mm.It is different depending on the application, there are thick-walled pipe and thin-wall tube.Seamless steel pipe is mainly used as petroleum geology
Drill pipe, the cracking tube of petrochemical industry, boiler tube, bushed bearing and automobile, tractor, aviation high-precision configuration steel pipe.
In the prior art, when carrying out production seamless steel pipe using the method for cold rolling, the case where being easy to produce raw edges,
Seamless steel pipe is not just available once there is a situation where raw edges, so that waste material generates excessively.For this purpose, we provide a kind of chemical fertilizer
With the manufacturing process of seamless steel pipe.
Summary of the invention
The purpose of the present invention is to solve disadvantages existing in the prior art, carry out acid by the blank to seamless steel pipe
It washes, anneal, cooling down, immersion oil, being conducive to remove in the iron rust on blank, while softening in order to subsequent cold rolling blank
Work, improves the quality of seamless steel pipe；It polishes before cold tube rolling the both ends of steel pipe, it is made to become smooth, it is also sharp
With the possibility for reducing raw edges, one procedure of every rolling carries out the quality for checking steel pipe at once, to guarantee the quality of steel pipe, and mentions
A kind of manufacturing process of chemical fertilizer seamless steel pipe out.
To achieve the above object, the invention provides the following technical scheme:
A kind of manufacturing process of chemical fertilizer seamless steel pipe, the manufacturing process specific steps of the chemical fertilizer seamless steel pipe are such as
Under:
The embryo material of seamless steel pipe is put into descaling bath by S1, pickling, carries out pickling to embryo material, removal embryo material surface
Iron rust, impurity；
Embryo material after pickling is put into annealing furnace by S2, annealing, and heating temperature is arranged at 1100~1350 DEG C, to embryo
Material carries out return of goods softening, rolls convenient for subsequent to embryo material；
Embryo material after annealing is placed at dry and ventilated and cools down by S3, cooling, allows to cool to 60~80 DEG C；
S4, immersion oil, by after but after embryo material be put into antirust oil, impregnated, so that speckling with antirust inside and outside embryo material
Oil avoids becoming rusty on embryo material, is convenient for subsequent processing work；
S5, polishing need to polish to two end edge openings of pipeline, so that edge is smooth, prevent cold before cold rolling
When rolling, Rolling roller is damaged；
S6, cold rolling, by embryo material by eight rack tandem rolling tube machines, by eight racks continuously arranged and adjacent rack roll
The mutual wrong limiting mandrel tandem rolling pipe machine of roll gap carries out embryo material pipe to be extended continuously rolling；
S7, Preliminary detection need to detect the both ends edge of pipeline, check that edge is after every rolling together
It is no the case where raw edges occur, the case where if there is raw edges, stop production work immediately, prevent damage roll, influences to process matter
Amount；
S8, finished product detection, by steel pipe rolling at predetermined finished product after, need the aperture to steel pipe, wall thickness, straightness,
Surface gloss, leakproofness are detected, and guarantee the quality of steel pipe；
S9, storage is cut, the steel pipe of finished product is carried out being cut into certain length as needed, in order to subsequent use
And preservation.
Preferably, the sulfuric acid solution that the pickling solution concentration in the step S1 in descaling bath is 6~8%, solution temperature
40 DEG C ± 5 DEG C, soaking time 4-6 hours, embryo material pipe inner and outer surfaces oxide skin and graphite residue are all cleaned, acid cleaning of steel tube
After enter clear water cylinder for steel pipe rinsed clean.
Preferably, after finished product is made in the step S8, the interior and exterior of steel pipe is saponified, saponification liquor is configured to,
50 grams per liter of fatty acid >, 5 grams per liter of free acid <, 80-85 DEG C of temperature, soaking time 10 minutes, the steel tube surface after saponification had
One layer of uniform saponification film.
Preferably, it in the step S6, when being rolled to embryo material pipe, needs on surfaces externally and internally and roll to pipeline
Graphite is smeared, the frictional force between steel pipe and roll is reduced.
Preferably, in the step S4, before the embryo material pipe immersion oil after annealing, need to the inside and outside of embryo material pipe into
The work of row soot blowing, removes the dust on embryo material pipe.
Preferably, in the step S7, after there is raw edges situation, the end of steel pipe is cut off, further according to need into
After row annealing softening, continue to produce.
Preferably, in the step S4, steel pipe is hung in using airline and is impregnated into oil sump, needs to keep at steel pipe
In inclined state, convenient for the outflow of lubrication oil in steel pipe.
Preferably, it in the step S8, before storage, needs to write on the specification of steel pipe on label, label is attached to
The surface of steel pipe goes out library lookup convenient for after.
Technical effect and advantage of the invention: the present invention by blank to seamless steel pipe carry out pickling, annealing, cooling,
Immersion oil is conducive to remove in the iron rust on blank, while being softened blank in order to subsequent cold rolling work, improves seamless
The quality of steel pipe；Polish before cold tube rolling the both ends of steel pipe, it made to become smooth, also benefit with reduce raw edges can
Can, one procedure of every rolling is carried out checking that the quality of steel pipe reduces the generation of waste material to guarantee the quality of steel pipe at once, be improved
The processing quality of steel pipe, reduces the possibility of leakage.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, to this
Invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, not
For limiting the present invention.Based on the embodiments of the present invention, those of ordinary skill in the art are not before making creative work
Every other embodiment obtained is put, shall fall within the protection scope of the present invention.
Embodiment 1
A kind of manufacturing process of chemical fertilizer seamless steel pipe, the manufacturing process specific steps of the chemical fertilizer seamless steel pipe are such as
Under:
The embryo material of seamless steel pipe is put into descaling bath by S1, pickling, carries out pickling to embryo material, removal embryo material surface
Iron rust, impurity；
Embryo material after pickling is put into annealing furnace by S2, annealing, and heating temperature is arranged at 1100~1350 DEG C, to embryo
Material carries out return of goods softening, rolls convenient for subsequent to embryo material, can need 100 DEG C of progress or more according to the process of actual processing
Temperature adjustment；
Embryo material after annealing is placed at dry and ventilated and cools down by S3, cooling, allows to cool to 60~80 DEG C, can
To use fan to cool down it, cooling rate is improved；
S4, immersion oil, by after but after embryo material be put into antirust oil, impregnated, so that speckling with antirust inside and outside embryo material
Oil avoids becoming rusty on embryo material, is convenient for subsequent processing work；
S5, polishing need to polish to two end edge openings of pipeline, so that edge is smooth, prevent cold before cold rolling
When rolling, Rolling roller is damaged；
S6, cold rolling, by embryo material by eight rack tandem rolling tube machines, by eight racks continuously arranged and adjacent rack roll
The mutual wrong limiting mandrel tandem rolling pipe machine of roll gap carries out embryo material pipe to be extended continuously rolling；
S7, Preliminary detection need to detect the both ends edge of pipeline, check that edge is after every rolling together
It is no the case where raw edges occur, the case where if there is raw edges, stop production work immediately, prevent damage roll, influences to process matter
Amount；
S8, finished product detection, by steel pipe rolling at predetermined finished product after, need the aperture to steel pipe, wall thickness, straightness,
Surface gloss, leakproofness are detected, and guarantee the quality of steel pipe；
S9, storage is cut, the steel pipe of finished product is carried out being cut into certain length as needed, in order to subsequent use
And preservation.
Preferably, the sulfuric acid solution that the pickling solution concentration in the step S1 in descaling bath is 6~8%, solution temperature
40 DEG C ± 5 DEG C, soaking time 4-6 hours, embryo material pipe inner and outer surfaces oxide skin and graphite residue are all cleaned, acid cleaning of steel tube
After enter clear water cylinder for steel pipe rinsed clean.
Preferably, being saponified the interior and exterior of steel pipe after finished product is made in the step S8, saponification liquor is configured to,
50 grams per liter of fatty acid >, 5 grams per liter of free acid <, 80-85 DEG C of temperature, soaking time 10 minutes, the steel tube surface after saponification had
One layer of uniform saponification film, so that steel pipe is not easy upper rust.
Preferably, when being rolled to embryo material pipe, being needed on surfaces externally and internally and roll to pipeline in the step S6
Graphite is smeared, the frictional force between steel pipe and roll is reduced.
Through the above technical solution: being conducive to improve the service life of roll, while improving the surface gloss of steel pipe.
Preferably, in the step S4, before the embryo material pipe immersion oil after annealing, need to the inside and outside of embryo material pipe into
The work of row soot blowing, removes the dust on embryo material pipe.
Through the above technical solution: preventing dust residue in steel pipe, cause the pollution of oil sump.
Preferably, in the step S7, after there is raw edges situation, the end of steel pipe is cut off, further according to need into
After row annealing softening, continue to produce.
Through the above technical solution: advantageously reducing the possibility of waste product generation, reduce processing cost.
Preferably, hanging in using airline by steel pipe and impregnating into oil sump in the step S4, need to keep at steel pipe
In inclined state, convenient for the outflow of lubrication oil in steel pipe.
Through the above technical solution: wirerope can be used, doubling is carried out in the eccentric part for being located at wirerope, so that steel wire
Two edge lengths of restricting are different, hook all installed at the both ends of wirerope, for slinging steel pipe.
Preferably, before storage, needing to write on the specification of steel pipe on label, label being attached in the step S8
The surface of steel pipe goes out library lookup convenient for after.
Through the above technical solution: in order to which stock clerk carries out lookup steel pipe.
In summary: pickling, annealing, cooling, immersion oil being carried out to the blank of seamless steel pipe, are conducive to the iron rust on blank
It removes, while blank is softened in order to subsequent cold rolling work, improve the quality of seamless steel pipe；Before cold tube rolling
Polish the both ends of steel pipe, it made to become smooth, also benefit with reduce raw edges possibility, one procedure of every rolling, at once into
Row checks that the quality of steel pipe reduces the generation of waste material to guarantee the quality of steel pipe, improves the processing quality of steel pipe, reduction is let out
The possibility of dew.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features,
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (8)
1. a kind of manufacturing process of chemical fertilizer seamless steel pipe, it is characterised in that: the manufacturing process of the chemical fertilizer seamless steel pipe has
Steps are as follows for body:
The embryo material of seamless steel pipe is put into descaling bath by S1, pickling, to embryo material carry out pickling, remove embryo material surface iron rust,
Impurity；
Embryo material after pickling is put into annealing furnace by S2, annealing, heating temperature be arranged at 1100~1350 DEG C, to embryo material into
Row, which is returned goods, to be softened, and is rolled convenient for subsequent to embryo material；
Embryo material after annealing is placed at dry and ventilated and cools down by S3, cooling, allows to cool to 60~80 DEG C；
S4, immersion oil, by after but after embryo material be put into antirust oil, impregnated, so that speckling with antirust oil inside and outside embryo material, kept away
Exempt to become rusty on embryo material, is convenient for subsequent processing work；
S5, polishing need to polish to two end edge openings of pipeline, so that edge is smooth, prevent in cold rolling before cold rolling
When, damage Rolling roller；
S6, cold rolling pass through the roll gap of eight racks and adjacent rack roll continuously arranged by embryo material by eight rack tandem rolling tube machines
Mutually wrong limiting mandrel tandem rolling pipe machine carries out embryo material pipe to be extended continuously rolling；
S7, Preliminary detection need to detect the both ends edge of pipeline, check whether edge goes out after every rolling together
The case where existing raw edges, the case where if there is raw edges, stops production work immediately, prevents damage roll, influence processing quality；
S8, finished product detection, by steel pipe rolling at predetermined finished product after, need the aperture to steel pipe, wall thickness, straightness, surface
Glossiness, leakproofness are detected, and guarantee the quality of steel pipe；
S9, storage is cut, the steel pipe of finished product is carried out being cut into certain length as needed, in order to subsequent use and guarantor
It deposits.
2. a kind of manufacturing process of chemical fertilizer seamless steel pipe according to claim 1, it is characterised in that: in the step S1
The sulfuric acid solution that pickling solution concentration in descaling bath is 6~8%, 40 DEG C ± 5 DEG C of solution temperature, soaking time 4-6 hours, will
Embryo material pipe inner and outer surfaces oxide skin and graphite residue are all cleaned, and clear water cylinder is entered after acid cleaning of steel tube by steel pipe rinsed clean.
3. a kind of manufacturing process of chemical fertilizer seamless steel pipe according to claim 1, it is characterised in that: in the step S8
After finished product is made, the interior and exterior of steel pipe is saponified, saponification liquor is configured to, 50 grams per liter of fatty acid >, 5 grams of free acid </
It rises, 80-85 DEG C of temperature, soaking time 10 minutes, the steel tube surface after saponification has one layer of uniform saponification film.
4. a kind of manufacturing process of chemical fertilizer seamless steel pipe according to claim 1, it is characterised in that: the step S6
In, when rolling to embryo material pipe, need to smear graphite on surfaces externally and internally and roll to pipeline, reduce steel pipe and roll it
Between frictional force.
5. a kind of manufacturing process of chemical fertilizer seamless steel pipe according to claim 1, it is characterised in that: the step S4
In, before the embryo material pipe immersion oil after annealing, needs to carry out soot blowing work to the inside and outside of embryo material pipe, remove on embryo material pipe
Dust.
6. a kind of manufacturing process of chemical fertilizer seamless steel pipe according to claim 1, it is characterised in that: the step S7
In, after there is raw edges situation, the end of steel pipe is cut off, after needing to carry out annealing softening, continues to produce.
7. a kind of manufacturing process of chemical fertilizer seamless steel pipe according to claim 1, it is characterised in that: the step S4
In, steel pipe is hung in using airline and is impregnated into oil sump, needs that steel pipe is kept to be in inclined state, convenient in steel pipe
Outflow of lubrication oil.
8. a kind of manufacturing process of chemical fertilizer seamless steel pipe according to claim 1, it is characterised in that: the step S8
In, before storage, needs to write on the specification of steel pipe on label, label is attached to the surface of steel pipe, looked into convenient for outbound later
It looks for.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910431676.9A CN110014052A (en) | 2019-05-23 | 2019-05-23 | A kind of manufacturing process of chemical fertilizer seamless steel pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910431676.9A CN110014052A (en) | 2019-05-23 | 2019-05-23 | A kind of manufacturing process of chemical fertilizer seamless steel pipe |
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| Publication Number | Publication Date |
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| CN110014052A true CN110014052A (en) | 2019-07-16 |
Family
ID=67194342
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