CN107138533A - A kind of high steel pipe processing method of lumber recovery - Google Patents
A kind of high steel pipe processing method of lumber recovery Download PDFInfo
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- CN107138533A CN107138533A CN201710571328.2A CN201710571328A CN107138533A CN 107138533 A CN107138533 A CN 107138533A CN 201710571328 A CN201710571328 A CN 201710571328A CN 107138533 A CN107138533 A CN 107138533A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 41
- 239000010959 steel Substances 0.000 title claims abstract description 41
- 238000011084 recovery Methods 0.000 title claims abstract description 16
- 238000003672 processing method Methods 0.000 title claims abstract description 11
- 238000005096 rolling process Methods 0.000 claims abstract description 35
- 238000005554 pickling Methods 0.000 claims abstract description 31
- 238000000137 annealing Methods 0.000 claims abstract description 29
- 238000007127 saponification reaction Methods 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000003754 machining Methods 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 238000009749 continuous casting Methods 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims abstract description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 22
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 18
- 235000021110 pickles Nutrition 0.000 claims description 11
- 239000011780 sodium chloride Substances 0.000 claims description 11
- 238000006386 neutralization reaction Methods 0.000 claims description 10
- 239000002253 acid Substances 0.000 claims description 9
- 238000005266 casting Methods 0.000 claims description 5
- 230000008676 import Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims 1
- 239000007788 liquid Substances 0.000 claims 1
- 239000011701 zinc Substances 0.000 claims 1
- 229910052725 zinc Inorganic materials 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 230000007547 defect Effects 0.000 abstract description 5
- 238000005336 cracking Methods 0.000 abstract description 3
- 238000009413 insulation Methods 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 abstract description 2
- 238000004080 punching Methods 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- OXHXATNDTXVKAU-UHFFFAOYSA-N phosphoric acid zinc Chemical compound [Zn].OP(O)(O)=O OXHXATNDTXVKAU-UHFFFAOYSA-N 0.000 description 4
- 238000010792 warming Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 238000001953 recrystallisation Methods 0.000 description 3
- 239000000344 soap Substances 0.000 description 3
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 description 3
- 229910000165 zinc phosphate Inorganic materials 0.000 description 3
- NGNBDVOYPDDBFK-UHFFFAOYSA-N 2-[2,4-di(pentan-2-yl)phenoxy]acetyl chloride Chemical class CCCC(C)C1=CC=C(OCC(Cl)=O)C(C(C)CCC)=C1 NGNBDVOYPDDBFK-UHFFFAOYSA-N 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 230000002421 anti-septic effect Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000000930 thermomechanical effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
- B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
- B21B19/04—Rolling basic material of solid, i.e. non-hollow, structure; Piercing, e.g. rotary piercing mills
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
- C21D8/105—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies of ferrous alloys
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The present invention relates to the preparation field of steel pipe, a kind of high steel pipe processing method of lumber recovery is disclosed, using continuous casting steel billet as raw material, is followed the steps below successively：Heating, perforation, surface machining, annealing, pickling, phosphatization, saponification, rolling preheating, rolling, cooling, obtained steel pipe do not ftracture, and quality is high, and lumber recovery is high, and production cost is low；Piercing temperature is related to the degree of cracking of punching rate and steel pipe, suitable piercing temperature can ensure piercing efficiency, steel pipe is avoided to ftracture, also it is avoided that the generation of waste product, annealing process of the invention, the defect that steel pipe internal-surface or outer surface can be overcome easily to ftracture, due to first steel pipe pipe is put into stove in 750 760 DEG C of insulations, ensure that steel pipe is consistent with in-furnace temperature, then carry out interim annealing and cooling, make pipe performance stable.
Description
Technical field
The present invention relates to the preparation field of steel pipe, more particularly to a kind of high steel pipe processing method of lumber recovery.
Background technology
At present, existing manufacture of steel pipe mainly have perforation pipe rolling and profiling thereof welding.The first
Traditional manufacture method is to cut off billet scaling, and two rollers are sent into after being reheated or three-roll piercer wears into hollow forging, then will
Pipe carries out hot rolling and cold rolling obtains finished product tubing.This method is generally to use at present, but it is more to there is process, high energy consumption,
Overlength tube can not be produced, the deficiency such as tubing manufacturing cost height.It is only 80% by the lumber recovery after solid billet to first of hot rolling
Left and right.And second of profiling thereof welding, it is that steel billet through multiple working procedure is rolled into strip, carries out bright annealing, longitudinal shearing slitting
Processing, then carries out shaping welding on welded pipe units, and welds general using welding sides such as high frequency, direct current, argon arc, square waves
Method.This method can produce ultra-long tube, especially with the obvious advantage in the production of small-diameter, thin-walled tubing and ultra-large caliber pipe material, but
It is that lumber recovery is not also high.
The content of the invention
It is high the invention provides the lumber recovery that a kind of lumber recovery is higher, product pipe workpiece quality is good based on above technical problem
Steel pipe processing method.
The technical solution adopted by the present invention is as follows：
A kind of high steel pipe processing method of lumber recovery, comprises the following steps：
Heating：Using continuous casting steel pipe as raw material, pipe is heated uniformly to 1300~1400 DEG C, the heat time is 3~4 small
When；
Perforation：The centering on heat pipe base, then enters eleven punch 11, and piercing temperature is 1000-1200 DEG C；
Machining：Pipe surface machining after perforation, so as to remove the casting flaw on pipe surface；
Annealing：
Anneal for the first time：Pipe after machining is put into annealing furnace, and temperature rises to 750-760 DEG C, is incubated 1-1.3h；
Second of annealing：In-furnace temperature is risen to 800-820 DEG C, 3-3.5h is incubated；
Third time is annealed：In-furnace temperature is down to 740-770 DEG C, 1-1.8h is incubated；
4th annealing：In-furnace temperature is down to 680-700 DEG C, 1-2h is incubated；
Pipe after annealing sequentially passes through pickling, phosphatization, saponification process；
Rolling preheating：Pipe after saponification process is pre-heated to 500 DEG C~600 DEG C；
Rolling：It is, by pre-warmed pipe, to import deformation rolling equipment in billet production step, and pipe is pre- at its
Heating-up temperature and its deformation heat produced in the deformation operation of rolling, both are superimposed and are warming up to 900 DEG C~1200 DEG C
Under the conditions of rolling temperature, so that deformation speed is rolled and is shaped；
Cooling：Environment temperature is cooled to appropriate cooling velocity.
It is preferred that, pickling temperature is 40-45 DEG C in the acid pickling step, and pickling time is 40-55min, the pipe after pickling
Base rolls in neutralization pond, and rolling number of times is 3~4 times, and neutralizer pH value is 9~10, and the pipe after neutralization rolls through clear water reserviors,
The number of times that rolls is 3~4 times.
It is preferred that, during pickle is the mixed liquor of dilute sulfuric acid and sodium chloride solution, the pickle in the acid pickling step
The whole molar concentration of dilute sulfuric acid is 25-30%, the final concentration of 5-8% of sodium chloride solution.
It is preferred that, phosphoric acid zinc concentration is 10~20% in the phosphorating treatment, and phosphating solution temperature is 62~68 DEG C, during phosphatization
Between be 10~15 minutes, phosphating solution free acidity be 5~7, General Acidity in Phosphating Solution be 50~60.
It is preferred that, saponification temperature is 60~85 DEG C in the saponification process, and saponification time is 6~9 minutes, saponification liquor pH value
For 8~9.
In summary, by adopting the above-described technical solution, the beneficial effects of the invention are as follows：
1st, preheated, rolled using heating, perforation, surface machining, annealing, pickling, phosphatization, saponification, lubrication, rolling,
Cooling process prepares steel pipe, and obtained steel pipe does not ftracture, and quality is high, and obtained tube quality is good, and lumber recovery is high, reduces life
Produce cost；
2nd, piercing temperature is related to the degree of cracking of punching rate and steel pipe, and suitable piercing temperature can ensure perforation effect
Rate, it is to avoid steel pipe ftractures, moreover it is possible to avoid the generation of waste product
3rd, annealing process of the invention, the defect that steel pipe internal-surface or outer surface can be overcome easily to ftracture, this is probably
Due to first steel pipe pipe is put into stove in 750-760 DEG C of insulation, it is ensured that steel pipe is consistent with in-furnace temperature, then carries out the stage
Property annealing and cool, make pipe performance stable.
4th, natural cooling can cause steel pipe to ftracture after coming out of the stove, and suitable quickly cooling is but substantially a kind of thermomechanical treatment, its purpose master
Be crystal grain thinning, make the present invention manufactured goods tubing, in follow-up deep-processing process so subsequent product working condition
Under be chronically at excellent mechanical property state.
5th, suitable pickling temperature can improve pickling effect, and pickling time is long to cause steel pipe overpickling, overpickling
The thick hot-tempered, color in pipe surface it is dark, have circular pin hole when serious, easy roll banding or broken when cold rolling；Can not if pickling is insufficient
The rust on fully erased pipe surface, oxide skin, obtained steel pipe finished product resistance to corrosion are poor.
6th, the dilute sulfuric acid and sodium chloride solution that the present invention is used are mixed as pickle, and pickling effect is good, and combine this
The described phosphorating treatment of invention, made steel pipe is in cold-rolled process, and cracking rate is substantially reduced, and anticorrosive property is more preferable.
7th, play and handled at good anticorrosion ability, 55-65 DEG C in steel tube surface formation phosphating coat after phosphorating treatment
15-25min can form 7-10g/m2 phosphating coat, existing good antiseptic effect, can save again high temperature consumption energy and
Phosphating solution.
8th, the present invention is this can effectively reduce energy consumption to the pre-warmed technical measures of pipe, reduce manufacturing cost, and
The deformation rolling temperature of pipe can be made again, risen on recrystallization temperature, the plasticity of as cast condition pipe is improved, and had
Enough degrees of superheat, and the lengthening coefficient of pipe deformation is improved, extend pipe deformed region scope and dynamic recrystallization
Process, makes steel pipe that there is enough conditions to realize perfect recrystallization, so as to reach the matter for improving rolling efficiency and manufactured goods steel pipe
Amount.
Embodiment
All features disclosed in this specification, can be with any in addition to mutually exclusive feature and/or step
Mode is combined.
Below, come to be described in further details the present invention in conjunction with specific embodiments.
Specific embodiment
Embodiment 1
Using continuous casting steel pipe as raw material, pipe is heated uniformly to 1300 DEG C, the heat time is 3 hours, so as to ensure pipe
Base homogeneous heating；
Perforation：The centering on heat pipe base, then enters eleven punch 11；Piercing temperature is 1000 DEG C；
Machining：Machining and its machining cutting depth on pipe surface, control can remove the casting of pipe surface
In the range of defect；
Annealing：
Anneal for the first time：Pipe after machining is put into annealing furnace, and temperature rises to 750 DEG C, is incubated 1h；
Second of annealing：In-furnace temperature is risen to 800 DEG C, 3h is incubated；
Third time is annealed：In-furnace temperature is down to 740 DEG C, 1h is incubated；
4th annealing：In-furnace temperature is down to 680 DEG C, 1h is incubated；
Pickling：Pickling temperature is 40 DEG C, and pickling time is 40min, and the pipe after pickling rolls in neutralization pond, and roll number of times
For 3 times, neutralizer pH value is 9, and the pipe after neutralization rolls through clear water reserviors, and rolling number of times is 3 times, and the pickle is dilute sulphur
The whole molar concentration of dilute sulfuric acid is 25% in the mixed liquor of acid and sodium chloride solution, pickle, and sodium chloride solution is final concentration of
5%.
Phosphatization：Phosphoric acid zinc concentration is 10%, and phosphating solution temperature is 62 DEG C, and phosphating time is 10 minutes, phosphating solution free acid
Spend for 5, General Acidity in Phosphating Solution is 50, so as to form the chemistry generation overlay film of trbasic zinc phosphate on the surface of pipe；
Saponification：Saponification temperature is 60 DEG C, and saponification time is 6 minutes, and saponification liquor pH value is 8, so as to form gold on overlay film
Belong to the lubricating film coateds such as soap；
Rolling preheating：Pipe after saponification process is pre-heated to 500 DEG C DEG C；
Rolling：It is, by pre-warmed pipe, to import deformation rolling equipment in billet production step, and pipe is pre- at its
Heating-up temperature and its deformation heat produced in the deformation operation of rolling, both are superimposed and are warming up to 900 DEG C DEG C of rolling temperature
Under the conditions of degree, rolled with deformation speed；
Cooling：Environment temperature is cooled to appropriate cooling velocity.
Embodiment 2
Heating：Using continuous casting steel billet as raw material, pipe is heated uniformly to 1350 DEG C, the heat time is 3.5 hours, so as to protect
Demonstrate,prove heating of pipe blank uniform；
Perforation：The centering on heat pipe base, then enters eleven punch 11；Piercing temperature is 1100 DEG C；
Machining：Machining and its machining cutting depth on pipe surface, control can remove the casting of pipe surface
In the range of defect；
Annealing：
Anneal for the first time：Pipe after machining is put into annealing furnace, temperature rises to 755 DEG C, is incubated 1.2h；
Second of annealing：In-furnace temperature is risen to 810 DEG C, 3.2h is incubated；
Third time is annealed：In-furnace temperature is down to 755 DEG C, 1.4h is incubated；
4th annealing：In-furnace temperature is down to 690 DEG C, 1.5h is incubated；
Pickling：Pickling temperature is 42 DEG C, and pickling time is 48min, and the pipe after pickling rolls in neutralization pond, and roll number of times
For 3 times, neutralizer pH value is 9, and the pipe after neutralization rolls through clear water reserviors, and rolling number of times is 3 times, and the pickle is dilute sulphur
The whole molar concentration of dilute sulfuric acid is 27% in the mixed liquor of acid and sodium chloride solution, the pickle, and the sodium chloride solution is whole
Concentration is 6%.
Phosphatization：Phosphoric acid zinc concentration is 15%, and phosphating solution temperature is 65 DEG C, and phosphating time is 12 minutes, phosphating solution free acid
Spend for 6, General Acidity in Phosphating Solution is 55, so that the chemistry generation overlay film of trbasic zinc phosphate is formed on the surface of pipe,；
Saponification：Saponification temperature is 67 DEG C, and saponification time is 7 minutes, and saponification liquor pH value is 8, so as to form gold on overlay film
Belong to the lubricating film coateds such as soap；
Rolling preheating：Pipe after saponification process is pre-heated to 550 DEG C；
Rolling：It is, by pre-warmed pipe, to import deformation rolling equipment in billet production step, and pipe is pre- at its
Heating-up temperature and its deformation heat produced in the deformation operation of rolling, both are superimposed and are warming up to 1050 DEG C of rolling temperature
Under the conditions of, rolled with deformation speed；
Cooling：Environment temperature is cooled to appropriate cooling velocity.
Embodiment 3
Heating：Using continuous casting steel pipe as raw material, pipe is heated uniformly to 1400 DEG C, the heat time is 4 hours, so as to protect
Demonstrate,prove heating of pipe blank uniform；
Perforation：The centering on heat pipe base, then enters eleven punch 11；The piercing temperature is 1200 DEG C；
Machining：Machining and its machining cutting depth on pipe surface, control can remove the casting of pipe surface
In the range of defect；
Annealing：
Anneal for the first time：Pipe after machining is put into annealing furnace, and temperature rises to 760 DEG C, is incubated 1.3h；
Second of annealing：In-furnace temperature is risen to 820 DEG C, 3.5h is handled；
Third time is annealed：In-furnace temperature is down to 770 DEG C .8h is incubated；
4th annealing：In-furnace temperature is down to 700 DEG C, 2h is incubated；
Pickling：Pickling temperature is 45 DEG C, and pickling time is 55min, and the pipe after pickling rolls in neutralization pond, and roll number of times
For 4 times, neutralizer pH value is 10, and the pipe after neutralization rolls through clear water reserviors, and rolling number of times is 4 times, and the pickle is dilute
The whole molar concentration of dilute sulfuric acid is 30%, the sodium chloride solution in the mixed liquor of sulfuric acid and sodium chloride solution, the pickle
Final concentration of 8%.
Phosphatization：Phosphoric acid zinc concentration is 20%, and phosphating solution temperature is 68 DEG C, and phosphating time is 15 minutes, phosphating solution free acid
Spend for 7, General Acidity in Phosphating Solution is 60, so as to form the chemistry generation overlay film of trbasic zinc phosphate on the surface of pipe；
Saponification：Saponification temperature is 85 DEG C, and saponification time is 9 minutes, and saponification liquor pH value is 9, so as to form gold on overlay film
Belong to the lubricating film coateds such as soap；
Rolling preheating：Pipe after saponification process is pre-heated to 600 DEG C；
Rolling：It is, by pre-warmed pipe, to import deformation rolling equipment in billet production step, and pipe is pre- at its
Heating-up temperature and its deformation heat produced in the deformation operation of rolling, both are superimposed and are warming up to 1200 DEG C of rolling temperature
Under the conditions of, rolled with deformation speed；
Cooling：Environment temperature is cooled to appropriate cooling velocity.
It is embodiments of the invention as described above.The present invention is not limited to the above-described embodiments, anyone should learn that
The structure change made under the enlightenment of the present invention, the technical schemes that are same or similar to the present invention each fall within this
Within the protection domain of invention.
Claims (5)
1. the high steel pipe processing method of a kind of lumber recovery, it is characterised in that comprise the following steps：
Heating：Using continuous casting steel pipe as raw material, pipe is heated uniformly to 1300~1400 DEG C, the heat time is 3~4 hours；
Perforation：The centering on heat pipe base, then enters eleven punch 11, and piercing temperature is 1000-1200 DEG C；
Machining：Pipe surface machining after perforation, so as to remove the casting flaw on pipe surface；
Annealing：
Anneal for the first time：Pipe after machining is put into annealing furnace, and temperature rises to 750-760 DEG C, is incubated 1-1.3h；
Second of annealing：In-furnace temperature is risen to 800-820 DEG C, 3-3.5h is incubated；
Third time is annealed：In-furnace temperature is down to 740-770 DEG C, 1-1.8h is incubated；
4th annealing：In-furnace temperature is down to 680-700 DEG C, 1-2h is incubated；
Pipe after annealing sequentially passes through pickling, phosphatization, saponification process；
Rolling preheating：Pipe after saponification process is pre-heated to 500 DEG C~600 DEG C；
Rolling：The pipe after preheating will be rolled and import deformation rolling equipment, pipe is after pre-heating temperature and deformation heat superposition
Temperature is risen to after 900 DEG C~1200 DEG C, is rolled with deformation speed；
Cooling：Environment temperature is cooled to appropriate cooling velocity.
2. the high steel pipe processing method of lumber recovery according to claim 1, it is characterised in that：Pickling in the acid pickling step
Temperature is 40-45 DEG C, and pickling time is 40-55min, and the pipe after pickling rolls in neutralization pond, and rolling number of times is 3~4 times, in
It is 9~10 with liquid pH value, the pipe after neutralization rolls through clear water reserviors, rolling number of times is 3~4 times.
3. the high steel pipe processing method of lumber recovery according to claim 1 or 2, its feature with：In the acid pickling step
Pickle is that the whole molar concentration of dilute sulfuric acid in the mixed liquor of dilute sulfuric acid and sodium chloride solution, the pickle is 25-30%, institute
State the final concentration of 5-8% of sodium chloride solution.
4. the high steel pipe processing method of lumber recovery according to claim 1, it is characterised in that：Phosphoric acid in the phosphorating treatment
Zinc concentration is 10~20%, and phosphating solution temperature is 62~68 DEG C, and phosphating time is 10~15 minutes, and phosphating solution free acidity is 5
~7, General Acidity in Phosphating Solution is 50~60.
5. the high steel pipe processing method of lumber recovery according to claim 1, it is characterised in that：Saponification in the saponification process
Temperature is 60~85 DEG C, and saponification time is 6~9 minutes, and saponification liquor pH value is 8~9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710571328.2A CN107138533A (en) | 2017-07-13 | 2017-07-13 | A kind of high steel pipe processing method of lumber recovery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710571328.2A CN107138533A (en) | 2017-07-13 | 2017-07-13 | A kind of high steel pipe processing method of lumber recovery |
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| Publication Number | Publication Date |
|---|---|
| CN107138533A true CN107138533A (en) | 2017-09-08 |
Family
ID=59776095
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112317540A (en) * | 2020-08-27 | 2021-02-05 | 陈恩义 | Method for processing hollow steel pipe of drill rod |
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| JP2004058128A (en) * | 2002-07-31 | 2004-02-26 | Jfe Steel Kk | Method and device for controlling rolling temperature of steel pipe |
| CN101157096A (en) * | 2007-11-16 | 2008-04-09 | 天津钢管集团股份有限公司 | Technique of controlling and cooling hot-rolled seamless tube online |
| CN103521548A (en) * | 2013-10-25 | 2014-01-22 | 安吉县鹏大钢管有限公司 | Method for manufacturing martensitic steel tube |
| CN104338777A (en) * | 2013-07-31 | 2015-02-11 | 无锡大金高精度冷拔钢管有限公司 | Production method of cold-drawn precision seamless steel pipes |
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