CN104492850B - A kind of production method of best bright finish steel pipe - Google Patents
A kind of production method of best bright finish steel pipe Download PDFInfo
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- CN104492850B CN104492850B CN201410720037.1A CN201410720037A CN104492850B CN 104492850 B CN104492850 B CN 104492850B CN 201410720037 A CN201410720037 A CN 201410720037A CN 104492850 B CN104492850 B CN 104492850B
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- steel
- heating
- pipe blank
- steel pipe
- steel tube
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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
- 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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F17/00—Multi-step processes for surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by subclass C21D or C22F or class C25
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Articles (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses the production method of a kind of best bright finish steel pipe, selecting material is No. 20 steel, the circular pipe blank of a size of 38 × 3mm, include following operating procedure: heating of pipe blank: φ 50mm circular pipe blank is through after the assay was approved, circular pipe blank is sent into rotary heating furnace heating, heating-up temperature is 1200 DEG C ± 10 DEG C, taps after being incubated 50 ± 5 minutes；Perforation: select φ 40mm top, φ 38mm push rod, adjusting piercer roll distance is the laggard eleven punch 11s of parameter such as 40mm, guide plate spacing 48mm, top head front-extending quantity 31mm, drafts 16%, and pierced shell is φ 52 × 4mm；This invention ensures that the surface quality of steel pipe, steel tube surface is smooth, highly polished, consistent with the steel tube surface that non-oxidizing bright is heat-treated, and does not the most affect steel tube performance.Greatly reduce production cost.
Description
Technical field
The present invention relates to steel pipe's production field, particularly belong to the production method of a kind of best bright finish steel pipe.
Background technology
Along with the development of modern technologies, more and more higher to the surface quality requirements of steel pipe.More particularly change
Hot device seamless steel pipe, proposes the highest requirement to steel tube surface fineness.Traditional solid drawn tube becomes
After product are heat-treated, oxidation is serious.And using non-oxidizing bright to be heat-treated, equipment cost is high, technology
Complicated.
Summary of the invention
It is an object of the invention to provide the production method of a kind of best bright finish steel pipe, solve and do not using light nothing
Under conditions of oxidizing thermal treatment, steel tube surface is made to reach the requirement of best bright finish.Neither increase cost, reach simultaneously
Arrive the use requirement of steel pipe.
Technical scheme is as follows:
The production method of a kind of best bright finish steel pipe, selecting material is No. 20 steel, the circle of a size of φ 50mm
Pipe, includes following operating procedure:
1, heating of pipe blank: circular pipe blank, through after the assay was approved, is sent into rotary heating furnace heating by φ 50mm circular pipe blank,
Heating-up temperature is 1200 DEG C ± 10 DEG C, taps after being incubated 50 ± 5 minutes；
2, perforation: select φ 40mm top, φ 38mm push rod, adjusting piercer roll distance is 40mm, leads
Plate spacing 48mm, the laggard eleven punch 11 of parameter such as top head front-extending quantity 31mm, drafts 16%, pierced shell is
φ52×4mm；
3, pickling, phosphatization, saponification: in adjustment pickle, sulfuric acid concentration is between 9%～15%, Fe2+≤ 200g/L,
Pickle temperature is maintained between 30 DEG C～65 DEG C, by φ 52 × 4mm hollow billet pickling, rises after soaking 15min
Cylinder, rinses well with clear water, and in adjustment Phosphating Solution, total acidity is between 16mol/L～28mol/L, free acid
Between 0.1mol/L～1.0mol/L, Phosphating Solution temperature keeps 50 DEG C～70 DEG C, by clean for pickling afterflush
Hollow billet phosphatization, play cylinder after phosphating time 10～15min, then rinse with clear water, adjust aliphatic acid in saponification liquor
Content >=1.0BN, temperature is between 60 DEG C～80 DEG C, by the hollow billet saponification after phosphatization, saponification time 5min～8min
Rear cylinder；
4, cold-drawn: select external mold and the interior mould of φ 32mm of φ 38mm, carry out at the Drawing Force no less than 36 tons
Draw, draw goes out φ 38 × 3mm hollow forging；
5, it is heat-treated: the φ 38 × 3mm hollow forging after cold-drawn is carried out the normalized treatment of 900 DEG C ± 10 DEG C, during insulation
Between 20～30 minutes, air cooling；
6, hollow forging selects φ 38mm external mold after being heat-treated again, and in φ 32mm, mould carries out indeformable cold-drawn, draw
Power is not less than 10 tons.This time draw does not change steel pipe sizes size, utilizes the interior epipolar restriction of cold drawing die to enter
Row oxide skin is cleared up, and makes steel tube surface smooth, highly polished, and does not change steel tube performance；
7, aligning: the production tube after being heat-treated carries out straightening processing, action≤0.2% total length after aligning；Away from pipe
Hold every meter of bending≤1.5mm；
8, cutting: adjust cutting machine according to technological specification, as requested steel pipe is cut, cutting rear cutout tiltedly≤
1.6mm
9, inspection warehouse-in: according to specification, production tube is carried out outward appearance, size is tested, stores.
Advantages of the present invention is as follows:
Using the production technology after improving, it is ensured that the surface quality of steel pipe, steel tube surface is smooth, highly polished,
Consistent with the steel tube surface that non-oxidizing bright is heat-treated, the most do not affect steel tube performance.Greatly reduce production cost.
Five, improve after technique compare improvement with traditional handicraft after technique increase after heat treatment together with indeformable cold
Pull out, make steel tube surface smooth, highly polished, and do not change steel tube performance.Traditional production technology steel tube surface
Oxidation is serious, and surface quality is poor.And using non-oxidizing bright to be heat-treated, although steel tube surface quality is good, bright and clean
Degree height, but because equipment manufacturing cost is high, be heat-treated cost high, cause production cost to be greatly improved.
Detailed description of the invention
The production method of a kind of best bright finish steel pipe, selecting material is No. 20 steel, the circle of a size of φ 50mm
Pipe, includes following operating procedure:
1, heating of pipe blank: circular pipe blank, through after the assay was approved, is sent into rotary heating furnace heating by φ 50mm circular pipe blank,
Heating-up temperature is 1200 DEG C ± 10 DEG C, taps after being incubated 50 ± 5 minutes；
2, perforation: select φ 40mm top, φ 38mm push rod, adjusting piercer roll distance is 40mm, leads
Plate spacing 48mm, the laggard eleven punch 11 of parameter such as top head front-extending quantity 31mm, drafts 16%, pierced shell is
φ52×4mm；
3, pickling, phosphatization, saponification: in adjustment pickle, sulfuric acid concentration is between 9%～15%, Fe2+≤ 200g/L,
Pickle temperature is maintained between 30 DEG C～65 DEG C, by φ 52 × 4mm hollow billet pickling, rises after soaking 15min
Cylinder, rinses well with clear water, and in adjustment Phosphating Solution, total acidity is between 16mol/L～28mol/L, free acid
Between 0.1mol/L～1.0mol/L, Phosphating Solution temperature keeps 50 DEG C～70 DEG C, by clean for pickling afterflush
Hollow billet phosphatization, play cylinder after phosphating time 10～15min, then rinse with clear water, adjust aliphatic acid in saponification liquor
Content >=1.0BN, temperature is between 60 DEG C～80 DEG C, by the hollow billet saponification after phosphatization, saponification time 5min～8min
Rear cylinder；
4, cold-drawn: select external mold and the interior mould of φ 32mm of φ 38mm, carry out at the Drawing Force no less than 36 tons
Draw, draw goes out φ 38 × 3mm hollow forging；
5, it is heat-treated: the φ 38 × 3mm hollow forging after cold-drawn is carried out the normalized treatment of 900 DEG C ± 10 DEG C, during insulation
Between 20～30 minutes, air cooling；
6, hollow forging selects φ 38mm external mold after being heat-treated again, and in φ 32mm, mould carries out indeformable cold-drawn, draw
Power is not less than 10 tons.This time draw does not change steel pipe sizes size, utilizes the interior epipolar restriction of cold drawing die to enter
Row oxide skin is cleared up, and makes steel tube surface smooth, highly polished, and does not change steel tube performance；
7, aligning: the production tube after being heat-treated carries out straightening processing, action≤0.2% total length after aligning；Away from pipe
Hold every meter of bending≤1.5mm；
8, cutting: adjust cutting machine according to technological specification, as requested steel pipe is cut, cutting rear cutout tiltedly≤
1.6mm
9, inspection warehouse-in: according to specification, production tube is carried out outward appearance, size is tested, stores.
After traditional production technology Steel Pipe Heat processes, i.e. aligning, cut, check warehouse-in, steel pipe is owing to being heat-treated
Oxidation, there is oxide skin in surface.And use non-oxidizing bright heat-treatment furnace to be heat-treated, although ensure that steel
The surface quality of pipe, but equipment manufacturing cost is high, and also production cost is greatly improved.Use the production technology after improving
Carrying out indeformable cold-drawn after heat treatment, do not change steel pipe sizes size, in only only passing through cold-drawn, outer mold enters
The cleaning of row oxide skin, makes steel tube surface smooth, highly polished.And steel tube performance does not change.
(with grade of steel for 20, specification is the steel tube performance contrast table that traditional processing technology and present invention process produce
As a example by 38x3mm).
Claims (1)
1. a production method for best bright finish steel pipe, selecting material is No. 20 steel, the circular pipe blank of a size of φ 50mm, it is characterised in that include following operating procedure:
(1), heating of pipe blank: circular pipe blank, through after the assay was approved, is sent into rotary heating furnace heating by φ 50mm circular pipe blank, and heating-up temperature is 1200 DEG C ± 10 DEG C, taps after being incubated 50 ± 5 minutes；
(2), perforation: selecting φ 40mm top, φ 38mm push rod, adjusting piercer roll distance is 40mm, and guide plate spacing 48mm, top head front-extending quantity 31mm, the laggard eleven punch 11 of drafts 16%, pierced shell is φ 52 × 4mm；
null(3)、Pickling、Phosphatization、Saponification: in adjustment pickle, sulfuric acid concentration is between 9% ~ 15%，Fe2+≤200g/L，Pickle temperature is maintained between 30 DEG C ~ 65 DEG C，By φ 52 × 4mm hollow billet pickling，Cylinder is played after soaking 15min，Rinse well with clear water，In adjustment Phosphating Solution, total acidity is between the mol/L of 16mol/L ~ 28，Free acid is between 0.1 mol/L ~ 1.0 mol/L，Phosphating Solution temperature keeps 50 DEG C ~ 70 DEG C，By hollow billet phosphatization clean for pickling afterflush，Cylinder is played after phosphating time 10 ~ 15min，Rinse with clear water again，Adjust content of fatty acid >=1.0BN in saponification liquor，Temperature is between 60 DEG C ~ 80 DEG C，By the hollow billet saponification after phosphatization，Cylinder is played after saponification time 5min ~ 8min；
(4), cold-drawn: selecting external mold and the interior mould of φ 32mm of φ 38mm, carry out draw at the Drawing Force no less than 36 tons, draw goes out φ 38 × 3mm hollow forging；
(5), it is heat-treated: the φ 38 × 3mm hollow forging after cold-drawn is carried out the normalized treatment of 900 DEG C ± 10 DEG C, temperature retention time 20 ~ 30 minutes, air cooling；
(6), hollow forging selects φ 38mm external mold after being heat-treated again, in φ 32mm, mould carries out indeformable cold-drawn, Drawing Force is not less than 10 tons, this time draw does not change steel pipe sizes size, the interior epipolar restriction utilizing cold drawing die carries out oxide skin cleaning, make steel tube surface smooth, highly polished, and do not change steel tube performance；
(7), aligning: the production tube after being heat-treated carries out straightening processing, action≤0.2% total length after aligning；Away from pipe end every meter bending≤1.5mm；
(8), cutting: adjust cutting machine according to technological specification, as requested steel pipe cut, cutting rear cutout tiltedly≤1.6mm；
(9), inspection warehouse-in: according to specification, production tube is carried out outward appearance, size is tested, and stores.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410720037.1A CN104492850B (en) | 2014-12-02 | 2014-12-02 | A kind of production method of best bright finish steel pipe |
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| CN201410720037.1A CN104492850B (en) | 2014-12-02 | 2014-12-02 | A kind of production method of best bright finish steel pipe |
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| CN104492850A CN104492850A (en) | 2015-04-08 |
| CN104492850B true CN104492850B (en) | 2016-08-17 |
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Families Citing this family (10)
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| CN105834237B (en) * | 2016-03-29 | 2018-02-09 | 重庆钢铁(集团)有限责任公司 | A kind of hollow forging chemical treatment method for reducing cold-drawn passage |
| CN105834234B (en) * | 2016-03-29 | 2018-01-16 | 重庆钢铁(集团)有限责任公司 | A kind of method that two passage even pulls out production cold drawing steel tube |
| CN106216950B (en) * | 2016-07-29 | 2018-11-16 | 新昌县长城空调部件股份有限公司 | Gas-fired kitchen pipeline manufacturing process |
| CN107520271A (en) * | 2017-08-03 | 2017-12-29 | 常熟市异型钢管有限公司 | The production technology of the special-shaped steel high pressure seamless pipe of waste heat boiler |
| CN108127003A (en) * | 2017-12-06 | 2018-06-08 | 江苏银环精密钢管有限公司 | A kind of manufacturing method of drilling tool 23CrNi3Mo steel alloy seamless pipes |
| CN109604342A (en) * | 2018-11-14 | 2019-04-12 | 张家港华程特种材料股份有限公司 | A kind of processing method of seamless steel pipe |
| CN109457098A (en) * | 2018-12-28 | 2019-03-12 | 江苏建中新材料科技有限公司 | A kind of process improving mild steel steel strength |
| CN111041404B (en) * | 2019-12-09 | 2024-03-15 | 朗瑞(泰州)金属工具有限公司 | Heat treatment method for steel pipe plug |
| CN113618408B (en) * | 2021-08-06 | 2022-07-29 | 南京斯迈柯特种金属装备股份有限公司 | Thick-wall alloy preparation and processing technology |
| CN115572894B (en) * | 2022-09-08 | 2023-06-09 | 衢州垣发机械有限公司 | Inner tube of steam friction damper and preparation process thereof |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4019772B2 (en) * | 2002-04-18 | 2007-12-12 | 住友金属工業株式会社 | Seamless pipe manufacturing method |
| CN101767114B (en) * | 2009-12-23 | 2012-05-30 | 攀钢集团钢铁钒钛股份有限公司 | Method for removing oxide skin in tube blank of seamless steel tube |
| CN102345035B (en) * | 2010-07-30 | 2013-01-30 | 宝鸡市海鹏金属材料有限公司 | Production process for titanium and nickel shape memory alloy material |
| CN102233365A (en) * | 2011-07-11 | 2011-11-09 | 徐州市全球通精密钢管有限公司 | Manufacturing process of small-diameter seamless steel tubes |
| CN103846304A (en) * | 2012-11-28 | 2014-06-11 | 常州盛德无缝钢管有限公司 | ND steel seamless steel pipe production process |
| CN203389984U (en) * | 2013-07-30 | 2014-01-15 | 无锡大金高精度冷拔钢管有限公司 | Special equipment for producing high-rigidity cold-drawn steel pipe |
| CN103691760A (en) * | 2013-12-17 | 2014-04-02 | 上海奉贤钢管厂 | Preparation process of stainless steel tube |
| CN103909111A (en) * | 2014-03-27 | 2014-07-09 | 攀钢集团成都钢钒有限公司 | Titanium alloy seamless tube and production method thereof |
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