CN102618755A - Seamless steel pipe and manufacturing method thereof - Google Patents
Seamless steel pipe and manufacturing method thereof Download PDFInfo
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- CN102618755A CN102618755A CN2012100756325A CN201210075632A CN102618755A CN 102618755 A CN102618755 A CN 102618755A CN 2012100756325 A CN2012100756325 A CN 2012100756325A CN 201210075632 A CN201210075632 A CN 201210075632A CN 102618755 A CN102618755 A CN 102618755A
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Abstract
The invention discloses a seamless steel pipe and a manufacturing method thereof. The seamless steel pipe comprises nickel, chromium, molybdenum, iron, tungsten, cobalt, carbon, manganese, silicon, vanadium, phosphorus and sulfur. The manufacturing method comprises the following steps of: (1) checking a material and performing acid washing on the material for the first time; (2) polishing a blank which is subjected to acid washing, performing combined rolling and drawing, and deoiling; (3) judging whether finished product requirements are met, performing solid solution heat treatment, straightening and acid washing on an intermediate product and repeating the step 2 if the finished product requirements are not met; and (4) performing solid solution heat treatment, straightening, fixed cutting, acid washing and checking on a finished product if the finished product requirements are met, wherein the temperature of the solid solution heat treatment of the intermediate product ranges from 1,170 DEG C to 1,190 DEG C; and the temperature of the solid solution heat treatment of the finished product ranges from 1,150 DEG C to 1,170 DEG C. The seamless steel pipe has the advantages of corrosion resistance, high temperature resistance, strong acid resistance, strong alkali resistance and saved cost.
Description
Technical field
The present invention relates to a kind of weldless steel tube and method of manufacture thereof, be specifically related to a kind of Hastelloy stainless-steel seamless pipe and method of manufacture thereof.
Background technology
Weldless steel tube is a kind of circle that hollow section, periphery do not have seam that has, and is square, the rectangle steel.Weldless steel tube is to process hollow billet with steel ingot or solid pipe perforated, processes through hot rolling, cold rolling or cold group then.Weldless steel tube has hollow section; A large amount of pipelines as conveyance fluid, solid steel such as steel pipe and round steel are compared, when the bending resistance twisting strength is identical; Weight is lighter; Be a kind of Economic Section steel, be widely used in manufacturing structure spare and mechanical component, like steel scaffolding of using in oil drill rocker, truck drive shaft, bicycle frame and the building operation etc.
At aspects such as some high temperature, the mineral acid that is mixed with impurity and organic acid (like formic acid and acetate), corrosive environment of sea water, general stainless steel tube can't widespread use in this environment, and maintenance cost is bigger, can't promote on a large scale.
Therefore, the weldless steel tube of research and develop a kind of corrosion-resistant, high temperature resistant, anti-strong acid, anti-highly basic, practicing thrift cost is a problem demanding prompt solution.
Summary of the invention
The object of the present invention is to provide the weldless steel tube and the method for manufacture thereof of a kind of corrosion-resistant, high temperature resistant, anti-strong acid, anti-highly basic, saving cost.
Technical scheme of the present invention is: a kind of weldless steel tube and method of manufacture thereof, described weldless steel tube comprise the chromium of weight percent between 14.5%-16.5%, and weight percent is between the molybdenum of 15%-17%; Weight percent is between the iron of 4%-7%, and weight percent is between the tungsten of 3%-4.5%, and weight percent is smaller or equal to 2.5% cobalt; Weight percent is smaller or equal to 0.01% carbon, and weight percent is smaller or equal to 1% manganese, and weight percent is smaller or equal to 0.08% silicon; Weight percent is smaller or equal to 0.35% vanadium; Weight percent is smaller or equal to 0.04% phosphorus, and weight percent is smaller or equal to 0.03% sulphur, and the nickel of surplus.
Method of manufacture comprises following steps: (1) experimental material also carries out the pickling first time to material,
(2) blank with pickling carries out reconditioning, rolls and pull out associating, deoil,
(3) judge whether to satisfy the finished product requirement, then carry out centre article solution heat treatment, aligning, pickling and repeating step 2 if not,
(4) if carry out then that finished product solution heat treatment, aligning, finished product are cut surely, finished product acid-washing, inspection after construction,
The temperature of article solution heat treatment is between 1170 ℃-1190 ℃ in the middle of said, and said finished product solution heat treatment temperature is between 1150 ℃-1170 ℃.
In preferred embodiment of the present invention, said experimental material comprises dimensional inspection, surface check, chemical ingredients check and mechanical properties test.
In preferred embodiment of the present invention, said pickling is used and is contained mass percent in the solution and be the nitric acid of 12%-15% and the mass percent hydrofluoric acid as 5%-8%, and the Acidwash solution temperature is between 20 ℃-30 ℃.
In preferred embodiment of the present invention, said roll pull out associating the small deformation amount between 1.3%-1.6%.
In preferred embodiment of the present invention, containing nitric acid and the mass percent that mass percent is 12%-15% in the said step of deoiling is the solution of the hydrofluoric acid of 1%-2%.
In preferred embodiment of the present invention, said inspection after construction comprises surperficial check, hydraulic test, eddy current test check, UT check, intergranular corrosion check, grain fineness number check, pulling force check, enlarging check, flattens check, Hardness Surveillance and analysis of carbon and sulfur check.
According to the invention is a kind of weldless steel tube and method of manufacture thereof, makes weldless steel tube have corrosion-resistant, high temperature resistant, anti-strong acid, anti-alkaline performance, and has practiced thrift cost.
Description of drawings
Fig. 1 is the functional block diagram in weldless steel tube of the present invention and method of manufacture one preferred embodiment thereof.
Embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present invention is set forth in detail, thereby protection scope of the present invention is made more explicit defining so that advantage of the present invention and characteristic can be easier to it will be appreciated by those skilled in the art that.
According to the invention is a kind of weldless steel tube and method of manufacture thereof, and the prescription of this weldless steel tube is weight percentage between the chromium of 14.5%-16.5%, and weight percent is between the molybdenum of 15%-17%; Weight percent is between the iron of 4%-7%, and weight percent is between the tungsten of 3%-4.5%, and weight percent is smaller or equal to 2.5% cobalt; Weight percent is smaller or equal to 0.01% carbon, and weight percent is smaller or equal to 1% manganese, and weight percent is smaller or equal to 0.08% silicon; Weight percent is smaller or equal to 0.35% vanadium; Weight percent is smaller or equal to 0.04% phosphorus, and weight percent is smaller or equal to 0.03% sulphur, and the nickel of surplus.
Production stage is following; (1) experimental material and material carried out the pickling first time; (2) blank with pickling carries out reconditioning, rolls and pull out associating, deoil; (3) judge whether to satisfy the finished product requirement, then carry out centre article solution heat treatment, aligning, pickling and repeating step 2 if not, (4) are if carry out then that finished product solution heat treatment, aligning, finished product are cut surely, finished product acid-washing, inspection after construction; The temperature of article solution heat treatment is between 1170 ℃-1190 ℃ in the middle of said, and said finished product solution heat treatment temperature is between 1150 ℃-1170 ℃.Concrete steps are referring to accompanying drawing 1: materiology S01 is meant material is tested that this check comprises dimensional inspection, surface check, chemical ingredients check and mechanical properties test.
The S02 of pickling for the first time is that the employing mass percent is the nitric acid of 12%-15% and the hydrofluoric acid mixing acid that mass percent is 5%-8%; And the Acidwash solution of temperature between 20 ℃-30 ℃ carries out pickling; Time is 3-3.5 hour, and the previous pretreated oxide debris of eccysis is so that following process.
Reconditioning S03 is slight crack, the burr that polishes off the blank after the pickling, so that follow-up equipment carries out processing treatment to blank, and reconditioning handles at least and handle once, can carry out repeatedly reconditioning and handle.
Roll and pull out associating S04, the small deformation amount adopts method cold rolling, cold-drawn to carry out continuous reaming earlier between 1.3%-1.6%, and hole expansibility is followed successively by 2%, 1%, 1%, need not pickling recycling reaming, and hole expansibility is followed successively by 1.5%, 1.5%, carries out pinch pass then.In the course of processing, can add cold-rolled lubricating oil, reduce frictional coefficient, reduce energy consumption, and improve the luminance brightness on surface, make cooling performance better.
The S05 that deoils should guarantee the cleaning of pipe in heat treatment process, can not contact sulphur, phosphorus, lead and other low melting point metal; Otherwise can damage the performance of blank, should note removing such as dirts such as lubricating oil, fuel, a kind of to contain nitric acid and the mass percent that mass percent is 12%-15% be the solution of the hydrofluoric acid of 1%-2%; Period is about 40 minutes; Can play the effect of deoiling fast and effectively, and tube surface is not had the influence of turning white of any peracid, so that subsequent production.
The treatment temp of middle article solution heat treatment S06 is heat-treated under this temperature between 1170 ℃-1190 ℃, helps to promote the quality of steel pipe, after the maintenance regular hour, and cool to room temperature.Through middle article solution heat treatment, the hardness of weldless steel tube reduces, and has very high work hardening capacity and good wear resistance and toughness; Not only be convenient to follow-up operation, and hardness can be strengthened constantly also in the process of following process, make the steel pipe composition all with change; Crystal grain thinning eliminates stress, and has improved toughness and extensibility; Improve mechanical property, comprehensive mechanical performance is good.
Aligning S07 is meant rolling and heat-treats after pulling out joint step; Weldless steel tube can produce certain deformation; So need align weldless steel tube, method for aligning can be gag press straightening, roll straightening (comprising straight roller aligning and cross roll aligning), tension straightening and stretch-bend leveller.
Pickling S08 is that the employing mass percent is the nitric acid of 12%-15% and the hydrofluoric acid mixing acid that mass percent is 5%-8%; And the Acidwash solution of temperature between 20 ℃-30 ℃ carries out pickling; Time is 3-3.5 hour, and the previous pretreated oxide debris of eccysis is so that following process.
The treatment temp of finished product solution heat treatment S09 is between 1150 ℃-1170 ℃; The high-temperature zone is (2-3) min/mm to the relation of coming out of the stove between soaking time and the weldless steel tube wall thickness; Min is meant soaking time, and mm is meant the weldless steel tube wall thickness, and general soaking time is 40 minutes; The type of cooling adopts air cooling, is follow-up 1.1-1.2 times of being convenient to finished surface corrosion resistance nature raising superior performance standard.
Finished product is cut S10 surely and is meant the size that weldless steel tube is cut into client's needs.
Finished product acid-washing S11 is that the employing mass percent is the nitric acid of 12%-15% and the hydrofluoric acid mixing acid that mass percent is 5%-8%; And the Acidwash solution of temperature between 20 ℃-30 ℃ carries out pickling; Time is 3-3.5 hour; The eccysis finished product is cut S10 surely to the damage that steel pipe causes, and guarantees the quality of finished product.
Inspection after construction S12 tests to weldless steel tube, and inspection content comprises surperficial check, hydraulic test, eddy current test check, UT check, intergranular corrosion check, grain fineness number check, pulling force check, enlarging check, flattens check, Hardness Surveillance and analysis of carbon and sulfur check.
Further set forth in conjunction with 1 pair of method of manufacture of the present invention of accompanying drawing, at first the raw material to weldless steel tube carries out materiology S01, guarantees material quality; So that following process; Confirm to carry out after qualified next step operation pickling for the first time S02, the oxide debris on the eccysis raw material is so that following process; With the raw material after the pickling carry out reconditioning S03, roll pull out associating S04, S05 deoils; And judge whether weldless steel tube meets the requirement of finished product, if do not reach the finished product requirement, then carry out centre article solution heat treatment S06, aligning S07, pickling S08 step; Return operation again after the reconditioning S03 step, then carry out finished product thermal treatment S09, aligning S07, finished product and cut S10, finished product acid-washing S11, inspection after construction S12 step surely if meet the demands.Wherein reconditioning S03 step and finished product acid-washing S11 step can repeatedly circulate.
This weldless steel tube is Hastelloy C-276, the physicals of Hastelloy C-276 such as following table:
| Density | 8.9 g/cm3 |
| Fusing point | 1325-1370?℃ |
Hastelloy C-276 is the mechanical property such as the following table of factory's inner control at normal temperatures:
| Alloy state | Tensile strength Rm N/mm2 | Ys RP0.2 N/mm2 | Unit elongation A% |
| Gu melt | 760-830 | 310-340 | 55-65 |
Hastelloy C-276 characteristic:
1. under oxidation and reduced state, most of corrosive mediums had excellent erosion resistance; 2. outstanding anti-pitting attack, crevice corrosion and stress corrosion crack performance.
The structure of Hastelloy C-276: C276 is a centroid cubic lattice structure.
The erosion resistance of Hastelloy C-276: the C276 alloy is applicable to the various chemical process industry that contain oxidation and reductant.Higher molybdenum, chromium content make the erosion that alloy can anti-chlorine ion, and W elements has also further improved its erosion resistance.C276 be only several kinds can humidity chlorine, one of hypochlorite and ClO 2 solution corrosive material, this alloy has significant erosion resistance (like iron(ic)chloride and cupric chloride) to the chlorate solution of high density.
Hastelloy C-276 range of application Application Areas has: the C276 alloy has obtained using widely at chemical industry and petrochemical field; As be applied in the contact organic element of chloride and the catalysis system, this material is particluarly suitable for high temperature, be mixed with in mineral acid and organic acid (like formic acid and acetate), the corrosive environment of sea water of impurity and use; Pulp and paper industry is like digestion and bleaching container; Washing tower in the FGD system, reheater, wet steam fan etc.; The equipment of operation and element in the sour gas environment; The reactor drum of acetate and acid product; The condensation of sulfuric acid device; Methylene hexichol isocyanate (MDI); The production of impure phosphoric acid and processing.
According to the invention is a kind of weldless steel tube and method of manufacture thereof, makes weldless steel tube have corrosion-resistant, high temperature resistant, anti-strong acid, anti-alkaline performance, and has practiced thrift cost.
The above is merely embodiment of the present invention; But protection scope of the present invention is not limited thereto; Any those of ordinary skill in the art are in the technical scope that the present invention disclosed; Variation or the replacement that can expect without creative work all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain that claims were limited.
Claims (6)
1. weldless steel tube and method of manufacture thereof, it is characterized in that: described weldless steel tube comprises the chromium of weight percent between 14.5%-16.5%, and weight percent is between the molybdenum of 15%-17%; Weight percent is between the iron of 4%-7%, and weight percent is between the tungsten of 3%-4.5%, and weight percent is smaller or equal to 2.5% cobalt; Weight percent is smaller or equal to 0.01% carbon, and weight percent is smaller or equal to 1% manganese, and weight percent is smaller or equal to 0.08% silicon; Weight percent is smaller or equal to 0.35% vanadium; Weight percent is smaller or equal to 0.04% phosphorus, and weight percent is smaller or equal to 0.03% sulphur, and the nickel of surplus;
Method of manufacture comprises following steps: (1) experimental material also carries out the pickling first time to material,
(2) blank with pickling carries out reconditioning, rolls and pull out associating, deoil,
(3) judge whether to satisfy the finished product requirement, then carry out centre article solution heat treatment, aligning, pickling and repeating step 2 if not,
(4) if carry out then that finished product solution heat treatment, aligning, finished product are cut surely, finished product acid-washing, inspection after construction,
The temperature of article solution heat treatment is between 1170 ℃-1190 ℃ in the middle of said, and said finished product solution heat treatment temperature is between 1150 ℃-1170 ℃.
2. the method for manufacture of weldless steel tube according to claim 1 is characterized in that: said experimental material comprises dimensional inspection, surface check, chemical ingredients check and mechanical properties test.
3. the method for manufacture of weldless steel tube according to claim 1; It is characterized in that: said pickling is used and is contained mass percent in the solution and be the nitric acid of 12%-15% and the mass percent hydrofluoric acid as 5%-8%, and the Acidwash solution temperature is between 20 ℃-30 ℃.
4. the method for manufacture of weldless steel tube according to claim 1 is characterized in that: said roll pull out associating the small deformation amount between 1.3%-1.6%.
5. the method for manufacture of weldless steel tube according to claim 1, it is characterized in that: containing nitric acid and the mass percent that mass percent is 12%-15% in the said step of deoiling is the solution of the hydrofluoric acid of 1%-2%.
6. the method for manufacture of weldless steel tube according to claim 1 is characterized in that: said inspection after construction comprises surperficial check, hydraulic test, eddy current test check, UT check, intergranular corrosion check, grain fineness number check, pulling force check, enlarging check, flattens check, Hardness Surveillance and analysis of carbon and sulfur check.
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| CN2012100756325A CN102618755A (en) | 2012-03-21 | 2012-03-21 | Seamless steel pipe and manufacturing method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102876927A (en) * | 2012-09-27 | 2013-01-16 | 无锡宏昌五金制造有限公司 | Improved hastelloy |
| CN103212603A (en) * | 2013-04-12 | 2013-07-24 | 苏州贝思特金属制品有限公司 | Hastelloy stainless steel seamless steel pipe |
| CN103322336A (en) * | 2013-06-25 | 2013-09-25 | 浙江国邦钢业有限公司 | Nickel-copper alloy pipe producing technology and nickel-copper alloy seamless steel pipe |
| CN104174689A (en) * | 2014-07-21 | 2014-12-03 | 苏州贝思特金属制品有限公司 | Method for manufacturing 13CrMo44 alloy seamless steel pipe |
| CN104475480A (en) * | 2014-11-05 | 2015-04-01 | 攀钢集团江油长城特殊钢有限公司 | Hastelloy C276 pierced billet and tube and hot extrusion manufacturing method of two |
| CN106086528A (en) * | 2016-07-29 | 2016-11-09 | 上海屹禾合金材料科技有限公司 | There is nickel-base alloy and the smelting process thereof forging high yield |
| CN117947247A (en) * | 2024-03-27 | 2024-04-30 | 烟台哈尔滨工程大学研究院 | Seamless thin-wall high-nitrogen steel pipe and preparation method thereof |
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| US3674979A (en) * | 1970-09-23 | 1972-07-04 | Coast Metals Inc | Method of arc welding |
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2012
- 2012-03-21 CN CN2012100756325A patent/CN102618755A/en active Pending
Patent Citations (3)
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| US3674979A (en) * | 1970-09-23 | 1972-07-04 | Coast Metals Inc | Method of arc welding |
| JPH08135947A (en) * | 1994-11-11 | 1996-05-31 | Katsuhiro Ito | Structure in converter type incinerator |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102876927A (en) * | 2012-09-27 | 2013-01-16 | 无锡宏昌五金制造有限公司 | Improved hastelloy |
| CN103212603A (en) * | 2013-04-12 | 2013-07-24 | 苏州贝思特金属制品有限公司 | Hastelloy stainless steel seamless steel pipe |
| CN103322336A (en) * | 2013-06-25 | 2013-09-25 | 浙江国邦钢业有限公司 | Nickel-copper alloy pipe producing technology and nickel-copper alloy seamless steel pipe |
| CN104174689A (en) * | 2014-07-21 | 2014-12-03 | 苏州贝思特金属制品有限公司 | Method for manufacturing 13CrMo44 alloy seamless steel pipe |
| CN104475480A (en) * | 2014-11-05 | 2015-04-01 | 攀钢集团江油长城特殊钢有限公司 | Hastelloy C276 pierced billet and tube and hot extrusion manufacturing method of two |
| CN106086528A (en) * | 2016-07-29 | 2016-11-09 | 上海屹禾合金材料科技有限公司 | There is nickel-base alloy and the smelting process thereof forging high yield |
| CN117947247A (en) * | 2024-03-27 | 2024-04-30 | 烟台哈尔滨工程大学研究院 | Seamless thin-wall high-nitrogen steel pipe and preparation method thereof |
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Application publication date: 20120801 |