CN101671773A - Method for manufacturing seamless steel tube - Google Patents
Method for manufacturing seamless steel tube Download PDFInfo
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- CN101671773A CN101671773A CN200910034541A CN200910034541A CN101671773A CN 101671773 A CN101671773 A CN 101671773A CN 200910034541 A CN200910034541 A CN 200910034541A CN 200910034541 A CN200910034541 A CN 200910034541A CN 101671773 A CN101671773 A CN 101671773A
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Abstract
The invention discloses a method for manufacturing a seamless steel tube. The method is used for manufacturing a urea class seamless steel tube and comprises the following steps: (1) carrying out low-temperature punching on a round bar around the temperature of 1,040 DEG C; (2) carrying out acid-washing on an obtained blank for the first time; (3) carrying polishing, rolling and pulling combination and oil removal on the acid-washed blank; (4) judging whether an obtained product meets the requirement of a finished product or not; if not, carrying out intermediate product solid solution heat treatment, straightening and acid washing and repeating the step (3); (5) if so, carrying out finished product solid solution heat treatment, straightening and finished product cutting to length; and (6) acid-washing the finished product. The invention solves the problems of the prior art and provides the method for manufacturing the seamless steel tube, which saves the energy and has simple workingprocedures.
Description
Technical field
The present invention relates to a kind of manufacture method of weldless steel tube, particularly relate to a kind of manufacture method of urea class stainless steel weldless steel tube.
Background technology
Weldless steel tube is a kind of rectangular steel that hollow section, periphery do not have seam that have.Weldless steel tube is because of having hollow section, so in a large number as the pipeline of conveyance fluid, as the pipeline of transfer oil, Sweet natural gas, coal gas, water and some solid materials etc.Weldless steel tube is compared with solid steel such as round steel, when the bending resistance twisting strength was identical, weight was lighter, was a kind of economic cross-section steel, also be widely used in manufacturing structure spare and mechanical component, as steel scaffolding of using in oil drill rocker, truck drive shaft, bicycle frame and the building operation etc., make ring-shaped work pieces with weldless steel tube, can improve material use efficiency, simplify manufacturing process, economical with materials and machining period as rolling bearing lasso, screw block cover etc., are extensively made with weldless steel tube at present.Weldless steel tube still is various conventional weapon indispensable material, and gun barrel, gun barrel etc. is all wanted weldless steel tube manufacturing.
UNS S31050 (GB: 00Cr25Ni22M02N)/1.4466, principal character: have severe corrosive, the good welding performance of high temperature, high pressure urea first ammonium solution, be specifically designed to urea industry, so claim urea class stainless steel.Urea class stainless steel all needs to stop coomb's test Coomb and selective corrosion test.Test conditions is very harsh, general stainless steel be difficult to by, corresponding steel tube manufacture technique is also different with steel grade in the past.
Summary of the invention
For overcoming above-mentioned shortcoming, the object of the present invention is to provide the manufacture method of a kind of save energy, the simple weldless steel tube of operation.
In order to reach above purpose, the technical solution used in the present invention is: a kind of manufacture method of weldless steel tube, be used to make the urea class stainless steel weldless steel tube, and comprise following steps:
1) near 1040 ℃ of temperature, pole is carried out the low temperature perforation;
2) blank is carried out the pickling first time;
3) blank to pickling carries out reconditioning, rolls and pull out associating, deoil;
4) judge whether to satisfy the finished product requirement, as otherwise carry out centre product solution heat treatment, aligning, pickling and repeat the 3rd the step;
5) then carrying out finished product solution heat treatment, aligning and finished product in this way cuts surely;
6) finished product is carried out pickling.
As a preferred embodiment of the present invention, described during to centre product solution heat treatment, temperature is 1040 ℃.
As a preferred embodiment of the present invention, described during to the finished product solution heat treatment, temperature is 1020 ℃.
As a preferred embodiment of the present invention, described urea class stainless steel comprises:
Weight percent is no more than 0.02% C;
The Cr of weight percent between 24.0% to 26.0%;
The Ni of weight percent between 21.0% to 23.0%;
The Mo of weight percent between 2.0% to 2.5%;
The N of weight percent between 0.1% to 0.16%;
Weight percent is no more than 0.7% Si;
Weight percent is no more than 2.0% Mn;
Weight percent is no more than 0.025% P;
Weight percent is no more than 0.010% S;
And the Fe of surplus.
As a preferred embodiment of the present invention, described blank is carried out also having a materiology step before the acid pickling step first time, described materiology step comprises dimensional inspection, surperficial check, quality test, Chemical Composition check.
As a preferred embodiment of the present invention, also has an inspection after construction step after the described finished product acid-washing step.
As a preferred embodiment of the present invention, described inspection after construction comprises surface check, hydraulic pressure detection, eddy current test, UT (Ultrasonic Testing), intergranular corrosion test, grain fineness number test, tensile test, flaring test, flattening test, hardness test, analysis of carbon and sulfur.
Owing to adopted technique scheme, make the present invention have the following advantages: through repeatedly reconditioning, Ping Kou, deoil, operations such as solution heat treatment, aligning, pickling, product quality guarantees; The stainless-steel pipe that produces under corresponding work in-process and finished product solution heat treatment condition has severe corrosive, the good welding performance of high temperature, high pressure urea first ammonium solution.
Description of drawings
Accompanying drawing 1 is the schema of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present invention is described in detail, thereby protection scope of the present invention is made more explicit defining so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that.
The method of manufacturing seamless steel pipe that the present invention discloses is mainly used in the manufacturing urea class stainless steel, concrete for the trade mark be UNS S31050 (GB: stainless steel 00Cr25Ni22M02N)/1.4466, it comprises:
Weight percent is no more than 0.02% C;
The Cr of weight percent between 24.0% to 26.0%;
The Ni of weight percent between 21.0% to 23.0%;
The Mo of weight percent between 2.0% to 2.5%;
The N of weight percent between 0.1% to 0.16%;
Weight percent is no more than 0.7% Si;
Weight percent is no more than 2.0% Mn;
Weight percent is no more than 0.025% P;
Weight percent is no more than 0.010% S;
And the Fe of surplus.
Use urea class stainless steel to do weldless steel tube, make weldless steel tube have severe corrosive, the good welding performance of high temperature, high pressure urea first ammonium solution.
The physicals of this steel grade is:
Density: 7.9g/cm3
Young's modulus: 158-195GPa
Thermal conductivity: 13W/m ℃
Hardness: Rockwell B≤95
Thermal expansivity (20-100 ℃): 15.5x10
-6℃
Working temperature is measured approximately :-200 to+300 ℃
Be mainly used in chemical industry, oil, urea equipment is made forging, bar, sheet material, band, ring, silk material, bolt, spring etc. and is consulted supply.
Referring to accompanying drawing 1, low temperature perforation S00 is meant that be to bore a hole under 1040 ℃ pole in temperature, forms blank.By under this temperature, boring a hole, can improve the intergranular corrosion ability, reduce metal consumption, saved the energy, improve the pipe lumber recovery, national resources is not caused waste.
Materiology S01 refers to raw material is tested, and comprises dimensional inspection, surperficial check, quality test, Chemical Composition check.
The S02 of pickling for the first time is meant and uses pickle solution that the steel pipe raw material is carried out pickling that the oxide compound on the eccysis raw material is convenient to following process.
Reconditioning S03 is that the fault location on the raw material is polished off, and is convenient to following process equipment weldless steel tube is handled.
Blank after the reconditioning is put down mouth, taken the lead or two steps of soldering tip, pull out associating S05 and prepare for rolling, the small deformation amount is gone into=1.15-1.45, is meant by processing raw material with method cold rolling, cold-drawn, make raw material form the method for steel pipe type, in the engineering of processing, can in cold-rolling process, add cold-rolled lubricating oil, behind the adding cold-rolled lubricating oil, can effectively reduce coefficient of friction, corresponding rolling load is provided, and required power is low, obtains satisfied rolling parameter; Make the surface brightness height, roll that to prolong thickness even; Good cooling results can be taken away rolling heat rapidly, protection roll and rolled piece; The rustless property that short-term is arranged can provide rolled piece interim corrosion protection.Cold-drawn is exactly under situation about not heating metal to be pulled out with drawbench, and cold rolling and cold-drawn does not need heating, makes technology at high temperature carry out save energy.
The S06 that deoils because roll pull out often need among the associating S05 lubricated, add cold rolling wet goods subsidiary material, so need one these auxiliary oil are removed, make things convenient for subsequent production.
Middle product solution heat treatment S07 refers to the centre product are heated to 1040 ℃, after the maintenance regular hour, is cooled fast to the operation of room temperature.Under this temperature, carry out solution heat treatment, help to promote the quality of steel pipe.After middle product solution heat treatment step, the hardness of weldless steel tube can be lower, but have 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.
Aligning S08 is meant the rectification that the shape defect to weldless steel tube carries out, heat-treat after pulling out joint step rolling, weldless steel tube can produce certain deformation, so need align S07 to 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 S09 refers to utilize acid solution to remove the method for its lip-deep oxide skin and corrosion thing to the weldless steel tube of producing.
Finished product solution heat treatment S10, finished product solution heat treatment S10 is heated to weldless steel tube between 1020 ℃, pass between soaking time and the weldless steel tube wall thickness is (3-4) min/mm, wherein mm represents the unit millimeter of wall thickness, min represents the unit minute of soaking time, and soaking time is generally 3-4 wall thickness doubly on this basis.After above-mentioned work in-process and finished product solution heat treatment, especially under suitable temperature, the steel pipe of manufacturing can be given full play to the excellent properties of this steel grade.Especially make the steel pipe composition all with change, crystal grain thinning eliminates stress, and has improved toughness and extensibility, improves mechanical property, comprehensive mechanical performance is good.Carry out tissue for next process and prepare, more can reach bright and clean surface quality after the pickling.
It is the size that weldless steel tube is cut into requirement that finished product is cut S11 surely.
Finished product acid-washing S12 utilizes acid solution to remove the method for its lip-deep oxide skin and corrosion thing to weldless steel tube, because after finished product is cut S10 surely, may still can cause damage to weldless steel tube, so also need at last to carry out this step, guarantees the quality of finished product.
Inspection after construction S13 tests to the weldless steel tube that production is finished, and the content of inspection after construction can be checked for the surface, hydraulic pressure detection, eddy current test, UT (Ultrasonic Testing), intergranular corrosion test, grain fineness number test, tensile test, flaring test, flattening test, hardness test, analysis of carbon and sulfur.
Introduce the manufacturing processed of weldless steel tube in detail below in conjunction with accompanying drawing 1, at first with pole through low temperature perforation S00, under this temperature through perforation after, form blank, need carry out materiology S01 before the blank production of weldless steel tube, be used to guarantee the quality of raw material, guarantee the yield of subsequent production; Carry out pickling first time S02 through the qualified weldless steel tube raw material of materiology S01, be used for the oxide compound on the eccysis raw material, be convenient to following process; Through beginning step reconditioning S03 successively behind the S02 of pickling for the first time, flat mouthful, take the lead or soldering tip, roll then and pull out associating S05, S06 deoils, at this moment need to judge whether the weldless steel tube of producing has reached the requirement of finished product, if do not reach the requirement of finished product, then carry out centre product solution heat treatment S07, aligning S08, pickling S09, and then carry out reconditioning S03, roll and pull out associating S05, S06 deoils, and judge whether to reach the finished product requirement, if reached the requirement of finished product, then carry out finished product solution heat treatment S10 successively, aligning S08, finished product is cut S11 surely, finished product acid-washing S12, what need mention especially is, can set circulation according to the needs of producing and repeat repeatedly middle product solution heat treatment S07, aligning S08, pickling S09, reconditioning S03, roll and pull out associating S05, S06 deoils, the round-robin number of times can be set difference according to different raw materials with different sizes, after setting the fixed cycle index, follow-up industrial production just can be produced according to the cycle index of setting, and do not need manually to judge, save manpower, also be beneficial to industrial linking up with quick; Whether after completed weldless steel tube finished product pickling S12, can set as required needs to carry out inspection after construction S13, and the project that forms product check S13 also can be set according to different needs.
By above-mentioned embodiment, be not difficult to find out that the present invention is the manufacture method of a kind of save energy, the simple weldless steel tube of operation.
The above; it only is the specific 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 disclosed technical scope of the present invention; 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 (7)
1, a kind of manufacture method of weldless steel tube is used to make the urea class stainless steel weldless steel tube, comprises following steps:
1) near 1040 ℃ of temperature, pole is carried out the low temperature perforation;
2) blank is carried out the pickling first time;
3) blank to pickling carries out reconditioning, rolls and pull out associating, deoil;
4) judge whether to satisfy the finished product requirement, as otherwise carry out centre product solution heat treatment, aligning, pickling and repeat the 3rd the step;
5) then carrying out finished product solution heat treatment, aligning and finished product in this way cuts surely;
6) finished product is carried out pickling.
2, a kind of manufacture method of weldless steel tube as claimed in claim 1, its feature exists: described during to centre product solution heat treatment, temperature is 1040 ℃.
3, a kind of manufacture method of weldless steel tube as claimed in claim 2 is characterized in that: described during to the finished product solution heat treatment, temperature is 1020 ℃.
4, a kind of manufacture method of weldless steel tube as claimed in claim 3 is characterized in that: described urea class stainless steel comprises:
Weight percent is no more than 0.02% C;
The Cr of weight percent between 24.0% to 26.0%;
The Ni of weight percent between 21.0% to 23.0%;
The Mo of weight percent between 2.0% to 2.5%;
The N of weight percent between 0.1% to 0.16%;
Weight percent is no more than 0.7% Si;
Weight percent is no more than 2.0% Mn;
Weight percent is no more than 0.025% P;
Weight percent is no more than 0.010% S;
And the Fe of surplus.
5, the manufacture method of the weldless steel tube of stating according to claim 4, it is characterized in that: described blank is carried out also having a materiology step before the acid pickling step first time, described materiology step comprises dimensional inspection, surperficial check, quality test, Chemical Composition check.
6, the manufacture method of weldless steel tube according to claim 5 is characterized in that: also have an inspection after construction step after the described finished product acid-washing step.
7, the manufacture method of weldless steel tube according to claim 6 is characterized in that: described inspection after construction comprises surface check, hydraulic pressure detection, eddy current test, UT (Ultrasonic Testing), intergranular corrosion test, grain fineness number test, tensile test, flaring test, flattening test, hardness test, analysis of carbon and sulfur.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910034541A CN101671773A (en) | 2009-09-17 | 2009-09-17 | Method for manufacturing seamless steel tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910034541A CN101671773A (en) | 2009-09-17 | 2009-09-17 | Method for manufacturing seamless steel tube |
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|---|---|
| CN101671773A true CN101671773A (en) | 2010-03-17 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102463270A (en) * | 2010-11-05 | 2012-05-23 | 苏州贝思特金属制品有限公司 | Manufacture method for seamless steel pipe |
| CN102465200A (en) * | 2010-11-05 | 2012-05-23 | 苏州贝思特金属制品有限公司 | Manufacture method for seamless steel tube |
| CN102463269A (en) * | 2010-11-05 | 2012-05-23 | 苏州贝思特金属制品有限公司 | Manufacture method for seamless steel tube |
| CN102620062A (en) * | 2012-03-21 | 2012-08-01 | 苏州贝思特金属制品有限公司 | Method for manufacturing low-carbon resisto seamless stainless steel tubes |
| CN102921752A (en) * | 2012-11-15 | 2013-02-13 | 河海大学常州校区 | Hydraulic pressure cold-drawing production technique of metal pipe, and complete device of hydraulic pressure cold-drawing production technique |
| CN103443318A (en) * | 2011-03-24 | 2013-12-11 | 新日铁住金株式会社 | Austenite system alloy pipe and manufacturing method thereof |
| CN103710643A (en) * | 2013-12-20 | 2014-04-09 | 安徽浙南精密管业有限公司 | Heat-resisting seamless stainless steel pipe for high-pressure boiler and manufacturing method thereof |
| CN103710715A (en) * | 2013-12-20 | 2014-04-09 | 安徽浙南精密管业有限公司 | Cold-drawing and cold-rolling mixed molding method of stainless steel seamless pipe |
| CN109207697A (en) * | 2018-11-23 | 2019-01-15 | 成都斯杰化工机械有限公司 | High manganese molybdenum stainless steel of Ultra-low carbon and preparation method thereof |
| CN110014052A (en) * | 2019-05-23 | 2019-07-16 | 无锡市前洲无缝钢管有限公司 | A kind of manufacturing process of chemical fertilizer seamless steel pipe |
| CN110280620A (en) * | 2019-05-24 | 2019-09-27 | 浙江中达特钢股份有限公司 | A kind of production technology of the clean pipe of semiconductor |
-
2009
- 2009-09-17 CN CN200910034541A patent/CN101671773A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102463270A (en) * | 2010-11-05 | 2012-05-23 | 苏州贝思特金属制品有限公司 | Manufacture method for seamless steel pipe |
| CN102465200A (en) * | 2010-11-05 | 2012-05-23 | 苏州贝思特金属制品有限公司 | Manufacture method for seamless steel tube |
| CN102463269A (en) * | 2010-11-05 | 2012-05-23 | 苏州贝思特金属制品有限公司 | Manufacture method for seamless steel tube |
| CN103443318A (en) * | 2011-03-24 | 2013-12-11 | 新日铁住金株式会社 | Austenite system alloy pipe and manufacturing method thereof |
| CN103443318B (en) * | 2011-03-24 | 2015-11-25 | 新日铁住金株式会社 | Austenite system alloy pipe and manufacture method thereof |
| CN102620062A (en) * | 2012-03-21 | 2012-08-01 | 苏州贝思特金属制品有限公司 | Method for manufacturing low-carbon resisto seamless stainless steel tubes |
| CN102921752A (en) * | 2012-11-15 | 2013-02-13 | 河海大学常州校区 | Hydraulic pressure cold-drawing production technique of metal pipe, and complete device of hydraulic pressure cold-drawing production technique |
| CN103710643A (en) * | 2013-12-20 | 2014-04-09 | 安徽浙南精密管业有限公司 | Heat-resisting seamless stainless steel pipe for high-pressure boiler and manufacturing method thereof |
| CN103710715A (en) * | 2013-12-20 | 2014-04-09 | 安徽浙南精密管业有限公司 | Cold-drawing and cold-rolling mixed molding method of stainless steel seamless pipe |
| CN109207697A (en) * | 2018-11-23 | 2019-01-15 | 成都斯杰化工机械有限公司 | High manganese molybdenum stainless steel of Ultra-low carbon and preparation method thereof |
| CN110014052A (en) * | 2019-05-23 | 2019-07-16 | 无锡市前洲无缝钢管有限公司 | A kind of manufacturing process of chemical fertilizer seamless steel pipe |
| CN110280620A (en) * | 2019-05-24 | 2019-09-27 | 浙江中达特钢股份有限公司 | A kind of production technology of the clean pipe of semiconductor |
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Application publication date: 20100317 |