CN102606810A - Manufacture method of low carbon nickel chrome molybdenum niobium alloy stainless steel seamless steel tube - Google Patents
Manufacture method of low carbon nickel chrome molybdenum niobium alloy stainless steel seamless steel tube Download PDFInfo
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- CN102606810A CN102606810A CN2012100756344A CN201210075634A CN102606810A CN 102606810 A CN102606810 A CN 102606810A CN 2012100756344 A CN2012100756344 A CN 2012100756344A CN 201210075634 A CN201210075634 A CN 201210075634A CN 102606810 A CN102606810 A CN 102606810A
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- niobium alloy
- nickel chrome
- chrome molybdenum
- alloy stainless
- molybdenum niobium
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- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 36
- 239000010935 stainless steel Substances 0.000 title claims abstract description 36
- 229910001257 Nb alloy Inorganic materials 0.000 title claims abstract description 34
- DTSBBUTWIOVIBV-UHFFFAOYSA-N molybdenum niobium Chemical compound [Nb].[Mo] DTSBBUTWIOVIBV-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title abstract description 13
- 229910000831 Steel Inorganic materials 0.000 title abstract description 10
- 239000010959 steel Substances 0.000 title abstract description 10
- VMWYVTOHEQQZHQ-UHFFFAOYSA-N methylidynenickel Chemical compound [Ni]#[C] VMWYVTOHEQQZHQ-UHFFFAOYSA-N 0.000 title abstract 4
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 238000010622 cold drawing Methods 0.000 claims abstract description 8
- 238000005097 cold rolling Methods 0.000 claims abstract description 8
- 238000005553 drilling Methods 0.000 claims abstract description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 66
- 229910052799 carbon Inorganic materials 0.000 claims description 37
- 229910052759 nickel Inorganic materials 0.000 claims description 33
- 238000005260 corrosion Methods 0.000 claims description 26
- 230000007797 corrosion Effects 0.000 claims description 24
- 238000005554 pickling Methods 0.000 claims description 21
- 239000000047 product Substances 0.000 claims description 14
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 10
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 9
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 9
- 238000012360 testing method Methods 0.000 claims description 9
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 8
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 8
- 239000004571 lime Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 235000014121 butter Nutrition 0.000 claims description 7
- 229910017604 nitric acid Inorganic materials 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000005864 Sulphur Substances 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 claims description 5
- 229910052758 niobium Inorganic materials 0.000 claims description 5
- 239000010955 niobium Substances 0.000 claims description 5
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 4
- 239000007795 chemical reaction product Substances 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 239000011733 molybdenum Substances 0.000 claims description 4
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims description 4
- 239000011574 phosphorus Substances 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 229910052717 sulfur Inorganic materials 0.000 claims description 4
- 239000011593 sulfur Substances 0.000 claims description 4
- 239000010936 titanium Substances 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims description 3
- 239000010941 cobalt Substances 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 239000011572 manganese Substances 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 239000002253 acid Substances 0.000 abstract description 8
- 238000005406 washing Methods 0.000 abstract 4
- 238000005520 cutting process Methods 0.000 abstract 2
- 239000006104 solid solution Substances 0.000 abstract 2
- 238000005299 abrasion Methods 0.000 abstract 1
- 230000001050 lubricating effect Effects 0.000 abstract 1
- 238000004806 packaging method and process Methods 0.000 abstract 1
- 238000005507 spraying Methods 0.000 abstract 1
- 238000005303 weighing Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- 229910001119 inconels 625 Inorganic materials 0.000 description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 150000007522 mineralic acids Chemical class 0.000 description 3
- 239000013535 sea water Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 description 1
- NGNBDVOYPDDBFK-UHFFFAOYSA-N 2-[2,4-di(pentan-2-yl)phenoxy]acetyl chloride Chemical compound CCCC(C)C1=CC=C(OCC(Cl)=O)C(C(C)CCC)=C1 NGNBDVOYPDDBFK-UHFFFAOYSA-N 0.000 description 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- 229910001339 C alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 206010070834 Sensitisation Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 235000012206 bottled water Nutrition 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 229910001026 inconel Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 150000004965 peroxy acids Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
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- 238000003756 stirring Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention discloses a manufacture method of a low carbon nickel chrome molybdenum niobium alloy stainless steel seamless steel tube, which is used for manufacturing the low carbon nickel chrome molybdenum niobium alloy stainless steel seamless steel tube and includes the following steps: (1) first conducting the central drilling hole process on blank and checking the process, (2) then conducting heat processing on the blank after the drilling hole process, (3) conducting acid washing on the blank finishing heat processing, (4) conducting grinding, lubricating, cold drawing and rolling, deoiling on the blank finishing acid washing, (5) judging whether a finished product is satisfied and conducting solid solution heat treatment, straightening, constant cutting and acid washing on the finished product on yes judgment, (6) conducting solid solution heat treatment, straightening, constant cutting and acid washing on the middle product on no judgment, and (7) finally conducting checking, character spraying, packaging, weighing and product delivery on finished products. The manufacture method improves surface abrasion resistance of the low carbon nickel chrome molybdenum niobium alloy stainless steel seamless steel tube, improves performance standard, reduces manufacture cost and is simple in working procedure.
Description
Technical field
The present invention relates to a kind of stainless-steel seamless pipe production method, be specifically related to a kind of low-carbon nickel chrome molybdenum niobium alloy stainless-steel seamless pipe production method.
Background technique
Stainless-steel seamless pipe is a kind of rectangular steel that hollow section, periphery do not have seam that have.It is the steel pipe of chemical etching property dielectric corrosions such as weak aggressive medium such as anti-air, steam, water and acid, alkali, salt.Claim the Stainless Acid Resistant Steel pipe again, along with the enforcement of China's policies of reform and opening to the outside world, national economy obtains to increase fast, and cities and towns dwelling house, public building and tourist facilities are built in a large number, and hot water service and domestic water supply have been proposed new requirement.Quality problem particularly, People more and more is paid attention to, and requires also to improve constantly.This tubing commonly used of Coating Steel Pipe, will step down from the stage of history under the influence of national relevant policies because of its susceptibility-to-corrosion gradually, and plastic tube, composite pipe and copper pipe have become the tubing commonly used of pipe-line system.But in many cases; Stainless Steel Tube more has superiority; Particularly the wall thickness thin-wall stainless steel that is merely 0.6～1.2mm is in drink water system, water heating system and water supply system that safety, health are put in the first place, has safe and reliable, hygienic environment-protecting, characteristics such as economic and practical.Being proved one of water supply system combination property tubing best, novel, energy-conservation and environment protection type by project practices at home and abroad, also is a kind of very competitive water-feeding pipes, will be to improving water quality, improving people's living standard and bring into play unrivaled effect.In the building water supply piping; The century-old brilliant history because Coating Steel Pipe has been through with; Various novel plastics pipe and composite pipe are developed rapidly; But various tubing also exist some shortcomings to some extent, far can not adapt to the needs and the requirement of country to potable water and relevant water quality of water supply piping fully.Therefore, relevant expert's prophesy: building water supply tubing finally will return to the epoch of metal tube.According to external application experience, assert that in metal tube thin-wall stainless steel is one of best tubing of combination property.
Various aggressive mediums all have good corrosion proof low-carbon nickel chrome molybdenum niobium alloy.Because Kohlenstoffgehalt is low and through overstabilization heat treatment, even still do not have the sensitization tendency in 50 hours later on 650-900 ℃ of soak.Supply of material state is the soft annealing attitude, and its application area comprises the wet corrosion environment, and has obtained to be applied to the authentication of-196～450 ℃ of temperature, pressure containers.Other has the high-temperature applications that is applicable to that performance adjusts slightly, and the stainless steel red fuming nitric acid (RFNA) has good corrosion resistance, low price, superior performance.Because low-carbon nickel chrome molybdenum niobium alloy has comprehensively and good comprehensive performances; In all trades and professions, obtained to use widely; This all makes traditional low-carbon nickel chrome molybdenum niobium alloy can't reach requirement; The making method of traditional seamless steel pipe is made low-carbon nickel chrome molybdenum niobium alloy, not only wastes resource, and complex procedures.
Summary of the invention
The object of the invention has solved that low-carbon nickel chrome molybdenum niobium alloy stainless-steel seamless pipe surface decay resistance improves, superior performance standard, reduced fabricating cost and operation is simple.
For solving the problems of the technologies described above; Technological scheme of the present invention is: a kind of low-carbon nickel chrome molybdenum niobium alloy stainless-steel seamless pipe production method; Be used to make low-carbon nickel chrome molybdenum niobium alloy stainless-steel seamless pipe; Said low-carbon nickel chrome molybdenum niobium alloy stainless-steel seamless pipe step of manufacturing comprise (1) at first blank carry out centre-drilling hole technology and check, (2) are necessary heat treatment after blank is holed then, pickling is carried out to accomplishing heat treated blank in (3); (4) then the good blank of pickling carries out reconditioning, lubricated, cold drawing and rolling, deoils; (5) judge whether to satisfy finished product, then carry out finished product solution heat treatment, aligning, Ding Qie and pickling in this way, (6) as be not then carry out centre article solution heat treatment, aligning, cut surely, pickling and repeating step (4); (7) end product is tested, and sprays word, packs, weighs and outbound.1100 ℃ ± 10 ℃ of the temperature of article solution heat treatment in the middle of said, 1080 ℃ ± 10 ℃ of the temperature of finished product solution heat treatment, the pickling solution composition in deoiling comprises nitric acid 12%-15% and hydrofluoric acid 1%-2%; Said low-carbon nickel chrome molybdenum niobium alloy stainless-steel seamless pipe comprises that nickel is 58%, chromium is that 20-23%, molybdenum are that 8%-10%, niobium are 3.15-4.15%, and iron is 5%, and aluminium is 0.4%; Titanium is 0.4%, and carbon is 0.1%, and manganese is 0.5%; Silicon is 0.5%, and cobalt is 1%, and phosphorus is 0.015%; Sulphur is 0.015%, said lubricated employing butter and lime, and proportioning is lime and butter 10:1.2-1.5.
In preferred embodiment of the present invention, said blank check comprises the check of size, surface, Chemical composition and mechanical property etc.
In preferred embodiment of the present invention, the scope of the rolling technological parameter amount of deformation of said cold drawing and rolling is 1.5%-1.6%.
In preferred embodiment of the present invention, said Checking of finished products comprises table inspection, hydraulic pressure, eddy current testing ET, ultrasonic flaw detection UT, intergranular corrosion, grain size, pull test, flaring test, flattening, hardness, analysis of carbon and sulfur.
A kind of low-carbon nickel chrome molybdenum niobium alloy stainless-steel seamless pipe production method of the present invention has solved that low-carbon nickel chrome molybdenum niobium alloy stainless-steel seamless pipe surface decay resistance improves, superior performance standard, has reduced fabricating cost and operation is simple.
Description of drawings
Fig. 1 is the structural representation of low-carbon nickel chrome molybdenum niobium alloy stainless-steel seamless pipe production method in the present invention's one preferred embodiment.
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.
Consult Fig. 1; This a kind of low-carbon nickel chrome molybdenum niobium alloy stainless-steel seamless pipe production method is used to make low-carbon nickel chrome molybdenum niobium alloy stainless-steel seamless pipe, said low-carbon nickel chrome molybdenum niobium alloy stainless-steel seamless pipe step of manufacturing comprise (1) at first blank carry out centre-drilling hole technology and the check; (2) necessary heat treatment after blank is holed then; (3) carry out pickling to accomplishing heat treated blank, (4) then the good blank of pickling are carried out reconditioning, lubricated, cold drawing and rolling, are deoiled, and (5) judge whether to satisfy finished product; Then carry out finished product solution heat treatment, aligning, Ding Qie and pickling in this way; (6) as be not then carry out centre article solution heat treatment, aligning, cut surely, pickling and repeating step (4), (7) end product is tested, and the spray word, packs, weighs and outbound.
In one embodiment; A kind of low-carbon nickel chrome molybdenum niobium alloy stainless-steel seamless pipe production method of the present invention is used to make low-carbon nickel chrome molybdenum niobium alloy stainless-steel seamless pipe, said low-carbon nickel chrome molybdenum niobium alloy stainless-steel seamless pipe step of manufacturing comprise (1) at first blank carry out centre-drilling hole technology and the check; (2) necessary heat treatment after blank is holed then; (3) carry out pickling to accomplishing heat treated blank, (4) then the good blank of pickling are carried out reconditioning, lubricated, cold drawing and rolling, are deoiled, and (5) judge whether to satisfy finished product; Then carry out finished product solution heat treatment, aligning, Ding Qie and pickling in this way; (6) as be not then carry out centre article solution heat treatment, aligning, cut surely, pickling and repeating step (4), (7) end product is tested, and the spray word, packs, weighs and outbound.Said low-carbon nickel chrome molybdenum niobium alloy stainless-steel seamless pipe comprises that nickel is 58%, chromium is that 20-23%, molybdenum are that 8%-10%, niobium are 3.15-4.15%, and iron is 5%, and aluminium is 0.4%, and titanium is 0.4%; Carbon is 0.1%, and manganese is 0.5%, and silicon is 0.5%; Cobalt is 1%, and phosphorus is 0.015%, and sulphur is 0.015%.
Further specify, said blank check comprises the check of size, surface, Chemical composition and mechanical property etc., and the composition that said blank carries out the pickling solution in the pickling comprises 12%-15% nitric acid and 5%-8% hydrofluoric acid; The thick scale of first pretreatment before carrying out pickling with nitric acid and hydrofluoric acid mixed acid, the time was controlled at 4.5-5 hour, and sour temperature control is between 20-30 ℃; Said lubricated employing butter and lime; Proportioning is lime and butter 10:1.2-1.5, the lime preparation: one-level electric furnace lime hydration is removed bits after 80-100 order steel sieve sieves; Deposition is anhydrated; Air dry to 8 becomes, (being that water content is 20%-40%), allocate in proportion with butter then and in stirrer, stir after again behind the thin up again gentle agitation do not get final product to there being the colloidal that oily ball exists.
Further specify; The scope of the rolling technological parameter amount of deformation of said cold drawing and rolling is 1.5%-1.6%; When deoiling, the cleaning of pipe be should guarantee, sulphur, phosphorus, lead and other low melting metal in heat treatment process, can not be contacted; Otherwise can damage the performance of material, should note removing such as dirts such as lubricant oil, fuel.Control time is at 30min, and proportioning nitric acid 12%-15%+ hydrofluoric acid 1%-2% plays the effect of deoiling enough fast and effectively and tube surface is not had the influence of turning white of any peracid.
Further specify, the sulphur content when solution heat treatment in the fuel is low more good more again, and the Sulpher content in the rock gas should be less than 0.1%, and sulfur in heavy oil content should be less than 0.5%, and adds thermal-flame and can not directly burn to pipe.1100 ℃ ± 10 ℃ of the temperature of middle article solution heat treatment; 1080 ℃ ± 10 ℃ of the temperature of finished product solution heat treatment; Relation between holding time and the seamless steel pipe wall thickness is (2-3) min/mm; For obtaining best corrosion resistance; The type of cooling adopts water quick cooling to cross its 650 ℃ of sensitizing temperatures, and the material of thin walled tube also can adopt quick air cooling, and the above purpose reaches desirable surperficial decay resistance and improves; The 1.1-1.2 that improves the superior performance standard doubly, said Checking of finished products comprises table inspection, hydraulic pressure, eddy current testing ET, ultrasonic flaw detection UT, intergranular corrosion, grain size, pull test, flaring test, flattening, hardness, analysis of carbon and sulfur.
Further specify again
Inconel?625?(UNS?N06625?/?W.Nr.2.4856)
The close trade mark
| GB/T | UNS | Trademark | JIS | W.Nr |
| NS336 | N06625 | Inconel625 | NCF625 | 2.4856 |
Factory's inner control chemical composition of Inconel 625:
The physical property of Inconel 625:
| Density | 8.4 g/cm 3 |
| Fusing point | 1290-1350℃ |
Inconel 625 is factory's inner control mechanical property at normal temperatures
| Alloy state | Tensile strength Rm N/mm 2 | Yield strength RP0.2 N/mm 2 | Specific elongation A5 % | Brinell hardness HB |
| Gu melt | 840-920 | 380-410 | 50-60 | ≤210 |
Inconel 625 alloys have following characteristic: 1, the various aggressive mediums to oxidation and reducing environment all have very outstanding anti-corrosion capacity; 2, the outstanding anti-pitting corrosion and the ability of crevice corrosion; And can not produce because the stress corrosion cracking that chloride causes; 3, outstanding inorganic acid resistance corrosion ability, like the mixed acid of nitric acid, phosphoric acid, sulfuric acid, hydrochloric acid and sulfuric acid and hydrochloric acid etc., 4, the ability of outstanding anti-various inorganic acid mixed solutions corrosion; When 5, temperature reaches 40 ℃; In the hydrochloric acid solution of various concentration, all can show good corrosion resisting property, 6, good processability and weldability, cracking sensitivity after the solderless; 7, have the manufacturing authentication of wall temperature, 8, meet the highest standard grade VII that the sour gas environment uses through the NACE of NACE standard authentication (MR-01-75) at-196～450 ℃ pressurized container.
The structure of Inconel 625: 625 is centroid cubic lattice structure.When after the time, also being converted into stable Ni3 (Nb, Ti) rhombic lattice phase mutually with unsettled quaternary with separating out carbon granule at about 650 ℃ of insulation long enoughs.Molybdenum after the solution strengthening in the nickel chromium triangle matrix, niobium composition will improve the mechanical property of material, but plasticity can decrease.
The corrosion resistance of Inconel 625: 625 alloys all show fabulous corrosion resistance in a lot of media.The performance that in chloride media, has outstanding anti-spot corrosion, crevice corrosion, intergranular corrosion and erosion.Have good inorganic acid resistance corrosivity,, in oxidation and reducing environment, also have performance alkaline-resisting and the organic acid corrosion simultaneously like nitric acid, phosphoric acid, sulfuric acid, hydrochloric acid etc.Effective resisting chloride ion penetration reducibility stress corrosion cracking.In seawater and industrial gas environment, produce corrosion hardly, seawater and salt solution had very high corrosion resistance, when high temperature too.Insensitivity in the welding process.In static state or circulation environment, all have anti-carbonization and oxidability, and anti-chloride gas attack.
Inconel 625 application area applications have: the low-carbon alloy 625 after the soft annealing is widely used in chemical-process industry, and corrosion resistance and high tenacity make it as thin structure member preferably.625 alloys can be applied to the occasion that contacts seawater and bear high mechanical stress.Typical field of application: 1, the parts of the organic chemistry flow process of chloride; Especially in the occasion of using the acid chloride catalyzer; 2, be used to make the digester and the bleaching occasion of pulp and paper industry; 3, the absorption tower in the flue gas desulphurization system, reheater, flue gas inlet baffle plate, fan (humidity), stirrer, guide plate and flue etc.; 4, be used to make equipment and the parts that are applied to the sour gas environment, 5, acetate and acetic anhydride reaction generator, 6, the condensation of sulfuric acid device.A kind of low-carbon nickel chrome molybdenum niobium alloy stainless-steel seamless pipe production method of the present invention has solved that low-carbon nickel chrome molybdenum niobium alloy stainless-steel seamless pipe surface decay resistance improves, superior performance standard, has reduced fabricating cost and operation is simple.
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, and 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 (5)
1. low-carbon nickel chrome molybdenum niobium alloy stainless-steel seamless pipe production method; Be used to make low-carbon nickel chrome molybdenum niobium alloy stainless-steel seamless pipe; It is characterized in that: said low-carbon nickel chrome molybdenum niobium alloy stainless-steel seamless pipe step of manufacturing comprise (1) at first blank carry out centre-drilling hole technology and check, (2) are necessary heat treatment after blank is holed then, pickling is carried out to accomplishing heat treated blank in (3); (4) then the good blank of pickling carries out reconditioning, lubricated, cold drawing and rolling, deoils; (5) judge whether to satisfy finished product, then carry out finished product solution heat treatment, aligning, Ding Qie and pickling in this way, (6) as be not then carry out centre article solution heat treatment, aligning, cut surely, pickling and repeating step (4); (7) end product is tested, and sprays word, packs, weighs and outbound.
2. 1100 ℃ ± 10 ℃ of the temperature of article solution heat treatment in the middle of said, 1080 ℃ ± 10 ℃ of the temperature of finished product solution heat treatment, the pickling solution composition in deoiling comprises nitric acid 12%-15% and hydrofluoric acid 1%-2%; Said low-carbon nickel chrome molybdenum niobium alloy stainless-steel seamless pipe comprises that nickel is 58%, chromium is that 20-23%, molybdenum are that 8%-10%, niobium are 3.15-4.15%, and iron is 5%, and aluminium is 0.4%; Titanium is 0.4%, and carbon is 0.1%, and manganese is 0.5%; Silicon is 0.5%, and cobalt is 1%, and phosphorus is 0.015%; Sulphur is 0.015%, said lubricated employing butter and lime, and proportioning is lime and butter 10:1.2-1.5.
3. low-carbon nickel chrome molybdenum niobium alloy stainless-steel seamless pipe production method according to claim 1 is characterized in that: said blank check comprises the check of size, surface, Chemical composition and mechanical property etc.
4. low-carbon nickel chrome molybdenum niobium alloy stainless-steel seamless pipe production method according to claim 1, it is characterized in that: the scope of the rolling technological parameter amount of deformation of said cold drawing and rolling is 1.5%-1.6%.
5. low-carbon nickel chrome molybdenum niobium alloy stainless-steel seamless pipe production method according to claim 1 is characterized in that: said Checking of finished products comprises table inspection, hydraulic pressure, eddy current testing ET, ultrasonic flaw detection UT, intergranular corrosion, grain size, pull test, flaring test, flattening, hardness, analysis of carbon and sulfur.
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| CN103215473A (en) * | 2013-04-12 | 2013-07-24 | 苏州贝思特金属制品有限公司 | Low-carbon nickel-chromium-molybdenum-niobium alloy stainless-steel seamless pipe |
| CN103272877A (en) * | 2013-05-23 | 2013-09-04 | 苏州贝思特金属制品有限公司 | Low-carbon inconel seamless tube |
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| CN103272877A (en) * | 2013-05-23 | 2013-09-04 | 苏州贝思特金属制品有限公司 | Low-carbon inconel seamless tube |
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