CN117488310A - Manufacturing method of stainless steel seamless tube for salt manufacturing equipment - Google Patents
Manufacturing method of stainless steel seamless tube for salt manufacturing equipment Download PDFInfo
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- CN117488310A CN117488310A CN202311351086.8A CN202311351086A CN117488310A CN 117488310 A CN117488310 A CN 117488310A CN 202311351086 A CN202311351086 A CN 202311351086A CN 117488310 A CN117488310 A CN 117488310A
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- China
- Prior art keywords
- stainless steel
- controlled
- steel pipe
- pipe
- parts
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- 239000010935 stainless steel Substances 0.000 title claims abstract description 67
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 67
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 57
- 150000003839 salts Chemical class 0.000 title claims abstract description 34
- 238000005554 pickling Methods 0.000 claims abstract description 51
- 239000002253 acid Substances 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 15
- QKVWBAMZPUHCMO-UHFFFAOYSA-N 2-pyrazin-2-ylethanethiol Chemical compound SCCC1=CN=CC=N1 QKVWBAMZPUHCMO-UHFFFAOYSA-N 0.000 claims abstract description 11
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 claims abstract description 10
- QFVGCVZHAQQIMT-UHFFFAOYSA-L nickel(2+);prop-2-enoate Chemical compound [Ni+2].[O-]C(=O)C=C.[O-]C(=O)C=C QFVGCVZHAQQIMT-UHFFFAOYSA-L 0.000 claims abstract description 10
- 239000001509 sodium citrate Substances 0.000 claims abstract description 10
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims abstract description 10
- 239000000176 sodium gluconate Substances 0.000 claims abstract description 10
- 229940005574 sodium gluconate Drugs 0.000 claims abstract description 10
- 235000012207 sodium gluconate Nutrition 0.000 claims abstract description 10
- 238000002360 preparation method Methods 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 81
- 239000010959 steel Substances 0.000 claims description 81
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 36
- 238000010438 heat treatment Methods 0.000 claims description 36
- 238000005498 polishing Methods 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 18
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical compound OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 16
- 238000005406 washing Methods 0.000 claims description 15
- 230000007547 defect Effects 0.000 claims description 13
- 238000010622 cold drawing Methods 0.000 claims description 12
- 238000005097 cold rolling Methods 0.000 claims description 12
- 238000005868 electrolysis reaction Methods 0.000 claims description 12
- 238000000227 grinding Methods 0.000 claims description 12
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 10
- DDAQLPYLBPPPRV-UHFFFAOYSA-N [4-(hydroxymethyl)-2-oxo-1,3,2lambda5-dioxaphosphetan-2-yl] dihydrogen phosphate Chemical compound OCC1OP(=O)(OP(O)(O)=O)O1 DDAQLPYLBPPPRV-UHFFFAOYSA-N 0.000 claims description 8
- 208000032544 Cicatrix Diseases 0.000 claims description 6
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 6
- 229910052729 chemical element Inorganic materials 0.000 claims description 6
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 6
- 238000004821 distillation Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 231100000241 scar Toxicity 0.000 claims description 6
- 230000037387 scars Effects 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 6
- VPASWAQPISSKJP-UHFFFAOYSA-N ethyl prop-2-enoate;isocyanic acid Chemical compound N=C=O.CCOC(=O)C=C VPASWAQPISSKJP-UHFFFAOYSA-N 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 abstract description 31
- 238000005260 corrosion Methods 0.000 abstract description 31
- 239000000243 solution Substances 0.000 abstract description 24
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 abstract description 16
- 229910052751 metal Inorganic materials 0.000 abstract description 16
- 239000002184 metal Substances 0.000 abstract description 16
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 abstract description 15
- 239000012267 brine Substances 0.000 abstract description 13
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 abstract description 13
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 8
- 229910000147 aluminium phosphate Inorganic materials 0.000 abstract description 8
- 239000011651 chromium Substances 0.000 abstract description 8
- 229910052804 chromium Inorganic materials 0.000 abstract description 7
- 229910052750 molybdenum Inorganic materials 0.000 abstract description 6
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 6
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 abstract description 5
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 abstract description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 4
- 238000007259 addition reaction Methods 0.000 abstract description 4
- 238000013329 compounding Methods 0.000 abstract description 4
- -1 mercapto-propenyl Chemical group 0.000 abstract description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 3
- MQRWBMAEBQOWAF-UHFFFAOYSA-N acetic acid;nickel Chemical compound [Ni].CC(O)=O.CC(O)=O MQRWBMAEBQOWAF-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 3
- 239000001257 hydrogen Substances 0.000 abstract description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 3
- 239000003595 mist Substances 0.000 abstract description 3
- 229940078494 nickel acetate Drugs 0.000 abstract description 3
- 230000002195 synergetic effect Effects 0.000 abstract description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 abstract description 2
- 239000011733 molybdenum Substances 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 15
- 238000003466 welding Methods 0.000 description 13
- 238000001704 evaporation Methods 0.000 description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 9
- 239000010949 copper Substances 0.000 description 9
- 229910052799 carbon Inorganic materials 0.000 description 8
- 229910052802 copper Inorganic materials 0.000 description 7
- 229910000570 Cupronickel Inorganic materials 0.000 description 6
- 229910052759 nickel Inorganic materials 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 239000010936 titanium Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052684 Cerium Inorganic materials 0.000 description 4
- 229910000746 Structural steel Inorganic materials 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 229910052748 manganese Inorganic materials 0.000 description 4
- 238000002161 passivation Methods 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- 229920006337 unsaturated polyester resin Polymers 0.000 description 4
- 229910000975 Carbon steel Inorganic materials 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 3
- 239000010962 carbon steel Substances 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- WELLGRANCAVMDP-UHFFFAOYSA-N isocyanatoethane;prop-2-enoic acid Chemical compound CCN=C=O.OC(=O)C=C WELLGRANCAVMDP-UHFFFAOYSA-N 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- VOYADQIFGGIKAT-UHFFFAOYSA-N 1,3-dibutyl-4-hydroxy-2,6-dioxopyrimidine-5-carboximidamide Chemical compound CCCCn1c(O)c(C(N)=N)c(=O)n(CCCC)c1=O VOYADQIFGGIKAT-UHFFFAOYSA-N 0.000 description 1
- 235000013162 Cocos nucifera Nutrition 0.000 description 1
- 244000060011 Cocos nucifera Species 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
- C23G1/088—Iron or steel solutions containing organic acids
-
- 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
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
- C21D8/105—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/48—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
- C23C22/50—Treatment of iron or alloys based thereon
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
- C25F1/02—Pickling; Descaling
- C25F1/04—Pickling; Descaling in solution
- C25F1/06—Iron or steel
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention relates to the field of stainless steel tube preparation, in particular to a method for manufacturing a stainless steel seamless tube for salt production equipment; according to the invention, ethyl acrylate containing organic phosphoric acid/acetic acid is adopted to respectively react with 2- (2-mercaptoethyl) pyrazine and nickel acrylate through mercapto-propenyl addition reaction, and then sodium gluconate and sodium citrate are added for compounding to obtain pickling solution of organic phosphoric acid/nickel acetate complex, so that a layer of compact antirust film is generated on the surface of metal while rust on the surface of the metal is rapidly cleaned, the corrosion resistance of the metal after pickling is enhanced, and the problems of corrosion, acid mist, hydrogen embrittlement and pollution caused by strong acid such as hydrochloric acid, sulfuric acid and the like are solved under the synergistic effect; the stainless steel seamless pipe for the salt making equipment is manufactured by the invention, and based on common stainless steel, the chromium content is properly improved, and a proper amount of molybdenum and nitrogen are added so as to improve the corrosion resistance of the stainless steel in brine.
Description
Technical Field
The invention relates to the field of stainless steel tube preparation, in particular to a method for manufacturing a stainless steel seamless tube for salt production equipment.
Background
Typical components of brine for salt-making industry contain Na 2 SO 4 2-3g/L、MgSO 4 0.3-0.5g/L、CaCl 2 3-4g/L、MgCl 2 2.5-4.5g/L, naCl-380 g/L, and sulfate corrosion and chloride corrosion are caused to heating pipes, evaporating tanks, circulating pumps and other devices.
The brine has the characteristics of small radius of chloride ions, strong penetrating power and strong adsorption by the metal surface. The chloride ions will rob the positive ions in the passivation film on the surface of the metal component to destroy the stable passivation film formed on the surface of the metal component, and the metal copper, chromium, iron, nickel and titanium are not protected by the passivation film any more and are dissolved to form local pitting.
CN112808791a: relates to the field of stainless steel, in particular to a production process and application of a stainless steel seamless pipe. The production process of the stainless steel seamless pipe is characterized by comprising the following specific steps of: s1, polishing an outer circle; s2, cold rolling; s3, degreasing; s4, vacuum bright annealing; s5, straightening and cutting the pipe; s6, polishing the inner circle; s7, packaging and warehousing. The production process of the stainless steel seamless pipe provided by the invention has the following advantages: the process is simple and feasible, and the practicability is high; (2) The produced stainless steel seamless pipe is smooth and beautiful, and is not easy to bulge and crack; (3) The produced stainless steel seamless tube has high temperature resistance, high heat and humidity resistance and high stability.
CN113637395a: the corrosion-resistant seamless stainless steel pipe comprises a steel pipe body, wherein the surface of the steel pipe body is coated with a corrosion-resistant layer, and the corrosion-resistant layer comprises the following components in parts by weight: 30-40 parts of unsaturated polyester resin; 8-9 parts of liquid nitrile rubber; 10-12 parts of sodium cocopolyether sulfate; 1-2 parts of a catalyst; 2-3 parts of a trione phosphate; 1-2 parts of diatomite; 1-2 parts of zinc powder; the processing technology of the corrosion-resistant seamless stainless steel pipe comprises the steps of preparing a corrosion-resistant coating and coating a corrosion-resistant layer. The application has the following advantages and effects: mixing sodium cocoanut polyether sulfate with unsaturated polyester resin, reducing the viscosity of the unsaturated polyester resin, improving the curing efficiency, uniformly mixing and tightly stacking the unsaturated polyester resin and liquid nitrile rubber to form a compact structure, and isolating the damage of corrosive substances to the steel pipe; further addition of diatomaceous earth and metallic zinc powder may increase the corrosion resistance of the corrosion resistant layer.
CN116652527a: the invention discloses a preparation method of a corrosion-resistant stainless steel pipe, which relates to the field of stainless steel pipe preparation, and comprises the following steps of firstly, preparing a stainless steel plate, placing metallic iron into an electric arc furnace, melting to obtain blast furnace molten iron, placing an alloy into an intermediate frequency furnace to obtain an alloy solution, and pouring the blast furnace molten iron and the alloy solution into an AOD furnace through a ladle to obtain molten steel; the invention welds the pipe to be welded by adopting a plasma arc welding method, the paste prepared by chalk powder is coated in the range of 50mm on both sides of the part to be welded, meanwhile, random arc striking on the surface of a stainless steel welding piece is forbidden, the welding width is 3mm, the local burn on the surface of the stainless steel pipe can be avoided, the paste prepared by the chalk powder is distributed on both sides of the welding part, the damage of metal splashes on the surface of the stainless steel pipe during welding can be avoided, the yield of the stainless steel pipe is improved, after the welding is finished, the arc pits are filled, the surface of the stainless steel pipe can be prevented from generating cracks, and the quality of the stainless steel pipe is improved.
The prior art and the above patents mostly adopt carbon structural steel, copper or cupronickel, common stainless steel, TA2 and TA10 to manufacture stainless steel seamless pipes, and have the following defects:
because the brine heating pipe, the evaporating pot and the circulating pump which are made of carbon structural steel are easy to produce perforation corrosion, the service life is shorter, the equipment depreciation cost is high in 12-18 months generally. In addition, the daily maintenance occupies long production time and has higher maintenance cost. The effective operation time is less than 6000 hours/year, and the production efficiency and the economic benefit of salt works are affected.
The brine heating pipe and the evaporating pot made of copper and cupronickel have longer service life than carbon structural steel, but the copper heating pipe and the evaporating pot are easy to be subjected to calculus and paste dirt, and frequent production stopping and brushing of the pipe and the pot are required, and the production time is reduced. In addition, the copper heating pipe and the evaporating pot are generally cleaned of gypsum scale by an acid-washing and alkali-boiling method, the surface roughness of the inner wall of the copper heating pipe and the inner wall of the evaporating pot is continuously increased, the corrosion resistance is obviously accelerated, perforation and rupture can occur after 2.5-3 years, and the equipment is scrapped and updated. As the price of the electrolytic copper of a large number of commodity products is continuously increased, the cost of the copper heating pipe and the evaporating pot is also continuously increased, the salt production cost is increased, and the cost performance of salt production equipment is affected.
The service life of the brine heating pipe and the evaporating pot made of common stainless steel (such as 0Cr18Ni9Ti and S31603) is longer than that of carbon structural steel, generally 2-3 years, but the evaporating pot has high requirements on stainless steel welding, requires grooving and butt welding, requires multi-layer welding, requires cleaning welding slag, slag inclusion, splashing and the like, requires heat treatment after welding to eliminate processing stress and welding stress, and has high equipment welding cost. In addition, fe in brine 2+ And Fe (Fe) 3+ The concentration is continuously increased, the stability of a common stainless steel passivation film can be reduced, the corrosion speed is accelerated, the equipment needs to be replaced for 2-3 years, and the equipment use cost is high.
The brine heating pipe and the evaporating pot manufactured by TA2 and TA10 have very good corrosion resistance, the service life is longer than that of white copper and stainless steel and can reach 10 years, but TA2 and TA10 are very expensive, and the price per ton is more than 20 ten thousand yuan, so that the equipment cost of the heating pipe and the evaporating pot manufactured by pure titanium is high, the equipment depreciation is very high, and the salt manufacturing industrial economic benefit index is not facilitated.
The most common pickling technology used at present mainly comprises inorganic acid with strong oxidability such as hydrochloric acid, sulfuric acid, nitric acid and the like, and has large pollution and large harm to human bodies.
In view of the above, it is necessary to develop a novel acid-washing process with organic acid as the main component and low acidity, instead of the inorganic acid-washing process with large pollution.
Disclosure of Invention
The invention aims to provide a manufacturing method of a stainless steel seamless pipe for salt manufacturing equipment, which adopts ethyl acrylate containing organic phosphoric acid/acetic acid to respectively react with 2- (2-mercaptoethyl) pyrazine, nickel acrylate is subjected to mercapto-propenyl addition reaction, and then sodium gluconate and sodium citrate are added for compounding to obtain pickling solution of an organic phosphoric acid/nickel acetate complex, so that a layer of compact antirust film is formed on the surface of metal while rust on the surface of the metal is quickly cleaned, the corrosion resistance of the metal after pickling is enhanced, and the problems of corrosion, acid mist, hydrogen embrittlement and pollution caused by strong acid such as hydrochloric acid, sulfuric acid and the like are solved under the synergistic effect.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a manufacturing method of stainless steel seamless tube for salt manufacturing equipment comprises the following chemical element components:
0.01-0.03% of C,0.4-0.8% of Si,0.5-1% of Mn,0.01-0.03% of P,0.01-0.02% of S,20.8-23.2% of Cr,4.5-6.5% of Ni,2.4-3.6% of Mo,0.1-0.22% of N,0.1-0.25% of Ce and the balance of Fe.
As a preferred embodiment, the manufacturing steps are as follows: peeling, hot perforating, pickling, polishing, cold rolling, cold drawing and heat treatment are carried out on the steel pipe.
As a preferred embodiment, the peeled front surface of the steel pipe is free from cracks, scars, folds and inclusions, and the surface finish of the peeled steel pipe is controlled to be 1-2.5 mu m.
As a preferred embodiment, the heating speed of the thermal perforation is slow below 800 ℃, and the heating speed is controlled between 100 ℃ and 120 ℃ per hour; the temperature is rapidly raised from 800 ℃ to 1100 ℃ and the temperature raising speed is controlled to be 200-250 ℃/h.
As a preferred embodiment, the pickling operation steps are as follows:
s1, electrolysis: placing the steel pipe in H with the concentration of 230-350g/L 2 SO 4 The acid tank is electrolyzed, and the current density is controlled to be 2900-4000A/m 2 The electrolysis temperature is controlled between 65 ℃ and 98 ℃;
s2, acid washing: soaking the steel pipe in an organic pickling solution at the pickling temperature of 20-30 ℃ for 20-40min;
s3: immediately hanging the pickled steel pipe into a clean water cylinder, and shaking up and down to shake off oxide skin on the surface of the steel pipe; the steel pipe is lifted out of the clean water tank, and the outer wall of the inner wall of the steel pipe is repeatedly washed by high-pressure water, so that no residual acid, no residual oil and no residual oxide skin are generated on the outer wall of the inner wall of the steel pipe;
s4: and (5) drying the water of the steel pipe after pickling and water washing by using a high-pressure fan.
As a preferred embodiment, the defect of the outer wall of the steel pipe is polished by an outer wall polisher, and the defect of the inner wall is polished by an inner wall polisher; the granularity of the rough polishing grinding wheel is 60 meshes, and the granularity of the fine polishing grinding wheel is 120 meshes.
As a preferable implementation mode, the deformation of the first pass is controlled to be 40-50%, the intermediate pass is controlled to be 50-60%, and the finished product pass is controlled to be 40-50%; the cold drawing is that the deformation of the first pass is controlled to be 30-35%, the intermediate pass is controlled to be 40-50%, and the finished product pass is controlled to be 30-35%.
As a preferred embodiment, the heat treatment temperature is 1050-1100 ℃.
As a preferred embodiment, the organic pickling solution is prepared by the following steps:
s1: 200-400 parts of isocyanate ethyl acrylate, 220-440 parts of hydroxyethylidene diphosphate, 76-150 parts of glycolic acid, 2-5 parts of dibutyl tin dilaurate, 500-800 parts of methanol and stirring at 60-80 ℃ for 50-90min according to parts by weight; removing methanol by distillation;
s2: then adding 20-40 parts of 2- (2-mercaptoethyl) pyrazine, 0.002-0.07 part of nickel acrylate, 500-800 parts of DMF and 2-5 parts of triethylamine, stirring for 50-100min at 50-70 ℃, adding 2-5 parts of sodium gluconate and 2-5 parts of sodium citrate, stirring for 10-30min at 40-50 ℃, and distilling to remove DMF to obtain the organic pickling solution.
Organic pickling solution reaction mechanism:
the isocyanate ethyl acrylate respectively carries out condensation reaction with hydroxyl groups of hydroxyethylidene diphosphate and glycolic acid to obtain ethyl acrylate containing organic phosphoric acid/acetic acid; ethyl acrylate containing organic phosphoric acid/acetic acid respectively reacts with 2- (2-mercaptoethyl) pyrazine and nickel acrylate through mercapto-propenyl addition reaction, and then sodium gluconate and sodium citrate are added for compounding to obtain the organic pickling solution.
The invention has the technical effects and advantages that:
1. the price of the stainless steel seamless pipe for the salt making equipment is lower than that of pure titanium TA2 and TA10, but the corrosion resistance of brine in salt making industry is close to that of pure titanium, and the service life is as long as more than 10 years;
2. the stainless steel seamless pipe for the salt making equipment has the price slightly higher than that of common stainless steel 0Cr18Ni9Ti, but the brine corrosion resistance of the salt making industry is greatly higher than that of the common stainless steel 0Cr18Ni9Ti, and the service life of the stainless steel seamless pipe is longer than 10 years and is far longer than that of the common stainless steel 0Cr18Ni9Ti by only 2-3 years;
3. the stainless steel seamless pipe for the salt making equipment manufactured by the invention has the brine corrosion resistance of the salt making industry which is greatly higher than that of carbon steel, copper and white copper, the service life of the stainless steel seamless pipe is longer than that of the stainless steel seamless pipe for the salt making equipment which is longer than that of the stainless steel seamless pipe for the carbon steel for 12-18 months, and the service lives of the stainless steel seamless pipe for the salt making equipment which is longer than that of the stainless steel seamless pipe for the carbon steel for 2.5-3 years; the service life is prolonged, and higher production efficiency and lower production cost are brought to salt manufacturing industry;
4. the stainless steel seamless pipe for the salt making equipment is prepared by properly improving the chromium content and adding a proper amount of molybdenum and nitrogen on the basis of common stainless steel 0Cr18Ni9Ti so as to improve the corrosion resistance of the novel stainless steel in brine; on the other hand, the nickel content of the stainless steel is properly reduced, so that the cost of the novel stainless steel is not much higher than that of the common stainless steel 0Cr18Ni9 Ti;
5. according to the invention, ethyl acrylate containing organic phosphoric acid/acetic acid is adopted to respectively react with 2- (2-mercaptoethyl) pyrazine and nickel acrylate through mercapto-propenyl addition reaction, and then sodium gluconate and sodium citrate are added for compounding to obtain the pickling solution of the organic phosphoric acid/nickel acetate complex, so that a layer of compact antirust film is generated on the surface of the metal while the rust on the surface of the metal is quickly cleaned, the corrosion resistance of the metal after pickling is enhanced, and the problems of corrosion, acid mist, hydrogen embrittlement and pollution caused by strong acid such as hydrochloric acid and sulfuric acid are solved through synergistic effect.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
1. Corrosion performance detection according to GB/T18590 (method for evaluating corrosion pitting corrosion of metals and alloys), brine components are Na2SO42.27g/L, mgSO40.35g/L, caCl23.36g/L, mgCl23.09g/L and NaCl308.6g/L, and the test temperature is 125 ℃, and the corrosion speeds of four metals are measured;
2. the potential of the critical point etching point is measured according to GB/T17899 stainless steel pitting potential measuring method.
Example 1
A manufacturing method of stainless steel seamless tube for salt manufacturing equipment comprises the following chemical element components:
0.01% C,0.4% Si,0.5% Mn,0.01% P,0.01% S,20.8% Cr,4.5% Ni,2.4% Mo,0.1% N,0.1% Ce, and the balance Fe.
The manufacturing steps are as follows: peeling, hot perforating, pickling, polishing, cold rolling, cold drawing and heat treatment are carried out on the steel pipe.
The surface of the peeled steel pipe has no cracks, scars, folds and inclusions, and the surface finish of the peeled steel pipe is controlled to be 1 mu m.
The heating rate of the thermal perforation is controlled to be 100 ℃/h, and the heating rate is controlled to be low below 800 ℃; the temperature is rapidly increased from 800 ℃ to 1100 ℃ and the temperature increasing speed is controlled at 200 ℃/h.
The pickling operation steps are as follows:
s1, electrolysis: placing the steel pipe at a concentration of 230g/L H 2 SO 4 Is electrolyzed in an acid tank, and the current density is controlled to be 2900A/m 2 The electrolysis temperature is controlled at 65 ℃;
s2, acid washing: soaking the steel pipe in an organic pickling solution at the pickling temperature of 20 ℃ for 20min;
s3: immediately hanging the pickled steel pipe into a clean water cylinder, and shaking up and down to shake off oxide skin on the surface of the steel pipe; the steel pipe is lifted out of the clean water tank, and the outer wall of the inner wall of the steel pipe is repeatedly washed by high-pressure water, so that no residual acid, no residual oil and no residual oxide skin are generated on the outer wall of the inner wall of the steel pipe;
s4: and (5) drying the water of the steel pipe after pickling and water washing by using a high-pressure fan.
The defects of the outer wall of the steel pipe are polished by an outer wall polishing machine, and the defects of the inner wall of the steel pipe are polished by an inner wall polishing machine; the granularity of the rough polishing grinding wheel is 60 meshes, and the granularity of the fine polishing grinding wheel is 120 meshes.
The cold rolling is that the deformation of the first pass is controlled to be 40%, the intermediate pass is controlled to be 50%, and the finished product pass is controlled to be 40%; the cold drawing is that the deformation of the first pass is controlled to be 30%, the intermediate pass is controlled to be 40%, and the finished product pass is controlled to be 30%.
The heat treatment temperature is 1050 ℃.
The preparation method of the organic pickling solution comprises the following steps:
s1: 200kg of ethyl isocyanate acrylate, 220kg of hydroxyethylidene diphosphate, 76kg of glycolic acid, 2kg of dibutyltin dilaurate, 500kg of methanol and stirring at 60 ℃ for 50min; removing methanol by distillation;
s2: then 20kg of 2- (2-mercaptoethyl) pyrazine, 0.002kg of nickel acrylate, 500kg of DMF,2kg of triethylamine are added, stirring is carried out for 50min at 50 ℃, then 2kg of sodium gluconate and 2kg of sodium citrate are added, stirring is carried out for 10min at 40 ℃, and DMF is distilled off, thus obtaining the organic pickling solution.
Example 2
A manufacturing method of stainless steel seamless tube for salt manufacturing equipment comprises the following chemical element components:
0.02% C,0.5% Si,0.6% Mn,0.02% P,0.015% S,21.5% Cr,5% Ni,2.8% Mo,0.15% N,0.15% Ce, and the balance Fe.
The manufacturing steps are as follows: peeling, hot perforating, pickling, polishing, cold rolling, cold drawing and heat treatment are carried out on the steel pipe.
The surface of the peeled steel pipe has no cracks, scars, folds and inclusions, and the surface finish of the peeled steel pipe is controlled to be 1.5 mu m.
The heating rate of the thermal perforation is controlled to be 105 ℃/h, and the heating rate is controlled to be lower than 800 ℃; the temperature is rapidly increased from 800 ℃ to 1100 ℃ and the heating speed is controlled at 220 ℃/h.
The pickling operation steps are as follows:
s1 electrolysis: placing the steel pipe at 235g/L H 2 SO 4 Is electrolyzed in an acid tank with current density controlled at 3200A/m 2 The electrolysis temperature is controlled at 70 ℃;
s2, acid washing: soaking the steel pipe in an organic pickling solution at the pickling temperature of 25 ℃ for 25min;
s3: immediately hanging the pickled steel pipe into a clean water cylinder, and shaking up and down to shake off oxide skin on the surface of the steel pipe; the steel pipe is lifted out of the clean water tank, and the outer wall of the inner wall of the steel pipe is repeatedly washed by high-pressure water, so that no residual acid, no residual oil and no residual oxide skin are generated on the outer wall of the inner wall of the steel pipe;
s4: and (5) drying the water of the steel pipe after pickling and water washing by using a high-pressure fan.
The defects of the outer wall of the steel pipe are polished by an outer wall polishing machine, and the defects of the inner wall of the steel pipe are polished by an inner wall polishing machine; the granularity of the rough polishing grinding wheel is 60 meshes, and the granularity of the fine polishing grinding wheel is 120 meshes.
The cold rolling is that the deformation of the first pass is controlled to be 45%, the intermediate pass is controlled to be 55%, and the finished product pass is controlled to be 45%; the cold drawing is that the deformation of the first pass is controlled to be 32%, the intermediate pass is controlled to be 45%, and the finished product pass is controlled to be 32%.
The heat treatment temperature is 1060 ℃.
The preparation method of the organic pickling solution comprises the following steps:
s1: 250kg of isocyanate ethyl acrylate, 280kg of hydroxyethylidene diphosphate, 90kg of glycolic acid, 3kg of dibutyltin dilaurate, 600kg of methanol and stirring at 65 ℃ for 60min; removing methanol by distillation;
s2: then 25kg of 2- (2-mercaptoethyl) pyrazine, 0.02kg of nickel acrylate, 600kg of DMF,3kg of triethylamine are added, stirring is carried out for 70min at 55 ℃, then 3kg of sodium gluconate and 3kg of sodium citrate are added, stirring is carried out for 15min at 45 ℃, and DMF is distilled off, thus obtaining the organic pickling solution.
Example 3
A manufacturing method of stainless steel seamless tube for salt manufacturing equipment comprises the following chemical element components:
0.02% C,0.7% Si,0.8% Mn,0.02% P,0.015% S,21% Cr,6% Ni,3.2% Mo,0.2% N,0.2% Ce, and the balance Fe.
The manufacturing steps are as follows: peeling, hot perforating, pickling, polishing, cold rolling, cold drawing and heat treatment are carried out on the steel pipe.
The surface of the peeled steel pipe has no cracks, scars, folds and inclusions, and the surface finish of the peeled steel pipe is controlled to be 2 mu m.
The heating rate of the thermal perforation is controlled to be 115 ℃/h, and the heating rate is controlled to be lower than 800 ℃; the temperature is rapidly raised from 800 ℃ to 1100 ℃ and the temperature raising speed is controlled to 240 ℃/h.
The pickling operation steps are as follows:
s1, electrolysis: placing the steel pipe in H with the concentration of 320g/L 2 SO 4 Is electrolyzed in an acid tank, and the current density is controlled to be 3600A/m 2 The electrolysis temperature is controlled at 90 ℃;
s2, acid washing: soaking the steel pipe in an organic pickling solution at the pickling temperature of 25 ℃ for 35min;
s3: immediately hanging the pickled steel pipe into a clean water cylinder, and shaking up and down to shake off oxide skin on the surface of the steel pipe; the steel pipe is lifted out of the clean water tank, and the outer wall of the inner wall of the steel pipe is repeatedly washed by high-pressure water, so that no residual acid, no residual oil and no residual oxide skin are generated on the outer wall of the inner wall of the steel pipe;
s4: and (5) drying the water of the steel pipe after pickling and water washing by using a high-pressure fan.
The defects of the outer wall of the steel pipe are polished by an outer wall polishing machine, and the defects of the inner wall of the steel pipe are polished by an inner wall polishing machine; the granularity of the rough polishing grinding wheel is 60 meshes, and the granularity of the fine polishing grinding wheel is 120 meshes.
The cold rolling is that the deformation of the first pass is controlled to be 45%, the intermediate pass is controlled to be 55%, and the finished product pass is controlled to be 45%; the cold drawing is that the deformation of the first pass is controlled to 34%, the intermediate pass is controlled to 45%, and the finished product pass is controlled to 34%.
The heat treatment temperature is 1090 ℃.
The preparation method of the organic pickling solution comprises the following steps:
s1: 350kg of ethyl isocyanate acrylate, 400kg of hydroxyethylidene diphosphate, 130kg of glycolic acid, 4kg of dibutyltin dilaurate, 700kg of methanol and stirring at 75℃for 80min; removing methanol by distillation;
s2: then 35kg of 2- (2-mercaptoethyl) pyrazine, 0.05kg of nickel acrylate, 700kg of DMF and 4kg of triethylamine are added, the mixture is stirred at 65 ℃ for 90min, then 4kg of sodium gluconate and 4kg of sodium citrate are added, the mixture is stirred at 45 ℃ for 25min, and DMF is distilled off to obtain the organic pickling solution.
Example 4
A manufacturing method of stainless steel seamless tube for salt manufacturing equipment comprises the following chemical element components:
0.03% C,0.8% Si,1% Mn,0.03% P,0.02% S,23.2% Cr,6.5% Ni,3.6% Mo,0.22% N,0.25% Ce, and the balance Fe.
The manufacturing steps are as follows: peeling, hot perforating, pickling, polishing, cold rolling, cold drawing and heat treatment are carried out on the steel pipe.
The surface of the peeled steel pipe has no cracks, scars, folds and inclusions, and the surface finish of the peeled steel pipe is controlled to be 2.5 mu m.
The heating rate of the thermal perforation is controlled to be 120 ℃/h, and the heating rate is controlled to be lower than 800 ℃; the temperature is rapidly raised from 800 ℃ to 1100 ℃ and the temperature raising speed is controlled at 250 ℃/h.
The pickling operation steps are as follows:
s1, electrolysis: placing the steel pipe in H with the concentration of 350g/L 2 SO 4 Is electrolyzed in an acid tank with current density controlled at 4000A/m 2 The electrolysis temperature is controlled at 98 ℃;
s2, acid washing: soaking the steel pipe in an organic pickling solution at the pickling temperature of 30 ℃ for 40min;
s3: immediately hanging the pickled steel pipe into a clean water cylinder, and shaking up and down to shake off oxide skin on the surface of the steel pipe; the steel pipe is lifted out of the clean water tank, and the outer wall of the inner wall of the steel pipe is repeatedly washed by high-pressure water, so that no residual acid, no residual oil and no residual oxide skin are generated on the outer wall of the inner wall of the steel pipe;
s4: and (5) drying the water of the steel pipe after pickling and water washing by using a high-pressure fan.
The defects of the outer wall of the steel pipe are polished by an outer wall polishing machine, and the defects of the inner wall of the steel pipe are polished by an inner wall polishing machine; the granularity of the rough polishing grinding wheel is 60 meshes, and the granularity of the fine polishing grinding wheel is 120 meshes.
The cold rolling is that the deformation of the first pass is controlled to be 50%, the intermediate pass is controlled to be 60%, and the finished product pass is controlled to be 50%; the cold drawing is that the deformation of the first pass is controlled to be 35%, the intermediate pass is controlled to be 50%, and the finished product pass is controlled to be 35%.
The heat treatment temperature is 1100 ℃.
The preparation method of the organic pickling solution comprises the following steps:
s1: 400kg of ethyl isocyanate acrylate, 440kg of hydroxyethylidene diphosphate, 150kg of glycolic acid, 5kg of dibutyltin dilaurate, 800kg of methanol and stirring at 80℃for 90min; removing methanol by distillation;
s2: then 40kg of 2- (2-mercaptoethyl) pyrazine, 0.07kg of nickel acrylate, 800kg of DMF,5kg of triethylamine are added, stirring is carried out for 100min at 70 ℃, then 5kg of sodium gluconate and 5kg of sodium citrate are added, stirring is carried out for 30min at 50 ℃, and DMF is distilled off, thus obtaining the organic pickling solution.
Comparative example 1
This example was conducted as in example 1 except that hydroxyethylidene diphosphate was not added.
Comparative example 2
This example was conducted as in example 1 except that glycolic acid was not added thereto.
Comparative example 3
This example was conducted as in example 1 except that 2- (2-mercaptoethyl) pyrazine was not added.
Through the data analysis of the above examples and comparative examples, the stainless steel seamless tube of the present invention can effectively improve the corrosion resistance, and the service life is longer than 10 years, even up to 15 years.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.
Claims (9)
1. A manufacturing method of stainless steel seamless tube for salt manufacturing equipment comprises the following chemical element components:
0.01-0.03% of C,0.4-0.8% of Si,0.5-1% of Mn,0.01-0.03% of P,0.01-0.02% of S,20.8-23.2% of Cr,4.5-6.5% of Ni,2.4-3.6% of Mo,0.1-0.22% of N,0.1-0.25% of Ce and the balance of Fe.
2. The method for manufacturing a stainless steel seamless pipe for a salt manufacturing apparatus according to claim 1, comprising the steps of: peeling, hot perforating, pickling, polishing, cold rolling, cold drawing and heat treatment of the steel pipe.
3. The method for manufacturing a stainless steel seamless pipe for a salt manufacturing apparatus according to claim 2, characterized by: the surface of the peeled steel pipe has no cracks, scars, folds and inclusions, and the surface finish of the peeled steel pipe is controlled to be 1-2.5 mu m.
4. The method for manufacturing a stainless steel seamless pipe for a salt manufacturing apparatus according to claim 2, characterized by: the heating rate of the thermal perforation is controlled to be 100-120 ℃/h, and the heating rate is controlled to be lower than 800 ℃; the temperature is rapidly raised from 800 ℃ to 1100 ℃ and the temperature raising speed is controlled to be 200-250 ℃/h.
5. The method for manufacturing a stainless steel seamless pipe for a salt manufacturing apparatus according to claim 2, characterized by: the pickling operation steps are as follows:
s1, electrolysis: placing the steel pipe in H with the concentration of 230-350g/L 2 SO 4 The acid tank is electrolyzed, and the current density is controlled to be 2900-4000A/m 2 The electrolysis temperature is controlled between 65 ℃ and 98 ℃;
s2, acid washing: soaking the steel pipe in an organic pickling solution at the pickling temperature of 20-30 ℃ for 20-40min;
s3: immediately hanging the pickled steel pipe into a clean water cylinder, and shaking up and down to shake off oxide skin on the surface of the steel pipe; the steel pipe is lifted out of the clean water tank, and the outer wall of the inner wall of the steel pipe is repeatedly washed by high-pressure water, so that no residual acid, no residual oil and no residual oxide skin are generated on the outer wall of the inner wall of the steel pipe;
s4: and (5) drying the water of the steel pipe after pickling and water washing by using a high-pressure fan.
6. The method for manufacturing a stainless steel seamless pipe for a salt manufacturing apparatus according to claim 2, characterized by: the defects of the outer wall of the steel pipe are polished by an outer wall polishing machine, and the defects of the inner wall of the steel pipe are polished by an inner wall polishing machine; the granularity of the rough polishing grinding wheel is 60 meshes, and the granularity of the fine polishing grinding wheel is 120 meshes.
7. The method for manufacturing a stainless steel seamless pipe for a salt manufacturing apparatus according to claim 2, characterized by: the cold rolling is that the deformation of the first pass is controlled to be 40-50%, the intermediate pass is controlled to be 50-60%, and the finished product pass is controlled to be 40-50%; the cold drawing is that the deformation of the first pass is controlled to be 30-35%, the intermediate pass is controlled to be 40-50%, and the finished product pass is controlled to be 30-35%.
8. The method for manufacturing a stainless steel seamless pipe for a salt manufacturing apparatus according to claim 2, characterized by: the heat treatment temperature is 1050-1100 ℃.
9. The method for manufacturing a stainless steel seamless pipe for a salt manufacturing apparatus according to claim 5, wherein: the preparation method of the organic pickling solution comprises the following steps:
s1: 200-400 parts of isocyanate ethyl acrylate, 220-440 parts of hydroxyethylidene diphosphate, 76-150 parts of glycolic acid, 2-5 parts of dibutyl tin dilaurate, 500-800 parts of methanol and stirring at 60-80 ℃ for 50-90min according to parts by weight; removing methanol by distillation;
s2: then adding 20-40 parts of 2- (2-mercaptoethyl) pyrazine, 0.002-0.07 part of nickel acrylate, 500-800 parts of DMF and 2-5 parts of triethylamine, stirring for 50-100min at 50-70 ℃, adding 2-5 parts of sodium gluconate and 2-5 parts of sodium citrate, stirring for 10-30min at 40-50 ℃, and distilling to remove DMF to obtain the organic pickling solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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