CN108754347A - The manufacturing process of petrochemical equipment Anti-corrosion flange - Google Patents

The manufacturing process of petrochemical equipment Anti-corrosion flange Download PDF

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Publication number
CN108754347A
CN108754347A CN201810688968.6A CN201810688968A CN108754347A CN 108754347 A CN108754347 A CN 108754347A CN 201810688968 A CN201810688968 A CN 201810688968A CN 108754347 A CN108754347 A CN 108754347A
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China
Prior art keywords
forging
flange
corrosion
metal coating
resistant metal
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CN201810688968.6A
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Chinese (zh)
Inventor
张伟
沈忠协
孙天宇
吕澎沸
范红富
缪晨
缪一晨
吴斌
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JIANGYIN HENGRUN HEAVY INDUSTRY Co Ltd
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JIANGYIN HENGRUN HEAVY INDUSTRY Co Ltd
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Priority to CN201810688968.6A priority Critical patent/CN108754347A/en
Publication of CN108754347A publication Critical patent/CN108754347A/en
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    • 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
    • C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
    • 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
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • 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
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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
    • C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • 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
    • 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
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • 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
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • 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
    • C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
    • 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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06—Metallic material
    • 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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/134—Plasma spraying

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Heat Treatment Of Steel (AREA)
  • Coating By Spraying Or Casting (AREA)

Abstract

The present invention provides a kind of manufacturing process of petrochemical equipment Anti-corrosion flange, includes the following steps：Raw material steel ingot is obtained, chemical composition and weight percent are：C：0.10%-0.20%, Cr：12.0%-16.0%, Ni：2.12-2.15%,Mn：21.0%-25.0%, Cu：0.50%-1.00%, N：0.10%-0.20%, Si：1.00%-2.00%, A1：1.00-2.00%, V：0.06-0.08%, P≤0.035%, S≤0.02%, Re：0.03%-0.10%, surplus are Fe and not removable impurity；In the formation corrosion resistant metal coating of flange surface plasma spraying；One layer of polyurethane finish is smeared in corrosion resistant metal coating surface, in one layer of nano-solution of the polyurethane finish surface smear.

Description

The manufacturing process of petrochemical equipment Anti-corrosion flange
Technical field
The present invention relates to a kind of manufacturing process of petrochemical equipment Anti-corrosion flange.
Background technology
The flange of petrochemical equipment needs to have stronger corrosion resistance, and the early stage former Soviet Union has studied α（Ferritic phase） And γ（Austenite phase）Influence of the two-phase proportion to process plastic under high temperature has important influence：Ferrite is body-centered cubic knot Structure, austenite are face-centred cubic structure, and the deformation mechanism of two-phase is variant when high temperature, so as to cause the thermoplasticity of two phase stainless steel It is not fine.Research shows that when α phases or γ phase amounts are more than 20 ~ 25%, the plasticity of steel reduces, and when hot forging easy tos produce crackle Defect.So in order to have enough plasticity when ensureing hot forging, under hot processing temperature, it is necessary to assure the austenite number of phases in tissue Amount is no more than 8 ~ 10%, and 25 ~ 30% are not higher than in thermal deformation final temperature austenite phase quantity.Final forging temperature is unsuitable too low, if low In 950 DEG C, has the equal intermetallic phase of harmful σ and be easy to be precipitated in intergranular, material strips is given to carry out brittle risk.
In addition as society is growing day by day to the demand of Austriaization body stainless steel, people are to containing Ni Austria body stainless steel more It is preference；But the earth is limited for the nickel resources for manufacturing Austriaization body stainless steel, while nickel resources belong to strategic material, so Each state of our times is all developing section nickel Austria body stainless steel, to meet the needs of social development.
Invention content
It is an object of the invention to overcome defect existing in the prior art, provide a kind of high for sea water desalting equipment The manufacturing process of performance two-phase stainless steel flange, not only has good corrosion resistance, but also greatly reduce cost, Er Qieyan The service life of flange is grown.
To achieve the above object, it is double with high-performance for sea water desalting equipment that the technical solution of the present invention is to provide a kind of The manufacturing process of phase steel flange, includes the following steps：
S1, raw material steel ingot is obtained, chemical composition and weight percent are：C ：0.10% -0.20%, Cr：12.0%- 16.0%, Ni：2 .12 -2 .15%,Mn ：21.0% -25.0%, Cu：0.50% -1.00%, N：0.10% -0.20%, Si ：1.00% -2.00%, A1：1.00-2.00%, V：0 .06-0 .08%, P≤0.035%, S≤0.02%, Re： 0.03% -0.10%, surplus is Fe and not removable impurity, and is tested, it is ensured that in critical field；
S2, it steel ingot will be obtained will send to heating furnace to heat, and cut riser and mouth of a river end later, riser segments cut 15-20%, water Mouth end cuts 6-8%；
S3, blank is sent to heating furnace forge preceding heating, ensure initial forging temperature and terminal temperature in 1000-1200 DEG C of range It is interior；
S4, send to forging process carry out it is preforming and eventually forming fetal membrane forging；
S5, the two phase stainless steel steel after forging is quickly cooled down, is cooled to 120-130 DEG C with the speed of 17-19 DEG C/s, so After be air-cooled to room temperature；
S6, by rapid cooling, treated that forging carries out solution treatment again, and solid solution temperature is at 1020-1100 DEG C；
S7, by the forging after heat treatment by machining, obtain flange；
S8, the inspection that forging is carried out to corrosion resistance inspection, mechanical properties test, flaw detection, metallographic structure and grain size；
S9, the formation corrosion resistant metal coating that plasma spraying is carried out in flange surface, its chemistry of the corrosion resistant metal coating Ingredient and weight percent are：C：0 .06-0 .08%, Mn：0 .15-0 .18%, Cr：10 .76-10 .79%, Ni：2 .12-2 .15%, Mg：0 .13-0 .15%, Mo：0 .21-0 .23%, Co：0 .25-0 .27%, V：0 .06-0 .08%, Ti：0 .42-0 .44%, Na：0 .22-0 .25%, Ga：0 .17-0 .19%, Ce：0 .22- 0 .25%, Nd：0 .16-0 .18%, La：0 .32-0 .38%, surplus Fe；
S10：One layer of polyurethane finish is smeared in corrosion resistant metal coating surface, is received for one layer in the polyurethane finish surface smear Rice solution, its chemical composition of the nano-solution and weight percent are：21% antimony doped stannum oxide nano-crystal, 14% receives Rice titanium dioxide, 11% nanometer silicon carbide, surplus are organic fluorine waterproof agent；
S11, simulation working condition measurement, verify the reliability of product；
S12, workpiece packaging and storage.
It is further improved to be：The plasma spray coating process is：20-25V of voltage, 150-200A of electric current, 100-120mm of spray distance sprays 60~90 ° of direction, 200-300mm/s of sweep speed.
The advantages of the present invention are：Present invention employs the low Ni of high Cr, greatly reduce the usage amount of Ni, Production cost is greatly reduced, and chromium is to have decisive significance to the rustless property and corrosion resistance of steel, as no nickel Austria body is stainless The raising of the increase of chromium content in steel, the local corrosions ability such as anticorrosion stress-resistant, spot corrosion, crevice corrosion all has a major impact, this Outside by increasing V, can stable austenite phase, improve quenching degree, reduce and ductile-brittle transition temperature and morphotropism can be improved Can, it is even more in addition to spray one layer of corrosion resistant metal coating to protect flange in flange surface, further improves its corrosion resistant Corrosion energy, and metal coating usage amount is small, will not increase the production cost of flange, additionally by polyurethane finish, with envelope The micropore inside metal coating is closed, the nano-solution on finishing coat surface substantially increases wear resistance, and extend flange uses the longevity Life.
Specific implementation mode
With reference to embodiment, the specific embodiment of the present invention is further described.Following embodiment is only used for more Add and clearly demonstrate technical scheme of the present invention, and not intended to limit the protection scope of the present invention.
A kind of manufacturing process of petrochemical equipment Anti-corrosion flange, includes the following steps：
Include the following steps：
S1, raw material steel ingot is obtained, chemical composition and weight percent are：C ：0.10% -0.20%, Cr：12.0%- 16.0%, Ni：2 .12 -2 .15%,Mn ：21.0% -25.0%, Cu：0.50% -1.00%, N：0.10% -0.20%, Si ：1.00% -2.00%, A1：1.00-2.00%, V：0 .06-0 .08%, P≤0.035%, S≤0.02%, Re： 0.03% -0.10%, surplus is Fe and not removable impurity, and is tested, it is ensured that in critical field；
S2, it steel ingot will be obtained will send to heating furnace to heat, and cut riser and mouth of a river end later, riser segments cut 15-20%, water Mouth end cuts 6-8%；
S3, blank is sent to heating furnace forge preceding heating, ensure initial forging temperature and terminal temperature in 1000-1200 DEG C of range It is interior；
S4, send to forging process carry out it is preforming and eventually forming fetal membrane forging；
S5, the two phase stainless steel steel after forging is quickly cooled down, is cooled to 120-130 DEG C with the speed of 17-19 DEG C/s, so After be air-cooled to room temperature；
S6, by rapid cooling, treated that forging carries out solution treatment again, and solid solution temperature is at 1020-1100 DEG C；
S7, by the forging after heat treatment by machining, obtain flange；
S8, the inspection that forging is carried out to corrosion resistance inspection, mechanical properties test, flaw detection, metallographic structure and grain size；
S9, the formation corrosion resistant metal coating that plasma spraying is carried out in flange surface, its chemistry of the corrosion resistant metal coating Ingredient and weight percent are：C：0 .06-0 .08%, Mn：0 .15-0 .18%, Cr：10 .76-10 .79%, Ni：2 .12-2 .15%, Mg：0 .13-0 .15%, Mo：0 .21-0 .23%, Co：0 .25-0 .27%, V：0 .06-0 .08%, Ti：0 .42-0 .44%, Na：0 .22-0 .25%, Ga：0 .17-0 .19%, Ce：0 .22- 0 .25%, Nd：0 .16-0 .18%, La：0 .32-0 .38%, surplus Fe；
S10：One layer of polyurethane finish is smeared in corrosion resistant metal coating surface, is received for one layer in the polyurethane finish surface smear Rice solution, its chemical composition of the nano-solution and weight percent are：21% antimony doped stannum oxide nano-crystal, 14% receives Rice titanium dioxide, 11% nanometer silicon carbide, surplus are organic fluorine waterproof agent；
S11, simulation working condition measurement, verify the reliability of product；
S12, workpiece packaging and storage.
Wherein, in the S3 steps, the control of initial forging temperature is particularly significant.Early stage, the former Soviet Union had studied α（Ferrite Phase）And γ（Austenite phase）Influence of the two-phase proportion to process plastic under high temperature has important influence：Ferrite is body-centered cubic Structure, austenite are face-centred cubic structure, and the deformation mechanism of two-phase is variant when high temperature, so as to cause the thermoplastic of two phase stainless steel Property is not fine.Research shows that when α phases or γ phase amounts are more than 20 ~ 25%, the plasticity of steel reduces, and when hot forging, which easy tos produce, to be split Line defect.So in order to have enough plasticity when ensureing hot forging, under hot processing temperature, it is necessary to assure austenite phase in tissue Quantity is no more than 8 ~ 10%, and 25 ~ 30% are not higher than in thermal deformation final temperature austenite phase quantity.Final forging temperature is unsuitable too low, if Less than 950 DEG C, has the equal intermetallic phase of harmful σ and be easy to be precipitated in intergranular, material strips is given to carry out brittle risk.
In the S4 steps, traditional flange fetal membrane forging process is once-forming, and shaping load is big, and forging forming is not Good, follow-up amount of machining is larger, and waste of material is serious.And for two phase stainless steel, intensity is higher at room temperature, compares austenite Stainless steel is cold worked that difficulty is big, and in order to reduce follow-up machining allowance, this is just needed using net nearly forming technology, i.e., by advance at The thinking of type+final shaping unit optimizes flange tradition forging and forming technology, in conjunction with two phase stainless steel steel thermoforming parameter, formulates rational Process route.Finite Element Simulation Software can be used, numerical simulation is carried out to forming process, continues to optimize related process parameters, until Forming is reasonable, meanwhile, decrease experimental manufacturing cost.
In the S5 steps, stainless steel forgings carry out fast cold treatment after forging, because in 850 ~ 900 DEG C or so Slow coolings When, the equal intermetallic phases of σ（Brittlement phase is hard and crisp）Intercrystalline precipitation can significantly reduce the plasticity and toughness of steel；Again due to its richness Containing chromium, thus often there is Cr depletion zone around it or reduce the intergranular corrosion resistance performance of steel due to itself precipitation. It requires to be quickly cooled down in order to avoid the precipitation of the equal intermetallic phases of σ, after two phase stainless steel solution treatment.
In the S6 steps, because S5 steps rapid cooling can cause in forging there are larger residual stress, in order to avoid The cracking of forging in follow-up machining process, needs to carry out solution treatment, eliminates stress；Restore forging part plasticity simultaneously, subtracts Small follow-up machining difficulty；Most importantly prevent intercrystalline corrosion.
In the S11 steps, shaped flange forging must carry out simulation use under the conditions of comparable with use environment, To verify the reliability of properties of product, and guidance is provided for the optimization of subsequent product performance improvement.
This item purpose advantages and beneficial effects are：The key technology of high-performance diphase stainless steel flange is hot forging process ginseng Several formulations, this is closely related with material at high temperature plastic deformation characteristic.Since intensity is higher, practical forging difficulty is larger, There is larger differences with austenitic stainless steel for hot-workability, poorer than austenitic stainless steel, and forging crack tendency is serious. By the rational hot forging process parameter of formulation and follow-up solid solution treatment process, the hot formability of material can be given full play to, and Forging does not crack during accomplishing forging and molding.Using two-part near-net-shape forging technology that is preforming and shaping eventually, reduce Material loss, reduces shaping load, forging is more easy to shape.For actual production importantly, 022Cr23Ni5Mo3N The low Ni of the high Cr of two phase stainless steel, the material cost compared with Cr-Ni austenitic stainless steels decline to a great extent；And relative to traditional There is 316L higher intensity, resistance to local corrosion to have higher corrosion resistance especially in neutral chloride environment.Closely Nervous trend is presented in a little years, the supply of world's nickel, and China is few nickel minerals big country again, largely depends on import, therefore two phase stainless steel Practical significance and economic implications of the popularization with bigger of flange forge piece.
Preferred embodiment is in the present embodiment, and the plasma spray coating process is：20-25V of voltage, electric current 150-200A, 100-120mm of spray distance spray 60~90 ° of direction, 200-300mm/s of sweep speed.
The basic principles and main features and its advantage of the present invention have been shown and described above, the technical staff of the industry answers The understanding, the present invention is not limited to the above embodiments, the original for only illustrating the present invention described in above-described embodiment and explanation Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements It all fall within the protetion scope of the claimed invention, the claimed scope of the invention is by appended claims and its equivalent circle It is fixed.

Claims (2)

1. a kind of manufacturing process of petrochemical equipment Anti-corrosion flange, it is characterised in that：Include the following steps：
S1, raw material steel ingot is obtained, chemical composition and weight percent are：C ：0.10% -0.20%, Cr：12.0%- 16.0%, Ni：2 .12 -2 .15%,Mn ：21.0% -25.0%, Cu：0.50% -1.00%, N：0.10% -0.20%, Si ：1.00% -2.00%, A1：1.00-2.00%, V：0 .06-0 .08%, P≤0.035%, S≤0.02%, Re： 0.03% -0.10%, surplus is Fe and not removable impurity, and is tested, it is ensured that in critical field；
S2, it steel ingot will be obtained will send to heating furnace to heat, and cut riser and mouth of a river end later, riser segments cut 15-20%, water Mouth end cuts 6-8%；
S3, blank is sent to heating furnace forge preceding heating, ensure initial forging temperature and terminal temperature in 1000-1200 DEG C of range It is interior；
S4, send to forging process carry out it is preforming and eventually forming fetal membrane forging；
S5, the two phase stainless steel steel after forging is quickly cooled down, is cooled to 120-130 DEG C with the speed of 17-19 DEG C/s, so After be air-cooled to room temperature；
S6, by rapid cooling, treated that forging carries out solution treatment again, and solid solution temperature is at 1020-1100 DEG C；
S7, by the forging after heat treatment by machining, obtain flange；
S8, the inspection that forging is carried out to corrosion resistance inspection, mechanical properties test, flaw detection, metallographic structure and grain size；
S9, the formation corrosion resistant metal coating that plasma spraying is carried out in flange surface, its chemistry of the corrosion resistant metal coating Ingredient and weight percent are：C：0 .06-0 .08%, Mn：0 .15-0 .18%, Cr：10 .76-10 .79%, Ni：2 .12-2 .15%, Mg：0 .13-0 .15%, Mo：0 .21-0 .23%, Co：0 .25-0 .27%, V：0 .06-0 .08%, Ti：0 .42-0 .44%, Na：0 .22-0 .25%, Ga：0 .17-0 .19%, Ce：0 .22- 0 .25%, Nd：0 .16-0 .18%, La：0 .32-0 .38%, surplus Fe；
S10：One layer of polyurethane finish is smeared in corrosion resistant metal coating surface, is received for one layer in the polyurethane finish surface smear Rice solution, its chemical composition of the nano-solution and weight percent are：21% antimony doped stannum oxide nano-crystal, 14% receives Rice titanium dioxide, 11% nanometer silicon carbide, surplus are organic fluorine waterproof agent；
S11, simulation working condition measurement, verify the reliability of product；
S12, workpiece packaging and storage.
2. the manufacturing process of petrochemical equipment Anti-corrosion flange as described in claim 1, it is characterised in that：The plasma spray Applying technique is：20-25V of voltage, 150-200A of electric current, 100-120mm of spray distance, spraying direction 60~ 90 °, 200-300mm/s of sweep speed.
CN201810688968.6A 2018-06-28 2018-06-28 The manufacturing process of petrochemical equipment Anti-corrosion flange Pending CN108754347A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111570226A (en) * 2020-06-08 2020-08-25 河南冰熊专用车辆制造有限公司 Surface anticorrosion treatment process for stainless steel plate
CN115849920A (en) * 2022-11-14 2023-03-28 有研稀土新材料股份有限公司 Rare earth steel continuous casting nozzle surface coating and preparation method thereof

Citations (4)

* Cited by examiner, † Cited by third party
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