CN106964909B - The manufacturing method of steel pipe is covered in pre- repaired mouth cermet - Google Patents
The manufacturing method of steel pipe is covered in pre- repaired mouth cermet Download PDFInfo
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- CN106964909B CN106964909B CN201710172676.2A CN201710172676A CN106964909B CN 106964909 B CN106964909 B CN 106964909B CN 201710172676 A CN201710172676 A CN 201710172676A CN 106964909 B CN106964909 B CN 106964909B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 100
- 239000010959 steel Substances 0.000 title claims abstract description 100
- 239000011195 cermet Substances 0.000 title claims abstract description 53
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 238000003466 welding Methods 0.000 claims abstract description 64
- 239000000919 ceramic Substances 0.000 claims abstract description 35
- 239000010935 stainless steel Substances 0.000 claims abstract description 24
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 22
- 239000000956 alloy Substances 0.000 claims abstract description 19
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 17
- 230000001902 propagating effect Effects 0.000 claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 13
- 238000005253 cladding Methods 0.000 claims description 52
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 34
- 238000000576 coating method Methods 0.000 claims description 26
- 230000007704 transition Effects 0.000 claims description 25
- 239000011248 coating agent Substances 0.000 claims description 24
- 239000000843 powder Substances 0.000 claims description 20
- 229910052742 iron Inorganic materials 0.000 claims description 17
- 229910052593 corundum Inorganic materials 0.000 claims description 11
- 239000010431 corundum Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 230000006698 induction Effects 0.000 claims description 6
- 238000003754 machining Methods 0.000 claims description 6
- 229910000599 Cr alloy Inorganic materials 0.000 claims description 4
- 239000000788 chromium alloy Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 238000009996 mechanical pre-treatment Methods 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims description 2
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- 238000009987 spinning Methods 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 23
- 230000007797 corrosion Effects 0.000 abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 238000005192 partition Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 47
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 14
- 239000004593 Epoxy Substances 0.000 description 9
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 230000003628 erosive effect Effects 0.000 description 6
- 239000003832 thermite Substances 0.000 description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 5
- 229910052804 chromium Inorganic materials 0.000 description 5
- 239000011651 chromium Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229910052759 nickel Inorganic materials 0.000 description 5
- 210000002445 nipple Anatomy 0.000 description 5
- 239000003755 preservative agent Substances 0.000 description 5
- 230000002335 preservative effect Effects 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 239000006104 solid solution Substances 0.000 description 5
- 238000010923 batch production Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 229920006334 epoxy coating Polymers 0.000 description 3
- 239000011152 fibreglass Substances 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000000274 aluminium melt Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000003260 anti-sepsis Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000002601 radiography Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910003470 tongbaite Inorganic materials 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
- B23K31/027—Making tubes with soldering or welding
Abstract
The invention discloses a kind of using nickel-base alloy+two phase stainless steel in the pre- first partition built-up welding corrosion resistant alloy material of inner wall of steel tube end, then the manufacture of steel pipe for covering processing in self- propagating (SHS) cermet is carried out in steel pipe inner wall, the manufacturing method of steel pipe is covered in especially a kind of pre- repaired mouth cermet (DSHS)；Solves the pipeline welding technique bottleneck that steel pipe is covered in common metal ceramics using the steel pipe that this method manufactures, it is a kind of high temperature high voltage resistant with good welds performance, wear-resistant, corrosion-resistant, good antiscale property cermet steel pipe, the steel pipe is suitable for land or seabed high pressure return water pipeline, high temperature and pressure steam pipe interior requirement for anticorrosion, can greatly improve the online service life of steel pipeline.
Description
Technical field
The present invention relates to steel pipe internal corrosion prevention technology field, be it is a kind of using nickel-base alloy+two phase stainless steel in steel pipe
Then the pre- first partition built-up welding corrosion resistant alloy material of pipe end inner wall carries out covering place in self- propagating (SHS) cermet in steel pipe inner wall
The manufacture of steel pipe of reason, the interior manufacturing method for covering steel pipe of especially a kind of pre- repaired mouth cermet (DSHS)；Utilize this method
The steel pipe of manufacture solves the pipeline welding technique bottleneck that steel pipe is covered in common metal ceramics, is a kind of with good welds performance
High temperature high voltage resistant, cover steel pipe in wear-resistant, corrosion-resistant, good antiscale property cermet, it is high which is suitable for land or seabed
The interior requirement for anticorrosion for pushing back note sewage conduct, high temperature and pressure steam pipe, can greatly improve the online service life of steel pipeline；
Background technique
In corrosive medium pipeline, especially in the conveying of corrosive medium pressure piping, (such as land or seabed is high to be pushed back
Water filling) in, it needs to carry out anti-corrosion treatment to inner wall of the pipe, to improve pipeline life；It is directed to such pipeline in the past, mostly uses soft
Property epoxy ceramic liquid coating or epoxy powder solid coating carry out batch production preservative treatment in advance to steel pipe inner wall, pipeline weld
Preservative treatment is carried out by " internal joint patch vehicle " butt welding mouth inner wall when connecing construction, to realize the continuous purpose of pipeline internal corrosion layer；It is right
In " internal joint patch vehicle " unapproachable small-bore pipeline (the onshore oil field individual well re-injection waterpipe of such as less than Φ 159mm), generally
Without preservative treatment in batch production, be full of the return water of corrosive medium to the corrosion of inner wall of the pipe and its serious, it is general this
It is scrapped because of corrosion within class pipeline most fast 2 years, causes serious economic loss, bring serious safety and environmental protection risk；
The domestic seabed high pressure re-injection waterpipe for being greater than Φ 159mm for outer diameter at present, mostly uses flexible epoxy ceramics to apply
Material carries out preservative treatment in batch production, and common weld bond inner wall is used using " internal joint patch vehicle " interior corrosion-resistanting interpolating port processing, special joint
The connection of fiber glass epoxy repaired mouth pipe nipple is as shown in (Fig. 1)；Although this method realizes the continuous purpose of interior erosion resistant coating, but construct
Complicated, higher cost, and limited by the anticorrosive paint ability of cohering, under the pressure medium of 10Mpa or more, the longevity of corrosion-inhibiting coating
Life can only be kept 2 years or so；
Chinese Patent Application No. 201621199624.1 discloses a kind of " inside and outside fusion bonded epoxy DGR composite steel tube ", the steel
Pipe has the function of outer diameter less than the onshore oil field high pressure re-injection waterpipe of Φ 159mm certain；The steel pipe is special using China
The stainless steel overlaying method of sharp application number 201610978737.X, in one layer of stainless steel layer of pipe end inner wall overlaying, in steel pipe inner wall
Using clinkery epoxy powder as inner anticorrosioning coating；External fusion bonded epoxy coating coheres ability higher than liquid preservative coating, and
Pipe end stainless steel weld overlays eliminate internal joint patch operation after pipeline welding, play the role of making interior erosion resistant coating continuously, but molten
Knot epoxy coating still cannot be resistant to the pressure medium of 12Mpa or more for a long time, generally can also fall off at 2 years or so；
Currently, the external compound inner coating having using the bottoming of flexible epoxy coating, fusion bonded epoxy phenolic powder coating capping
Method, the method increase the abilities of cohering of inner anticorrosioning coating, and media-resistant pressure is up to 20Mpa or more, but this method can not be right
Weld bond inner wall carries out above-mentioned compound internally coated corrosion-resistanting interpolating port operation, and corrosion-resistanting interpolating port layer becomes most weak link, shadow in weld bond
The bulk life time of pipeline is rung；
Coating technique is a kind of advanced technology in self- propagating (SHS) cermet, the self- propagating produced using the technology
(SHS) ceramic layer of cermet composite steel tube passes through transition zone and steel pipe inner wall metallurgical bonding, pressure-resistant and heat-resisting ability
Theoretically it is equal to steel pipe itself, corrosion resistance can exceed that 500 times of ordinary low-carbon steel or more, have outstanding wear resistance
Energy and scale-preventing performance, service life was up to 50 years or more, but the ceramic layer welding of the steel pipe is more difficult, can only use laser ceramics
Layer welding or ceramic sealing agent block the method for ceramic layer only weld metal layers such as shown in (Fig. 2), not can avoid sealing agent and are welding
The cracking of welded seam area ceramic layer caused by scaling loss and thermal weld stress in termination process；Due to blocking the presence of ceramic layer, make X
Ray can not leave a question open to the clear radiography in weld seam back, the reliability of weld seam；
Chinese Patent Application No. 201621199625.6 discloses a kind of " built-up welding is dissolved (DGR) pre- repaired mouth steel pipe ", the steel
Pipe solves the problems, such as small bore pipe wire bonding mouth internal joint patch, but its pre- repaired mouth layer shape can only solve and anti-corrosion in liquid or powdery type
The covering overlap joint problem of coating also has the iron-based mistake of small part cermet if covering cermet in pre- repaired mouth steel pipe
It crosses layer to be clipped between corundum ceramic layer and the pre- repaired mouth layer of stainless steel, can cause the galvanic couple of iron-based transition zone rotten in conducting medium
Erosion, influences the integrality of combination anticorrosion layer in steel pipe.
Chinese Patent Application No. 201510515750.7 discloses a kind of steel pipe weldering for pipe welding port internal joint patch
Mouth inner wall anti-corrosive overlaying method, the process employs wlding coating overlaying structures of the same race, are not directed to the subregion built-up welding of xenogenesis wlding
Structure；
Summary of the invention
The present invention by inner wall of steel tube end using nickel and the pre- first partition built-up welding one fixed width of alloy+two phase stainless steel and
Then the steel pipe for being filled with thermite cermet powder is placed on centrifuge, passes through self- propagating by the corrosion-resistant alloy layer of thickness
(SHS) technology makes cermet material deposition in steel pipe inner wall, forms the metal that both ends inner wall has two phase stainless steel overlay cladding
Steel pipe is covered in ceramics；Overlay cladding is set to cover ceramic layer with interior and reliably overlap by pipe end heat treatment after inside covering；In pipeline welding
Shi Caiyong two phase stainless steel wlding is manually or automatically welded to connect, the interior overlay cladding and steel pipe inner wall cermet coating at weld bond both ends
Form reliable continuous interior erosion resistant coating；The steel pipe, which has in cermet, covers wear-resisting steel pipe, anti-corrosion, high temperature high voltage resistant and good antiscale property
The advantages of, also have the advantages that the pre- repaired mouth steel-pipe welding of built-up welding is simple；
Specific summary of the invention is as follows:
The manufacturing method of steel pipe is covered by base tube tube end maching, pipe end nickel-base alloy+bis- in pre- repaired mouth cermet (DSHS)
Covered in the pre- repaired mouth subregion built-up welding of phase stainless steel, steel pipe inner wall self- propagating cermet, pipe end heat treatment etc. processes constitute；Steel pipe knot
Structure is such as shown in (Fig. 3)；
1, pipe end inwall processing
It is shown to be machined base tube pipe end inner wall such as (Fig. 4), is allowed to expose the white light tone of metal, processing method, which can be, beats
Mill, is also possible to cut；The fewer working depth the better；Working width should meet the needs of retaining wall on slope and pipeline welding；
Base tube can be the mild steel pipeline steel tube of any model；
It is using the effect of machining: guarantees the cleaning of pre- overlay cladding, prevents the presence because of impurity from causing overlay cladding
Dreg defect；
2, subregion built-up welding
The pre- repaired mouth overlay cladding of pipe end is made of as shown in (Fig. 5) prime coat and capping layer；Bottoming overlay cladding uses Ni-based weldering
Material, width about 30mm or so, thickness about 1.2mm or so are moved using TIG away from displacement oscillating build-up welding；The width of capping layer about 30mm
Left and right, thickness about 1.2mm or so are moved using TIG away from displacement oscillating build-up welding；Overlay cladding is all made of far from the welding bead of pipe end side
Wire feed does not swing solution treatment to TIG, while melting overlay cladding and underlying metal is allowed to the appearance interface of bottom in ramped shaped mistake
It crosses；
Be using the effect of this method: a, bottoming weld deposit process can cause dilution and the chromium carbide needle of corrosion resistant alloy ingredient
The formation in hole, the appearance of the unfavorable factor can be prevented by carrying out capping built-up welding again in bottoming overlay surface；B, solid solution is swung
Effect is to make the solid solution layer by near-bottom due to nickel, chromium content are lower close to the ingredient of underlying metal, close to stainless steel built-up welding
The solid solution layer of layer is due to nickel, chromium content are higher close to the ingredient of top-level metallic, it is ensured that capping two phase stainless steel overlay cladding
Corrosion resistance；It c, is to keep the iron-based transition zone of cermet and the Ni-based overlay cladding of bottoming mutual using nickel-base alloy bottoming built-up welding
Molten nickel, chromium content to improve the position, guarantees the corrosion resistance of transition zone and capping overlay cladding appearance engaging portion；
3, overlay cladding is processed in pipe end
The steel pipe of pre- repaired mouth built-up welding is loaded on lathe, turnery processing, processing request are carried out to overlay cladding in pipe end capping
Capping overlay cladding is smooth, and every steel tube inner hole is consistent；
The effect of processing is: a, keeping the pipeline steel tube internal diameter of every batch consistent, constructs convenient for butt welding；B, make capping
Overlay cladding outer surface and cermet internal coated layer maintain an equal level；
4, it is covered in self- propagating (SHS) cermet
The filling metal ceramics thermite powder in steel pipe, cermet thermite powder is mainly by Al and Fe2O3Powder
Composition；The steel pipe for loading powder is placed on centrifuge and rotates and lights powder, self- propagating Metal-ceramie powder in certain atmosphere
The main chemical reactions of material are as follows: Al+Fe2O3=Al2O3+ 2Fe+836KJ/mol (836 every mole of kilojoule), powder lead to after lighting
Crossing the thermogenetic thermal energy of aluminium melts iron-base powder and as the uniform clinkering of the rotation of steel pipe is in steel pipe inner wall formation transition zone
And maintain an equal level with bottoming overlay cladding, the corundum layer clinkering of lighter weight forms ceramic layer on surface and maintains an equal level with capping overlay cladding, gold
The steel pipe belonged to after covering in ceramics can be air-cooled, can also with water cooling, it is cooling after in steel pipe each interlayer overlap joint overlay structure such as (Fig. 6)
It is shown；
5, pipe end is heat-treated
Steel pipe after interior cover is loaded on rotating mechanism, by Medium frequency induction to pipe end inner wall cermet coating and built-up welding
Layer appearance interface carries out induction heating processing, then 900~1000 DEG C of heating temperature rotates air-cooled；
The reason of being heat-treated using pipe end is because pre- repaired mouth built-up welding layer plane is higher than base tube bottom, the position after powder fusing
The thermite negligible amounts set and in pipe end thus temperature it is low compared with intermediate position；Using the effect of pipe end induction heat treatment
It is: makes to be present in the iron-based transition zone ion directional diffusion between bottoming overlay cladding and cermet coating and make its microstructure
It is more uniform, so that transition zone is formed high nickeliferous, chromium alloy, advantageously ensures that the corrosion resistance of surface interface；
Effect of the invention is:
1, it solves the nozzle welding problem for covering steel pipe in cermet by the pre- repaired mouth built-up welding of two phase stainless steel, makes
Steel pipe is covered in high performance cermet may be directly applied to perishable, easy fouling, high temperature high pressure liquid medium easy to wear
In conveyance conduit.
2, the iron-based transition zone for covering bottoming overlay cladding and nickel-base alloy are melted mutually by nickel-base alloy bottoming built-up welding, formed
High nickeliferous, chromium alloy, ensure that the corrosion resistance of surface interface；
Meaning of the present invention is:
Realize the batch production of anti-corrosion and internal joint patch operation in high temperature and pressure steel pipe, standardization；For land or seabed
The conveying of high pressure re-injection waterpipe, high temperature and pressure steam pipe and exceedingly odious medium provides a new selection, for
Raising steel pipe service life, the safety and environmental protection risk for reducing corrosive pipeline leakage, the reduction wasting of resources are of great significance.
Specific implementation step of the invention is as follows:
(1) pipe end mechanical pretreatment: machining inner wall of steel tube end guarantees inner wall of the pipe in certain depth
Within size and the margin of tolerance, it is shown to guarantee that metal true qualities such as (Fig. 4) are exposed in machined surface cleaning；
(2) subregion built-up welding: 1) using three-dimension numerical controlled TIG pipe end inner-wall automatic built-up welding machine in the pipe end that working process is crossed
Wall carries out the built-up welding of nickel-base alloy prime coat and solution treatment；2) it is being beaten using three-dimension numerical controlled TIG pipe end inner-wall automatic built-up welding machine
Built-up welding and the solution treatment of two phase stainless steel capping layer are carried out above the overlay cladding of bottom, subregion built-up welding is such as shown in (Fig. 5)；
(3) it interior overlay cladding machining: is processed using the internal built-up welding capping layer of pipe lathe, reserves capping built-up welding
Thickness degree determines that processing request capping overlay cladding is smooth, and every steel tube inner hole is consistent according to cermet internal coated layer thickness；
(4) it is covered in self- propagating (SHS) cermet: 1) loading aluminothermy cermet powder in steel duct, load quantity
It is determined with proportion according to required ceramic layer thickness and required calorific value；2) steel pipe filled is placed on centrifuge；3) start
Centrifuge makes steel pipe rotary, and revolving speed is determined by interior coating process；4) light thermite cermet powder, make powder melt and with
The rotation of steel pipe is uniformly deposited over steel pipe internal-surface；5) with thermite after-flame, steel pipe is gradually cooled down, to the cooling internal coated layer of steel pipe
Completion is covered after solidification in cermet；The iron-based transition zone of cermet after the completion and bottoming overlay cladding maintain an equal level；Corundum ceramic layer
Maintain an equal level as shown in (Fig. 6) with capping overlay cladding；
(5) steel pipe after cooling is loaded on the spinning device, using medium frequency induction power supply to inner wall of steel tube end metal
Ceramic layer is heat-treated with overlay cladding appearance interface, and 900~1000 DEG C of heating temperature, constant temperature time about 5min or so.
(6) complete steel pipe after cooling is loaded on processing welding groove, groove on mechanical equipment can be V-type or U
Type, to adapt to the needs of manual electric arc welding or automatic welding；
So far, steel pipe is covered in pre- repaired mouth cermet (DSHS) to complete the process；Steel pipe is as needed outer anti-corrosion can be in other lifes
It produces and is completed in equipment；Form after the steel pipe welding is such as shown in (Fig. 7)；
The present invention is characterized in that:
1, the nickel-base alloy in the step (2)+two phase stainless steel subregion built-up welding and solution treatment；
2, it is covered in self- propagating (SHS) cermet in the step (4), the iron-based transition zone of cermet after the completion
Maintain an equal level with bottoming overlay cladding, corundum ceramic layer and capping overlay cladding maintain an equal level, cover the iron-based transition zone of bottoming overlay cladding with it is Ni-based
Overlay cladding, which mutually melts, forms high nickeliferous, chromium alloy；
3, in the step (5) using medium frequency induction power supply to inner wall of steel tube end cermet coating and overlay cladding outside
Interface is seen to be heat-treated；
The principle of the invention lies in:
1, self- propagating (SHS) cermet coating has outstanding wear-resisting, anti-corrosion, high temperature high voltage resistant and good antiscale property characteristic,
It can satisfy the particular/special requirement of the internal erosion resistant coating of high temperature and pressure conveyance conduit；Nickel-base alloy+two phase stainless steel subregion built-up welding is to gold
Belong to and cover the pre- repaired mouth processing of steel pipe progress in ceramics, can solve and cover the technical bottleneck that steel pipe is not easy to weld in cermet；Wherein
Pre- repaired mouth overlay cladding and the iron-based transition zone of cermet and corundum ceramic layer can be realized respectively to the solid solution transition of overlay cladding
Smooth covering overlap joint, can be improved using nickel-base alloy bottoming built-up welding the iron-based transition zone between ceramic layer and overlay cladding nickel,
Chromium content guarantees the corrosion resistance at the position；All use two phase stainless steel built-up welding that can guarantee pipeline group close to bevel end
To welding performance；
2, inner wall of steel tube end cermet coating and overlay cladding appearance interface are heat-treated, can make to be present in bottoming
Iron-based transition zone ion directional diffusion between overlay cladding and cermet coating makes nickeliferous, chromium microcosmic group of alloy transition layer high
It knits more uniform, advantageously ensures that the corrosion resistance of surface interface position
Invention effect
Present invention has an advantage that
1, it solves in cermet and covers steel pipe to welding technique problem, make to cover steel pipe in self- propagating cermet and protect
Under the premise of card weld bond quality and interior erosion resistant coating are continuous, welded steel pipeline can be applied to；
2, a new selection is provided for high temperature and pressure inner wall heavy antisepsis pipeline；
Detailed description of the invention
Fig. 1 is the sectional view of fiber glass epoxy repaired mouth pipe nipple connection:
In figure: 1) repaired mouth pipe nipple attachment weld；2) fiber glass epoxy inner tube；3) flexible sealing；4) heat-barrier material；5) it mends
Mouth pipe nipple butt weld；6) repaired mouth pipe nipple outer tube；
Fig. 2 is that laser ceramics layer welds or ceramic sealing agent blocks the sectional views of ceramic layer only weld metal layers:
In figure: 1) mild steel base tube；2) iron-based transition zone；3) corundum ceramic layer；4) ceramic sealing agent；5) stainless steel welds
Seam；
Fig. 3 is the sectional view that steel pipe is covered in pre- repaired mouth cermet (DSHS):
In figure: 1) mild steel base tube；2) iron-based transition zone；3) corundum ceramic layer；4) two phase stainless steel overlay cladding；5) slope
Mouthful；
Fig. 4 is the sectional view for being machined base tube pipe end inner wall:
In figure: 1) mild steel base tube；2) machined surface；3) inner chamfer；
Fig. 5 is the sectional view of the pre- repaired mouth overlay cladding of pipe end:
In figure: 1) mild steel base tube；2) nickel-base alloy bottoming overlay cladding；3) two phase stainless steel capping overlay cladding；4) bottoming
Built-up welding is dissolved transition region；5) capping built-up welding is dissolved transition region；6) not heap welding zone；
Fig. 6 is the sectional view of the overlap joint overlay structure of each interlayer in steel pipe after cooling down:
In figure: 1) mild steel base tube；2) iron-based transition zone；3) corundum ceramic layer；4) Ni-based bottoming overlay cladding；5) two-phase is not
Become rusty steel lid surface build-up welding layer；
Fig. 7 is the sectional view after steel pipe welding:
In figure: 1) mild steel base tube；2) iron-based transition zone；3) corundum ceramic layer；4) two phase stainless steel overlay cladding；5) two-phase
Stainless steel weld joint；
Specific embodiment
(1) steel pipe for carrying out the solid solution built-up welding of pre- repaired mouth in advance is loaded on numerically-controlled machine tool by step 1, by design requirement plus
Work inner hole guarantees that pre- overlaying surface is clean；
(2) nickel-base alloy+two phase stainless steel subregion built-up welding is carried out to pipe end inner wall by step 2；
(3) internal overlay cladding machining is carried out by step 3；
(4) steel pipe inner wall cover in self- propagating (SHS) cermet by step 4；
(5) pipe end is heat-treated by step 5；
(6) retaining wall on slope is carried out to steel pipe by step 6.
(7) it completes；
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (1)
1. covering the manufacturing method of steel pipe in a kind of pre- repaired mouth cermet, it is characterised in that: specific implementation step is as follows,
(1) pipe end mechanical pretreatment: machining inner wall of steel tube end guarantees inner wall of the pipe in certain depth dimensions
Within the margin of tolerance, guarantee that metal true qualities are exposed in machined surface cleaning；
(2) subregion built-up welding: 1) the pipe end inner wall crossed using three-dimension numerical controlled TIG pipe end inner-wall automatic built-up welding machine in working process into
The built-up welding and solution treatment of row nickel-base alloy prime coat；2) using three-dimension numerical controlled TIG pipe end inner-wall automatic built-up welding machine in bottoming heap
Built-up welding and the solution treatment of two phase stainless steel capping layer, coating built-up welding are carried out above layer；
(3) it interior overlay cladding machining: is processed using the internal overlay cladding of pipe lathe, reserves overlay cladding thickness according to gold
Belong to ceramic internal coated layer thickness to determine；
(4) it is covered in self- propagating cermet: 1) loading aluminothermy cermet powder, filling quantity and proportion root in steel duct
It is determined according to required ceramic layer thickness and required calorific value；2) steel pipe filled is placed on centrifuge；3) starting centrifuge makes
Steel pipe rotary, revolving speed are determined by interior coating process；4) aluminothermy cermet powder is lighted, melts powder and with the rotation of steel pipe
Uniformly it is deposited over steel pipe internal-surface；5) with aluminothermy cermet powder after-flame, steel pipe is gradually cooled down, to the cooling internal coated layer of steel pipe
Completion is covered after solidification in cermet；The iron-based transition zone of cermet after the completion and bottoming overlay cladding maintain an equal level；Corundum ceramic layer
Maintain an equal level with capping overlay cladding, the appearance interface of overlay cladding and underlying metal is in ramped shaped transition, covers the iron-based of bottoming overlay cladding
Transition zone and Ni-based overlay cladding, which mutually melt, forms high nickeliferous, chromium alloy；
(5) steel pipe after cooling is loaded on the spinning device, using medium frequency induction power supply to inner wall of steel tube end cermet
Layer is heat-treated with overlay cladding appearance interface, and 900~1000 DEG C of heating temperature, constant temperature time 2min；
(6) complete steel pipe after cooling is loaded on processing welding groove on mechanical equipment, groove is V-type or U-shaped.
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| CN107584091A (en) * | 2017-09-27 | 2018-01-16 | 安徽工程大学 | A kind of centrifugal casting pipe mould restorative procedure of near-net-shape |
| CN113464732B (en) * | 2020-03-30 | 2023-07-04 | 中国石油化工股份有限公司 | Metal nickel-based ceramic three-layer composite steel pipe and preparation method thereof |
| CN114505656B (en) * | 2022-03-22 | 2023-06-06 | 烟台杰瑞石油装备技术有限公司 | Manufacturing process of plunger pump housing, plunger pump housing and plunger pump |
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Effective date of registration: 20170727 Address after: 257000 No. 83, North Road, Dongying District, Shandong, Dongying Applicant after: SHANDONG SHENGLI CHANGLONG PIPELINE TECHNOLOGY CO.,LTD. Applicant after: Li Guanghua Address before: 257000 No. 83, North Road, Dongying District, Shandong, Dongying Applicant before: SHANDONG SHENGLI CHANGLONG PIPELINE TECHNOLOGY CO.,LTD. |
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Denomination of invention: Manufacturing method for pre patched metal ceramic coated steel pipes Effective date of registration: 20231030 Granted publication date: 20181225 Pledgee: Qilu Bank Co.,Ltd. Dongying Dongying District Branch Pledgor: SHANDONG SHENGLI CHANGLONG PIPELINE TECHNOLOGY CO.,LTD. Registration number: Y2023980063359 |