CN109306436A - A kind of antiacid pipeline clad steel plate and its manufacturing method with corrosion resistance - Google Patents
A kind of antiacid pipeline clad steel plate and its manufacturing method with corrosion resistance Download PDFInfo
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- CN109306436A CN109306436A CN201710630532.7A CN201710630532A CN109306436A CN 109306436 A CN109306436 A CN 109306436A CN 201710630532 A CN201710630532 A CN 201710630532A CN 109306436 A CN109306436 A CN 109306436A
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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
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
-
- 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
- C22C38/02—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
- C22C38/06—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
- C22C38/40—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
- B21B2001/386—Plates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2201/00—Special rolling modes
- B21B2201/06—Thermomechanical rolling
Abstract
The invention discloses a kind of antiacid pipeline clad steel plate with corrosion resistance comprising carbon steel base layer and the stainless steel cladding with carbon steel base layer Rolling compund, the stainless steel cladding are austenitic stainless steel；The chemical element mass percent of the carbon steel base layer are as follows: C:0.02-0.05%；Mn:0.6-1.20%；Cr:0.30-0.50%；Nb:0.06-0.12%；Ni:0-0.50%；Ti:0.005-0.02%；Si:0.05-0.45%；Al:0.01-0.05%；Ca:0.001-0.003%, surplus are Fe and other inevitable impurity.In addition, the invention also discloses the manufacturing methods of the above-mentioned antiacid pipeline clad steel plate with corrosion resistance.The antiacid pipeline is all satisfied the requirement of welded pipe spool with clad steel plate mechanical property, welding performance and has high corrosion resistance, and the performance requirement of antiacid pipeline clad steel plate product can just be met by requiring no heat treatment.
Description
Technical field
The present invention relates to a kind of steel plate and its manufacturing method more particularly to a kind of clad steel plate and its manufacturing methods.
Background technique
In the oil-gas mining area of some inclement conditions, the petroleum day of the strong corrosive containing various ingredients mixing of extraction
Right gas, such as containing the H of high concentration2S、CO2Deng.Low-alloy pipeline steel tube common at this time is unable to satisfy these CO2High corrosion gas
Conveying.If one side pipe-line construction cost is sufficiently expensive using the stainless steel tube with high corrosion resistance, on the other hand not
Rust steel is also difficult to meet the mechanical property requirements of conveyance conduit high intensity, and welding procedure is difficult.
For people in order to obtain the pipeline steel tube of high corrosion resistance as described above, what is generallyd use at present is mechanical composite tube
Line steel pipe, i.e., by then keeping inner liner stainless steel pipe swollen by technologies such as liquid, detonations in common pipeline inner lining of steel pipe stainless steel tube
Swollen, frictional force caused by the expansion pressure between double layer of metal realizes the physical bond between two kinds of metal tubes.However, this machine
It is not bound with power on wall thickness direction between the bimetallic of tool multiple tube, so being led to the non-of pipe deformation by some in steel pipe
When uniform external force, double-metal layer will be separated.It since inner liner metal layer is very thin, easily damages, to make whole root canal steel wire
The corrosion resisting property of pipe fails.
Aiming at the problem that double-level-metal bond strength, need compound using having metallurgical melting mode to combine between bimetallic
Welded tube needs to be welded using metallurgical composite plate.In terms of realizing metallurgical composite plate, mainly there are hot rolling, explosion, built-up welding etc. multiple
Conjunction technology, Explosion composite are still the main method of current production metallurgy clad steel plate.Explosion composite is made multiple by explosion wave
Layer metal and substrate high-speed impact generate high temperature and pressure formed metallurgy it is compound, Explosion composite manufacture clad steel plate specification,
Compound uniformity, steel-plate shape, Shortcomings in terms of production efficiency, be all difficult to meet specification it is big, it is compound uniformly, plate shape wants
The production of Pipeline Steel Plate high, that output demand is high is asked, however, explosive welding production clad steel plate has compound uneven, production
The features such as low efficiency, it is difficult to meet the production of Pipeline Steel Plate.
In addition, there are also be partially related to the stainless compound steel plate of method hot rolling, such as Publication No. for the prior art
CN102555334A, publication date are on July 11st, 2012, the Chinese patent literature of entitled " stainless steel and plain carbon steel composite board "
It is related to the stainless steel and plain carbon steel composite board of a kind of thin gauge, carbon steel substrate thickness 0.45-2.5mm, stainless steel layer thickness
0.05-0.5mm.But from the point of view of the technical solution disclosed in it, the only simple rolling overlapping between double layer of metal, related rule
Lattice are relatively thin, are mainly used in aqueduct, it is difficult to be applied to line pipe.Separately there is Explosion composite+hot rolling production production technology, leads to
Explosive welding manufacture cladding corrosion resistant plate+base pipeline steel plate composition bimetallic blank material is crossed, smoothing, heating, substrate list are passed through
Face cooling, the double-deck Asymmetric Rolling, smoothing and cutting obtain long 6000mm~16000mm, wide 500mm~3000mm, thickness
The oil and gas pipeline steel/pipe line steel composite plate of 10mm or more.Its technical characterstic is exactly the double-deck gold of explosive welding manufacture
Belong to composite plate blanks, then double-level-metal Asymmetric Rolling is formed.
Publication No. JP5154672 (A), publication date are on June 22nd, 1993, entitled " MANUFACTURE OF
The Japanese documentation of HIGH-STRENGTH AND HIGH-TOUGHNESS CLAD STEELPLATE " discloses a kind of corrosion resistant
The manufacturing process of corrosion oil gas pipeline clad steel plate, 1050 DEG C or more are heated, and 1000-850 DEG C of pressure is greater than 30%,
850-750 DEG C of pressure is then air-cooled greater than 30%.However, technical solution disclosed in the patent document cannot be guaranteed stainless steel
With good corrosion resisting property.
In conclusion problems of the prior art are: for antiacid pipeline method hot rolling steel plate, needing to protect simultaneously
Hold the corrosion resisting property of stainless steel layer, also to guarantee carbon steel substrate have Antacid effectiveness and corresponding intensity, low-temperature impact toughness and
Low temperature drop weight tearing (DWTT) performance, there are difficulty in production technology for this.Because stainless steel and carbon steel will together with roll
System, and rolled in 880 DEG C of following temperature, the Cr in stainless steel can be precipitated in the form of carbide, cause office in stainless structure of steel
The poor Cr in portion, so that corrosion among crystalline grains reduce；But it is rolled in 880 DEG C of temperatures above, carbon steel can be because high temperature rolling be difficult to effectively
Ground thinning microstructure is unsatisfactory for the technology of pipeline so that the impact flexibility of clad steel plate substrate and DWTT performance substantially reduce
It is required that.
Just because of having such technical difficulty, even if the existing method hot rolling steel plate for pipeline passes through method hot rolling work
Skill produces clad steel plate, and the performance requirement of pipeline composite steel tube could be also finally met by being further heat-treated.
Based on this, it is expected that by thermo-mechanical rolling and obtains a kind of antiacid pipeline clad steel plate for being able to satisfy Welded tube production,
It is able to solve the above problem, requires no heat treatment, both the Antacid effectiveness with conventional pipeline steel, mechanical property, welding performance,
Meet the requirement of welded pipe spool；Again with lower cost of alloy, the high corrosion resistance of stainless steel is obtained.
Summary of the invention
One of the objects of the present invention is to provide a kind of antiacid pipeline clad steel plate with corrosion resistance, using carbon steel
Base and stainless steel cladding with carbon steel base layer Rolling compund, require no heat treatment and obtain method hot rolling plate, obtained
Method hot rolling plate had both had the Antacid effectiveness of conventional pipeline steel, mechanical property, welding performance, and the use for meeting welded pipe spool is wanted
It asks；Again with lower cost of alloy, the high corrosion resistance of stainless steel is obtained, therefore, which is a kind of with clad steel plate
High antacid hot rolling Pipeline Steel Plate with stainless steel corrosion resisting property.
To achieve the goals above, the invention proposes a kind of antiacid pipeline clad steel plate with corrosion resistance,
Including carbon steel base layer and with the stainless steel cladding of carbon steel base layer Rolling compund, the stainless steel cladding be austenitic stainless steel；
The chemical element mass percent of the carbon steel base layer are as follows:
C:0.02-0.05%；Mn:0.6-1.20%；Cr:0.30-0.50%；Nb:0.06-0.12%；Ni:0-
0.50%；Ti:0.005-0.02%；Si:0.05-0.45%；Al:0.01-0.05%；Ca:0.001-0.003%, surplus are
Fe and other inevitable impurity.
Each chemical element of the inventor to the antiacid pipeline clad steel plate of the present invention with corrosion resistance
It is designed, design principle is as described below:
C: in the antiacid pipeline clad steel plate of the present invention with corrosion resistance, carbon is basic intensified element.C
Element is dissolved in steel as interstitial atom, plays solution strengthening, and be capable of forming carbide, plays precipitation strength work
With.But C is unfavorable to the toughness and welding performance of steel, and the mass percent of the C of the pipe line steel in currently available technology is in 0.04-
0.08%.But C is strong segregation element, be easy to cause serious gross segregation and microsegregation, substantially reduces the anti-of carbon steel substrate
H2S corrosive nature.Therefore, in technical solutions according to the invention, in order to guarantee the Antacid effectiveness of steel, and in high temperature rolling
Toughness, the DWTT performance of steel under technique are designed using low C, i.e., control the mass percent of C 0.02~0.05%.
Mn: in the antiacid pipeline clad steel plate of the present invention with corrosion resistance, Mn is low-alloy high-strength steel
Basic alloy element, by solution strengthening improve steel intensity, can compensate in steel because C content reduce due to cause intensity to be damaged
It loses.In addition, Mn still expands the element of γ phase region, γ → α phase transition temperature of steel can be reduced, helps to obtain when steel plate is cooling thin
The toughness of steel can be improved in small phase-change product, so the mass percent of the Mn of usually pipe line steel in the prior art generally exists
1.2-1.8%.However, Mn is also easy segregation element strongly, in order to reduce the decline of capacity antacid caused by center segregation,
It is designed, i.e., controlled the mass percent of Mn 0.6~1.20% using low Mn in technical solutions according to the invention.
Cr: in the antiacid pipeline clad steel plate of the present invention with corrosion resistance, Cr is the important reinforcing of steel
Element.Your elements Mo Cr can replace improve the harden ability of steel plate, be conducive to obtain the higher bainite structure of intensity.In the present invention
In the technical solution, adds a certain amount of Cr and can mitigate the Cr of carbon steel base layer and stainless steel double combination interface layer by layer and dilute
Caused stainless steel cladding corrosion resistance reduces, simultaneously because designed using the low Mn of low C, thus, technology of the present invention
Scheme compensates the harden ability and intensity of steel by Cr.Compared with Mo, Cr ten divides inexpensively, but the Cr of excessive mass percent is not
Conducive to welding performance and low-temperature flexibility, therefore, in the antiacid pipeline clad steel plate of the present invention with corrosion resistance
Carbon steel base layer 0.30-0.50% is limited to the mass percent of Cr.
Nb: in the antiacid pipeline clad steel plate of the present invention with corrosion resistance, Nb is important microalloy
Element.Nb can significantly improve the recrystallization final temperature of steel, provide broader deformation temperature range for the rolling of non-recrystallization zone, make
Deformed austeaite group, which is woven in, is changed into more tiny phase-change product when phase transformation, effectively refinement crystal grain, improve steel plate intensity and
Toughness.In the roller repairing stage, Nb disperse educt in the form of carbonitride improves intensity and does not lose toughness, therefore Nb is
Key element in steel in highly important grain refining strengthening element and technical solutions according to the invention.In order to avoid
The sensitizing temperature of stainless steel cladding, antiacid pipeline of the present invention clad steel plate need to complete in 880 DEG C or more high temperature complete
Portion's rolling, therefore, it is necessary to add Nb raising recrystallization temperature to be important ingredient design, the Nb of 0.06% or more mass percent
It can guarantee that the tissue of carbon steel substrate under the conditions of high temperature rolling can be more tiny, to guarantee that antiacid pipeline of the present invention is used
The low-temperature impact toughness and DWTT performance of clad steel plate.Therefore, in technical solutions according to the invention, carbon steel base layer is to Nb's
Mass percent is controlled 0.06%~0.12%.
Ni: in the antiacid pipeline clad steel plate of the present invention with corrosion resistance, Ni is important toughening member
Element；A certain amount of Ni element is added, the intensity of steel not only can be improved, it is often more important that the ductile-brittle transition temperature of steel can be reduced
Point, to improve the toughness of steel under cryogenic.In addition, Ni is to raising carbon steel in technical solutions according to the invention
The corrosion resisting property of substrate is also beneficial to, but Ni is precious metal element, the excessively high cost that can greatly increase steel of mass percent, because
This, in some preferred embodiments, the carbon in the antiacid pipeline clad steel plate of the present invention with corrosion resistance
Base steel layer adds the mass percent of Ni in 0-0.50%.
Ti: in the antiacid pipeline clad steel plate of the present invention with corrosion resistance, Ti is important microalloy
Element.Ti is strong N element, and TiN can be formed in conjunction with the N element of free state in molten steel, while can be with shape in solid phase steel
At the carbonitride of Ti, Austenite Grain Growth is hindered, is conducive to thinning microstructure.Just because of this, Ti can improve sweating heat shadow
The impact flexibility for ringing area, is conducive to the welding performance of steel.However, the mass percent of Ti is excessively high, consolidating for titanium carbonitride will increase
Solubility product keeps precipitation particles coarse, is unfavorable for thinning microstructure, therefore, the antiacid pipeline of the present invention with corrosion resistance
It is controlled with mass percent of the clad steel to the Ti of carbon steel base layer in 0.005-0.02%.
Si: silicon is the essential elements of deoxidation in steel making, there is certain solution strengthening effect, the mass percent mistake of Si in steel
Height will affect the toughness of steel, and welding performance is made to be deteriorated.Therefore, the antiacid pipeline of the present invention with corrosion resistance is used
In clad steel plate, the mass percent of the Si in carbon steel base layer is controlled in 0.05-0.45%.
Al: aluminium is deoxidation in steel making element, adds suitable Al and is conducive to refine crystal grain, improves the toughness and tenacity of steel.Cause
This, in the antiacid pipeline clad steel plate of the present invention with corrosion resistance, to the quality hundred of the Al in carbon steel base layer
Divide than control in 0.01-0.05%.
Ca: in the antiacid pipeline clad steel plate of the present invention with corrosion resistance, being handled by Ca can be controlled
The form of sulfide processed improves the low-temperature flexibility of steel plate.There is no effect when the mass percent of Ca is less than 0.001%, however,
When the excessively high field trash that can make Ca of mass percent increases, size increase, the toughness of steel is damaged.Therefore, in the present invention
In the antiacid pipeline clad steel plate with corrosion resistance, exist to the mass percent control of the Al of carbon steel base layer
0.001%-0.003%
In technical solutions according to the invention, the mass percent of impurity element should be controlled more lower better, such as:
The defects of nitrogen phosphate and sulfur easily forms segregation, is mingled with deteriorates the welding performance, impact flexibility and Properties of HIC resistance of pipe line steel, in order to protect
The good low-temperature toughness for demonstrate,proving steel plate, by the control of the mass percent of the impurity element in carbon steel base layer in lower level, N≤
0.004%, P≤0.012%, S≤0.006%.
In conclusion the carbon steel base layer in the antiacid pipeline clad steel plate is made by the ingredient design of the low manganese of low-carbon
Carbon steel base layer metal has high antacid performance, meets the use that compound rear clad steel plate meets peracidity Service Environment.
Further, in the antiacid pipeline clad steel plate of the present invention with corrosion resistance, the austenite
The chemical element mass percent of stainless steel are as follows:
0 < C≤0.030%, Cr:16.0-18.0%, Ni:12.0-15.0%, Mo:2.0-3.0%, Mn≤2.0%, Si
≤ 1.0%, surplus is Fe and other inevitable impurity.
C: in the antiacid pipeline clad steel plate of the present invention with corrosion resistance, low carbon content is conducive to mention
The corrosion resisting property of high stainless steel cladding, technical solutions according to the invention are because compound between stainless steel cladding and carbon steel base layer roll
System needs the rolling temperature far below conventional stainless steel to be rolled to guarantee the mechanical property of carbon steel base layer.High carbon contains
Amount is easy to cause the Carbide Precipitation of Cr, causes the decline of stainless steel double interlayer intergranular corrosion resistance performance.Therefore, of the present invention
The antiacid pipeline with corrosion resistance with clad steel plate control C mass percent in 0 < C≤0.030%.
The mass percent of Cr, Ni, Mo are limited to Cr:16.0-18.0%, Ni:12.0-15.0%, Mo:2.0-
3.0%, advantageously ensure that stainless steel cladding has sufficient corrosion resisting property, the antiacid pipeline clad steel plate after guarantee is compound exists
Meet resistance to CO when oil-gas transportation2、H2The requirement of the corrosive mediums such as S.
The austenitic stainless steel of Mn, Si:Mn and Si in antiacid pipeline clad steel plate of the present invention can rise solid
The effect of molten reinforcing, but the excessively high welding performance that will affect steel of mass percent of Mn, Si, therefore, in tool of the present invention
Have in the antiacid pipeline clad steel plate of corrosion resistance in austenitic stainless steel Mn, Si mass percent limit Mn≤
2.0%, Si≤1.0%.
Further, in the antiacid pipeline clad steel plate of the present invention with corrosion resistance, the stainless steel
Cladding with a thickness of 1-10mm.
Further, in the antiacid pipeline clad steel plate of the present invention with corrosion resistance, the carbon steel base
Layer with a thickness of 3-50mm.
In above scheme, by the thickness control of stainless steel cladding in 1-10mm, the thickness control of carbon steel base layer in 3-50mm,
The steel plate for the wider more long size that composite rolling of the present invention is produced than explosion cladding process is advantageously allowed, and the present invention is multiple
It is smooth to close the steel plate face rolled out, meets the application requirement of line pipe tubulation.
Further, in the antiacid pipeline clad steel plate of the present invention with corrosion resistance, yield strength
For 450-600MPa, tensile strength 535-760MPa, -20 DEG C of impact value >=250J, -20 DEG C of DWTT performance SA% >=85%,
Shear strength >=300MPa of its compound interface, with anti-CO2、H2S performance.
Another object of the present invention is to provide a kind of above-mentioned antiacid pipeline clad steel plates with corrosion resistance
Manufacturing method, which obtains metallurgical composite plate by thermo-mechanical rolling for carbon steel base layer and stainless steel cladding, using this
Manufacturing method is produced by continuous casting process, and the steel billet produced is directly used in the assembly of clad steel plate or by being rolled down to one
Production composite billet is used further to after determining thickness.
In order to achieve the above object, the invention proposes a kind of above-mentioned antiacid pipeline clad steels with corrosion resistance
The manufacturing method of plate, comprising steps of
(1) carbon steel base layer steel billet and stainless steel cladding steel billet or steel plate are obtained；
(2) symmetrical assembly；
(3) symmetry rolling: being reheated at 1100-1200 DEG C, is rolled after austenitizing is abundant, and rolling is divided into the
The rolling of one stage recrystallization zone and the rolling of second stage Unhydrated cement, the start rolling temperature that wherein first stage recrystallization zone rolls
Less than 1200 DEG C, for finishing temperature at 1000 DEG C or more, the start rolling temperature of second stage Unhydrated cement rolling is lower than 930 DEG C,
Finishing temperature is at 880 DEG C or more；
(4) water cooling after rolling；
(5) clad steel plate of symmetry rolling is separated.
In above scheme, in step (1), selects the stainless-steel sheet of respective thickness or use stainless steel casting blank hot rolling
At the stainless steel cladding steel billet for requiring thickness, according still further to cladding steel billet or the steel plate thickness requirement of final clad steel plate and composite steel
The thickness of base or steel plate and carbon steel base layer steel billet ratio, carries out the assembly of composite billet.
In step (2), the carbon steel base layer steel billet and stainless steel cladding steel billet or steel plate for needing assembly are carried out before assembly
Removing surface, clean surface are superimposed with each other, surrounding by compound assembly soldering and extract out overlapping space of planes air, welded seal.
In some embodiments, prepare two blocks of compound assemblies of vacuum welding, two blocks of compound assemblies are superimposed together shape
At symmetrical assembly, the superposed surfaces of compound assembly can be stainless steel to stainless steel or carbon steel substrate to carbon steel substrate.Complex group
One layer of nonmetallic release agent is distributed between the superposed surfaces of base, then surrounding, which equally imposes, welds and vacuumize, and thus forms four layers
The symmetrical symmetrical assembly of steel billet.Four layers of symmetrical assembly are advantageous in that and symmetry rolling may be implemented, and avoid stainless steel double
Layer and carbon steel base layer different warpage issues caused in the operation of rolling of resistance of deformation in the hot rolling.
In step (3), symmetrical assembly is sufficiently reheated at 1100-1200 DEG C, austenitizing sufficiently carries out afterwards
Rolling, rolling is divided into the rolling of first stage recrystallization zone and second stage Unhydrated cement rolls two temperature stages and carries out.Its
In, heating temperature is limited to 1100-1200 DEG C, it is ensured that the abundant solid solution of the microalloy elements such as Nb, and can be to avoid heating
Temperature is excessively high to lead to the reduced performances such as the austenite excessively coarse DWTT for leading to final steel plate.Start rolling temperature is less than 1200 DEG C,
Finishing temperature is at 1000 DEG C or more, and the start rolling temperature of second stage Unhydrated cement rolling is lower than 930 DEG C, and finishing temperature is 880
DEG C or more.The rolling of first stage recrystallization zone is the key that steel plate austenite recrystallization crystal grain refinement, and shape between the double-deck steel billet
At the compound key of metallurgy.First stage rolling will be rolled at 1100 DEG C or more, be because antiacid pipeline of the present invention is used
The mass percent of Nb is higher in steel plate, so recrystallization temperature is higher, is easily accessible part in 1100 DEG C or less rollings and ties again
Crystalline region influences the low-temperature flexibility of final steel plate so as to cause steel plate nonuniform organization.
In addition, the rolling of second stage Unhydrated cement is the key that the final structure refinement of steel plate, open rolling temperature in above scheme
Degree is lower than 930 DEG C, and finishing temperature is at 880 DEG C or more, this is because: finishing temperature should be in Ar3 point for usual pipe line steel
The above alap temperature, and technical solution of the present invention stops in order to avoid stainless steel cladding at 860 DEG C or less for a long time, leads
Causing the Carbide Precipitation of Cr causes corrosion resisting property to reduce, and therefore, finishing temperature control is rolled at 880 DEG C or more.
Further, in manufacturing method of the present invention, in the step (3), the change of last two passage is controlled
Shape amount is 15-20%.
Further, in manufacturing method of the present invention, when from step (3) to step (4), control finish to gauge terminates
It is less than 30s to the water time is entered.
This is because finishing temperature control is in 880 DEG C or more high temperature rollings in the technical solution of this case, for clad steel plate
The low-temperature flexibilities such as good DWTT are obtained, thus need to increase storage deformation energy, obtain thinning microstructure.Therefore, second stage is rolled
The back-end process of system should increase roll reduction and as soon as possible rolling rhythm as far as possible, to reduce turnaround time, increase steel plate
Accumulated deformation energy before entering water.This needs to be configured according to the ability of milling train, thus controls the deformation quantity 15- of last two passage
20%, finish to gauge terminates to entering the water time less than 30s.
Further, in manufacturing method of the present invention, in the step (4), cold temperature >=860 are opened in control
DEG C, cooling velocity >=30 DEG C/s, final cooling temperature≤450 DEG C, this is that it is rotten to reduce intergranular in order to avoid stainless steel cladding is sensitized
Corrosion energy.
Antiacid pipeline of the present invention with corrosion resistance is a kind of method hot rolling Pipeline Steel Plate with clad steel plate, thick
Relatively thin stainless steel cladding being spent as pipeline inside pipe wall, the high corrosion resistance of corrosion resistance medium being provided, carbon steel base layer can be used as
Pipeline pipe outer wall provides the mechanical property needed.
In addition, the antiacid pipeline with corrosion resistance of the present invention also resides in rolled with clad steel plate
Steel plate is without being heat-treated, and stainless steel cladding has excellent spot corrosion, anti intercrystalline corrosion performance, while carbon steel base layer has
There is 450MPa grades of tensile property, and keep good low temperature impact, DWTT performance, can directly meet the production of pipeline welded tube.
In addition, the carbon steel base layer of the antiacid pipeline clad steel plate of the present invention with corrosion resistance is low using low-carbon
Manganese ingredient design, it is possible to reduce the segregation of C, Mn element improves the capacity antacid of substrate.The ingredient design of the low manganese of low-carbon mentions simultaneously
The high low-temperature flexibility of steel plate.Cooperation addition Nb microalloy, may be implemented the tissue thinning effect of 880 DEG C of temperatures above rolling,
Guarantee that final clad steel plate does not have to heat treatment and can meet substrate pipe line steel while meeting stainless steel corrosion resisting property
The toughness reguirements such as DWTT.
The manufacturing method of antiacid pipeline clad steel plate of the present invention with corrosion resistance passes through thermo-mechanical rolling,
Realize that good metallurgy is compound between stainless steel cladding and carbon steel base layer, the stainless steel cladding of clad steel plate and cutting for carbon steel base layer
In 300MPa or more, clad steel plate has good overall mechanical properties, meets the mechanical property of welded pipeline tube wall shearing stress
It can require.In addition, the wider more long size more than explosion cladding process can be produced using manufacturing method of the present invention
Steel plate, and steel plate face obtained is smooth, meets the application requirement of line pipe tubulation.
Detailed description of the invention
Fig. 1 is the metallographic structure figure of the compound interface of the antiacid pipeline clad steel plate with corrosion resistance of embodiment 1.
Fig. 2 illustrates alloy member of the antiacid pipeline clad steel plate with corrosion resistance in compound interface of embodiment 1
The diffusion layer of element.
Specific embodiment
Below in conjunction with Figure of description and specific embodiment to the antiacid pipe of the present invention with corrosion resistance
Line is made further explanation with clad steel plate and its manufacturing method, however the explanation and illustration is not to skill of the invention
The improper restriction of art forecast scheme configuration.
Embodiment 1-5
Table 1 lists each chemical element in the antiacid pipeline clad steel plate with corrosion resistance of embodiment 1-5
Mass percent.
Table 1. (wt%, surplus are Fe and other inevitable impurity elements other than P, S, N)
The manufacturing method of the antiacid pipeline clad steel plate with corrosion resistance of embodiment 1-5 comprising steps of
(1) carbon steel base layer steel billet and stainless steel cladding steel billet or steel plate are obtained；
(2) symmetrical assembly；
(3) symmetry rolling: being reheated at 1100-1200 DEG C, is rolled after austenitizing is abundant, and rolling is divided into the
The rolling of one stage recrystallization zone and the rolling of second stage Unhydrated cement, the start rolling temperature that wherein first stage recrystallization zone rolls
Less than 1200 DEG C, for finishing temperature at 1000 DEG C or more, the start rolling temperature of second stage Unhydrated cement rolling is lower than 930 DEG C,
Finishing temperature is at 880 DEG C or more；The deflection for controlling last two passage is 15-20%；
(4) water cooling after rolling: cold temperature >=860 DEG C, cooling velocity >=30 DEG C/s, final cooling temperature≤450 DEG C are opened in control；
(5) clad steel plate of symmetry rolling is separated.
It should be noted that when from step (3) to step (4), control finish to gauge terminates to entering the water time less than 30s.
Table 2 lists the tool in the manufacturing method of the antiacid pipeline clad steel plate with corrosion resistance of embodiment 1-5
Body technology parameter.
Table 2.
The antiacid pipeline with corrosion resistance of embodiment 1-5 has carried out performance measurement with clad steel plate, wherein steel plate rolls
After the completion of system, upper and lower plates trimming separation just forms two clad steel plates.The performance test results of steel plate are listed in table 3 to table 5,
In, table 3 lists the mechanical property of clad steel plate, and table 4 lists carbon steel base layer Properties of HIC resistance test result, and table 5 lists steel
Plate combined strength bination test result.
Table 3.
As can be seen from Table 3, the surrender of the antiacid pipeline clad steel plate with corrosion resistance of each embodiment of this case is strong
Degree in 450-600MPa, tensile strength in 535-760MPa, -20 DEG C of impact value >=250J, -20 DEG C of DWTT performance SA% >=
85%.
Table 4.
| Embodiment | Technique | Crack length rate CLR (%) | Crack thickness rate CTR (%) | Crack-sensitivity rate CSR (%) |
| 1 | Solution A | 0 | 0 | 0 |
| 2 | Solution A | 0 | 0 | 0 |
| 3 | Solution A | 0 | 0 | 0 |
| 4 | Solution A | 0 | 0 | 0 |
| 5 | Solution A | 0 | 0 | 0 |
Note: solution A refers to normal temperature and pressure H containing saturation in table 425wt% sodium chloride+0.5wt% the acetum of S.
As can be seen from Table 4, the carbon steel base layer of the antiacid pipeline clad steel plate of each embodiment of this case is soaked in solution A
Bubble 96 hours, crack length rate CLR (%), crack thickness rate CTR (%), the crack-sensitivity rate CSR (%) of each embodiment are
0。
In addition, carrying out corrosion among crystalline grains test, the bending of soak test sample using ASTMA262E method to stainless steel cladding
Flawless afterwards indicates that each embodiment test result is qualified.
Table 5.
As can be seen from Table 5, the shear strength of the antiacid pipeline of each embodiment clad steel plate interlayer all 350MPa with
On, show that the metallurgical bonding of each embodiment is good.
Fig. 1 is the metallographic structure figure of the compound interface of the antiacid pipeline clad steel plate with corrosion resistance of embodiment 1.
As shown in Figure 1, the compound interface of the antiacid pipeline clad steel plate with corrosion resistance of embodiment 1 is smooth intact
It falls into.
Fig. 2 illustrates alloy member of the antiacid pipeline clad steel plate with corrosion resistance in compound interface of embodiment 1
The diffusion layer of element.
As shown in Fig. 2, the antiacid pipeline clad steel plate with corrosion resistance of embodiment 1 has 10-20 in compound interface
The alloy diffusion of micron, wherein I indicates that Ni element, II indicate that Mo element, III indicate Cr, and embodiment 1 has as seen from Figure 2
There is good metallurgy infiltration to roll conjunction.
It should be noted that in this case documented group in the combination of each technical characteristic and unlimited this case claim
Combination documented by conjunction mode or specific embodiment, all technical characteristics that this case is recorded can carry out in any way
Independent assortment combines, unless generating contradiction between each other.
In addition, it is also to be noted that the above list is only specific embodiments of the present invention, it is clear that the present invention is not limited to
Above embodiments have many similar variations therewith.If those skilled in the art is direct from present disclosure
All deformations for exporting or associating, are within the scope of protection of the invention.
Claims (9)
1. a kind of antiacid pipeline clad steel plate with corrosion resistance comprising carbon steel base layer and multiple with carbon steel base layer rolling
The stainless steel cladding of conjunction, it is characterised in that:
The stainless steel cladding is austenitic stainless steel；
The chemical element mass percent of the carbon steel base layer are as follows:
C:0.02-0.05%；Mn:0.6-1.20%；Cr:0.30-0.50%；Nb:0.06-0.12%；Ni:0-0.50%；Ti:
0.005-0.02%；Si:0.05-0.45%；Al:0.01-0.05%；Ca:0.001-0.003%, surplus be Fe and other not
Evitable impurity.
2. as described in claim 1 with the antiacid pipeline clad steel plate of corrosion resistance, which is characterized in that the austenite
The chemical element mass percent of stainless steel are as follows:
0 < C≤0.030%, Cr:16.0-18.0%, Ni:12.0-15.0%, Mo:2.0-3.0%, Mn≤2.0%, Si≤
1.0%, surplus is Fe and other inevitable impurity.
3. as described in claim 1 with the antiacid pipeline clad steel plate of corrosion resistance, which is characterized in that the stainless steel
Cladding with a thickness of 1-10mm.
4. the antiacid pipeline clad steel plate as claimed in claim 1 or 3 with corrosion resistance, which is characterized in that the carbon
Base steel layer with a thickness of 3-50mm.
5. as described in claim 1 with the antiacid pipeline clad steel plate of corrosion resistance, yield strength 450-
600MPa, tensile strength 535-760MPa, -20 DEG C of impact value >=250J, -20 DEG C of DWTT performance SA% >=85% are compound
Shear strength >=the 300MPa at interface, with anti-CO2、H2S performance.
6. the manufacturer of the antiacid pipeline clad steel plate with corrosion resistance as described in any one of claim 1-5
Method, which is characterized in that comprising steps of
(1) carbon steel base layer steel billet and stainless steel cladding steel billet or steel plate are obtained；
(2) symmetrical assembly；
(3) symmetry rolling: being reheated at 1100-1200 DEG C, is rolled after austenitizing is abundant, and rolling is divided into the first rank
The rolling of section recrystallization zone and the rolling of second stage Unhydrated cement, wherein the start rolling temperature of first stage recrystallization zone rolling is lower than
It is 1200 DEG C, finishing temperature is at 1000 DEG C or more, and the start rolling temperature of second stage Unhydrated cement rolling is lower than 930 DEG C, finish to gauge
Temperature is at 880 DEG C or more；
(4) water cooling after rolling；
(5) clad steel plate of symmetry rolling is separated.
7. manufacturing method as claimed in claim 6, which is characterized in that in the step (3), control the change of last two passage
Shape amount is 15-20%.
8. manufacturing method as claimed in claim 6, which is characterized in that when from step (3) to step (4), control finish to gauge knot
Beam is less than 30s to the water time is entered.
9. the manufacturing method as described in claim 6-8, which is characterized in that in the step (4), control open cold temperature >=
860 DEG C, cooling velocity >=30 DEG C/s, final cooling temperature≤450 DEG C.
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Application publication date: 20190205 |