CN109108071A - A kind of high strength anti-corrosion single-side stainless steel composite plate and its manufacturing method - Google Patents
A kind of high strength anti-corrosion single-side stainless steel composite plate and its manufacturing method Download PDFInfo
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- CN109108071A CN109108071A CN201710495538.8A CN201710495538A CN109108071A CN 109108071 A CN109108071 A CN 109108071A CN 201710495538 A CN201710495538 A CN 201710495538A CN 109108071 A CN109108071 A CN 109108071A
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/001—Austenite
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/009—Pearlite
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a kind of high strength anti-corrosion single-side stainless steel composite plates comprising substrate and single side Rolling compund are in the stainless steel cladding of substrate surface；The chemical element mass percent of the substrate are as follows: C:0.02~0.10%, 0 < Si≤0.20%, Mn:0.2~1.0%, Al:0.02~0.06%, Ti:0.02~0.06%, Nb:0.005~0.020%, N:0.003~0.008%, surplus are iron and other inevitable impurity.In addition, the invention also discloses a kind of manufacturing methods of above-mentioned high strength anti-corrosion single-side stainless steel composite plate, comprising steps of (1) obtains substrate and cladding；(2) assembly；(3) composite billet is heated；(4) composite rolling；(5) (6) are quickly cooled down after rolling to batch.High strength anti-corrosion single-side stainless steel composite plate has high-intensitive, good plasticity and corrosion resistance, and comprehensive service performance is preferable.
Description
Technical field
The present invention relates to a kind of steel plate and its manufacturing method more particularly to a kind of composite plates and its manufacturing method.
Background technique
Stainless steel clad plate is that base and cladding are carried out metallurgical bonding under special process technical conditions, makes tool
There is the whole new material of special composite performance.It is corrosion-resistant, heat-resisting, resistance to that the alternative stainless steel of stainless steel clad plate gives full play to its
The performances such as hydrogen, wear-resisting, bright, while the properties such as intensity, processability, weldability that can have both carbon steel again, in certain fields
Have become irreplaceable material.
The technique of usual clad steel plate refers to the compound Explosion composite of solid-solid, Rolling compund, explosion-roll-bonding method, expansion
Welding is dissipated, liquid-solid compound casting composite algorithm, method for brazing, built-up welding composite algorithm, liquid-solid roll-bonding, reverse solidification are multiple
It is legal etc..Mutually for other purposes, better composite quality, more kinds, bigger specification may be implemented in Rolling compund,
Theoretically roll-bonding method is more easily implemented large-scale industrial production.Actually since the thirties in last century, Rolling compund
Technology is just in continuous Development Practice.Due to material, design, the limitation of process-technology-evolutions, domestic mass production clad steel plate
Mainly or based on explosion cladding process.In recent years, since China integrally rolls the promotion of equipment, the depth of technical research
Enter, the production of the products such as big thickness steel plate, stainless steel and carbon steel Heterogeneous Composite plate has successfully been carried out using Rolling compund technology.
Especially the production development of the compound roll bending product of stainless steel, such product technology are rarely reported in foreign countries, also there are no practical production
Product occur, and domestic Related product technical research and production already stride forward international pioneering field.
Stainless steel clad plate in the prior art, some presence lead to stainless steel cladding due to the improper of production technology
There is apparent Carbide Precipitation, cladding intergranular corrosion resistance performance is insufficient；And other are then in order to guarantee the corrosion resistance of cladding, use
The techniques such as high-temperature final rolling cause material the relatively low situation of yield strength occur.
Meanwhile in the prior art, the production of roll bending compound for single side, at present relatively conventional production method be using pair
The mode of assembly is claimed to carry out, i.e., upper and lower two block welding is good single-side stainless steel composite billet, by the spraying point of stainless steel cladding
From agent, then it is superimposed welding, completes rolling, trimming and separation.This method production process is complicated, and high production cost, production efficiency
It is low, lumber recovery is also low, the product produced does not have sufficient competitiveness on the market.The prior art relates to a kind of heat company
Milling train group produces the manufacturing method of single side stainless steel clad plate, but the low-carbon steel grade that the technique is Q195 mainly for substrate,
The composite material yield strength of production is lower than 300MPa.
Based on this, it is expected that obtaining a kind of single-side stainless steel composite plate, single side composite rolling technology is used to be made, this is stainless
Steel composite board intensity with higher, good plasticity and corrosion resistance, to expand stainless steel clad plate application field, and are saved
Raw material alloy resource is saved, use cost is reduced.
Summary of the invention
One of the objects of the present invention is to provide a kind of high strength anti-corrosion single-side stainless steel composite plate, the stainless steel clad plates
By rationally designing each chemical element of composite plate base, so that stainless steel clad plate intensity obtained is high, corrosion resistance is strong, fit
It closes and is applied to such as building, pipeline, storage tank, environmental sanitation vehicles field.
To achieve the goals above, the invention proposes a kind of high strength anti-corrosion single-side stainless steel composite plates comprising base
Plate and single side Rolling compund are in the stainless steel cladding of substrate surface；The chemical element mass percent of the substrate are as follows:
C:0.02~0.10%, 0 < Si≤0.20%, Mn:0.2~1.0%, Al:0.02~0.06%, Ti:0.02~
0.06%, Nb:0.005~0.020%, N:0.003~0.008%, surplus are iron and other inevitable impurity.
In technical solutions according to the invention, the high strength anti-corrosion single-side stainless steel composite plate includes substrate and not
Rust steel cladding, wherein the stainless steel in the prior art for meeting country or international standard can be used in stainless steel cladding, and ingredient is not
Do particular determination.And high strength anti-corrosion of the present invention each chemical element design principle of substrate in single-side stainless steel composite plate
It is as described below:
C: carbon is to ensure that one of key element of armor plate strength.The raising of carbon content can be such that the intensity of steel and hardness rises,
The decline of plasticity toughness.However, should consider in the production process of the rolling high strength anti-corrosion single-side stainless steel composite plate
Influence of the carbon to substrate performance considers to influence caused by diffusive migration of the carbon to stainless steel cladding when Rolling compund again.And
For the stainless steel cladding for needing good corrosion resistance, its own carbon content is lower, its general mass percent is lower than
0.07%, so the carbon content of substrate should not be too high.It is compound in high strength anti-corrosion single-side stainless steel of the present invention based on this
The mass percent of carbon is limited to 0.02-0.10% in the substrate of plate, so that it is corrosion proof to stainless steel cladding to reduce carbon to the greatest extent
It influences, while also ensuring the mechanical property and welding performance of substrate.
Si: silicon is added in steel can improve purity of steel and deoxidation.In addition, silicon plays solution strengthening effect, but matter in steel
The excessively high silicon of amount percentage is unfavorable for welding performance.In addition, it is contemplated that also there is a certain amount of silicon in stainless steel cladding, thus,
In technical solutions according to the invention, 0 < Si≤0.20% is limited to the mass percent of silicon, so that in the quality
Silicon in percentage range will not have any influence to stainless steel cladding corrosion resistance, and substrate is made to have good weldability
Energy.
Mn: raising is essentially consisted in the purpose that manganese is added in single-side stainless steel composite plate in high strength anti-corrosion of the present invention
The additional amount of the intensity of steel, manganese depends primarily on the intensity rank of steel.But the excessively high plasticity that can reduce steel of the mass percent of manganese.
In addition, manganese is gone back in steel and aluminium plays the role of deoxidation together, and the deoxidation of manganese can promote the useful effect of titanium.Thus,
High strength anti-corrosion of the present invention is limited to 0.2 with the mass percent for controlling manganese in the substrate of single-side stainless steel composite plate~
1.0%.
Al: in technical solutions according to the invention, Al is strong deoxidant element.In addition, in aluminium and steel extra after deoxidation
Nitrogen can form AlN precipitate, be conducive to refine steel autstenitic grain size, improve hardness of steel.In order to guarantee in steel
Oxygen content is low as best one can, to the mass percent of aluminium in the substrate of high strength anti-corrosion of the present invention single-side stainless steel composite plate
Control is 0.02~0.06%.
Ti: titanium is carbide, and suitable titanium is added in steel and is conducive to the nitrogen fixed in steel, the TiN of formation
Composite plate base's austenite grain in heating of plate blank can be made not grow up excessively, be conducive to refine original austenite grains degree.Titanium
It can also be respectively with carbon and vulcanization symphysis at TiC, TiS, Ti in steel4C2S2Deng being deposited in the form of field trash and second phase particles
?.The above-mentioned Carbonitride Precipitation of titanium is grown up and is had to prevention heat affected area crystal grain when preventing the high-temperature region rolling crystal grain from growing up and weld
Obvious effect.Therefore, to the quality percentage of titanium in substrate of the high strength anti-corrosion of the present invention with single-side stainless steel composite plate
Than controlling 0.02~0.06%.
Nb: niobium is carbide, and a small amount of niobium is added in substrate primarily to improving recrystallization temperature, matches
Higher finishing temperature in symphysis production. art, prevent crystal grain is from growing up rapidly after recrystallizing rolling for substrate, favorably
In the mechanical property of substrate.Thus, to niobium in substrate of the high strength anti-corrosion of the present invention with single-side stainless steel composite plate
Mass percent is controlled 0.005~0.020%.
N: nitrogen mainly generates second phase particles with titanium, aluminium, refines crystal grain, improves intensity.When the mass percent of N is lower than
0.003%, then TiN or AlN precipitate is very little, and the requirement of refinement crystal grain is not achieved.However, when the mass percent of N is excessively high,
The TiN amount then generated is too big and particle is excessively coarse, will affect high strength anti-corrosion single-side stainless steel composite plate of the present invention
Substrate plasticity.Therefore, substrate controls 0.003~0.008% the mass percent of nitrogen.
Phosphorus is the harmful element in steel, the serious plasticity and toughness for damaging steel plate.Sulphur in steel then with the element compounds such as manganese
Plastic occluded foreignsubstance manganese sulfide is formed, it is especially unfavorable to the horizontal plastic property of steel and toughness, therefore, for technical solution of the present invention
Speech, p and s are inevitable impurity element, and the lower mass percent should be the better, it is contemplated that the actual steel-making of steel mill
Therefore level controls the mass percent of P, S in P≤0.02%, S≤0.015% in technical solutions according to the invention.
It should be noted that in technical solutions according to the invention, in substrate and stainless steel cladding compound interface in thickness
The difference on direction due to substrate and the constituent content of stainless steel cladding is spent, thus causes the higher element of content lower to content
Side diffusion motion, thus, form the transition zone for going deep into two sides respectively in about 0-50 μ m, transition zone each element it is average at
Divide the transition in gradient between this element among corresponding base's ingredient and cladding ingredient.Such as: in stainless steel cladding side
The higher alloying element of mass percent such as Cr, Ni is spread to base side, and the higher carbon member of the mass percent in substrate
Element is spread to cladding side, and the average assay of C, Cr, Ni element in transition zone is among stainless steel cladding and substrate.
Further, in high strength anti-corrosion of the present invention in single-side stainless steel composite plate, the stainless steel cladding is
Austenitic stainless steel.
Further, in high strength anti-corrosion of the present invention in single-side stainless steel composite plate, the austenitic stainless steel
For Cr-Ni system stainless steel or Cr-Ni-Mo system stainless steel.
Further, in this hair high strength anti-corrosion in single-side stainless steel composite plate, the thickness of the stainless steel cladding
Degree is 0.3-2mm.The considerations of comprehensively considering the performance and production cost of stainless steel clad plate, technical solutions according to the invention
By the thickness control of stainless steel cladding in 0.3-2mm.
Further, in high strength anti-corrosion of the present invention in single-side stainless steel composite plate, microcosmic group of the substrate
It is woven to ferrite+pearlite, Phase Proportion≤30% of medium pearlite.
It should be noted that transition zone is by 0-100 μm on substrate-side thickness direction in technical solutions according to the invention
Carbon-poor area caused by diffusion in range there are carbon, so as to form the ferrite area with a thickness of 50-100 μm, and in mistake
Cross Cr depletion zone caused by the layer diffusion that there are chromium and other elements to base close in the 0-20 μ m of stainless steel cladding side, but its
Microstructure is still austenite.
Further, in high strength anti-corrosion of the present invention in single-side stainless steel composite plate, yield strength 300-
450MPa。
Correspondingly, another object of the present invention is to provide the manufactures of single-side stainless steel composite plate of above-mentioned high strength anti-corrosion
Method is controlled under cooling process conditions using controlled rolling, so that above-mentioned high strength anti-corrosion is with single-side stainless steel composite plate higher
Finishing temperature under the conditions of obtain tiny crystal grain, to guarantee its yield strength with 300MPa or more.
To achieve the goals above, the invention proposes above-mentioned high strength anti-corrosions with the manufacturer of single-side stainless steel composite plate
Method, comprising steps of
(1) substrate and cladding are obtained；
(2) assembly；
(3) heat composite billet: heating temperature is 1180-1260 DEG C；
(4) composite rolling: hot continuous rolling finish rolling finishing temperature is controlled at 880 DEG C -960 DEG C；
(5) be quickly cooled down after rolling: cooling rate is not less than 30 DEG C/s；
(6) it batches.
In manufacturing method of the present invention, prior art acquisition is can be used in cladding, for example, by using Cr-Ni or Cr-Ni-
Mo series austenitic stainless steel is cut through steel-making, continuous casting, rolling, solid solution and scale, the scale clad sheet steel that assembly uses is made in pickling,
Its ingredient, performance and surface meet the requirement of respective country or international standard.
In addition, the heating temperature of composite billet is limited to 1180- in step (3) in manufacturing method of the present invention
1260 DEG C, be because ferrite is further transformed to austenite within this temperature range in one side cladding, to obtain uniform
Austenitizing tissue, the compound for being on the other hand conducive to alloying element such as niobium, titanium in substrate etc. is completely or partially molten
Solution.And the control of hot continuous rolling finish rolling finishing temperature is at 880 DEG C -960 DEG C, is to be higher than cladding stainless steel Carbide Precipitation temperature
And it is rolled close to base's austenite recrystallization temperature section.
In addition, in step (5) cooling rate be not less than 30 DEG C/s, be because after rolling be quickly cooled down in, in cladding not
Rust steel carbide has little time to be precipitated, and corrosion resistance is guaranteed, and for substrate, austenite recrystallization crystal grain is through fast
Quickly cooling but after, fine grain is kept down.
Further, in manufacturing method of the present invention, in the step (1), base's steel billet is first obtained, by base
Layer steel billet is as substrate to carry out assembly with cladding in the next steps；Or base's steel will be obtained after base's steel billet split rolling method
Plate, using the Substrate sheet as substrate to carry out assembly with cladding in the next steps.
It should be noted that substrate uses after both being directly casting continuously to form steel billet after Fruit storage, can also will connect
Slab split rolling method after steel plate at using.In some preferred embodiments, it is rolled into after being casting continuously to form steel billet or rolling-cogging
It is pre-processed before the substrate assembly of steel plate, to guarantee there is no any pollution on composite surface.
Further, in manufacturing method of the present invention, in the step (6), control coiling temperature be 550~
700℃。
In above scheme, coiling temperature range is controlled in 550~700 DEG C of avoidable cladding austenitic stainless steels in sensitized zone
Interior long-time stops, to ensure the corrosion resistance of cladding stainless steel.
Further, in manufacturing method of the present invention, in the step (6), control coiling temperature be 550~
650℃。
High strength anti-corrosion of the present invention is with single-side stainless steel composite plate by using a kind of chemistry of the low-carbon titaniferous containing niobium
Component system, to ensure that the higher austenite recrystallization temperature of substrate, while difficult to understand under the conditions of higher finishing temperature
Family name's body crystal grain will not sufficiently grow up, and then can obtain tiny crystal grain after ensuring substrate rapid cooling, so that final composite plate
Possess the yield strength of 300MPa or more.
In addition, the manufacturing method of high strength anti-corrosion of the present invention single-side stainless steel composite plate is using high-temperature final rolling, fast
Quickly cooling but and low-temperature coiling processes, avoids Carbide Precipitation, ensures that stainless steel cladding has excellent resistance to intergranular rotten
Corrosion energy.
In addition, high strength anti-corrosion of the present invention is with single-side stainless steel composite plate due to intensity with higher, good
Plasticity and corrosion resistance, thus its synthesis service performance is preferable, meets the use in the fields such as building, pipeline, storage tank, environmental sanitation vehicles
It is required that having the wider scope of application.
Detailed description of the invention
Fig. 1 is the substrate microstructure metallograph in the high strength anti-corrosion single-side stainless steel composite plate of embodiment 3.
Fig. 2 is that the stainless steel cladding microstructure metallographic in the high strength anti-corrosion single-side stainless steel composite plate of embodiment 3 shines
Piece.
Fig. 3 is the transition zone microstructure metallograph in the high strength anti-corrosion single-side stainless steel composite plate of embodiment 3.
Specific embodiment
Below in conjunction with Figure of description and specific embodiment to a kind of high strength anti-corrosion of the present invention with single side not
Rust steel composite board and its manufacturing method make further explanation, however the explanation and illustration is not to technology of the invention
The improper restriction of forecast scheme configuration.
Embodiment 1-8 and comparative example 1-2
Table 1 lists each in the high strength anti-corrosion single-side stainless steel composite plate and the composite plate of comparative example 1-2 of embodiment 1-8
Chemical element mass percent.
Table 1. (wt%, surplus are Fe and other inevitable impurity other than P, S)
Note: the steel trade mark, yuan quality used by cladding 304L, 316L in table 1,304, Q235B and Q195 are indicated
Amount percentage meets the range of corresponding prescribed by standard.
The high strength anti-corrosion of embodiment 1-8 is made with single-side stainless steel composite plate using following step: (1) obtaining substrate and answer
Layer, wherein substrate is used according to chemical element component proportion metallurgy and foundry base steel billet listed by table 1.Substrate can directly adopt
Cast base's steel billet, or Substrate sheet will be obtained after resulting base's steel billet cogging, using the Substrate sheet as substrate with
Assembly is carried out with cladding in subsequent step；
(2) assembly；
(3) heat composite billet: heating temperature is 1180-1260 DEG C；
(4) composite rolling: hot continuous rolling finish rolling finishing temperature is controlled at 880 DEG C -960 DEG C；
(5) be quickly cooled down after rolling: cooling rate is not less than 30 DEG C/s；
(6) batch: control coiling temperature is 550~700 DEG C.
It should be noted that comparative example 1 is market institute sampling plate, its unknown technological parameter；Comparative example 2 is that domestic patent is public
The number of opening is the embodiment data in CN102553919.
Table 2 lists the concrete technology in the manufacturing method of the high strength anti-corrosion single-side stainless steel composite plate of embodiment 1-8
Parameter.
Table 2.
The high strength anti-corrosion of embodiment 1-8 is subjected to mechanics with single-side stainless steel composite plate and the composite plate of comparative example 1-2
Tensile property test, cladding spot corrosion test and corrosion among crystalline grains test, wherein mechanical stretch performance test is according to GB/T
6396-2008 clad steel plate mechanics and technological property test method carry out；Cladding spot corrosion is tested according to GB/T 17899-
1999 stainless steel pitting potential measurement methods carry out, and corrosion among crystalline grains test is according to ASTM G108-94 (2010 check and approve again)
" electrochemistry reactivation property (EPR) test method of detection AISI 304 and 304L type stainless steel sensitization tendency " carries out.Test knot
Fruit is listed in Table 3 below.
Table 3
Note: "-" expression does not carry out correlated performance test in table 3.
As can be seen from Table 3, using the manufacturing method of high strength anti-corrosion of the present invention single-side stainless steel composite plate
Embodiment 1-8, high strength anti-corrosion is 300-450MPa with the yield strength of single-side stainless steel composite plate, and cladding spot corrosion is tested
And intercrystalline corrosion test result is excellent in, and has preferable corrosion resistance.Although comparing comparative example 1 as can be seen that its surrender
Intensity and this case implementation result are close, however much not as good as each embodiment of this case in the performance of its corrosion resisting property.In addition, comparative example 2
Mechanical stretch performance also not as good as each embodiment of this case.
In conjunction with table 1 to table 3 as can be seen that the high-strength durable single-side stainless steel composite plate of embodiment 1-8 is by using low-carbon
Chemical component system of the titaniferous containing niobium, ensure that the higher austenite recrystallization temperature of substrate, while in higher finishing temperature
Under the conditions of austenite grain will not sufficiently grow up, ensure that substrate be quickly cooled down after can obtain tiny crystal grain, to make
The composite plate for obtaining final finished possesses the yield strength of 300MPa or more.Further, since using high-temperature final rolling, rapid cooling and low
The technique that warm rolling takes, thus the precipitation of carbide is avoided, to ensure that stainless steel cladding has excellent intergranular corrosion resistance
Performance.
Fig. 1 is the substrate microstructure metallograph in the high strength anti-corrosion single-side stainless steel composite plate of embodiment 3.
As shown in Figure 1, the high strength anti-corrosion of embodiment 3 is ferrite with the substrate microstructure in single-side stainless steel composite plate
+ pearlite, Phase Proportion≤30% of medium pearlite.
Fig. 2 is that the stainless steel cladding microstructure metallographic in the high strength anti-corrosion single-side stainless steel composite plate of embodiment 3 shines
Piece.
As shown in Fig. 2, the high strength anti-corrosion of embodiment 3 is with the stainless steel cladding microstructure in single-side stainless steel composite plate
Austenite.
Fig. 3 is the transition zone microstructure metallograph in the high strength anti-corrosion single-side stainless steel composite plate of embodiment 3.
As shown in figure 3, embodiment 3 high strength anti-corrosion in the transition zone in single-side stainless steel composite plate, transition zone leans on
Carbon-poor area caused by diffusion on substrate-side thickness direction in 0-100 μ m there are carbon, so as to form with a thickness of 50-
100 μm of ferrite area I, and there are chromium and other elements to base close in the 0-20 μ m of stainless steel cladding side in transition zone
Diffusion caused by Cr depletion zone II, the microstructure in the region is still austenite.
It should 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 real
Example is applied, there are many similar variations therewith.If those skilled in the art directly exported from present disclosure or
All deformations associated, are within the scope of protection of the invention.
Claims (10)
1. a kind of high strength anti-corrosion single-side stainless steel composite plate comprising substrate and single side Rolling compund are in the stainless of substrate surface
Steel cladding；It is characterized in that, the chemical element mass percent of the substrate are as follows:
C:0.02~0.10%, 0 < Si≤0.20%, Mn:0.2~1.0%, Al:0.02~0.06%, Ti:0.02~
0.06%, Nb:0.005~0.020%, N:0.003~0.008%, surplus are iron and other inevitable impurity.
2. high strength anti-corrosion as described in claim 1 single-side stainless steel composite plate, which is characterized in that the stainless steel cladding is
Austenitic stainless steel.
3. high strength anti-corrosion as described in claim 1 single-side stainless steel composite plate, which is characterized in that the austenitic stainless steel
For Cr-Ni system stainless steel or Cr-Ni-Mo system stainless steel.
4. high strength anti-corrosion as described in claim 1 single-side stainless steel composite plate, which is characterized in that the stainless steel cladding
With a thickness of 0.3-2mm.
5. high strength anti-corrosion as described in claim 1 single-side stainless steel composite plate, which is characterized in that microcosmic group of the substrate
It is woven to ferrite+pearlite, Phase Proportion≤30% of medium pearlite.
6. high strength anti-corrosion as described in claim 1 single-side stainless steel composite plate, which is characterized in that its yield strength is 300-
450MPa。
7. the manufacturing method of the high strength anti-corrosion single-side stainless steel composite plate as described in any one of claim 1-6, special
Sign is, comprising steps of
(1) substrate and cladding are obtained；
(2) assembly；
(3) heat composite billet: heating temperature is 1180-1260 DEG C；
(4) composite rolling: hot continuous rolling finish rolling finishing temperature is controlled at 880 DEG C -960 DEG C；
(5) be quickly cooled down after rolling: cooling rate is not less than 30 DEG C/s；
(6) it batches.
8. manufacturing method as claimed in claim 7, which is characterized in that in the step (1), base's steel billet is first obtained, it will
Base's steel billet is as substrate to carry out assembly with cladding in the next steps；Or base's steel will be obtained after base's steel billet cogging
Plate, using the Substrate sheet as substrate to carry out assembly with cladding in the next steps.
9. manufacturing method as claimed in claim 7, which is characterized in that in the step (6), control coiling temperature is 550
~700 DEG C.
10. manufacturing method as claimed in claim 9, which is characterized in that in the step (6), control coiling temperature is 550
~650 DEG C.
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| CN201710495538.8A CN109108071A (en) | 2017-06-26 | 2017-06-26 | A kind of high strength anti-corrosion single-side stainless steel composite plate and its manufacturing method |
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| CN113106327A (en) * | 2020-01-13 | 2021-07-13 | 宝山钢铁股份有限公司 | High corrosion-resistant strip steel and manufacturing method thereof |
| CN113442524A (en) * | 2021-06-18 | 2021-09-28 | 首钢集团有限公司 | Washing and sweeping vehicle shell plate and preparation method thereof |
| WO2023143290A1 (en) * | 2022-01-26 | 2023-08-03 | 宝山钢铁股份有限公司 | High-strength pipeline resistant to aluminum sulfate corrosion and fabrication method therefor |
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