CN107429365A - The method for producing the pipe of two phase stainless steel - Google Patents
The method for producing the pipe of two phase stainless steel Download PDFInfo
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- CN107429365A CN107429365A CN201680017105.5A CN201680017105A CN107429365A CN 107429365 A CN107429365 A CN 107429365A CN 201680017105 A CN201680017105 A CN 201680017105A CN 107429365 A CN107429365 A CN 107429365A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
- C21D8/105—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
- B21C1/22—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Fuel-Injection Apparatus (AREA)
- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
This disclosure relates to a kind of method for the pipe for producing two phase stainless steel, is especially suitable for the two phase stainless steel used in the fuel injection system in the combustion chamber for injecting fuel into internal combustion engine.
Description
Technical field
This disclosure relates to a kind of method for the pipe for producing two phase stainless steel, is particularly suitable for for injecting fuel into
The two phase stainless steel used in fuel injection system in the combustion chamber of internal combustion engine.
Background technology
It is related to the design of gasoline in-cylinder direct-jet (GDI) system for auto industry, it has been suggested that to use two phase stainless steel
For track, the track is used to guide fuel injection in the combustion chamber of internal combustion engine.
Several requirements for the pipe as GDI tracks be present, and pair for requiring to use in this application in design
It must be considered during phase stainless steel.It is important, therefore, that two-phase stainless is selected in combination with the pipe manufacturing process properly selected
The chemical composition of steel, this causes predetermined austenite/ferrite ratio, it is desirable to corrosion resistance (resistance in general corrosion and support
The resistance of pitting corrosion), the microstructure substantially without intermetallic phase, particularly sigma phase and chromium nitride, predetermined rushes
Hit toughness, predetermined tensile strength and predetermined fatigue strength.In addition, the mechanical performance of dual phase steel should cause obtained pipe will
It is presented predetermined burst pressure, i.e. the internal pressure untill failure, the burst pressure is when the wall thickness of pipe is relatively small pair
It is also sufficiently high in contemplated application, therefore realize the GDI tracks of the space for requiring smaller and weight.Corrosion and fatigue behaviour should
Ensure patience of the pipe with the time.
Therefore the design and producing hypothesis of two phase stainless steel meets the technique of the pipe of the two phase stainless steel of the requirement of GDI tracks
It is complicated task.Selected chemical composition and processing parameter must adjust toward each other.Therefore, once name is chemical
Composition has been decided to be for two phase stainless steel, then processing parameter also must be on this selection.The chemistry of two phase stainless steel
Composition should also promote cost-effective production technology.In other words, chemical composition should not make it that overcomplicated, power consumption or consumption will be required
When production stage.
It is the method for the pipe for proposing production two phase stainless steel in terms of the disclosure, methods described realizes the two-phase stainless
The production of the pipe of steel, the pipe of the two phase stainless steel, which is presented, makes the pipe be suitable for existing for corrosion resistance (resistance general corrosion
And the resistance of resistance spot corrosion), predetermined impact flexibility, the high request of predetermined tensile strength and predetermined fatigue strength
Application performance.
One this application is for guiding fuel injection to the GDI tracks in the combustion chamber of internal combustion engine.The two-phase of the pipe
Stainless steel should be presented substantially without intermetallic phase, the particularly microstructure of sigma phase and chromium nitride.The change of two phase stainless steel
Study a point cost-effective production for the pipe that two phase stainless steel should be realized in terms of the effective processing step of use cost is promoted.
The content of the invention
The aspects described above realizes that present disclose provides the method for the pipe of production two phase stainless steel, institute by the disclosure
Stating the pipe of two phase stainless steel includes following component, in units of percentage by weight (wt%),
C maximums 0.06；
Cr 21-24.5；
Ni 2.0-5.5；
Si maximums 1.5；
Mo 0.01–1.0；
Cu 0.01-1.0；
Mn maximums 2.0；
N 0.05–0.3；
P maximums 0.04；
S maximums 0.03；With
The Fe of aequum and inevitable impurity, and with least 23.0 PRE values, wherein methods described including with
Lower step：
A) fused mass of two phase stainless steel is provided；
B) from the body of fused mass Cast Duplex Stainless Steel；
C) rod is formed by the body；
D) by generated in rod hole and by rod into pipe；
E) diameter and/or wall thickness of hot-extrudable reduction pipe are passed through；
F) diameter and/or wall thickness of pipe are further reduced by cold deformation；With
G) pipe of cold deformation is annealed；
Wherein after step g), the two phase stainless steel of the pipe obtained is by 40% to 60% austenite and 40% to 60%
Ferrite is formed, and wherein step g) include making the temperature that the pipe is subjected in the range of from 950 DEG C to 1060 DEG C reach from
The period of 0.3 to 10 minute, and the atmosphere being made up of admixture of gas is subjected to, the admixture of gas includes 1% to 6%
The nitrogen of percent by volume, and residue is H2Or inert gas.
Consequently, it was found that to be optimal the annealing temperature of material property, annealing time and annealing atmosphere.Have found annealing
Temperature should be in the range of from 950 DEG C to 1060 DEG C, and atmosphere should include following admixture of gas, i.e., described admixture of gas bag
The nitrogen of 1% to 6% percent by volume is included, and it is remaining from H2Or inert gas selection, and annealing should be from 0.3 to 10 minute
Performed in period.
If using lower annealing temperature, the risk for forming undesirable precipitation, such as intermetallic phase be present.Separately
Outside, recrystallization will be slower, and therefore will require elevated soak time to complete to recrystallize, therefore have for productivity ratio negative
Influence.
In principle, the temperature upper limit of annealing steps is set the temperature for starting fusing by two phase stainless steel.However, also deposit
Annealing temperature should be further restricted it is actual the reason for.At the high temperature in the section than being provided, two phase stainless steel will
Become softer, this will increase the risk damaged during annealing steps.Under high-temperature, grain growth will also increase, so that
It must be more difficult to obtain good technique and crystallite dimension control.Also it is very important that using will balance phase fraction annealing temperature
Degree, too low temperature will cause too low ferrite content, and too high temperature will provide too high ferrite content.Annealing step
Rapid temperature will also influence the chemical composition of ferritic phase and austenite phase, thus annealing temperature need together with chemical composition by
Balance, to ensure the two mutually by with good corrosion resistance.
The period that pipe is subjected to annealing temperature should be between 0.3 to 10 minute, such as 0.3 to 5 minute, such as 0.3 to 2.5
Minute.Time period needs to be enough to grow, to ensure fully to recrystallize.If however, the period is long, obtained
Pipe will have coarse structure, this will for mechanical performance have negative effect.The thickness of tube wall is bigger, then annealing time is got over
It is long.Contemplate from about 1mm up to about 5mm wall thickness.
In addition, the atmosphere of annealing steps is extremely important.Atmosphere including nitrogen by influence two phase stainless steel surface in nitrogen
Content.Therefore, the effect of the nitrogen in atmosphere is to maintain the nitrogen content of the material at surface.Under the annealing temperature of this method,
Nitrogen will diffuse into material and be diffused out from material.Nitrogen content should be chosen such that the nitrogen content maintained in surface.Have found it
By the net loss of the nitrogen caused in surface, this will negatively influence such as upper too low nitrogen content in the middle atmosphere for performing annealing
Literary or defined two phase stainless steel below corrosion resistance and mechanical performance.Have found in the atmosphere for wherein performing annealing
Too high nitrogen level will cause the increase of nitrogen during annealing in the surface of material, and because nitrogen is strong austenitic formation agent
(former), so therefore the change of nitrogen content may influence to balance each other.Therefore, the nitrogen of the high content in atmosphere will be in order in table
Austenite is formed in face and is provided.Nitrogen content in the surface of material will be also influenceed relative to forming precipitation, such as chromium nitride
The structural stability of sensitiveness.The formation of precipitation is by for such as hereinbefore or the corrosion resistant of two phase stainless steel that is defined below
Corrosion has negative effect.
Resistance to spot corrosion equivalent PRE is defined as PRE=Cr (percentage by weight)+3.3Mo (percentage by weight)+16N
(percentage by weight).At least about 23.0 PRE instructions, by composition defined above, whole three in chromium, molybdenum and nitrogen are not
Allow to be in its minimum value simultaneously, but must combine so that PRE values defined in acquisition.According to another embodiment, PRE values
It is at least about 24.0.As hereinbefore and be used below term " about " instruction integer ± 10%.
According to one embodiment, (step g) temperature range is from 970 DEG C to 1040 DEG C for annealing steps.Implemented according to another
Example, the temperature range is from 1000 DEG C to 1040 DEG C.
According to one embodiment, the annealing steps include make the pipe be subjected to the temperature reach from 0.5 to 5 minute when
Between section, such as from period of 0.5 to 1.5 minute.
According to one embodiment, inert gas is argon or helium or its mixture.
According to one embodiment, content of the nitrogen in admixture of gas is less than or equal to 4% percent by volume.According to another
One embodiment, content of the nitrogen in the admixture of gas are less than or equal to 3% percent by volume.According to another embodiment,
Content of the nitrogen in the admixture of gas is greater than or equal to 1.5% percent by volume.
According to one embodiment, (step e) includes making 1100 DEG C to 1200 DEG C of the Guan Cong's the hot-extrudable step
At a temperature in the range of be subjected to hot-extrudable, and be subjected to subtracting in the cross-sectional area from the pipe in the range of 92% to 98%
It is small.According to one embodiment, (step e) includes making in the range of 1100 DEG C to 1170 DEG C of the Guan Cong for the hot-extrudable step
At a temperature of be subjected to hot-extrudable, and be subjected to from the reduction of the cross-sectional area of the pipe in the range of 92% to 98%.It is transversal
Face area, which reduces, to be defined as：((pipe) cross-sectional area before extrusion subtracts cross-sectional area after extrusion)/(
Cross-sectional area before extrusion).The selection of chemical composition of extrusion temperature and degree of deformation on two phase stainless steel so that it does not have
Have for the microstructure of two phase stainless steel adverse effect or will not result in crackle in two phase stainless steel etc., the crackle pair
In the mechanical performance of final products will be harmful.
According to one embodiment, cold deformation step (step f) is included in pipe is not preheated in the case of Guan Jing is cooled change
Shape.According to one embodiment, (step f) includes making the pipe be subjected in the range of 50% to 90% the cold deformation step
The cross-sectional area of pipe reduces.Cross-sectional area, which reduces, to be defined as：((the pipe before Pi Geershi tube rollings (pilgering)
) cross-sectional area subtracted in the cross-sectional area after Pi Geershi tube rollings)/(cross section before Pi Geershi tube rollings
Area).The selection of chemical composition of two phase stainless steel is to realize this cold deformation of two phase stainless steel, and without undesirable in material
Crackle generation or any harmful negative effect of the microstructure for material.
According to such as above or method following by definition one embodiment, cold deformation is Pi Geershi tube rollings or cold
Draw.
According to one embodiment, when cold deformation is Pi Geershi tube rollings, the wall thickness in pipe reduces between external diameter reduction
Relation be expressed as Q values, wherein
Q- values=(Wallh-Wallt) * (Odh-Wallh)/Wallh ((Odh-Wallh)-(Odt-Wallt)), wherein
The thickness of the wall of Wallh=hollow walls=before Pi Geershi tube rollings
The thickness of the wall of Wallt=tube walls=after Pi Geershi tube rollings
The diameter of pipes of the hollow OD=of Odh=before Pi Geershi tube rollings
The diameter of pipes of the Odt=pipes OD=after Pi Geershi tube rollings, and wherein
Q is in the range of 0.5 to 2.5.If area reduction is too high, power may ftracture too high and material.
According to another embodiment, Q is in the range of 0.9 to 1.1.
According to one embodiment, the two phase stainless steel has following composition, in units of percentage by weight：
C 0.01-0.025；
Si 0.35-0.6；
Mn 0.8-1.5；
Cr 21-23.5；
Ni 3.0-5.5；
Mo 0.10–1.0；
Cu 0.15-0.70；
N 0.090–0.25；
P is less than or equal to 0.035；
S is less than or equal to 0.003；
The Fe of aequum and inevitable impurity.
Two phase stainless steel with this chemical composition is particularly suitable for being subjected to more than process described above parameter
Described processing step.In other words, as hereinbefore or processing step following by definition and parameter are selected as being particularly suitable for
In the two phase stainless steel with this chemical composition, and cause the pipe with following performance so that the pipe is particularly well suited as using
In the application for channeling fuel into the GDI tracks in fuel injection system, the fuel injection system is used to inject fuel into
In the combustion chamber of internal combustion engine.
According to another embodiment, pipe is for channeling fuel into the pipe in fuel injection system, the fuel injection systems
Unite for injecting fuel into the combustion chamber of internal combustion engine.The disclosure can be defined as production as replacement and be used for fuel injection
To the technique of the fuel guiding device (conductor) in the fuel injection system in the combustion chamber of internal combustion engine, wherein the technique
Including above and/or the following by definition method for being used to produce the pipe of two phase stainless steel.This technique is included by means of hard pricker
The pipe of two phase stainless steel is attached to the further structural elements of the internal combustion engine by weldering.Further structural elements can be metal,
Typically austenite or dual phase steel.The method of production pipe, include the selection of the chemical composition of two phase stainless steel, be also intended to realization
The low of fragility (LMIE) is induced with favourable brazeability energy, especially for liquid metal caused by being penetrated by liquid metal
The pipe of neurological susceptibility.Solder brazing includes copper brazing, be possibly in continuous smelting furnace in the range of from 1100 DEG C to 1140 DEG C
At a temperature of carry out.
According to one embodiment, after the Pi Geershi tube rollings step, pipe has in the range of from 15 to 35mm
External diameter.According to one embodiment, this effective guiding fuel injection that acts on is to the fuel injection systems in the combustion chamber of internal combustion engine
GDI tracks in system.
According to another embodiment, after the Pi Geershi tube rollings, pipe is with the external diameter from 7mm to 10mm.According to one
Individual embodiment, this effective guiding fuel injection that acts on is to the cartridge in the fuel injection system in the combustion chamber of internal combustion engine
Line.
Hereinbefore the function and effect with the necessary alloying element of two phase stainless steel following by definition will be with hypomeres
Provided in falling.The function of each alloying element and enumerating for effect are not regarded as completely, but entering for the alloying element may be present
One step function and effect.But, there is provided for the rudimentary knowledge being considered as when designing two phase stainless steel and for producing
The viewpoint of the technological parameter of the method for the pipe of the two phase stainless steel, the pipe of the two phase stainless steel are notably intended to guide fuel
Fuel in spraying system is for injecting fuel into the two-phase stainless pipe in the combustion chamber of internal combustion engine.
Carbon C has austenite stablizing effect and resisted in the deformation of two phase stainless steel from austenitic structure to martensite knot
The transformation of structure.C has good effect for the intensity of two phase stainless steel.Therefore, C content should be higher than that or equal to 0.01% weight
Percentage.However, under too high level, carbon tends to form undesirable carbide with other alloying elements.C content because
This should not be greater than 0.06% percentage by weight.According to one embodiment, C content should not be greater than 0.025% percentage by weight.
Chromium Cr has the strong influence of the corrosion resistance particularly spot corrosion for two phase stainless steel.According to the disclosure, PRE values
Higher than 23.0.In addition, Cr improves yield strength and resisted in the deformation of two phase stainless steel from austenitic structure to martensite
The transformation of structure.Therefore, Cr content should be higher than that or equal to 21.0% percentage by weight.At a high level, Cr increase contains
Amount causes the higher temperature of the sigma phase of undesirable stabilization and the more rapidly generation of sigma phase.Therefore, Cr contains
Amount is less than or equal to 24.5% percentage by weight.Cr also has the ferrite stablizing effect for two phase stainless steel.According to one
Embodiment, Cr content are less than or equal to 23.5% percentage by weight.
Nickel has good effect for the resistance for resisting general corrosion.Ni also have strong austenite stablizing effect and
Transformation of the resistance from austenitic structure to martensitic structure in the deformation of two phase stainless steel.Therefore Ni content is more than or equal to
2.0% percentage by weight.According to another embodiment, Ni content is more than or equal to 3.5% percentage by weight.To a certain degree
On, Ni austenite stablizing effect can be compensated by adjusting Cr contents.However, Ni content not should be greater than or equal to 5.5%
Percentage by weight.
Silicon Si is frequently present in two phase stainless steel, because silicon may have been used for the deoxidation of steel fused mass.Si is
Ferrite stabilizer (stabilizer), but also resist turn from austenite to martensite relevant with the deformation of two phase stainless steel
Become.Silicon also can improve corrosion resistance in some environment.However, Si reduces the solubility of nitrogen and carbon, and if with too high
Level is present, then is likely to form undesirable silicide.Therefore, according to one embodiment, contents of the Si in two phase stainless steel
No more than 1.5% percentage by weight.According to one embodiment, contents of the Si in two phase stainless steel is no more than 0.6% weight hundred
Divide ratio.According to one embodiment, Si content can as little as about 0% percentage by weight.According to one embodiment, Si content should be big
In or equal to 0.35% percentage by weight.
Molybdenum Mo has strong influence for the corrosion resistance of two phase stainless steel.Mo consumingly influences the PRE of two phase stainless steel.Mo
To be added more than or equal to the amount of 0.01% percentage by weight.Molybdenum also has the ferrite stablizing effect for two phase stainless steel.
According to one embodiment, Mo content is higher than 0.10% percentage by weight.Mo also increases undesirable sigma phase stabilization
Temperature, and promote the speed of the generation of sigma phase.Mo is also relatively expensive alloying element.Therefore, Mo content should be small
In or equal to 1.0% percentage by weight.
Copper Cu has the good effect for corrosion resistance.Cu also in the deformation of two phase stainless steel resistance from austenite to
The transformation of martensite.Therefore, Cu is deliberately alternatively added to two phase stainless steel.Often, Cu is in the discarded object for producing steel
Exist in product, and be allowed to be maintained in steel with medium level.According to one embodiment, Cu content can be more than or equal to
0.01% percentage by weight.According to another embodiment, Cu content is more than or equal to 0.15% percentage by weight.According to a reality
Example is applied, Cu content is less than or equal to 1.0% percentage by weight.According to another embodiment, Cu content is less than or equal to 0.7%
Percentage by weight.
Manganese Mn has strain hardening effect for two phase stainless steel, and is resisted in the deformation of two phase stainless steel from austenite
Transformation of the structure to martensitic structure.Mn also has austenite stablizing effect.According to one embodiment, Mn is in two phase stainless steel
Content should be higher than that or equal to 0.8% percentage by weight.Born however, Mn has for the corrosion resistance in acid and chloride environment
Face rings, and Mn increases the trend of the generation of intermetallic phase.Therefore, Mn maximum level should not be greater than 2.0% weight percent
Than.According to one embodiment, Mn content is less than or equal to 1.0% percentage by weight.
Nitrogen N has good effect for the corrosion resistance of two phase stainless steel and also contributed in strain hardening.N is rotten for resistance to point
Corrosion equivalent PRE has strong effect.N also has strong austenite stablizing effect, and in the plastic deformation of two phase stainless steel
When transformation of the resistance from austenitic structure to martensitic structure, and therefore added with 0.05% percentage by weight or higher amount.
According to one embodiment, N content should be greater than or equal to 0.090% percentage by weight.Under too high level, N tends to
Chromium nitride is formed in two phase stainless steel, the chromium nitride should be kept away due to it for the counter productive of ductility and corrosion resistance
Exempt from.Therefore, N content should be less than or equal to 0.3% percentage by weight.According to one embodiment, N content is less than or equal to
0.25% percentage by weight.
Phosphorus P is the impurity contained in two phase stainless steel, and well known P negatively influences hot workability.Therefore, P
Content be set in 0.03% percentage by weight or lower.
Sulphur S is the impurity contained in austenitic stainless steel, and hot workability will be deteriorated.Therefore, S's is admissible
Content is less than or equal to 0.03% percentage by weight, e.g., less than or equal to 0.005% percentage by weight.
As hereinbefore or hereinafter defined two phase stainless steel can selectively include from following group selection
One or more of following element：Al, V, Nb, Ti, O, Zr, Hf, Ta, Mg, Ca, La, Ce, Y and B.These elements can
Added during manufacturing process, to improve such as deoxidation, corrosion resistance, high-temperature ductility or machinability.However, such as in this area
In, it is known that these elements addition must depend on exist which kind of element and be limited.Therefore, if the additions of these elements
Total content is less than or equal to 1.0% percentage by weight.
Term " impurity " as being related to herein is intended to mean that in industrial production two phase stainless steel due to such as ore deposit
The raw material of stone and waste material and due to the various other factors in production technology will pollute two phase stainless steel material, and allow exist
Not negatively affect as above or in the range of two phase stainless steel defined hereinafter polluted.
Embodiment
The disclosure is furtherd elucidate by following non-limiting example.
Example
Two fused mass of the manufacture with following component：Fe is for both aequums.
| No | C | Si | Mn | P | S | Cr | Ni | Mo | Cu | N |
| 1 | 0.02 | 0.5 | 1.5 | <0.035 | <0.010 | 22.2 | 3.3 | 0.25 | 0.25 | 0.15 |
| 2 | 0.01 | 0.53 | 1.09 | 0.026 | <0.003 | 22.88 | 3.15 | 0.12 | 0.21 | 0.25 |
Then the fused mass obtained is processed accordingly：
The fused mass is cast into body by using continuously casting.
Then, pole is formed by forging, and then managed by being formed in pole internal drilling.Then the diameter of pipe passes through
It is reduced using hot-extrudable at a temperature of in the range of from 1120 DEG C to 1150 DEG C, the pipe obtained has 96% to 98%
Cross-sectional area reduce.It is hot-extrudable to pass behind acidleach (pickling) removal bead.
Diameter is further reduced by Pi Geershi tube rollings, and make that pipe is subjected in the range of 80% to 86% its is transversal
Face area reduces.
Annealed by the pipe of Pi Geershi tube rollings and then in the atmosphere being made up of admixture of gas, the admixture of gas
Include about 2% nitrogen, remaining is argon gas, and makes the temperature that pipe is subjected to about 1030 DEG C of about the period of 1 minute.
In Pi Geershi tube rolling steps, Q is about 1.0.
After annealing, obtained pipe is made to be subjected to straightening step.Aligning performs in roller straightener, and roller straightener has curved
Bent and ovalization combination.Pipe passes through a series of angled rollers, and the roller rotates pipe and applies a series of bending shiftings to pipe
It is dynamic.Exceed yield strength during aligning, to obtain the permanent change of shape, to obtain straight tube.
External diameter of the pipe with 30mm obtained, and the effective guiding fuel injection that acts on is in the combustion chamber of internal combustion engine
GDI tracks in fuel injection system.
An other pipe made of fused mass 1 manufactures also according to method disclosed above.Walked in Pi Geershi tube rollings
After rapid, this pipe is with the external diameter from 8mm.This pipe is also served as guiding fuel injection to the combustion in the combustion chamber of internal combustion engine
Expect the burning line in spraying system.
Claims (15)
1. a kind of method for the pipe for producing two phase stainless steel, the pipe of the two phase stainless steel includes following component, with weight percent
Than for unit,
C maximums 0.06；
Cr 21-24.5；
Ni 2.0-5.5；
Si maximums 1.5；
Mo 0.01–1.0；
Cu 0.01-1.0；
Mn maximums 2.0；
N 0.05–0.3；
P maximums 0.04；
S maximums 0.03；With
The Fe of aequum and inevitable impurity,
And there is at least 23.0 PRE values,
Wherein it the described method comprises the following steps：
A) fused mass of the two phase stainless steel is provided；
B) body of the two phase stainless steel is cast from the fused mass；
C) rod is formed by the body；
D) by generated in the rod hole and by the rod into pipe；
E) the hot-extrudable diameter and/or wall thickness for reducing the pipe is passed through；
F) diameter and/or wall thickness of the pipe are further reduced by cold deformation；With
G) pipe of cold deformation is annealed；
Wherein after the step g), the two phase stainless steel of the pipe obtained by 40% to 60% austenite and 40% to
60% ferrite is formed, and wherein described step g) includes making the pipe be subjected in the range of from 950 DEG C to 1060 DEG C
Temperature reaches the period from 0.3 to 10 minute, and is subjected to the atmosphere being made up of admixture of gas, and the admixture of gas includes
The nitrogen of 1% to 6% percent by volume, and residue is H2Or inert gas.
2. according to the method for claim 1, wherein the temperature range is from 970 DEG C to 1040 DEG C.
3. according to the method for claim 1, wherein the temperature range is from 1000 DEG C to 1040 DEG C.
4. the method according to any one of claims 1 to 3, wherein the annealing steps include making the pipe be subjected to institute
Temperature is stated up to the period from 0.5 to 5 minute.
5. the method according to any one of Claims 1-4, wherein the inert gas is argon or helium or its mixing
Thing.
6. the content of the method according to any one of claim 1 to 5, wherein nitrogen in the admixture of gas is small
In or equal to 4% percent by volume.
7. the content of the method according to any one of claim 1 to 6, wherein nitrogen in the admixture of gas is high
In or equal to 1.5% percent by volume.
8. the method according to any one of claim 1 to 7, wherein step e include making 1100 DEG C of the Guan Cong extremely
It is subjected to described hot-extrudable at a temperature of in the range of 1200 DEG C, and is subjected to from the cross-sectional area in the range of 92% to 98%
Reduce.
9. the method according to any one of claim 1 to 8, wherein step f include making the pipe in the feelings not preheated
Cold deformation is subjected under condition.
10. the method according to any one of claim 1 to 9, wherein step f include making the pipe be subjected to from 50%
Cross-sectional area in the range of to 95% reduces.
11. the method according to any one of claim 1 to 10, wherein the cold deformation is Pi Geershi tube rollings.
12. according to the method for claim 11, wherein in the Pi Geershi tube rollings step, subtract in the wall thickness of the pipe
Relation between small and external diameter reduces is expressed as Q values, wherein
Q- values=(Wallh-Wallt) * (Odh-Wallh)/Wallh ((Odh-Wallh)-(Odt-Wallt)), wherein
The thickness of the wall of Wallh=hollow walls=before Pi Geershi tube rollings
The thickness of the wall of Wallt=tube walls=after Pi Geershi tube rollings
The diameter of pipes of the hollow OD=of Odh=before Pi Geershi tube rollings
The diameter of pipes of the Odt=pipes OD=after Pi Geershi tube rollings,
And wherein Q is in the range of 0.5 to 2.5.
13. according to the method for claim 12, wherein Q is in the range of 0.9 to 1.1.
14. the method according to any one of claim 1 to 13, wherein the two phase stainless steel includes：With weight hundred
It is unit to divide ratio
C 0.01-0.025；
Si 0.35-0.6；
Mn 0.8-1.5；
Cr 21-23.5；
Ni 3.0-5.5；
Mo 0.10–1.0；
Cu 0.15-0.70；
N 0.090–0.25；
P is less than or equal to 0.035；
S is less than or equal to 0.003；
The Fe of aequum and inevitable impurity.
15. the method according to any one of claim 1 to 14, wherein the pipe is to be used to guide fuel injection system
In fuel to inject fuel into the pipe in the combustion chamber of internal combustion engine.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP15163187.6 | 2015-04-10 | ||
| EP15163187 | 2015-04-10 | ||
| PCT/EP2016/057831 WO2016162525A1 (en) | 2015-04-10 | 2016-04-08 | A method of producing a tube of a duplex stainless steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107429365A true CN107429365A (en) | 2017-12-01 |
Family
ID=52875572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680017105.5A Pending CN107429365A (en) | 2015-04-10 | 2016-04-08 | The method for producing the pipe of two phase stainless steel |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20180066331A1 (en) |
| EP (1) | EP3280826B1 (en) |
| JP (1) | JP6763876B2 (en) |
| KR (1) | KR20170133435A (en) |
| CN (1) | CN107429365A (en) |
| CA (1) | CA2979511C (en) |
| ES (1) | ES2788530T3 (en) |
| WO (1) | WO2016162525A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108251750A (en) * | 2018-03-30 | 2018-07-06 | 鞍钢股份有限公司 | A kind of nickel-saving type think gauge containing Cu two phase stainless steel and preparation method thereof |
| CN111850254A (en) * | 2020-08-17 | 2020-10-30 | 綦江重配齿轮有限公司 | Method for preventing spline shaft from medium-frequency quenching deformation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015226795A1 (en) * | 2015-12-29 | 2017-06-29 | Robert Bosch Gmbh | Component of a hydraulic device, in particular a fuel injection system for internal combustion engines |
| EP3397783A1 (en) * | 2015-12-30 | 2018-11-07 | Sandvik Intellectual Property AB | A process of producing an austenitic stainless steel tube |
| DE102016115550B4 (en) * | 2016-08-22 | 2018-05-30 | Benteler Automobiltechnik Gmbh | Process for producing a fuel distributor |
| WO2018114865A1 (en) * | 2016-12-21 | 2018-06-28 | Sandvik Intellectual Property Ab | An object comprising a duplex stainless steel and the use thereof |
| JP6369662B1 (en) * | 2017-01-10 | 2018-08-08 | Ｊｆｅスチール株式会社 | Duplex stainless steel and manufacturing method thereof |
| WO2018215466A1 (en) * | 2017-05-22 | 2018-11-29 | Sandvik Intellectual Property Ab | New duplex stainless steel |
| CN111051679A (en) * | 2017-09-14 | 2020-04-21 | 山特维克原料技术德国公开股份有限公司 | Dispenser fuel rail and method of manufacturing dispenser fuel rail |
| KR102324087B1 (en) | 2019-12-18 | 2021-11-10 | 한전원자력연료 주식회사 | Ferritic Alloy and Method for Manufacturing Nuclear Fuel Cladding Tube Using the Same |
| CN113652602A (en) * | 2021-07-07 | 2021-11-16 | 上海大学 | High-performance duplex stainless steel wire rope alloy material and preparation method thereof |
| JP7377942B2 (en) * | 2022-01-19 | 2023-11-10 | 三菱重工パワー環境ソリューション株式会社 | Heat exchanger and flue gas treatment equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63255322A (en) * | 1987-04-13 | 1988-10-21 | Kawasaki Steel Corp | Manufacture of seamless two-phase stainless steel tube |
| EP2038445A2 (en) * | 2006-06-16 | 2009-03-25 | Industeel Creusot | Duplex stainless steel |
| CN101633999A (en) * | 2009-05-26 | 2010-01-27 | 山西太钢不锈钢股份有限公司 | Austenitic stainless steel, steel tube thereof and manufacturing method thereof |
| CN101956142A (en) * | 2009-07-13 | 2011-01-26 | 苏州奕欣特钢管业有限公司 | Dual phase steel seamless pipe and processing method thereof |
| CN103361564A (en) * | 2013-07-16 | 2013-10-23 | 江苏银环精密钢管股份有限公司 | Super duplex stainless steel seamless steel tube and preparation method |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3271262B2 (en) * | 1994-12-16 | 2002-04-02 | 住友金属工業株式会社 | Duplex stainless steel with excellent corrosion resistance |
| JP3041050B2 (en) * | 1995-06-05 | 2000-05-15 | ポハング アイアン アンド スチール カンパニー リミテッド | Duplex stainless steel and its manufacturing method |
| JP3387385B2 (en) * | 1997-09-25 | 2003-03-17 | 住友金属工業株式会社 | Bright annealing method for duplex stainless steel |
| JP3632672B2 (en) * | 2002-03-08 | 2005-03-23 | 住友金属工業株式会社 | Austenitic stainless steel pipe excellent in steam oxidation resistance and manufacturing method thereof |
| KR20030011758A (en) * | 2002-12-28 | 2003-02-11 | 성장현 | Heat treatment method of high nitrogen duplex stainless steels |
| KR20100113642A (en) * | 2008-03-26 | 2010-10-21 | 닛폰 스틸 앤드 스미킨 스테인레스 스틸 코포레이션 | Low-alloy duplex stainless steel wherein weld heat-affected zones have good corrosion resistance and toughness |
| EP2314392B1 (en) * | 2008-06-13 | 2016-08-10 | Nippon Steel & Sumitomo Metal Corporation | Process for producing high-alloy seamless pipe |
| WO2010082395A1 (en) * | 2009-01-19 | 2010-07-22 | 住友金属工業株式会社 | Process for production of duplex stainless steel pipe |
| JP5360046B2 (en) * | 2010-12-28 | 2013-12-04 | 新日鐵住金株式会社 | Manufacturing method of hot extruded tube |
| JP5746893B2 (en) * | 2011-03-30 | 2015-07-08 | 新日鐵住金ステンレス株式会社 | Surface-treated duplex stainless steel and method for producing the same |
| FI126574B (en) * | 2011-09-07 | 2017-02-28 | Outokumpu Oy | Duplex stainless steel |
| JP5846555B2 (en) * | 2011-11-30 | 2016-01-20 | 国立研究開発法人物質・材料研究機構 | Nickel-free high-nitrogen stainless steel rolling / drawing method, nickel-free high-nitrogen stainless steel seamless tubule and method for producing the same |
| JP5865775B2 (en) * | 2012-03-16 | 2016-02-17 | 新日鐵住金株式会社 | Stainless steel for sintered exhaust gas dust collector and sintered exhaust gas dust collector |
-
2016
- 2016-04-08 ES ES16718275T patent/ES2788530T3/en active Active
- 2016-04-08 US US15/565,217 patent/US20180066331A1/en not_active Abandoned
- 2016-04-08 JP JP2017552813A patent/JP6763876B2/en active Active
- 2016-04-08 KR KR1020177031324A patent/KR20170133435A/en not_active Application Discontinuation
- 2016-04-08 CA CA2979511A patent/CA2979511C/en active Active
- 2016-04-08 CN CN201680017105.5A patent/CN107429365A/en active Pending
- 2016-04-08 WO PCT/EP2016/057831 patent/WO2016162525A1/en active Application Filing
- 2016-04-08 EP EP16718275.7A patent/EP3280826B1/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63255322A (en) * | 1987-04-13 | 1988-10-21 | Kawasaki Steel Corp | Manufacture of seamless two-phase stainless steel tube |
| EP2038445A2 (en) * | 2006-06-16 | 2009-03-25 | Industeel Creusot | Duplex stainless steel |
| CN101633999A (en) * | 2009-05-26 | 2010-01-27 | 山西太钢不锈钢股份有限公司 | Austenitic stainless steel, steel tube thereof and manufacturing method thereof |
| CN101956142A (en) * | 2009-07-13 | 2011-01-26 | 苏州奕欣特钢管业有限公司 | Dual phase steel seamless pipe and processing method thereof |
| CN103361564A (en) * | 2013-07-16 | 2013-10-23 | 江苏银环精密钢管股份有限公司 | Super duplex stainless steel seamless steel tube and preparation method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108251750A (en) * | 2018-03-30 | 2018-07-06 | 鞍钢股份有限公司 | A kind of nickel-saving type think gauge containing Cu two phase stainless steel and preparation method thereof |
| CN111850254A (en) * | 2020-08-17 | 2020-10-30 | 綦江重配齿轮有限公司 | Method for preventing spline shaft from medium-frequency quenching deformation |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3280826B1 (en) | 2020-03-18 |
| EP3280826A1 (en) | 2018-02-14 |
| CA2979511A1 (en) | 2016-10-13 |
| CA2979511C (en) | 2023-03-28 |
| JP6763876B2 (en) | 2020-09-30 |
| ES2788530T3 (en) | 2020-10-21 |
| KR20170133435A (en) | 2017-12-05 |
| WO2016162525A1 (en) | 2016-10-13 |
| JP2018513917A (en) | 2018-05-31 |
| US20180066331A1 (en) | 2018-03-08 |
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