CN109112278A - A kind of corrosion resistant alloy UNS S33400 cold-rolled strip manufacturing method, steel band and application - Google Patents
A kind of corrosion resistant alloy UNS S33400 cold-rolled strip manufacturing method, steel band and application Download PDFInfo
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- CN109112278A CN109112278A CN201710487672.3A CN201710487672A CN109112278A CN 109112278 A CN109112278 A CN 109112278A CN 201710487672 A CN201710487672 A CN 201710487672A CN 109112278 A CN109112278 A CN 109112278A
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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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
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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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0236—Cold rolling
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
- C23G1/081—Iron or steel solutions containing H2SO4
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
- C23G1/086—Iron or steel solutions containing HF
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/42—Heating elements having the shape of rods or tubes non-flexible
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Abstract
The invention discloses a kind of corrosion resistant alloy UNS S33400 cold-rolled strip manufacturing methods, and typical process flow is: raw material annealing, raw material pickling, rolling and bright annealing.950~1160 DEG C of annealing temperature, 5.0~12 ms/min of speed, in raw material pickling, using continuous acid-washing unit, pre- pickling+nitration mixture washes group technology, finished product rolling deformation rate 25~75%；Busbar bright annealing technology is carried out after rolling, uses ultra-pure hydrogen for the bright annealing machine furnace of protective atmosphere.Cold-rolled strip tensile strength >=540MPa of the invention, yield strength >=225MPa, elongation percentage >=35, hardness≤135.The steel band is additionally provided in the application in electrothermal tube field.The present invention produces high-quality, inexpensive UNS S33400 cold-rolled strip product, can meet the manufacturing technology requirement of electrothermal tube；It is applied by production domesticization, is conducive to break overseas enterprise's monopolization, reduces manufacturing cost, promote the sound development of China's electric heater industry.
Description
Technical field
The present invention relates to corrosion resistant alloy cold-rolled strip manufacturing fields, and in particular to corrosion resistant alloy UNS S33400 cold-rolled steel
The preparation method of band and the steel band.
Background technique
Corrosion resistant alloy mechanical property with higher, high-ductility, high-temperature behavior and preferable resisting chloride ion penetration spot corrosion ability,
Its cold-rolled strip product is quickly applied in electric heater, is developed.
Welded tube is manufactured using cold-rolled strip, the core heating element electrothermal tube as electric heater.In recent years, domestic electricity
Water heater Industry Quick Development has the trend for gradually replacing gas heater, thus the prospect of electrothermal tube application demand at present
Good, the development for electric heating tube material provides opportunity.
It using 316L as the stainless steel of representative, is preferably applied in electric heating tube material, but with the variation of environment and ground
The difference in area, it is especially poor in water quality, and the higher area of chloride ion content, the electric heating made of 316L stainless steel
There is very big drawback in pipe, the failure phenomenons such as cracking booster often occur, using effect is poor, and safety is poor, gives in practical applications
Electric heater user causes very big puzzlement.To find out its cause, it is that 316L stainless steel resisting chloride ion penetration spot corrosion is indifferent,
Tube wall is corroded in the electrothermal tube course of work, forms perforation, short circuit and finally generates booster.Thus state, inside and outside enterprise are dedicated to
Novel electrothermal tube material substitution 316L stainless steel is researched and developed, and obtains substantive progress, such as corrosion resistant alloy UNS N08800 cold-rolled steel
Band is mature to be applied to electrothermal tube Material Field.
Using corrosion resistant alloy UNS N08800, stainless steel material is substituted, electrothermal tube quality and service life are effectively increased,
But also inevitably make cost increase.UNS N08800 main component is 20Cr-30Ni, compared to the 17Cr- of 316L stainless steel
12Ni-2Mo, due to greatly improving for precious metal element Ni, hence it is evident that increase material cost；And opening up with electrothermal tube market
Exhibition, the market competition of the effective material of electric heating is also growing more intense, and quality and cost will determine the key element of product competitiveness.Therefore
A kind of performance is found better than the stainless steels such as 316L, cost significantly lower than corrosion resistant alloy UNS N08800, most of electric heating can be met
The alloy material of pipe application is feasible plan.Corrosion resistant alloy UNS S33400 is exactly a kind of suitable new material.
Corrosion resistant alloy UNS S33400, main component 20Cr-20Ni, compared to 316L stainless steel, due to Ni element
It improves, has preferable resisting chloride ion penetration spot corrosion ability；Compared to UNS N08800, Ni constituent content declines one third, tool
There is larger cost advantage；UNS S33400 corrosion resistant alloy also has good mechanical property, high-ductility, high-temperature behavior simultaneously, full
The sufficient effective material requirements of electric heating.It is applicable after being processed as the cold-rolled strip with good dimensional accuracy, surface quality and plate shape
In the production of various sizes electrothermal tube, it can preferably meet the use demand in different quality condition area.
Recently as the country of China electric heater Industry Quick Development, for high-quality, inexpensive electric heating tube material
Demand increasingly increases.
Summary of the invention
Therefore, the technical problem to be solved by the present invention is to propose a kind of low cost welded tube corrosion resistant alloy UNS S33400 and
The manufacturing method of cold-rolled strip.The invention solves another technical problem be to provide cold-rolled steel made from the manufacturing method
Band.The present invention also provides the applications of the steel band.
The technical scheme is that a kind of corrosion resistant alloy UNS S33400 cold-rolled strip manufacturing method, including raw material move back
Fire, raw material pickling and rolling process, in raw material annealing, using the continuous annealing machine furnace of unprotect atmosphere, annealing temperature 950
~1160 DEG C, 5.0~12 ms/min of speed；
In the raw material pickling, using continuous acid-washing unit, pre- pickling+nitration mixture washes group technology, comprising ball blast, cleaning,
Scrub, baking step；Ball blast technique: 900~1200kg/min of ball flow；Feed 1.0~1.5k of the factor；Shot blasting velocity 65~
78m/s；The pre- pickling uses H2SO4Acid cleaning process: concentration 200-330g/l, 80-95 DEG C of temperature；The nitration mixture washes use
HNO3+ HF acid cleaning process: HNO3Concentration 100-200g/l, HF concentration 25-50g/l, 45-65 DEG C of temperature；Pickling speed: 6.0~
15.0 ms/min；
In the rolling, finished product rolling deformation rate 25~75%.
Busbar bright annealing technology is carried out after the rolling, uses ultra-pure hydrogen for the bright annealing machine furnace of protective atmosphere, lehr attendant
Skill: 950~1160 DEG C of temperature, 10~28 ms/min of speed.
Corrosion resistant alloy UNS S33400 cold-rolled strip manufacturing method according to the present invention, it is preferred that the raw material pickling
Precompressed rolling, reconditioning process are successively arranged after process；The smooth process of finished product is equipped with after the bright annealing process；Process flow
Are as follows: raw material annealing-raw material pickling-precompressed rolling-reconditioning-rolling-bright annealing-finished product is smooth.
Corrosion resistant alloy UNS S33400 cold-rolled strip manufacturing method according to the present invention, it is preferred that the precompressed rolling
In, carry out the rolling of 1~2 passage small deformation amount.
Corrosion resistant alloy UNS S33400 cold-rolled strip manufacturing method according to the present invention, it is preferred that the reconditioning process
In, 1~3 group is chosen simultaneously to hot-rolled billet two sides by 3 groups of rack bistriques of crew qiting using wet type abrasive band reconditioning method
Carry out reconditioning.
Corrosion resistant alloy UNS S33400 cold-rolled strip manufacturing method according to the present invention, it is preferred that the finished product is smooth
In process, using dry flat technique, 1~3 passage of progress is smooth, elongation percentage 0.3~1.0%, 350~800 tons of roll-force, tension
3.0~10.0 tons.
General smooth including dry flat and wet jetting piles, difference is to need to use the liquid of lubrication or cooling during wet jetting piles
Medium, such as ROLLING OIL, emulsion.In comparison, dry flat technique more cleans, simply, at low cost, can also reduce influence quality
Hidden danger.
Further, in the reconditioning process, 60~120 mesh of type selecting in the abrasive band；Grinding power 25~45%；Mill
Cut 8~20 ms/min of speed.
Grinding power is an important technical parameter for controlling metal removal amount, guaranteeing thinning surface quality；It reflects
The degree size of bistrique pressure.
It is described anti-corrosion the present invention also provides the corrosion resistant alloy UNS S33400 cold-rolled strip that above-mentioned method manufactures
Alloy UNS S33400 cold-rolled strip tensile strength >=540MPa, yield strength >=225MPa, elongation percentage >=35, hardness≤135.
Manufactured cold-rolled strip excellent combination property more preferably meets electrothermal tube production demand.
Corrosion resistant alloy UNS S33400 cold-rolled strip according to the present invention, it is preferred that the thickness of strips 0.40~
1.50mm, 600~1250mm of width.
The present invention also provides above-mentioned corrosion resistant alloy UNS S33400 cold-rolled strips to be used as electric heating tubing in electric heater
The application of material.
As previously mentioned, overseas enterprise has carried out strictly in terms of corrosion resistant alloy UNS S33400 cold-rolled strip manufacturing technology
Secrecy, do not make relevant report, to protect company interest.The corrosion resistant alloy UNS S33400 that yet there are no this programme proposition is cold
The related introduction of strip rolling manufacturing method.Therefore, completing each factor content of the present invention, there are following technological difficulties:
1, it need to be established suitable according to the quality requirement and practical equipment condition of corrosion resistant alloy UNS S33400 cold-rolled strip
Cold rolling manufacturing process provides accurate guidance for practice production.
2, the technological parameter and control main points of critical process need to be found out, and considers the relevance between each concerned process steps, is made
Draw up the manufacturing process of optimization, including annealing, pickling, reconditioning, rolling, smooth.Implemented by comprehensive, obtains qualified size, outer
The cold-rolled strip of shape, surface quality and excellent performance, it is ensured that manufacture is realized.
It is suitable by establishing the present invention is directed to design a kind of welded tube corrosion resistant alloy UNS S33400 cold-rolled strip manufacturing method
The cold rolling manufacturing process of conjunction works out the critical process technique and control main points of optimization, produces high-quality, inexpensive UNS
S33400 cold-rolled strip product.Through realizing, the product have preferable resisting chloride ion penetration spot corrosion ability, good mechanical property,
High-ductility, high-temperature behavior and excellent plate shape, surface quality and dimensional accuracy are able to satisfy the manufacturing technology requirement of electrothermal tube；Together
Shi Chengben is remarkably decreased, and is conducive to promote the production domesticization of corrosion resistant alloy UNS S33400 cold-rolled strip；For breaking overseas enterprise ridge
It is disconnected, manufacturing cost is reduced, promotes the sound development of China's electric heater industry that there is very strong realistic meaning and wide application
Prospect.
The present invention a kind of inexpensive welded tube corrosion resistant alloy UNS S33400 and cold-rolled strip manufacturing method, it is suitable by establishing
The cold rolling manufacturing process of conjunction works out the critical process technique and control main points of optimization, produces high-quality, inexpensive UNS
S33400 cold-rolled strip product.Realized have resisting chloride ion penetration spot corrosion ability more better than 316L stainless steel；Have and compares UNS
N08800 bigger cost advantage；Also there is good mechanical property, high-ductility, high-temperature behavior simultaneously, meet the effective material of electric heating
Material requires, and can preferably meet the use demand in different quality condition area.It is applied by production domesticization, for breaking overseas enterprise ridge
It is disconnected, manufacturing cost is reduced, the sound development of China's electric heater industry is promoted to be of great significance to.
The beneficial effects of the present invention are:
1, the inexpensive welded tube corrosion resistant alloy UNS S33400 cold-rolled strip produced using the present invention is had preferable
Resisting chloride ion penetration spot corrosion ability, good mechanical property, high-ductility, high-temperature behavior and excellent plate shape, surface quality and size
Precision is able to satisfy the manufacturing technology requirement of electrothermal tube；Cost is remarkably decreased simultaneously, realizes production domesticization.
2, the present invention has been carried out 0.40~1.50mm of thickness, 600~1250mm's of width is more after the implementation of Baosteel special steel
The manufacture of kind specification UNS S33400 cold-rolled strip product.Manufactured product has substituted imported material, to domestic more household electrical appliances
Heat pipe user's volume shipment.For breaking overseas enterprise's monopolization, reduces China's manufacturing cost and obtain positive remarkable result.
3, manufacturing method provided by the present invention is simple, convenient to carry out and control, and has good operability.For state
Interior enterprise researches and develops in related kind corrosion resistant alloy cold-rolled strip, manufacture view has actively demonstration meaning.
Detailed description of the invention
Fig. 1 is typical process flow figure of the invention.
Fig. 2 is preferred process flow chart.
Specific embodiment
Typical process flow is: raw material annealing-raw material pickling-rolling and bright annealing, this is essential condition.One
In a preferred embodiment, in order to produce the effective cold-rolled strip of electric heating with high-grade surface quality and excellent plate shape,
Process flow are as follows: raw material annealing-raw material pickling-precompressed rolling-reconditioning-rolling-bright annealing-finished product is smooth.
Raw material annealing:
Using the continuous annealing machine furnace of unprotect atmosphere, 600~1300mm of convenient width, 2.5~7.0mm of suitable depth,
Wide coverage；Can continuous production after multireel connection, high production efficiency is easy to operate.Machine assembles slave board shape straightening mechanism, can have
Effect improves the flatness defect of hot rolling raw material.Annealing process: 950~1160 DEG C of temperature, 5.0~12 ms/min of speed；Can effectively it change
The structural homogenity of kind hot rolling raw material.
Raw material pickling:
Using continuous acid-washing unit, 600~1300mm of convenient width, 2.5~7.0mm of suitable depth, wide coverage；It can
Continuous production, quality stability and high production efficiency after multireel connection, it is easy to operate.
Using exclusive pre- pickling+nitration mixture group technology is washed, it, can be most comprising ball blast, cleaning, scrub, drying
Big degree removes scale on surface, obtains suitable surface state.
Ball blast technique: 900~1200kg/min of ball flow；Feed 1.0~1.5k of the factor；65~78m/s of shot blasting velocity.
Pre- pickling uses H2SO4Acid cleaning process: concentration 200-330g/l；80-95 DEG C of temperature.
Nitration mixture is washed using HNO3+ HF acid cleaning process: HNO3Concentration 100-200g/l；HF concentration 25-50g/l；Temperature 45-65
℃。
Pickling speed: 6.0~15.0 ms/min.
Precompressed rolling:
Using the multi-roll mill of the types such as 6 rollers, 20 rollers, the rolling of 1~2 passage small deformation amount is carried out, raw material is further improved
Plate shape.
Reconditioning:
Using wet type abrasive band reconditioning method, by 3 groups of crew qiting totally 6 rack bistriques, can choose 1~3 group it is right simultaneously
Hot-rolled billet two sides carries out reconditioning, can effectively remove raw material surface defect.
Thinning technique: 60~120 mesh of type selecting in abrasive band；Grinding power 25~45%；8~20 ms/min of grinding speed.
Rolling:
Using the multi-roll mill of the types such as 6 rollers, 20 rollers, the product of required thickness specification and some strength is rolled.(in cold rolling
Multiple intermediate heat-treatment can be carried out in the process)
Finished product rolling deformation rate 25~75%.
Bright annealing:
It uses ultra-pure hydrogen for the bright annealing machine furnace of protective atmosphere, can get suitable mechanical property and excellent surface state
Cold-rolled strip meets electrothermal tube production demand.
Annealing process: 950~1160 DEG C of temperature, 10~28 ms/min of speed.
Finished product is smooth:
Using two-high dressing mill, 600~1300mm of convenient width, 0.3~4.0mm of suitable depth；Exclusive do is used
Flattening process, 1~3 passage of progress is smooth, can get good cold-rolled steel band plate shape and promotes surface quality, surface roughness Ra can
Up to 0.03mm or less.
Using exclusive permanent elongation percentage Closed loop Control, by roll-force and the control of the preferred and roller of tension and
Tilt adjustment combines, and obtains good profile.Wherein, elongation percentage 0.3~1.0%, 350~800 tons of roll-force, tension 3.0~
10.0 tons.
Embodiment 1
The cold-rolled strip that one specification is 0.45*1250mm
1, raw material is annealed: 1140 DEG C of temperature, 10 ms/min of speed.
2, raw material pickling:
2.1, ball blast technique: ball flow 1200kg/min；Feed factor 1.5k；Shot blasting velocity 78m/s.
2.2, pre- pickling uses H2SO4Acid cleaning process: concentration 280g/l；85 DEG C of temperature.
2.3, nitration mixture is washed using HNO3+ HF acid cleaning process: HNO3Concentration 140g/l；HF concentration 35g/l；65 DEG C of temperature.
2.4, pickling speed: 10 ms/min.
3, precompressed rolls: rolling by design thickness.
4, reconditioning:
4.1, the type selecting in abrasive band: 3 groups are chosen, the 1st, 2 group of 80 mesh；3rd group of 100 mesh.
4.2, grinding power: the 1st, 2 group 35%；3rd group 30%.
4.3,15 ms/min of grinding speed.
5, it rolls: finished product rolling deformation rate 60%.Multiple intermediate heat-treatment is carried out in cold-rolled process.
6, bright annealing: 1130 DEG C of temperature, 28 ms/min of speed.
7, finished product is smooth:
7.1,2 passage of planishing pass.
7.2, elongation percentage 0.9%, 650 tons of roll-force, 5.5 tons of tension.
Embodiment 2
The cold-rolled strip that one specification is 0.8*1200mm
1, raw material is annealed: 1050 DEG C of temperature, 8 ms/min of speed.
2, raw material pickling:
2.1, ball blast technique: ball flow 1150kg/min；Feed factor 1.3k；Shot blasting velocity 75m/s.
2.2, pre- pickling uses H2SO4Acid cleaning process: concentration 250g/l；90 DEG C of temperature.
2.3, nitration mixture is washed using HNO3+ HF acid cleaning process: HNO3Concentration 150g/l；HF concentration 30g/l；Temperature 60 C.
2.4, pickling speed: 12.0 ms/min.
3, precompressed rolls: rolling by design thickness.
4, reconditioning:
4.1, the type selecting in abrasive band: 2 groups are chosen, the 1st group of 60 mesh, the 2nd group of 80 mesh.
4.2, grinding power: the 1st group 30%；2nd group 35%.
4.3,12 ms/min of grinding speed.
5, it rolls: finished product rolling deformation rate 50%.Multiple intermediate heat-treatment is carried out in cold-rolled process.
6, bright annealing: 1100 DEG C of temperature, 20 ms/min of speed.
7, finished product is smooth:
7.1,1 passage of planishing pass.
7.2, elongation percentage 0.7%, 550 tons of roll-force, 7.0 tons of tension.
Embodiment 3
The cold-rolled strip that one specification is 1.2*1100mm
1, raw material is annealed: 1120 DEG C of temperature, 9 ms/min of speed.
2, raw material pickling:
2.1, ball blast technique: ball flow 1100kg/min；Feed factor 1.2k；Shot blasting velocity 70m/s.
2.2, pre- pickling uses H2SO4Acid cleaning process: concentration 320g/l；80 DEG C of temperature.
2.3, nitration mixture is washed using HNO3+ HF acid cleaning process: HNO3Concentration 125g/l；HF concentration 40g/l；Temperature 60 C.
2.4, pickling speed: 10 ms/min.
3, precompressed rolls: rolling by design thickness.
4, reconditioning:
4.1, the type selecting in abrasive band: 2 groups are chosen, the 1st, 2 group of 80 mesh.
4.2, grinding power: the 1st group 40%；2nd group 30%.
4.3,15 ms/min of grinding speed.
5, it rolls: finished product rolling deformation rate 70%.Multiple intermediate heat-treatment is carried out in cold-rolled process.
6, bright annealing: 1050 DEG C of temperature, 15 ms/min of speed.
7, finished product is smooth:
7.1,1 passage of planishing pass.
7.2, elongation percentage 0.5%, 450 tons of roll-force, 9.0 tons of tension.
Implementation result: the properties of product of each embodiment see the table below.
Properties of product meet the requirements and stablize.Several prods have reached tensile strength >=540MPa, and yield strength >=
225MPa, elongation percentage >=35, hardness≤135.Manufactured cold-rolled strip excellent combination property more preferably meets electrothermal tube production
Demand.
Claims (9)
1. a kind of corrosion resistant alloy UNS S33400 cold-rolled strip manufacturing method, including raw material annealing, raw material pickling and rolling process,
It is characterized by: in the raw material annealing, using the continuous annealing machine furnace of unprotect atmosphere, 950~1160 DEG C of annealing temperature, speed
5.0~12 ms/min of degree；
In the raw material pickling, using continuous acid-washing unit, pre- pickling+nitration mixture washes group technology, comprising ball blast, cleaning, scrub,
Baking step；Ball blast technique: 900~1200kg/min of ball flow；Feed 1.0~1.5k of the factor；65~78m/s of shot blasting velocity；
The pre- pickling uses H2SO4Acid cleaning process: concentration 200-330g/l, 80-95 DEG C of temperature；The nitration mixture is washed using HNO3+ HF acid
Wash technique: HNO3Concentration 100-200g/l, HF concentration 25-50g/l, 45-65 DEG C of temperature；Pickling speed: 6.0~15.0 ms/min
Clock；
In the rolling, finished product rolling deformation rate 25~75%；
Busbar bright annealing technology is carried out after the rolling, uses ultra-pure hydrogen for the bright annealing machine furnace of protective atmosphere, annealing process: temperature
950~1160 DEG C, 10~28 ms/min of speed of degree.
2. corrosion resistant alloy UNS S33400 cold-rolled strip manufacturing method according to claim 1, it is characterised in that: the original
Precompressed rolling, reconditioning process are successively arranged after material pickling process；The smooth process of finished product is equipped with after the bright annealing process；Technique
Process are as follows: raw material annealing-raw material pickling-precompressed rolling-reconditioning-rolling-bright annealing-finished product is smooth.
3. corrosion resistant alloy UNS S33400 cold-rolled strip manufacturing method according to claim 2, it is characterised in that: described pre-
In pressure rolling system, the rolling of 1~2 passage small deformation amount is carried out.
4. corrosion resistant alloy UNS S33400 cold-rolled strip manufacturing method according to claim 2, it is characterised in that: described to repair
In grinder sequence, 1~3 group is chosen simultaneously to hot-rolled strip by 3 groups of rack bistriques of crew qiting using wet type abrasive band reconditioning method
Base two sides carries out reconditioning.
5. corrosion resistant alloy UNS S33400 cold-rolled strip manufacturing method according to claim 2, it is characterised in that: it is described at
In the smooth process of product, using dry flat technique, 1~3 passage of progress is smooth, elongation percentage 0.3~1.0%, roll-force 350~800
Ton, 3.0~10.0 tons of tension.
6. corrosion resistant alloy UNS S33400 cold-rolled strip manufacturing method according to claim 4, it is characterised in that: described
In reconditioning process, 60~120 mesh of type selecting in the abrasive band；Grinding power 25~45%；8~20 ms/min of grinding speed.
7. the corrosion resistant alloy UNS that corrosion resistant alloy UNS S33400 cold-rolled strip manufacturing method described in claim 1 manufactures
S33400 cold-rolled strip, it is characterised in that: the corrosion resistant alloy UNS S33400 cold-rolled strip tensile strength >=540MPa, surrender
Intensity >=225MPa, elongation percentage >=35, hardness≤135.
8. corrosion resistant alloy UNS S33400 cold-rolled strip according to claim 7, it is characterised in that: the thickness of strips
0.40~1.50mm, 600~1300mm of width.
9. corrosion resistant alloy UNS S33400 cold-rolled strip answering as electric heating tube material in electric heater described in claim 7
With.
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| CN (1) | CN109112278A (en) |
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| CN110885922A (en) * | 2018-09-07 | 2020-03-17 | 宝钢特钢有限公司 | Method for manufacturing high-grade corrosion-resistant alloy cold-rolled thin material |
| CN111085542A (en) * | 2019-12-13 | 2020-05-01 | 浦项(张家港)不锈钢股份有限公司 | Method for improving pitting defects on surface of cold-rolled 316L stainless steel |
| CN112337992A (en) * | 2020-09-21 | 2021-02-09 | 江苏华久辐条制造有限公司 | Cold-rolled strip steel strength improving process |
| CN112974522A (en) * | 2021-02-22 | 2021-06-18 | 山西太钢不锈钢精密带钢有限公司 | Production method for improving corrosion resistance and reducing pipe breakage rate of precision strip steel for heating pipe |
| CN114700698A (en) * | 2022-04-25 | 2022-07-05 | 天津冶金集团天材科技发展有限公司 | Processing technology of nickel-based corrosion-resistant alloy strip |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110885922A (en) * | 2018-09-07 | 2020-03-17 | 宝钢特钢有限公司 | Method for manufacturing high-grade corrosion-resistant alloy cold-rolled thin material |
| CN111085542A (en) * | 2019-12-13 | 2020-05-01 | 浦项(张家港)不锈钢股份有限公司 | Method for improving pitting defects on surface of cold-rolled 316L stainless steel |
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| CN112337992A (en) * | 2020-09-21 | 2021-02-09 | 江苏华久辐条制造有限公司 | Cold-rolled strip steel strength improving process |
| CN112974522A (en) * | 2021-02-22 | 2021-06-18 | 山西太钢不锈钢精密带钢有限公司 | Production method for improving corrosion resistance and reducing pipe breakage rate of precision strip steel for heating pipe |
| CN114700698A (en) * | 2022-04-25 | 2022-07-05 | 天津冶金集团天材科技发展有限公司 | Processing technology of nickel-based corrosion-resistant alloy strip |
| CN114700698B (en) * | 2022-04-25 | 2024-03-19 | 天津冶金集团天材科技发展有限公司 | Processing technology of nickel-based corrosion-resistant alloy strip |
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Application publication date: 20190101 |