CN106636913A - Steel belt for flux-cored wire for ships and production method of steel belt - Google Patents
Steel belt for flux-cored wire for ships and production method of steel belt Download PDFInfo
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- CN106636913A CN106636913A CN201610862953.8A CN201610862953A CN106636913A CN 106636913 A CN106636913 A CN 106636913A CN 201610862953 A CN201610862953 A CN 201610862953A CN 106636913 A CN106636913 A CN 106636913A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- 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
-
- 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
- C21D8/0226—Hot rolling
-
- 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
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The invention discloses a steel belt for a flux-cored wire for ships and a production method of the steel belt.Steel of the steel belt comprises, by mass, 0.02-0.04% of C, 0.15-0.25% of Mn, 0-0.010% of S, 0-0.010% of P, 0-0.03% of Si, 0.010-0.030% of Alt, 0-0.0050% of N and the balance Fe and inevitable impurities. The production method of the steel belt for the flux-cored wire for ships comprises the steps of converter steel making, external refining, continuous casting, hot rolling, cold rolling, annealing, flattening and rewinding, specifically, the mass fraction of N is controlled to be smaller than or equal to 0.0050% through the step of external refining. According to the steel belt and the production method thereof, the production cost is low, a novel effective method is provided for producing high-quality cold-rolled plates, the method makes a contribution to improving the production quality of the high-end cold-rolled plates, the requirements of the welding industry for the high-end cold-rolled base plates can be greatly relieved, and the method has remarkable economic benefits.
Description
Technical field
The invention belongs to cold-rolled low carbon steel band production technical field, and in particular to a kind of ship with medicine core steel for welding wire band and
Its production method.
Background technology
Flux-cored wire is a kind of emerging welding material, and it is that medicinal powder package is rolled into different cross section shape in thin steel strip to fill out
Fill in steel pipe, Jing rolls to pull out and is processed into, can continuous conduction, automatically or semi-automatically welded, production efficiency is high, splashes little,
The easily starting the arc, appearance of weld is attractive in appearance, smooth.Flux-cored wire steel band is the indispensable crust metal of flux-cored wire, is a kind of high
The product of added value.
At present, there is problems with user's production flux-cored wire process：The high drawing process easy fracture of crust metal C content；
S, P content are high, and flux-cored wire crackle easily occurs using process；Steel band performance is higher, affects welding performance；Steel band performance is low,
Affect welding wire feeding performance.Based on demand of the above user to product, steel band steel used must be pure, and steel band Properties Control must
Palpus fluctuation range is little, and the present invention realizes the life of clean steel band by optimization smelting process and the Special controlling to chemical element
Produce, and by the adjustment of the techniques such as rolling, annealing, it is ensured that steel band performance it is uniform, stable, realize flux-cored wire steel band
Low cost, high quality of production.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of ship medicine core steel for welding wire band and its production method, the medicine
Core steel for welding wire band has suitable intensity and good drawing.
To solve above-mentioned technical problem, the technical solution used in the present invention is：A kind of ship medicine core steel for welding wire band,
The steel grade chemical composition and weight/mass percentage composition are as follows：C：0.02-0.04%, Mn：0.15-0.25%, S≤0.010%, P≤
0.010%, Si≤0.03%, Alt：0.010-0.030%, N≤0.0050%, remaining is iron and inevitable impurity.
Ship of the present invention is as follows with mechanical property of the medicine core steel for welding wire with product：Yield strength≤230MPa, resists
Tensile strength 280-350MPa, elongation after fracture A50mm≥40%。
Ship medicine core steel for welding wire band specification limit of the present invention is thickness 0.5-2.0mm, width 1000-
1450mm；Hot rolling raw material specification scope is thickness 2.0-4.5mm, width 1000-1500mm.
Another object of the present invention is to provide a kind of production method of above-mentioned ship medicine core steel for welding wire band, the production
Method includes converter smelting, external refining, continuous casting, hot rolling, cold rolling, annealing, smooth and rewinding operation, the external refining operation
The mass fraction for controlling N is≤0.0050%.
Converter smelting operation of the present invention, the mass fraction for controlling S, P is≤0.010%；The external refining operation is
RH vacuum refining operations, it is 0.020-0.035%, the mass fraction 0.015- of Al that gained molten steel controls the mass fraction of C
0.030%。
In hot-rolled process of the present invention, heating-up temperature 1200-1280 DEG C, finishing temperature 870-910 DEG C, coiling temperature
570-600℃。
In cold rolling process of the present invention, cold rolling total reduction is 50-80%.
Annealing operation of the present invention adopts the bell-type annealing, annealing process to be：Cold-point temperature is 600-630 DEG C, and focus is
680-700 DEG C, band heating mantles cool time is 1-2 hours, and it is air-cooled to 75～100 DEG C to change cooling dome into, plucks cover and is air cooled to room temperature.
In smooth operation of the present invention, smooth elongation percentage is 0.8～1.4%.
In rewinding operation of the present invention, straightening is carried out during rewinding, straightening elongation percentage is 0.1～0.3%.
The mentality of designing of the present invention is as follows：
1st, the present invention using RH it is completely straight on, reduce the LF intensification links of technological process, made technique in order, reduce and produce into
This.
2nd, compared with common cold-rolled low carbon steel band, in the present invention C content by middle line traffic control, improve the content of Mn to carry
The intensity of high steel band, it is ensured that the drawing of steel band and the wire feeding property of finished product welding wire；The content of S, P objectionable impurities is reduced, is reduced
The crack sensitivity of weld metal.
3rd, by hot-rolled high rolling and low temperature curling, the precipitation of AlN is controlled, is conducive to obtaining for good formability product
；The cold hot(test)-spot temperature and the type of cooling of control bell-type annealing, is obtained in that the ferrite matrix of perfect recrystallization, improves
The ductility of product；Realize improving mechanical performance reinforcement, plate shape and eliminating yield point elongation by smooth, by smooth appropriate
Elongation control, obtain suitable yield strength, realize strengthening mechanical performance, it is to avoid because material property is low, make plus
Welding wire after work is easily deformed；After straightening using little elongation percentage, can more effectively improve plate shape, the slitting for being conducive to sheet material adds
Work.During operation dual using smooth and straightening, can more guarantee that plate shape is straight and eliminate yield point elongation.Meet for the shaping of final pipe crimping
Require to provide inherent with external guarantee.
It is using the beneficial effect of above-mentioned technical proposal generation：The flux-cored wire of present invention production is steady with steel band performance
Fixed, quality is good；Low production cost of the present invention, production stability is high, can produce high-quality ship medicine core steel for welding wire
Band, especially has high demands and requires that there is steel band good extensibility to produce with the cold-rolled strip of toughness to steel strip surface.
Description of the drawings
Fig. 1 is the horizontal 200 times of organization charts of the ship medicine core steel for welding wire band of embodiment 1；
Fig. 2 is the 200 times of organization charts in the ship medicine core steel for welding wire band of embodiment 1 longitudinal direction.
Specific embodiment
With reference to specific embodiment, the present invention is further detailed explanation.
This ship production method of medicine core steel for welding wire band includes desulfurizing iron, converter smelting, external refining, continuous casting,
Hot rolling, cold rolling, annealing, smooth and rewinding operation, it is adaptable to the ship production of medicine core steel for welding wire band, the technique step of each operation
Suddenly it is：
Steel making working procedure：The pre- desulfurization process of molten iron Jing, reach S%≤0.003%, it is desirable to rate >=95% of skimming.Steel-making is using 100 tons
Top and bottom combined blown converter, takes the decarburization converter not slag-blocked tapping of falling stove, while carrying out to converter tapping process material addition sequence
Optimization, realizes high temperature tapping converter dephosphorization purpose, effect stability.Tapping process adds high carbon ferromanganese with manganese to 0.15-
0.20%, add 350-450kg lime face, fluorite 30-80kg per stove.Tapping process argon bottom-blowing is switched on.
RH refining procedures：LF intensifications are not walked after the tapping of converter smelting operation, technique are directly gone up using RH, make technological process in order,
Reduces cost；RH inlet temperature >=1630 DEG C.Vacuum 0.1-25KPa, decarburization time≤8min are required during circulation decarburization.It is de-
Carbon terminates rear thermometric, determines oxygen, and according to oxygen result is determined Al is adjusted, and using mid-carbon fe-mn manganese is finely tuned.Outbound reference Al%：0.015-
0.030%。
Continuous casting working procedure：Casting process is finally realized entire oxygen content in the steel content and is less than using permanent pulling rate and whole process protection casting
The purifying of steel of 50ppm.
Hot rolling and cold rolling process：Hot rolling finishing temperature is 870-910 DEG C, and coiling temperature is 560-600 DEG C, takes back segment cold
But；Hot rolled strip is cold rolling after pickling, and cold rolling total reduction is 50-80%, and the chill plate of acquisition is with specification：0.5-2.0×
1250mm。
Annealing operation：Chill plate is annealed using full-hydrogen hood-type annealing furnace, this reducing atmosphere is conducive to removing
Greasy dirt, the oxide-film on strip surface etc., obtain the belt steel surface of light；Annealing process is：Cold-point temperature is 600-630 DEG C, heat
Point is 680-700 DEG C, band heating mantles Slow cooling 1-2h, changes air-cooled to 75-100 DEG C of cooling dome into, plucks cover and is air cooled to room temperature.
Smooth operation：Permanent elongation control pattern, the setting of elongation percentage is taken to be changed according to the thickness change of strip；It is flat
Make steel band that there is good version type and relatively low surface roughness, elimination or diminution yield point elongation after whole, prevent plus man-hour is formed
Crease；Air purging pressure is >=4bar.
Rewinding operation：Rewinding straightening elongation percentage is 0.1-0.3%, and described cold rolled annealed plate, i.e. ship are obtained after rewinding
Oceangoing ship medicine core steel for welding wire band.
With reference to specific embodiment, the present invention is further detailed explanation.
Embodiment 1
Ship is as follows with medicine core steel for welding wire band chemical composition and weight/mass percentage composition：C：0.026%, Mn：0.20%, S：
0.006%, P：0.008%, Si：0.02%, Al：0.020%, N：0.0019%, remaining is iron and inevitable impurity.
Ship is as follows with the production method of medicine core steel for welding wire band：
Smelting procedure：Bottom blowing whole process uses argon gas, and the mass fraction for controlling P is 0.006% for the mass fraction of 0.008%, S；
RH vacuum external refinings：The mass fraction 0.024% of C, the mass fraction 0.022% of Al are controlled, the mass fraction of N is
0.0017%。
Continuous casting working procedure：Casting process is cast using perseverance pulling rate 1.3m/min and whole process protection；
Hot rolling and cold rolling process：1240 DEG C of heating-up temperature, hot rolling finishing temperature is 895 DEG C, and coiling temperature is 590 DEG C, after taking
Section cooling；Hot rolled strip is cold rolling after pickling, and cold rolling total reduction is 77%, the chill plate band specification of acquisition：0.8×
1255mm。
Hot rolling raw material specification scope is thickness 2.0-4.5mm, width 1000-1500mm.
Annealing operation：It is 600 DEG C that technique is cold-point temperature, and focus is 695 DEG C, and band heating mantles Slow cooling 1.5h changes cooling into
Cover is air-cooled to 80 DEG C, plucks cover and is air cooled to room temperature.
Smooth operation：The strip of 0.8mm in the present embodiment, using 1.0% smooth elongation percentage.
Rewinding operation：Rewinding straightening elongation percentage is 0.15%, and described ship medicine core steel for welding wire is obtained after rewinding
Band.
Through inspection, yield strength is 194MPa to the steel band, and tensile strength is 326MPa, elongation percentage A50mmFor 45%.
Embodiment 2
A kind of ship is as follows with medicine core steel for welding wire band chemical composition and weight/mass percentage composition：C：0.025%, Mn：0.19%, S：
0.008%, P：0.007%, Si：0.02%, Al：0.019%, N：0.0031%, remaining is iron and inevitable impurity.
Ship is as follows with the production method of medicine core steel for welding wire band：
Smelting procedure：Bottom blowing whole process uses argon gas, and the mass fraction for controlling P is 0.008% for the mass fraction of 0.007%, S；
RH vacuum external refinings：The mass fraction 0.023% of C, the mass fraction 0.022% of Al are controlled, the mass fraction of N is
0.0028%。
Continuous casting working procedure：Casting process is using permanent pulling rate and whole process protection casting；
Hot rolling and cold rolling process：1250 DEG C of heating-up temperature, hot rolling finishing temperature is 900 DEG C, and coiling temperature is 580 DEG C, after taking
Section cooling；Hot rolled strip is cold rolling after pickling, and cold rolling total reduction is 74%, the chill plate band specification of acquisition：0.9×
1253mm。
Annealing operation：It is 610 DEG C that technique is cold-point temperature, and focus is 700 DEG C, and band heating mantles Slow cooling 1.5h is changed into
Cooling dome is air-cooled to 80 DEG C, plucks cover and is air cooled to room temperature.
Smooth operation：The strip of 0.9mm in the present embodiment, using 1.0% smooth elongation percentage.
Rewinding operation：Rewinding straightening elongation percentage is 0.12%, and described ship medicine core steel for welding wire is obtained after rewinding
Band.
Through inspection, yield strength is 191MPa to the steel band, and tensile strength is 304MPa, elongation percentage A50mmFor 49%.
Embodiment 3
A kind of ship is as follows with medicine core steel for welding wire band chemical composition and weight/mass percentage composition：C：0.032%, Mn：0.18%, S：
0.005%, P：0.006%, Si：0.01%, Al：0.015%, N：0.0022%, remaining is iron and inevitable impurity.
Ship is as follows with the production method of medicine core steel for welding wire band：
Smelting procedure：Bottom blowing whole process uses argon gas, and the mass fraction for controlling P is 0.005% for the mass fraction of 0.006%, S；
RH vacuum external refinings：The mass fraction 0.028% of C, the mass fraction 0.019% of Al are controlled, the mass fraction of N is
0.0019%。
Continuous casting working procedure：Casting process is cast using perseverance pulling rate 1.3m/min and whole process protection；
Hot rolling and cold rolling process：1235 DEG C of heating-up temperature, hot rolling finishing temperature is 890 DEG C, and coiling temperature is 585 DEG C, after taking
Section cooling；Hot rolled strip is cold rolling after pickling, and cold rolling total reduction is 71%, the chill plate band specification of acquisition：1.0×
1248mm。
Annealing operation：It is 600 DEG C that technique is cold-point temperature, and focus is 690 DEG C, and band heating mantles Slow cooling 1.5h is changed into
Cooling dome is air-cooled to 88 DEG C, plucks cover and is air cooled to room temperature.
Smooth operation：The strip of 1.0mm in the present embodiment, using 1.2% smooth elongation percentage.
Rewinding operation：Rewinding straightening elongation percentage is 0.1%, and described ship medicine core steel for welding wire is obtained after rewinding
Band.
Through inspection, yield strength is 181MPa to the steel band, and tensile strength is 324MPa, elongation percentage A50mmFor 47%.
Embodiment 4
A kind of ship is as follows with medicine core steel for welding wire band chemical composition and weight/mass percentage composition：C：0.031%, Mn：0.18%, S：
0.003%, P：0.006%, Si：0.01%, Al：0.018%, N：0.0025%, remaining is iron and inevitable impurity.
Ship is as follows with the production method of medicine core steel for welding wire band：
Smelting procedure：Bottom blowing whole process uses argon gas, and the mass fraction for controlling P is 0.003% for the mass fraction of 0.006%, S；
RH vacuum external refinings：The mass fraction 0.028% of C, the mass fraction 0.021% of Al are controlled, the mass fraction of N is
0.0022%。
Continuous casting working procedure：Casting process is cast using perseverance pulling rate 1.3m/min and whole process protection；
Hot rolling and cold rolling process：1245 DEG C of heating-up temperature, hot rolling finishing temperature is 905 DEG C, and coiling temperature is 600 DEG C, after taking
Section cooling；Hot rolled strip is cold rolling after pickling, and cold rolling total reduction is 78%, the chill plate band specification of acquisition：0.5×
1250mm。
Annealing operation：It is 605 DEG C that technique is cold-point temperature, and focus is 690 DEG C, and band heating mantles Slow cooling 1.5h is changed into
Cooling dome is air-cooled to 85 DEG C, plucks cover and is air cooled to room temperature.
Smooth operation：The strip of 0.5mm in the present embodiment, using 0.9% smooth elongation percentage.
Rewinding operation：Rewinding straightening elongation percentage is 0.15%, and described ship medicine core steel for welding wire is obtained after rewinding
Band.
Through inspection, yield strength is 186MPa to the steel band, and tensile strength is 315MPa, elongation percentage A50mmFor 47%.
Embodiment 5
A kind of ship is as follows with medicine core steel for welding wire band chemical composition and weight/mass percentage composition：C：0.04%, Mn：0.25%, S：
0.010%, P：0.010%, Si：0.03%, Al：0.030%, N：0.0050%, remaining is iron and inevitable impurity.
Ship is as follows with the production method of medicine core steel for welding wire band：
Smelting procedure：Bottom blowing whole process uses argon gas, and the mass fraction for controlling P is 0.010% for the mass fraction of 0.006%, S；
RH vacuum external refinings：The mass fraction 0.035% of C, the mass fraction 0.030% of Al are controlled, the mass fraction of N is
0.0047%。
Continuous casting working procedure：Casting process is cast using perseverance pulling rate 1.3m/min and whole process protection；
Hot rolling and cold rolling process：1200 DEG C of heating-up temperature, hot rolling finishing temperature is 870 DEG C, and coiling temperature is 570 DEG C, after taking
Section cooling；Hot rolled strip is cold rolling after pickling, and cold rolling total reduction is 50%, the chill plate band specification of acquisition：2.0×
1000mm。
Annealing operation：It is 630 DEG C that technique is cold-point temperature, and focus is 680 DEG C, and band heating mantles Slow cooling 1h is changed into cold
But cover air-cooled to 100 DEG C, pluck cover and be air cooled to room temperature.
Smooth operation：The strip of 1.0mm in the present embodiment, using 1.2% smooth elongation percentage.
Rewinding operation：Rewinding straightening elongation percentage is 0.1%, and described ship medicine core steel for welding wire is obtained after rewinding
Band.
Through inspection, yield strength is 213MPa to the steel band, and tensile strength is 320MPa, elongation percentage A50mmFor 43%.
Embodiment 6
A kind of ship is as follows with medicine core steel for welding wire band chemical composition and weight/mass percentage composition：C：0.02%, Mn：0.15%, S：
0.005%, P：0.006%, Si：0.01%, Al：0.010%, N：0.0020%, remaining is iron and inevitable impurity.
Ship is as follows with the production method of medicine core steel for welding wire band：
Smelting procedure：Bottom blowing whole process uses argon gas, and the mass fraction for controlling P is 0.005% for the mass fraction of 0.006%, S；
RH vacuum external refinings：The mass fraction 0.020% of C, the mass fraction 0.015% of Al are controlled, the mass fraction of N is
0.0018%。
Continuous casting working procedure：Casting process is cast using perseverance pulling rate 1.3m/min and whole process protection；
Hot rolling and cold rolling process：1280 DEG C of heating-up temperature, hot rolling finishing temperature is 910 DEG C, and coiling temperature is 595 DEG C, after taking
Section cooling；Hot rolled strip is cold rolling after pickling, and cold rolling total reduction is 80%, the chill plate band specification of acquisition：1.0×
1450mm。
Annealing operation：It is 610 DEG C that technique is cold-point temperature, and focus is 695 DEG C, and band heating mantles Slow cooling 2h is changed into cold
But cover air-cooled to 75 DEG C, pluck cover and be air cooled to room temperature.
Smooth operation：The strip of 1.0mm in the present embodiment, using 1.2% smooth elongation percentage.
Rewinding operation：Rewinding straightening elongation percentage is 0.3%, and described ship medicine core steel for welding wire is obtained after rewinding
Band.
Through inspection, yield strength is 196MPa to the steel band, and tensile strength is 308MPa, elongation percentage A50mmFor 47%.
Accompanying drawing 1,2 is respectively the ship medicine core steel for welding wire band horizontal stroke of the embodiment of the present invention 1, indulges 200 times of organization charts, passes through
Accompanying drawing can be seen that the metallographic structure of the product steel band that the present invention is obtained and is mainly made up of ferrite and a small amount of free cementite,
Wherein ferrite form is cheese, and free cementite is distributed in crystal boundary and transgranular in scattered point-like, short chain shape.The present invention is obtained
Product even tissue, without the abnormal structure such as mixed crystal, segregation, to be conducive to the cheese crystal grain of punching press.
Above example is only to illustrative and not limiting technical scheme, although reference above-described embodiment is to this
It is bright to be described in detail, it will be understood by those within the art that：Still the present invention can be modified or be waited
With replacing, any modification or partial replacement without departing from the spirit and scope of the present invention, it all should cover the power in the present invention
In the middle of sharp claimed range.
Claims (10)
1. a kind of ship medicine core steel for welding wire band, it is characterised in that the steel grade chemical composition and weight/mass percentage composition are as follows：
C：0.02-0.04%, Mn：0.15-0.25%, S≤0.010%, P≤0.010%, Si≤0.03%, Alt：0.010-0.030%, N≤
0.0050%, remaining is iron and inevitable impurity.
2. a kind of ship according to claim 1 medicine core steel for welding wire band, it is characterised in that the ship is welded with medicine core
The mechanical property of silk strip product is as follows：Yield strength≤230MPa, tensile strength 280-350MPa, elongation after fracture A50mm
≥40%。
3. a kind of ship according to claim 1 medicine core steel for welding wire band, it is characterised in that the ship is welded with medicine core
Silk steel band specification limit is thickness 0.5-2.0mm, width 1000-1450mm；Hot rolling raw material specification scope is thickness 2.0-
4.5mm, width 1000-1500mm.
4. a kind of production method of the medicine core steel for welding wire band of the ship described in claim 1-3 any one, its feature are based on
It is that the production method includes converter smelting, external refining, continuous casting, hot rolling, cold rolling, annealing, smooth and rewinding operation, institute
State external refining operation control N mass fraction be≤0.0050%.
5. a kind of ship medicine core steel for welding wire band and its production method according to claim 4, it is characterised in that described
Converter smelting operation, the mass fraction for controlling S, P is≤0.010%；The external refining operation be RH vacuum refining operations, institute
Molten steel control C mass fraction be 0.020-0.035%, the mass fraction 0.015-0.030% of Al.
6. production method according to claim 4, it is characterised in that in the hot-rolled process, heating-up temperature 1200-1280
DEG C, finishing temperature 870-910 DEG C, 570-600 DEG C of coiling temperature.
7. production method according to claim 4, it is characterised in that in the cold rolling process, cold rolling total reduction is 50-
80%。
8. the production method according to claim 4-7 any one, it is characterised in that the annealing operation is moved back using bell-type
Fire, annealing process is：Cold-point temperature is 600-630 DEG C, and focus is 680-700 DEG C, and band heating mantles cool time is 1-2 hours,
Change cooling dome into air-cooled to 75～100 DEG C, pluck cover and be air cooled to room temperature.
9. the production method according to claim 4-7 any one, it is characterised in that smooth to prolong in the smooth operation
Rate is stretched for 0.8～1.4%.
10. the production method according to claim 4-7 any one, it is characterised in that in the rewinding operation, during rewinding
Straightening is carried out, straightening elongation percentage is 0.1～0.3%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610862953.8A CN106636913A (en) | 2016-09-29 | 2016-09-29 | Steel belt for flux-cored wire for ships and production method of steel belt |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107937812A (en) * | 2017-11-27 | 2018-04-20 | 武汉钢铁有限公司 | High cleanliness flux-cored wire special steel strip and its manufacture method |
| CN110541120A (en) * | 2019-10-18 | 2019-12-06 | 山东钢铁集团日照有限公司 | Production method of hot-dip galvanized low-alloy high-strength steel without yield platform for automobile plate |
| CN112695178A (en) * | 2020-12-17 | 2021-04-23 | 包头钢铁（集团）有限责任公司 | Method for improving stamping performance of cold-rolled low-carbon steel |
| CN112725692A (en) * | 2020-12-17 | 2021-04-30 | 包头钢铁（集团）有限责任公司 | Preparation method of steel strip for nitriding treatment |
| CN112760462A (en) * | 2020-12-17 | 2021-05-07 | 包头钢铁（集团）有限责任公司 | Preparation method of steel for flux-cored wire |
| CN114959476A (en) * | 2022-05-27 | 2022-08-30 | 山东钢铁集团日照有限公司 | Economical cold-rolled steel strip for flux-cored wire and production method thereof |
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| CN102676917A (en) * | 2012-05-09 | 2012-09-19 | 首钢总公司 | Preparation method of cold-rolled sheet for flux-cored wire |
| CN103659045A (en) * | 2012-09-12 | 2014-03-26 | 昆山京群焊材科技有限公司 | Titaniferous metal flux-cored wire for carbon dioxide arc welding |
| CN105648312A (en) * | 2016-01-18 | 2016-06-08 | 唐山钢铁集团有限责任公司 | Oxygen-bearing steel belt and production method thereof |
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| CN103659045A (en) * | 2012-09-12 | 2014-03-26 | 昆山京群焊材科技有限公司 | Titaniferous metal flux-cored wire for carbon dioxide arc welding |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107937812A (en) * | 2017-11-27 | 2018-04-20 | 武汉钢铁有限公司 | High cleanliness flux-cored wire special steel strip and its manufacture method |
| CN110541120A (en) * | 2019-10-18 | 2019-12-06 | 山东钢铁集团日照有限公司 | Production method of hot-dip galvanized low-alloy high-strength steel without yield platform for automobile plate |
| CN112695178A (en) * | 2020-12-17 | 2021-04-23 | 包头钢铁（集团）有限责任公司 | Method for improving stamping performance of cold-rolled low-carbon steel |
| CN112725692A (en) * | 2020-12-17 | 2021-04-30 | 包头钢铁（集团）有限责任公司 | Preparation method of steel strip for nitriding treatment |
| CN112760462A (en) * | 2020-12-17 | 2021-05-07 | 包头钢铁（集团）有限责任公司 | Preparation method of steel for flux-cored wire |
| CN114959476A (en) * | 2022-05-27 | 2022-08-30 | 山东钢铁集团日照有限公司 | Economical cold-rolled steel strip for flux-cored wire and production method thereof |
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