CN110016618A - High silicon content welding steel and preparation method thereof - Google Patents
High silicon content welding steel and preparation method thereof Download PDFInfo
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- CN110016618A CN110016618A CN201910433945.5A CN201910433945A CN110016618A CN 110016618 A CN110016618 A CN 110016618A CN 201910433945 A CN201910433945 A CN 201910433945A CN 110016618 A CN110016618 A CN 110016618A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0025—Adding carbon material
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
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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
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
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- 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
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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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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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
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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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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Abstract
The present invention relates to high silicon content welding steels and preparation method thereof, belong to field of steel production.The present invention provides high silicon content welding steels, its chemical composition comprises the following components in percentage by weight are as follows: C:0.06-0.09%, Si:0.80-1.10%, Mn:1.40-1.70%, P≤0.020%, S≤0.020%, Cr≤0.15%, Ni≤0.15%, Cu≤0.15%, Mo≤0.10%, As≤0.020%, Ca≤0.0010%, Al≤0.015%, O≤0.0050%, N≤0.0080%, surplus are Fe and inevitable impurity.Welding steel spatter produced by the invention is small, appearance of weld is beautiful；In addition, also having the advantages that even tissue, wire rod head, middle and end mechanical property is uniform.
Description
Technical field
The present invention relates to high silicon content welding steels and preparation method thereof, belong to field of steel production.
Background technique
Welding material is steel " sewing thread " and " binder ", and main raw material(s) is steel, and steel product cost is welding
Shared ratio is higher in material manufacturing cost, and the fluctuation of steel market will directly affect wlding industry cost of raw and production
Product selling price.Different welding materials has different requirements to steel, and kind, the quality of steel influence whether the product of wlding
Quality and new product development.The welding material produced using steel wire for welding, mainly there is welding rod, gas shield welding wire and submerged-arc welding
Silk, flux-cored wire mainly use cold-rolled strip to produce.
Currently, welding steel standard GB/T3429-2015 only wants the content of C, Si, Mn, P, S, Cr, Ni, Cu, Mo
It asks, the content of other elements does not carry out strict control.Welding steel splashes seriously in the welding process, also needs pair after user's welding
Workpiece surface is handled, and production cost is increased, and is unfavorable for the popularization and application of welding material.
In addition, wlding manufacturer drawing process eliminates heat treatment procedure, steel wire for welding removal oxidation at present
Drawing is directly carried out after skin, i.e., φ 0.6-1.6mm is pulled to by φ 5.5mm, this just needs welding steel to have suitable tension
Intensity, higher plasticity and toughness, and can guarantee weld properties and quality.Steel inclusion easily causes drawing welding wire process disconnected
It splits, while being also one of the main reason for causing weld metal defect and spatter, so non-metallic inclusion shape should be controlled
State, size, number etc.；In addition, wire rod surface must not have crackle, fold, scabs, ears or side handles of a utensil layering and be mingled with, allow to have impression and
Convex block, the pit, scratch, pitted skin of part, but its depth or height: B, C class precision wire rod are not greater than 0.10mm；Other precision
Grade is not greater than 0.20mm.
However, even if nonmetal inclusion and disk circle specifications control it is proper in the case where, steel wire for welding also usually because
It is uneven for tissue, performance, as a result there is fracture of wire during drawing core wire stick silk, influences production efficiency.
Summary of the invention
The present invention is directed at least solve one of the technical problems existing in the prior art.For this purpose, it is an object of the invention to
High silicon content welding steel is provided.Another object of the present invention is to provide the preparation methods of the welding steel.
The present invention provides high silicon content welding steel, chemical composition comprises the following components in percentage by weight are as follows: C:0.06-
0.09%, Si:0.80-1.10%, Mn:1.40-1.70%, P≤0.020%, S≤0.020%, Cr≤0.15%, Ni≤
0.15%, Cu≤0.15%, Mo≤0.10%, As≤0.020%, Ca≤0.0010%, Al≤0.015%, O≤
0.0050%, N≤0.0080%, surplus are Fe and inevitable impurity.
Further, chemical composition comprises the following components in percentage by weight are as follows: C:0.06-0.08%, Si:0.80-0.95%, Mn:
1.45-1.60%, P≤0.015%, S≤0.015%, Cr≤0.15%, Ni≤0.15%, Cu≤0.15%, Mo≤
0.10%, As≤0.015%, Ca≤0.0010%, Al≤0.010%, O≤0.0040%, N≤0.0070%, surplus Fe
With inevitable impurity.
Preferably, chemical composition comprises the following components in percentage by weight are as follows: C:0.06-0.08%, Si:0.81-0.95%, Mn:
1.45-1.60%, P:0.008-0.012%, S:0.007-0.012%, Cr:0.05%, Ni:0.04-0.05%, Cu:0.04-
0.05%, Mo:0.05-0.06%, As:0.009-0.010%, Ca:0.0004-0.0005%, Al:0.004%, O:
0.0015-0.0019%, N:0.0050-0.0058%, surplus are Fe and inevitable impurity.
Further, the welding steel is by the molten steel containing the chemical component is successively cast, steel billet adds
Heat, rolling and stelmor is air-cooled is prepared.
Further, the casting meets at least one of following:
It casts in argon atmosphere；
The average cast temperature of molten steel is 1535-1555 DEG C；
The pulling rate of slab is 1.70-2.2m/min；
Preferably, the pulling rate of slab is 1.70-1.9m/min.
Wherein, molten steel overheat is 25-40 DEG C when casting.
Wherein, the casting is by the way of continuous small-billet casting, in continuous casting step, from ladle-tundish-crystallizer
Overall process protective casting is carried out using immersion long nozzle, covering slag and argon gas, prevent the exposed generation secondary oxidation of molten steel；Control
Casting speed processed stablizes pulling rate, prevents the fluctuation of mold liquid level in 1.70-2.20m/min.
Further, the heating steel billet meets at least one of following:
By heating steel billet to 1150-1200 DEG C, in 1100-1150 DEG C heat preservation 1.0-3.0 hours, total heating time is no more than
5.0 hour；
Preferably, by heating steel billet to 1170-1200 DEG C；
Preferably, steel billet is kept the temperature in 1120-1150 DEG C；
Preferably, soaking time is 1.8-2.7 hours；
Preferably, total heating time is 3.5-4.4 hours.
Further, the laggard horizontal high voltage water de-scaling of heating steel billet, is rolled later.
Preferably, steel billet is come out of the stove at 1000-1050 DEG C carries out high-pressure water descaling.
Wherein, the rolling of φ 5.5mm disk circle is carried out after high-pressure water descaling.
Wherein, the rolling uses high speed wire rolling.
Further, described 850-900 DEG C of roll control entry temperature at finishing, 830-850 DEG C of Dual module inlet temperature is spat
830-850 DEG C of temperature of silk.
Further, at least one of below the air-cooled satisfaction of the stelmor:
Slow cooling mode is postponed using air-cooled roller-way, controls air-cooled roller table speed≤0.25m/s；
Blower and insulation cover are all closed；
Preferably, air-cooled roller table speed is controlled in the range of 0.16-0.25m/s；
Preferably, air-cooled roller table speed is controlled in the range of 0.16-0.24m/s；
Each section of roller table speed is respectively 0.16m/s, 0.18m/s, 0.20m/s, 0.22m/s, 0.24m/s.
The present invention provides the preparation methods of the welding steel: molten steel is successively cast, heating steel billet, rolling and
Stelmor it is air-cooled to get；Wherein, the molten steel is obtained by bessemerizing with ladle refining.
Further, the preparation method meets at least one of following:
On the basis of molten iron total weight, by the control of the C content of blowing end point in 0.03-0.05 weight %, P content≤
0.015 weight %, S content≤0.015 weight %；
Described bessemerize adds carburant, pre-deoxidant, refining slag, Antaciron and manganeisen in tapping process
Enter into ladle so that in obtained molten steel, on the basis of the molten steel total weight, C content be 0.04-0.06 weight %,
Si content is that 0.80-0.85 weight %, Mn content is 1.30-1.40 weight %；
Preferably, the pre-deoxidant is Antaciron；
Preferably, relative to molten steel per ton, the additional amount of the pre-deoxidant is 2.0-3.5 kilograms；
Preferably, relative to molten steel per ton, the additional amount of the refining slag is 2.5-5.0 kilograms；
Argon is carried out to ladle after tapping；
Preferably, Argon is carried out to ladle using the pressure of 0.4-1.0MPa；
Preferably, argon blowing time 8-20min；
Refining slag is added in the ladle refining, and the dosage of refining slag is relative to 3.0-5.0 kilograms of molten steel per ton；
Refining slag is added in the ladle refining, controls ladle basicity of slag between 2.0-4.0, the S content in molten steel is made to exist
0.015 weight % or less；
The chemical component of carburant, Antaciron and/or manganeisen adjustment molten steel is added in the ladle refining；
Temperature after refining is 1570-1595 DEG C；
Refining time is 30-60 minutes；
Preferably, the carburant is one or more kinds of in pitch coke, anthracite, carbon dust.
Wherein, in order to control the content of element Cr, Ni, Cu, As, Ca, Al etc. in welding steel provided by the invention, selection
0.20 weight %, As content < of Cr content < 0.20 weight %, Ni content <, 0.30 weight %, Cu content <, 0.020 weight %
Molten iron or steel scrap as raw material.Also, using the molten iron smelting after desulfurization, the S content controlled into furnace molten iron is less than or equal to
0.015 weight %, using without the deoxidation of Ca, Al alloy.
Wherein, the refining slag is the common high basicity slag in this field.
The present invention provides high silicon content welding steels, mainly have the advantages that
1, welding steel spatter of the present invention is small, appearance of weld is beautiful.
2, welding steel tensile strength of the present invention is 480-530MPa, and elongation percentage A can achieve 36.0-42.0%, section
Shrinking percentage can achieve 79.0-84.0%, meet the requirement of direct drawing diameter 0.6-1.6mm core wire stick silk.
3, welding steel of the present invention has the advantages that even tissue, all ferrites+a small amount of pearlite, wire rod head, middle and end
Mechanical property is uniform.By taking the welding steel that embodiment 1 provides as an example, tensile strength Rm differs 5MPa end to end, elongation A phase
Poor 1.0%, the contraction percentage of area Z difference 4.0%；And use welding steel (comparative example 1) head, middle and end tension of existing method production
Intensity Rm difference reaches 12MPa, elongation A difference 1.0%, contraction percentage of area Z difference 5.0%.
Specific embodiment
The present invention provides high silicon content welding steel, chemical composition comprises the following components in percentage by weight are as follows: C:0.06-
0.09%, Si:0.80-1.10%, Mn:1.40-1.70%, P≤0.020%, S≤0.020%, Cr≤0.15%, Ni≤
0.15%, Cu≤0.15%, Mo≤0.10%, As≤0.020%, Ca≤0.0010%, Al≤0.015%, O≤
0.0050%, N≤0.0080%, surplus are Fe and inevitable impurity.
The present invention passes through the content of C, Si, Mn, P, S in the chemical component of control welding steel in suitable range, and
The content of strict control As, Ca, Al, O, N effectively improve welding steel and splash in the welding process serious problem.
Further, welding steel of the present invention is by the molten steel containing the chemical component is successively cast, steel billet adds
Heat, rolling and stelmor is air-cooled is prepared.
Wherein, the heating steel billet is by heating steel billet to 1150-1200 DEG C, small in 1100-1150 DEG C of heat preservation 1.0-3.0
When, total heating time is no more than 5.0 hours.
Described 850-900 DEG C of roll control entry temperature at finishing, 830-850 DEG C of Dual module inlet temperature, laying temperature
830-850℃。
The stelmor is air-cooled to postpone slow cooling mode using air-cooled roller-way, controls air-cooled roller table speed≤0.25m/s.
The present invention passes through optimization heating steel billet, rolling and the air-cooled process conditions of stelmor, hence it is evident that improves welding rod group
It knits and the plasticity of the uniformity of mechanical property, stability (i.e. the poker characteristic of wire rod) and wire rod, makes steel that there is good drawing
Performance is pulled out, guarantees that fracture of wire, the welding rod of production do not have excellent welding performance during drawing stick silk.
The solution of the present invention is explained below in conjunction with embodiment.It will be understood to those of skill in the art that following
Embodiment is merely to illustrate the present invention, and should not be taken as limiting the scope of the invention.Particular technique or item are not specified in embodiment
Part, it described technology or conditions or is carried out according to the literature in the art according to product description.Agents useful for same or instrument
Production firm person is not specified in device, and being can be with conventional products that are commercially available.In following embodiment, in order to control production institute
The content for obtaining the elements such as Cr, Ni, Cu, As, Ca, Al in welding steel, selects 0.20 weight %, Ni content < 0.30 of Cr content <
The molten iron or steel scrap of 0.20 weight %, As content < of weight %, Cu content <, 0.020 weight % is as raw material.Also, using de-
Molten iron smelting after sulphur, the S content controlled into furnace molten iron are less than or equal to 0.015 weight %.
The preparation of the welding steel of the present invention of embodiment 1
Molten iron after desulfurization, vanadium extraction is poured into oxygen top-blown converter to blow, on the basis of molten steel total weight, works as molten steel
It taps immediately into ladle when middle C content is 0.03 weight %, P content be 0.008 weight %, S content is 0.008 weight %.
When tapping, relative to molten steel per ton, first plus 0.15 kilogram of anthracite (C content is >=93 weight %) carries out carburetting, tapping 1/3
Afterwards, relative to molten steel per ton, pre-deoxidant Antaciron is first added in ladle, and (Si content is 75 weight %, Anyang Heng Wang
Metallurgical Nai Cai Co., Ltd) 3.5 kilograms, then relative to molten steel per ton, 3.5 kilograms of refining slag is added, (Si content is Fe-Si
75 weight %, the permanent prosperous metallurgy Nai Cai Co., Ltd in Anyang) 8.5 kilograms, (Mn content is >=75% to Fe-Mn, and Panzhihua climbs macro smelting
Golden Products Co., Ltd) 19.2 kilograms, carry out the alloying of the elements such as Si, Mn, make be with the total weight of molten steel in gained molten steel
Benchmark, it be 0.70 weight %, Mn content is 1.30 weight % that C content, which is 0.04 weight %, Si content,.
Then, ar blowing refining is carried out to the molten steel in ladle, the time of ar blowing refining is 8 minutes, and argon gas is blown into pressure and is
0.9MPa；After molten steel is sent to LF furnace (130 tons of ladle refining furnaces of electrified heating), slugging is first heated, then relative to per ton
Molten steel is added 3.0 kilograms of refining slag, and to 1600 DEG C, LF refining carries out 35 minutes heating molten steel altogether, and carbon dust, Fe- is then added
The alloys such as Si, Fe-Mn are finely adjusted molten steel composition, make in gained molten steel, on the basis of the total weight of molten steel, C content is
0.06 weight %, Si content be 0.95 weight %, Mn content be 1.60 weight %, P content is that 0.008 weight %, S content is
0.007%, it be 0.004 weight %, Cr content be 0.05 weight %, Ni content is 0.04 weight that Ca, which is 0.0005 weight %, Al,
It is 0.05 weight %, As content is 0.010 weight %, O content 0.0018 that amount %, Cu content, which is 0.05 weight %, Mo content,
Weight %, N content 0.0056%.
It is cast the molten steel after ladle refining to obtain steel billet, casts in argon atmosphere and carry out, molten steel is averagely cast
Temperature is 1535 DEG C.The pulling rate of slab is 1.90m/min.
Using pusher-type furnace heating steel billet to 1170 DEG C, 2.7 hours then are kept the temperature at a temperature of 1120 DEG C, it is total to heat
Time is 4.4 hours.Then tapping carries out high-pressure water descaling and wire rod rolling, controls 850 DEG C of entry temperature at finishing, Dual module enters
830 DEG C of temperature, 830 DEG C of laying temperature of mouth.
The blower of Stanermo wind-cooling linear and insulation cover are all closed, each section of roller table speed 0.16m/s, 0.18m/s,
0.20m/s,0.22m/s,0.24m/s.Then wire rod after cooling is subjected to collection volume, bundling and air-cooled.
The detection method of each ingredient is respectively carbon steel and middle-low alloy steel spark source atomic emission spectrometry analysis method, state
Family's standard is GB/T4336.Oxygen, nitrogen content detection method be PULSE HEATING inert gas fusion-infrared absorption, national standard
For GB/T11261.Tissue, grain size and the uniformity testing result of gained steel are shown in Table 2.
The preparation of the welding steel of the present invention of embodiment 2
Molten iron after desulfurization, vanadium extraction is poured into oxygen top-blown converter to blow, on the basis of molten steel total weight, works as molten steel
It taps immediately into ladle when middle C content is 0.04 weight %, P content be 0.010 weight %, S content is 0.010 weight %.
After tapping 1/3, relative to molten steel per ton, pre-deoxidant Antaciron is first added in ladle, and (Si content is 75 weight %, Anyang
Permanent prosperous metallurgy Nai Cai Co., Ltd, city) 2.9 kilograms, then relative to molten steel per ton, addition 4.0 kilograms of refining slag, Fe-Si (Si
Content is 75 weight %, the permanent prosperous metallurgy Nai Cai Co., Ltd in Anyang) 9.8 kilograms, (Mn content is >=75% to Fe-Mn, Panzhihua
Pan Hong metallurgical product Co., Ltd) 19.9 kilograms, the alloying of the elements such as Si, Mn is carried out, is made in gained molten steel, with the total of molten steel
On the basis of weight, it be 0.74 weight %, Mn content is 1.35 weight % that C content, which is 0.05 weight %, Si content,.
Then, ar blowing refining is carried out to the molten steel in ladle, the time of ar blowing refining is 15 minutes, and argon gas is blown into pressure and is
0.9MPa；After molten steel is sent to LF furnace (130 tons of ladle refining furnaces of electrified heating), slugging is first heated, then relative to per ton
Molten steel is added 4.2 kilograms of refining slag, and to 1615 DEG C, LF refining carries out 52 minutes heating molten steel altogether, and carbon dust, Fe- is then added
The alloys such as Si, Fe-Mn are finely adjusted molten steel composition, make in gained molten steel, on the basis of the total weight of molten steel, C content is
0.07 weight %, Si content be 0.88 weight %, Mn content be 1.51 weight %, P content is that 0.010 weight %, S content is
0.009%, it be 0.004 weight %, Cr content be 0.05 weight %, Ni content is 0.05 weight that Ca, which is 0.0004 weight %, Al,
It is 0.06 weight %, As content is 0.009 weight %, O content 0.0019 that amount %, Cu content, which is 0.04 weight %, Mo content,
Weight %, N content 0.0050%.
It is cast the molten steel after ladle refining to obtain steel billet, casts in argon atmosphere and carry out, molten steel is averagely cast
Temperature is 1542 DEG C.The pulling rate of slab is 1.80m/min.
Using pusher-type furnace heating steel billet to 1190 DEG C, 2.0 hours then are kept the temperature at a temperature of 1140 DEG C, it is total to heat
Time is 4.2 hours.Then tapping carries out high-pressure water descaling and wire rod rolling, controls 880 DEG C of entry temperature at finishing, Dual module enters
840 DEG C of temperature, 840 DEG C of laying temperature of mouth.
The blower of Stanermo wind-cooling linear and insulation cover are all closed, each section of roller table speed 0.16m/s, 0.18m/s,
0.20m/s,0.22m/s,0.24m/s.Then wire rod after cooling is subjected to collection volume, bundling and air-cooled.
The detection method of each ingredient is respectively carbon steel and middle-low alloy steel spark source atomic emission spectrometry analysis method, state
Family's standard is GB/T4336.Oxygen, nitrogen content detection method be PULSE HEATING inert gas fusion-infrared absorption, national standard
For GB/T11261.Tissue, grain size and the uniformity testing result of gained steel are shown in Table 2.
The preparation of the welding steel of the present invention of embodiment 3
Molten iron after desulfurization, vanadium extraction is poured into oxygen top-blown converter to blow, on the basis of molten steel total weight, works as molten steel
It taps immediately into ladle when middle C content is 0.05 weight %, P content be 0.012 weight %, S content is 0.013 weight %.
After tapping 1/3, relative to molten steel per ton, pre-deoxidant Antaciron is first added in ladle, and (Si content is 75 weight %, Anyang
Permanent prosperous metallurgy Nai Cai Co., Ltd, city) 2.0 kilograms, then relative to molten steel per ton, addition 5.0 kilograms of refining slag, Fe-Si (Si
Content is 75 weight %, the permanent prosperous metallurgy Nai Cai Co., Ltd in Anyang) 10.5 kilograms, (Mn content is >=75% to Fe-Mn, climbs branch
Hua Panhong metallurgical product Co., Ltd) 20.7 kilograms, the alloying of the elements such as Si, Mn is carried out, is made in gained molten steel, with molten steel
On the basis of total weight, it be 0.79 weight %, Mn content is 1.40 weight % that C content, which is 0.06 weight %, Si content,.
Then, ar blowing refining is carried out to the molten steel in ladle, the time of ar blowing refining is 20 minutes, and argon gas is blown into pressure and is
0.9MPa；After molten steel is sent to LF furnace (130 tons of ladle refining furnaces of electrified heating), slugging is first heated, then relative to per ton
Molten steel is added 4.0 kilograms of refining slag, and to 1625 DEG C, LF refining carries out 60 minutes heating molten steel altogether, and carbon dust, Fe- is then added
The alloys such as Si, Fe-Mn are finely adjusted molten steel composition, make in gained molten steel, on the basis of the total weight of molten steel, C content is
0.08 weight %, Si content be 0.81 weight %, Mn content be 1.45 weight %, P content is that 0.012 weight %, S content is
0.012%, it be 0.004 weight %, Cr content be 0.05 weight %, Ni content is 0.04 weight that Ca, which is 0.0005 weight %, Al,
It is 0.05 weight %, As content is 0.010 weight %, O content 0.0015 that amount %, Cu content, which is 0.04 weight %, Mo content,
Weight %, N content 0.0058%.
It is cast the molten steel after ladle refining to obtain steel billet, casts in argon atmosphere and carry out, molten steel is averagely cast
Temperature is 1555 DEG C.The pulling rate of slab is 1.70m/min.
Using pusher-type furnace heating steel billet to 1200 DEG C, 1.8 hours then are kept the temperature at a temperature of 1150 DEG C, it is total to heat
Time is 3.5 hours.Then tapping carries out high-pressure water descaling and wire rod rolling, controls 900 DEG C of entry temperature at finishing, Dual module enters
850 DEG C of temperature, 850 DEG C of laying temperature of mouth.
The blower of Stanermo wind-cooling linear and insulation cover are all closed, each section of roller table speed 0.16m/s, 0.18m/s,
0.20m/s,0.22m/s,0.24m/s.Then wire rod after cooling is subjected to collection volume, bundling and air-cooled.
The detection method of each ingredient is respectively carbon steel and middle-low alloy steel spark source atomic emission spectrometry analysis method, state
Family's standard is GB/T4336.Oxygen, nitrogen content detection method be PULSE HEATING inert gas fusion-infrared absorption, national standard
For GB/T11261.Tissue, grain size and the uniformity testing result of gained steel are shown in Table 2.
Comparative example 1 prepares welding steel using existing method
Molten iron after desulfurization, vanadium extraction is poured into oxygen top-blown converter to blow, on the basis of molten steel total weight, works as molten steel
It taps immediately into ladle when middle C content is 0.05 weight %, P content be 0.013 weight %, S content is 0.013 weight %.
After tapping 1/3, relative to molten steel per ton, pre-deoxidant alfer is first added in ladle, and (Al content is 40 weight %, Anyang
Permanent prosperous metallurgy Nai Cai Co., Ltd, city) 3.8 kilograms, then relative to molten steel per ton, addition 4.5 kilograms of refining slag, Fe-Si (Si
Content is 75 weight %, the permanent prosperous metallurgy Nai Cai Co., Ltd in Anyang) 10.5 kilograms, (Mn content is >=75% to Fe-Mn, climbs branch
Hua Panhong metallurgical product Co., Ltd) 19.4 kilograms, the alloying of the elements such as Si, Mn is carried out, is made in gained molten steel, with molten steel
On the basis of total weight, it be 0.71 weight %, Mn content is 1.31 weight % that C content, which is 0.06 weight %, Si content,.
Then, ar blowing refining is carried out to the molten steel in ladle, the time of ar blowing refining is 7 minutes, and argon gas is blown into pressure and is
0.9MPa；After molten steel is sent to LF furnace (130 tons of ladle refining furnaces of electrified heating), slugging is first heated, then relative to per ton
Molten steel is added 4.5 kilograms of refining slag, and to 1626 DEG C, LF refining carries out 50 minutes heating molten steel altogether, and carbon dust, Fe- is then added
The alloys such as Si, Fe-Mn are finely adjusted molten steel composition, make in gained molten steel, on the basis of the total weight of molten steel, C content is
0.08 weight %, Si content be 0.87 weight %, Mn content be 1.48 weight %, P content is that 0.013 weight %, S content is
0.012%, it be 0.05 weight %, Ni content is 0.04 weight that Al content 0.016%, Ca, which are 0.0008 weight %, Cr content,
It is 0.06 weight %, As content is 0.015 weight %, O content 0.0025 that amount %, Cu content, which is 0.04 weight %, Mo content,
Weight %, N content 0.0066%.
It is cast the molten steel after ladle refining to obtain steel billet, casts in argon atmosphere and carry out, molten steel is averagely cast
Temperature is 1556 DEG C.The pulling rate of slab is 2.10m/min.
Using pusher-type furnace heating steel billet to 1200 DEG C, 2.0 hours then are kept the temperature at a temperature of 1180 DEG C, it is total to heat
Time is 3.6 hours.Then tapping carries out high-pressure water descaling and wire rod rolling, controls 940 DEG C of entry temperature at finishing, Dual module enters
910 DEG C of temperature, 910 DEG C of laying temperature of mouth.
The blower of Stanermo wind-cooling linear and insulation cover are all closed, each section of roller table speed 0.22m/s, 0.24m/s,
0.26m/s,0.28m/s,0.30m/s.Then wire rod after cooling is subjected to collection volume, bundling and air-cooled.
The detection method of each ingredient is respectively carbon steel and middle-low alloy steel spark source atomic emission spectrometry analysis method, state
Family's standard is GB/T4336.Oxygen, nitrogen content detection method be PULSE HEATING inert gas fusion-infrared absorption, national standard
For GB/T11261.Tissue, grain size and the uniformity testing result of gained steel are shown in Table 2.
Measuring mechanical property: welding steel prepared by embodiment 1-3 and comparative example 1 carries out mechanicalness by standard sample
It can test, wherein tensile property is carried out according to GB/T228 metal material tensile testing at ambient temperature, detects tensile strength respectively
Rm, elongation A, contraction percentage of area Z.As a result it see the table below:
1 measuring mechanical property result of table
Note: data are that wire rod head, middle and end take double sample inspection results in table.
Tissue, grain size and the uniformity testing result of 2 steel of table
Note: grain size is mean grain size in table.
The performance test results of table 1 show compared with comparative example 1, the welding steel even tissue of embodiment 1-3, wire rod
Head, middle and end mechanical property uniformity is significantly superior.For example, the Rm of the tensile strength end to end difference for the welding steel that embodiment 1 provides
5MPa, elongation A difference 1.0%, contraction percentage of area Z difference 4.0%；And the tension end to end for the welding steel that comparative example 1 provides
Intensity Rm difference reaches 12MPa, elongation A difference 1.0%, contraction percentage of area Z difference 5.0%.
From table 2 it can be seen that the welding steel even tissue of embodiment 1-3, all ferrites+a small amount of pearlite, and
There is abnormal structure's bainite in comparative example.
In addition, the welding wire steel wire rod that comparative example 1 produces generates fracture of wire in user's drawing, and spatter is serious, and real
The welding wire steel wire rod user's drawing for applying 1-3 production is smooth, and spatter is small, appearance of weld is beautiful.
It should be noted that particular features, structures, materials, or characteristics described in this specification can any one or
It can be combined in any suitable manner in multiple embodiments.In addition, without conflicting with each other, those skilled in the art can incite somebody to action
The feature of difference embodiment described in this specification and different embodiments is combined.
Claims (10)
1. high silicon content welding steel, it is characterized in that: its chemical composition comprises the following components in percentage by weight are as follows: C:0.06-0.09%, Si:
0.80-1.10%, Mn:1.40-1.70%, P≤0.020%, S≤0.020%, Cr≤0.15%, Ni≤0.15%, Cu≤
0.15%, Mo≤0.10%, As≤0.020%, Ca≤0.0010%, Al≤0.015%, O≤0.0050%, N≤
0.0080%, surplus is Fe and inevitable impurity.
2. welding steel as described in claim 1, it is characterized in that: its chemical composition comprises the following components in percentage by weight are as follows: C:0.06-
0.08%, Si:0.80-0.95%, Mn:1.45-1.60%, P≤0.015%, S≤0.015%, Cr≤0.15%, Ni≤
0.15%, Cu≤0.15%, Mo≤0.10%, As≤0.015%, Ca≤0.0010%, Al≤0.010%, O≤
0.0040%, N≤0.0070%, surplus are Fe and inevitable impurity；Preferably, chemical composition comprises the following components in percentage by weight
Are as follows: C:0.06-0.08%, Si:0.81-0.95%, Mn:1.45-1.60%, P:0.008-0.012%, S:0.007-
0.012%, Cr:0.05%, Ni:0.04-0.05%, Cu:0.04-0.05%, Mo:0.05-0.06%, As:0.009-
0.010%, Ca:0.0004-0.0005%, Al:0.004%, O:0.0015-0.0019%, N:0.0050-0.0058%, it is remaining
Amount is Fe and inevitable impurity.
3. welding steel as claimed in claim 1 or 2, it is characterized in that: it be will the molten steel containing the chemical component successively
It is cast, heating steel billet, rolling and stelmor is air-cooled is prepared.
4. welding steel as claimed in claim 3, it is characterized in that: at least one of below casting satisfaction:
It casts in argon atmosphere；
The average cast temperature of molten steel is 1535-1555 DEG C；
The pulling rate of slab is 1.70-2.2m/min；
Preferably, the pulling rate of slab is 1.70-1.9m/min.
5. welding steel as claimed in claim 3, it is characterized in that: at least one of below heating steel billet satisfaction:
By heating steel billet to 1150-1200 DEG C, in 1100-1150 DEG C heat preservation 1.0-3.0 hours, total heating time be no more than 5.0
Hour；
Preferably, by heating steel billet to 1170-1200 DEG C；
Preferably, steel billet is kept the temperature in 1120-1150 DEG C；
Preferably, soaking time is 1.8-2.7 hours；
Preferably, total heating time is 3.5-4.4 hours.
6. welding steel as claimed in claim 3, it is characterized in that: the laggard horizontal high voltage water de-scaling of heating steel billet, is rolled later
System；Preferably, steel billet is come out of the stove at 1000-1050 DEG C carries out high-pressure water descaling.
7. welding steel as claimed in claim 3, it is characterized in that: described 850-900 DEG C of roll control entry temperature at finishing, it is double
830-850 DEG C of module inlet temperature, 830-850 DEG C of laying temperature.
8. welding steel as claimed in claim 3, it is characterized in that: at least one of below the air-cooled satisfaction of the stelmor:
Slow cooling mode is postponed using air-cooled roller-way, controls air-cooled roller table speed≤0.25m/s；
Blower and insulation cover are all closed；
Preferably, air-cooled roller table speed is controlled in the range of 0.16-0.25m/s；
Preferably, air-cooled roller table speed is controlled in the range of 0.16-0.24m/s；
Each section of roller table speed is respectively 0.16m/s, 0.18m/s, 0.20m/s, 0.22m/s, 0.24m/s.
9. the preparation method of welding steel described in claim 1~8 any one, it is characterized in that: molten steel is successively cast,
Heating steel billet, rolling and stelmor it is air-cooled to get；Wherein, the molten steel is obtained by bessemerizing with ladle refining.
10. preparation method as claimed in claim 9, it is characterized in that: meeting at least one of following:
On the basis of molten iron total weight, the C content of blowing end point is controlled in 0.03-0.05 weight %, P content≤0.015 weight
Measure %, S content≤0.015 weight %；
Carburant, pre-deoxidant, refining slag, Antaciron and manganeisen are added to by described bessemerize in tapping process
In ladle, so that on the basis of the molten steel total weight, C content is that 0.04-0.06 weight %, Si contains in obtained molten steel
It is 1.30-1.40 weight % that amount, which is 0.80-0.85 weight %, Mn content,；
Preferably, the pre-deoxidant is Antaciron；
Preferably, relative to molten steel per ton, the additional amount of the pre-deoxidant is 2.0-3.5 kilograms；
Preferably, relative to molten steel per ton, the additional amount of the refining slag is 2.5-5.0 kilograms；
Argon is carried out to ladle after tapping；
Preferably, Argon is carried out to ladle using the pressure of 0.4-1.0MPa；
Preferably, argon blowing time 8-20min；
Refining slag is added in the ladle refining, and the dosage of refining slag is relative to 3.0-5.0 kilograms of molten steel per ton；
Refining slag is added in the ladle refining, controls ladle basicity of slag between 2.0-4.0, makes the S content in molten steel 0.015
Weight % or less；
The chemical component of carburant, Antaciron and/or manganeisen adjustment molten steel is added in the ladle refining；
Temperature after refining is 1570-1595 DEG C；
Refining time is 30-60 minutes；
Preferably, the carburant is one or more kinds of in pitch coke, anthracite, carbon dust.
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| CN111424210A (en) * | 2020-03-31 | 2020-07-17 | 江苏省沙钢钢铁研究院有限公司 | Hot-rolled wire rod for welding wire and production method thereof |
| CN112337986A (en) * | 2020-10-21 | 2021-02-09 | 江苏永钢集团有限公司 | Process for improving fracture of high-alloy tool steel wire and high-alloy tool steel wire |
| CN114058819A (en) * | 2021-11-23 | 2022-02-18 | 建龙北满特殊钢有限责任公司 | ER70S-6 hot-rolled wire rod and preparation method thereof |
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