CN107099729A - The ultrafast cold technique productions Thin Specs abrasion-resistant stee NM450 of hot continuous rolling method - Google Patents

The ultrafast cold technique productions Thin Specs abrasion-resistant stee NM450 of hot continuous rolling method Download PDF

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CN107099729A
CN107099729A CN201710204563.6A CN201710204563A CN107099729A CN 107099729 A CN107099729 A CN 107099729A CN 201710204563 A CN201710204563 A CN 201710204563A CN 107099729 A CN107099729 A CN 107099729A
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steel
temperature
carries out
slag
rolling
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CN107099729B (en
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周峰
李烈军
高吉祥
彭政务
孙海波
戴杰涛
鲁艳军
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South China University of Technology SCUT
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    • 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
    • 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
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
    • 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
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
    • 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
    • C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
    • 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
    • C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese

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  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

The invention discloses a kind of ultrafast cold technique productions Thin Specs abrasion-resistant stee NM450 of hot continuous rolling method, including step：Blast-melted, KR takes off S, converter smelting, the refining of RH stoves, the refining of LF stoves, conventional plate blank continuous casting, is cooled to room temperature, slab inspection, casting billet surface and strips off the skin, heating furnace, water under high pressure dephosphorization, roughing, water under high pressure dephosphorization, finish rolling, ultra-rapid cooling, batch, open flat, heating, quenching, tempering, finishing, inspection.The present invention carries out microalloying by rational Alloying Design from micro Cu, Mo, Cr, Nb, Ti, B alloy, passes through ultra-rapid cooling quenching control microstructure after controlled rolling, give full play to the hydrodynamics effect of alloy, the addition of alloy and the usage amount of precious alloy are reduced, and simplifies technique, compared with traditional handicraft, reduce energy consumption, technological process is shortened, alloy addition is reduced, the tough proportioning of steel is improved, social resources are saved, production cost is reduced.

Description

The ultrafast cold technique productions Thin Specs abrasion-resistant stee NM450 of hot continuous rolling method
Technical field
The invention belongs to wear-resisting steel plate manufacturing technology field, more particularly to a kind of ultrafast cold technique productions Thin Specs of hot continuous rolling Abrasion-resistant stee NM450 manufacture method.
Background technology
Abrasion-resistant stee is resistant to the steel of abrasive wear, is widely used in each industrial or agricultural such as metallurgy, mine, building materials and military affairs Antiwear place is needed in production.Wherein wear-resisting steel plate is most widely used, the use of industry is construction machinery production industry, finally Purposes is the industries such as metallurgy, coal, cement, electric power, glass, mine, building materials, ceramics, brick and tile, agricultural.
The traditional processing technology flow of wear-resisting steel plate is：Electric furnace（Converter）Smelting → refining → continuous casting → heating → roughing → Middle base → finish rolling → heat treatment → inspection storage, current country's main manufacturer has Wugang, Wuhan Iron and Steel Plant, Baosteel, Nangang, uses Heavy and medium plate mill or continuous hot-rolling mill are produced compared with think gauge product, and Thin Specs production is difficult, and production cost is high, and plate shape is difficult to protect Card, the production cycle is long, and delivery date is difficult to ensure that, because the yield of domestic Thin Specs wear-resisting steel plate is seldom, it is difficult to meet domestic city The need for, advantage of the external product in quality, and part project with foreign funds machine-building unit are added to abrasion-resistant stee material Be distinctly claimed, cause external the wear-resisting steel plate more occupancy volume in market and the higher market price at home.City of the current country The wear-resisting steel plate of field Thin Specs is mainly Sweden HARDAX, Japan JFE, Germany XAR and the product of Luo Qi steel mills of Finland, and the country is opened Send superior in quality Thin Specs wearing plate and be obviously promoted effect to improving the performance of enterprises and the domestic steel industry structure of adjustment.
The content of the invention
It is an object of the present invention to provide a kind of ultrafast cold technique productions Thin Specs abrasion-resistant stee NM450 of hot continuous rolling method, use Traditional hot continuous rolling production line obtains more excellent finer and closely woven microstructure with reference to ultrafast cold technique, and with high anti-wear performance, Welding performance and corrosion resistance, and the good Thin Specs abrasion-resistant stee of plate shape is can manufacture, production cost is reduced, is shortened Delivery cycle.
To achieve the above object, the technical solution adopted by the present invention is：
A kind of ultrafast cold technique productions Thin Specs abrasion-resistant stee NM450 of hot continuous rolling method, including step：
（1）It is by temperature>1250 DEG C, the molten iron of [S]≤0.020% carries out KR and takes off S, then carries out dry slag and fully takes off Slag treatment, Molten iron drossing reduces and S is returned in converter to bright area >=93% of molten iron, molten iron terminal [S]≤0.0020%,；
（2）Converter smelting is carried out, makees cooling agent with pellet, pellet and iron scale must be added on request；Fluorite answers root Added on a small quantity in batches according to slag situation in stove, steel addition≤3.5kg per ton, during double slags before steel≤5.0kg per ton, blowing end point 2min forbids to add fluorite, and double slag-stopping tappings are carried out using slag retaining cone, floating plug, slag thickness≤42mm, converter tapping ferrosilicon or Person's silicomangan carries out component controlling, and must not carry out deoxidation and alloying using material containing Al；
（3）RH stoves are refined, to after RH, determine and record [O] content in steel with quick Determining oxygen probe, and Steel ladle clearance control exists 400~600mm, molten steel and top slag thickness should be less than 100mm, and liquid steel temperature is 1595 DEG C -1630 DEG C, first carries out RH and gently handles：Very Reciprocal of duty cycle≤500Pa, processing time 15-20 minute, sequentially adds corresponding alloy and carries out alloying, open Pyatyi vavuum pump, enter The processing of row vacuum cycle；
（4）Handle and entered back into the refining of LF stoves, fed aluminum steel and titanium wire or Ti alloys before LF refining is outbound successively, adjusted AlSWith Ti composition, finally carries out B microalloying；
（5）Conventional plate blank continuous casting is carried out, continuous casting is sealed using long nozzle protective casting and Ar, cinder inclusion in the middle carbon-free alkalescence of cladding lid, Using special middle carbon abrasion resistant steel crystallizer protecting residue, degree of superheat control is at 15~25 DEG C, and casting process input crystallizer electromagnetism is stirred Mix, in fan-shaped section using dynamic Continuous Casting Soft Reduction technique, pulling speed of continuous casting is controlled in 1.0~1.2m/min, thickness of strand 220mm；
（6）Slab is cooled to room temperature, slab quality and surface are checked, one layer of continuous casting billet surface epidermis is taken off；
（7）Stove heat is sent into, heat time >=240min in heating furnace, 1180~1260 DEG C of heating-up temperature, slab goes out heating Furnace temperature >=1150 DEG C, are rolled using two-stage control, are rolled for recrystallization zone, and rolling road is reduced under equipment enabled condition It is secondary, improve rolling pass reduction ratio；And the residence time after proper extension bundle, to increase the recrystallization quantity of deformed austenite, make Microstructure homogenization；
（8）Go out the laggard horizontal high voltage water dephosphorization of heating furnace, dephosphorization pressure >=16MPa；
（9）5 ~ 9 passage roughing are carried out after dephosphorization；
（10）Roughing is complete to treat steel temperature drop to 900~950 DEG C or so, carries out the non-recrystallization zone rolling of austenite, it is ensured that non-recrystallization The total reduction in area is more than 45%, suitably increases 3 percentage pass reductions before reduction in pass, particularly finish rolling by rolling power and to the greatest extent may be used Can be larger, it is that subsequent austenite creates favorable conditions to ferritic phase deformed nucleus, increases nucleation sites, to reach refinement iron The purpose of ferritic crystal grain, finishing temperature is controlled close to Ar3 phase transition temperatures as far as possible, final pass reduction ratio≤12%, to ensure Thickness is accurate and plate shape is good, milling train 6 ~ 12mm of exit thickness, 860~920 DEG C of exit temperature at finishing；
（11）Rolled piece go out after milling train using ultra-fast cooling device cool down, cooldown rate be 15 ~ 30 DEG C/s, quenching final temperature be 550 ~ 650℃；
（12）Coiling machine is batched, and carries out stacking cooling；
（13）Send crosscutting heat treatment department to carry out opening flat, open usually steel roll temperature≤60 DEG C, open and steel plate is carried out at ball blast after putting down Reason removes scale on surface；
（14）Steel plate upper and lower surface pill is cleaned out before into heat-treatment furnace, 900~950 DEG C of heat-treatment furnace heating-up temperature is protected 1.5~2h of temperature, carries out Quenching Treatment；
（15）Temperature carries out temper when being down to 300~400 DEG C；
（16）Finishing, inspection are carried out in Precise asymptotics.
Further, step（5）The middle chemical composition of strand and its content that obtained after conventional plate blank continuous casting are：C For 0.20~0.30wt%, Si is 0.2~0.4wt%, and Mn is 1.5~2.0wt%, and Cu is 0.3~0.50wt%, Mo is 0.35~ 0.55wt%, Cr be 0.75~1.20wt%, Nb be 0.03~0.06wt%, Ti be 0.02~0.05wt%, B be 0.0006~ 0.0015wt%, P<0.015wt%, S<0.010wt%, remaining is Fe and impurity.
Further, step（2）In, before the new blow-on of converter 8 stoves and it is big mend after preceding 3 stove must not smelt identical steel grade.
Further, step（13）In, shot blasting velocity≤2 ~ 4m/min, steel plate roughness is 25-55 μm after ball blast.
Further, step（10）In, 6 ~ 12mm of the milling train exit thickness, 860~920 DEG C of exit temperature at finishing.
The present invention carries out continuous casting after refining molten iron and steel scrap through pneumatic steelmaking and RH+LF stoves, hot rolling, press quenching is protected The insulation of temperature hole.Specifically include：Blast-melted → KR takes off S → converter smelting → RH stoves refining → LF stoves refining → conventional plate blank and connected Room temperature → slab inspection → casting billet surface is cast → is cooled to strip off the skin → heating furnace → water under high pressure dephosphorization → roughing → water under high pressure dephosphorization → finish rolling → ultra-rapid cooling → is batched → opened flat → heating → quenching → tempering → finishing → inspection → mark → and judges → enter Storehouse.
The present invention carries out microalloy by rational Alloying Design from micro Cu, Mo, Cr, Nb, Ti, B alloy Change, by ultra-rapid cooling quenching control microstructure after controlled rolling, give full play to the hydrodynamics effect of alloy, reduce and close The addition of gold and the usage amount of precious alloy, and simplify after traditional abrasion-resistant stee hot rolling progress out-line quenching+tempering process, Using the method compared with traditional handicraft, energy consumption is reduced, technological process is shortened, alloy addition is reduced, improved The tough proportioning of steel, saves social resources, reduces production cost.
Embodiment
With reference to embodiment, the invention will be further described, not limiting the scope of the invention.
Embodiment 1
A kind of ultrafast cold technique productions Thin Specs abrasion-resistant stee NM450 of hot continuous rolling method, including step：
（1）The molten iron that temperature is 1300 DEG C, [S] is 0.010% (S mass percent in molten iron) is subjected to KR and takes off S, Ran Houchong Point skim, molten iron drossing reduces and S is returned in converter to the bright area 95% of molten iron, molten iron terminal [the S] (S in molten iron that is 0.0010% Mass percent)；
（2）Carry out converter smelting, before the new blow-on of converter 8 stoves and it is big mend after preceding 3 stove must not smelt this steel grade, cooled down with pellet Agent, pellet and iron scale must be added on request；Fluorite should on a small quantity be added in batches according to slag situation in stove, and steel per ton is added 3.0kg is measured, 2min forbids to add fluorite before steel≤4.8kg per ton, blowing end point during double slags, carried out using slag retaining cone, floating plug Double slag-stopping tappings, slag thickness 38mm, converter tapping carries out component controlling with ferrosilicon or silicomangan, must not use material containing Al Material carries out deoxidation and alloying；
（3）RH stoves are refined, to after RH, determine and record [O] (the O mass percent in steel) in steel with quick Determining oxygen probe Content, Steel ladle clearance control first carries out RH and gently handled in 420mm, molten steel and top slag thickness 86mm, 1600 DEG C of liquid steel temperature：Vacuum 425Pa is spent, 15 minutes processing times, corresponding alloy is sequentially added and carries out alloying, such as ferrosilicon, ferromanganese, ferrochrome, molybdenum-iron, niobium Iron, ferrotianium and metal copper plate etc..Pyatyi vavuum pump is opened, reach capacity vacuum, carry out vacuum cycle processing；
（4）Handle and entered back into the refining of LF stoves, fed aluminum steel and titanium wire or Ti alloys before LF refining is outbound successively, adjusted AlSWith Ti composition, finally carries out B microalloying；
（5）Conventional plate blank continuous casting is carried out, continuous casting is sealed using long nozzle protective casting and Ar, cinder inclusion in the middle carbon-free alkalescence of cladding lid, Using special middle carbon abrasion resistant steel crystallizer protecting residue, degree of superheat control is at 16 DEG C, and casting process puts into M-EMS, Fan-shaped section is controlled in 1m/min, thickness of strand 220mm using dynamic Continuous Casting Soft Reduction technique, pulling speed of continuous casting；
（6）Slab is cooled to room temperature, slab quality and surface are checked, one layer of continuous casting billet surface epidermis is taken off；
（7）Feeding stove heat, the heat time 300min in heating furnace, 1180 DEG C of heating-up temperature, slab goes out furnace temp 1150 DEG C, rolled using two-stage control.For recrystallization zone rolling, rolling pass is reduced under equipment enabled condition, is improved Rolling pass reduction ratio；And the residence time after proper extension bundle, to increase the recrystallization quantity of deformed austenite, make even tissue Change；
（8）Go out the laggard horizontal high voltage water dephosphorization of heating furnace, dephosphorization pressure 16MPa；
（9）5 passage roughing are carried out after dephosphorization；
（10）Roughing is complete to treat steel temperature drop to 900 DEG C or so, finish rolling final pass reduction ratio 7.8%, to ensure that thickness is accurate and plate shape Well, milling train exit thickness 12mm, 860 DEG C of exit temperature at finishing；
（11）Rolled piece goes out using ultra-fast cooling device cooling after milling train, and cooldown rate is 15 DEG C/s, and quenching final temperature is 550 DEG C；
（12）Coiling machine is batched, and carries out stacking cooling；
（13）Send crosscutting heat treatment department to carry out opening flat, open usually 25 DEG C of steel roll temperature, open and Shot Blasting is carried out to steel plate after putting down It is 25 μm to remove steel plate roughness after scale on surface, shot blasting velocity≤2m/min, ball blast；
（14）Steel plate upper and lower surface pill is cleaned out before into heat-treatment furnace, 900 DEG C of heat-treatment furnace heating-up temperature is incubated 2h, Carry out Quenching Treatment；
（15）Temperature carries out temper when being down to 300 DEG C；
（16）Finishing is carried out in Precise asymptotics, is examined.
In the present embodiment, step（5）The middle chemical composition of strand and its content that obtained after conventional plate blank continuous casting are： C is 0.21wt%, and Si is 0.25wt%, and Mn is 1.55wt%, and Cu is 0.35wt%, and Mo is 0.40wt%, and Cr is 1.10wt%, and Nb is 0.03wt%, Ti are 0.03wt%, and B is 0.0010wt%, and P is 0.010wt%, and S is 0.002wt%, and remaining is Fe and inevitable Impurity, through examining, abrasion-resistant stee its yield strength of the present embodiment production is 1150MPa, tensile strength 1325MPa, A50Extension Rate 11.5%, surface Brinell hardness 456HBW, under the conditions of -20 DEG C, Charpy V-arrangement ballistic work is respectively 61J, 63J, 65J, its performance Meet NM400 standard GB/Ts/T24186-2009 technical conditions.
Embodiment 2
A kind of ultrafast cold technique productions Thin Specs abrasion-resistant stee NM450 of hot continuous rolling method, including step：
（1）It it is 1295 DEG C by temperature, [S] carries out KR for the molten iron of 0.018% (S mass percent in molten iron) and take off S, Ran Houjin Row dry slag reduces and S is returned in converter, molten iron terminal [S] is with Slag treatment, molten iron drossing is fully taken off to the bright area 96% of molten iron 0.0010% (S mass percent in molten iron)；
（2）Before the new blow-on of converter 8 stoves and it is big mend after preceding 3 stove must not smelt this steel grade, make cooling agent, pellet and oxygen with pellet Changing iron sheet must add on request；Fluorite should on a small quantity be added in batches according to slag situation in stove, steel addition 3.5kg per ton, double slags When steel 5.0kg per ton, 2min forbids to add fluorite before blowing end point, and double slag-stopping tappings are carried out using slag retaining cone, floating plug, and slag is thick 41mm, converter tapping carries out component controlling with ferrosilicon or silicomangan.Deoxidation must not be carried out using material containing Al with closing Aurification；
（3）RH stoves are refined, to after RH, determine and record [O] (the O mass percent in steel) in steel with quick Determining oxygen probe Content, Steel ladle clearance is controlled in 600mm, molten steel and top slag thickness 95mm, liquid steel temperature：1628 DEG C, first carry out RH and gently handle：Vacuum 420Pa is spent, 20 minutes processing times, corresponding alloy is sequentially added and carries out alloying, such as ferrosilicon, ferromanganese, ferrochrome, molybdenum-iron, niobium Iron, ferrotianium and metal copper plate etc..Pyatyi vavuum pump is opened, reach capacity vacuum, carry out vacuum cycle processing；
（4）Handle and entered back into the refining of LF stoves, fed aluminum steel and titanium wire or Ti alloys before LF refining is outbound successively, adjusted AlSWith Ti composition, finally carries out B microalloying；
（5）Conventional plate blank continuous casting is carried out, continuous casting is sealed using long nozzle protective casting and Ar, cinder inclusion in the middle carbon-free alkalescence of cladding lid, Using special middle carbon abrasion resistant steel crystallizer protecting residue, degree of superheat control is at 25 DEG C, and casting process puts into M-EMS, Fan-shaped section is controlled in 1.2m/min, thickness of strand 220mm using dynamic Continuous Casting Soft Reduction technique, pulling speed of continuous casting；
（6）Slab is cooled to room temperature, slab quality and surface are checked, one layer of continuous casting billet surface epidermis is taken off；
（7）Feeding stove heat, the heat time 360min in heating furnace, 1260 DEG C of heating-up temperature, slab goes out furnace temp 1230 DEG C, rolled using two-stage control.For recrystallization zone rolling, rolling pass is reduced under equipment enabled condition, is improved Rolling pass reduction ratio；And the residence time after proper extension bundle, to increase the recrystallization quantity of deformed austenite, make even tissue Change；
（8）Go out the laggard horizontal high voltage water dephosphorization of heating furnace, dephosphorization pressure 18MPa；
（9）9 passage roughing are carried out after dephosphorization；
（10）Roughing is complete to treat steel temperature drop to 950 DEG C or so, finish rolling final pass reduction ratio 6.8%, to ensure that thickness is accurate and plate shape Well, milling train exit thickness 6mm, 920 DEG C of exit temperature at finishing；
（11）Rolled piece goes out using ultra-fast cooling device cooling after milling train, and cooldown rate is 30 DEG C/s, and quenching final temperature is 650 DEG C；
（12）Coiling machine is batched, and carries out stacking cooling；
（13）Send crosscutting heat treatment department to carry out opening flat, open usually 55 DEG C of steel roll temperature, open and Shot Blasting is carried out to steel plate after putting down It is 50 μm to remove steel plate roughness after scale on surface, shot blasting velocity 4m/min, ball blast；
（14）Steel plate upper and lower surface pill, 950 DEG C of heat-treatment furnace heating-up temperature, insulation are cleaned out before into heat-treatment furnace 1.5h, carries out Quenching Treatment；
（15）Temperature carries out temper when being down to 3400 DEG C；
（16）Finishing, sampling are carried out in Precise asymptotics.
In the present embodiment, step（5）The middle chemical composition of strand and its content that obtained after conventional plate blank continuous casting are： C is 0.28wt%, and Si is 0.38wt%, and Mn is 1.95wt%, and Cu is 0.45wt%, and Mo is 0.38wt%, and Cr is 0.8wt%, and Nb is 0.04wt%, Ti are 0.04wt%, and B is 0.0013wt%, and P is 0.010wt%, and S is 0.002wt%, and remaining is Fe and inevitable Impurity.Through examining, the yield strength of the abrasion-resistant stee of the present embodiment production is 1210MPa, tensile strength 1375MPa, A50Extension Rate 10.5%, surface Brinell hardness 459HBW, under the conditions of -20 DEG C, Charpy V-arrangement ballistic work is respectively 70J, 61J, 65J, its performance Meet NM400 standard GB/Ts/T24186-2009 technical conditions.
Embodiment 3
A kind of ultrafast cold technique productions Thin Specs abrasion-resistant stee NM450 of hot continuous rolling method, including step：
（1）It it is 1290 DEG C by temperature, [S] carries out KR for the molten iron of 0.018% (S mass percent in molten iron) and take off S, Ran Houjin Row dry slag reduces and S is returned in converter, molten iron terminal [S] is with Slag treatment, molten iron drossing is fully taken off to the bright area 96% of molten iron 0.0010% (S mass percent in molten iron), using whole gon technics, finishing slag basicity 3.2；
（2）Before the new blow-on of converter 8 stoves and it is big mend after preceding 3 stove must not smelt this steel grade, make cooling agent, pellet and oxygen with pellet Changing iron sheet must add on request；Fluorite should on a small quantity be added in batches according to slag situation in stove, steel addition 3.2kg per ton, double slags When steel 4.5kg per ton, 2min forbids to add fluorite before blowing end point, and double slag-stopping tappings are carried out using slag retaining cone, floating plug, and slag is thick 41mm, converter tapping carries out component controlling with ferrosilicon or silicomangan, and deoxidation must not be carried out using material containing Al with closing Aurification；
（3）RH stoves are refined, to after RH, determine and record [O] (the O mass percent in steel) in steel with quick Determining oxygen probe Content, Steel ladle clearance is controlled in 500mm, molten steel and top slag thickness 80mm, liquid steel temperature：1615 DEG C, first carry out RH and gently handle：Vacuum 425Pa is spent, 16 minutes processing times, corresponding alloy is sequentially added and carries out alloying, such as ferrosilicon, ferromanganese, ferrochrome, molybdenum-iron, niobium Iron, ferrotianium and metal copper plate etc..Pyatyi vavuum pump is opened, reach capacity vacuum, carry out vacuum cycle processing；
（4）Handle and entered back into the refining of LF stoves, fed aluminum steel and titanium wire or Ti alloys before LF refining is outbound successively, adjusted AlSWith Ti composition, finally carries out B microalloying；
（5）Conventional plate blank continuous casting is carried out, continuous casting is sealed using long nozzle protective casting and Ar, cinder inclusion in the middle carbon-free alkalescence of cladding lid, Using special middle carbon abrasion resistant steel crystallizer protecting residue, degree of superheat control is at 25 DEG C, and casting process puts into M-EMS, Fan-shaped section is controlled in 1.1m/min, thickness of strand 220mm using dynamic Continuous Casting Soft Reduction technique, pulling speed of continuous casting；
（6）Slab is cooled to room temperature, slab quality and surface are checked, one layer of continuous casting billet surface epidermis is taken off；
（7）Feeding stove heat, the heat time 280min in heating furnace, 1240 DEG C of heating-up temperature, slab goes out furnace temp 1210 DEG C, rolled using two-stage control.For recrystallization zone rolling, rolling pass is reduced under equipment enabled condition, is improved Rolling pass reduction ratio；And the residence time after proper extension bundle, to increase the recrystallization quantity of deformed austenite, make even tissue Change；
（8）Go out the laggard horizontal high voltage water dephosphorization of heating furnace, dephosphorization pressure 18MPa；
（9）7 passage roughing are carried out after dephosphorization；
（10）Roughing is complete to treat steel temperature drop to 930 DEG C or so, finish rolling final pass reduction ratio 8.8%, to ensure that thickness is accurate and plate shape Well, milling train exit thickness 8mm, 900 DEG C of exit temperature at finishing；
（11）Rolled piece goes out using ultra-fast cooling device cooling after milling train, and cooldown rate is 25 DEG C/s, and quenching final temperature is 600 DEG C；
（12）Coiling machine is batched, and carries out stacking cooling；
（13）Send crosscutting heat treatment department to carry out opening flat, open usually 25 DEG C of steel roll temperature, open and Shot Blasting is carried out to steel plate after putting down It is 35 μm to remove steel plate roughness after scale on surface, shot blasting velocity 3m/min, ball blast；
（14）Steel plate upper and lower surface pill, 920 DEG C of heat-treatment furnace heating-up temperature, insulation are cleaned out before into heat-treatment furnace 1.8h, carries out Quenching Treatment；
（15）Temperature carries out temper when being down to 350 DEG C；
（16）Finishing, sampling are carried out in Precise asymptotics.
In the present embodiment, step（5）The middle chemical composition of strand and its content that obtained after conventional plate blank continuous casting are： C is 0.25wt%, and Si is 0.30wt%, and Mn is 1.75wt%, and Cu is 0.41wt%, and Mo is 0.42wt%, and Cr is 0.92wt%, and Nb is 0.06wt%, Ti are 0.05wt%, and B is 0.0007wt%, and P is 0.010wt%, and S is 0.002wt%, and remaining is Fe and inevitable Impurity.The yield strength of the abrasion-resistant stee of the present embodiment production is 1185MPa, tensile strength 1305MPa, A50Elongation percentage 12.5%, Surface Brinell hardness 449HBW, under the conditions of -20 DEG C, Charpy V-arrangement ballistic work is respectively 72J, 75J, 68J, and its performance meets NM400 Standard GB/T/T24186-2009 technical conditions.
Embodiment 4
A kind of ultrafast cold technique productions Thin Specs abrasion-resistant stee NM450 of hot continuous rolling method, including step：
（1）It it is 1310 DEG C by temperature, [S] carries out KR for the molten iron of 0.018% (S mass percent in molten iron) and take off S, Ran Houjin Row dry slag reduces and S is returned in converter, molten iron terminal [S] is with Slag treatment, molten iron drossing is fully taken off to the bright area 96% of molten iron 0.0010% (S mass percent in molten iron), using whole gon technics, finishing slag basicity 3.2；
（2）Carry out converter smelting, before the new blow-on of converter 8 stoves and it is big mend after preceding 3 stove must not smelt this steel grade, cooled down with pellet Agent, pellet and iron scale must be added on request；Fluorite should on a small quantity be added in batches according to slag situation in stove, and steel per ton is added 3.2kg is measured, 2min forbids to add fluorite before steel 4.5kg per ton, blowing end point during double slags, carried out using slag retaining cone, floating plug double Slag-stopping tapping, slag thickness 41mm, converter tapping carries out component controlling with ferrosilicon or silicomangan.Material containing Al must not be used Carry out deoxidation and alloying；
（3）RH stoves are refined, to after RH, determine and record [O] (the O mass percent in steel) in steel with quick Determining oxygen probe Content, Steel ladle clearance is controlled in 480mm, molten steel and top slag thickness 85mm, liquid steel temperature：1625 DEG C, first carry out RH and gently handle：Vacuum 445Pa is spent, 18 minutes processing times, corresponding alloy is sequentially added and carries out alloying, such as ferrosilicon, ferromanganese, ferrochrome, molybdenum-iron, niobium Iron, ferrotianium and metal copper plate etc..Pyatyi vavuum pump is opened, reach capacity vacuum, carry out vacuum cycle processing；
（4）Handle and entered back into the refining of LF stoves, fed aluminum steel and titanium wire or Ti alloys before LF refining is outbound successively, adjusted AlSWith Ti composition, finally carries out B microalloying；
（5）Conventional plate blank continuous casting is carried out, continuous casting is sealed using long nozzle protective casting and Ar, cinder inclusion in the middle carbon-free alkalescence of cladding lid, Using special middle carbon abrasion resistant steel crystallizer protecting residue, degree of superheat control is at 20 DEG C, and casting process puts into M-EMS, Fan-shaped section is controlled in 1.1m/min, thickness of strand 220mm using dynamic Continuous Casting Soft Reduction technique, pulling speed of continuous casting；
（6）Slab is cooled to room temperature, slab quality and surface are checked, one layer of continuous casting billet surface epidermis is taken off；
（7）Feeding stove heat, the heat time 290min in heating furnace, 1260 DEG C of heating-up temperature, slab goes out furnace temp 1220 DEG C, rolled using two-stage control.For recrystallization zone rolling, rolling pass is reduced under equipment enabled condition, is improved Rolling pass reduction ratio；And proper extension rolls the rear residence time, to increase the recrystallization quantity of deformed austenite, make even tissue Change；
（8）Go out the laggard horizontal high voltage water dephosphorization of heating furnace, dephosphorization pressure 18MPa；
（9）7 passage roughing are carried out after dephosphorization；
（10）Roughing is complete to treat steel temperature drop to 930 DEG C or so, finish rolling final pass reduction ratio 6.5%, to ensure that thickness is accurate and plate shape Well, milling train exit thickness 10mm, 900 DEG C of exit temperature at finishing；
（11）Rolled piece goes out using ultra-fast cooling device cooling after milling train, and cooldown rate is 20 DEG C/s, and quenching final temperature is 580 DEG C；
（12）Coiling machine is batched, and carries out stacking cooling；
（13）Send crosscutting heat treatment department to carry out opening flat, open usually 25 DEG C of steel roll temperature, open and Shot Blasting is carried out to steel plate after putting down It is 35 μm to remove steel plate roughness after scale on surface, shot blasting velocity 3m/min, ball blast；
（14）Steel plate upper and lower surface pill, 920 DEG C of heat-treatment furnace heating-up temperature, insulation are cleaned out before into heat-treatment furnace 1.8h, carries out Quenching Treatment；
（15）Temperature carries out temper when being down to 350 DEG C；
（16）Finishing, sampling are carried out in Precise asymptotics.
In the present embodiment, step（5）The middle chemical composition of strand and its content that obtained after conventional plate blank continuous casting are： C is 0.20wt%, and Si is 0.25wt%, and Mn is 1.75wt%, and Cu is 0.35wt%, and Mo is 0.40wt%, and Cr is 1.05wt%, and Nb is 0.05wt%, Ti are 0.04wt%, and B is 0.0007wt%, and P is 0.010wt%, and S is 0.002wt%, and remaining is Fe and inevitable Impurity.The yield strength of the abrasion-resistant stee of the present embodiment production is 1195MPa, tensile strength 1315MPa, A50Elongation percentage 11.5%, Surface Brinell hardness 456HBW, under the conditions of -20 DEG C, Charpy V-arrangement ballistic work is respectively 60J, 67J, 61J, and its performance meets NM400 Standard GB/T/T24186-2009 technical conditions.
The above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not to the present invention Embodiment restriction.For those of ordinary skill in the field, it can also make on the basis of the above description Other various forms of changes or variation.There is no necessity and possibility to exhaust all the enbodiments.It is all the present invention Any modifications, equivalent substitutions and improvements made within spirit and principle etc., should be included in the protection of the claims in the present invention Within the scope of.

Claims (5)

1. a kind of ultrafast cold technique productions Thin Specs abrasion-resistant stee NM450 of hot continuous rolling method, it is characterised in that including step：
（1）By temperature>1250 DEG C, the molten iron of [S]≤0.020% carries out KR and takes off S, then carries out dry slag and fully takes off Slag treatment, iron Water is skimmed to bright area >=93% of molten iron, reduces and S is returned in converter, and molten iron terminal [S]≤0.0020%, whole process uses Argon work Skill, finishing slag basicity 3.0-3.5；
（2）Converter smelting is carried out, makees cooling agent with pellet, pellet and iron scale must be added on request；Fluorite answers root Added on a small quantity in batches according to slag situation in stove, steel addition≤3.5kg per ton, during double slags before steel≤5.0kg per ton, blowing end point 2min forbids to add fluorite, and double slag-stopping tappings are carried out using slag retaining cone, floating plug, slag thickness≤42mm, converter tapping ferrosilicon or Person's silicomangan carries out component controlling, and must not carry out deoxidation and alloying using material containing Al；
（3）RH stoves are refined, to after RH, determine and record [O] content in steel with quick Determining oxygen probe, and Steel ladle clearance control exists 400~600mm, molten steel and top slag thickness should be less than 100mm, and liquid steel temperature is 1595 DEG C -1630 DEG C, first carries out RH and gently handles：Very Reciprocal of duty cycle≤500Pa, processing time 15-20 minute, sequentially adds corresponding alloy and carries out alloying, open Pyatyi vavuum pump, enter The processing of row vacuum cycle；
（4）Handle and entered back into the refining of LF stoves, fed aluminum steel and titanium wire or Ti alloys before LF refining is outbound successively, adjusted AlSWith Ti composition, finally carries out B microalloying；
（5）Conventional plate blank continuous casting is carried out, continuous casting is sealed using long nozzle protective casting and Ar, cinder inclusion in the middle carbon-free alkalescence of cladding lid, Using special middle carbon abrasion resistant steel crystallizer protecting residue, degree of superheat control is at 15 ~ 25 DEG C, and casting process input crystallizer electromagnetism is stirred Mix, in fan-shaped section using dynamic Continuous Casting Soft Reduction technique, pulling speed of continuous casting is controlled in 1.0 ~ 1.2m/min, thickness of strand 220mm；
（6）Slab is cooled to room temperature, slab quality and surface are checked, one layer of continuous casting billet surface epidermis is taken off；
（7）Feeding stove heat, heat time >=240min in heating furnace, 1180 ~ 1260 DEG C of heating-up temperature, slab goes out heating furnace Temperature >=1150 DEG C, are rolled using two-stage control, are rolled for recrystallization zone, and rolling road is reduced under equipment enabled condition It is secondary, improve rolling pass reduction ratio；And the residence time after proper extension bundle；
（8）Go out the laggard horizontal high voltage water dephosphorization of heating furnace, dephosphorization pressure >=16MPa；
（9）5 ~ 9 passage roughing are carried out after dephosphorization；
（10）Roughing is complete to treat steel temperature drop to 900~950 DEG C or so, carries out the non-recrystallization zone rolling of austenite, it is ensured that non-recrystallization The total reduction in area is more than 45%, suitably increases 3 percentage pass reductions before reduction in pass, particularly finish rolling by rolling power and to the greatest extent may be used Can be larger, finishing temperature is controlled close to Ar3 phase transition temperatures as far as possible, final pass reduction ratio≤12%, to ensure thickness essence True and plate shape is good；
（11）Rolled piece go out after milling train using ultra-fast cooling device cool down, cooldown rate be 15 ~ 30 DEG C/s, quenching final temperature be 550 ~ 650℃；
（12）Coiling machine is batched, and carries out stacking cooling；
（13）Send crosscutting heat treatment department to carry out opening flat, open usually steel roll temperature≤60 DEG C, open and steel plate is carried out at ball blast after putting down Reason removes scale on surface；
（14）Steel plate upper and lower surface pill is cleaned out before into heat-treatment furnace, 900~950 DEG C of heat-treatment furnace heating-up temperature is protected 1.5~2h of temperature, carries out Quenching Treatment；
（15）Temperature carries out temper when being down to 300~400 DEG C；
（16）Finishing, inspection are carried out in Precise asymptotics.
2. according to the method described in claim 1, it is characterised in that：Step（5）The middle casting obtained after conventional plate blank continuous casting The chemical composition and its content of base be：C is 0.20~0.30wt%, and Si is 0.2~0.4wt%, and Mn is 1.5~2.0wt%, and Cu is 0.3~0.50wt%, Mo be 0.35~0.55wt%, Cr be 0.75~1.20wt%, Nb be 0.03~0.06wt%, Ti be 0.02~ 0.05wt%, B are 0.0006~0.0015wt%, P<0.015wt%, S<0.010wt%, remaining is Fe and impurity.
3. according to the method described in claim 1, it is characterised in that：Step（2）In, before the new blow-on of converter 8 stoves and it is big mend after preceding 3 Stove must not smelt identical steel grade.
4. according to the method described in claim 1, it is characterised in that：Step（13）In, shot blasting velocity≤2 ~ 4m/min, after ball blast Steel plate roughness is 25-55 μm.
5. according to the method described in claim 1, it is characterised in that：Step（10）In, 6 ~ 12mm of the milling train exit thickness, essence Roll 860~920 DEG C of outlet temperature.
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108517465A (en) * 2018-05-15 2018-09-11 马钢(集团)控股有限公司 A kind of niobium titanium chromium-boron alloy abrasion-resistant stee and preparation method thereof
CN108531810A (en) * 2018-05-15 2018-09-14 马鞍山钢铁股份有限公司 A kind of super-high strength steel hot-rolled substrate and preparation method thereof
CN109182666A (en) * 2018-11-12 2019-01-11 南京钢铁股份有限公司 A kind of width thin gauge NM450 abrasion-resistant stee steel plate and manufacturing method
CN110964979A (en) * 2019-12-05 2020-04-07 邯郸钢铁集团有限责任公司 Wear-resistant steel with good forming performance for dumper carriage and production method thereof
CN111304426A (en) * 2020-03-31 2020-06-19 湖南华菱湘潭钢铁有限公司 Production method of high-strength steel sheet
CN111993216A (en) * 2020-07-02 2020-11-27 山西太钢不锈钢股份有限公司 Method for manufacturing duplex stainless steel hot-rolled middle plate with surface roughness Ra less than or equal to 5 mu m
CN112695251A (en) * 2020-12-21 2021-04-23 本钢板材股份有限公司 Production method of thick seaside building structure steel S355G11M hot-rolled coil
CN113201682A (en) * 2021-04-15 2021-08-03 华南理工大学 Bainite weathering steel and production method thereof
CN113249644A (en) * 2021-03-24 2021-08-13 江阴兴澄特种钢铁有限公司 Thin NM450 steel plate and manufacturing method thereof
WO2023050508A1 (en) * 2021-09-28 2023-04-06 材谷金带(佛山)金属复合材料有限公司 08al steel/316 stainless steel electroslag remelting and rolling method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003293097A (en) * 2002-04-03 2003-10-15 Sumitomo Special Metals Co Ltd Rapidly solidified alloy for nano-composite magnet, and its manufacturing method
CN105200337A (en) * 2014-06-23 2015-12-30 鞍钢股份有限公司 High-strength abrasion-resisting steel plate and production method thereof
CN106498295A (en) * 2016-11-17 2017-03-15 哈尔滨光霞金属材料有限公司 High-strength abrasion-proof steel and its manufacture method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003293097A (en) * 2002-04-03 2003-10-15 Sumitomo Special Metals Co Ltd Rapidly solidified alloy for nano-composite magnet, and its manufacturing method
CN105200337A (en) * 2014-06-23 2015-12-30 鞍钢股份有限公司 High-strength abrasion-resisting steel plate and production method thereof
CN106498295A (en) * 2016-11-17 2017-03-15 哈尔滨光霞金属材料有限公司 High-strength abrasion-proof steel and its manufacture method

Cited By (14)

* Cited by examiner, † Cited by third party
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CN108531810A (en) * 2018-05-15 2018-09-14 马鞍山钢铁股份有限公司 A kind of super-high strength steel hot-rolled substrate and preparation method thereof
CN108517465B (en) * 2018-05-15 2019-06-28 马钢(集团)控股有限公司 A kind of niobium titanium chromium-boron alloy abrasion-resistant stee and preparation method thereof
CN108531810B (en) * 2018-05-15 2019-11-12 马鞍山钢铁股份有限公司 A kind of super-high strength steel hot-rolled substrate and preparation method thereof
CN109182666A (en) * 2018-11-12 2019-01-11 南京钢铁股份有限公司 A kind of width thin gauge NM450 abrasion-resistant stee steel plate and manufacturing method
CN110964979A (en) * 2019-12-05 2020-04-07 邯郸钢铁集团有限责任公司 Wear-resistant steel with good forming performance for dumper carriage and production method thereof
CN111304426A (en) * 2020-03-31 2020-06-19 湖南华菱湘潭钢铁有限公司 Production method of high-strength steel sheet
CN111993216A (en) * 2020-07-02 2020-11-27 山西太钢不锈钢股份有限公司 Method for manufacturing duplex stainless steel hot-rolled middle plate with surface roughness Ra less than or equal to 5 mu m
CN111993216B (en) * 2020-07-02 2022-07-22 山西太钢不锈钢股份有限公司 Method for manufacturing duplex stainless steel hot-rolled middle plate with surface roughness Ra less than or equal to 5 mu m
CN112695251A (en) * 2020-12-21 2021-04-23 本钢板材股份有限公司 Production method of thick seaside building structure steel S355G11M hot-rolled coil
CN113249644A (en) * 2021-03-24 2021-08-13 江阴兴澄特种钢铁有限公司 Thin NM450 steel plate and manufacturing method thereof
CN113201682A (en) * 2021-04-15 2021-08-03 华南理工大学 Bainite weathering steel and production method thereof
CN113201682B (en) * 2021-04-15 2022-05-24 华南理工大学 Bainite weathering steel and production method thereof
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