CN102310077B - Method for continuously reducing, rolling and compositing stainless steel/plain steel composite plate and device thereof - Google Patents
Method for continuously reducing, rolling and compositing stainless steel/plain steel composite plate and device thereof Download PDFInfo
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- CN102310077B CN102310077B CN 201010212721 CN201010212721A CN102310077B CN 102310077 B CN102310077 B CN 102310077B CN 201010212721 CN201010212721 CN 201010212721 CN 201010212721 A CN201010212721 A CN 201010212721A CN 102310077 B CN102310077 B CN 102310077B
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Abstract
The invention discloses a method for continuously reducing, rolling and compositing stainless steel/plain steel composite plate and a device thereof. The method comprises the following steps of: cleaning the surface of a stainless steel plate strip; heating and dephosphorizing a plain steel plate blank; reducing an oxidized iron sheet on the surface of the plain steel plate blank; heating the stainless steel plate strip; rolling and laminating; and cooling. The device used for the method comprises: a steel billet inlet guide roller, a steel billet inlet sealing guide mouth, a front-section heat-insulation reduction furnace, a steel billet running roller way, a sealing water tank, a steel wire brush, a stainless steel plate strip uncoiling machine, a stainless steel plate strip inlet sealing guide mouth, a stainless steel plate strip inlet guide roller, a middle-section reducing-atmosphere heating furnace, a heater, a heat-insulating layer, a stainless steel plate strip running roller way, a guide roller, a rolling mill inlet guide roller, a rolling mill inlet sealing guide and guard, a roughing mill, a protective gas inlet pipeline, a heat-insulating furnace between frames, a finishing mill and a protective gas water-cooling tank body. With the adoption of the method and the device, stainless steel composite plate blanks and plate strip materials can be continuously produced.
Description
Technical field
The present invention relates to metallic composite production method and device thereof, particularly the rolling complex method of continuous reduction and the device thereof of a kind of stainless steel/ordinary steel composite plate.
Background technology
Stainless steel composite plate is normally done plane materiel with stainless steel, be base material with ordinary steel (comprising steel that structural carbon steel, structural alloy steel and other prices are lower etc.), be integral the different composite board of multilayer material that forms by combined in various manners, it has the low advantage of high-strength valency of stainless antirust anti-corrosion and ordinary steel concurrently, has the incomparable advantage of the pure stainless steel of same specification in cost performance, therefore, stainless steel composite plate just has been subjected to people's great attention always since being born.
At present, the production of stainless steel clad plate still based on solid-solid phase is compound, Gu connect the most ripe in the-solid phase complex technique especially with explosive welding and vacuum diffusion welding, but the composite plate blanks interface bond strength that adopts these two kinds of methods to produce is lower, need to improve interface bond strength by follow-up rolling mill practice, this just causes lumber recovery low, the problem that production cost is high.In addition, these two kinds of methods are all produced in individual mode, can not realize continuous production, and therefore, production efficiency is low, and side cut crop end equal loss amount is bigger, so lumber recovery is also lower, these problems have all hindered applying of the compound composite board of stainless steel.
Patent documentation CN1126616C discloses a kind of manufacture of bimetallic composite band, this patent documentation is rolled the method for preparing bimetallic composite band after having described and having utilized electric induction with two kinds of metal sheet band heating, the preparation method is relatively simple, but adopt electric induction that two kinds of metal sheet bands evenly are heated to rolling combined temp in advance great difficulty is arranged, even so, the compound material that adopts in this patent documentation also is metal tape, the surface area of metal tape is relatively big, it is higher to deal with the technology cost, and surface oxidation easily.Patent documentation CN201385171Y disclose a kind of stainless steel clad plate De Gu ?the solid phase continuous braze welding rolling device; it is raw material that this patent documentation has been described with the hot-strip after the pickling; milling train is placed the protective atmosphere device of sealing; the temperature that makes the roll bending of cleaning out be heated to technological requirement in the protective atmosphere stove is also finished rolling composite methods subsequently; though the raw thickness that this method adopts increases; improved combined efficiency; but still exist specific area excessive; the surface is problem of oxidation easily; in addition, it is also very big to adopt hermetically-sealed construction that whole rolling is protected difficulty with protective atmosphere.Patent documentation CN201346897Y discloses a kind of high performance double metal stainless steel clad plate, it is matrix that this patent documentation has been described with the carbon steel sheet, with the clad stainless steel body, adopt the interlayer adding additives to coat the heating back continuously and produce thin specification composite plate in rolling method, even the crimp force the when subject matter of this method is curled is very big, also the interlevel oxidation phenomenon can occur when heating, interlayer adds solder in addition also can increase cost again.
The invention provides the rolling complex method of continuous reduction and the device thereof of a kind of stainless steel/ordinary steel composite plate, is the continuous compound production stainless steel clad plate base of raw material and strip material with solid stainless steel band and common steel billet.Utilize this method and apparatus, can high efficiency, low cost, continuously produce stainless steel clad plate base and strip material in high quality.
Summary of the invention
The rolling complex method of continuous reduction of stainless steel provided by the invention/ordinary steel composite plate is characterized in that this method may further comprise the steps:
A. stainless steel sheet strip removing surface: adopt conventional acid wash to remove the iron scale of corrosion resistant plate belt surface, and use wire brush will treat to curl behind the compound stainless-steel sheet belt surface hacking standby;
B. the heating of ordinary steel slab and dephosphorization: the ordinary steel slab placed in the conventional flame furnace be heated to 950 ℃～1250 ℃, the back of coming out of the stove utilizes conventional water under high pressure to remove scale on surface, sends to immediately afterwards in the reducing atmosphere stove;
C. the reduction of ordinary steel slab scale on surface: the ordinary steel slab after the dephosphorization is sent in the reducing atmosphere stove, in this reduction furnace, feed reducibility gas, through after the reaction of certain hour, being reduced property of the iron scale gas reduction on ordinary steel slab surface;
D. the heating of stainless steel sheet strip: when the ordinary steel slab reduces in the reducing atmosphere stove, the stainless steel sheet strip of preprepared surface clean is imported in this reducing atmosphere stove, and by the heater of body of heater outer setting stainless steel sheet strip is carried out Fast Heating, be heated to 950～1250 ℃ of compound desired temperature until stainless steel sheet strip;
E. rolling pressing: the stainless steel sheet strip that will be heated to 950～1250 ℃, be reduced the clean direct milling train that imports in ordinary steel slab combination back with iron scale and be rolled pressing, for improving the bond strength between matrix and the coating, composite plate blanks is carried out the rolling pressing of 2～10 passages, and under protective atmosphere, carry out when rolling, until the composite plate blanks that obtains any surface finish or strip material;
F. cooling: after the rolling pressing, the stainless steel clad plate base that obtains, the laggard line space of direct shearing scale is cold, and the stainless steel clad sheet material that obtains adopts the cooling of protectiveness recyclegas or water-cooled, becomes the hot-rolled finished product volume after curling.
The device that the rolling complex method of the continuous reduction of stainless steel provided by the invention/ordinary steel composite plate adopts is characterized in that this device comprises with lower member:
Steel billet entrance deflector roll; the steel billet inlet seal is led mouth; the reducing gas outlet conduit; leading portion insulation reduction furnace; steel billet operation roller-way; sealed cistern; wire brush; leading portion reducing gas inlet duct; the stainless steel sheet strip uncoiler; the stainless steel sheet strip inlet seal is led mouth; corrosion resistant plate tape entry guide roller; stage casing reducing atmosphere heating furnace; heater; heat-insulation layer; corrosion resistant plate tape running roller-way; stage casing reducing gas inlet duct; guide roller; milling train entrance deflector roll; the guide and guard of milling train inlet seal; roughing mill; the gas atmosphere inlet pipeline; holding furnace between frame; finishing mill; protective gas water-cooled casing; the cooling water inlet pipeline; the coolant outlet pipeline.
Installing initial is steel billet entrance deflector roll; what be right after the entrance deflector roll is that the steel billet inlet seal is led mouth; it then is leading portion insulation reduction furnace; the steel billet inlet seal is led mouth and is connected with the furnace sealing of leading portion insulation reduction furnace; next be stage casing reducing atmosphere heating furnace again; stage casing reducing gas inlet duct is set on the reducing atmosphere heating furnace of stage casing; leading portion insulation reduction furnace and stage casing reducing atmosphere heating furnace constitute the reducing atmosphere stove jointly; the body of heater of reducing atmosphere stove adopts the heat-resisting alloy steel welding to make; purpose is that the control reducibility gas flows in burner hearth and the scale on surface of the steel billet that enters burner hearth is reduced; the stainless steel band that enters burner hearth is heated; the outside refractory material heat-insulation layer that adopts of the body of heater of reducing atmosphere stove is incubated; between the body of heater of stage casing reducing atmosphere heating furnace and heat-insulation layer, also be provided with heater; the heater heating element heater is resistance wire; or be the burner of fuel with coal gas; the length of stage casing reducing atmosphere heating furnace is 15～30 meters; 20～45 meters of the length of whole reducing atmosphere stove; the width of reducing atmosphere stove should be greater than the width of composite plate blanks or strip material; the reducing atmosphere furnace interior also is furnished with steel billet operation roller-way and stainless steel band operation roller-way; and be furnished with wire brush and sealed cistern for the billet surface hacking in the burner hearth porch; lead mouth one end at inlet seal and be furnished with the reducing gas outlet conduit; upper and lower surface is furnished with the reducing gas inlet duct respectively at the rear portion of reducing atmosphere stove; between leading portion insulation reduction furnace and stage casing reducing atmosphere heating furnace, be furnished with the stainless steel band inlet seal and lead mouth and stainless steel band guide roller; be used for importing stainless steel sheet strip and sealing reducibility gas; its outside arranges two stainless steel belt uncoilers that are used for opening stainless steel band; in addition; end at stage casing reducing atmosphere heating furnace also arranges a pair of guide roller for combination ordinary steel slab and stainless steel sheet strip; be one section body of heater that highly forces down reduced cross-sectional afterwards; to guarantee that gas passes through billet surface at a high speed; be milling train entrance deflector roll and the guide and guard of milling train inlet seal then; the two all is correctly to import milling train for the raw material after will making up; be roughing mill after the guide and guard of milling train inlet seal; the inner water flowing cooling of roughing mill roll; be holding furnace between frame after the roughing mill; the gas atmosphere inlet pipeline is arranged on the holding furnace; the body of heater of holding furnace also is to adopt the heat-resisting alloy steel welding to make between frame; play the composite plate blanks insulation; effects such as composite plate blanks surface anti-oxidation and guide and guard; its inner protective gas that feeds; the slick and sly contact between its two ends and the rolling mill roll; finishing mill is set after the holding furnace between frame; the inner water flowing cooling of finishing mill roll; after the finishing mill protective gas water-cooled casing is set, on the protective gas water-cooled casing cooling water inlet pipeline is arranged; the coolant outlet pipeline.
The device that the rolling complex method of the continuous reduction of described stainless steel/ordinary steel composite plate adopts; wherein protective gas water-cooled casing adopts the ordinary steel welding to make; constitute by the inside and outside is two-layer; nexine is inner to feed protective gas to the cooling that circulates of the slab after compound; feeding cooling water in the outer field interlayer again cools off the protective gas that circulates; the length of protective gas water-cooled casing should reach 4～30 meters, satisfies composite plate blanks or strip material are cooled to get final product below 100～200 ℃.
The device that the rolling complex method of the continuous reduction of described stainless steel/ordinary steel composite plate adopts also is furnished with cutter or crimping machine at the rear portion of protective gas water-cooled casing.
Substantive distinguishing features and obvious improvement that the present invention gives prominence to are mainly reflected in:
(1) compares with existing stainless steel composite plate production method, raw material of the present invention is ordinary steel slab and stainless steel roll bending, can be undertaken compound by any thickness ratio between the two, especially be more suitable for stainless steel and ordinary steel thickness less than the stainless steel composite plate production of 1:10, therefore, can produce the thinner composite plate blanks of coating or composite board band.
(2) compare with existing stainless steel composite plate production method, ordinary steel raw material of the present invention is slab, the heating of slab is finished in common flame furnace, send to again in the reduction furnace after the heating high temperature scale on surface is reduced, in reduction furnace, only the stainless steel roll bending is heated, therefore, the required thermic load of reduction furnace is low, recovery time is short, the reduction furnace small scale, and equipment investment is few.
(3) ordinary steel slab of the present invention had been heated to high temperature before entering reduction furnace, in reduction furnace, just reduce the iron scale of billet surface, when iron scale is reduced, the stainless steel roll bending also has been heated to the temperature of technological requirement, afterwards, the two in the reducing atmosphere stove by moment continuous rolling compound, and rolling required total deformation is bigger, the rolling rhythm time is longer, therefore, can realize reducing, heating and rolling synchronous production;
(4) slab of the present invention is to utilize common flame furnace to heat out, rolling equipment and existing rolling equipment are basic identical, only need transform a little existing equipment and can satisfy production requirement, the reducing atmosphere stove can independently be installed in the roughing mill front, therefore, technical scheme proposed by the invention is particularly suitable for producing stainless steel clad plate base or composite board after the existing hot-rolled strip production line transformation;
(5) in the recombination process, combination between stainless steel cladding plate and the ordinary steel substrate is by the rolling pressing of powerful draught pressure of milling train, and along with continuing of the several passages in back is rolling, the total deformation of composite plate blanks is very big, machinery between the interface be pressed into and high temperature under the atom diffusion significantly strengthen, therefore, the interface bond strength height, the interface recombination rate can reach 100%, quality of finished product good;
(6) milling train of the present invention disposes the roll of inner water flowing cooling, can control the temperature of roll barrel by conciliation water temperature, hydraulic pressure, the water yield; Use this technology and equipment not only can produce double-layer metal material composite plate blanks and composite board band continuously, can also produce multiple layer metal material composite plate blanks and composite board band continuously, be particularly suitable for producing continuously stainless steel clad plate base and composite board band.
Description of drawings
Fig. 1 is the device schematic diagram that the rolling complex method of the continuous reduction of stainless steel/ordinary steel composite plate adopts.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing:
As shown in Figure 1, in the flame furnace of routine, be heated to 950 ℃～1250 ℃, and lead mouth 3 through the ordinary steel slab 1 after the de-scaling by steel billet entrance deflector roll 2 and steel billet inlet seal and import in the reducing atmosphere stove of being formed by leading portion insulation reduction furnace 5, stage casing reducing atmosphere heating furnace 14.The ordinary steel slab is at porch process wire brush 8 hackings, to improve the reduction rate of scale on surface, increase surface roughness, reducibility gas is imported in the reducing atmosphere stove by leading portion reducing gas inlet duct 9, winding-up is accelerated the reduction of billet surface iron scale at billet surface.Stainless steel sheet strip 10 is launched by stainless steel sheet strip uncoiler 11, lead mouth 12 through the stainless steel sheet strip inlet seal, imported in the stage casing reducing atmosphere heating furnace 14 by corrosion resistant plate tape entry guide roller 13, the rear portion of stage casing reducing atmosphere heating furnace 14 feeds reducibility gas through stage casing reducing gas inlet duct 18.When the two-sided compound tense of needs, dispose stainless steel sheet strip uncoiler 11 simultaneously at ordinary steel slab upper and lower surface, the stainless steel sheet strip inlet seal is led mouth 12, corrosion resistant plate tape entry guide roller 13 and corrosion resistant plate tape running roller-way 17, close one of them stainless steel sheet strip inlet seal when needs single face compound tense and lead mouth 12.In stage casing reducing atmosphere heating furnace 14, stainless steel sheet strip 10 progressively is heated to 950～1150 ℃, by guide roller 19 stainless steel sheet strip is pressed in ordinary steel slab surface then, and by milling train entrance deflector roll 20 and the 22 rolling pressings of milling train inlet seal guide and guard 21 importing roughing mills, rolling drafts controls 5%～40% by down-pressing system of rolling mill according to technological requirement.Enter holding furnace 24 between frame through preliminary compound slab, feed protective gas by gas atmosphere inlet pipeline 23 in the holding furnace 24 between frame, prevent the composite plate blanks surface oxidation, improve the surface quality of composite plate blanks.For improving the interface combined strength bination, it is rolling to utilize 25 pairs of composite plate blanks of finishing mill to implement second passage, or through 2～10 passage continuous rollings.After the rolling end; composite plate blanks or composite board are cooled off by protective gas water-cooled casing 26; cooling water cools off protective gas water-cooled casing 26 in the interlayer of inlet duct 27 feeding protective gas water-cooled casings 26; protective gas feeds in the protective gas water-cooled casing 26 through inlet duct 23 composite plate blanks is cooled off; cooling water is discharged casing from outlet conduit, and the composite plate blanks after the protective gas cooling or composite board are sheared scale again or be rolled into the finished product volume.
The rolling complex method embodiment 1 of the continuous reduction of stainless steel/ordinary steel composite plate
Thickness is 150mm, be heated to 1150 ℃ through common flame furnace, and the Q235 straight carbon steel slab 1 behind dephosphorize by high pressure water pinches by steel billet entrance deflector roll 2, leads mouth 3 through the steel billet inlet seal and enters in the leading portion insulation reduction furnace 5 even running on steel billet operation roller-way 6; Wire brush 8 rotates at a high speed and steel slab surface is carried out wiper, and the iron scale that comes off is fallen in the following sealed cistern 7, is decomposed the reducibility gas 75%H that makes by ammonia
2+ 25%N
2Enter in the leading portion insulation reduction furnace 5 by reducing gas inlet duct 9, winding-up is accelerated the reduction of billet surface iron scale to billet surface; The thickness of removing iron scale through overpickling is that the SUS304 stainless steel sheet strip 10 of 15mm slowly launches through stainless steel sheet strip uncoiler 11, lead mouth 12 through the stainless steel band inlet seal, imported in the stage casing reducing atmosphere heating furnace 14 by corrosion resistant plate tape entry guide roller 13,15 pairs of stainless steel sheet strips of stage casing reducing atmosphere heating furnace 14 external heated devices carry out Fast Heating, stainless steel sheet strip even running on corrosion resistant plate tape running roller-way 17, Q235 straight carbon steel slab continues even running on steel billet operation roller-way 6, is decomposed the reducibility gas 75%H that makes by ammonia
2+ 25%N
2Fed by gas access, stage casing pipeline 18, and contrary steel billet traffic direction blows to billet surface, discharge reduction furnace by reducing gas outlet conduit 4 at last, behind the reducibility gas Restore All that the iron scale on Q235 straight carbon steel slab surface is fed by the rear portion, when SUS304 stainless steel sheet strip 10 also is heated to 1150 ℃, by guide roller 19 the two is superimposed together, is pinched by milling train entrance deflector roll 20 again and enter milling train inlet seal guide and guard 21, import in the roughing mill 22 and be rolled pressing; Enter holding furnace 24 between frame through preliminary compound slab, feed protective gas industry N through gas atmosphere inlet pipeline 23 in the holding furnace 24 between frame
2, at protective gas N
2Protection under enter finishing mill 25 to carry out second passage rolling, or 2～10 milling trains be set carry out the more continuous rolling of multi-pass, until the finished product thickness that reaches final requirement; After the rolling end; make composite plate blanks or composite board band by protective gas water-cooled casing 26; temperature and speed by technological requirement are cooled off; at this moment; in the interlayer of cooling water through inlet duct 27 feeding water-cooled casings 26 the water conservancy casing is cooled off; protective gas feeds in the water-cooled casing 26 through inlet duct 23 composite plate blanks is cooled off; cooling water is discharged casing from outlet conduit; composite plate blanks or composite board are cooled to below 200 ℃ through protective gas, shear scale again or be rolled into the finished product volume to obtain SUS304/Q235 composite plate blanks or strip material.
The rolling complex method embodiment 2 of the continuous reduction of stainless steel/ordinary steel composite plate
Thickness is 100mm, be heated to 1180 ℃ through common flame furnace, and the 16Mn low-alloy structural plate slab 1 behind dephosphorize by high pressure water pinches by steel billet entrance deflector roll 2, leads mouth 3 through the steel billet inlet seal and enters in the leading portion insulation reduction furnace 5 even running on steel billet operation roller-way 6; Wire brush 8 rotates at a high speed and steel slab surface is carried out wiper, and the iron scale that comes off is fallen in the following sealed cistern 7; Decomposed the reducibility gas 100%H that makes by ammonia
2Enter in the leading portion insulation reduction furnace 5 by reducing gas inlet duct 9, winding-up is accelerated the reduction of billet surface iron scale to billet surface; Thickness through overpickling removal iron scale is SUS304L stainless steel sheet strip 10 warps two stainless steel sheet strip uncoilers 11 slowly expansion simultaneously up and down of 12mm, lead mouth 12 through the stainless steel inlet seal, imported in the stage casing reducing atmosphere heating furnace 14 by corrosion resistant plate tape entry guide roller 13,15 pairs of stainless steel sheet strips of reducing atmosphere heating furnace 14 external heated devices carry out Fast Heating, stainless steel sheet strip even running on corrosion resistant plate tape running roller-way 17,16Mn low-alloy structural plate slab continues even running on steel billet operation roller-way 6, is decomposed the reducibility gas 100%H that makes by ammonia
2Fed by gas access, stage casing pipeline 18; and contrary steel billet traffic direction blows to billet surface; discharge reduction furnace by reducing gas outlet conduit 4 at last; behind the reducibility gas Restore All that the iron scale of 16Mn low-alloy structural steel steel slab surface is fed by the rear portion; article two, when SUS304L stainless steel sheet strip 10 also is heated to 1150 ℃ simultaneously; by guide roller 19 the two is superimposed together; pinched by milling train entrance deflector roll 20 again and enter milling train inlet seal guide and guard 21; import in the roughing mill 22 and be rolled pressing; enter holding furnace 24 between frame through preliminary compound slab, feed protective gas industry N through gas atmosphere inlet pipeline 23 in the holding furnace 24 between frame
2, at protective gas N
2Protection under enter finishing mill 25 to carry out second passage rolling; or 2～10 milling trains are set carry out the more continuous rolling of multi-pass; until the finished product thickness that reaches final requirement; after the rolling end; make composite plate blanks or composite board band by protective gas water-cooled casing 26; at this moment; in the interlayer of cooling water through inlet duct 27 feeding water-cooled casings 26 the water conservancy casing is cooled off; protective gas feeds in the water-cooled casing 26 through inlet duct 23 composite plate blanks is cooled off; cooling water is discharged casing from outlet conduit; composite plate blanks or composite board are cooled to below 200 ℃ through protective gas, shear scale again or be rolled into the finished product volume to obtain SUS304L/16Mn/SUS304L composite plate blanks or strip material.
The device embodiment that the rolling complex method of the continuous reduction of stainless steel/ordinary steel composite plate adopts
As shown in Figure 1, this device comprises steel billet entrance deflector roll 2; the steel billet inlet seal is led mouth 3; reducing gas outlet conduit 4; leading portion insulation reduction furnace 5; steel billet operation roller-way 6; sealed cistern 7; wire brush 8; leading portion reducing gas inlet duct 9; stainless steel sheet strip uncoiler 11; the stainless steel sheet strip inlet seal is led mouth 12; corrosion resistant plate tape entry guide roller 13; stage casing reducing atmosphere heating furnace 14; heater 15; heat-insulation layer 16; corrosion resistant plate tape running roller-way 17; stage casing reducing gas inlet duct 18; guide roller 19; milling train entrance deflector roll 20; milling train inlet seal guide and guard 21; roughing mill 22; gas atmosphere inlet pipeline 23; holding furnace 24 between frame; finishing mill 25; protective gas water-cooled casing 26; cooling water inlet pipeline 27; the coolant outlet pipeline.
Installing initial is steel billet entrance deflector roll 2; what be right after the entrance deflector roll is that the steel billet inlet seal is led mouth 3; it then is leading portion insulation reduction furnace 5; the steel billet inlet seal is led mouth and is connected with the furnace sealing of leading portion insulation reduction furnace; next be stage casing reducing atmosphere heating furnace 14 again; stage casing reducing gas inlet duct 18 is set on the reducing atmosphere heating furnace of stage casing; leading portion insulation reduction furnace and stage casing reducing atmosphere heating furnace constitute the reducing atmosphere stove jointly; the body of heater of reducing atmosphere stove adopts the welding of Cr25Ni20 heat-resisting alloy steel to make; purpose is that the control reducibility gas flows in burner hearth and the scale on surface of the steel billet that enters burner hearth is reduced; the stainless steel sheet strip that enters burner hearth is heated; the outside refractory material heat-insulation layer 16 that adopts of the body of heater of reducing atmosphere stove is incubated; between the body of heater of stage casing reducing atmosphere heating furnace and heat-insulation layer, also be provided with heater 15; the heater heating element heater is resistance wire; or be the burner of fuel with coal gas; the length of stage casing reducing atmosphere heating furnace is 15～30 meters; 20～45 meters of the length of whole reducing atmosphere stove; the width of reducing atmosphere stove should be greater than the width of composite plate blanks or strip material; the reducing atmosphere furnace interior also is furnished with steel billet operation roller-way 6 and stainless steel band operation roller-way 13; and be furnished with wire brush 8 and sealed cistern 7 for the billet surface hacking in the burner hearth porch; lead mouth one end at inlet seal and be furnished with reducing gas outlet conduit 4; upper and lower surface is furnished with reducing gas inlet duct 9 respectively at the rear portion of reducing atmosphere stove; between leading portion insulation reduction furnace and stage casing reducing atmosphere heating furnace, be furnished with the stainless steel sheet strip inlet seal and lead mouth 12 and stainless steel sheet strip guide roller 17; be used for importing stainless steel sheet strip and sealing reducibility gas; its outside arranges two stainless steel sheet strip uncoilers 11 that are used for opening stainless steel sheet strip; in addition; end at stage casing reducing atmosphere heating furnace also arranges a pair of guide roller 19 for combination ordinary steel slab and stainless steel sheet strip; be one section body of heater that highly forces down reduced cross-sectional afterwards; to guarantee that gas passes through billet surface at a high speed; be milling train entrance deflector roll 20 and milling train inlet seal guide and guard 21 then; the two all is correctly to import milling train for the raw material after will making up; be roughing mill 22 after the guide and guard of milling train inlet seal; roughing mill is two rollers or four-high mill; the working roll of being furnished with inner water flowing cooling; 0～20 ℃ of cooling water inlet temperature; outlet temperature is lower than 60 ℃; be holding furnace 24 between frame after the roughing mill; gas atmosphere inlet pipeline 23 is arranged on the holding furnace; the body of heater of holding furnace adopts the welding of Cr25Ni20 heat-resisting alloy steel to make between frame; play the composite plate blanks insulation; effects such as composite plate blanks surface anti-oxidation and guide and guard, its inner protective gas N that feeds
2, the slick and sly contact arranges a finishing mill 25 after the holding furnace between frame between its two ends and the rolling mill roll, is furnished with the working roll that inner water flowing is cooled off, 0～20 ℃ of cooling water inlet temperature, and outlet temperature is lower than 60 ℃.Protective gas water-cooled casing 26 is set after the finishing mill, and protective gas water-cooled casing adopts the welding of common Q 235 steel to make, and constitutes by the inside and outside is two-layer, and nexine inside can feed protective gas N
2To the cooling that circulates of the slab after compound; can feed cooling water in the outer field interlayer cools off the protective gas that circulates; the length of protective gas water-cooled casing is 20～30m, and cooling water inlet pipeline 27, coolant outlet pipeline are arranged on the protective gas water-cooled casing.Protective gas water-cooled casing rear portion arranges cutter or crimping machine.
Claims (4)
1. the rolling complex method of continuous reduction of stainless steel/ordinary steel composite plate is characterized in that this method may further comprise the steps:
A. stainless steel sheet strip removing surface: adopt conventional acid wash to remove the iron scale of corrosion resistant plate belt surface, and use wire brush will treat to curl behind the compound corrosion resistant plate belt surface hacking standby;
B. the heating of ordinary steel slab and dephosphorization: the ordinary steel slab placed in the conventional flame furnace be heated to 950 ℃ ~ 1250 ℃, the back of coming out of the stove utilizes conventional water under high pressure to remove scale on surface, sends to immediately afterwards in the reducing atmosphere stove;
C. the reduction of ordinary steel slab scale on surface: the ordinary steel slab after the dephosphorization is sent in the reducing atmosphere stove, in this reducing atmosphere stove, feed reducibility gas, through after the reaction of certain hour, being reduced property of the iron scale gas reduction on ordinary steel slab surface;
D. the heating of stainless steel sheet strip: when the ordinary steel slab reduces in the reducing atmosphere stove, the stainless steel sheet strip of preprepared surface clean is imported in this reducing atmosphere stove, and by the heater of body of heater outer setting stainless steel sheet strip is carried out Fast Heating, be heated to 950～1250 ℃ of compound desired temperature until stainless steel sheet strip;
E. rolling pressing: the stainless steel sheet strip that will be heated to 950～1250 ℃, be reduced the clean direct milling train that imports in ordinary steel slab combination back with iron scale and be rolled pressing, rolling pressing 2 ~ 10 passages, and under protective atmosphere, carry out when rolling, until the composite plate blanks that obtains any surface finish or strip material;
F. cooling: after the rolling pressing, the stainless steel clad plate base that obtains, the laggard line space of direct shearing scale is cold, and the stainless steel clad sheet material that obtains adopts the cooling of protectiveness recyclegas or water-cooled, becomes the hot-rolled finished product volume after curling.
2. the device that adopts of the rolling complex method of the continuous reduction of the described stainless steel of claim 1/ordinary steel composite plate is characterized in that this device comprises with lower member:
Steel billet entrance deflector roll, the steel billet inlet seal is led mouth, the reducing gas outlet conduit, leading portion insulation reduction furnace, steel billet operation roller-way, sealed cistern, wire brush, leading portion reducing gas inlet duct, the stainless steel band uncoiler, the stainless steel sheet strip inlet seal is led mouth, corrosion resistant plate tape entry guide roller, stage casing reducing atmosphere heating furnace, heater, heat-insulation layer, corrosion resistant plate tape running roller-way, stage casing reducing gas inlet duct, guide roller, milling train entrance deflector roll, the guide and guard of milling train inlet seal, roughing mill, the gas atmosphere inlet pipeline, holding furnace between frame, finishing mill, protective gas water-cooled casing, the cooling water inlet pipeline, the coolant outlet pipeline;
Installing initial is steel billet entrance deflector roll; what be right after steel billet entrance deflector roll is that the steel billet inlet seal is led mouth; it then is leading portion insulation reduction furnace; the steel billet inlet seal is led mouth and is connected with the furnace sealing of leading portion insulation reduction furnace; next be stage casing reducing atmosphere heating furnace again; stage casing reducing gas inlet duct is set on the reducing atmosphere heating furnace of stage casing; leading portion insulation reduction furnace and stage casing reducing atmosphere heating furnace constitute the reducing atmosphere stove jointly; the body of heater of reducing atmosphere stove adopts the heat-resisting alloy steel welding to make; the outside refractory material heat-insulation layer that adopts of the body of heater of reducing atmosphere stove is incubated; between the body of heater of stage casing reducing atmosphere heating furnace and heat-insulation layer, also be provided with heater; the heater heating element heater is resistance wire; or be the burner of fuel with coal gas; the length of stage casing reducing atmosphere heating furnace is 15 ~ 30 meters; 20 ~ 45 meters of the length of whole reducing atmosphere stove; the width of reducing atmosphere stove should be greater than the width of composite plate blanks or strip material; the reducing atmosphere furnace interior also is furnished with steel billet operation roller-way and corrosion resistant plate tape running roller-way; and be furnished with wire brush and sealed cistern for the billet surface hacking in the burner hearth porch; lead mouth one end at the steel billet inlet seal and be furnished with the reducing gas outlet conduit; upper and lower surface is furnished with the reducing gas inlet duct respectively at the rear portion of reducing atmosphere stove; between leading portion insulation reduction furnace and stage casing reducing atmosphere heating furnace, be furnished with the stainless steel sheet strip inlet seal and lead mouth and stainless steel sheet strip guide roller; its outside arranges two stainless steel band uncoilers that are used for opening stainless steel sheet strip; in addition; end at stage casing reducing atmosphere heating furnace also arranges a pair of guide roller for combination ordinary steel slab and stainless steel sheet strip; be one section body of heater that highly forces down reduced cross-sectional afterwards; be milling train entrance deflector roll and the guide and guard of milling train inlet seal then; be roughing mill after the guide and guard of milling train inlet seal; the inner water flowing cooling of roughing mill roll; be holding furnace between frame after the roughing mill; the gas atmosphere inlet pipeline is arranged on the holding furnace between frame; its inner protective gas that feeds; the slick and sly contact between its two ends and the rolling mill roll; finishing mill is set after the holding furnace between frame; the inner water flowing cooling of finishing mill roll; after the finishing mill protective gas water-cooled casing is set, on the protective gas water-cooled casing cooling water inlet pipeline is arranged; the coolant outlet pipeline.
3. the device that adopts of the rolling complex method of the continuous reduction of stainless steel according to claim 2/ordinary steel composite plate; it is characterized in that said protective gas water-cooled casing adopts the ordinary steel welding to make; constitute by the inside and outside is two-layer; the inner protective gas that feeds of nexine; feed cooling water in the outer field interlayer again, 4～30 meters of the length of protective gas water-cooled casing.
4. the device of the rolling complex method employing of the continuous reduction of stainless steel according to claim 2/ordinary steel composite plate is characterized in that the rear portion of said protective gas water-cooled casing also is furnished with cutter or crimping machine.
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| CN105149351A (en) * | 2015-09-16 | 2015-12-16 | 武汉钢铁(集团)公司 | Preparation method and device for metal composite plate |
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| CN104550234A (en) * | 2014-12-26 | 2015-04-29 | 南阳汉冶特钢有限公司 | Rolling method of pipeline steel and stainless steel composite plate |
| CN104826865B (en) * | 2015-05-08 | 2017-06-27 | 武汉钢铁(集团)公司 | A kind of method and device for preparing composite metal plate |
| CN105032928B (en) * | 2015-06-15 | 2017-07-18 | 武汉钢铁(集团)公司 | A kind of method and device of rolled metal complex plate strip |
| KR101653742B1 (en) * | 2015-06-19 | 2016-09-06 | 주식회사 한국클래드텍 | Method and device for continuously manufacturing a cald sheet |
| CN105195512B (en) * | 2015-09-14 | 2017-04-12 | 山东钢铁股份有限公司 | Equipment for preparing metal composite plate and preparation method for metal composite plate |
| CN105107842B (en) * | 2015-09-15 | 2017-05-31 | 辽宁科技大学 | The method and its device of a kind of reduction rolling laminating production slab and special heavy plate |
| DE102016205221A1 (en) | 2016-03-30 | 2017-10-05 | Sms Group Gmbh | Apparatus and method for plating a hot slab |
| CN109982805A (en) | 2016-11-18 | 2019-07-05 | Sms集团有限公司 | For manufacturing the method and equipment of continuous Strip composite material |
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