CN105234177A - Hot rolling method for restraining warping of asymmetrically-assembled titanium steel composite board - Google Patents
Hot rolling method for restraining warping of asymmetrically-assembled titanium steel composite board Download PDFInfo
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- CN105234177A CN105234177A CN201510640317.6A CN201510640317A CN105234177A CN 105234177 A CN105234177 A CN 105234177A CN 201510640317 A CN201510640317 A CN 201510640317A CN 105234177 A CN105234177 A CN 105234177A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/46—Roll speed or drive motor control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
- B21B2001/386—Plates
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Abstract
The invention provides a hot rolling method for restraining warping of an asymmetrically-assembled titanium steel composite board. The hot rolling method comprises the steps that a steel plate, a titanium plate and a cover plate are assembled asymmetrically; side plates are arranged around the titanium plate; the surface of the titanium plate and the surface, to be combined, of the steel plate are coated with high-temperature anti-oxidation coatings; a separant is arranged between the titanium plate and the cover plate; the side plates, the cover plate and the steel plate are electrically welded together; the rolling speed of an upper roller and the rolling speed of a lower roller are adjusted in the hot rolling process, longitudinal warping of the asymmetrically-assembled titanium steel composite board is controlled through isometric asymmetrical rolling, and the different speed ratio is determined according to the specific rolling conditions such as the rolling reduction; and the cover plate is separated from the composite board along the separant through heat treatment, straightening, head and tail cutting and edge cutting after rolling is completed, and thus the titanium steel composite board which is high in dimensional precision, excellent in plate form and good in surface quality is obtained. According to the hot rolling method, a simplified assembly method is used for preventing oxidation of all the surfaces of the titanium plate and oxidation of the surface of steel on an interface; meanwhile, by the adoption of the reasonable isometric asymmetrical rolling method, the problem of longitudinal warping of asymmetrical rolling is solved.
Description
Technical field
The invention belongs to rolled metal composite plate production technical field, be specifically related to the hot-rolling method that a kind of asymmetric assembly titanium steel composite board suppresses warpage.
Background technology
Severe along with metal material Service Environment, single metal has been difficult to the Service Environment meeting this complexity, and structure may be caused to lose efficacy, and endangers equipment and production safety time serious.Therefore, bimetallic material is applied and gives birth to.Dissimilar metal titanium and steel are made together with its seam by the method for rolling, obtain the titanium steel composite board of certain bond strength, the existing good intensity of this composite plate has again good decay resistance, welding performance and heat conductivility are also good simultaneously, play act on widely in chemical field, oil field, power domain, marine field, shipbuilding field, pharmaceutical field, nuclear power field.
The production method of titanium steel composite board mainly contains three kinds, explosion method, blast-rolling, rolling.The composite plate that first method is produced is owing to being utilization explosion technique, product size is subject to a lot of restriction, and blast before preparatory process very complicated, first method and the second method shortcoming that has some common in addition, be exactly that it can cause environmental pollution, and the energy consumed is very large, the lumber recovery of product is also low, if use rolling to produce titanium/steel composite board, the scope of its producible product size is large, bond quality and surface quality good, lumber recovery is high, dimensional accuracy is high, production efficiency is high, the main method of producing titanium/steel composite board will be become gradually.
Method hot rolling plate adopts the method for rolling, uses powerful draught pressure to make metal surface to be combined expose fresh metal, and along with the increase of drafts, make two kinds of metals form the method for more and more firmly metallurgical binding.
In the process of hot rolling titanium steel composite board, titanium at high temperature easily and oxygen there is strong chemical reaction and influence of rolled process, the surface of steel plate of interface also can generate iron scale with oxygen reaction, affects composite plate interface quality; Therefore, need to carry out anti-oxidation process to all surface of titanium plate and interface steel plate.In order to address this problem, usually adopt three kinds of methods: one is in composite plate hot rolling in vacuum rolling mill, two is the method manufacture vacuum environments utilizing baffle plate and vacuumize, and three is be coated with last layer high-temperature oxidation resistant coating on surface.First method is very high to equipment requirement, the apparatus expensive of Vacuum Heat milling train and domesticly can not to produce, and needs import; In second, the vacuum of method is very complicated, very high to the requirement of each operation and operator; The third Measures compare is simple, but its oxidation-protective effect does not have first two method good.
In the process of the hot rolling titanium steel composite board of asymmetric assembly, due to titanium and steel, to there is very large resistance of deformation poor, and therefore, its rolling deformation can occur seriously inharmonious, produce lonitudinal warping (discount and the upwarp) problem of template, this is a great problem that hot rolling titanium steel composite board faces.In order to solve lonitudinal warping (discount and upwarp) problem, there are two kinds of solutions: one is by symmetrical for titanium steel composite board assembly, adopts the symmetrical assemble pattern of ABBA to control the problem of compatibility of deformation in course of hot rolling; Two is the modes adopting asymmetric assembly, titanium plate and the temperature of steel plate during by controlling open rolling, and the methods such as rational controlled cooling model control lonitudinal warping (discount and upwarp).The shortcoming of above-mentioned symmetrical assemble pattern hot rolling be rolling power is required higher; The shortcoming of asymmetric assembly hot rolling needs by rational technology controlling and process lonitudinal warping (discount and upwarp) problem.When adopting the method for symmetrical assembly ABBA to solve lonitudinal warping (discount and upwarp) problem, because sheet material is four layers, higher requirement is proposed to rolled piece ability; Adopting the method for temperature and cooling water control lonitudinal warping (discount and upwarp) to sheet material heating cycle, heating-up temperature precision and heating furnace are proposed higher requirement, the selection of cooling velocity simultaneously and the processing step being determined to become comparatively complexity of cool time, once speed and selection of time mistake, be then difficult to well to solve the problem of lonitudinal warping (discount and upwarp).
Summary of the invention
The present invention is based on three layers of asymmetric assembly of steel plate, titanium plate, cover plate, scribble inoxidzable coating on the surface to be combined of titanium plate all surface and steel plate; In composite plate, cover the thin cover plate of one deck simultaneously and place side plate in titanium plate surrounding, the too much contact of titanium plate and air during to control hot rolling; Combine by using physics anti-oxidation method and chemical anti-oxidation method and reduce the high-temperature oxydation of titanium surface and interface place metal; Simultaneously in the hot rolling according to drafts, ingoing ga(u)ge, rolls front temperature, and the method (asymmetrical rolling) of rolled piece and roll friction condition Reasonable adjustment top and bottom rolls rotating speed controls template lonitudinal warping (discount with upwarp) problem.
The concrete solution to the problems described above of the present invention is as follows: provide a kind of asymmetric assembly titanium steel composite board to suppress the hot-rolling method of warpage; described hot-rolling method carries out hot rolling to three layers of asymmetric assembly through high-temp antioxidizing process; and in the operation of rolling, controlled the lonitudinal warping of three layers of asymmetric assembly by the mode of isometrical asymmetrical rolling, acquisition titanium steel composite board after rolling completes;
Further; wherein said three layers of asymmetric assembly the superiors substrate through high-temp antioxidizing process are steel plate, intermediate layer compound plate is titanium plate, orlop is mild steel cover plate; the all surface of described titanium plate all scribbles high-temperature oxidation resistant coating; the surface to be composite of described steel plate also scribbles high-temperature oxidation resistant coating; the surrounding of described titanium plate is also provided with mild steel side plate, described mild steel side plate respectively with mild steel cover plate and Plate Welding;
Further, wherein said isometrical asymmetrical rolling is that the roll rotational speed of adjustment steel plate side is greater than the rotating speed of titanium plate side;
Further, described hot-rolling method comprises the following steps:
S1 process blank also carries out assembly;
S2 heats assembly;
S3 multi-pass reversible rolling;
The assembly of S4 heat treatment rolling;
S5 cutting and separating obtains titanium steel composite board;
Further, described S1 concrete steps are:
(1) blank surface process: surface treatment is carried out on surface to be composite for blank, then to be composite of the blank of removing defect is cleaned up with organic solvent, last layer high-temperature oxidation resistant coating is coated with at all surface of titanium plate and the surface to be combined of steel plate, the surface contacted with titanium plate by mild steel cover plate is coated with last layer interleaving agent, length and the width of described titanium plate are all less than steel plate, and described steel plate is identical with width with the length of cover plate;
(2) assembly: adopt three layers of assemble pattern; the superiors' substrate is steel plate; intermediate layer compound plate is titanium plate; orlop is mild steel cover plate; mild steel side plate is set in the surrounding of titanium plate simultaneously; titanium plate in (1) is placed on mild steel cover plate; steel plate is placed on titanium plate; titanium plate surrounding places mild steel side plate; to blank holding be organized at hydraulic pressure platform, and mild steel side plate and mild steel cover plate and steel plate be carried out soldering and sealing, obtains three layers of asymmetric assembly; described steel plate is Q235, and described titanium plate is TA2;
Further, described S2 concrete steps are: heating warm area S1 assembly being placed in heating furnace carries out heating 2h, the temperature controlling its steel plate and titanium plate is 850 DEG C, then equal heat treatment is carried out at the soaking warm area of heating furnace, the temperature controlling surface of steel plate and titanium plate surface is 880 DEG C, and soaking time is 30min ~ 60min;
Further; described S3 concrete steps are: the assembly after the heating in S2 is carried out multi-pass reversible rolling on hot-rolling mill; rolling mode used is isometrical asymmetrical rolling; the roll rotational speed of adjustment steel plate side is greater than the rotating speed of titanium plate side; ratio is 1 ~ 1.2, and the method adjusting this rotating ratio is by controlling drafts, ingoing ga(u)ge; roll front temperature, rolled piece and roll friction;
Further, described S4 concrete steps are: heat-treated under the condition of 550 ~ 650 DEG C by the assembly in S3, and the time is 1h ~ 3h;
Further, described S5 concrete steps are: by S4 after heat treatment assembly aligning, crop end; trimming portion, and by cover plate and titanium plate along interleaving agent natural separation, obtain titanium steel composite board; in described titanium steel composite board, titanium plate thickness is 1 ~ 10mm, and titanium steel composite board gross thickness is 10 ~ 60mm;
Further, in described S1, organic solvent is acetone or ethanol, and interleaving agent is organic coating, and antioxidizing paint used is FY-1, MP120, MP130;
Further, in described S3, hot rolling pass is 5 ~ 15 passages, and 1-4 passage is with the rolling of 0.5 ~ 1m/s mill speed;
Further, the initial rolling pass drafts of the hot rolling in described S3 is greater than 20% of initial assembly size, and total deformation rate is greater than 70%.
Beneficial effect of the present invention is as follows:
(1) physical method of isolating with oxygen adopting asymmetric assembly to add cover plate and side plate and high-temperature oxidation resistant coating combine with the chemical method that oxygen is isolated and strengthen the effect of high-temp antioxidizing, do not need use four layers of assemble pattern, do not need to carry out vacuumizing process, enormously simplify technological process, decrease the requirement to mill capacity.
(2) when Asymmetric Rolling, the reason that titanium steel composite board produces lonitudinal warping (discount and upwarp) is that the resistance of deformation of bi-material under identical rolling condition differs larger, the distortion of steel plate is little than titanium plate, therefore there will be the phenomenon of composite plate to steel plate side lonitudinal warping (discount and upwarp) in the operation of rolling, adopting the different mill speed of top and bottom rolls (there is friction speed ratio), lonitudinal warping (discount and upwarp) phenomenon then can be made to reduce even to eliminate, and control device is easy.
(3) after rolling completes, through Overheating Treatment, aligning, crop end and edge, cover plate and composite plate to be separated along interleaving agent and obtain the titanium steel composite board that dimensional accuracy is high, template is excellent, surface quality is good, Surface bond rate is more than 99.6%, and shear strength is more than 200MPa.
(4) assemble pattern that have employed simplification prevent titanium plate all surface with the oxidation on steel surface, interface, apply rational isometrical asymmetrical rolling system simultaneously, solve the lonitudinal warping problem of Asymmetric Rolling.
Accompanying drawing explanation
Fig. 1 is the generalized section of hot rolling production titanium steel composite board prepared by the present invention.
Description of reference numerals:
1-steel plate; 2-high-temperature oxidation resistant coating; 3-side plate; 4-titanium plate; 5-interleaving agent; 6-steel cover plate.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is explained in further detail.Should be appreciated that specific embodiment described herein only for explaining the present invention, being not intended to limit the present invention.On the contrary, the present invention is contained any by the substituting of making on marrow of the present invention and scope of defining of claim, amendment, equivalent method and scheme.Further, in order to make the public have a better understanding to the present invention, in hereafter details of the present invention being described, detailedly describe some specific detail sections.Do not have the description of these detail sections can understand the present invention completely for a person skilled in the art yet.
Below in conjunction with the drawings and specific embodiments, the invention will be further described, but not as a limitation of the invention.Most preferred embodiment is enumerated below for of the present invention:
Be illustrated in figure 1 the generalized section of hot rolling production titanium steel composite board prepared by the present invention, a kind of asymmetric assembly titanium steel composite board suppresses the hot-rolling method of warpage, described hot-rolling method uses steel plate, titanium plate, three layers of asymmetric assembly of cover plate, in titanium plate surrounding, side plate is set, the surface to be composite of all surface of titanium plate and steel plate is coated with last layer high-temperature oxidation resistant coating, and interleaving agent is adopted between titanium plate and cover plate, by the cover plate of side plate and bottom, the steel plate on top carries out electric arc welding, the mill speed of top and bottom rolls is adjusted in course of hot rolling, the lonitudinal warping problem of asymmetric hot rolling titanium steel composite board is controlled by the mode of isometrical asymmetrical rolling, according to concrete rolling situation determination friction speed ratios such as drafts, after rolling completes, through Overheating Treatment, aligning, crop end and edge, along interleaving agent cover plate and composite plate separated that to obtain dimensional accuracy high, template is excellent, the titanium steel composite board that surface quality is good.
Described hot-rolling method comprises the following steps:
S1 process blank also carries out assembly;
S2 heats titanium steel composite board;
S3 multi-pass reversible rolling;
The composite plate of S4 heat treatment rolling;
S5 cutting and separating titanium steel composite board.
Described S1 concrete steps are: (1) blank surface process: surface treatment is carried out on the surface to be composite of substrate and compound plate, then to be composite of removing defect is cleaned up with organic solvent, last layer high-temperature oxidation resistant coating is coated with at all surface of titanium plate and the surface to be combined of steel plate, the surface contacted with titanium plate by cover plate is coated with last layer interleaving agent, length and the width of described titanium plate are all less than steel plate, and described steel plate is identical with width with the length of cover plate, (2) assembly: adopt three layers of assemble pattern, the superiors are substrate Q235, intermediate layer is compound plate is TA2, orlop is mild steel cover plate, mild steel side plate is set in the surrounding of titanium plate simultaneously, the mill speed of described steel side roll is greater than titanium side roll, its friction speed ratio is 1 ~ 1.2, again the titanium plate in (1) is placed on cover plate, steel plate is placed on titanium plate, titanium plate surrounding places side plate, blank holding will be organized at hydraulic pressure platform, side plate and cover plate and steel plate are carried out soldering and sealing by arc welding by hand, in described S1, organic solvent is acetone or ethanol, interleaving agent is organic coating, antioxidizing paint used is FY-1, MP120, MP130.
Described S2 concrete steps are: the heating warm area that the titanium steel composite board after being completed by assembly in S1 is placed in heating furnace carries out heating 2h, control the temperature 850 DEG C of its steel plate and titanium plate, then the soaking warm area pushing heating furnace carries out equal heat treatment, the temperature controlling surface of steel plate and titanium plate surface is 880 DEG C, and soaking time is 30min ~ 60min.
Described S3 concrete steps are: the titanium steel composite board after the heating in S2 is carried out multi-pass reversible rolling on hot-rolling mill, rolling mode used is isometrical asymmetrical rolling, the roll rotational speed of adjustment steel plate side is greater than the rotating speed of titanium plate side, ratio is 1 ~ 1.2, in described S3, hot rolling pass is 5 ~ 15 passages, 1-4 passage is with the rolling of 0.5 ~ 1m/s mill speed, the initial rolling pass drafts of the hot rolling in described S3 is greater than 20% of initial composite board size, total deformation rate is greater than 70%, asynchronous ratio is steel plate side roll rotational speed and the ratio of titanium plate side roll rotational speed, friction speed is than the ratio for the linear velocity of steel side roll and the linear velocity of titanium side rolling, size and the ratio of titanium plate with steel plate thickness of described friction speed ratio, drafts, the coefficient of friction of rolled piece and roll, roll front temperature related, the ratio of what wherein relevance was maximum is titanium plate and the thickness of steel plate and drafts, described friction speed increases than along with titanium plate and the increase of the ratio of steel plate thickness, increase along with the increase of drafts, coefficient of friction along with titanium plate and roll increases and the minimizing of steel plate and roll coefficient of friction and increase, increase along with the minimizing of roller diameter.
Described S4 concrete steps are: heat-treated under the condition of 550 ~ 650 DEG C by the titanium steel composite board in S3, and the time is 1h ~ 3h.
Described S5 concrete steps are: by titanium steel composite board aligning after heat treatment in S4, crop end, trimming portion, and by thin cover plate and titanium steel composite board along interleaving agent natural separation, obtaining titanium plate thickness is 1 ~ 10mm, and titanium steel composite board gross thickness is 10 ~ 60mm.
Embodiment 1:
Step one, the Q235 steel plate selecting thickness to be 63mm and thickness are the TA2 titanium plate of 6mm, with flap disc, surface treatment are carried out on the surface to be composite of substrate and compound plate, remove the defects such as the oxide layer on surface to be composite, slag inclusion, cavity; Then to be composite of removing defect is cleaned up with acetone; Be coated with last layer MP130 high-temperature oxidation resistant coating at all surface of titanium plate and the surface to be combined of steel plate, the upper surface of the surface contact cover plate with titanium plate and titanium plate is coated with last layer interleaving agent;
The mode of step 2, employing Fig. 1 carries out the assembly of composite plate, titanium plate in step 2 is placed on cover plate, steel plate is placed on titanium plate, hydraulic pressure platform compresses, to organize blank holding at hydraulic pressure platform, side plate and cover plate and steel plate are carried out soldering and sealing by arc welding by hand;
Step 3, assembly in step 2 is completed after the titanium steel composite board heating warm area that is placed in pusher-type furnace carry out heating 2h; the temperature controlling its steel plate and titanium plate is 850 DEG C; then the soaking warm area pushing pusher-type furnace carries out equal heat treatment; the temperature controlling surface of steel plate and titanium plate surface is 880 DEG C, and soaking time is 30min;
Step 4, the titanium steel composite board after the heating in step 3 is carried out seven passage reversible rollings on hot-rolling mill, each reduction in pass is respectively: 14mm, 12mm, 10mm, 8mm, 6mm, 3mm, 2mm; The mill speed of front four-pass is 1m/s, and the rolling pass of rear three passages is 2m/s; Adopt with footpath asymmetrical rolling; the roll rotational speed of adjustment steel plate side is slightly larger than the rotating speed of titanium plate side, and asynchronous ratio is steel plate side roll rotational speed and the ratio of titanium plate side roll rotational speed, and asynchronous ratio is 1 ~ 1.2; the friction speed ratio of the first passage is 1.0322, and friction speed increases gradually than along with rolling pass;
Step 5, heat-treated under the condition of 580 DEG C by the titanium steel composite board in step 4, the time is 1h;
Step 6, by titanium steel composite board misting cooling after heat treatment in step 5, aligning, crop end; And by thin cover plate and titanium steel composite board along interleaving agent natural separation, obtaining titanium plate thickness is 1.2mm, gross thickness is 14mm, and shear strength is the titanium steel composite board product (GB8547-2006:0 class titanium steel composite board >=196MPa, 1,2 class titanium steel composite board >=138MPa) of 200MPa.
Above-described embodiment, the just one of the present invention's more preferably detailed description of the invention, the usual change that those skilled in the art carries out within the scope of technical solution of the present invention and replacing all should be included in protection scope of the present invention.
Claims (10)
1. the hot-rolling method of an asymmetric assembly titanium steel composite board suppression warpage, it is characterized in that, described hot-rolling method carries out hot rolling to three layers of asymmetric assembly through high-temp antioxidizing process, and in the operation of rolling, controlled the lonitudinal warping of three layers of asymmetric assembly by the mode of isometrical asymmetrical rolling, acquisition titanium steel composite board after rolling completes.
2. hot-rolling method according to claim 1, it is characterized in that, described three layers of asymmetric assembly the superiors substrate through high-temp antioxidizing process are steel plate, intermediate layer compound plate is titanium plate, orlop is mild steel cover plate, the all surface of described titanium plate all scribbles high-temperature oxidation resistant coating, the surface to be composite of described steel plate also scribbles high-temperature oxidation resistant coating, the surrounding of described titanium plate is also provided with mild steel side plate, described mild steel side plate respectively with mild steel cover plate and Plate Welding;
Wherein said isometrical asymmetrical rolling is that the roll rotational speed of adjustment steel plate side is greater than the rotating speed of titanium plate side.
3. hot-rolling method according to claim 1, is characterized in that, described hot-rolling method comprises the following steps:
S1: process blank also carries out assembly;
S2: heating assembly;
S3: multi-pass reversible rolling;
S4: the assembly of heat treatment rolling;
S5: cutting and separating obtains titanium steel composite board.
4. hot-rolling method according to claim 3, is characterized in that, described S1 concrete steps are:
(1) blank surface process: surface treatment is carried out on surface to be composite for blank, then to be composite of the blank of removing defect is cleaned up with organic solvent, last layer high-temperature oxidation resistant coating is coated with at all surface of titanium plate and the surface to be combined of steel plate, the surface contacted with titanium plate by mild steel cover plate is coated with last layer interleaving agent, length and the width of described titanium plate are all less than steel plate, and described steel plate is identical with width with the length of cover plate;
(2) assembly: adopt three layers of assemble pattern, the superiors' substrate is steel plate, intermediate layer compound plate is titanium plate, orlop is mild steel cover plate, mild steel side plate is set in the surrounding of titanium plate simultaneously, titanium plate in (1) is placed on mild steel cover plate, steel plate is placed on titanium plate, titanium plate surrounding places mild steel side plate, to blank holding be organized at hydraulic pressure platform, and mild steel side plate and mild steel cover plate and steel plate be carried out soldering and sealing, obtains three layers of asymmetric assembly, described steel plate is Q235, and described titanium plate is TA2.
5. hot-rolling method according to claim 4, it is characterized in that, described S2 concrete steps are: heating warm area assembly in S1 being placed in heating furnace carries out heating 2h, the temperature controlling its steel plate and titanium plate is 850 DEG C, then equal heat treatment is carried out at the soaking warm area of heating furnace, the temperature controlling surface of steel plate and titanium plate surface is 880 DEG C, and soaking time is 30min ~ 60min.
6. hot-rolling method according to claim 5, it is characterized in that, described S3 concrete steps are: the assembly after the heating in S2 is carried out multi-pass reversible rolling on hot-rolling mill, rolling mode used is isometrical asymmetrical rolling, and the roll rotational speed of adjustment steel plate side is greater than the rotating speed of titanium plate side, and ratio is 1 ~ 1.2, the method adjusting this rotating ratio is by controlling drafts, ingoing ga(u)ge, rolls front temperature, rolled piece and roll friction.
7. hot-rolling method according to claim 6, is characterized in that, described S4 concrete steps are: heat-treated under the condition of 550 ~ 650 DEG C by the assembly in S3, and the time is 1h ~ 3h.
8. hot-rolling method according to claim 7, it is characterized in that, described S5 concrete steps are: by S4 after heat treatment assembly aligning, crop end, trimming portion, and by cover plate and titanium plate along interleaving agent natural separation, obtain titanium steel composite board, in described titanium steel composite board, titanium plate thickness is 1 ~ 10mm, and titanium steel composite board gross thickness is 10 ~ 60mm.
9. hot-rolling method according to claim 4, is characterized in that, in described S1, organic solvent is acetone or ethanol, and interleaving agent is organic coating, and antioxidizing paint used is FY-1, MP120, MP130.
10. hot-rolling method according to claim 5, it is characterized in that, in described S3, hot rolling pass is 5 ~ 15 passages, and 1-4 passage is with the rolling of 0.5 ~ 1m/s mill speed, the initial rolling pass drafts of the hot rolling in described S3 is greater than 20% of initial assembly size, and total deformation rate is greater than 70%.
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