CN105414183A - Technology method for manufacturing wide sheet through magnesium alloy cast rolled plate - Google Patents

Technology method for manufacturing wide sheet through magnesium alloy cast rolled plate Download PDF

Info

Publication number
CN105414183A
CN105414183A CN201510854891.1A CN201510854891A CN105414183A CN 105414183 A CN105414183 A CN 105414183A CN 201510854891 A CN201510854891 A CN 201510854891A CN 105414183 A CN105414183 A CN 105414183A
Authority
CN
China
Prior art keywords
rolling
district
blank
casting
width
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201510854891.1A
Other languages
Chinese (zh)
Other versions
CN105414183B (en
Inventor
刘光明
姬亚锋
马立峰
黄志权
周存龙
黄庆学
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Taiyuan University of Science and Technology
Original Assignee
Taiyuan University of Science and Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Taiyuan University of Science and Technology filed Critical Taiyuan University of Science and Technology
Priority to CN201510854891.1A priority Critical patent/CN105414183B/en
Publication of CN105414183A publication Critical patent/CN105414183A/en
Application granted granted Critical
Publication of CN105414183B publication Critical patent/CN105414183B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • B21B1/46—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 metal immediately subsequent to continuous casting
    • B21B1/463—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 metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B15/0007—Cutting or shearing the product
    • 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
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • 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
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B21B37/22—Lateral spread control; Width control, e.g. by edge rolling
    • 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
    • B21B37/56—Elongation control
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B15/0007—Cutting or shearing the product
    • B21B2015/0014—Cutting or shearing the product transversely to the rolling direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B15/0007—Cutting or shearing the product
    • B21B2015/0021—Cutting or shearing the product in the rolling direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/02—Transverse dimensions
    • B21B2261/04—Thickness, gauge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/02—Transverse dimensions
    • B21B2261/06—Width
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/12—Length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/20—Temperature

Abstract

The invention discloses a technology method for manufacturing a wide sheet through a magnesium alloy cast rolled plate and belongs to the technical field of manufacturing of wide sheets through magnesium alloy cast rolled plates. The technology method is characterized in that the rolling technology of the aluminum alloy wide sheet comprises the following steps that firstly, the dimension of a wide sheet rolled blank is determined, the cross section of the wide sheet rolled blank comprises a middle thin area, thick areas are arranged on the two sides of the middle thin area, the thick areas are connected with the middle thin area through transition areas, and the thickness of the parts, in the transition areas, of the blank is gradually reduced from the thick areas to the middle thin area; secondly, the wide sheet rolled blank is rolled; and thirdly, the wide sheet is rolled. According to the technology method, shaping rolling is added before rolling of the magnesium alloy wide sheet, the shape of the rolled blank is changed, and therefore the good blank is provided for rolling of the magnesium alloy wide sheet. By means of the subsequent rolling process of the blank, edge cracking of magnesium alloy rolling is relieved, the width of the magnesium alloy sheet is increased, and the magnesium alloy wide sheet can meet use requirements better.

Description

The process of wide sheet prepared by roll-casting of magnesium alloy plate
Technical field
The invention belongs to roll-casting of magnesium alloy plate or casting volume Direct Rolling wide sheet technical field, be specially the process that wide sheet prepared by roll-casting of magnesium alloy plate.
Background technology
Magnesium alloy is structural metallic materials the lightest in current engineer applied, has become the important materials of the industrial circles such as national defense and military, Aero-Space, automobile, electronic communication.Along with the startup of the Larger Engineering Projects such as China's high-speed rail transportation, electric automobile, large gauge magnesium-alloy material is had higher requirement.
Magnesium alloy wide-width thin plate is from thickness angle, and sheet metal can be divided into slab and thin plate routinely, and what thickness was not less than 6.0mm is called slab (plate), and thickness is greater than 0.20mm but is less than the title thin plate (sheet) of 6.0mm.Certainly, what also thickness can be less than 10mm to magnesium sheet material is called thin plate.Be the rolled products that cross section is rectangular, thickness is greater than 0.20mm all in the lump according to GBPT5154-2003 sheet material (plateandsheet), usual edge is through shearing or sawing, and with the delivery of flat profile, thickness is no more than 1/10 of width.Magnesium alloy sheet is formed by magnesium alloy ingot rolling, and usual magnesium alloy ingot is of a size of: thick 127mm ~ 305mm, wide 406mm ~ 1041mm, long 914mm ~ 2032mm, and magnesium alloy ingot width is preferably 4:1 with the ratio of thickness.The technique being at present rolled into thin plate by magnesium alloy ingot for magnesium alloy is very ripe.
On the other hand, magnesium alloy wide-width thin plate is from width angle, and Pohang Iron and Steel Corporation of Korea S (POSCO) has one with the enterprise of two-roll casting magnesium strip at light sun, is referred to as PoStrip.Itself and Britain ElectronMagnesium develop jointly magnesium products, are in advanced international standard in this field.2008, a plant-scale roll-casting of magnesium alloy factory is constructed and put into operation in investigation of materials institute of Turkey (TUBITAKMRC), they adopt Twin roll continuous casting technology to produce the AZ31 magnesium alloy plate of 6mm × (800 ~ 1500) mm, and slab product can be become dull and stereotyped by continuous coiling or cutting on line.This is that hitherto reported produces the widest AZ31 cast-rolled block.In addition, the state such as Japanese, Canadian is also all producing magnesium alloy plate by double-roller rolling method (TRC method).
The production of magnesium alloy plate mainly contains following three kinds of methods: double-roller rolling method (TRC method), extrusion blooming rolling (ER method) and slab hot-rolling cogging method (HR method).Casting and roll process is low-cost magnesium alloy plank stuff production technology, but product quality is not as rolling, and very difficult (width is generally at below 650mm) is produced in the casting that will realize wide plate; Extrusion blooming method is mainly for the production of thin plate, but the width of sheet material is restricted (generally at below 600mm); Slab hot-rolling cogging method is traditional magnesium alloy plate production method, can produce magnesium alloy wide-width thin plate, but the method yield rate is low, and production cost is high.Traffic and transport field uses magnesium alloy sheet specification to be generally thickness 1.5 ~ 3.0mm; width G reatT.GreaT.GT1600mm; length >4000mm; be limited to the reasons such as casting and extrusion plate short of width and slab hot-rolling split rolling method lumber recovery are low, high cost, current magnesium alloy plate is not also in this field scale application.
The development trend of the magnesium alloy plate and belt market demand and scale application is wide cut and cost degradation.Wide cut is the primary condition that magnesium alloy plate meets the traffic transport industry lightweight needs such as automobile, train, passenger vehicle, aircraft, and this depends on the progress of wide plate production technology and equipment; Cost degradation be magnesium alloy plate can with the essential condition of other material competition.Due to magnesium alloy sheet, to add man-hour temperature drop fast, and edge crack is serious, so the problem of edge crack when how to solve magnesium alloy wide-width thin plate rolling, becomes the key improving magnesium alloy wide-width thin plate rolling product percent of pass and production efficiency.
Summary of the invention
The object of the invention is to the process that wide sheet prepared by exploitation roll-casting of magnesium alloy plate, at the beginning of directly preparing magnesium alloy wide-width thin plate by Casting Rolled Sheet or casting volume, namely by shaping rolling mill practice, be rolled into " dog bone " shape blank that plate blank material intermediate thin, both sides are thick, solve the problem of edge crack during magnesium alloy wide-width thin plate rolling.
For achieving the above object, technical scheme of the present invention is:
The process of wide sheet prepared by roll-casting of magnesium alloy plate, it is characterized in that: the rolling mill practice of magnesium alloy wide-width thin plate comprises the steps: the determination of (), wide sheet rolling blank geomery, wide sheet rolling blank cross section comprises intermediate thin district, both sides, intermediate thin district arrange thick district, adopt transition region to be connected between thick district with intermediate thin district, the sotck thinkness of transition region reduces from thick district continuously to intermediate thin district; (2), the rolling of wide sheet rolling blank; (3), wide sheet rolling.
The transition connected mode of transition region is that arc transition connects or straight transitions connects.
When the transition connected mode of transition region is arc transition connection, rolling blank method for determining dimension comprises the steps:
1), supplied materials thickness is H 0, then intermediate thin district thickness is:
h b＝H 0(1-ε b)；
2), supplied materials thickness is H 0, Ze Hou district thickness is:
h h＝H 0(1-ε h)；
3), for meeting the flatness requirements of strip after cross rolling, thick district and intermediate thin district thickness difference are:
Δh g＝h h-h b＝0.1～0.5mm；
4), in order to avoid edge residual stress after strip cross rolling sharply changes cause local shape wave, getting width of transition zone is:
l g＝(100～400)Δh g；
5), thick sector width material follow the tracks of and shearing equipment allow scope in, get the small value as far as possible:
l h＝10～15mm；
6), blank overall width to be prepared is l, then intermediate thin sector width is:
l b＝l-2l h-2l g；
7), transition region curve adopts arc transition, if central angle corresponding to transition region circular arc is α, then now has:
R - R · c o s α = h h / 2 - h b / 2 R · sin α = l g ;
Can obtain transition arc radius R is:
R = l g 2 h h - h b + h h - h b 4 ;
If arc transition curve and point of contact, intermediate thin district are initial point; X-axis is trunnion axis, and positive direction points to the adjacent thick district of this transition region by thin district; Y-axis is vertical axis, and positive direction points to the center of circle of transition arc perpendicular to blank surface; Then on transition region circular arc, any point coordinate is (x, y), and it should meet:
(x-x c) 2+(y-y c) 2＝R 2；
Can this ordinate be:
y = R - R 2 - x 2 , x ∈ [ 0 , l g ] ;
Then the thickness of this some correspondence is:
h g(x)＝h b+2·y；
In formula, intermediate thin district reduction ratio ε b=10 ~ 15%, thick district reduction ratio ε h=5 ~ 10%, H 0for supplied materials thickness, l is blank overall width, h bfor intermediate thin district thickness, h hfor thick district thickness, Δ h gfor thick district and intermediate thin district thickness difference, l gfor width of transition zone, l hfor thick sector width, l bfor intermediate thin sector width, α is the central angle that transition region circular arc is corresponding, and R is transition arc radius, x c=0, y c=R.
When the transition connected mode of transition region is straight transitions connection, rolling blank method for determining dimension comprises the steps:
1), supplied materials thickness is H 0, then intermediate thin district thickness is:
h b＝H 0(1-ε b)；
2), supplied materials thickness is H 0, Ze Hou district thickness is:
h h＝H 0(1-ε h)；
3), for meeting the flatness requirements of strip after cross rolling, thick district and intermediate thin district thickness difference must meet:
Δh g＝h h-h b＝0.1～0.5mm；
4), in order to avoid edge residual stress after strip cross rolling sharply changes cause local shape wave, getting width of transition zone is:
l g＝(100～400)Δh g；
5), thick sector width material follow the tracks of and shearing equipment allow scope in, get the small value as far as possible:
l h＝10～15mm；
6), blank overall width to be prepared is l, then intermediate thin sector width is:
l b＝l-2l h-2l g；
7), transition region curve adopts straight transitions, adopt the slope of transitional straight to be:
k＝(h h/2-h b/2)/l g；
If arc transition curve and point of contact, intermediate thin district are initial point, because this straight line crosses initial point, if any point coordinate is (x, y) on transition region straight line, it should meet:
y＝k·x,x∈[0,l g]；
Then the thickness of this some correspondence is:
h g(x)＝h b+2·y；
In formula, intermediate thin district reduction ratio ε b=10 ~ 15%, thick district reduction ratio ε h=5 ~ 10%, H 0for supplied materials thickness, l is blank overall width, h bfor intermediate thin district thickness, h hfor thick district thickness, Δ h gfor thick district and intermediate thin district thickness difference, l gfor width of transition zone, l hfor thick sector width, l bfor intermediate thin sector width, k is the slope of transitional straight.
According to the geomery of the rolling blank determined, the step directly being prepared wide sheet rolling blank by Casting Rolled Sheet is:
1), rolling: molten state magnesium alloy forms roll-casting of magnesium alloy slab after casting and rolling machine casting, after casting and rolling machine, four-high mill is set, by the expression formula input AGC System of Rolling Mill of intermediate thin sector width and thickness, thick sector width and thickness and width of transition zone and thickness, utilize the remaining temperature of cast-rolled block, directly be rolled cast-rolled block: to roll-casting of magnesium alloy plate along its length, carrying out 1 percentage pass reduction is ε bthe rolling of=10 ~ 15%, forms intermediate thin district; Along rolling direction, it is ε that reduction ratio is carried out in the both sides, front and back in intermediate thin district hthe rolling of=5 ~ 10%, forms thick district; Along rolling direction, the wide sheet rolling blank of institute's rolling is the wide sheet rolling blank that thick district connects continuously with intermediate thin district;
2), trimming: to front step 1) the continuous wide breadth thin plate rolling blank that obtains after rolling carries out trimming;
3), scale segmentation: to front step 2) rolling blank after trimming is from cutting section in the middle of thick district;
4) plate, is piled up neatly for subsequent use: by for subsequent use for the wide sheet rolling blank stack plate after segmentation.
According to the geomery of the rolling blank determined, the step directly being prepared wide sheet rolling blank by Casting Rolled Sheet is:
1), trimming: molten state magnesium alloy forms cast-rolled block after casting and rolling machine casting, arranges cutter after casting and rolling machine, carries out trimming to Casting Rolled Sheet blank;
2), scale segmentation: carry out scale along rolling direction by the width of the wide sheet rolling blank determined,
When rolling blank transition region is arc transition, cut lengths L 0for:
L 0 = [ 2 l h h h + ( l b + 2 l g ) h b + 4 ∫ 0 l g ( R - R 2 - x 2 ) d x ] / H 0 ;
When rolling blank transition region is straight transitions, cut lengths L 0for:
L 0＝[2·l h·h h+l b·h b+2·(h h+h b)·l g/2]/H 0；
In formula, L 0for cut lengths, l hfor thick sector width, h hfor thick district thickness, l bfor intermediate thin sector width, l gfor width of transition zone, h bfor intermediate thin district thickness, R is transition arc radius, H 0for supplied materials thickness;
According to the cut lengths L determined 0, to front step 1) and the Casting Rolled Sheet blank that obtains after trimming is by the cut lengths section of being divided into;
3) plate, is piled up neatly for subsequent use: by for subsequent use for the Casting Rolled Sheet hack plate after segmentation;
4), rolling: by front step 3) cast-rolled block prepared carries out heating anneal, adopts four-high mill to be rolled: to roll-casting of magnesium alloy plate along its length, carrying out 1 percentage pass reduction is ε to the cast-rolled block after heating anneal bthe rolling of=10 ~ 15%, forms intermediate thin district; Along rolling direction, it is ε that reduction ratio is carried out in the front and back in intermediate thin district hthe rolling of=5 ~ 10%, forms thick district, obtains wide sheet rolling blank, and buttress plate is for subsequent use.
According to the geomery of the rolling blank determined, the step of being rolled up Direct Rolling wide sheet rolling blank by casting is:
1), uncoiling aligning: carry out uncoiling at uncoiler after casting being rolled up heating anneal, align through straightener;
2), rolling: four-high mill is set after straightener, by the expression formula input AGC System of Rolling Mill of intermediate thin sector width and thickness, thick sector width and thickness and width of transition zone and thickness, roll-casting of magnesium alloy slab after aligning is rolled: to roll-casting of magnesium alloy plate along its length, carrying out 1 percentage pass reduction is ε bthe rolling of=10 ~ 15%, forms intermediate thin district; Along rolling direction, it is ε that reduction ratio is carried out in the both sides, front and back in intermediate thin district hthe rolling of=5 ~ 10%, forms thick district; Along rolling direction, the wide sheet rolling blank of institute's rolling is the wide sheet rolling blank that thick district connects continuously with intermediate thin district;
3), trimming: to front step 2) the continuous wide breadth thin plate rolling blank that obtains after rolling carries out trimming;
4), scale segmentation: to front step 2) rolling blank after trimming is from cutting section in the middle of thick district;
5) plate, is piled up neatly for subsequent use: by for subsequent use for the wide sheet rolling blank stack plate after segmentation.
According to the geomery of the rolling blank determined, the step of being rolled up Direct Rolling wide sheet rolling blank by casting is:
1), uncoiling aligning: carry out uncoiling at uncoiler after casting being rolled up heating anneal, align through straightener;
2), trimming: cutter is set after straightener, trimming is carried out to the roll-casting of magnesium alloy plate after aligning;
3), scale segmentation: carry out scale along rolling direction by the width of the wide sheet rolling blank determined,
When rolling blank transition region is arc transition, cut lengths L 0for:
L 0 = [ 2 l h h h + ( l b + 2 l g ) h b + 4 ∫ 0 l g ( R - R 2 - x 2 ) d x ] / H 0 ;
When rolling blank transition region is straight transitions, cut lengths L 0for:
L 0＝[2·l h·h h+l b·h b+2·(h h+h b)·l g/2]/H 0；
In formula, in formula, L 0for cut lengths, l hfor thick sector width, h hfor thick district thickness, l bfor intermediate thin sector width, l gfor width of transition zone, h bfor intermediate thin district thickness, R is transition arc radius, H 0for supplied materials thickness.
According to the cut lengths L determined 0, to front step 2) and the Casting Rolled Sheet blank that obtains after trimming is by the cut lengths section of being divided into;
4) plate, is piled up neatly for subsequent use: by for subsequent use for the Casting Rolled Sheet hack plate after segmentation;
5), rolling: by front step 4) cast-rolled block prepared carries out heating anneal, adopts four-high mill to be rolled: to roll-casting of magnesium alloy plate along its length, carrying out 1 percentage pass reduction is ε to the cast-rolled block after heating anneal bthe rolling of=10 ~ 15%, forms intermediate thin district; Along rolling direction, it is ε that reduction ratio is carried out in the front and back in intermediate thin district hthe rolling of=5 ~ 10%, forms thick district, obtains wide sheet rolling blank, and buttress plate is for subsequent use.
The milling method of magnesium alloy wide-width thin plate is: after rolling blank for subsequent use for buttress plate is carried out heating anneal, start rolling temperature is 380 DEG C ~ 410 DEG C, finishing temperature is not less than 120 DEG C, roller temperature is 120 ~ 200 DEG C, control percentage pass reduction <30%, end percentage pass reduction <15%, through 3 ~ 9 passes, namely obtains magnesium alloy wide-width thin plate.
Described roll-casting of magnesium alloy width of plate slab is 600 ~ 1200mm, and thickness is 6.0 ~ 8.0mm; Described magnesium alloy wide-width lamella thickness is 1.0 ~ 3.0mm, and width is 1200 ~ 2000mm.
The present invention has following beneficial effect compared to prior art.
1, the easement curve of transition region is the advantage of arc transition: arc transition curve combines less length of transition zone, can make transition region and thick district cohesive position varied in thickness speed very fast, being applicable to limit, to split relatively serious, thickness be product between 1.0 ~ 1.5mm, and when cross rolling, to bear compression larger for its edge.
2, the easement curve of transition region is the advantage of straight transitions: straight transitions curve combines larger width of transition zone, whole transition region can be made to adopt identical varied in thickness speed, being applicable to limit, to split relatively light, thickness be product between 1.5 ~ 3.0mm, and when cross rolling, to bear compression less for its edge.
3, the present invention provides excellent blank for roll-casting of magnesium alloy plate Direct Rolling magnesium alloy wide-width thin plate, and for follow-up cross rolling provides powerful guarantee, ratio is split on limit when reducing cross rolling, improves lumber recovery.
Accompanying drawing explanation
Fig. 1 is transition region rolling blank cross-sectional view when being circular sliding slopes.
Fig. 2 is that arc transition connects the rolling blank top view being connected two kinds of transition connected modes with straight transitions.
Fig. 3 to be transition region be when straight line connects rolling blank cross-sectional view.
Fig. 4 is the shaping rolling process schematic diagram that embodiment one prepares magnesium alloy wide-width thin plate rolling blank.
Fig. 5 is the shaping rolling process schematic diagram that embodiment two prepares magnesium alloy wide-width thin plate rolling blank.
Fig. 6 is the shaping rolling process schematic diagram that embodiment three prepares magnesium alloy wide-width thin plate rolling blank.
Fig. 7 is the shaping rolling process schematic diagram that embodiment four prepares magnesium alloy wide-width thin plate rolling blank.
In figure, I, I ' is thick district, and II, II ' is transition region, and III is intermediate thin district, and 1 is lip, and 2 is casting and rolling machine, and 3 is Casting Rolled Sheet, and 4 is hydraulic cylinder, and 5 is milling train, and 6 is cutter, and 7 is sheet piler platform, and 8 is uncoiler, and 9 is straightener.
Detailed description of the invention
By following embodiment, the present invention may be better understood, but this example is not used for limiting the present invention.
Embodiment one:
Choosing rolling kind is AZ31, and supplied materials width is 600mm, and supplied materials thickness is 6.0mm, and magnesium alloy wide-width light sheet products thickness 1.5mm, width l are 1600mm.
As shown in Fig. 1 ~ 2, the process of wide sheet prepared by roll-casting of magnesium alloy plate, it is characterized in that: the rolling mill practice of magnesium alloy wide-width thin plate comprises the steps:
(1), the determination of wide sheet rolling blank geomery, wide sheet rolling blank cross section comprises intermediate thin district, both sides, intermediate thin district arrange thick district, adopt transition region to be connected between thick district with intermediate thin district, and the sotck thinkness of transition region reduces from thick district continuously to intermediate thin district.
The intermediate thin district reduction ratio ε of the present embodiment blank bbeing 15%, Ze Zhahou intermediate thin district thickness is: h b=5.1mm; Thick district reduction ratio ε hgetting 10%, Ze Zhahouhou district thickness is: h h=5.4mm; Thick sector width is: l h=10mm; Width of transition zone is: l g=200 Δ h g=200 × 0.3=60mm.
Intermediate thin sector width is: l b=l-2l h-2l g=1600-2 × 10-2 × 60=1460mm.
Transition region easement curve presses the transition of circular arc type form, as shown in Fig. 1 ~ 2, if α is the central angle that transition region transition arc is corresponding, then now has:
R - R &CenterDot; c o s &alpha; = h h / 2 - h b / 2 = 0.15 R &CenterDot; sin &alpha; = l g = 60
Can obtain transition arc radius is:
R = l g 2 h h - h b + h h - h b 4 = 12000.075 m m ;
If arc transition curve and point of contact, intermediate thin district are initial point; X-axis is trunnion axis, and positive direction points to the adjacent thick district of this transition region by thin district; Y-axis is vertical axis, and positive direction points to the center of circle of transition arc perpendicular to blank surface; Then on transition region circular arc, any point coordinate is (x, y), and it should meet:
(x-x c) 2+(y-y c) 2＝R 2；
Wherein, x c=0, y c=R;
Can this ordinate be:
y = R - R 2 - x 2 , x &Element; &lsqb; 0 , l g &rsqb; ;
Then the thickness of this some correspondence is:
h g(x)＝h b+2·y；
Namely the geomery of magnesium alloy wide-width thin plate rolling blank is determined.
(2), the rolling of wide sheet rolling blank
As shown in Figure 4:
1), rolling: molten state magnesium alloy forms roll-casting of magnesium alloy slab after casting and rolling machine casting, after casting and rolling machine, four-high mill is set, by the expression formula input AGC System of Rolling Mill of intermediate thin sector width and thickness, thick sector width and thickness and width of transition zone and thickness, utilize the remaining temperature of cast-rolled block, directly be rolled cast-rolled block: to roll-casting of magnesium alloy plate along its length, carrying out 1 percentage pass reduction is ε bthe rolling of=15%, forms intermediate thin district; Along rolling direction, it is ε that reduction ratio is carried out in the both sides, front and back in intermediate thin district hthe rolling of=10%, forms thick district; Along rolling direction, it is the wide sheet rolling blank that thick district connects continuously with intermediate thin district that the wide sheet of institute's rolling rolls plate blank material;
2), trimming: to front step 1) the continuous wide breadth thin plate rolling blank that obtains after rolling carries out trimming, getting continuous rolling blank trimming amount is monolateral 20mm, then continuous rolling blank width is 560mm;
3), scale segmentation: to front step 2) rolling blank after trimming is from cutting section in the middle of thick district, concrete grammar is: accurate tracking system keeps track in position carries out cutting to length segmentation to blank when thick sector width is 10mm place, obtains thin sector width l bfor 1460mm, thick sector width l hfor 10mm, width of transition zone l gfor 60mm, blank section overall width l is that the wide sheet of 1600mm rolls plate blank material;
4) plate, is piled up neatly for subsequent use: by for subsequent use for the wide sheet rolling blank stack plate after segmentation.
(3), wide sheet rolling
After plate blank material carries out heating anneal by for subsequent use the rolling of front step (two) buttress plate, four rollers or six roller temperature cold-rolling mills are utilized to be h to intermediate thin district thickness b=5.1mm, thick district thickness is h h=5.4mm, blank width is 1600mm, charge length is that the magnesium alloy slab of 560mm is rolled, and start rolling temperature is 380 DEG C, finishing temperature 120 DEG C, roller temperature is 120 DEG C, through 3 passes, control percentage pass reduction < 30%, last percentage pass reduction < 15%, obtaining thickness is 1.5mm, and width is the magnesium alloy wide-width thin plate of 1600mm.
Embodiment two:
Choosing rolling kind is AZ31, and supplied materials width is 1000mm, and supplied materials thickness is 8.0mm, and magnesium alloy wide-width light sheet products thickness 1.0mm, width are 2000mm.
As shown in figures 2-3, wide sheet rolling blank transverse shape comprises intermediate thin district, and both sides, intermediate thin district arrange thick district, adopt transition region to be connected between thick district with intermediate thin district, and the sotck thinkness of transition region reduces from thick district continuously to intermediate thin district.The transition connected mode of the present embodiment two transition region is that straight transitions connects.
The operation of rolling of magnesium alloy wide-width thin plate adopts following steps to carry out successively:
(1), the determination of rolling blank geomery
The intermediate thin district reduction ratio ε of the present embodiment two blank bbeing 10%, Ze Zhahou intermediate thin district thickness is: h b=7.2mm; Thick district reduction ratio ε hgetting 7.5%, Ze Zhahouhou district thickness is: h h=7.4mm; Thick sector width is: l h=15mm; Width of transition zone is: l g=300 Δ h g=300 × 0.2=60mm.
Intermediate thin sector width is l b=l-2l h-2l g=2000-2 × 15-2 × 60=1850mm.
As shown in figures 2-3, transition region easement curve is straight line, length of transition zone l gfor 60mm, thick district and intermediate thin district thickness difference are 0.2mm, then the slope of adopted transitional straight is:
k＝(h h/2-h b/2)/l g＝0.1/60＝1/600；
Because this straight line crosses initial point, if any point coordinate is (x, y) on transition region straight line, it should meet:
y＝k·x＝1/600·x,x∈[0,60]；
Then the thickness of this some correspondence is:
h g(x)＝h b+2·y；
Namely the geomery of rolling blank is determined.
(2), wide sheet rolling blank rolling
As shown in Figure 5:
1), trimming: molten state magnesium alloy forms cast-rolled block after casting and rolling machine casting, arranges cutter after casting and rolling machine, is that 20mm carries out trimming to Casting Rolled Sheet blank by monolateral trimming amount;
2), scale segmentation: to front step 1) the Casting Rolled Sheet blank that obtains after trimming carries out scale, cut lengths L along rolling direction by the width of the wide sheet rolling blank determined 0for:
L 0＝[2·l h·h h+l b·h b+2·(h h+h b)·l g/2]/H 0＝1802.25mm
Obtain after scale that thickness is 8.0mm, width is 960mm, length is the slab of 1802.25mm;
3) plate, is piled up neatly for subsequent use: by for subsequent use for the Casting Rolled Sheet hack plate after segmentation;
4), rolling: by front step 3) cast-rolled block prepared carries out heating anneal, adopts four rollers or six roller temperature cold-rolling mills to be rolled: to roll-casting of magnesium alloy plate along its length, carrying out 1 percentage pass reduction is ε to the cast-rolled block after heating anneal bthe rolling of=10%, forms intermediate thin district; Along rolling direction, it is ε that reduction ratio is carried out in the both sides, front and back in intermediate thin district hthe rolling of=7.5%, forms thick district; Roll plate blank material cross section and comprise intermediate thin district, both sides, intermediate thin district arrange thick district, adopt transition region to be connected between thick district with intermediate thin district, and the sotck thinkness of transition region reduces from thick district continuously to intermediate thin district; Obtain thin sector width l bfor 1850mm, thick sector width l hfor 15mm, width of transition zone l gfor 60mm, blank section overall width l is the wide sheet rolling blank of 2000mm, and buttress plate is for subsequent use.
(3), wide sheet rolling
After rolling blank for subsequent use for front step (two) buttress plate is carried out heating anneal, four roller/six roller temperature cold-rolling mills are utilized to be h to intermediate thin district thickness b=7.2mm, thick district thickness is h h=7.4mm, blank width is 2000mm, charge length is that the magnesium alloy slab 90-degree rotation of 960mm is rolled, and start rolling temperature is 390 DEG C, finishing temperature 150 DEG C, roller temperature is 160 DEG C, through 6 passes, control percentage pass reduction < 30%, last percentage pass reduction < 15%, obtaining thickness is 1.0mm, and width is the magnesium alloy wide-width thin plate of 2000mm.
Embodiment three
Choosing rolling kind is AZ31, and supplied materials width is 600mm, and supplied materials thickness is 6.0mm, and magnesium alloy wide-width light sheet products thickness 1.5mm, width l are 1600mm.
As shown in Fig. 1 ~ 2, wide sheet rolling blank transverse shape comprises intermediate thin district, and both sides, intermediate thin district arrange thick district, adopt transition region to be connected between thick district with intermediate thin district, and the sotck thinkness of transition region reduces from thick district continuously to intermediate thin district.The transition connected mode of the present embodiment three transition region is that arc transition connects.
The operation of rolling of magnesium alloy wide-width thin plate adopts following steps to carry out successively:
(1), the determination of rolling blank geomery
The present embodiment three rolling blank intermediate thin district reduction ratio ε bbeing 15%, Ze Zhahou intermediate thin district thickness is: h b=5.1mm; Thick district reduction ratio ε hgetting 10%, Ze Zhahouhou district thickness is: h h=5.4mm; Thick sector width is: l h=10mm; Width of transition zone is: l g=200 Δ h g=200 × 0.3=60mm.
Intermediate thin sector width is: l b=l-2l h-2l g=1600-2 × 10-2 × 60=1460mm.
Transition region easement curve presses the transition of circular arc type form, as shown in Fig. 1 ~ 2, if α is the central angle that transition region transition arc is corresponding, then now has:
R - R &CenterDot; c o s &alpha; = h h / 2 - h b / 2 = 0.15 R &CenterDot; s i n &alpha; = l g = 60 ;
Can obtain transition arc radius is:
R = l g 2 h h - h b + h h - h b 4 = 12000.075 m m ;
If any point coordinate is (x, y) on transition region circular arc, it should meet:
(x-x c) 2+(y-y c) 2＝R 2；
Wherein, x c=0, y c=R;
Can this ordinate be:
y = R - R 2 - x 2 , x &Element; &lsqb; 0 , l g &rsqb; ;
Then the thickness of this some correspondence is:
h g(x)＝h b+2·y；
Namely the geomery of magnesium alloy wide-width thin plate rolling blank is determined.
(2), the rolling of wide sheet rolling blank
As shown in Figure 6:
1), align: carry out uncoiling at uncoiler after casting being rolled up heating anneal, align through straightener;
2), trimming: the cast-rolled block after aligning is that 20mm carries out trimming to Casting Rolled Sheet blank by monolateral trimming amount;
3), scale segmentation: to front step 2) the Casting Rolled Sheet blank that obtains after trimming carries out scale along rolling direction by the width of the wide sheet rolling blank determined, in the present embodiment three, rolling blank transition region is arc transition, cut lengths L 0for:
L 0 = &lsqb; 2 l h h h + ( l b + 2 l g ) h b + 4 &Integral; 0 l g ( R - R 2 - x 2 ) d x &rsqb; / H 0 = 1596.03 m m ;
In formula, in formula, L 0for cut lengths, l hfor thick sector width, h hfor thick district thickness, l bfor intermediate thin sector width, l gfor width of transition zone, h bfor intermediate thin district thickness, R is transition arc radius, H 0for supplied materials thickness;
According to the cut lengths L determined 0, to front step 2) and the Casting Rolled Sheet blank that obtains after trimming is by the cut lengths section of being divided into.Obtain after scale that thickness is 6mm, width is 540mm, length is the slab of 1596.03mm;
4) plate, is piled up neatly for subsequent use: by for subsequent use for the Casting Rolled Sheet hack plate after segmentation;
5), rolling: form roll-casting of magnesium alloy slab after aligning and be delivered to four-high mill, by the expression formula input AGC System of Rolling Mill of intermediate thin sector width and thickness, thick sector width and thickness and width of transition zone and thickness, utilize the remaining temperature of cast-rolled block, directly be rolled cast-rolled block: to roll-casting of magnesium alloy plate along its length, carrying out 1 percentage pass reduction is ε bthe rolling of=15%, forms intermediate thin district; Along rolling direction, it is ε that reduction ratio is carried out in the both sides, front and back in intermediate thin district hthe rolling of=10%, forms thick district.Thin sector width l is obtained after rolling bfor 1460mm, thick sector width l hfor 10mm, width of transition zone l gfor 60mm, blank section overall width l is the wide sheet rolling blank of 1600mm, and buttress plate is for subsequent use.
(3), wide sheet rolling
After plate blank material carries out heating anneal by for subsequent use the rolling of front step (two) buttress plate, four rollers or six roller temperature cold-rolling mills are utilized to be h to intermediate thin district thickness b=5.1mm, thick district thickness is h h=5.7mm, blank width is 1600mm, charge length is that the magnesium alloy slab of 560mm is rolled, and start rolling temperature is 380 DEG C, finishing temperature 120 DEG C, roller temperature is 120 DEG C, through 3 passes, control percentage pass reduction < 30%, last percentage pass reduction < 15%, obtaining thickness is 1.5mm, and width is the magnesium alloy wide-width thin plate of 1600mm.
Embodiment four
Choosing rolling kind is AZ31, and supplied materials width is 1000mm, and supplied materials thickness is 8.0mm, and magnesium alloy wide-width light sheet products thickness 1.0mm, width are 2000mm.
As shown in figures 2-3, wide sheet rolling blank transverse shape comprises intermediate thin district, and both sides, intermediate thin district arrange thick district, adopt transition region to be connected between thick district with intermediate thin district, and the sotck thinkness of transition region reduces from thick district continuously to intermediate thin district.The transition connected mode of the present embodiment four transition region is that straight transitions connects.
The operation of rolling of magnesium alloy wide-width thin plate adopts following steps to carry out successively:
(1), the determination of rolling blank geomery
The intermediate thin district reduction ratio ε of the present embodiment four blank bbeing 10%, Ze Zhahou intermediate thin district thickness is: h b=7.2mm; Thick district reduction ratio ε hgetting 7.5%, Ze Zhahouhou district thickness is: h h=7.4mm; Thick sector width is: l h=15mm; Width of transition zone is: l g=300 Δ h g=300 × 0.2=60mm.
Intermediate thin sector width is l b=l-2l h-2l g=2000-2 × 15-2 × 60=1850mm:.
As shown in figures 2-3, transition region easement curve is straight line, length of transition zone l gfor 60mm, thick district and intermediate thin district thickness difference are 0.2mm, then the slope of adopted transitional straight is:
k＝(h h/2-h b/2)/l g＝0.1/60＝1/600；
Because this straight line crosses initial point, if any point coordinate is (x, y) on transition region straight line, it should meet:
y＝k·x＝1/600·x,x∈[0,60]；
Then the thickness of this some correspondence is:
h g(x)＝h b+2·y；
Namely the geomery of rolling blank is determined.
(2), wide sheet rolling blank rolling
As shown in Figure 7:
1), align: carry out uncoiling at uncoiler after casting being rolled up heating anneal, align through straightener;
2), rolling: four-high mill is set after straightener, roll-casting of magnesium alloy slab after aligning is delivered to four-high mill, by the expression formula input AGC System of Rolling Mill of intermediate thin sector width and thickness, thick sector width and thickness and width of transition zone and thickness, be rolled cast-rolled block: to roll-casting of magnesium alloy plate along its length, carrying out 1 percentage pass reduction is ε bthe rolling of=10%, forms intermediate thin district; Along rolling direction, it is ε that reduction ratio is carried out in the both sides, front and back in intermediate thin district hthe rolling of=7.5%, forms thick district; Along rolling direction, it is the wide sheet rolling blank that thick district connects continuously with intermediate thin district that the wide sheet of institute's rolling rolls plate blank material;
3), trimming: to front step 2) the continuous wide breadth thin plate rolling blank that obtains after rolling carries out trimming, getting continuous rolling blank trimming amount is monolateral 20mm, then continuous rolling blank width is 960mm;
4), scale segmentation: to front step 3) rolling blank after trimming is from cutting section in the middle of thick district, concrete grammar is: accurate tracking system keeps track in position carries out cutting to length segmentation to blank when thick sector width is 15mm place, obtains thin sector width l bfor 1850mm, thick sector width l hfor 15mm, width of transition zone l gfor 60mm, blank section overall width l is that the wide sheet of 2000mm rolls plate blank material;
5) plate, is piled up neatly for subsequent use: by for subsequent use for the wide sheet rolling blank stack plate after segmentation.
(3), wide sheet rolling
After rolling blank for subsequent use for front step (two) buttress plate is carried out heating anneal, four roller/six roller temperature cold-rolling mills are utilized to be h to intermediate thin district thickness b=7.2mm, thick district thickness is h h=7.4mm, blank width is 2000mm, charge length is that the magnesium alloy slab 90-degree rotation of 960mm is rolled, and start rolling temperature is 390 DEG C, finishing temperature 150 DEG C, roller temperature is 160 DEG C, through 6 passes, control percentage pass reduction < 30%, last percentage pass reduction < 15%, obtaining thickness is 1.0mm, and width is the magnesium alloy wide-width thin plate of 2000mm.
By reference to the accompanying drawings embodiments of the invention are explained in detail above, but the present invention is not limited to above-described embodiment, in the ken that those of ordinary skill in the art possess, various change can also be made under the prerequisite not departing from present inventive concept.

Claims (10)

1. the process of wide sheet prepared by roll-casting of magnesium alloy plate, it is characterized in that: the rolling mill practice of magnesium alloy wide-width thin plate comprises the steps: the determination of (), wide sheet rolling blank geomery, wide sheet rolling blank cross section comprises intermediate thin district, both sides, intermediate thin district arrange thick district, adopt transition region to be connected between thick district with intermediate thin district, the sotck thinkness of transition region reduces from thick district continuously to intermediate thin district; (2), the rolling of wide sheet rolling blank; (3), wide sheet rolling.
2. the process of wide sheet prepared by roll-casting of magnesium alloy plate according to claim 1, it is characterized by: the transition connected mode of transition region is that arc transition connects or straight transitions connects.
3. the process of wide sheet prepared by roll-casting of magnesium alloy plate according to claim 2, it is characterized by: when the transition connected mode of transition region is arc transition connection, rolling blank method for determining dimension comprises the steps:
1), supplied materials thickness is H 0, then intermediate thin district thickness is:
h b＝H 0(1-ε b)；
2), supplied materials thickness is H 0, Ze Hou district thickness is:
h h＝H 0(1-ε h)；
3), for meeting the flatness requirements of strip after cross rolling, thick district and intermediate thin district thickness difference are:
Δh g＝h h-h b＝0.1～0.5mm；
4), in order to avoid edge residual stress after strip cross rolling sharply changes cause local shape wave, getting width of transition zone is:
l g＝(100～400)Δh g；
5), thick sector width material follow the tracks of and shearing equipment allow scope in, get the small value as far as possible:
l h＝10～15mm；
6), blank overall width to be prepared is l, then intermediate thin sector width is:
l b＝l-2l h-2l g；
7), transition region curve adopts arc transition, if central angle corresponding to transition region circular arc is α, then now has:
R - R &CenterDot; c o s &alpha; = h h / 2 - h b / 2 R &CenterDot; sin &alpha; = l g ;
Can obtain transition arc radius R is:
R = l g 2 h h - h b + h h - h b 4 ;
If arc transition curve and point of contact, intermediate thin district are initial point; X-axis is trunnion axis, and positive direction points to the adjacent thick district of this transition region by thin district; Y-axis is vertical axis, and positive direction points to the center of circle of transition arc perpendicular to blank surface; Then on transition region circular arc, any point coordinate is (x, y), and it should meet:
(x-x c) 2+(y-y c) 2＝R 2；
Can this ordinate be:
y = R - R 2 - x 2 , x &Element; &lsqb; 0 , l g &rsqb; ;
Then the thickness of this some correspondence is:
h g(x)＝h b+2·y；
In formula, intermediate thin district reduction ratio ε b=10 ~ 15%, thick district reduction ratio ε h=5 ~ 10%, H 0for supplied materials thickness, l is blank overall width, h bfor intermediate thin district thickness, h hfor thick district thickness, Δ h gfor thick district and intermediate thin district thickness difference, l gfor width of transition zone, l hfor thick sector width, l bfor intermediate thin sector width, α is the central angle that transition region circular arc is corresponding, and R is transition arc radius, x c=0, y c=R.
4. the process of wide sheet prepared by roll-casting of magnesium alloy plate according to claim 2, it is characterized by: when the transition connected mode of transition region is straight transitions connection, rolling blank method for determining dimension comprises the steps:
1), supplied materials thickness is H 0, then intermediate thin district thickness is:
h b＝H 0(1-ε b)；
2), supplied materials thickness is H 0, Ze Hou district thickness is:
h h＝H 0(1-ε h)；
3), for meeting the flatness requirements of strip after cross rolling, thick district and intermediate thin district thickness difference must meet:
Δh g＝h h-h b＝0.1～0.5mm；
4), in order to avoid edge residual stress after strip cross rolling sharply changes cause local shape wave, getting width of transition zone is:
l g＝(100～400)Δh g；
5), thick sector width material follow the tracks of and shearing equipment allow scope in, get the small value as far as possible:
l h＝10～15mm；
6), blank overall width to be prepared is l, then intermediate thin sector width is:
l b＝l-2l h-2l g；
7), transition region curve adopts straight transitions, adopt the slope of transitional straight to be:
k＝(h h/2-h b/2)/l g；
If arc transition curve and point of contact, intermediate thin district are initial point, because this straight line crosses initial point, if arbitrary on transition region straight line
Point coordinates is (x, y), and it should meet:
y＝k·x,x∈[0,l g]；
Then the thickness of this some correspondence is:
h g(x)＝h b+2·y；
In formula, intermediate thin district reduction ratio ε b=10 ~ 15%, thick district reduction ratio ε h=5 ~ 10%, H 0for supplied materials thickness, l is blank overall width, h bfor intermediate thin district thickness, h hfor thick district thickness, Δ h gfor thick district and intermediate thin district thickness difference, l gfor width of transition zone, l hfor thick sector width, l bfor intermediate thin sector width, k is the slope of transitional straight.
5. prepare the process of wide sheet according to the arbitrary described roll-casting of magnesium alloy plate of Claims 1 to 4, it is characterized by: according to the geomery of the rolling blank determined, the step directly being prepared wide sheet rolling blank by Casting Rolled Sheet is:
1), rolling: molten state magnesium alloy forms roll-casting of magnesium alloy slab after casting and rolling machine casting, after casting and rolling machine, four-high mill is set, by the expression formula input AGC System of Rolling Mill of intermediate thin sector width and thickness, thick sector width and thickness and width of transition zone and thickness, utilize the remaining temperature of cast-rolled block, directly be rolled cast-rolled block: to roll-casting of magnesium alloy plate along its length, carrying out 1 percentage pass reduction is ε bthe rolling of=10 ~ 15%, forms intermediate thin district; Along rolling direction, it is ε that reduction ratio is carried out in the both sides, front and back in intermediate thin district hthe rolling of=5 ~ 10%, forms thick district; Along rolling direction, the wide sheet rolling blank of institute's rolling is the wide sheet rolling blank that thick district connects continuously with intermediate thin district;
2), trimming: to front step 1) the continuous wide breadth thin plate rolling blank that obtains after rolling carries out trimming;
3), scale segmentation: to front step 2) rolling blank after trimming is from cutting section in the middle of thick district;
4) plate, is piled up neatly for subsequent use: by for subsequent use for the wide sheet rolling blank stack plate after segmentation.
6. prepare the process of wide sheet according to the arbitrary described roll-casting of magnesium alloy plate of Claims 1 to 4, it is characterized by: according to the geomery of the rolling blank determined, the step directly being prepared wide sheet rolling blank by Casting Rolled Sheet is:
1), trimming: molten state magnesium alloy forms cast-rolled block after casting and rolling machine casting, arranges cutter after casting and rolling machine, carries out trimming to Casting Rolled Sheet blank;
2), scale segmentation: carry out scale along rolling direction by the width of the wide sheet rolling blank determined,
When rolling blank transition region is arc transition, cut lengths L 0for:
L 0 = &lsqb; 2 l h h h + ( l b + 2 l g ) h b + 4 &Integral; 0 l g ( R - R 2 - x 2 ) d x &rsqb; / H 0 ;
When rolling blank transition region is straight transitions, cut lengths L 0for:
L 0＝[2·l h·h h+l b·h b+2·(h h+h b)·l g/2]/H 0；
In formula, L 0for cut lengths, l hfor thick sector width, h hfor thick district thickness, l bfor intermediate thin sector width, l gfor width of transition zone, h bfor intermediate thin district thickness, R is transition arc radius, H 0for supplied materials thickness;
According to the cut lengths L determined 0, to front step 1) and the Casting Rolled Sheet blank that obtains after trimming is by the cut lengths section of being divided into;
3) plate, is piled up neatly for subsequent use: by for subsequent use for the Casting Rolled Sheet hack plate after segmentation;
4), rolling: by front step 3) cast-rolled block prepared carries out heating anneal, adopts four-high mill to be rolled: to roll-casting of magnesium alloy plate along its length, carrying out 1 percentage pass reduction is ε to the cast-rolled block after heating anneal bthe rolling of=10 ~ 15%, forms intermediate thin district; Along rolling direction, it is ε that reduction ratio is carried out in the front and back in intermediate thin district hthe rolling of=5 ~ 10%, forms thick district, obtains wide sheet rolling blank, and buttress plate is for subsequent use.
7. the process of wide sheet prepared by roll-casting of magnesium alloy plate according to claim 5, it is characterized by: according to the geomery of the rolling blank determined, the step of being rolled up Direct Rolling wide sheet rolling blank by casting is:
1), uncoiling aligning: carry out uncoiling at uncoiler after casting being rolled up heating anneal, align through straightener;
2), rolling: four-high mill is set after straightener, by the expression formula input AGC System of Rolling Mill of intermediate thin sector width and thickness, thick sector width and thickness and width of transition zone and thickness, roll-casting of magnesium alloy slab after aligning is rolled: to roll-casting of magnesium alloy plate along its length, carrying out 1 percentage pass reduction is ε bthe rolling of=10 ~ 15%, forms intermediate thin district; Along rolling direction, it is ε that reduction ratio is carried out in the both sides, front and back in intermediate thin district hthe rolling of=5 ~ 10%, forms thick district; Along rolling direction, the wide sheet rolling blank of institute's rolling is the wide sheet rolling blank that thick district connects continuously with intermediate thin district;
3), trimming: to front step 2) the continuous wide breadth thin plate rolling blank that obtains after rolling carries out trimming;
4), scale segmentation: to front step 2) rolling blank after trimming is from cutting section in the middle of thick district;
5) plate, is piled up neatly for subsequent use: by for subsequent use for the wide sheet rolling blank stack plate after segmentation.
8. the process of wide sheet prepared by roll-casting of magnesium alloy plate according to claim 6, it is characterized by: according to the geomery of the rolling blank determined, the step of being rolled up Direct Rolling wide sheet rolling blank by casting is:
1), uncoiling aligning: carry out uncoiling at uncoiler after casting being rolled up heating anneal, align through straightener;
2), trimming: cutter is set after straightener, trimming is carried out to the roll-casting of magnesium alloy plate after aligning;
3), scale segmentation: carry out scale along rolling direction by the width of the wide sheet rolling blank determined,
When rolling blank transition region is arc transition, cut lengths L 0for:
L 0 = &lsqb; 2 l h h h + ( l b + 2 l g ) h b + 4 &Integral; 0 l g ( R - R 2 - x 2 ) d x &rsqb; / H 0 ;
When rolling blank transition region is straight transitions, cut lengths L 0for:
L 0＝[2·l h·h h+l b·h b+2·(h h+h b)·l g/2]/H 0；
In formula, in formula, L 0for cut lengths, l hfor thick sector width, h hfor thick district thickness, l bfor intermediate thin sector width, l gfor width of transition zone, h bfor intermediate thin district thickness, R is transition arc radius, H 0for supplied materials thickness.
According to the cut lengths L determined 0, to front step 2) and the Casting Rolled Sheet blank that obtains after trimming is by the cut lengths section of being divided into;
4) plate, is piled up neatly for subsequent use: by for subsequent use for the Casting Rolled Sheet hack plate after segmentation;
5), rolling: by front step 4) cast-rolled block prepared carries out heating anneal, adopts four-high mill to be rolled: to roll-casting of magnesium alloy plate along its length, carrying out 1 percentage pass reduction is ε to the cast-rolled block after heating anneal bthe rolling of=10 ~ 15%, forms intermediate thin district; Along rolling direction, it is ε that reduction ratio is carried out in the front and back in intermediate thin district hthe rolling of=5 ~ 10%, forms thick district, obtains wide sheet rolling blank, and buttress plate is for subsequent use.
9. the process of wide sheet prepared by the roll-casting of magnesium alloy plate according to claim 7 or 8, it is characterized by: the milling method of magnesium alloy wide-width thin plate is: after rolling blank for subsequent use for buttress plate is carried out heating anneal, start rolling temperature is 380 DEG C ~ 410 DEG C, finishing temperature is not less than 120 DEG C, roller temperature is 120 ~ 200 DEG C, controls percentage pass reduction <30%, last percentage pass reduction <15%, through 3 ~ 9 passes, namely obtain magnesium alloy wide-width thin plate.
10. the process of wide sheet prepared by roll-casting of magnesium alloy plate according to claim 9, it is characterized by: described roll-casting of magnesium alloy width of plate slab is 600 ~ 1200mm, and thickness is 6.0 ~ 8.0mm; Described magnesium alloy wide-width lamella thickness is 1.0 ~ 3.0mm, and width is 1200 ~ 2000mm.
CN201510854891.1A 2015-11-30 2015-11-30 Roll-casting of magnesium alloy plate prepares the process of wide sheet Active CN105414183B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510854891.1A CN105414183B (en) 2015-11-30 2015-11-30 Roll-casting of magnesium alloy plate prepares the process of wide sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510854891.1A CN105414183B (en) 2015-11-30 2015-11-30 Roll-casting of magnesium alloy plate prepares the process of wide sheet

Publications (2)

Publication Number Publication Date
CN105414183A true CN105414183A (en) 2016-03-23
CN105414183B CN105414183B (en) 2018-06-26

Family

ID=55492969

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510854891.1A Active CN105414183B (en) 2015-11-30 2015-11-30 Roll-casting of magnesium alloy plate prepares the process of wide sheet

Country Status (1)

Country Link
CN (1) CN105414183B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108941208A (en) * 2017-05-24 2018-12-07 宝山钢铁股份有限公司 A kind of roughing width control method of slab
CN112077142A (en) * 2020-08-05 2020-12-15 首钢京唐钢铁联合有限责任公司 Rolling method and device of 8CrV saw blade steel

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101462123A (en) * 2009-01-09 2009-06-24 清华大学 Method for preparing high-performance magnesium alloy sheet
CN101648210A (en) * 2009-08-28 2010-02-17 中铝洛阳铜业有限公司 Processing method for rolling magnesium alloy plate with low temperature, high speed and large processing amount
CN101607267B (en) * 2009-07-07 2012-07-04 东北大学 Curve transition method between thick regions and thin regions of periodic longitudinal variable-thickness strip
JP5740827B2 (en) * 2010-03-30 2015-07-01 Ｊｆｅスチール株式会社 Thick plate rolling method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101462123A (en) * 2009-01-09 2009-06-24 清华大学 Method for preparing high-performance magnesium alloy sheet
CN101607267B (en) * 2009-07-07 2012-07-04 东北大学 Curve transition method between thick regions and thin regions of periodic longitudinal variable-thickness strip
CN101648210A (en) * 2009-08-28 2010-02-17 中铝洛阳铜业有限公司 Processing method for rolling magnesium alloy plate with low temperature, high speed and large processing amount
JP5740827B2 (en) * 2010-03-30 2015-07-01 Ｊｆｅスチール株式会社 Thick plate rolling method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
张丁非等: "镁合金板材轧制成型的研究进展", 《材料工程》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108941208A (en) * 2017-05-24 2018-12-07 宝山钢铁股份有限公司 A kind of roughing width control method of slab
CN112077142A (en) * 2020-08-05 2020-12-15 首钢京唐钢铁联合有限责任公司 Rolling method and device of 8CrV saw blade steel

Also Published As

Publication number Publication date
CN105414183B (en) 2018-06-26

Similar Documents

Publication Publication Date Title
CN108480415B (en) Online rolling thermoforming process for hot plate/belt and application of online rolling thermoforming process
CN101905246B (en) Automatic control method for dynamic variable specification welding seam of rolling mill
CN111889512B (en) Method for producing thin steel plate by single-stand rolling mill
WO2013123682A1 (en) Pre-control method of head and tail shapes of continuous casting slab for reducing the removed amount from the head and tail of hot-rolled intermediate slab
CN102825065B (en) Rolling method for steel plates of wide and thin specifications
WO2009036665A1 (en) Method for continuous casting, rolling intermediate and thin sheet
CN101168167A (en) Deformation magnesium alloy belt type rolling method
WO2015188421A1 (en) Long-length rolling method for t-shaped guide rail of elevator and production line therefor
KR20100054854A (en) Rolling equipment line for t-shaped steel
CN110076207B (en) Production method for reducing folding incidence of edge of wide plate
CN106311762B (en) Improve the load distribution method of hot rolled thin strip rolling stability
CN105414183A (en) Technology method for manufacturing wide sheet through magnesium alloy cast rolled plate
CN110656223B (en) Transversely-variable-thickness wide quenched and tempered steel plate and preparation method thereof
CN102962253A (en) 5-millimeter steel plate rolling process
CN1640568A (en) Marginal concurrent heating direct-rolling process for heavy-medium plate billet continuous casting-rolling mill set
CN202377260U (en) Aluminum plate belt hot continuous rolling machine set
CN105423113A (en) Determining method for shape and size of wide sheet blank prepared through magnesium alloy cast rolled plate
CN105057350B (en) A kind of stainless milling method of vehicle
CN103624088A (en) Method for eliminating transverse cracks on steel plate tail
CN109365527B (en) Rolling method of wide and thick steel plate with large spreading ratio
CN110560485A (en) Hot-rolled strip steel endless rolling intermediate billet connecting system and method
CN208357553U (en) The on-line continuous hot bending shape system and production line of hot plate/band
JP6172109B2 (en) Hot rolled steel sheet rolling method
EP2762241B1 (en) Hot slab shape control equipment and shape control method
CN105363781A (en) Rolling technological method for preparing wide thin plate billet through magnesium alloy cast-rolling plate

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant