CN106540961B - A kind of group blank technology of vacuum complex technique production super-thick steel plate - Google Patents
A kind of group blank technology of vacuum complex technique production super-thick steel plate Download PDFInfo
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- CN106540961B CN106540961B CN201610965628.4A CN201610965628A CN106540961B CN 106540961 B CN106540961 B CN 106540961B CN 201610965628 A CN201610965628 A CN 201610965628A CN 106540961 B CN106540961 B CN 106540961B
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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
- B21B47/00—Auxiliary arrangements, devices or methods in connection with rolling of multi-layer sheets of metal
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The present invention discloses a kind of group blank technology of vacuum complex technique production super-thick steel plate.Reduce dependence of the vacuum rolling clad steel plate to surface smoothness, roughness；Compound interface binding ability and intensity are improved, plate property and compound interface stability are improved；Lower compression ratio, production more think gauge special heavy plate, flaw detection qualification rate can used to effectively improve.
Description
Technical field
The invention belongs to metal material processing technical fields, are related specifically to a kind of vacuum complex technique production super-thick steel plate
Group blank technology.
Background technology
In recent years, as Super High, large-span steel construction project are continuously increased, the energy, traffic, building, shipbuilding,
The industries such as machine-building increasingly increase the demand of super-thick steel plate, also simultaneously to the performance requirement of super-thick steel plate, thickness requirements
It improves, due to being that 150mm or more thickness steel plate demands are more and more.As steel looks forward to the fast development of manufacturing technology, equipment, hot rolling
Steel plate has much broken through original finished product thickness range, has gradually replaced as cast condition and forging product, it is even more to reach 400mm.
Hot-rolling method produces super-thick steel plate, and for tradition mainly using cast slab, electroslag remelting steel ingot, polygonal ingot as raw material, minority is continuous casting billet,
It now has been developed and obtains composite steel billet by way of vacuum welding as raw material using two or multigroup blank.Using the compound skill of vacuum
Art production super-thick steel plate has the characteristics that production cost is low, simple for process, lumber recovery is high.For being produced using vacuum composite method
Super-thick steel plate generally requires blank carrying out surface processing, reaches certain finish, ensures that dry tack free, cleaning, assembly are laggard
Enter vacuum chamber and completes blank welding.
As Jinan Iron ＆ Steel Group Corporation apply entitled " a kind of process producing super-thick steel plate " patent, specially
For profit application No. is 200810249817.7, Publication No. CN 101363101A provide a kind of method producing super-thick steel plate：It will
Then two boards base is heated, is rolled at one block of new slab by vacuumizing simultaneously soldering by cutting, straight and even, cleaning,
To solve the problems, such as large-scale molding center portion segregation and loose.
The patent of entitled " a kind of preparation method of special thick alloy-steel plate " of Northeastern University's application, number of patent application are
201310707559.3 Publication No. CN 103692166A provide a kind of preparation method of special thick alloy-steel plate：By two pieces
The alloy steel continuous casting slab that length and width dimensions match is surface-treated, and assembly, welding are then carried out, and obtains special thick alloy-steel plate
Blank.
The patent of entitled " a kind of method of producing super-thick plate by packrolling welding process " of University of Science ＆ Technology, Beijing's application, patent application
Number be 201010283917.9, Publication No. CN 102009332A provide a kind of side of producing super-thick plate by packrolling welding process
Method has main steps that：Continuous casting billet is cut, briquet removing surface, and with size briquet to just stacked, faying face surrounding is welded after fastening
It connects, bonding gap is vacuum-treated, sealing and rolling.
But the above prior art has the following problems：Since milling machine machining accuracy limits when blank surface is processed, Wu Fabao
Card machined surface fits closely, while being possible to generate closed hole again, causes to roll rear steel plate inspection and does not conform to.In addition, planer or milling
The processing method of bed can not accurately control blank surface roughness, and suitable roughness is the necessary item of the qualified steel plate of production
Part.
Invention content
In view of the foregoing drawbacks, it is contacted between a kind of improvement composite blank contact surface of technical problems to be solved by the invention offer
State improves the group blank technology of clad steel plate binding performance.Purpose is the contact condition improved between composite blank contact surface, is carried
The bond strength in high Rolling compund face, this method production super-thick steel plate internal soundness stability be obviously improved, disclosure satisfy that compared with
The requirement of small rolling reduction, and it is easy to operate.
In order to achieve the above objectives, present invention employs the following technical solutions：
A kind of group blank technology of vacuum complex technique production super-thick steel plate, it is characterised in that the method includes following steps
Suddenly：
(1) choose that size is comparable to wait for assembly blank, C%≤0.22% in blank；
(2) blank surface to be contacted is processed, removes the rusty scale and oxide layer of contacting surface waiting；
(3) degreasing and purge are carried out to processing rear surface；
(4) make in undermost blank to be in horizontal positioned, by the uniform spreading of iron powder in contacting surface waiting, spreading thickness model
It is trapped among 0.10~1mm；Iron powder purity is 99.9% or more；Granularity is in the mesh of 200 mesh~10000；
(5) step (2) will be passed through, (3) treated upper layer blank and process step (4) treated blank are to just stacking
Together, step (4) and (5) are repeated if using 3 layers and the above number of plies blank assembly；
(6) sealing welding is carried out after the blank after assembly being extracted vacuum；
(7) the combination blank after vacuum processing is heated to 1150~1280 DEG C of heat preservations, is rolled at 850~1250 DEG C
System, obtains target thickness super-thick steel plate.
Different meshes iron powder can mix in proportion in step (4)；
Blank is continuous casting billet or slab in the step (1), and slab is the intermediate base obtained by processing such as forging, rollings
Material or finished steel plate；
It is polished blank surface by machining modes such as planer or milling machines in the step (2)；
The present invention select the reason of above scope of application and technological parameter be because：
Transition material of the present invention be iron powder, when as C content 0.22% with the compound transition material of lower steel plate
When material, to transition region diffusion reaction occurs for the elements such as C, Si, Mn in heating, the operation of rolling in blank, is formed and matrix phase
Close chemical composition, and then undergone phase transition in follow-up cooling procedure, lower C content disclosure satisfy that be formed between upper and lower composite surface
Almost the same institutional framework, mechanical property etc. with matrix, are conducive to the stability of composite surface and the uniformity of plate property；
The assembly material of the present invention can select continuous casting billet, the slab by processing can also be selected, this is because this hair
The bright requirement that can adapt to different blank assemblies, realizes the Rolling Production of quality plate；
Iron powder purity of the present invention reaches 99.9% or more, in order to effectively control transition material ingredient and roll rear transition
Layer performance, higher purity can ensure the stability of the self performance of iron powder, be conducive to accurately control iron powder and subsequently using
Effect in the process；
Iron powder of the present invention chooses the mesh section granularity of 200 mesh~10000, this is because larger its performance of granularity iron powder tends to be general
Logical steel material (fusing point is higher), heating and the operation of rolling will not form molten condition at compound interface but retain solid-state
Grain causes steel plate there are graininess interlayer and makes Laminated steel, flaw detection discord；Cross small grain size iron powder (when Nano grade) due to
Its surface area is larger, and performance is active, and normal temperature state can react with oxygen gas and water etc., and spontaneous combustion even can occur under illumination,
Requirement of the big production to its stability, safety cannot be met；Particle size range selected by this patent has metastable performance, is heated to
Certain temperature under conditions of certain pressure its can form molten condition, can be managed under varigrained combination condition
The metallic state thought occurs physical reactions with progress and the upper and lower two blocks of composition metals of the follow-up operation of rolling, carries out chemistry member
The diffusion of element, and a complete entirety is formed with upper and lower composition metal in subsequent cooling procedure；It can be formed using it
The characteristic of molten condition, foreign matter that can be to process in metal surface remaining can realize effective package, it is right to reduce its
The influence of bond strength；The grain size intervals of iron powder are conducive to be filled into groove, the hole etc. for being machined in metal surface formation
Position is effectively improved the unevenness of steel plate, improves combined efficiency；The smaller grain size intervals of iron powder are conducive to subtract under vacuum
Few possible residual air；
The present invention chooses granular iron powder, style characteristic can be utilized to increase its contact area in surface of steel plate, improve friction
Power, and then the relative stability of operation of rolling steel plate is improved, be conducive to produce excellent composite performance under the conditions of compared with low compression ratio
Steel plate；
For iron powder spreading thickness range between 0.15~1mm, thicker transition zone is unfavorable for welding process in the present invention
The acquisition of stability and follow-up welding process fusion penetration；Relatively thin thickness is unfavorable for ensureing the uniformity of iron powder, is unable to reach acquisition
The quantity of the required iron powder of ideal performance；The thickness range of 0.15~1mm advantageously forms certain thickness transition zone, makes it
Transition zone is formed in composite surface evenly, is to meet the iron powder optimum thickness range realized and improve the requirement of composite surface bond strength.
Super-thick steel plate produced by the invention has the advantages that：1, vacuum rolling clad steel plate is reduced to any surface finish
The dependence of degree, roughness；2, compound interface binding ability and intensity are improved, plate property and compound interface stability are improved；3、
Lower compression ratio, production more think gauge special heavy plate, flaw detection qualification rate can used to effectively improve.
Specific implementation mode
With reference to embodiment, the present invention is described in detail.
The actual process parameter such as Tables 1 and 2 of the present invention, object performance inspection result of the invention such as table 3.
1 embodiment Steel Plate Information of table
| Number | Steel grade | C% | Blank source | The blank number of plies | Assembly thickness | Rolling thickness | Compression ratio |
| Embodiment 1 | Q235B | 0.05 | Continuous casting billet | 2 | 590mm | 400mm | 1.5：1 |
| Embodiment 2 | Q345B | 0.22 | Continuous casting billet | 2 | 485mm | 300mm | 1.62：1 |
| Embodiment 3 | Q345D | 0.18 | Slab | 3 | 580mm | 400mm | 1.93：1 |
| Embodiment 4 | Q345E | 0.16 | Slab | 2 | 590mm | 180mm | 3.28：1 |
| Embodiment 5 | S355JR | 0.15 | Continuous casting billet | 3 | 880mm | 400mm | 2.2：1 |
| Comparative example 1 | Q235B | 0.05 | Continuous casting billet | 2 | 590mm | 400mm | 1.5：1 |
| Comparative example 2 | Q345E | 0.16 | Slab | 2 | 590mm | 180mm | 3.28：1 |
2 technological parameter of the embodiment of the present invention of table
| Number | 1 size of iron powder | 2 size of iron powder | Mixed proportion | Iron powder thickness |
| Embodiment 1 | 800 mesh | 10000 mesh | 1：2 | 0.20mm |
| Embodiment 2 | 500 mesh | 2000 mesh | 2：1 | 0.35mm |
| Embodiment 3 | 200 mesh | 1000 mesh | 1：1 | 0.15mm |
| Embodiment 4 | 400 mesh | - | - | 1.00mm |
| Embodiment 5 | 300 mesh | 1500 mesh | 3：1 | 0.60mm |
3 present invention of table inspection result in kind
Claims (2)
1. a kind of group blank technology of vacuum complex technique production super-thick steel plate, it is characterised in that the described method comprises the following steps：
(1) choose that size is comparable to wait for assembly blank, mass percentage≤0.22% of C in blank；
(2) blank surface to be contacted is processed, is polished blank surface, is gone by planer or milling machine machining mode
Except the rusty scale and oxide layer of contacting surface waiting；
(3) degreasing and purge are carried out to processing rear surface；
(4) make in undermost blank in being horizontally arranged, by the uniform spreading of iron powder in contacting surface waiting, spreading thickness range exists
0.10~1mm；Iron powder purity is 99.9% or more；Granularity is in the mesh of 200 mesh~10000；
(5) will pass through step (2), (3) treated upper layer blank with by step (4) treated blank to just overlaying one
It rises, step (4) and (5) is repeated if using 3 layers and the above number of plies blank assembly；
(6) sealing welding is carried out after the blank after assembly being extracted vacuum；
(7) by vacuum welding treated combination blank be heated to 1150~1280 DEG C heat preservation, rolled at 850~1250 DEG C
System, obtains target thickness super-thick steel plate.
2. a kind of group blank technology of vacuum complex technique production super-thick steel plate according to claim 1, it is characterised in that：Institute
It is continuous casting billet or slab to state blank in step (1), and slab is intermediate blank or finished steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610965628.4A CN106540961B (en) | 2016-10-28 | 2016-10-28 | A kind of group blank technology of vacuum complex technique production super-thick steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610965628.4A CN106540961B (en) | 2016-10-28 | 2016-10-28 | A kind of group blank technology of vacuum complex technique production super-thick steel plate |
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| Publication Number | Publication Date |
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| CN106540961A CN106540961A (en) | 2017-03-29 |
| CN106540961B true CN106540961B (en) | 2018-08-14 |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61140393A (en) * | 1984-12-14 | 1986-06-27 | Sumitomo Metal Ind Ltd | Manufacture of titanium clad steel |
| JPS626783A (en) * | 1985-07-02 | 1987-01-13 | Sumitomo Metal Ind Ltd | Production of titanium clad steel sheet by rolling |
| JPH01224181A (en) * | 1988-03-01 | 1989-09-07 | Kobe Steel Ltd | Manufacture of ti clad steel plate |
| CN1590002A (en) * | 2003-12-31 | 2005-03-09 | 李晓杰 | Hot rolling composite method of cladding material |
| CN101439348A (en) * | 2008-12-29 | 2009-05-27 | 济南钢铁股份有限公司 | Technological process for producing super-thick plate |
| CN101773931B (en) * | 2009-12-30 | 2011-07-13 | 东北大学 | Method for rolling special thick board by means of vacuum compositing |
| CN102179405B (en) * | 2011-01-27 | 2013-01-02 | 东北大学 | Method for preventing interface of stainless steel compound plate subjected to vacuum composite rolling from being oxidized |
| CN104741410B (en) * | 2015-03-30 | 2016-10-05 | 河北钢铁股份有限公司 | A kind of manufacture method of super-thick steel plate |
| CN105251971B (en) * | 2015-10-10 | 2017-10-20 | 燕山大学 | A kind of method hot rolling plate base process interlayer vacuum coating method |
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