CN108393351A - A kind of compound LP steel plates and its production method - Google Patents
A kind of compound LP steel plates and its production method Download PDFInfo
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- CN108393351A CN108393351A CN201710068875.9A CN201710068875A CN108393351A CN 108393351 A CN108393351 A CN 108393351A CN 201710068875 A CN201710068875 A CN 201710068875A CN 108393351 A CN108393351 A CN 108393351A
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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
- 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
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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 present invention relates to a kind of compound LP steel plates and its production method, the compound LP steel plates roll forming after compound, section thickness consecutive variations along longitudinal direction, finished product shear strength >=300Mpa by carbon steel substrate and stainless steel compound plate.Production method includes：1) side surface of carbon steel substrate and stainless steel compound plate carries out milling processing respectively；2) it is stacked together carbon steel substrate is opposite with the milling face of stainless steel compound plate, contact surface surrounding, which is carried out welding, in a vacuum chamber is made rolling blank；3) compound LP steel plates are obtained after being rolled the rolling blank being welded on the heavy and medium plate mill with dynamic adjustment roll gap function.The compound LP steel plates that the present invention is produced use the compound plate with high surface corrosion resistance and aesthetics, and the substrate with high intensity and toughness is made, simple production process, the excellent in mechanical performance of finished product compound interface, shear strength reaches 300MPa or more, is a kind of ideal structural steel plate.
Description
Technical field
The present invention relates to metallurgical technology field more particularly to a kind of compound LP steel plates and its production methods.
Background technology
The Kind of Steels Used in Engineering Structures such as building, science of bridge building are important engineering material, with society and expanding economy, bridge
Steel not only requires load-carrying and shock resistance, and the requirement to corrosion resistance and aesthetics is also higher and higher；Therefore, engineering project at present
Common demands structural steel will not only have excellent intensity and toughness, good solderability, low yield tensile ratio to ensure big load
The break resistance of lower bridge, and to have good atmospheric corrosion resistance, to reach the use longevity exempted from application, improve bridge
The effect of life and aesthetics, therefore stainless steel clad plate is increasingly becoming the development trend of science of bridge building material.
LP (longitudinal variable-thickness) steel plate refers to steel plate with special longitudinal shape of the thickness along rolling direction consecutive variations,
It changes longitudinal thickness by continuously changing the opening degree of roll during the rolling process.Since longitudinal thickness-variable steel plate can basis
Load bearing situation changes its thickness, thus can optimize the design of the structure sections such as bridge, hull, building, can not only subtract
Few rolled steel dosage reduces welding times, and can improve operability by the uniform thicknessization of junction, such as omits backing plate and taper adds
Work etc..
Application No. is 200610092574.1 Chinese patents, disclose a kind of " with high-yield strength non-hardened and tempered steel
The steel plate of plate ", production can be used as the steel plate of bridge structure, and yield strength can reach 450~500MPa or so；But due to it
Containing higher Nb, Ti, Ni element, weight percent is respectively 0.06,0.03,0.8, not only increases ton steel cost, the company of returning
Casting production brings prodigious technical difficulty, is unfavorable for industrializing continuous casting greatly, and superfluous Ti can cause the drop of impact flexibility
It is low, it is most important that the corrosion resistance and aesthetics of this conventional steel sheet can not match in excellence or beauty with stainless steel clad plate.
Application No. is 201110347172.2 Chinese patent, " a kind of clad steel plate and its manufacturing method " is disclosed, it will
Need compound substrate, compound plate polishing, explosive then laid on compound plate, the impact force generated by explosive charge by compound plate and
Substantially carry out compound, the clad steel plate Percentage bound and intensity of the production technology of this Explosion composite production are relatively low, and make an uproar with height
Sound pollutes, and has been in the state being phased out at present.
Application No. is 201610180116.7 Chinese patent, disclose " a kind of martensitic stain less steel clad steel plate and its
Production method " is completed by steel billet assembly, heating, controlled rolling, heat treatment process route, and using double base ply rolling, i.e. upper layer and lower layer is
A516Gr70 carbon steels, intermediate two layers is 410S martensitic stain less steels, right after addition interleaving agent between two layers of martensitic stain less steel
Composite slab is carried out four sides welding edge sealing and is vacuumized using vacuum pump, has excellent obdurability and mechanical property；But it is symmetrical
The technique of assembly is relative complex, and is vacuum-treated.
Application No. is 201510162301.9 Chinese patent, " a kind of carbon steel and austenitic stainless steel clad steel are disclosed
Plate and its production method " also uses the technique similar with above-mentioned technique, and intermediate two layers is 316L austenitic stainless steels, two
Four sides welding edge sealing is carried out to composite slab after interleaving agent is added between layer austenitic stainless steel and is vacuumized using vacuum pump, equally
The technique of its symmetrical assembly is relative complex, and is vacuum-treated.
Application No. is the Chinese patent of CN201310227028.4, a kind of " transverse wedge-shaped rolled thickness-variable steel plate is disclosed
Production method ", including cross rolling：In transverse rolling stage end passes, set according to steel plate head and tail portion average thickness
Definite value carries out longitudinal variable cross-section rolling to steel plate；Longitudinal rolling；First, it in the axial rolling stage, is generated end to end according to the transverse rolling stage
Longitudinal variable-thickness value carries out lateral equal proportion wedge rolling；Then, it is determined using influence function method according to rolling procedure distribution
Roll gap adjustment amount and bending roller force setting value ensure that the transverse gage distribution of axial rolling passage meets the requirement of equal proportion wedge shape.Due to this
Method is to roll out lateral wedge-shaped steel plate in the extreme trace time setting roll gap parameter of cross rolling, necessarily leads to its thickness change range
Smaller, steel plate template is poor and correction can not be carried out on straightener causes useless plate rate to increase.
By being analyzed above it is found that being presently available for the LP steel plates or the following deficiency of compound LP steel plates presence of bridge construction：
1) corrosion resistance of steel plate, aesthetics are poor, cannot be satisfied bridge steel and build new needs；
2) composite plate substrate strength, toughness are relatively low, can not adapt to the requirement of big obdurability.
Invention content
The present invention provides a kind of compound LP steel plates and its production method, compound LP steel plates, which use, has the erosion of high surface corrosion-resistant
The compound plate of property and aesthetics, and the substrate with high intensity and toughness are made, simple production process, finished product compound interface
Excellent in mechanical performance, shear strength reach 300MPa or more, are a kind of ideal structural steel plates.
In order to achieve the above object, the present invention is realized using following technical scheme：
A kind of compound LP steel plates, the roll forming after compound by carbon steel substrate and stainless steel compound plate, section along longitudinal direction
Thickness consecutive variations, finished product shear strength >=300Mpa.
The carbon steel substrate uses common carbon structural steel, low-alloy structural steel or architectural engineering steel.
A kind of production method of compound LP steel plates, includes the following steps：
1) select the identical carbon steel substrate of length and width size and stainless steel compound plate, the thickness of the two can it is identical can not also
Together；One side surface of carbon steel substrate and stainless steel compound plate carries out milling processing respectively, makes its surface roughness Ra≤10um；
2) it is stacked together carbon steel substrate is opposite with the milling face of stainless steel compound plate, in a vacuum chamber by contact surface surrounding
It carries out welding and rolling blank is made, prevent contact surface in heating process from aoxidizing；
3) the rolling blank being welded is rolled on the heavy and medium plate mill with dynamic adjustment roll gap function, open rolling
Temperature control obtains compound LP steel plates at 1100~1200 DEG C, after rolling.
Compared with prior art, the beneficial effects of the invention are as follows：
1) compound LP steel plates use the compound plate with high surface corrosion resistance and aesthetics, and have high intensity and toughness
Substrate be made, be a kind of novel LP steel plates；
2) simple production process of compound LP steel plates, the excellent in mechanical performance of finished product compound interface, shear strength reach
300MPa or more is a kind of ideal structural steel plate.
Description of the drawings
Fig. 1 is the finished product structure schematic diagram of compound LP steel plates of the present invention.(by taking wedge-shaped LP clad steel plates as an example)
In figure：1. 2. stainless steel compound plate of carbon steel substrate
Specific implementation mode
The specific implementation mode of the present invention is described further below in conjunction with the accompanying drawings：
As shown in Figure 1, a kind of compound LP steel plates of the present invention, are rolled by carbon steel substrate 1 and stainless steel compound plate 2 after compound
Type is made, section thickness consecutive variations along longitudinal direction, finished product shear strength >=300Mpa.
The carbon steel substrate 1 is using common carbon structural steel, low-alloy structural steel or architectural engineering steel.
A kind of production method of compound LP steel plates, includes the following steps：
1) select the identical carbon steel substrate 1 of length and width size and stainless steel compound plate 2, the thickness of the two can it is identical can also
It is different；One side surface of carbon steel substrate 1 and stainless steel compound plate 2 carries out milling processing respectively, makes its surface roughness Ra≤10um；
2) it is stacked together carbon steel substrate 1 is opposite with the milling face of stainless steel compound plate 2, in a vacuum chamber by contact surface four
Rolling blank is made in Zhou Jinhang welding, prevents contact surface in heating process from aoxidizing；
3) the rolling blank being welded is rolled on the heavy and medium plate mill with dynamic adjustment roll gap function, open rolling
Temperature control obtains compound LP steel plates at 1100~1200 DEG C, after rolling.
Following embodiment is being implemented down based on the technical solution of the present invention, gives detailed embodiment and tool
The operating process of body, but protection scope of the present invention is not limited to following embodiments.Method therefor is such as without spy in following embodiments
It is conventional method not mentionlet alone bright.
【Embodiment 1】
In the present embodiment, stainless steel compound plate 2 uses 304 stainless steel steel billets, carbon steel substrate 1 to use Q345B steel billets.
One surface on a surface and Q345B steel billets to 304 stainless steel steel billets is utilized respectively milling machine and carries out at milling
Reason, milling rear surface roughness Ra≤10um.
The milling face of Q345B steel billets and 304 stainless steel steel billets is stacked together relatively, is sent into contact surface in vacuum chamber
Surrounding welded, to prevent in heating process contact surface to aoxidize.
Rolling wedge-shaped LP clad steel plates, start rolling temperature 1100 on the heavy plate mill with dynamic adjustment roll gap function
℃。
Finished product on inspection and examine, thin end thickness 20mm, thick end thickness 40mm, long 12m, shear strength >=320Mpa.
【Embodiment 2】
In the present embodiment, stainless steel compound plate 2 uses 316 stainless-steel sheets, carbon steel substrate 1 to use Q345GJ steel plates.
One surface on a surface and Q345GJ steel plates to 316 stainless-steel sheets is utilized respectively milling machine and carries out at milling
Reason, milling rear surface roughness Ra≤10um.
The milling face of Q345GJ steel plates and 316 stainless-steel sheets is stacked together relatively, being sent into vacuum chamber will contact
The surrounding in face is welded, to prevent contact surface in heating process from aoxidizing.
Rolling wedge-shaped LP clad steel plates, start rolling temperature 1200 on the heavy plate mill with dynamic adjustment roll gap function
℃。
Finished product on inspection and examine, thin end thickness 15mm, thick end thickness 30mm, long 20m, shear strength >=330Mpa.
【Embodiment 3】
In the present embodiment, stainless steel compound plate 2 uses 316L stainless-steel sheets, carbon steel substrate 1 to use Q370q steel plates.
One surface on a surface and Q370q steel plates to 316L stainless-steel sheets is utilized respectively milling machine and carries out at milling
Reason, milling rear surface roughness Ra≤9um.
The milling face of Q370q steel plates and 316L stainless-steel sheets is stacked together relatively, being sent into vacuum chamber will contact
The surrounding in face is welded, to prevent contact surface in heating process from aoxidizing.
Rolling wedge-shaped LP clad steel plates, start rolling temperature 1150 on the heavy plate mill with dynamic adjustment roll gap function
℃。
Finished product on inspection and examine, thin end thickness 30mm, thick end thickness 50mm, long 15m, shear strength >=310Mpa.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (3)
1. a kind of compound LP steel plates, which is characterized in that the roll forming after compound by carbon steel substrate and stainless steel compound plate, along vertical
To section thickness consecutive variations, finished product shear strength >=300Mpa.
2. a kind of compound LP steel plates according to claim 1, which is characterized in that the carbon steel substrate uses normal carbon knot
Structure steel, low-alloy structural steel or architectural engineering steel.
3. a kind of production method of compound LP steel plates as described in claim 1, which is characterized in that include the following steps：
1) the identical carbon steel substrate of length and width size and stainless steel compound plate, the thickness of the two is selected to can be the same or different；Carbon
One side surface of steel substrate and stainless steel compound plate carries out milling processing respectively, makes its surface roughness Ra≤10um；
2) it is stacked together carbon steel substrate is opposite with the milling face of stainless steel compound plate, in a vacuum chamber carries out contact surface surrounding
Rolling blank is made in welding, prevents contact surface in heating process from aoxidizing；
3) the rolling blank being welded is rolled on the heavy and medium plate mill with dynamic adjustment roll gap function, start rolling temperature
Control obtains compound LP steel plates at 1100~1200 DEG C, after rolling.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710068875.9A CN108393351A (en) | 2017-02-08 | 2017-02-08 | A kind of compound LP steel plates and its production method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710068875.9A CN108393351A (en) | 2017-02-08 | 2017-02-08 | A kind of compound LP steel plates and its production method |
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| Publication Number | Publication Date |
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| CN108393351A true CN108393351A (en) | 2018-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710068875.9A Pending CN108393351A (en) | 2017-02-08 | 2017-02-08 | A kind of compound LP steel plates and its production method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113396021A (en) * | 2019-01-21 | 2021-09-14 | 杰富意钢铁株式会社 | Steel ingot rolling method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1850375A (en) * | 2006-04-29 | 2006-10-25 | 东北大学 | Method for continuously rolling variable-thickness steel plate |
| CN201137811Y (en) * | 2007-07-30 | 2008-10-22 | 吴国强 | Wedge shape composite steel plate for making knife |
| CN103611727A (en) * | 2013-11-19 | 2014-03-05 | 武汉钢铁(集团)公司 | Production method of composite variable-cross-section metal plate |
| CN104769142A (en) * | 2012-11-08 | 2015-07-08 | 法国肯联铝业 | Method for manufacturing a structural element having a variable thickness for aircraft production |
| CN105073287A (en) * | 2013-02-08 | 2015-11-18 | 首要金属科技有限责任公司 | Method of manufacturing a beam |
-
2017
- 2017-02-08 CN CN201710068875.9A patent/CN108393351A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1850375A (en) * | 2006-04-29 | 2006-10-25 | 东北大学 | Method for continuously rolling variable-thickness steel plate |
| CN201137811Y (en) * | 2007-07-30 | 2008-10-22 | 吴国强 | Wedge shape composite steel plate for making knife |
| CN104769142A (en) * | 2012-11-08 | 2015-07-08 | 法国肯联铝业 | Method for manufacturing a structural element having a variable thickness for aircraft production |
| CN105073287A (en) * | 2013-02-08 | 2015-11-18 | 首要金属科技有限责任公司 | Method of manufacturing a beam |
| CN103611727A (en) * | 2013-11-19 | 2014-03-05 | 武汉钢铁(集团)公司 | Production method of composite variable-cross-section metal plate |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113396021A (en) * | 2019-01-21 | 2021-09-14 | 杰富意钢铁株式会社 | Steel ingot rolling method |
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Application publication date: 20180814 |
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