CN113417406A - Beam structure and preparation method thereof - Google Patents
Beam structure and preparation method thereof Download PDFInfo
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- CN113417406A CN113417406A CN202110680242.XA CN202110680242A CN113417406A CN 113417406 A CN113417406 A CN 113417406A CN 202110680242 A CN202110680242 A CN 202110680242A CN 113417406 A CN113417406 A CN 113417406A
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- 238000002360 preparation method Methods 0.000 title claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 172
- 239000010959 steel Substances 0.000 claims abstract description 172
- 238000005260 corrosion Methods 0.000 claims abstract description 74
- 230000007797 corrosion Effects 0.000 claims abstract description 74
- 238000004519 manufacturing process Methods 0.000 claims abstract description 14
- 239000010936 titanium Substances 0.000 claims description 64
- 229910052719 titanium Inorganic materials 0.000 claims description 63
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 58
- 238000003466 welding Methods 0.000 claims description 36
- 238000000034 method Methods 0.000 claims description 19
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 10
- 239000000956 alloy Substances 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 238000000137 annealing Methods 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000010030 laminating Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 17
- 239000000758 substrate Substances 0.000 description 40
- 239000002131 composite material Substances 0.000 description 12
- 238000010438 heat treatment Methods 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 229910000746 Structural steel Inorganic materials 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 230000003187 abdominal effect Effects 0.000 description 3
- 238000005253 cladding Methods 0.000 description 3
- 238000007723 die pressing method Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 210000001015 abdomen Anatomy 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/64—Insulation or other protection; Elements or use of specified material therefor for making damp-proof; Protection against corrosion
- E04B1/642—Protecting metallic construction elements against corrosion
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
- E04C2003/0443—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section
- E04C2003/0452—H- or I-shaped
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
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- Electromagnetism (AREA)
- Rod-Shaped Construction Members (AREA)
- Arc Welding In General (AREA)
Abstract
The present application relates to a beam structure and a method of making the same. The beam structure includes: the flange plate comprises a second steel base layer and a second corrosion-resistant layer coated on one side surface of the second steel base layer; and one side of the first steel base layer of each web, which is far away from the first corrosion-resistant layer, is attached to and fixedly connected with the first steel base layer of the rest at least one web and the second steel base layer of the flange plate. This application so can avoid each steel basic unit direct contact atmosphere and corroded, has improved the anticorrosive performance of beam structure, simultaneously, can also reduce anticorrosive material's quantity, reduce cost.
Description
Technical Field
The application relates to the technical field of building material production, in particular to a beam structure and a preparation method thereof.
Background
The I-beam is widely applied to the field of buildings and the preparation of structural members, and the main I-beams in the current field comprise steel structure I-beams and titanium structure I-beams. The steel structure I-beam is most widely applied, but in certain specific environments such as island barracks construction, barracks constructed by the steel structure I-beam are poor in corrosion resistance and short in service life. The titanium structural I-beam has the advantages of good corrosion resistance, high strength, light weight and the like, but the price is higher.
Disclosure of Invention
In view of the above, there is a need to provide a beam structure and a method for manufacturing the same, which can overcome the above-mentioned disadvantages, and solve the problem that the beam structure in the prior art cannot achieve both low cost and corrosion resistance.
A beam structure comprises a flange plate and at least two webs, wherein each web comprises a first steel base layer and a first corrosion-resistant layer wrapping one side surface of the first steel base layer, and the flange plate comprises a second steel base layer and a second corrosion-resistant layer wrapping one side surface of the second steel base layer;
and one side of the first steel-based layer of each web, which is far away from the first corrosion-resistant layer, is attached to and fixedly connected with the first steel-based layer of the remaining at least one web and the second steel-based layer of the flange plate.
In one embodiment, the first and second corrosion-resistant layers each comprise a layer of titanium or titanium alloy material.
In one embodiment, the web comprises two, and the flanges comprise two, each web has a web region and flange regions at both ends of the web region in the first direction;
the two webs are oppositely arranged along a second direction perpendicular to the first direction, the first steel base layers of the web parts of the two webs are attached to each other, and the two flange areas of each web are bent towards the direction deviating from the other web;
two the flange plate is located two respectively the web is in the both sides on the first direction, and each the flange plate the second steel basic unit with two that correspond flange region first steel basic unit laminating and fixed connection mutually.
In one embodiment, the beam structure further comprises a titanium plate covering an end surface of the first steel base layer of each web and an end surface of the second steel base layer of each flange.
In addition, an embodiment of the present application further provides a method for manufacturing a beam structure, including the following steps:
s1: providing a flange plate and at least two web plates; each web comprises a first steel base layer and a first corrosion-resistant layer wrapping one side surface of the first steel base layer, and each flange plate comprises a second steel base layer and a second corrosion-resistant layer wrapping one side surface of the second steel base layer;
s2: and (3) attaching and welding and fixing one side of the first steel base layer of each web, which is far away from the first corrosion-resistant layer, with the first steel base layer of the rest at least one web and the second steel base layer of the flange plate.
In one embodiment, the step S2 specifically includes:
s21, attaching the first steel base layers of the web areas of the two webs and welding and fixing to obtain a first prefabricated member; the two flange areas of one web respectively correspond to the two flange areas of the other web one by one to form two groups of flange groups, and the two groups of flange groups are respectively positioned on two opposite sides of the first prefabricated member;
and S22, respectively attaching and welding the second steel base layers of the two flanges to the two flange groups.
In one embodiment, the step S22 specifically includes:
s221, respectively attaching the second steel base layers of the two flange plates to the two flange groups to obtain an I-shaped second prefabricated member;
s222, clamping and fixing the two flange areas of the flange plate and the flange group which are attached to each other in the second prefabricated member;
s223, welding and fixing the second steel base layer of the flange plate and the first steel base layer of the flange area which are attached to each other.
In one embodiment, after the step S2, the method further includes:
and S3, coating titanium plates on the end surface of the first steel base layer of each web plate and the end surface of the second steel base layer of each flange plate.
In one embodiment, after the step S2, the method further includes:
and S4, annealing.
Above-mentioned beam structure, first steel basic unit is by first corrosion resistant coating cladding, and second steel basic unit is by the cladding of second corrosion resistant coating, has avoided first steel basic unit and second steel basic unit and external atmosphere contact and has corroded, can improve beam structure's corrosion resistance. Simultaneously, one side of the first steel basic unit of each web that deviates from first corrosion resistant layer all with the first steel basic unit of other webs and the laminating of the second steel basic unit of flange board for binding face between the web and binding face between web and the flange board do not need the cladding anticorrosive coating just can isolated atmosphere, can reduce anticorrosive material's quantity, reduce cost.
Drawings
FIG. 1 is a schematic structural view of a beam structure according to an embodiment of the present application;
fig. 2 illustrates a method for fabricating a beam structure according to an embodiment of the present disclosure.
Description of reference numerals:
a beam structure 100; a web 110; a first steel base layer 111; a first corrosion resistant layer 112; the abdominal region 110A;
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
The beam structure provided in the present application will first be described in detail.
Referring to fig. 1, in an embodiment of the present application, a beam structure 100 is provided, which includes a web 110 and a flange 120, the web 110 includes at least two webs 110, each web 110 includes a first steel substrate 111 and a first corrosion resistant layer 112 covering a side surface of the first steel substrate 111, and the flange 120 includes a second steel substrate 121 and a second corrosion resistant layer 122 covering a side surface of the second steel substrate 121. The side of the first steel substrate 111 of each web 110 facing away from the first corrosion resistant layer 112 is attached and fixedly connected with the first steel substrate 111 of the remaining at least one web 110 and the second steel substrate 121 of the flange plate 120.
In the beam structure 100, the first steel substrate 111 is coated by the first corrosion-resistant layer 112, and the second steel substrate 121 is coated by the second corrosion-resistant layer 122, so that the first steel substrate 111 and the second steel substrate 121 are prevented from being corroded due to contact with the outside atmosphere, and the corrosion resistance of the beam structure 100 can be improved. Meanwhile, one side of the first steel base layer 111 of each web plate 110, which is away from the first corrosion-resistant layer 112, is attached to the first steel base layers 111 of the other web plates 110 and the second steel base layer 121 of the flange plate 120, so that the attaching surfaces between the web plates 110 and the flange plate 120 can be isolated from the atmosphere without being coated with corrosion-resistant layers, the using amount of corrosion-resistant materials can be reduced, and the cost is reduced.
Preferably, the flange 120 and the web 110 are connected by welding. With the welded connection, the beam structure 100 is more reliable in strength. Further, the edge plates 120 and the web plates 110 are welded by gas shielded welding, so that the welding efficiency of the gas shielded welding is high, the deformation is small, the energy consumption is low, and the low-cost welding of the beam structure 100 is realized.
In some embodiments, the first corrosion resistant layer 112 and the second corrosion resistant layer 122 each comprise a layer of titanium or titanium alloy material, such as a layer of TA2 titanium alloy material. Titanium and titanium alloy materials have good corrosion resistance, and are high in self-strength and light in weight, so that the overall strength of the beam structure 100 cannot be reduced.
Optionally, the web 110 and the flange 120 are both steel-titanium composite plates. The steel-titanium composite board comprises a steel base layer and a titanium composite layer compounded on one side of the steel base layer. The titanium composite layer in the existing steel-titanium composite plate is used as the first corrosion-resistant layer 112 of the web 110 and the second corrosion-resistant layer 122 of the flange plate 120 to form the beam structure 100, which helps to reduce the manufacturing cost and the development cost.
The first steel material layer and the second steel material layer may be a low-carbon structural steel material layer, a low-alloy structural steel material layer, or a stainless steel material layer, such as a Q235 steel material layer.
It is understood that the specific number of the flanges 120 and the webs 110 is not limited as long as the flanges 120 are greater than 1 and the webs 110 are greater than or equal to 2, and the cross-sectional shape of the beam structure 100 formed by connecting the flanges 120 and the webs 110 is also not limited. For example, a T-beam structure 100 is formed by the combination of two "7" shaped webs 110 and a "I" shaped flange 120.
In some embodiments, the web 110 includes two, and the flange plate 120 includes two, each web 110 having a web region 110A and flange regions 110B at both ends of the web region 110A in the first direction. The two webs 110 are oppositely arranged along a second direction perpendicular to the first direction, the first steel base layers 111 of the web regions 110A of the two webs 110 are attached to each other, and the two flange regions 110B of each web 110 are bent towards a direction away from the other web 110. The two flanges 120 are respectively located at two sides of the two webs 110 in the first direction, and the second steel base layer 121 of each flange 120 is attached and fixedly connected to the first steel base layers 111 of the two corresponding flange areas 110B.
In this embodiment, the two webs 110 and the two flanges 120 form a beam structure 100 with an i-shaped cross section, the web regions 110A of the two webs 110 form a waist portion of the beam structure 100 after being attached, the flange regions of one side wing in the first direction in the two webs 110 form a set of flange groups, the flange regions 110B on the other side in the first direction in the two webs 110 form another set of flange groups, one of the flange groups and the flanges 120 attached thereto form a wing portion of the beam structure 100, and the other set of flange groups and the flanges 120 attached thereto form another wing portion of the beam structure 100. At this time, the waist portion of the girder structure 100 and the wing portion of the girder structure 100 are formed of two steel base layers and two corrosion-resistant layers, and the structural strength and the structural rigidity of the girder structure 100 are significantly improved.
Alternatively, the first direction is an up-down direction in fig. 1, and the second direction is a left-right direction in fig. 1.
In some embodiments, the beam structure 100 further comprises titanium plates 130, the titanium plates 130 overlying the end surfaces of the first steel base layer 111 of each web 110 and the second steel base layer 121 of each platform 120.
The corrosion-resistant layer coated on one side surface of each steel-based layer is positioned on the side surface of the steel-based layer, and the surface of the steel-based layer perpendicular to the side surface is the end surface of the steel-based layer. It will be appreciated that the end faces of the steel substrate are exposed to the atmosphere since they are not coated with a corrosion resistant layer. In order to avoid corrosion of the end surfaces of the steel base layers, in this embodiment, the end surface of the first steel base layer 111 of each web 110 and the end surface of the second steel base layer 121 of each flange 120 are covered with titanium plates 130, and the titanium plates 130 isolate the end surfaces from the atmosphere, thereby avoiding corrosion of the end surfaces.
The titanium plate 130 may be a pure titanium plate 130 or a titanium alloy plate. Alternatively, the titanium plate 130 is bonded to each end face.
Specifically, in the embodiment, the same titanium plate 130 is covered on the end surface of the first steel base layer 111 and the end surface of the second steel base layer 121 which are adjacent to each other. At this time, the cutting of the titanium plate 130 can be reduced, and the connection strength between the first steel base layer 111 and the second steel base layer 121 can be improved.
It will be appreciated that the titanium plate 130 is cut to a shape that matches the shape of the end face.
Preferably, grooves are arranged on the end faces of the first steel base layer 111 and the second steel base layer 121, the depth of each groove is greater than or equal to the thickness of the titanium plate 130, the circumferential shape of each groove is matched with the shape of the titanium plate 130, and the titanium plate 130 is located in each groove. At this time, the titanium plate 130 can be accommodated by the processing groove to avoid the problem of the beam structure 100 being unattractive due to the protrusion of the titanium plate 130.
Further, the titanium plate 130 is adhesively connected to the groove. At this moment, the arrangement of the groove can avoid the exposure of the adhesive, and further provides the aesthetic degree.
In the beam structure 100 provided by the embodiment of the application, the first steel substrate 111 is coated by the first corrosion-resistant layer 112, and the second steel substrate 121 is coated by the second corrosion-resistant layer 122, so that the first steel substrate 111 and the second steel substrate 121 are prevented from being corroded due to contact with the outside atmosphere, and the corrosion resistance of the beam structure 100 can be improved. Meanwhile, one side of the first steel base layer 111 of each web plate 110, which is away from the first corrosion-resistant layer 112, is attached to the first steel base layers 111 of the other web plates 110 and the second steel base layer 121 of the flange plate 120, so that the attaching surfaces between the web plates 110 and the flange plate 120 can be isolated from the atmosphere without being coated with corrosion-resistant layers, the using amount of corrosion-resistant materials can be reduced, and the cost is reduced.
The following describes a method of making the beam structure 100 provided herein.
Referring to fig. 2, in an embodiment of the present application, a method for manufacturing a beam structure 100 is provided, which includes the following steps:
s1: providing a flange 120 and at least two webs 110; each of the webs 110 includes a first steel substrate 111 and a first corrosion-resistant layer 112 covering one side surface of the first steel substrate 111, and the flange 120 includes a second steel substrate 121 and a second corrosion-resistant layer 122 covering one side surface of the second steel substrate 121;
s2: and (3) attaching and welding the side, facing away from the first corrosion-resistant layer 112, of the first steel base layer 111 of each web 110 with the first steel base layer 111 of the remaining at least one web 110 and the second steel base layer 121 of the flange plate 120.
In this embodiment, the number and size of the flanges 120 and the web 110 required for the beam structure 100 can be cut from the steel-titanium composite plate, so that the web 110 has the first steel-based layer 111 and the first corrosion resistant layer 112, and the flanges 120 have the second steel-based layer 121 and the second corrosion resistant layer 122.
After cutting out the flanges 120 and the webs 110 with corresponding sizes and numbers, step S2 is performed, the side of the first steel substrate 111 of each web 110, which is away from the first corrosion resistant layer 112, is attached to the first steel substrate 111 of at least one other web 110 and the second steel substrate 121 of the flange 120, so as to ensure that the surface of the side, which is away from the first corrosion resistant layer, of the first steel substrate 111 of each web 110 is attached to the other first steel substrate 111 or the second steel substrate 121, thereby assembling the shape of the beam structure 100, and then welding each attachment surface to obtain the beam structure 100.
In the above method for manufacturing the beam structure 100, since the side of the first steel substrate 111 of each web 110 facing away from the first corrosion-resistant layer 112 is attached to the first steel substrate 111 of the other web 110 and the second steel substrate 121 of the flange 120, so that the attaching surfaces between the webs 110 and the attaching surfaces between the web 110 and the flange 120 can be isolated from the atmosphere without being coated with corrosion-resistant layers, the surface of the first steel substrate 111 facing the first corrosion-resistant layer 112 is isolated from the atmosphere by the first corrosion-resistant layer 112, and the surface of the second steel substrate 121 facing the second corrosion-resistant layer 122 is isolated from the atmosphere by the second corrosion-resistant layer 122, so that the corrosion of the steel substrates due to direct contact with the atmosphere can be avoided, the corrosion resistance of the beam structure 100 is improved, and at the same time, the amount of corrosion-resistant materials can be reduced, and the cost is reduced.
Wherein, gas shielded welding can be adopted during welding, and a multi-spot welding and integral welding strategy is adopted. The positioning connection of the binding surfaces is realized through multi-point welding, and then the complete connection of the binding surfaces is realized through integral welding, so that the connection strength is ensured. The flange plate 120 and the web plate 110 are welded by gas shielded welding, the welding efficiency of the gas shielded welding is high, the deformation is small, the energy consumption is low, and the low-cost welding of the beam structure 100 is realized.
The steel-based layer in the steel-titanium composite plate can be a low-carbon structural steel layer, a low-alloy structural steel layer or a stainless steel layer, such as a Q235 steel layer. The titanium composite layer may be a pure titanium material layer or a titanium alloy material layer, such as a TA2 titanium alloy material layer.
In some embodiments, step S1 specifically includes:
s11, cutting the flange plate 120 and the web plate blank with preset sizes; wherein the web slab has a web region 110A and flange regions 110B on opposite sides of the web region 110;
s12, the web blank is embossed such that the two flange regions 110B of the web blank are bent toward the side of the web region 110A having the first corrosion-resistant layer 112, in order to produce the web 110.
In this embodiment, a web blank of a corresponding size is first cut and then the web blank is subjected to a molding process to obtain a web 110 of a desired shape. In this embodiment, the web blank is bent during the molding process such that the flange region 110B is bent toward the side of the web region 110A having the first erosion resistant layer 112, thereby forming the U-shaped web 110.
Wherein, the web slab needs to be heated before the die pressing so as to improve the plasticity of the web slab in the die pressing stage. Preferably, the web slab is heated at 700 ℃ -800 ℃. The heating device may be an electric furnace. Preferably, the mold is also subjected to preheating treatment before molding, so that uneven internal and external deformation of the low-temperature material of the mold is avoided.
It is emphasized that during the moulding process, the first corrosion resistant layer 112 of the web slab is turned upwards and the first steel substrate layer 111 is turned downwards, so that the flange area 110B of the web slab is bent towards the side of the web area 110A having the first corrosion resistant layer 112.
Further, after the web 110 is obtained by die-pressing, excess blanks are cut off from the edges of the web 110, and the surface scale is removed. So as to facilitate the subsequent assembly welding.
In a further embodiment, step S2 includes:
s21, attaching, welding and fixing the first steel base layers 111 of the abdomen areas 110A of the two webs 110 to obtain a first prefabricated member; two flange areas 110B of one of the webs 110 respectively correspond to two flange areas 110B of the other web 110 one by one to form two sets of flange groups, and the two sets of flange groups are respectively located on two opposite sides of the first preform;
and S22, respectively attaching and welding the second steel base layers 121 of the two flange plates 120 to the two flange groups.
In this embodiment, two webs 110 are assembled into an i-shaped primary preform. Then, the flanges 120 are welded to the two sets of flanges of the first preform. Specifically, referring to fig. 1, the first steel substrate layer 111 of the web 110 at the left middle abdominal region 110A and the first steel substrate layer 111 of the web 110 at the right middle abdominal region 110A are attached and welded. Further, the welding position of the two first steel base layers 111 can be an upper attaching position and a lower attaching position.
Specifically, step S22 includes:
s221, respectively attaching the second steel base layers 121 of the two flange plates 120 to the two flange groups to obtain an I-shaped second prefabricated member;
s222, clamping and fixing the flange plate 120 and the two flange areas 110B of the flange group which are attached to each other in the second prefabricated member;
and S223, welding and fixing the second steel base layer 121 of the flange plate 120 and the first steel base layer 111 of the flange area 110B which are attached to each other.
At this moment, the two flanges 120 are accurately attached to the two flange groups of the first prefabricated member, and then the two flange areas 110B of the flange group and the flange 120 attached to each other in the second prefabricated member are clamped and fixed by using the tool fixture, so that the positions are maintained accurately, the displacement is avoided, and the subsequent accurate welding is facilitated.
In some embodiments, after step S2, the method further includes:
s3, coating a titanium plate 130 on the end surface of the first steel substrate 111 of each web 110 and the end surface of the second steel substrate 121 of each flange 120.
The corrosion-resistant layer coated on one side surface of each steel-based layer is positioned on the side surface of the steel-based layer, and the surface of the steel-based layer perpendicular to the side surface is the end surface of the steel-based layer. It will be appreciated that the end faces of the steel substrate are exposed to the atmosphere since they are not coated with a corrosion resistant layer. In order to avoid corrosion of the end surfaces of the steel base layers, in this embodiment, the end surface of the first steel base layer 111 of each web 110 and the end surface of the second steel base layer 121 of each flange 120 are covered with titanium plates 130, and the titanium plates 130 isolate the end surfaces from the atmosphere, thereby avoiding corrosion of the end surfaces.
Specifically, step S3 includes: a titanium plate 130 with a matched shape is bonded on the end face of the first steel base layer 111 of each web 110 and the end face of the second steel base layer 121 of each flange plate 120.
Specifically, the titanium plate 130 is cut to match the shape of each end surface, so as to ensure that the end surfaces of the steel-based layers can be completely coated, and avoid wasting materials. Furthermore, the same titanium plate 130 is covered on the end face of the first steel substrate 111 and the end face of the second steel substrate 121 which are adjacent to each other. At this time, the cutting of the titanium plate 130 can be reduced, and the connection strength between the first steel base layer 111 and the second steel base layer 121 can be improved.
Specifically, a groove matching the shape of the corresponding titanium plate 130 is milled on each end surface, and the groove is coated with glue to adhere the corresponding titanium plate 130 in the groove.
Preferably, a groove with a diameter of 1mm to 2mm is milled inwards on each end face, so that the milled groove is matched with the matched titanium plate 130 in size, the titanium plate 130 can be completely attached to the end face, and simultaneously, the milled groove can be flush with the surface of each anticorrosive coating, so that the overall continuity of the outer surface of the beam structure 100 is ensured. Wherein the depth of the groove is selected according to the thickness of the titanium plate 130. For example, when the thickness of the titanium plate 130 is 1mm, the depth of the groove is 1.1 mm.
The titanium plate 130 may be a pure titanium plate 130 or a titanium alloy plate.
In some embodiments, after step S2, the method further includes:
and S4, annealing.
In this embodiment, the beam blank is annealed before being clad with the titanium plate 130, and the post-weld residual stress of the beam structure 100 is reduced by a reasonable post-weld heat treatment, thereby improving the plasticity of the welded joint. The annealing treatment process can be as follows: heating the beam blank to 400-450 ℃, preserving heat for 30-60min, and then cooling. In actual operation, the beam blank can be heated to 430 ℃ and kept for 40min, and then cooled to room temperature in air.
It is understood that step S4 is performed before step S3 to avoid the annealing temperature affecting the viscosity of the adhesive, so that the titanium plate 130 is peeled off.
The whole production process will be described below by taking an example of producing an I-section beam having a waist height of 300mm, a leg width of 300mm, a waist width of 20mm, and a length of 2000mm (see FIG. 1).
1) Blanking: the left and right web slabs and the upper and lower flanges 120 are cut out to the corresponding dimensions as required for the beam structure 100. The left and right web plate blanks, the upper and lower edge plates 120 are made of steel-titanium composite plates, the thickness of a titanium composite layer TA2 in the steel-titanium composite plate is 0.5mm, and the thickness of a steel base layer Q235 is 9.5 mm. The left and right web plate blanks, the upper and lower edge plates 120 are respectively: the left and right web blanks are 2000mm long and 560mm wide, and the upper and lower marginal plates 120 are 2000mm long and 300mm wide.
2) Compression molding: and heating the left and right web blanks to 700 ℃ in an electric heating furnace, taking out and molding into the left and right webs 110. Before mould pressing, the titanium composite layer in the web plate blank faces upwards, and the steel base layer faces downwards.
3) And (6) surface treatment. Excess blank material at the edge of the web 110 is cut off to remove surface scale.
4) And (6) assembling. The first steel material layer of the web 110 area in the left web 110 is bonded and welded to the first steel material layer of the web 110 area in the right web 110. The second steel base layer 121 of the upper flange plate 120 is attached to the two flange areas 110B in the flange group located above, the second steel base layer 121 of the lower flange plate 120 is attached to the two flange areas 110B in the flange group located below, an i-beam structure 100 is assembled, and a tool clamp is used for clamping each flange plate 120 and each adjacent flange area 110B.
5) Welding: and welding all binding surfaces by adopting gas shielded welding, spot-welding and positioning all binding surfaces, and then carrying out subsequent welding to obtain the beam blank.
6) Annealing treatment: annealing the beam blank, wherein the annealing process comprises the following steps: and heating the beam blank to 400 ℃, preserving the heat for 30min, and then cooling the beam blank to room temperature.
7) Coating the titanium plate 130: according to the size of each end face of the beam blank, a titanium thin plate with the thickness of 1mm is adopted, and four first titanium plates 130 which are 2000mm long and 19mm wide and are rectangular are cut out, and two second titanium plates 130 which are 300mm high in waist, 300mm wide in legs and 20mm wide in waist and are I-shaped are cut out. And milling 1.2mm grooves on the end surfaces of the long-side steel base layers 111 on the two sides of the upper and lower marginal plates 120 of the beam blank by using a milling machine. Epoxy resin adhesive is smeared on the surfaces of the grooves, the four first titanium plates 130 are placed in the grooves of the end faces of the beam blank in the left and right directions, and the four first titanium plates are compacted by a tool. And (3) coating adhesive on the front and rear I-shaped section surfaces of the beam blank, adhering the second titanium plate 130 to the I-shaped surfaces, and then pressing the second titanium plate by using a tool to obtain the beam structure 100.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The beam structure is characterized by comprising a flange plate and at least two webs, wherein each web comprises a first steel base layer and a first corrosion-resistant layer coated on one side surface of the first steel base layer, and the flange plate comprises a second steel base layer and a second corrosion-resistant layer coated on one side surface of the second steel base layer;
and one side of the first steel-based layer of each web, which is far away from the first corrosion-resistant layer, is attached to and fixedly connected with the first steel-based layer of the remaining at least one web and the second steel-based layer of the flange plate.
2. The beam structure of claim 1, wherein the first and second corrosion resistant layers each comprise a layer of titanium or titanium alloy material.
3. The beam structure according to claim 2, wherein the web includes two, and the flange plate includes two, each of the webs having a web region and flange regions at both ends of the web region in the first direction;
the two webs are oppositely arranged along a second direction perpendicular to the first direction, the first steel base layers of the web parts of the two webs are attached to each other, and the two flange areas of each web are bent towards the direction deviating from the other web;
two the flange plate is located two respectively the web is in the both sides on the first direction, and each the flange plate the second steel basic unit with two that correspond flange region first steel basic unit laminating and fixed connection mutually.
4. The beam structure of claim 1 further comprising a titanium plate overlying an end surface of the first steel base layer of each of the webs and an end surface of the second steel base layer of each of the flanges.
5. A method for manufacturing a beam structure, comprising the steps of:
s1: providing a flange plate and at least two web plates; each web comprises a first steel base layer and a first corrosion-resistant layer wrapping one side surface of the first steel base layer, and each flange plate comprises a second steel base layer and a second corrosion-resistant layer wrapping one side surface of the second steel base layer;
s2: and (3) attaching and welding and fixing one side of the first steel base layer of each web, which is far away from the first corrosion-resistant layer, with the first steel base layer of the rest at least one web and the second steel base layer of the flange plate.
6. The preparation method according to claim 5, wherein the step S1 specifically comprises:
s11, cutting the edge plate and the web plate blank with preset sizes; wherein the web slab has a web region and flange regions on opposite sides of the web region;
s12, the web slab is embossed such that the two flange regions of the web slab are bent toward the side of the web region having the first corrosion-resistant layer, in order to obtain the web.
7. The method for manufacturing a beam structure according to claim 6, wherein the step S2 specifically includes:
s21, attaching the first steel base layers of the web areas of the two webs and welding and fixing to obtain a first prefabricated member; the two flange areas of one web respectively correspond to the two flange areas of the other web one by one to form two groups of flange groups, and the two groups of flange groups are respectively positioned on two opposite sides of the first prefabricated member;
and S22, respectively attaching and welding the second steel base layers of the two flanges to the two flange groups.
8. The method for manufacturing a beam structure according to claim 7, wherein the step S22 specifically includes:
s221, respectively attaching the second steel base layers of the two flange plates to the two flange groups to obtain an I-shaped second prefabricated member;
s222, clamping and fixing the two flange areas of the flange plate and the flange group which are attached to each other in the second prefabricated member;
s223, welding and fixing the second steel base layer of the flange plate and the first steel base layer of the flange area which are attached to each other.
9. The method for manufacturing a beam structure according to claim 5, further comprising, after the step S2:
and S3, coating titanium plates on the end surface of the first steel base layer of each web plate and the end surface of the second steel base layer of each flange plate.
10. The method for manufacturing a beam structure according to claim 9, further comprising, after the step S2:
and S4, annealing.
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