阅读说明：本技术 一种异形包覆型材 (Special-shaped cladding profile ) 是由 刘嘉勋 刘洪成 于 2021-10-18 设计创作，主要内容包括：本发明公开了一种异形包覆型材,包括：底板,所述底板为第一复合材；主体部,所述主体部包括至少一块第二复合材,所述第二复合材焊接于所述第一复合材上,形成第一焊缝；所述第一复合材和所述第二复合材,均包括芯材和包覆材,所述包覆材为不锈钢材料制成并且包覆所述芯材,所述芯材为与所述包覆材不同的材料,所述第一焊缝的深度小于所述包覆材的厚度。因此,本发明的不锈钢复合型材既防锈,成本也低,而且结构强度高,适于广泛应用,尤其适于室外应用。(The invention discloses a special-shaped coating profile, which comprises: the bottom plate is made of a first composite material; a main body portion including at least one piece of a second composite material welded to the first composite material to form a first weld; the first composite material and the second composite material both comprise a core material and a coating material, the coating material is made of stainless steel materials and coats the core material, the core material is made of a material different from the coating material, and the depth of the first welding line is smaller than the thickness of the coating material. Therefore, the stainless steel composite section bar has the advantages of rust prevention, low cost and high structural strength, and is suitable for wide application, especially outdoor application.)

1. A profiled cladding profile, comprising:

a first composite comprising a first core and a first clad material, the first clad material covering the first core and having a different material;

a second composite comprising a second core material and a second clad material, the second clad material covering the second core material and being a different material, the second clad material being the same material as the first clad material;

the second composite is welded to the first composite to form a weld seam within the first and second wraps;

the depth of the weld is less than the thickness of the first or second clad material.

2. A shaped cover profile according to claim 1, wherein the weld is the material that welds the cover.

3. A shaped cover profile according to claim 1, wherein the weld seam has a higher tensile strength of the solder than the tensile strength of the solder required to weld the cover.

4. The profiled cladding section as defined in claim 1 wherein said first composite material forms a bottom portion of said profiled cladding section and a plurality of said second composite materials together form a body portion of said profiled cladding section;

the welding seams comprise a first welding seam and a second welding seam, the first welding seam is formed at the joint of two adjacent second composite materials by welding, and the welding depth of the first welding seam is smaller than the thickness of the second clad material; and the joint of the first composite material and the second composite material is welded to form the second welding line, and the welding depth of the second welding line is smaller than the thicknesses of the first cladding material and the second cladding material.

5. The profiled cladding section of claim 1, wherein the first core material is integrated with the first cladding material by a hot rolling process; the second core material and the second clad material are integrated through a hot rolling process.

6. The special-shaped cladding profile as claimed in claim 4, wherein the main body part comprises two wing plates and a web plate, the two wing plates and the web plate are both made of the second composite material, the two wing plates are parallel to each other, and two ends of the web plate are respectively and vertically connected to the central line positions of the two wing plates so as to jointly splice the H-shaped main body part.

7. The profiled cladding profile of claim 6, wherein the misalignment of the flanges with the web is no more than 1 mm.

8. A profiled cladding section as claimed in claim 1 wherein the first composite material and the second composite material are both stainless steel composite sheets.

Technical Field

The invention relates to a special-shaped cladding profile, and belongs to the technical field of metal manufacturing.

Background

Stainless steel composite materials are generally made by using stainless steel as a cladding material, plain carbon steel or common low alloy steel as a base material and by a metallurgical bonding mode. The composite material has the advantages of corrosion resistance, rust resistance and high plasticity and low cost of common steel, and has the price advantage which is incomparable with the pure stainless steel with the same specification, so the composite material is more and more highly valued by people. The stainless steel composite plate and the stainless steel composite pipe are two typical products in the stainless steel composite material, and at present, the two products are widely applied to engineering. In recent years, some other types of stainless steel composite materials are produced as well, because the stainless steel composite materials have incomparable cost performance compared with common steel materials and all stainless steel materials.

There are two main methods for the industrial production of stainless steel composite plates: explosive cladding and hot rolling cladding. The explosion cladding is that the stainless steel plate is overlapped on the carbon steel substrate, and the stainless steel plate and the carbon steel substrate are separated by a certain distance by a cushion. The explosive is spread on the stainless steel plate, and the energy of the explosive explosion makes the stainless steel plate impact the carbon steel substrate at high speed to generate high temperature and high pressure so as to realize solid-phase welding of the interface of the two materials. The hot rolling composite is formed by rolling a carbon steel substrate and a stainless steel plate in a physically pure state under a high vacuum condition. The two metals diffuse during rolling to achieve complete metallurgical bonding.

At present, in chinese invention patent No. CN201910485098.7 of the present applicant, a manufacturing method of hot-rolled clad steel and hot-rolled clad steel are disclosed, in which the dimensions of a clad pipe and a core material are designed so that the inner diameter of the clad pipe is smaller than the outer diameter of the core material, and then the clad pipe is heated and combined with the core material, thereby realizing the press-fitting of the clad pipe and the core material, and the operation is convenient, and by tightly combining the clad pipe and the core material all the time in the rolling process of the heated composite billet, the occurrence of cracks at the interface of the clad pipe and the core material is avoided, thereby obtaining qualified hot-rolled clad steel.

However, the above-mentioned manufacturing method is only suitable for manufacturing hot rolled bars or hot rolled sections of various shapes, and composite steel sections of irregular shapes cannot be directly manufactured.

Disclosure of Invention

The invention aims to provide a special-shaped coating profile.

In order to achieve the technical purpose, the invention adopts the following technical scheme:

a profiled cladding profile comprising:

a first composite comprising a first core and a first clad material, the first clad material covering the first core and having a different material;

a second composite comprising a second core material and a second clad material, the second clad material covering the second core material and being a different material, the second clad material being the same material as the first clad material;

the second composite is welded to the first composite to form a weld seam within the first and second wraps;

the depth of the weld is less than the thickness of the first or second clad material.

Preferably, the welding seam is a material for welding the cladding material.

Preferably, the tensile strength of the deposited metal of the welding flux of the welding seam is higher than that of the welding flux required for welding the coating material.

Preferably, the first composite material forms the bottom of the special-shaped cladding profile, and a plurality of second composite materials form the main body of the special-shaped cladding profile;

the welding seams comprise a first welding seam and a second welding seam, the first welding seam is formed at the joint of two adjacent second composite materials by welding, and the welding depth of the first welding seam is smaller than the thickness of the second clad material; and the joint of the first composite material and the second composite material is welded to form the second welding line, and the welding depth of the second welding line is smaller than the thicknesses of the first cladding material and the second cladding material.

Wherein preferably, the first core material and the first clad material are integrated through a hot rolling process; the second core material and the second clad material are integrated through a hot rolling process.

Preferably, the main body portion comprises two wing plates and a web plate, the two wing plates and the web plate are made of the second composite material, the two wing plates are parallel to each other, and two ends of the web plate are respectively and vertically connected to the central line positions of the two wing plates to jointly splice the H-shaped main body portion.

Preferably, the misalignment dimension between the wing plate and the web plate does not exceed 1 mm.

Preferably, the first composite material and the second composite material are stainless steel composite plates.

The invention has the following technical effects:

the special-shaped coating section provided by the technical scheme of the invention solves the problems of low cost and rust prevention of carbon steel; the technical contradiction that the cost of stainless steel is too high. Therefore, the stainless steel composite section provided by the invention is rust-proof, low in cost and high in structural strength, solves the technical problem that the coated section obtained by a hot rolling process cannot be a special-shaped section, and is suitable for wide application, especially outdoor application.

Drawings

Fig. 1A is a schematic structural diagram of a special-shaped clad profile according to an embodiment of the present invention;

FIG. 1B is a partial cross-sectional view of portion B of FIG. 1A;

fig. 2 is a manufacturing flow chart of a special-shaped coating profile according to an embodiment of the present invention.

Detailed Description

The technical contents of the invention are described in detail below with reference to the accompanying drawings and specific embodiments.

Generally, a clad material obtained by cladding one metal material (surface layer, clad material) on another metal material (core material) by a process such as hot rolling, press molding, etc. is limited only to a plate, a pipe, etc. and cannot be a profile (for example, the contour line is an irregular shape). The invention utilizes the cladding plate or the pipe and the like to obtain the special-shaped cladding section by welding, and ensures that the cladding material on the outer surface is not penetrated in the welding process, thereby breaking through the process limitation and obtaining various special-shaped sections. The material advantage of the coating profile is utilized, and the processing cost of the special-shaped profile is reduced. An I-shaped steel material made of stainless steel coated with carbon steel will be described below as an example.

Referring to fig. 1A, a special-shaped clad profile provided in an embodiment of the present invention includes: the special-shaped coating profile comprises a first composite material 1 and a second composite material 2, wherein the first composite material 1 forms a bottom plate of the special-shaped coating profile, and a plurality of second composite materials 2 jointly form a main body part of the special-shaped coating profile. The first composite material 1 and the second composite material 2 both adopt various carbon steels as core materials, the proportion of stainless steel clad materials is reduced, the overall cost of products is effectively reduced, and various grades of stainless steel and bidirectional stainless steel are used as the clad materials, so that the anticorrosion effect is well achieved. It should be noted that the present invention is not limited to the composite plate material of carbon steel and stainless steel, and the composite profile is suitable for welding process as long as the bottom plate and the main body part are both composite profiles, and the composite profiles have the same coating material and are located on the outer surface of the whole composite profile. The present invention is not limited to the composite sheet material, and may be in other shapes such as a composite tube material (a covering material covers the entire tubular core material). For clarity of description only, and for ease of understanding, only the composite board will be described below.

The stainless steel composite plate is formed by heating the cladding material and then pressing the cladding material and the core material together to form a composite blank, and finally, heating the composite blank to a certain temperature and then rolling the composite blank. Based on the special shape of the product, the stainless steel clad material can not be rolled after the carbon steel core material is prefabricated, so that the stainless steel clad material is rolled after the stainless steel clad material is split into a plurality of components by the stainless steel composite sectional material, and each component is welded and formed by a special welding method.

Referring to fig. 1B, in the present embodiment, the first composite material 1 includes a first core material 101 and a first clad material 102, and the second composite material 2 includes a second core material 103 and a second clad material 104. In the present embodiment, the first core material 101 and the second core material 103 are each made of metal carbon steel, and the first clad material 102 and the second clad material 104 are each made of stainless steel pipe. Meanwhile, referring to fig. 1, during specific welding, the joints of the second composite materials 2 are welded to form a first weld seam 3, and the joints of the first composite material 1 and the second composite material 2 are welded to form a second weld seam 4.

It is understood that the stainless steel material has good corrosion resistance and is not easy to rust, but has high cost; the easy oxidation of metal carbon steel material rusts, but the cost is lower, in this embodiment, sets up the difficult rusty structural style of cladding material through the outside at the core of cheap and easy rust, simultaneously, when the welding for the welding seam does not weld through the cladding material, makes the core contactless oxygen, and then under the prerequisite of guaranteeing corrosion resistance, can practice thrift the manufacturing cost of stainless steel composite sectional material.

In the present embodiment, specifically, the bottom plate is a first composite material 1, in the present embodiment, the first composite material 1 is a stainless steel composite plate material, the bottom plate 1 has a rectangular shape, four connection holes 11, preferably bolt holes, are separately formed at four corners of the bottom plate 1, and the bolt holes 11 are used for mounting bolt connecting members 12 so as to be connectable to other members. In other embodiments, the number and location of the connection holes 11 may be selected as desired.

The main part includes polylith second combined material 2, and in this embodiment, second combined material 2 is stainless steel composite board, and polylith second stainless steel composite board's size and specification can be the same also can be different, and this polylith second stainless steel composite board splices into each other and sets for the shape, then passes through the setting for flux welded fastening with arbitrary two adjacent second stainless steel composite board's concatenation department to form first welding seam 3, thereby weld the main part of setting for the shape with polylith second stainless steel composite board. Specifically, in this embodiment, polylith second stainless steel composite board includes two pterygoid lamina 21 and a web 22, and two pterygoid lamina 21 are the rectangle shape and are parallel to each other, and web 22 is the middle line position of rectangle shape and web 22's both ends difference vertical connection in two pterygoid lamina 21, and pterygoid lamina 21 and web 22's unfitness of butt joint do not exceed 1mm to splice into H type main part jointly. Considering that the stainless steel composite member needs to meet the mechanical property of the member and also needs to ensure the corrosion resistance of the cladding material contacting with corrosive media, when assembling welded parts, the cladding material is required to be aligned on the basis of the cladding material, the misalignment of the surfaces of the cladding material does not exceed 1mm, and particularly, the stainless steel composite member with different thicknesses needs to be more careful when assembling the stainless steel composite member. If the misalignment between the cladding materials is too large, the welding seam at the root of the base layer can melt partial stainless steel, so that the metal alloy elements of the welding seam at the root of the base layer are increased, the welding seam becomes hard and brittle, meanwhile, the thickness of the stainless steel at the butt joint of the misalignment is reduced, the service life is reduced, the quality of the welding seam on the surface of the cladding materials is influenced, and the corrosion resistance of a welding structure is difficult to ensure.

In the embodiment, the H-shaped main body part is a new section, not only has all the performances of the H-shaped steel, but also has very good corrosion resistance on the surface, and the corrosion resistance problem under a severe corrosion environment is effectively solved. In this embodiment, the wing plate 21 and the web plate 22 of the H-shaped main body are formed by pressing the stainless steel clad material on the surface and the carbon steel or the low alloy structural steel of the core portion together by hot rolling. That is, the core material is carbon steel or low alloy structural steel, the cladding material is stainless steel, and the two are hot-rolled into a whole.

The coating material can be selected from various grades of stainless steel and duplex stainless steel; the core material can be selected from common carbon structural steel and low alloy structural steel (such as Q235, Q275, Q355, etc.).

It is known that weldability of dissimilar materials is mainly determined by metallurgical compatibility, physical properties, surface state, etc. of two or more materials, and the larger the difference in these properties between the two or more materials to be welded, the poorer the weldability. In addition, the weldability of dissimilar materials is also related to the welding process, including factors such as the size of the weld joint, the groove form, the weld orientation, the welding process parameters, and the operating level of the welding process. Carbon steel contains carbon more than stainless steel, and the welding of stainless steel by carbon steel welding rods is easy to cause intercrystalline corrosion. Therefore, for the welding of stainless steel, a low-carbon or even ultra-low-carbon stainless steel welding rod should be selected; the welding of carbon steel should be carried out by using carbon steel welding rods. Generally, stainless steel electrodes are not used to weld carbon steel because the long term contact between stainless steel and carbon steel produces a "carburization reaction" that affects the properties of stainless steel.

In this embodiment, the grade of the welding wire is selected to be one grade higher than the cladding (stainless steel as the cladding 102). That is, the weld metal tensile strength of the weld material is higher than the weld metal tensile strength of the weld material required for welding clad stainless steel.

Thus, the welding seam is formed by using a stainless steel welding wire welding process, but two stainless steel composite plates with carbon steel as core materials are welded into a whole. Further, as described above, the stainless steel as the clad material is not welded through (shown by h1 and h2 in fig. 1B) by welding, so that the "carburization reaction" does not occur.

In this embodiment, the specification of the H-shaped body portion is: firstly, the part specification in YB 3001-2005 standard; and II, the specification of parts in GB/T11263-2005 standard. The length, the size and the tolerance of the product with the performance meeting or being better than the two standards can be equal to or better than the standard requirements, the technical requirements and the quality requirements of the parts.

In this embodiment, the H-shaped body portion has the following advantages:

firstly, the anti-corrosion performance is far higher than the anti-corrosion effects of the prior surface galvanized steel, chrome-plated steel, weathering steel and the like;

in terms of mechanical properties, the problem of low strength of the full stainless steel can be effectively solved by adjusting the type of the inner core material (for example, adjusting the inner core material from Q235 to Q275 or Q355) through the structural form of combining the inner core material with the outer stainless steel cladding material;

and thirdly, the technical problem that the coated section obtained by the hot rolling process can only be a plate, a pipe and the like but not a special-shaped section is solved.

After the H-shaped body portion is spliced, the contact position between the wing plate 21 and the web 22 may be fixed by welding using a predetermined flux. It is understood that the main body part is an H-shaped main body part in the above embodiments, and in other embodiments, the shape of the main body part may be adaptively changed as needed.

After the welding of H type main part is accomplished, place this H type main part on bottom plate 1 for two pterygoid lamina 21 and a web 22 all contact with the surface of bottom plate 1, at this moment, usable this settlement welding flux carries out welded fastening to the position department that two pterygoid lamina 21 and a web 22 contacted with bottom plate 1, and at this moment, H type main part and bottom plate 1 relatively fixed form this stainless steel composite sectional material jointly.

In one embodiment, the set flux is a132 or a137, and the welding depth of the first weld seam 3 is not greater than the cladding thickness of the second composite material 2, and the welding depth of the second weld seam 4 is not greater than the cladding thickness of the first composite material 1 and the second composite material 2. Specifically, since the first welding line 3 and the second welding line 4 are formed in the cladding material of the stainless steel composite plate in the present application, carburization is to be avoided for welding of the cladding material, and since the carburization of the welding lines can greatly reduce the corrosion resistance of the stainless composite steel member, welding rods corresponding to the material of the cladding material, such as a132 or a137, should be selected for welding of the cladding material and the cladding material. Meanwhile, in the welding process, the depth of the first weld joint 3 and the second weld joint 4 is smaller than the thickness of the cladding material, and welding to the core substrate should be avoided to prevent damage to the core substrate, so that the welding depth (depth of the weld joint) of the first weld joint 3 and the second weld joint 4 needs to be determined according to the thickness of the cladding material of the first stainless steel composite plate and the thickness of the cladding material of the second stainless steel composite plate. It should be understood that, since the coating material will wrap the base layer, if the stainless steel composite board is placed on a horizontal plane, the stainless steel composite board has a three-layer structure including a top coating material, a middle base layer and a bottom coating material when viewed in a longitudinal section, and the thickness of the coating material in this embodiment refers to the thickness of the top coating material or the thickness of the bottom coating material.

In an embodiment, the stainless steel composite profile further includes a plurality of reinforcing ribs 5, the reinforcing ribs 5 are a third stainless steel composite plate, and two adjacent sides of the third stainless steel composite plate are respectively welded and fixed with the wing plate 21 and the bottom plate 1 to form a third welding seam 6. Specifically, in this embodiment, the reinforcing rib 5 is in the shape of a right triangle, one right-angle side of the reinforcing rib 5 is welded and fixed to the wing plate 21, and the other right-angle side of the reinforcing rib is welded and fixed to the bottom plate 1, wherein the number of the reinforcing ribs 5 may be four, eight or more, and meanwhile, the position of the reinforcing rib 5 may also be determined as required. It will be readily appreciated that in other embodiments, the reinforcing bars 5 may be stainless steel composite plates of other shapes.

In summary, in the embodiment of the present invention, the coating material can be 36Ti and other grades, the stainless steel core material is Q295 or Q355 and other grades of low alloy structural steel, and the cross section of the stainless steel composite profile can be sealed and welded by stainless steel with a thickness of 0.5-1mm, or by welding wire. The corrosion prevention of the inner side of the hole of the stainless steel composite section can be embedded by a stainless steel sleeve with the diameter of 1.5-2mm, and the two sides are sealed and welded by self-fusion welding or a stainless steel welding wire.

The upper portion 121 of the bolt connection 12 is made of duplex stainless steel, ensuring its tensile strength and corrosion resistance. And because the length is shorter and the consumption of steel is less, the method has the advantages of ensuring the performance, saving precious metals and solving the problem of corrosion resistance.

The lower part 123 of the bolt connection 12 is screwed by the intermediate connection 122, wherein the upper part 121, the intermediate connection 122 and the lower part 123 each have a high-strength connection thread, whereby the lower part 123 of the bolt connection 12 is mechanically connected to the upper part 121 by means of a screw connection. The lower portion 123 can be buried in the ground better because of its longer length, so that the duplex stainless steel material can be saved reasonably to save cost. The middle connection portion 122 is a stainless steel nut, the stress strength of which reaches the carbon steel nut of the same level, and the stainless steel nut is in a double-nut form.

In the specific construction process, the stainless steel composite section can effectively solve the corrosion prevention problem, and meanwhile, about 8% of precious high-end stainless steel metal materials can be saved, and the production cost is effectively reduced.

Referring to fig. 2, a method for manufacturing a special-shaped clad profile provided in an embodiment of the present invention specifically includes the following steps:

and S10, taking the first stainless steel composite board 1 as a bottom board, and arranging a connecting hole 11 on the bottom board 1 for connecting with other components.

Specifically, a rectangular first stainless steel composite board with a proper thickness is selected as the bottom plate 1, and then, connecting holes 11 are respectively formed in four corners of the rectangular bottom plate 1, wherein the size of each connecting hole is determined according to the size of each connecting piece.

And S20, splicing a plurality of second stainless steel composite plates 2 to form a main body part with a set shape.

Specifically, two pieces of second stainless steel composite plates with the same size are selected as the wing plates 21, and another piece of second stainless steel composite plate corresponding to the size of the wing plates 21 is selected as the web plate 22, wherein the length of the web plate 22 is equal to the length of the wing plates 21. During concrete concatenation, place two pterygoid lamina 21 parallel in advance, then, insert web 22 between two pterygoid lamina 21 for the both ends of web 22 are connected perpendicularly respectively in the central line position of two pterygoid laminas 21, thereby splice into H type main part jointly.

And S30, welding and fixing the spliced part of any two adjacent second stainless steel composite boards by using a set flux to form a first welding seam 3.

Specifically, after the H-shaped main body is spliced, the spliced part where the two wing plates 21 and the web plate 22 are in contact is welded and fixed by using a132 or a137, so as to form the first welding seam 3.

S40, the welded body 2 is placed on the first stainless steel composite plate 1.

Specifically, after the main body 2 is welded, the H-shaped main body is placed on the first stainless steel composite board 1, so that the two wing plates 21 and one web plate 22 are both in contact with the first stainless steel composite board 1.

And S50, continuously welding and fixing the contact position of any second stainless steel composite board and the first stainless steel composite board by using the set flux to form a second welding seam 4.

Specifically, after the main body 2 is placed on the first stainless steel composite board 1, the two wing plates 21 and the web plate 22 are welded and fixed at the position where they contact the first stainless steel composite board 1 by using a132 or a137, so as to form the second weld 4.

And S60, taking the third stainless steel composite plate as the reinforcing ribs 5, and welding and fixing the two adjacent sides of the reinforcing ribs 5 with the main body part 1 and the bottom plate 2 respectively through welding fluxes to form third welding seams 6.

Specifically, a third stainless steel composite plate in the shape of a right triangle is selected as the reinforcing rib 5, one right-angle side of the reinforcing rib 5 is welded and fixed with the wing plate 21, meanwhile, the other right-angle side of the reinforcing rib 5 is welded and fixed with the bottom plate 1, and a third welding line 6 is formed at the position where the two right-angle sides of the reinforcing rib 5 are in contact with the wing plate 21 and the bottom plate 1.

And S70, cleaning the first welding line 3, the second welding line 4 and the third welding line 6 by using a stainless steel wire brush to avoid impurities remaining on the surface of the stainless steel composite profile.

The present invention has been described in detail. It will be apparent to those skilled in the art that any obvious modifications thereof can be made without departing from the spirit of the invention, which infringes the patent right of the invention and bears the corresponding legal responsibility.