A method for producing corrosion-resistant hot-rolled metal composite profiles

Abstract

This invention belongs to the field of metal rolling technology, specifically a method for producing corrosion-resistant hot-rolled metal composite profiles. It involves preparing a metal composite billet using one solid metal round billet and N layers (N≥1) of metal tube billets, and obtaining the metal composite profile through hot continuous rolling. This method allows for the economical production of corrosion-resistant hot-rolled metal composite profiles according to national standards. The combined rolling process using an asymmetric three-roll Y-type mill and a two-roll continuous rolling mill causes the metal composite billet to undergo plastic deformation under triaxial asymmetric compressive stress, achieving metallurgical bonding at the metal interface and resulting in good strength. The process is characterized by a short flow, low metal loss and energy consumption, simple equipment structure, and low investment and production costs. The produced corrosion-resistant hot-rolled metal composite profiles exhibit good machinability, plastic formability, and excellent corrosion resistance.

Description

Technical Field

[0001] This invention relates to the field of metal rolling technology, specifically to a method for producing corrosion-resistant hot-rolled composite profiles of metals. Background Technology

[0002] With the rapid development of marine engineering technology and shipbuilding engineering in my country, the evolution of metal engineering structures in ordinary atmospheric environments towards larger and more complex sizes, and the increasing demand for longer service life, the corrosion and protection issues of metal structures have become increasingly prominent. To improve the corrosion resistance of metal structures in various environments, enabling them to maintain their original design performance over a long period and reducing production and maintenance costs, the production and application of corrosion-resistant metal composite profiles are essential.

[0003] Currently, there are several production methods for metal composite profiles:

[0004] (1) Bending and forming of bimetallic composite plate

[0005] This method uses adhesive bonding, explosive bonding, or rolling bonding of bimetallic composite sheets, which are then cold-bent to produce bimetallic cold-formed profiles. The disadvantages of this method are: low production efficiency, high metal consumption, high production cost, and a limited variety of bimetallic composite profiles that can be produced. Separation of the bimetallic interface is prone to occur during the bending process. Due to the difficulty in processing and manufacturing the bimetallic composite sheets themselves, the bimetallic composite profiles produced by this method are difficult to use in large quantities.

[0006] (2) Liquid metal infiltration and curing molding

[0007] This method involves weaving a porous skeleton network of high-melting-point metal wires into a profile, then immersing it in a low-melting-point liquid metal. This liquid metal infiltration technique creates an interpenetrating bimetallic composite profile blank. The blank is then subjected to plastic deformation processes such as rolling, drawing, extrusion, and forging to produce bimetallic composite profiles of various sizes and shapes to meet design requirements. However, this method has a complex production process, a narrow range of applicable metal materials, and is not suitable for manufacturing large-size, high-strength structural bimetallic composite profiles.

[0008] (3) Extrusion-rolling forming

[0009] The extrusion-rolling process for preparing bimetallic composite profiles involves first cleaning the substrate and cladding metal; then placing them in an extrusion die and extruding them at a suitable temperature and ratio to obtain a tightly bonded bimetallic composite billet; finally, rolling this billet to obtain the bimetallic composite profile. The disadvantages of this method are: the extrusion process of the bimetallic composite billet is difficult to control, resulting in severe die wear and preventing continuous production; the rolling of the bimetallic composite billet requires secondary heating, leading to low metal yield; and the extruder capacity limits the production of large-size bimetallic composite profiles.

[0010] In summary, existing methods for producing metal composite profiles are not effective in producing corrosion-resistant hot-rolled metal composite profiles for use in engineering structures. Summary of the Invention

[0011] The main objective of this invention is to propose a production method for corrosion-resistant hot-rolled metal composite profiles, aiming to solve the problems existing in the current production of metal composite profiles, such as separation of metal bonding surfaces, low efficiency, high cost, narrow applicability, inability to achieve continuous production, and inability to optimize corrosion resistance.

[0012] To address the aforementioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0013] A method for producing a corrosion-resistant hot-rolled metal composite profile includes the following steps:

[0014] S1. Metal Composite Billet Fabrication

[0015] The metal composite billet is prepared from a solid metal round billet and N layers of metal tube billets. The solid metal round billet serves as the base layer of the metal composite billet, and the N layers of metal tube billets serve as the covering layer. The outer surface of the solid metal round billet and the inner and / or outer surfaces of the metal tube billets are cleaned. The solid metal round billet and the N layers of metal tube billets are pressed together in sequence to form the metal composite billet. The joints at the ends of the metal composite billet are welded and sealed.

[0016] S2. Heating

[0017] The metal composite billet is placed in a heating furnace and heated to the rolling temperature;

[0018] S3. Rolling

[0019] Metal composite billets heated to the rolling temperature are fed into a hot rolling mill to be rolled into metal composite profiles; the hot rolling mill includes an asymmetric three-roll Y-type continuous rolling mill and a two-roll profile continuous rolling mill;

[0020] S4. Cooling, straightening, shearing

[0021] The rolled metal composite profile is cooled, straightened, and sheared to obtain a corrosion-resistant hot-rolled metal composite profile that meets the size and shape requirements.

[0022] In a preferred embodiment of the production method of a corrosion-resistant hot-rolled composite profile of metal according to the present invention, in step S1, N≥1, N is a positive integer; the materials of adjacent two layers of the N-layer metal tube blank are different, and at least the outermost metal tube blank is a corrosion-resistant material.

[0023] As a preferred embodiment of the production method of corrosion-resistant hot-rolled composite profiles of the present invention, in step S1, before pressing, the outer surface of the solid metal round billet and the inner and / or outer surface of the metal tube billet are processed according to the interference fit dimensions to eliminate the gap between the joint surfaces, remove air, and reduce or avoid oxidation of the joint interface when the billet is heated; at the same time, the deformation of the base layer and the cladding layer is easy to coordinate during rolling, and local cavities are not easily formed between the two.

[0024] In a preferred embodiment of the production method of a corrosion-resistant hot-rolled metal composite profile according to the present invention, in step S1, the cladding surface of the metal composite billet is circumferentially clad, and the thickness of the cladding layer is 2.0~3.0 mm. While an excessively thin cladding layer is beneficial for reducing economic costs, it is detrimental to the uniformity of deformation of the cladding metal and easily leads to "void" defects at the metal interface. A cladding layer thickness of 2.0~3.0 mm effectively overcomes these disadvantages and improves the composite profile quality.

[0025] In a preferred embodiment of the production method of corrosion-resistant hot-rolled metal composite profiles according to the present invention, in step S3, the metal composite billet is first rolled into a metal composite profile using an asymmetric three-roll Y-type continuous rolling mill. This allows the metal composite billet to undergo plastic deformation under triaxial asymmetric, large deformation pressure, eliminating potential local gaps during the rolling process and achieving metallurgical bonding at the metal interface, resulting in good strength. Subsequently, the metal composite profile is rolled into a metal composite profile using a two-roll continuous rolling mill. The continuous rolling process using an asymmetric three-roll Y-type continuous rolling mill and a two-roll continuous rolling mill ensures that the metal composite billet remains in a stable state during rolling, guaranteeing the accuracy of the rolled product dimensions.

[0026] In a preferred embodiment of the production method of corrosion-resistant hot-rolled composite profiles according to the present invention, in step S3, the asymmetric three-roll Y-type continuous rolling mill consists of two asymmetric three-roll Y-type mills. The total reduction of the two asymmetric three-roll Y-type mills is not less than 50% of the total reduction, and the reduction of the second rolling pass is not less than 30%. This large rolling deformation enables metal composite formation, which helps to ensure that the maximum vertical stress between the cladding layers and between the cladding layers and the base layer exceeds the deformation resistance of the material at that temperature, thus achieving metallurgical bonding of the metals.

[0027] In a preferred embodiment of the production method for a corrosion-resistant hot-rolled composite profile according to the present invention, in step S3, both asymmetric three-roll Y-type mills are arranged in an inverted Y-shape, and the two-roll profile continuous rolling mill consists of 6 to 12 two-roll profile mills. Micro-tension rolling is achieved between each mill, with a tension coefficient between 1.01 and 1.05. Micro-tension effectively reduces the tendency for metal to accumulate at the roll gap, improving the uniformity of the cladding wall thickness; conversely, an excessively high tension coefficient easily promotes the generation and expansion of interfacial "void" defects.

[0028] As a preferred embodiment of the production method of corrosion-resistant hot-rolled composite profiles according to the present invention, in step S4, the corrosion-resistant hot-rolled composite profiles include, but are not limited to, angle profiles, channel profiles, H-profiles, Z-profiles, T-profiles, etc.

[0029] In a preferred embodiment of the production method of a corrosion-resistant hot-rolled composite profile according to the present invention, in step S4, the metal bonding state of the corrosion-resistant hot-rolled composite profile is mainly metallurgical bonding, and the metallurgical bonding area is greater than 60% of the total composite area.

[0030] To solve the above-mentioned technical problems, according to another aspect of the present invention, the present invention provides the following technical solution:

[0031] A corrosion-resistant hot-rolled metal composite profile is produced using the above-mentioned production method.

[0032] The beneficial effects of this invention are as follows:

[0033] The present invention proposes a method for producing corrosion-resistant hot-rolled metal composite profiles. This method uses one solid metal round billet and N layers of metal tube billets to prepare a metal composite billet, which is then obtained through hot continuous rolling. This method allows for the economical production of corrosion-resistant hot-rolled metal composite profiles according to national standards. The combined rolling process using an asymmetric three-roll Y-type continuous rolling mill and a two-roll profile continuous rolling mill causes the metal composite billet to undergo plastic deformation under triaxial asymmetric compressive stress, achieving metallurgical bonding at the metal interface and resulting in good strength. The process is characterized by a short flow, low metal loss and energy consumption, simple equipment structure, and low investment and production costs. The produced corrosion-resistant hot-rolled metal composite profiles exhibit good machinability, plastic formability, and excellent corrosion resistance. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the corrosion-resistant hot-rolled composite profile of metal according to the present invention;

[0036] Figure 2 This is a schematic diagram of the bimetallic composite blank of the present invention;

[0037] Figure 3 This is a rolling pass diagram of the hot-rolled corrosion-resistant metal composite profile of the present invention.

[0038] In the figure, 1-base layer; 2-cladding layer; 3-metal tube blank; 4-solid metal round blank.

[0039] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0041] The production method for corrosion-resistant hot-rolled metal composite profiles proposed in this invention features a short process flow, low metal loss and energy consumption, simple equipment structure, and low investment and production costs. The produced corrosion-resistant hot-rolled metal composite profiles exhibit good machinability, plastic formability, and excellent corrosion resistance. A metal composite billet is prepared using one solid metal round billet and N layers of metal tube billets, and the metal composite profile is obtained through hot continuous rolling. This method allows for the economical production of corrosion-resistant hot-rolled metal composite profiles according to national standards. The combined rolling process using an asymmetric three-roll Y-type continuous rolling mill and a two-roll profile continuous rolling mill causes the metal composite billet to undergo plastic deformation under triaxial asymmetric compressive stress, achieving metallurgical bonding at the metal interface and resulting in good strength.

[0042] A method for producing corrosion-resistant hot-rolled composite profiles of metals includes the following steps:

[0043] S1. Metal Composite Billet Fabrication

[0044] like Figure 1-2 As shown, the metal composite billet is prepared from a solid metal round billet 4 and an N-layer metal tube billet 3. The solid metal round billet 4 serves as the base layer 1 of the metal composite billet, and the N-layer metal tube billet 3 serves as the covering layer 2 of the metal composite billet. The outer surface of the solid metal round billet 4 and the inner and / or outer surfaces of the metal tube billet 3 are cleaned. The solid metal round billet 4 and the N-layer metal tube billet 3 are pressed together in sequence to form the metal composite billet. The joints at the end faces of the metal composite billet are welded and sealed. The covering surface of the metal composite billet is circumferentially covered, and the thickness of the covering layer is 2.0~3.0mm. Specifically, the thickness of the covering layer is, for example, but not limited to, any one or any two of 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, and 3.0mm.

[0045] Metal composite billets are made using one solid metal round billet and N layers of metal tube billets. The use of the intermediate layer can reduce the thickness of the outermost corrosion-resistant material tube billet, thereby saving material and achieving the effect of improving the corrosion resistance of the profile while saving costs. At the same time, the intermediate layer can also provide support and transition for the outermost and central round billets, making it easier to provide support when the outermost corrosion-resistant material is thin, and can solve the problem of difficulty in forming a good metallurgical bond when the central round billet is in direct contact with some corrosion-resistant materials.

[0046] The N≥1, where N is a positive integer, such as but not limited to 1, 2, 3, etc., the materials of adjacent two layers of the N-layer metal tube blank are different, and at least the outermost metal tube blank is made of a corrosion-resistant material.

[0047] S2. Heating

[0048] The metal composite billet is placed in a heating furnace and heated to the rolling temperature;

[0049] The rolling temperature can be adjusted according to the material of the round billet and tube billet used, for example, it can be 1050℃-1300℃, specifically, for example, but not limited to any one or any two of 1050℃, 1100℃, 1150℃, 1200℃, 1250℃, and 1300℃.

[0050] S3. Rolling

[0051] Metal composite billets heated to the rolling temperature are fed into a hot rolling mill to be rolled into metal composite profiles; the hot rolling mill includes an asymmetric three-roll Y-type continuous rolling mill and a two-roll profile continuous rolling mill;

[0052] Specifically, the metal composite billet is first rolled into a metal composite profile using an asymmetric three-roll Y-type continuous rolling mill, which causes plastic deformation of the metal composite billet under the action of triaxial asymmetric compressive stress, achieving metallurgical bonding at the metal interface and resulting in good strength; then the metal composite profile is rolled into a metal composite profile using a two-roll continuous rolling mill.

[0053] S4. Cooling, straightening, shearing

[0054] The rolled metal composite profiles are cooled, straightened, and sheared to obtain corrosion-resistant hot-rolled metal composite profiles that meet the required dimensions and shapes. These corrosion-resistant hot-rolled metal composite profiles include, but are not limited to, corner profiles (such as...). Figure 1 As shown in (a), channel profiles (such as...) Figure 1 As shown in (b), H-shaped profiles (such as...) Figure 1 As shown in (c), Z-shaped profiles (such as...) Figure 1 As shown in (d), T-shaped profiles (such as...) Figure 1 (as shown in (e)).

[0055] Example 1

[0056] The production method of #5 angle stainless steel / carbon steel hot-rolled bimetallic corrosion-resistant composite profile includes the following steps:

[0057] S1. A solid 20MnSi carbon steel round billet with a diameter of 60mm×500mm is used as the base layer of the bimetallic composite billet, and a 2205 stainless steel pipe with a diameter of 65mm×3mm×500mm is used as the cladding layer of the bimetallic composite billet. The joint surfaces of the two are processed according to the interference fit dimensions, and then press-fitted and welded at the cross-section.

[0058] S2. Place the bimetallic composite billet in a heating furnace and heat it to a rolling temperature of 1120℃;

[0059] S3. The heated bimetallic composite billet is first rolled into a bimetallic composite profile billet by two asymmetric three-roll Y-type rolling mills, and then rolled into a bimetallic composite profile by six two-roll profile rolling mills.

[0060] S4. The rolled bimetallic composite profile is subjected to finishing processes such as cooling, straightening, and shearing to obtain a No. 5 angle stainless steel / carbon steel hot-rolled corrosion-resistant bimetallic composite profile that meets the size and shape requirements and corrosion resistance performance.

[0061] The side length of the 5# angle stainless steel / carbon steel hot-rolled bimetallic corrosion-resistant composite profile is 50mm, and its geometric dimensions and shape tolerances conform to the specifications for 5# angle steel in GB / T706-2008. The bimetallic interface of the 5# angle stainless steel / carbon steel hot-rolled corrosion-resistant composite profile exhibits good metallurgical bonding. Cutting an 80mm long sample at any location revealed that the cladding metal and the base metal did not freely separate. Tensile testing of the composite sample showed an average tensile strength ≥ 560 MPa and an elongation ≥ 30%; the allowable deviation was (-0.5~+0.92)mm, and the curvature ≤ 6mm / m. The mechanical properties all exceed the national standard for single-core 20MnSi carbon steel. The corrosion resistance of the stainless steel / carbon steel hot-rolled composite profile was evaluated according to Method A in GB / T4334-2008. No groove-like structures were found in the post-corrosion microstructure, indicating no tendency for intergranular corrosion. This meets the corrosion resistance requirements for metal structural materials in marine environments and ordinary atmospheric environments.

[0062] Example 2

[0063] The production method of 7# channel-shaped stainless steel / carbon steel bimetallic corrosion-resistant composite profile includes the following steps:

[0064] S1. A solid 20MnSi carbon steel round billet with a diameter of 80mm×500mm is used as the base layer of the bimetallic composite billet, and a 2205 stainless steel pipe with a diameter of 85mm×3mm×500mm is used as the cladding layer of the bimetallic composite billet. The joint surfaces of the two are processed according to the interference fit dimensions, and then press-fitted and welded at the cross-section.

[0065] S2. Place the bimetallic composite billet in a heating furnace and heat it to a rolling temperature of 1160℃;

[0066] S3. The heated bimetallic composite billet is first rolled into a bimetallic composite profile using a two-stand asymmetric three-roll Y-type mill, and then rolled into a bimetallic composite profile using an eight-stand two-roll mill. The rolling pass pattern for the hot-rolled metal composite profile is as follows: Figure 3 As shown;

[0067] S4. The rolled bimetallic composite profile is subjected to finishing processes such as cooling, straightening, and shearing to obtain a No. 7 channel-shaped stainless steel / carbon steel bimetallic corrosion-resistant composite profile that meets the size and shape requirements and corrosion resistance performance.

[0068] The height of the 7# channel-shaped stainless steel / carbon steel bimetallic corrosion-resistant composite profile is 70mm, and its geometric dimensions and shape tolerances conform to the specifications for 7# channel steel in GB / T706-2008. The bimetallic interface of the 7# channel-shaped stainless steel / carbon steel bimetallic corrosion-resistant composite profile exhibits good metallurgical bonding. Cutting an 80mm long sample at any location revealed that the cladding metal and the base metal did not freely separate. Tensile testing of the composite samples showed an average tensile strength ≥ 560 MPa and an elongation ≥ 30%; the allowable deviation was (-0.5~+0.92)mm, and the bending degree ≤ 6mm / m. The mechanical properties all exceed the national standard for single-core 20MnSi carbon steel. The corrosion resistance of the stainless steel / carbon steel hot-rolled composite profile was evaluated according to Method A in GB / T4334-2008. No groove-like structures were found in the post-corrosion microstructure, indicating no tendency for intergranular corrosion. This meets the corrosion resistance requirements for metal structural materials in marine environments and ordinary atmospheric environments.

[0069] Example 3

[0070] The production method of #3 angle stainless steel / copper / carbon steel multimetal corrosion-resistant composite profile includes the following steps:

[0071] S1. A solid 20MnSi carbon steel round billet with a diameter of 38mm×500mm is used as the base layer of the multi-metal composite billet. From the outside to the inside, 2205 stainless steel pipe with a diameter of 43mm×1.5mm×500mm and T2 copper pipe with a diameter of 40mm×1.5mm×500mm are used as the cladding layer of the multi-metal composite billet. The joint surfaces of the two are processed according to the interference fit dimensions, and then pressed and welded to seal the cross-section.

[0072] S2. Place the multi-metal composite billet in a heating furnace and heat it to a rolling temperature of 1150℃;

[0073] S3. The heated multi-metal composite billet is first rolled into a multi-metal composite profile by two asymmetric three-roll Y-type mills, and then rolled into a multi-metal composite profile by eight two-roll mills.

[0074] S4. The rolled multi-metal composite profile is subjected to finishing processes such as cooling, straightening, and shearing to obtain a No. 3 angle stainless steel / copper / carbon steel multi-metal corrosion-resistant composite profile that meets the size and shape requirements and corrosion resistance performance.

[0075] The height of the #3 angle stainless steel / copper / carbon steel multimetal corrosion-resistant composite profile is 30mm, and its geometric dimensions and shape tolerances conform to the specifications for #3 angle steel in GB / T706-2008. The metal interface of the #3 angle stainless steel / copper / carbon steel multimetal corrosion-resistant composite profile exhibits good metallurgical bonding. Cutting an 80mm long sample at any location reveals that the cladding metal does not freely detach from the base metal. Tensile testing of the composite samples shows an average tensile strength ≥ 560 MPa, elongation ≥ 30%, allowable deviation (-0.5~+0.92)mm, and bending ≤ 6mm / m. All mechanical properties exceed the national standard for single-core 20MnSi carbon steel. The corrosion resistance of stainless steel / copper / carbon steel hot-rolled composite profiles was evaluated according to Method A in GB / T4334-2008. No groove-like structures were found in the microstructure after corrosion, indicating no tendency for intergranular corrosion. This meets the corrosion resistance requirements of metal structural materials in marine environments and ordinary atmospheric environments.

[0076] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A method for producing corrosion-resistant hot-rolled metal composite profiles, characterized in that, Includes the following steps: S1. Metal Composite Billet Fabrication The metal composite billet is prepared from one solid metal round billet and N layers of metal tube billets. The solid metal round billet serves as the base layer of the metal composite billet, and the N layers of metal tube billets serve as the covering layer. The outer surface of the solid metal round billet and the inner and / or outer surfaces of the metal tube billets are cleaned. The solid metal round billet and the N layers of metal tube billets are pressed together in sequence to form the metal composite billet. The joints at the ends of the metal composite billet are welded and sealed. N≥2, where N is a positive integer. The materials of adjacent layers of the N layers of metal tube billets are different, and at least the outermost metal tube billet is made of a corrosion-resistant material. S2. Heating The metal composite billet is placed in a heating furnace and heated to the rolling temperature; S3. Rolling The metal composite billet heated to the rolling temperature is fed into the hot rolling mill to be rolled into a metal composite profile. The hot rolling mill includes an asymmetric three-roll Y-type continuous rolling mill and a two-roll profile continuous rolling mill. The metal composite profile billet is first rolled into a metal composite profile by the asymmetric three-roll Y-type continuous rolling mill, and then the metal composite profile billet enters the two-roll profile continuous rolling mill to be rolled into a metal composite profile. S4. Cooling, straightening, shearing The rolled metal composite profile is cooled, straightened, and sheared to obtain a corrosion-resistant hot-rolled metal composite profile that meets the size and shape requirements. The metal bonding state of the corrosion-resistant hot-rolled metal composite profile is mainly metallurgical bonding, and its metallurgical bonding area is greater than 60% of the total composite area.

2. The method for producing a corrosion-resistant hot-rolled metal composite profile according to claim 1, characterized in that, In step S1, before pressing, the outer surface of the solid metal round billet and the inner and / or outer surface of the metal tube billet are machined according to the interference fit dimensions.

3. The method for producing a corrosion-resistant hot-rolled metal composite profile according to claim 1, characterized in that, In step S1, the cladding surface of the metal composite billet is circumferentially clad, and the thickness of the cladding layer is 2.0 to 3.0 mm.

4. The method for producing a corrosion-resistant hot-rolled metal composite profile according to claim 1, characterized in that, In step S3, the asymmetric three-roll Y-type continuous rolling mill consists of two asymmetric three-roll Y-type rolling mills, both of which are arranged in reverse Y-shape; the two-roll section continuous rolling mill consists of 6 to 12 two-roll section rolling mills.

5. The method for producing a corrosion-resistant hot-rolled metal composite profile according to claim 4, characterized in that, In step S3, micro-tension rolling is formed between each rolling mill, with a tension coefficient between 1.01 and 1.

05.

6. The method for producing a corrosion-resistant hot-rolled metal composite profile according to claim 1, characterized in that, In step S4, the corrosion-resistant hot-rolled composite profiles include: angle profiles, channel profiles, H-profiles, Z-profiles, and T-profiles.

7. A corrosion-resistant hot-rolled metal composite profile, produced by the production method of the corrosion-resistant hot-rolled metal composite profile according to any one of claims 1-6.

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