Dissimilar metal base material welding profile for shipbuilding and ship

Abstract

The invention discloses a dissimilar metal base material welding profile for shipbuilding and a ship, and relates to the shipbuilding welding technology, a metal base material comprises a first metal base material and a second metal base material, the first metal base material is welded with the second metal base material, and the heat conductivity coefficient of the first metal base material is larger than that of the second metal base material. The first metal base material is provided with a heat dissipation part for releasing welding heat during welding operation based on the welding profile; or the first metal base material and the second metal base material are provided with heat dissipation parts for releasing welding heat during welding operation based on the welding profile, one end of each heat dissipation part is connected with the corresponding metal base material, and the other end of each heat dissipation part is used for being connected with a welding object during welding operation. The ship comprises an upper-layer main body mainly constructed by the first metal base material and a lower-layer main body mainly constructed by the second metal base material, at least part of the upper-layer main body and the lower-layer main body are welded and connected through the dissimilar metal base material welding profile for ship manufacturing, and the dissimilar metal base material welding profile for ship manufacturing has the advantages that the ship manufacturing quality efficiency can be improved, and the post-welding performance is better.

Description

Technical Field

[0001] The invention relates to the technical field of welding in shipbuilding, and in particular to a dissimilar metal substrate welding profile and a ship used in shipbuilding. Background Art

[0002] In the existing shipbuilding field, the ship deck and the lower deck are mainly welded with steel to form the main structure of the ship, and the superstructure above the deck is generally welded with aluminum alloy materials to form the main structure of the building. The hull of this structure is resistant to underwater impact, has good safety, a low center of gravity, good stability, and is lightweight, which is conducive to improving navigation speed and fuel efficiency.

[0003] When adopting the above-mentioned hull structure, it is inevitable to face the problem of dissimilar metal welding between aluminum alloy materials and steel materials. Due to the limitations of welding equipment and welding process technology, it is currently impossible to directly weld dissimilar metals at the ship manufacturing site and meet the relevant standards for ship manufacturing. In order to solve the above problems, an aluminum-steel composite material made of explosive welding technology has appeared on the market. It is used as a transition material, and its aluminum base part is welded to the upper aluminum building main structure, and its steel base part is welded to the lower steel ship main structure. Explosive welding technology refers to the technology of welding different metal parts together using the energy driven by the explosion of explosives. Based on the principle of explosive welding, the steel base part is generally used as the base plate, and the aluminum base part is used as a composite plate to cover the steel base plate. This is because the aluminum base plate has a lower density and a smaller mass under the same area and thickness. When the explosion energy is released above the aluminum base plate, it can transmit the impact more efficiently, so that the two materials can achieve a better connection strength; however, it is also due to the limitation of the explosive welding principle that the thickness of the aluminum base plate is limited. The maximum theoretical thickness of the aluminum base plate is only 30mm (the aluminum-steel composite material made by the explosive welding technology on the market currently has a maximum aluminum layer thickness of only about 15mm). When the aluminum base plate as a composite plate is too thick, even if the explosion energy is large enough to damage the aluminum base plate, it is impossible to form an effective connection between the aluminum base plate and the iron base plate. Therefore, limited by the existing level of explosive welding technology, the overall thickness of the existing aluminum-steel composite material can only reach 34-36mm at most, of which the maximum thickness of the aluminum base plate is only 16mm, and the pull-off strength is about 80Mpa.

[0004] When the material is welded to the steel or aluminum part of the hull, the welding point is close to the aluminum-steel connection interface of the material. The high temperature heat generated by welding will inevitably damage the performance of the above connection interface, resulting in a pull-off strength damage of more than 20% (generally about 25%) after welding. In response to the above problems, in the existing design scheme for shipbuilding, one is to require that the aluminum-steel composite material should be no less than four times the width of the aluminum material to which it is welded, so that the post-welding performance can reach the minimum connection strength standard even if it is partially damaged; the second is to use intermittent multiple welding to control the welding heat in order to reduce the impact on the post-welding performance. However, the above existing solutions cannot achieve precise control of welding heat, and cannot fully guarantee that the post-welding performance can fully meet the strength standard requirements. The intermittent multiple welding method is not only inefficient, but also more difficult to control the welding quality. At the same time, the width requirement of the aluminum-steel composite material leads to the interference of the width of the aluminum-steel composite material when welding some special hull structures, which is not convenient for welding construction (see "CB / T3953-2019 Technical Requirements for Welding of Aluminum-Steel Transition Joints" for details). Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a dissimilar metal substrate welding profile and a ship for shipbuilding which can improve the quality and efficiency of shipbuilding and have better post-welding performance.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A dissimilar metal substrate welding profile for shipbuilding, the metal substrate comprising a first metal substrate and a second metal substrate, the first metal substrate being welded to the second metal substrate, the thermal conductivity of the first metal substrate being greater than the thermal conductivity of the second metal substrate, the first metal substrate being provided with a heat dissipation portion for releasing welding heat when welding is performed on the welding profile; or the first metal substrate and the second metal substrate being provided with a heat dissipation portion for releasing welding heat when welding is performed on the welding profile, one end of the heat dissipation portion being connected to the metal substrate, and the other end being used for connecting to a welding object during welding.

[0008] As a further improvement of the above technical solution:

[0009] The first metal substrate and the second metal substrate are connected by explosion welding, the heat dissipation portion is welded to the metal substrate, and the heat dissipation portion and the welded metal substrate are made of the same metal material.

[0010] The first metal substrate and the second metal substrate are connected by stir friction welding, the heat dissipation portion and the metal substrate are integrally formed, and the heat dissipation portion and the metal substrate connected by welding are made of the same metal material.

[0011] The surface of the heat dissipation part is provided with heat dissipation patterns.

[0012] The heat dissipation part is provided with heat dissipation holes and / or heat dissipation grooves.

[0013] The surface of the heat dissipation part is provided with heat dissipation fins.

[0014] The heat dissipation fins are arranged in parallel or in a cross-shaped staggered arrangement.

[0015] An interface for installing an active radiator is formed between the heat dissipation fins.

[0016] The interface is a slide groove that facilitates the sliding of the active radiator.

[0017] A heat dissipation pipe is arranged on the surface of the heat dissipation part.

[0018] One end of the heat dissipation pipe connected to the surface of the heat dissipation part is provided with a through hole communicated with the inner hole of the heat dissipation pipe.

[0019] The first metal substrate is an aluminum alloy substrate, and the second metal substrate is a steel substrate.

[0020] The first metal substrate is an aluminum alloy substrate, and the second metal substrate is a titanium substrate.

[0021] A welding auxiliary layer is provided between the first metal substrate and the second metal substrate.

[0022] A ship comprises an upper body mainly constructed of a first metal substrate and a lower body mainly constructed of a second metal substrate, wherein the upper body and the lower body are at least partially welded together by the above-mentioned dissimilar metal substrate welding profile for shipbuilding.

[0023] Compared with the prior art, the advantages of the present invention are:

[0024] The dissimilar metal substrate welding profile for shipbuilding of the present invention provides a heat dissipation portion on at least the first metal substrate with a larger thermal conductivity, and is connected to the welding object through the heat dissipation portion during welding operation, so that the welding heat generated during welding operation can be directly and quickly released at a close distance to reduce the heat transfer to the welding seam between the first metal substrate and the second metal substrate. In addition, the heat dissipation portion increases the distance from the welding operation position to the welding seam between the first metal substrate and the second metal substrate, increases the heat transfer stroke between the two, and can further reduce the heat transfer to the welding seam between the first metal substrate and the second metal substrate, thereby ensuring that the welding profile of the present invention can achieve continuous welding and improve the welding efficiency of shipbuilding when applied to the field of shipbuilding. rate, and has better post-weld performance; at the same time, the welding connection between the heat dissipation part and the metal substrate can be completed in the production factory of the welding profile. Since it is not limited by the conditions of the ship manufacturing welding site, when producing the welding profile of the present invention, the existing temperature control and low-temperature welding technology such as underwater welding can be used to complete the welding between the heat dissipation part and the metal substrate; after the dissimilar metal substrate welding profile of the present invention is applied to the welding of the hull, when the dissimilar metal connection interface cracks, the dissimilar metal substrate welding profile and the part of the hull structure connected thereto can be cut off together, and then the dissimilar metal substrate welding profile of the present invention can be used for welding repair. Since the present invention has a heat dissipation part, the heat transfer during welding repair can be reduced, so it also has obvious advantages in the welding repair operation of the hull.

[0025] The ship of the present invention includes all the technical features of the above-mentioned dissimilar metal substrate welding profiles for shipbuilding, and therefore has corresponding technical effects, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of Example 1 of the dissimilar metal substrate welding profile used in shipbuilding of the present invention.

[0028] Figure 2 It is a three-dimensional structural schematic diagram of Example 2 of the dissimilar metal substrate welding profile used in shipbuilding of the present invention.

[0029] Figure 3 It is a schematic diagram of the three-dimensional structure of Example 3 of the dissimilar metal substrate welding profile used in shipbuilding of the present invention.

[0030] Figure 4 It is a three-dimensional structural schematic diagram of Example 4 of the dissimilar metal substrate welding profile used in shipbuilding of the present invention.

[0031] Figure 5 It is a three-dimensional structural schematic diagram of Example 5 of the dissimilar metal substrate welding profile used in shipbuilding of the present invention.

[0032] Figure 6 It is a schematic diagram of the three-dimensional structure of Example 7 of the dissimilar metal substrate welding profile used in shipbuilding of the present invention.

[0033] Figure 7 It is a schematic diagram of the three-dimensional structure of Example 8 of the dissimilar metal substrate welding profile used in shipbuilding of the present invention.

[0034] Figure 8 It is a schematic diagram of the three-dimensional structure of Example 9 of the dissimilar metal substrate welding profile used in shipbuilding of the present invention.

[0035] Fig. 9 It is a three-dimensional structural schematic diagram of Example 10 of the dissimilar metal substrate welding profile used in shipbuilding of the present invention.

[0036] Fig.10 It is a three-dimensional structural schematic diagram of Example 11 of the dissimilar metal substrate welding profile used in shipbuilding of the present invention.

[0037] Fig.11 yes Fig.10 Enlarged schematic diagram of point I in the middle.

[0038] Fig.12 It is a structural schematic diagram of a ship embodiment of the present invention.

[0039] The reference numerals in the accompanying drawings represent:

[0040] 1. First metal substrate; 2. Second metal substrate; 3. Heat dissipation part; 31. Heat dissipation hole; 32. Heat dissipation slot; 33. Heat dissipation fin; 34. Interface; 35. Heat dissipation pipe; 36. Through hole; 4. Active radiator; 5. Welding auxiliary layer; 6. Upper main body; 7. Lower main body. DETAILED DESCRIPTION

[0041] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0042] Welding profile example 1:

[0043] like Figure 1As shown, the dissimilar metal substrate welding profile for shipbuilding of this embodiment, the metal substrate includes a first metal substrate 1 and a second metal substrate 2, the first metal substrate 1 and the second metal substrate 2 are welded together, the thermal conductivity of the first metal substrate 1 is greater than the thermal conductivity of the second metal substrate 2, and the first metal substrate 1 is provided with a heat dissipation portion 3 for releasing welding heat when welding is performed based on the welding profile; one end of the heat dissipation portion 3 is connected to the metal substrate, and the other end is used to be connected to the welding object during the welding operation. The dissimilar metal substrate welding profile for shipbuilding of the present invention, by providing a heat dissipation portion 3 on at least the first metal substrate 1 with a larger thermal conductivity, and connecting with the welding object through the heat dissipation portion 3 during welding operation, can directly release the welding heat generated during welding operation quickly and at a close distance, so as to reduce the heat transfer to the welding joint between the first metal substrate 1 and the second metal substrate 2, and the heat dissipation portion 3 increases the distance from the welding operation position to the welding joint between the first metal substrate 1 and the second metal substrate 2, increases the heat transfer stroke between the two, and can further reduce the heat transfer to the welding joint between the first metal substrate 1 and the second metal substrate 2, thereby ensuring that the welding profile of the present invention can achieve continuous welding and improve the welding efficiency of shipbuilding when applied to the field of shipbuilding, and has better post-welding performance. After the dissimilar metal base material welding profile of the present invention is applied to the welding of the hull, when the dissimilar metal connection interface cracks, the dissimilar metal base material welding profile and the part of the hull structure connected thereto can be cut off together, and then the dissimilar metal base material welding profile of the present invention can be used for welding repair. Since the present invention has a heat dissipation part 3, it can reduce heat transfer during welding repair, and therefore it also has obvious advantages in welding repair operations on the hull.

[0044] In this embodiment, the first metal substrate 1 is an aluminum alloy substrate, the second metal substrate 2 is a steel substrate, the first metal substrate 1 and the second metal substrate 2 are connected by explosion welding, a welding auxiliary layer 5 is provided between the first metal substrate 1 and the second metal substrate 2, the heat dissipation portion 3 is welded and connected to the first metal substrate 1, and the heat dissipation portion 3 and the metal substrate to be welded are the same metal material, and the heat dissipation portion 3 of this embodiment is an aluminum alloy material. The first metal substrate 1 and the second metal substrate 2 are connected by explosion welding, and the welding connection between the heat dissipation portion 3 and the first metal substrate 1 can be completed in the production factory of the welding profile. Since it is not limited by the conditions of the ship manufacturing welding site, when producing the welding profile of the present invention, the existing temperature control and low temperature welding technology such as underwater welding can be used to complete the welding between the heat dissipation portion 3 and the metal substrate.

[0045] In this embodiment, the heat dissipation part 3 is provided with heat dissipation holes 31, and the surface of the heat dissipation part 3 is provided with heat dissipation fins 33, and the heat dissipation fins 33 are arranged in parallel. By providing the heat dissipation holes 31, heat dissipation fins 33 and other structures in the heat dissipation part 3, the rapid heat dissipation capability of the heat dissipation part 3 can be further improved.

[0046] Welding profile example 2:

[0047] like Figure 2 As shown, this embodiment is basically the same as the welding profile embodiment 1, and the only difference is that the first metal substrate 1 and the second metal substrate 2 are both provided with a heat dissipation portion 3 for releasing welding heat when welding is performed based on the welding profile, and the heat dissipation portion 3 is not provided with a heat dissipation hole 31 but is provided with a heat dissipation groove 32, and the heat dissipation groove 32 is S-shaped and dispersedly arranged. The function of the heat dissipation groove 32 is basically the same as that of the heat dissipation hole 31 in embodiment 1, and both are used to improve the rapid heat dissipation capability of the heat dissipation portion 3.

[0048] Welding profile example 3:

[0049] like Figure 3 As shown, this embodiment is basically the same as the welding profile embodiment 2, the only difference is that the heat dissipation portion 3 is not provided with a heat dissipation groove 32, and the heat dissipation fins 33 are arranged in a cross shape, and an interface 34 for installing the active radiator 4 is formed between the heat dissipation fins 33. When the welding profile of this embodiment is welded to the main body of the ship, the interface 34 formed between the heat dissipation fins 33 can be used to quickly fix and install the active radiator 4, which can enhance the rapid heat dissipation capability of the heat dissipation portion 3 on the one hand, and facilitate the welding construction personnel to disassemble and assemble the active radiator 4 on the other hand, and is easy to use.

[0050] Welding profile example 4:

[0051] like Figure 4 As shown, this embodiment is basically the same as the welding profile embodiment 2, the only difference is that the heat dissipation portion 3 is not provided with a heat dissipation groove 32, and the heat dissipation fins 33 are not provided on the surface of the heat dissipation portion 3, but a grid-like heat dissipation pattern is provided on the surface of the heat dissipation portion 3. The function of the grid-like heat dissipation pattern is basically the same as that of the heat dissipation holes 31 in embodiment 1, and both are used to enhance the rapid heat dissipation capability of the heat dissipation portion 3.

[0052] Welding profile example 5:

[0053] like Figure 5 As shown, this embodiment is basically the same as welding profile embodiment 4, the only difference is that the heat dissipation portion 3 is not provided with heat dissipation lines, but the end of the heat dissipation portion 3 connected to the metal substrate is the same width as the metal substrate, and the width gradually decreases toward the end connected to the welding object. This structure further improves the rapid heat dissipation capability of the heat dissipation portion 3 by increasing the surface area and heat-receiving volume of the heat dissipation portion 3.

[0054] Welding profile example 6:

[0055] The dissimilar metal substrate welding profile for shipbuilding in this embodiment comprises a first metal substrate 1 and a second metal substrate 2, the first metal substrate 1 and the second metal substrate 2 are welded together, the thermal conductivity of the first metal substrate 1 is greater than the thermal conductivity of the second metal substrate 2, and the first metal substrate 1 and the second metal substrate 2 are provided with a heat dissipation portion 3 for releasing welding heat when welding is performed based on the welding profile; one end of the heat dissipation portion 3 is connected to the metal substrate, and the other end is used to be connected to a welding object during welding.

[0056] In this embodiment, the first metal substrate 1 is an aluminum alloy substrate, the second metal substrate 2 is a steel substrate, the first metal substrate 1 and the second metal substrate 2 are connected by stir friction welding, the heat dissipation portion 3 is integrally formed with the metal substrate, and the heat dissipation portion 3 and the metal substrate to be welded are the same metal material. The first metal substrate 1 and the second metal substrate 2 are connected by stir friction welding, so that the first metal substrate 1 and the second metal substrate 2 are no longer subject to the thickness restrictions imposed by the explosive welding process, and the heat dissipation portion 3 can be directly reserved when the metal substrate is cut, and the production process is simpler; and, since there is no need to weld the heat dissipation portion 3 to the metal substrate, the welding seam between the first metal substrate 1 and the second metal substrate 2 will no longer be affected by secondary processing, so that the welded profile of this embodiment can show better post-welding performance when applied to shipbuilding.

[0057] Welding profile example 7:

[0058] like Figure 6 As shown, this embodiment is basically the same as the welding profile embodiment 6, and the only difference is that the surface of the heat dissipation portion 3 is provided with an S-shaped heat dissipation groove 32, and the S-shaped heat dissipation groove 32 is used to improve the rapid heat dissipation capability of the heat dissipation portion 3. Assuming that the total width of the first metal substrate 1 and its heat dissipation portion 3 is D, and the total width of the second metal substrate 2 and its heat dissipation portion 3 is L, since the thermal conductivity of aluminum alloy is about 4 to 7 times that of steel, the value range of D can be set to D=4L~7L. In this embodiment, D=4L.

[0059] Welding profile example 8:

[0060] like Figure 7 As shown, this embodiment is basically the same as the welding profile embodiment 6, the only difference is that the heat dissipation part 3 is provided with a heat dissipation hole 31, and the function of the heat dissipation hole 31 is basically the same as that of the S-shaped heat dissipation groove 32 in embodiment 7, both of which are used to improve the rapid heat dissipation capability of the heat dissipation part 3.

[0061] Welding profile example 9:

[0062] like Figure 8As shown, this embodiment is basically the same as the welding profile embodiment 6, the only difference is that the heat dissipation part 3 is provided with heat dissipation fins 33 on the surface, and the heat dissipation fins 33 are arranged in parallel. The function of the heat dissipation fins 33 is basically the same as that of the heat dissipation slots 32 in embodiment 7, and both are used to enhance the rapid heat dissipation capability of the heat dissipation part 3.

[0063] Welding profile example 10:

[0064] like Fig. 9 As shown, this embodiment is basically the same as the welding profile embodiment 9, the only difference is that the heat dissipation fins 33 and the stir friction welds between the first metal substrate 1 and the second metal substrate 2 are arranged in parallel, and an interface 34 for installing the active radiator 4 is formed between the heat dissipation fins 33, and the interface 34 is a slide groove for facilitating the sliding of the active radiator 4. When the welding profile of this embodiment is welded to the main body of the ship, the active radiator 4 can be quickly installed by using the interface 34 formed between the heat dissipation fins 33, which can enhance the rapid heat dissipation capability of the heat dissipation part 3 on the one hand, and facilitate the welding construction personnel to disassemble and assemble the active radiator 4 on the other hand, and as the welding position moves forward, the active radiator 4 can be easily pushed to slide and follow along the slide groove, so that it can dissipate heat more effectively.

[0065] Welding profile example 11:

[0066] like Fig.10 , Fig.11 As shown, this embodiment is basically the same as the welding profile embodiment 6, the only difference is that in this embodiment, the first metal substrate 1 is an aluminum alloy substrate, the second metal substrate 2 is a titanium substrate, and a heat pipe 35 is provided on the surface of the heat dissipation portion 3. The function of the heat pipe 35 is basically the same as that of the heat dissipation groove 32 in embodiment 7, both of which are used to improve the rapid heat dissipation capability of the heat dissipation portion 3. A through hole 36 connected to the inner hole of the heat pipe 35 is provided at one end of the heat pipe 35 connected to the surface of the heat dissipation portion 3. The existence of the through hole 36 enables the heat pipe 35 to have a "chimney effect". The heat dissipated by the heat dissipation portion 3 and the structure of the heat pipe 35 can accelerate the flow of air around the heat dissipation portion 3, thereby further improving the rapid heat dissipation capability of the heat dissipation portion 3.

[0067] Ship Example:

[0068] like Fig.12As shown, the ship of this embodiment includes an upper body 6 mainly constructed of a first metal substrate 1 and a lower body 7 mainly constructed of a second metal substrate 2, and the upper body 6 and the lower body 7 are at least partially welded and connected by a dissimilar metal substrate welding profile for shipbuilding according to any of the above embodiments. In this embodiment, the first metal substrate 1 is an aluminum alloy substrate, and the second metal substrate 2 is a steel substrate. The ship of this embodiment has the corresponding technical effect because it has the dissimilar metal substrate welding profile for shipbuilding according to any of the above embodiments, and will not be repeated here.

[0069] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A dissimilar metal substrate welding profile for shipbuilding, wherein the metal substrate comprises a first metal substrate (1) and a second metal substrate (2), wherein the first metal substrate (1) and the second metal substrate (2) are welded together, characterized in that: The thermal conductivity of the first metal substrate (1) is greater than the thermal conductivity of the second metal substrate (2), and the first metal substrate (1) is provided with a heat dissipation portion (3) for releasing welding heat when welding is performed based on the welding profile; or the first metal substrate (1) and the second metal substrate (2) are provided with a heat dissipation portion (3) for releasing welding heat when welding is performed based on the welding profile, one end of the heat dissipation portion (3) is connected to the metal substrate, and the other end is used to be connected to a welding object during welding.

2. The dissimilar metal base material welding profile for shipbuilding according to claim 1, characterized in that: The first metal substrate (1) and the second metal substrate (2) are connected by explosion welding, the heat dissipation portion (3) is welded to the metal substrate, and the heat dissipation portion (3) and the welded metal substrate are made of the same metal material.

3. The dissimilar metal base material welding profile for shipbuilding according to claim 1, characterized in that: The first metal substrate (1) and the second metal substrate (2) are connected by stir friction welding, the heat dissipation portion (3) and the metal substrate are integrally formed, and the heat dissipation portion (3) and the metal substrate to which they are welded are made of the same metal material.

4. The dissimilar metal base material welding profile for shipbuilding according to claim 2 or 3, characterized in that: The surface of the heat dissipation portion (3) is provided with heat dissipation patterns.

5. The dissimilar metal base material welding profile for shipbuilding according to claim 2 or 3, characterized in that: The heat dissipation portion (3) is provided with heat dissipation holes (31) and / or heat dissipation grooves (32).

6. The dissimilar metal base material welding profile for shipbuilding according to claim 2 or 3, characterized in that: The surface of the heat dissipation portion (3) is provided with heat dissipation fins (33).

7. The dissimilar metal base material welding profile for shipbuilding according to claim 6, characterized in that: The heat dissipation fins (33) are arranged in parallel or in a cross-shaped staggered arrangement.

8. The dissimilar metal base material welding profile for shipbuilding according to claim 7, characterized in that: An interface (34) for mounting an active radiator (4) is formed between the heat dissipation fins (33).

9. The dissimilar metal base material welding profile for shipbuilding according to claim 8, characterized in that: The interface (34) is a sliding groove that facilitates the sliding of the active radiator (4).

10. The dissimilar metal base material welding profile for shipbuilding according to claim 2 or 3, characterized in that: A heat dissipation pipe (35) is provided on the surface of the heat dissipation portion (3).

11. The dissimilar metal base material welding profile for shipbuilding according to claim 8, characterized in that: One end of the heat dissipation pipe (35) connected to the surface of the heat dissipation portion (3) is provided with a through hole (36) communicating with the inner hole of the heat dissipation pipe (35).

12. The dissimilar metal base material welding profile for shipbuilding according to any one of claims 1 to 3, characterized in that: The first metal substrate (1) is an aluminum alloy substrate, and the second metal substrate (2) is a steel substrate.

13. The dissimilar metal base material welding profile for shipbuilding according to any one of claims 1 to 3, characterized in that: The first metal substrate (1) is an aluminum alloy substrate, and the second metal substrate (2) is a titanium substrate.

14. The dissimilar metal base material welding profile for shipbuilding according to claim 12, characterized in that: A welding auxiliary layer (5) is provided between the first metal substrate (1) and the second metal substrate (2).

15. The dissimilar metal base material welding profile for shipbuilding according to claim 13, characterized in that: A welding auxiliary layer (5) is provided between the first metal substrate (1) and the second metal substrate (2).

16. A ship, comprising an upper body (6) mainly constructed of a first metal substrate (1) and a lower body (7) mainly constructed of a second metal substrate (2), characterized in that: The upper body (6) and the lower body (7) are at least partially connected by welding via the dissimilar metal base material welding profile for shipbuilding according to any one of claims 1 to 15.

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