Connecting method for ceramic ball reinforced metal matrix composite plates

Abstract

The invention discloses a method for connecting ceramic ball reinforced metal matrix composite plates, which is characterized by comprising the following steps of: 1, manufacturing a mold which can be used for producing the ceramic ball reinforced metal matrix composite plates with splicable edge structures, and producing the ceramic ball reinforced metal matrix composite plates by using the mold; secondly, the ceramic ball reinforced metal matrix composite plates needing to be connected are spliced according to the corresponding edge structures; and thirdly, the splicing seams are welded through the welding technology. The method has the advantages that a concave-convex structure splicing and welding composite connection process is adopted, so that the connection strength between the ceramic ball reinforced metal matrix composite plates is ensured; and the connecting part is still of a ceramic ball reinforced metal matrix composite structure, so that the anti-explosion and anti-impact performance of the material is ensured not to be reduced.

Description

Technical Field

[0001] The invention relates to a connection method of a ceramic ball reinforced metal matrix composite material, belonging to the field of metal composite materials. Background Art

[0002] High-performance ceramic ball reinforced metal matrix composite materials are composite materials made of high-strength ceramic balls such as Al2O3, SiC, B4C, ZrO2 as reinforcements and high-toughness metal materials such as aluminum-based, iron-based, titanium-based alloys as the matrix. They have excellent wear resistance, cutting resistance, explosion resistance, and impact resistance, and can be made into protective plates for safes, vehicles, ships, lifeboats and other equipment.

[0003] Ceramic ball reinforced metal matrix composite sheet generally needs to be manufactured by casting process, the size of the sheet is limited, and it is impossible to obtain large-area sheet through calendering process like metal sheet, so if it is used in large area, reliable sheet connection technology is required. However, due to the high volume fraction of ceramic balls in ceramic ball reinforced metal matrix composite sheet, its cutting performance deteriorates and the cutting processing cost increases; in addition, the presence of ceramic balls will reduce the strength of the welded joint, and the simple welding process cannot guarantee the reliability of its connection; and simple mechanical connections such as hinges, slots, and rivets will greatly reduce the performance of the joint. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a reliable method for connecting ceramic ball reinforced metal matrix composite material plates in view of the above technical status.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a method for connecting ceramic ball reinforced metal matrix composite material plates, characterized by comprising:

[0006] Step 1: making a mold, wherein the mold can produce a ceramic ball reinforced metal matrix composite material plate having a splicable edge structure, and using the mold to produce the ceramic ball reinforced metal matrix composite material plate;

[0007] Step 2: splicing the ceramic ball reinforced metal matrix composite material plates to be connected according to the corresponding edge structures;

[0008] Step 3: Use welding technology to weld the splicing seams.

[0009] The splicable edge structure enables the ceramic ball reinforced metal matrix composite material plates to be spliced ​​together in pairs to form a complete connection structure, and has a certain mechanical connection strength. Preferably, the splicable edge structure is a tooth-like structure with a tooth groove between two adjacent teeth.

[0010] Preferably, the teeth match the tooth grooves.

[0011] The number, shape and size of the teeth and tooth grooves are not limited and can be changed as needed. Preferably, the width of the base of the teeth connected to the main body of the ceramic ball reinforced metal matrix composite material plate is smaller than the width of the end of the tooth opposite to the base; the width of the notch of the tooth groove is smaller than the groove bottom width of the tooth groove. Under this structure, the two-by-two spliced ​​plates are not easy to separate.

[0012] Preferably, the ceramic ball reinforced metal matrix composite material plate can be spliced ​​with another ceramic ball reinforced metal matrix composite material plate with the same edge structure, so that the edge structure of the plate can be spliced ​​cyclically to obtain an infinitely large plate.

[0013] Preferably, when performing the step 2, the ceramic ball reinforced metal matrix composite material plates to be connected are spliced ​​horizontally or vertically. Horizontal splicing forms a plate with a larger area, while vertical splicing forms a box or other three-dimensional structure. In addition to these two splicing methods, other splicing methods can also be used.

[0014] Preferably, the ceramic balls are high-strength ceramic balls such as oxides, carbides, or nitrides, and the matrix of the ceramic ball reinforced metal matrix composite material plate is a metal such as iron-based metal, aluminum-based metal, titanium-based metal or copper-based metal, but is not limited to the above types of metals.

[0015] Since the ceramic ball reinforced metal matrix composite material sheet has a large thickness, the welding technology can be laser welding, electron beam welding, stir friction welding, MIG welding, TIG welding and other welding technologies with large penetration depth. As a preferred method, laser welding or electron beam welding is used in step three, which has a large welding thickness, a small heat-affected zone, and no beveling is required. As another optional solution, when performing step one, the mold is changed so that the ceramic ball reinforced metal matrix composite material sheet produced has a welding bevel, and MIG welding or TIG welding is used in step three. By changing the mold to directly cast the welding bevel, subsequent additional operations are reduced.

[0016] Preferably, in step 1, a casting process is used to produce the ceramic ball reinforced metal matrix composite material plate. The good fluidity of the molten metal in the casting process can ensure that the special edge structure can be fully realized.

[0017] Compared with the prior art, the advantages of the present invention are: (1) the composite connection process of splicing + welding ensures the connection strength between the ceramic ball reinforced metal matrix composite material plates; (2) the connection part is still a ceramic ball reinforced metal matrix composite structure, ensuring that the explosion-proof and impact-proof performance of the material is not reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the edge structure of Example 1 of the present invention;

[0019] Figure 2 This is a schematic diagram of the edge structure of Example 2 of the present invention. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below with reference to the accompanying drawings.

[0021] Example 1

[0022] The method for connecting ceramic ball reinforced metal matrix composite material plates of this embodiment includes the following steps: firstly, making a mold, and using the mold to produce the ceramic ball reinforced metal matrix composite material plates.

[0023] The ceramic balls are high-strength ceramic balls such as oxides, carbides, or nitrides. The matrix of the ceramic ball reinforced metal matrix composite material plate is a metal such as iron-based metal, aluminum-based metal, titanium-based metal or copper-based metal, but is not limited to the above types of metals.

[0024] The production is carried out through a casting process, and the output plate is an Al2O3 ceramic ball reinforced iron-based composite plate, such as Figure 1 As shown, the overall outer edge size is 240mm*240mm, the thickness is 20mm, the edge structure is a toothed structure, there is a tooth groove between two adjacent teeth, and the teeth match the tooth grooves.

[0025] The width of the base of the tooth connected to the main body of the ceramic ball reinforced metal matrix composite material plate is smaller than the width of the end of the tooth opposite to the base; the width of the notch of the tooth groove is smaller than the width of the groove bottom of the tooth groove. Under this structure, the plates can be spliced ​​in pairs and are not easy to separate.

[0026] Preferably, when making the mold, care is taken to ensure that the ceramic ball reinforced metal matrix composite material plate produced can be spliced ​​with another ceramic ball reinforced metal matrix composite material plate with the same edge structure, so that the edge structure of the plate can be spliced ​​in a loop to obtain an infinitely large plate.

[0027] Then, the second step is to splice the ceramic ball reinforced metal matrix composite material plates to be connected according to the corresponding edge structure. In this embodiment, the splicing is horizontal, and multiple ceramic ball reinforced metal matrix composite material plates are spliced ​​into a plate with a larger area.

[0028] Finally, in the third step, the joint seams are welded using welding technology. In this embodiment, laser welding technology is used to weld the joint seams to obtain a large Al2O3 ceramic ball reinforced iron-based composite material plate, and the tensile strength and bending strength of the joint are similar to the strength of the material itself.

[0029] In addition to laser welding, considering the large thickness of the ceramic ball reinforced metal matrix composite sheet, the welding technology can also use electron beam welding, stir friction welding, MIG welding, TIG welding and other welding technologies with large penetration depth. Laser welding and electron beam welding have large welding thickness, small heat-affected zone, and no need to open grooves. When using welding technologies such as MIG welding or TIG welding that require welding grooves, the mold can also be changed in the first step so that the ceramic ball reinforced metal matrix composite sheet produced has a welding groove directly, reducing subsequent additional operations.

[0030] Example 2

[0031] The difference between this embodiment and embodiment 1 is that the mold of this embodiment produces SiC ceramic ball reinforced aluminum-based composite material plates, the overall outer edge size is 240mm*240mm, the thickness is 20mm, the width of the teeth does not widen with extension, and the tooth grooves are the same width from the groove mouth to the groove bottom. When splicing, 6 SiC ceramic ball reinforced aluminum-based composite material plates are selected and vertically spliced ​​into a box, and then the seams are laser welded. The box has good anti-cutting and anti-impact properties.

Claims

1. A method for connecting ceramic ball reinforced metal matrix composite material plates, characterized in that: include: Step 1: making a mold, wherein the mold can produce a ceramic ball reinforced metal matrix composite material plate having a splicable edge structure, and using the mold to produce the ceramic ball reinforced metal matrix composite material plate; Step 2: splicing the ceramic ball reinforced metal matrix composite material plates to be connected according to the corresponding edge structures; Step 3: Use welding technology to weld the splicing seams.

2. The connection method according to claim 1, characterized in that: The splicable edge structure is a tooth-shaped structure, and a tooth groove is provided between two adjacent teeth.

3. The connection method according to claim 2, characterized in that: The teeth match the tooth grooves.

4. The connection method according to claim 3, characterized in that: The width of the base of the tooth connected to the main body of the ceramic ball reinforced metal matrix composite material plate is smaller than the width of the end of the tooth opposite to the base; the width of the notch of the tooth groove is smaller than the groove bottom width of the tooth groove.

5. The connection method according to any one of claims 1 to 4, characterized in that: The ceramic ball reinforced metal matrix composite material plate can be spliced ​​with another ceramic ball reinforced metal matrix composite material plate with the same edge structure.

6. The connection method according to claim 1, characterized in that: When performing the step 2, the ceramic ball reinforced metal matrix composite material plates to be connected are spliced ​​horizontally or vertically.

7. The connection method according to claim 1, characterized in that: The ceramic balls are oxide, carbide or nitride ceramic balls, and the matrix of the ceramic ball reinforced metal matrix composite material plate is iron-based metal, aluminum-based metal, titanium-based metal or copper-based metal.

8. The connection method according to claim 1, characterized in that: When performing step three, laser welding or electron beam welding is used.

9. The connection method according to claim 1, characterized in that: When performing step one, the mold is changed so that the ceramic ball reinforced metal matrix composite material plate produced has a welding groove, and when performing step three, MIG welding or TIG welding is adopted.

10. The connection method according to claim 1, characterized in that: When performing step 1, a casting process is adopted to produce a ceramic ball reinforced metal matrix composite material plate.

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