An intermediate damascene metal composite and a method of making the same
By setting an inlay layer in the metal composite material and using a nickel alloy with a specific composition, combined with hot rolling and cold rolling processes, the problems of bulky structure and uneven bonding strength of metal composite materials were solved, and a high-strength and stable composite material was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- FOSHAN TONGBAO ELECTRICAL PRECISION ALLOY CO LTD
- Filing Date
- 2026-04-23
- Publication Date
- 2026-07-14
AI Technical Summary
Existing metal composite materials are structurally bulky, which limits their application scenarios. Furthermore, their welding strength is uneven, and defects such as impurities and porosity exist at the bonding interface.
The preparation method of the intermediate embedded metal composite material involves setting an embedded layer between the first base layer and the second base layer. The length direction of the embedded layer is parallel to the base layer. The base layer has grooves to accommodate the embedded layer. The sandwich structure is formed by hot rolling and cold rolling processes. The embedded layer material is a nickel alloy with a specific composition to improve the bonding strength.
It achieves structural simplification of metal composite materials, enhances conductivity or reduces weight, while improving bonding strength and stability, and avoids interlayer delamination and the formation of brittle interfacial inclusions.
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Figure CN122379115A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of metallic materials, and in particular to an intercalated metallic composite material and its preparation method. Background Technology
[0002] To improve the performance of metallic materials, multiple layers of metal are often firmly bonded together along the contact surface to obtain composite materials. These composite materials can be used to improve the electrical conductivity, corrosion resistance, or structural strength of metallic materials and can be widely used in industries such as electronics, electrical engineering, and new energy.
[0003] Multilayer metal composite methods include solid-solid composite, solid-liquid composite, and liquid-liquid composite methods, with solid-solid composite being the most typical due to its relatively simple process and low equipment requirements, making it widely used in mass production. Solid-solid composite methods mainly include rolling composite and explosive welding composite. While explosive welding composite has lower costs, it is prone to uneven weld strength and defects such as impurities and porosity at the bonding interface; therefore, rolling composite is more preferred.
[0004] Generally speaking, metal composite materials are a combination of the properties of various metal materials. Therefore, in order to improve the performance of metal composite materials, the number of metal layers will increase. However, this will make the metal composite materials appear bulky in structure and limit their application scenarios. Summary of the Invention
[0005] In order to simplify the structure of metal composite materials, this application provides an intermediate embedded metal composite material and a method for preparing the same.
[0006] Firstly, the technical solution provided in this application for an intermediate embedded metal composite material is as follows: An intermediate embedded metal composite material includes a first base layer, an embedded layer, and a second base layer arranged sequentially. The length direction of the embedded layer is parallel to the length directions of the first base layer and the second base layer. The first base layer has a first groove, and the embedded layer is disposed inside the first groove. The second base layer covers the first base layer and the embedded layer.
[0007] By adopting the above technical solution, another metal is added inside the metal composite material in the form of an inlay layer. Compared with the three-layer composite rolling with the first and second base layers of the same width, this method only needs to retain two composite layers, which is more streamlined in terms of layer structure. At the same time, the functional characteristics of the metal are also introduced. For example, the metal in the inlay layer can be a metal material with better conductivity to enhance the conductivity, or the metal in the inlay layer can be a lighter metal material to achieve the effect of weight reduction.
[0008] In addition, the inlay layer provides a contact surface between the first base layer and the second base layer. During the subsequent rolling of the metal composite material, the atoms of the inlay layer diffuse into each other with the first base layer and the second base layer, thereby improving the overall performance of the metal composite material while ensuring the interfacial bonding strength between the first base layer and the second base layer.
[0009] Optionally, the width of the first groove is 20-70% of the width of the first base layer, and the depth of the first groove is 20-60% of the thickness of the first base layer.
[0010] By adopting the above technical solution, this specific ratio ensures that the inlay layer has sufficient volume to exert a reinforcing effect, while guaranteeing that the first base layer retains sufficient structural strength and rolling deformation capacity after slotting. Slots that are too narrow or too shallow will weaken the inlay effect, while slots that are too wide or too deep will excessively weaken the base layer. This specific ratio achieves an optimized balance between the reinforcing effect and the integrity of the matrix, which is beneficial for obtaining metal composite materials with high bonding strength and resistance to cracking.
[0011] Optionally, multiple first slots are provided, and the cross-sectional shape of the first slot is square or trapezoidal.
[0012] By adopting the above technical solution, setting multiple grooves can further increase the mechanical interlocking area and interface diffusion channels between the inlay layer and the base layer, thereby improving the overall bonding strength more uniformly and significantly.
[0013] Trapezoidal grooves, with their wedge-shaped structure, generate lateral compressive stress during the rolling composite process, further enhancing the locking and positioning effect, preventing interlayer delamination, and strengthening the lateral bonding strength. Furthermore, compared to single-sided trapezoidal grooves, double-sided trapezoidal grooves result in a more aesthetically pleasing cross-sectional shape of the inlaid layer and facilitate atomic diffusion and bonding between bonding surfaces, thereby improving the bonding strength in the width direction.
[0014] Optionally, the second base layer has a second groove, which is symmetrically arranged with the first groove, and the inlay layer is disposed inside the first groove and the second groove.
[0015] By adopting the above technical solution, the inlay layer is simultaneously embedded in the symmetrical grooves of the upper and lower base layers, forming a more balanced sandwich composite structure. This structure enables a more uniform stress distribution during rolling deformation, reduces interfacial shear stress concentration caused by insufficient support on one side, and thus obtains a composite material with better isotropy and a more stable bonding interface.
[0016] Optionally, the materials of the first base layer and the second base layer each independently include one of pure copper, pure aluminum, steel, copper alloy, and steel alloy, and the material of the inlay layer includes one of pure copper, pure aluminum, pure nickel, copper alloy, aluminum alloy, and nickel alloy.
[0017] Optionally, when the material of the first base layer is steel alloy and the material of the second base layer is pure copper, the material of the inlay layer is nickel alloy, and the composition of the nickel alloy is 4.5-8.5 wt% cobalt, 3-6 wt% chromium, 1-2 wt% iron, 0.5-1 wt% manganese, 0.3-0.8 wt% silicon, 0.1-0.3 wt% vanadium and the balance is nickel.
[0018] By adopting the above technical solution, the nickel alloy containing the above specific components is suitable for rolling composites of steel alloy and pure copper. Chromium improves the plastic deformation capacity of the inlay layer itself during hot rolling, ensuring coordinated deformation of the inlay layer, steel alloy, and pure copper. The small amount of iron in the nickel alloy can reduce the atomic interdiffusion barrier between nickel and steel, promoting a strong bond at the interface. Manganese and silicon purify the alloy and reduce the formation of brittle inclusions at the interface. Vanadium can fix carbon diffusing from the steel side. The nickel alloy undergoes efficient interdiffusion with iron and copper atoms, forming a solid solution layer with a compositional gradient at the interface, effectively preventing the direct formation of brittle iron-copper intermetallic compounds, reducing interfacial stress, thereby improving the bonding strength and stability of the metal composite material.
[0019] Secondly, the preparation method of the intermediate embedded metal composite material provided in this application adopts the following technical solution: A method for preparing an intercalated metal composite material includes the following steps: A first groove is formed on the surface of the first strip, and the first strip, the inlaid strip and the second strip are constrained in sequence, so that the inlaid strip is located inside the first groove, and the second strip is in contact with and attached to the surfaces of the first strip and the inlaid strip. The first strip, the inlaid strip, and the second strip are heated online respectively, and after reaching the predetermined temperature, they are hot-rolled to obtain a composite strip. The composite strip is annealed and cold rolled to form an effective integrated whole consisting of the first base layer, the inlay layer, and the second base layer, resulting in an intermediate inlaid metal composite material.
[0020] By adopting the above technical solution, the three strips are first constrained and positioned, and then heated and hot rolled online respectively, so that each layer enters the rolling mill at the optimal temperature, promoting atomic diffusion. The subsequent annealing and cold rolling processes can eliminate internal stress and densify the structure, thereby stably obtaining high-strength and high-performance composite materials.
[0021] Optionally, when the first strip is a steel alloy, the second strip is pure copper, and the inlaid strip is a nickel alloy, the predetermined online heating temperature of the first strip is 800-950℃, the predetermined online heating temperature of the inlaid strip is 900-1050℃, the predetermined online heating temperature of the second strip is 550-700℃, the hot rolling composite temperature is 750-850℃, the hot rolling speed is 3-10m / min, and the composite deformation is 25-45%.
[0022] By adopting the above technical solution, different online heating temperatures are set according to the metal composite structure, and appropriate hot rolling temperature and speed are controlled to ensure the plastic flow capability of the three-layer metal during rolling, generate sufficient plastic deformation and atomic diffusion at the interface, and avoid excessive oxidation or harmful phase formation due to excessive temperature.
[0023] Optionally, the annealing temperature is 800-950℃, the annealing speed is 1-6m / min, the rolling amount per cold rolling pass is 10-25%, and the total deformation of cold rolling is 20-75%.
[0024] By adopting the above technical solutions, the work hardening after hot rolling is completely eliminated, and the further diffusion and homogenization of atoms at the interface are promoted. Cold rolling with a large amount of deformation can refine the grains, improve the strength of the material, and densify the composite material.
[0025] Optionally, the preparation method further includes the following steps: A second groove is opened on the surface of the second strip so that the inlaid strip is located inside the second groove.
[0026] In summary, this application has the following beneficial effects: 1. This application incorporates another metal into the metal composite material in the form of an inlay layer. Compared with the three-layer composite rolling with the first and second base layers of the same width, this method only requires two layers of composite structure, which is more streamlined in terms of layer structure. At the same time, it also introduces the functional characteristics of the metal. For example, the metal in the inlay layer can be a metal material with better conductivity to enhance the conductivity, or the metal in the inlay layer can be a lighter metal material to achieve the effect of weight reduction.
[0027] 2. The inlay layer in this application can be a trapezoidal groove. The trapezoidal groove, with its wedge-shaped structure, generates lateral compressive stress during the rolling composite process, further enhancing the locking effect, preventing interlayer peeling, and strengthening the lateral bonding strength. Furthermore, compared to a single-sided trapezoidal groove, a double-sided trapezoidal groove allows for a more aesthetically pleasing cross-sectional shape of the inlay layer and facilitates the diffusion and bonding of atoms between the bonding surfaces, thus improving the bonding strength in the width direction.
[0028] 3. This application uses a nickel alloy with a specific composition as an insert layer, suitable for rolling composites of steel alloys and pure copper. Chromium enhances the plastic deformation capacity of the insert layer itself during hot rolling, ensuring coordinated deformation of the insert layer, steel alloy, and pure copper. A small amount of iron in the nickel alloy reduces the atomic interdiffusion barrier between nickel and steel, promoting a strong bond at the interface. Manganese and silicon purify the alloy and reduce the formation of brittle inclusions at the interface. Vanadium can fix carbon diffusing from the steel side. The nickel alloy undergoes efficient interdiffusion with iron and copper atoms, forming a solid solution layer with a compositional gradient at the interface, effectively preventing the direct formation of brittle iron-copper intermetallic compounds, reducing interfacial stress, thereby improving the bonding strength and stability of the metal composite material. Attached Figure Description
[0029] Figure 1 This is a cross-sectional structural diagram of Example 1 of the metal composite material inlaid in the middle of this application.
[0030] Figure 2 This is a cross-sectional structural diagram of Example 2 of the metal composite material inlaid in the middle of this application.
[0031] Figure 3 This is a cross-sectional structural diagram of Example 3 of the metal composite material inlaid in the middle of this application.
[0032] Explanation of reference numerals in the attached figures: 1. First base layer; 11. First groove; 2. Second base layer; 21. Second groove; 3. Inlay layer. Detailed Implementation
[0033] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.
[0034]
Example 1
[0035] The thickness of the first base layer is 10mm, the thickness of the second base layer is 10mm, the width of the first groove is 20% of the width of the first base layer, and the depth of the first groove is 60% of the thickness of the first base layer. There is one first groove, and the cross-sectional shape of the first groove is square.
[0036] The first base layer is made of 430 stainless steel, the second base layer is made of T2 copper, and the inlay layer is made of 1050 aluminum.
[0037] A method for preparing an intercalated metal composite material includes the following steps: A first groove is made on the surface of the first strip by mechanical cutting. The first strip, the inlaid strip, and the second strip are cleaned. The first strip, the inlaid strip, and the second strip are constrained in sequence so that the inlaid strip is located inside the first groove. The second strip is in surface contact with the first strip and the inlaid strip. The first strip is 430 stainless steel strip, the second strip is T2 copper strip, and the inlaid strip is 1050 aluminum strip.
[0038] The first strip, the inlaid strip, and the second strip are heated online respectively. After reaching the predetermined temperature, they are put into the rolling mill for hot rolling composite. The predetermined online heating temperature of the first strip is 800℃, the predetermined online heating temperature of the inlaid strip is 900℃, the predetermined online heating temperature of the second strip is 550℃, the hot rolling composite temperature is 750℃, the hot rolling speed is 3m / min, and the composite deformation is 25%, resulting in a composite strip.
[0039] The composite strip is annealed and cold rolled at a temperature of 800℃ and a speed of 1m / min. The rolling amount per cold rolling pass is 10%, and the total deformation of cold rolling is 20%, forming a first base layer, an inlay layer, and a second base layer, thus obtaining an intermediate inlaid metal composite material.
[0040]
Example 2
[0041] The thickness of the first base layer is 5mm, the thickness of the second base layer is 5mm, the width of the first groove is 70% of the width of the first base layer, and the depth of the first groove is 20% of the thickness of the first base layer. There is one first groove, and the cross-sectional shape of the first groove is trapezoidal.
[0042] The width of the second groove is 70% of the width of the second base layer, and the depth of the second groove is 20% of the thickness of the second base layer. There is one second groove, and the cross-sectional shape of the second groove is trapezoidal.
[0043] The first base layer is made of 430 stainless steel, the second base layer is made of T2 copper, and the inlay layer is made of 1050 aluminum.
[0044] A method for preparing an intercalated metal composite material includes the following steps: A first groove is made on the surface of the first strip by mechanical cutting. The first strip, the inlaid strip, and the second strip are cleaned. The first strip, the inlaid strip, and the second strip are constrained in sequence so that the inlaid strip is located inside the first groove. The second strip is in surface contact with the first strip and the inlaid strip. The first strip is 430 stainless steel strip, the second strip is T2 copper strip, and the inlaid strip is 1050 aluminum strip.
[0045] The first strip, the inlaid strip, and the second strip are heated online respectively. After reaching the predetermined temperature, they are put into the rolling mill for hot rolling composite. The predetermined online heating temperature of the first strip is 950℃, the predetermined online heating temperature of the inlaid strip is 1050℃, the predetermined online heating temperature of the second strip is 700℃, the hot rolling composite temperature is 850℃, the hot rolling speed is 10m / min, and the composite deformation is 45%, resulting in a composite strip.
[0046] The composite strip is annealed and cold rolled at a temperature of 950℃ and a speed of 6m / min. The rolling amount per pass is 25%, and the total deformation of the cold rolling is 50%, forming a first base layer, an inlay layer, and a second base layer, thus obtaining an intermediate inlaid metal composite material.
[0047]
Example 3
[0048] like Figure 3 As shown, the thickness of the first base layer is 10mm, the thickness of the second base layer is 10mm, the width of the first groove is 20% of the width of the first base layer, and the depth of the first groove is 60% of the thickness of the first base layer. Two first grooves 11 are provided, distributed along the width direction of the composite material, and the cross-sectional shape of the first groove 11 is square.
[0049]
Example 4
[0050] The composition of the nickel alloy is: 4.5wt% cobalt, 3wt% chromium, 2wt% iron, 1wt% manganese, 0.3wt% silicon, 0.1wt% vanadium, and the balance being nickel.
[0051]
Example 5
[0052] The composition of the nickel alloy is: 8.5 wt% cobalt, 6 wt% chromium, 1 wt% iron, 0.5 wt% manganese, 0.8 wt% silicon, 0.3 wt% vanadium, and the balance being nickel.
[0053]
Example 6
[0054] The nickel alloy has the following composition: 3 wt% cobalt, 9 wt% chromium, 3.5 wt% iron, 0.5 wt% manganese, 0.8 wt% silicon, 0.3 wt% vanadium, and the balance being nickel.
[0055]
Example 7
[0056] The nickel alloy has the following composition: 8.5 wt% cobalt, 6 wt% chromium, 0.4 wt% iron, 1.5 wt% manganese, 0.1 wt% silicon, 0.6 wt% vanadium, and the balance being nickel.
[0057]
Example 8
[0058] Performance testing experiment Bonding strength: The intermediate inlaid metal composite materials prepared in Examples 1-8 were cut as samples. Twenty sets of samples were taken for each example. The samples were clamped with a bench vise and a wrench and two tests were performed. The first test was to bend the sample at 90° along the axis perpendicular to the length of the sample, and repeatedly bend it until it broke. The cross-section of the sample was observed for any visible delamination, and the percentage of samples with delamination was recorded. The second test was to bend the sample along the axis parallel to the length of the sample and along the edge of the inlaid layer without breaking the sample. The end face of the sample was observed for any visible delamination, and the percentage of samples with delamination was recorded.
[0059] Cyclic stability: The sample is placed in a cyclic test chamber and cyclicated 30 times at 20-350℃ with a heating and cooling rate of 5℃ / min. After the cycle, the bonding strength is tested.
[0060] The test results are shown in Table 1.
[0061] Table 1
[0062] Examples 1-8 all involve two-layer metal composite materials with an inlay in the middle. A third metal is introduced into the middle of the metal composite material to maintain the two-layer structure, which improves the performance of the metal composite material and does not result in a bulky three-layer metal structure.
[0063] Based on the analysis in Table 1, compared with Examples 3-7, in both conventional and cyclic scenarios, the proportion of the two test layers in Examples 4-5 is smaller. This shows that using a nickel alloy formulated with specific components as an inlay layer can effectively improve the bonding strength and structural stability of metal composite materials, withstand fatigue damage caused by thermal cycling, and thus be suitable for more demanding scenarios.
[0064] Compared with Example 8, Example 3 shows that online heating of the three strips at different temperatures before hot rolling helps to further improve the bonding strength and structural stability of the metal composite material.
[0065] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this specific embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.
Claims
1. A composite material with an intercalated metal core, characterized in that: It includes a first base layer, an inlay layer, and a second base layer arranged sequentially. The length direction of the inlay layer is parallel to the length directions of the first base layer and the second base layer. The first base layer has a first groove, and the inlay layer is disposed inside the first groove. The second base layer covers the first base layer and the inlay layer.
2. The intermediate inlaid metal composite material according to claim 1, characterized in that: The width of the first groove is 20-70% of the width of the first base layer, and the depth of the first groove is 20-60% of the thickness of the first base layer.
3. The intermediate inlaid metal composite material according to claim 1, characterized in that: The first groove is provided in multiple ways, and the cross-sectional shape of the first groove is square or trapezoidal.
4. The intermediate inlaid metal composite material according to claim 1, characterized in that: The second base layer has a second groove, which is symmetrically arranged with the first groove, and the inlay layer is disposed inside the first groove and the second groove.
5. The intermediate inlaid metal composite material according to claim 1, characterized in that: The materials of the first base layer and the second base layer each independently include one of pure copper, pure aluminum, steel, copper alloy, and steel alloy, and the material of the inlay layer includes one of pure copper, pure aluminum, pure nickel, copper alloy, aluminum alloy, and nickel alloy.
6. The intermediate inlaid metal composite material according to claim 1, characterized in that: When the material of the first base layer is steel alloy and the material of the second base layer is pure copper, the material of the inlay layer is nickel alloy, and the composition of the nickel alloy is 4.5-8.5wt% cobalt, 3-6wt% chromium, 1-2wt% iron, 0.5-1wt% manganese, 0.3-0.8wt% silicon, 0.1-0.3wt% vanadium and the balance is nickel.
7. A method for preparing an intermediate embedded metal composite material according to any one of claims 1-6, characterized in that: Includes the following steps: A first groove is formed on the surface of the first strip, and the first strip, the inlaid strip and the second strip are constrained in sequence, so that the inlaid strip is located inside the first groove, and the second strip is in contact with and attached to the surfaces of the first strip and the inlaid strip. The first strip, the inlaid strip, and the second strip are heated online respectively, and after reaching the predetermined temperature, they are hot-rolled to obtain a composite strip. The composite strip is annealed and cold rolled to form a first base layer, an inlay layer, and a second base layer, resulting in an intermediate inlay metal composite material.
8. The method for preparing an intermediate embedded metal composite material according to claim 7, characterized in that: When the first strip is a steel alloy, the second strip is pure copper, and the inlaid strip is a nickel alloy, the predetermined online heating temperature of the first strip is 800-950℃, the predetermined online heating temperature of the inlaid strip is 900-1050℃, the predetermined online heating temperature of the second strip is 550-700℃, the hot rolling composite temperature is 750-850℃, the hot rolling speed is 3-10m / min, and the composite deformation is 25-45%.
9. The method for preparing an intermediate embedded metal composite material according to claim 7, characterized in that: The annealing temperature is 800-950℃, the annealing speed is 1-6m / min, the rolling amount per cold rolling pass is 10-25%, and the total deformation of cold rolling is 20-75%.
10. The method for preparing an intermediate embedded metal composite material according to claim 7, characterized in that: It also includes the following steps: A second groove is opened on the surface of the second strip so that the inlaid strip is located inside the second groove.