Preparation process of amorphous alloy multilayer composite material

Abstract

The invention discloses a preparation process of an amorphous alloy multilayer composite material, and belongs to the field of amorphous alloy materials. A preparation technology of an amorphous alloy multilayer composite material comprises the following steps that S10, a plurality of single-layer amorphous alloy belts are continuously stacked to form a multilayer composite belt material, and the space between every two adjacent amorphous alloy belts is coated with an adhesive; s20, the composite strip is preheated, so that the fluidity of the adhesive is improved, and the composite strip is pressed in the preheating process; and S30, the composite strip is cured, the curing temperature is higher than the preheating temperature, cooling is conducted after curing, and the amorphous alloy multi-layer composite material is prepared. The method has the effect of improving the processing performance of the amorphous alloy.

Description

Technical Field

[0001] The present application relates to the field of amorphous alloy materials, and in particular to a process for preparing an amorphous alloy multilayer composite material. Background Art

[0002] Traditional motors mainly use silicon steel sheets as core materials. Although silicon steel sheets have good magnetic properties and processing performance, they have high hysteresis loss and eddy current loss, especially under high-frequency conditions. In recent years, amorphous alloys, as a new type of soft magnetic material, have gradually shown great application potential in the field of motors due to their excellent properties such as low loss, high magnetic permeability, and corrosion resistance.

[0003] Amorphous alloys are formed by rapid cooling and solidification of metals. When the alloy solidifies, the atoms do not have time to arrange themselves in order and crystallize. The resulting solid alloy has a long-range disordered structure and does not have the grains and grain boundaries of crystalline alloys. Therefore, it is superior to silicon steel sheets in terms of magnetic permeability, excitation current and iron loss.

[0004] However, thinness, hardness and brittleness are the inherent physical properties of amorphous alloys, that is, the processing performance of amorphous alloys is poor. Traditional silicon steel sheets can be processed by stamping, but the thinness, hardness and brittleness make it difficult to process amorphous alloys by stamping. Therefore, amorphous alloys are currently more often processed by wire cutting. However, the processing efficiency of wire cutting is not as good as stamping, and the loss is relatively large, which limits the application of amorphous alloys. Summary of the invention

[0005] In order to improve the processing performance of amorphous alloys, the present application provides a process for preparing an amorphous alloy multilayer composite material.

[0006] The present application provides a process for preparing an amorphous alloy multilayer composite material using the following technical solution: A process for preparing an amorphous alloy multilayer composite material comprises the following steps: S10. stacking a plurality of single-layer amorphous alloy strips successively to form a multi-layer composite strip, wherein an adhesive is applied between adjacent amorphous alloy strips; S20. Preheating the composite strip to improve the fluidity of the adhesive, and compacting the composite strip during the preheating process; S30. Ripening the composite strip at a temperature higher than the preheating temperature, and cooling after aging to obtain an amorphous alloy multilayer composite material.

[0007] By adopting the above technical solution, the thickness of the laminated composite strip is increased, and the bonding of each layer of amorphous alloy strip is strengthened by the adhesive. The external stress can be transmitted to each layer of amorphous alloy strip and dispersed, thereby obtaining a composite strip with stronger toughness, so that the processing performance of the amorphous alloy composite strip is better and can withstand the stamping process.

[0008] The continuous lamination refers to the lamination of a single-layer amorphous alloy ribbon with a single-layer amorphous alloy ribbon to obtain a double-layer amorphous alloy ribbon, and then the obtained double-layer amorphous alloy ribbon is laminated with another single-layer amorphous alloy ribbon to obtain a three-layer amorphous alloy ribbon, and so on and so forth to obtain a multi-layer composite ribbon. The continuous lamination method allows the interface of each layer of amorphous alloy ribbon to fully contact the adhesive, and the adhesive produces good adhesion after aging, thereby improving the interlayer bonding strength and the structural stability of the composite ribbon.

[0009] The composite strip is preheated before aging. Preheating improves the fluidity of the adhesive and improves the dispersion uniformity. Combined with the compression of the composite strip, the bubbles between the layers of amorphous alloy strips are discharged while the adhesive is flowing, reducing the gaps between the layers of amorphous alloy strips, improving the flatness of the composite strip, and appropriately eliminating the uneven thickness.

[0010] Optionally, in S20, the preheating process includes vacuum heat sealing, and the vacuum heat sealing method is that the composite strip passes through a vacuum environment with a heating source, and the composite strip is rolled and compacted during the vacuum heat sealing process.

[0011] By adopting the above technical solution, the composite strip is extruded in a vacuum environment and then compacted by multiple mechanisms in a rolling manner, which helps to expel bubbles between the layers of amorphous alloy strips and make the interfaces of each layer of amorphous alloy strips further fully contact with the adhesive, thereby improving the stability and thickness uniformity of the composite strip.

[0012] Optionally, in S20, the preheating process further includes induction heating, wherein the induction heating is performed before the vacuum heat sealing. By adopting the above technical scheme, the predetermined temperature is reached before vacuum heat sealing, so that the adhesive has good fluidity in the early stage of vacuum heat sealing, and the adhesive is evenly dispersed with the extrusion in the vacuum environment. At the same time, induction heating makes the amorphous alloy strip heat up quickly and more energy-efficient, thereby quickly reaching the predetermined preheating temperature.

[0013] Optionally, in S20, the terminal temperature of the composite strip during the induction heating process is 90-110° C.; the temperature of vacuum heat sealing is 90-110° C., and the duration of vacuum heat sealing is 3-15 s.

[0014] By adopting the above technical solution, the temperature reaches 90~110℃, the fluidity of the adhesive is the best, which helps to discharge the bubbles inside the composite strip.

[0015] Optionally, in S30, the aging temperature is 180-200° C., and the aging duration is 2-4 min.

[0016] By adopting the above technical solution, full ripening is achieved and the overall stability of the composite strip is enhanced.

[0017] Optionally, in S10, the plurality of amorphous alloy strips are successively stacked in such a manner that a previous amorphous alloy strip is conveyed forward, a subsequent amorphous alloy strip is coated with adhesive on one side and then approaches the previous amorphous alloy strip, the previous amorphous alloy strip and the subsequent amorphous alloy strip are stacked and bonded together by rolling and then conveyed forward, and the above steps are repeated to obtain a multi-layer composite strip.

[0018] By adopting the above technical solution, the strips are stacked one by one, so that the interface of each layer of amorphous alloy strip is fully in contact with the adhesive. The composite strip maintains good stability during the preheating and aging process and is not prone to dislocation or wrinkles.

[0019] Optionally, before the previous amorphous alloy strip is bonded to the next amorphous alloy strip, both the previous amorphous alloy strip and the next amorphous alloy strip pass through a tension detector. If the speeds of the previous amorphous alloy strip and the next amorphous alloy strip are different, the tension detector is used to adjust the speeds of the previous amorphous alloy strip and the next amorphous alloy strip to be the same.

[0020] By adopting the above technical solution, the composite process of the previous amorphous alloy strip and the next amorphous alloy strip can be further regulated to maintain synchronous composite and improve the thickness uniformity of the composite strip.

[0021] Optionally, the amorphous alloy ribbon is obtained by unwinding an amorphous alloy coil, and the amorphous alloy coils are distributed according to the forward direction of the amorphous alloy ribbon.

[0022] By adopting the above technical solution, fast and continuous conveying of different amorphous alloy strips can be achieved.

[0023] Optionally, the adhesive is a two-component solvent-free adhesive.

[0024] By adopting the above technical solution, the two-component solvent-free adhesive has a short curing time, high bonding strength after ripening, and when heated to 90-110°C, the viscosity is reduced and the fluidity is enhanced.

[0025] Optionally, S30 and later also include S40; S40. Rolling and cutting the amorphous alloy multilayer composite material.

[0026] Optionally, S11 is included between S10 and S20, and S31 is included between S30 and S40; S11. The composite strip enters the first storage area; S31. The composite strip enters the second material storage area.

[0027] By adopting the above technical solution, the first storage area can provide a buffering effect for the composite strip before it enters the preheating stage. When stagnation occurs during the unwinding of the amorphous alloy strip, the composite strip in the first storage area can continue to be conveyed. Similarly, the second storage area provides a buffering effect for the composite strip before it enters the winding and cutting stages. When stagnation occurs during the winding of the composite strip, the composite strip can continue to enter the second storage area.

[0028] Optionally, in S30, the cooling process includes one or both of air cooling and water cooling.

[0029] Optionally, in S30, the cooling process is sequentially set to air cooling and water cooling.

[0030] In summary, this application has the following beneficial effects: 1. The thickness of the composite strip after lamination by the preparation process of this application increases, and the bonding of each layer of amorphous alloy strip is strengthened by the adhesive. The external stress can be transmitted to each layer of amorphous alloy strip and dispersed, thereby obtaining a composite strip with stronger toughness, so that the processing performance of the amorphous alloy composite strip is better. The continuous lamination method makes the interface of each layer of amorphous alloy strip fully contact with the adhesive. After aging, the adhesive produces good adhesion, improves the interlayer bonding force and the structural stability of the composite strip. Before aging, the composite strip is first preheated. The preheating improves the fluidity of the adhesive and improves the uniformity of dispersion. In combination with the compression of the composite strip, the bubbles between the layers of amorphous alloy strips are discharged when the adhesive is flowing, reducing the gaps between the layers of amorphous alloy strips, and improving the flatness of the composite strip, appropriately eliminating the uneven thickness.

[0031] 2. Before the composite strip is matured, it undergoes induction heating and vacuum heat sealing. The composite strip is extruded in a vacuum environment and then compacted by multiple mechanisms in a roller pressing manner, which helps to discharge bubbles between the layers of amorphous alloy strips and make the interfaces of the layers of amorphous alloy strips further fully contact with the adhesive, thereby improving the stability and thickness uniformity of the composite strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a flow chart of the process for preparing the amorphous alloy multilayer composite material according to the embodiment of the present application.

[0033] Figure 2 It is a planar structural diagram of the preparation process of the amorphous alloy multilayer composite material according to the embodiment of the present application.

[0034] Figure 3 It is a planar structure diagram of embodiment S10 of the present application.

[0035] Figure 4 It is a planar structure diagram of embodiment S20 of the present application.

[0036] Figure 5 It is a planar structural diagram of the ripening process S30 of the embodiment of the present application.

[0037] Figure 6 It is a planar structural diagram of the cooling process S30 of the embodiment of the present application.

[0038] Figure 7 It is a planar structure diagram of embodiment S40 of the present application.

[0039] Description of reference numerals: 1. Amorphous alloy strip; 11. Amorphous alloy coil; 2. Composite strip; 3. Unwinding mechanism; 31. Gluing mechanism; 32. First pressure roller; 33. Tension detector; 4. First storage area; 41. Conveying roller; 42. Pulling roller; 5. Induction heating equipment; 51. Vacuum composite equipment; 52. Second pressure roller; 6. Curing oven; 61. Guide roller; 7. Air cooling mechanism; 71. Water cooling mechanism; 8. Second storage area; 9. Rewinding mechanism; 91. Cutting mechanism. DETAILED DESCRIPTION

[0040] The following is combined with Figure 1-7 This application is described in further detail.

[0041] The present application discloses a process for preparing an amorphous alloy multilayer composite material. Figure 1 and Figure 2 As shown, a process for preparing an amorphous alloy multilayer composite material comprises the following steps: S10. Multiple single-layer amorphous alloy strips 1 are stacked successively to form a multi-layer composite strip 2, and an adhesive is applied between adjacent amorphous alloy strips 1. Figure 3 shown.

[0042] The number of amorphous alloy strips 1 in the composite strip 2 is not limited. In other embodiments, the number of amorphous alloy strips 1 can be four, six or ten. In the present embodiment, the number of amorphous alloy strips 1 is specifically eight. The composite strip 2 after eight amorphous alloy strips 1 are stacked has a large thickness, and the external stress can be transmitted to each layer of amorphous alloy strips 1 and dispersed, so that the composite strip 2 has strong toughness, reduced brittleness, and better processing performance.

[0043] The amorphous alloy strip 1 is obtained by unwinding the amorphous alloy coil 11, and the unwinding action is completed by the unwinding mechanism 3. After the amorphous alloy strip 1 is unwound, it is guided by the roller and conveyed forward. In this embodiment, a total of eight rolls of amorphous alloy coils 11 are provided, and the rolls of amorphous alloy coils 11 are distributed according to the forward direction of the amorphous alloy strip 1. Before the second and subsequent amorphous alloy strips 1 are conveyed forward, the glue coating mechanism 31 coats one side of the amorphous alloy strip 1 with adhesive.

[0044] The method of stacking multiple amorphous alloy strips 1 is that the previous amorphous alloy strip 1 is conveyed forward, and the next amorphous alloy strip 1 is close to the previous amorphous alloy strip 1 after being coated with adhesive on one side, and a pair of first pressing rollers 32 are arranged at the assembly of the front and rear amorphous alloy strips 1, and the pair of first pressing rollers 32 complete the rolling action, and the previous amorphous alloy strip 1 and the next amorphous alloy strip 1 are stacked and bonded, and then continue to be conveyed forward, and the above steps are repeated to stack, and a multi-layer composite strip 2 is obtained. That is, in this embodiment, a single-layer amorphous alloy strip 1 is stacked and composited with a single-layer amorphous alloy strip 1 to obtain a double-layer amorphous alloy strip 1, and then the obtained double-layer amorphous alloy strip 1 is stacked and composited with another single-layer amorphous alloy strip 1 to obtain a three-layer amorphous alloy strip 1, and so on and so forth are repeated to obtain an eight-layer composite strip 2.

[0045] If multiple amorphous alloy strips 1 are laminated and compounded into a composite strip 2 by the same pair of rollers at the same time, it is easy to cause speed differences between the layers of amorphous alloy strips 1 during the simultaneous lamination process because it is difficult to synchronize the tension of the multiple amorphous alloy strips 1 during the forward conveyance process. The more layers there are, the more obvious the interference between the layers is, which leads to wrinkles in the composite strip 2 and a decrease in the yield rate. The above-mentioned continuous lamination method allows the interface of each layer of amorphous alloy strip 1 to fully contact with the adhesive, improves the stability of each layer during the roller lamination process, and produces good adhesion after aging, which improves the interlayer bonding strength and the structural stability of the composite strip 2, making it less likely to wrinkle and having a high yield rate.

[0046] The adhesive may be a solvent-based adhesive, a water-based adhesive, or a solvent-free adhesive, and may also be a single-component adhesive or a two-component adhesive. In this embodiment, the adhesive is specifically a two-component solvent-free adhesive, that is, before coating, the two components A and B of the adhesive are mixed and then coated on the amorphous alloy strip 1. The two-component solvent-free adhesive has the characteristics of environmental protection, short curing time, high bonding strength after aging, and improved hardness, which helps to improve the toughness of the composite strip 2.

[0047] Before the previous amorphous alloy strip 1 is roll-bonded with the next amorphous alloy strip 1, both the previous amorphous alloy strip 1 and the next amorphous alloy strip 1 pass through a tension detector 33. The tension detector 33 may be a movable tension roller. If the speeds of the previous amorphous alloy strip 1 and the next amorphous alloy strip 1 are different, the tension roller will be driven to move. The movement of the tension roller causes the potentiometer to be displaced, generating an electrical signal. The PLC is used to command the speed of the relevant coating roller or composite roller to increase or decrease, thereby changing the tension, so that the tension is output stably and the speed is consistent, thereby maintaining synchronous composite, improving the stability of the composite strip 2, and preventing wrinkling, deviation and other phenomena that affect product performance and quality.

[0048] S11. The composite strip 2 enters the first storage area 4, such as Figure 2 shown.

[0049] A plurality of conveying rollers 41 and traction rollers 42 are arranged in the first storage area 4, and the composite strip 2 is conveyed forward by the action of the conveying rollers 41 and traction rollers 42. The traction rollers 42 are movably arranged and can be moved by an electric lead screw or a cylinder. By moving the traction rollers 42, the conveying path of the composite strip 2 in the first storage area 4 can be extended or shortened, thereby providing a buffering effect for the composite strip 2 before entering the next preparation step. For example, when a brief stagnation occurs during the unwinding of the amorphous alloy strip 1, the conveying path of the composite strip 2 in the first storage area 4 can be changed from an extended state to a shortened state, which is equivalent to releasing the composite strip 2 stored in the first storage area 4, so that there is still composite strip 2 that can continue to be conveyed to the next preparation step, thereby maintaining the continuity of the preparation process.

[0050] S20. Preheat the composite strip 2 to improve the fluidity of the adhesive, and compress the composite strip 2 during the preheating process, such as Figure 4 shown.

[0051] Preheating accelerates the molecular movement in the adhesive, reduces the viscosity, and thus improves the fluidity. The dispersion uniformity between the layers of amorphous alloy strips 1 is improved, and combined with the compression of the composite strip 2, the bubbles between the layers of amorphous alloy strips 1 are discharged while the adhesive is flowing, thereby reducing the gaps between the layers of amorphous alloy strips 1, improving the flatness of the composite strip 2, and appropriately eliminating the uneven thickness.

[0052] The preheating process includes induction heating and vacuum heat sealing, which are arranged in sequence. The induction heating is completed by the induction heating device 5. The electromagnetic induction method is used to generate eddy currents inside the composite strip 2. Rapid heating is achieved through the energy of the eddy currents. The terminal temperature of the composite strip 2 is 90-110°C, that is, by induction heating, the temperature of the composite strip 2 reaches 90-110°C before leaving the induction heating device 5. Specifically, in this embodiment, the terminal temperature of the composite strip 2 is 100°C. Induction heating makes the amorphous alloy strip 1 heat up quickly and is more energy-efficient, so that the adhesive has good fluidity at the initial stage of vacuum heat sealing.

[0053] The vacuum heat sealing method is that the composite strip 2 passes through a vacuum environment with a heating source, the heating temperature is 90-110°C, and the duration of vacuum heat sealing is 3-15s. Specifically, in this embodiment, the temperature is 100°C and the duration is 3s. The vacuum environment with a heating source is a vacuum composite device 51, which can be obtained by modifying an oven. The oven is connected to a vacuum pump. Through the vacuum pumping effect, a negative pressure is formed in the oven, and a pair of second pressing rollers 52 are arranged inside the oven. The pair of second pressing rollers 52 roll and press the composite strip 2, so that when the adhesive reaches a state of good fluidity, the combination of negative pressure extrusion and rolling pressing promotes the discharge of bubbles between the layers of amorphous alloy strips 1 and the uniform dispersion of the adhesive, and further reduces the gaps between the layers of amorphous alloy strips 1.

[0054] S30. Ripening the composite strip 2, and cooling after aging to obtain an amorphous alloy multilayer composite material, such as Figure 5 and Figure 6 shown.

[0055] The composite strip 2 is aged in the aging oven 6 at a temperature of 180-200° C. for 2-4 minutes, and specifically at 180° C. for 3 minutes in this embodiment. After aging, the adhesive produces good adhesion, completes the bonding of each layer of the amorphous alloy strip 1, and improves the interlayer bonding strength and the structural stability of the composite strip 2.

[0056] A plurality of guide rollers 61 are provided in the aging oven 6. The guide rollers 61 guide the composite strip 2 to be reciprocated in the aging oven 6, thereby extending the conveying path of the composite strip 2 in the aging oven 6 and extending the aging time.

[0057] The cooling process is sequentially set to air cooling and water cooling, which are completed by the air cooling mechanism 7 and the water cooling mechanism 71 respectively, so as to achieve gradual cooling of the composite strip 2 and avoid sudden cooling. After water cooling, the temperature of the composite strip 2 is 80°C.

[0058] S31. The composite strip 2 enters the second storage area 8, such as Figure 2 shown.

[0059] Similar to the first storage area 4, a plurality of conveying rollers 41 and pulling rollers 42 are provided in the second storage area 8. The composite strip 2 is conveyed forward by the action of the conveying rollers 41 and the pulling rollers 42. The pulling rollers 42 are movably arranged and can be moved by an electric lead screw or a cylinder. By moving the pulling rollers 42, the conveying path of the composite strip 2 in the first storage area 4 can be extended or shortened, thereby providing a buffering effect for the composite strip 2 before entering the next preparation step. For example, when the amorphous alloy strip 1 is briefly stagnant in the next preparation step, the conveying path of the composite strip 2 in the second storage area 8 can be changed from a shortened state to an extended state, which is equivalent to storing the composite strip 2 in the second storage area 8 and releasing the composite strip 2 after the next preparation step is resumed, thereby maintaining the continuity of the preparation process.

[0060] S40. Rolling and cutting the amorphous alloy multilayer composite material, such as Figure 7 shown.

[0061] The winding mechanism 9 completes the winding of the amorphous alloy multilayer composite material, and the cutting mechanism 91 completes the cutting action.

[0062] This specific implementation manner is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the specific implementation manner as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A process for preparing an amorphous alloy multilayer composite material, characterized in that: The following steps are involved: S10. stacking a plurality of single-layer amorphous alloy strips (1) in succession to form a multi-layer composite strip (2), wherein an adhesive is applied between adjacent amorphous alloy strips (1); S20. Preheating the composite strip (2) to improve the fluidity of the adhesive, and compacting the composite strip (2) during the preheating process; S30. Ripening the composite strip (2), wherein the aging temperature is higher than the preheating temperature, and cooling after aging to obtain an amorphous alloy multilayer composite material.

2. The process for preparing an amorphous alloy multilayer composite material according to claim 1, characterized in that: In S20, the preheating process includes vacuum heat sealing, and the vacuum heat sealing method is that the composite strip (2) passes through a vacuum environment with a heating source, and the composite strip (2) is rolled and compacted during the vacuum heat sealing process.

3. The process for preparing an amorphous alloy multilayer composite material according to claim 2, characterized in that: In S20, the preheating process further includes induction heating, and the induction heating is performed before the vacuum heat sealing.

4. The process for preparing an amorphous alloy multilayer composite material according to claim 1, characterized in that: In S20, the terminal temperature of the composite strip (2) during the induction heating process is 90-110°C; the temperature of vacuum heat sealing is 90-110°C, and the duration of vacuum heat sealing is 3-15s.

5. The process for preparing an amorphous alloy multilayer composite material according to claim 1, characterized in that: In S30, the aging temperature is 180-200°C, and the aging duration is 2-4 minutes.

6. The process for preparing an amorphous alloy multilayer composite material according to claim 1, characterized in that: In S10, the plurality of amorphous alloy strips (1) are stacked in succession in the following manner: the first amorphous alloy strip (1) is conveyed forward, the second amorphous alloy strip (1) is coated with adhesive on one side and then approaches the first amorphous alloy strip (1), the first amorphous alloy strip (1) and the second amorphous alloy strip (1) are stacked and bonded together by rolling, and then conveyed forward, and the above steps are repeated to obtain a multi-layer composite strip (2).

7. The process for preparing an amorphous alloy multilayer composite material according to claim 6, characterized in that: Before the previous amorphous alloy strip (1) is bonded to the next amorphous alloy strip (1), both the previous amorphous alloy strip (1) and the next amorphous alloy strip (1) pass through a tension detector (33). If the speeds of the previous amorphous alloy strip (1) and the next amorphous alloy strip (1) are different, the tension detector (33) is used to adjust the speeds of the previous amorphous alloy strip (1) and the next amorphous alloy strip (1) to be the same.

8. The process for preparing an amorphous alloy multilayer composite material according to claim 1, characterized in that: The adhesive is a two-component solvent-free adhesive.

9. The process for preparing an amorphous alloy multilayer composite material according to claim 1, characterized in that: After S30, there is also S40; S40. Rolling and cutting the amorphous alloy multilayer composite material.

10. The process for preparing an amorphous alloy multilayer composite material according to claim 1, characterized in that: S11 is also included between S10 and S20, and S31 is also included between S30 and S40; S11. The composite strip (2) enters the first storage area (4); S31. The composite strip (2) enters the second material storage area (8).

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