HIGH-THROUGHPUT PREPARATION DEVICE FOR METAL FIBER BASED ON MULTI POWDER AND METAL FIBER PREPARATION METHOD USING THE DEVICE

Abstract

Disclosed are a high-throughput preparation device for metal fiber based on multi powder and a method for preparing a metal fiber using the device. The high-throughput preparation device includes a metal powder conveying system, a metal powder mixing system, a metal powder melting system and a metal fiber forming system which are connected in sequence, where the metal powder melting system includes an induction powder melting device and a laser powder melting device which are independently disposed. The method for preparing a metal fiber using the high-throughput preparation device includes four steps: powder conveying, powder mixing, melting and forming.

Claims

1. A high-throughput preparation device for metal fiber based on multi powder, comprising a metal powder conveying system, a metal powder mixing system, a metal powder melting system and a metal fiber forming system which are connected in sequence; wherein the metal powder melting system comprises an induction powder melting device and a laser powder melting device which are independently disposed.

2. The high-throughput preparation device of claim 1, wherein the metal powder conveying system comprises a plurality of single-channel powder conveying devices.

3. The high-throughput preparation device of claim 1, wherein a mass flow controller is configured to implement feedback control of a powder feeding amount of the metal powder conveying system.

4. The high-throughput preparation device of claim 3, wherein the mass flow controller has a precision of ±0.1 g/min.

5. The high-throughput preparation device of claim 1, wherein the metal powder mixing system comprises a powder mixing device and a powder storing device which are connected in sequence.

6. The high-throughput preparation device of claim 5, wherein the powder inlet of the powder mixing device and the powder outlet of the metal powder conveying system are connected through a powder feeding pipe.

7. The high=throughput preparation device of claim 6, wherein the mass flow controller is disposed on the powder feeding pipe.

8. The high-throughput preparation device of claim 1, wherein the metal powder mixing system and the metal powder melting system are connected through a powder conveying pipe.

9. The high-throughput preparation device of claim 8, wherein, a powder melting switching device is configured to implement switching between the induction powder melting device and the laser powder melting device.

10. The high-throughput preparation device of claim 9, wherein the induction powder melting device comprises a powder storing chamber and an induction coil melting chamber.

11. The high-throughput preparation device of claim 1, wherein, the laser powder melting device comprises a laser melting chamber and a laser device.

12. The high-throughput preparation device of claim 1, wherein, an induction preheating coil is disposed on the powder conveying pipe connected to the laser powder melting device.

13. The high-throughput preparation device of claim 11, wherein, a laser beam emitted by the laser device is a continuously tunable laser beam.

14. The high-throughput preparation device of claim 12, wherein an angle between the laser beam emitted by the laser device and a central axis of an inlet of the powder conveying pipe is 50° to 80°.

15. The high-throughput preparation device of claim 1, wherein the metal powder forming system comprises a vacuum protective chamber, a servo motor, a mandrel, a rotary forming disk and a cooling system.

16. A method for preparing a metal fiber using the high-throughput preparation device of claim 1, comprising the following steps: (1) conveying metal powders of various components to the metal powder mixing system in preset ratios through the metal powder conveying system; (2) mixing the metal powders evenly in the metal powder mixing system and conveying the evenly mixed metal powders to the metal powder melting system; (3) in the metal powder melting system, melting the evenly mixed metal powders using the induction powder melting device or the laser powder melting device, and conveying the molten metal obtained by melting to the metal fiber forming system; and (4) preparing the molten metal into a metal fiber with a gradient change in composition through the metal fiber forming system.

17. The preparation method of claim 16, wherein the metal powder in step (1) has a particle size ranging from 50 .Math.m to 200 .Math.m.

18. The preparation method of claim 16, wherein the metal powder conveying system in step (1) has a powder feeding efficiency of 2 g/min to 10 g/min.

19. The preparation method of claim 16, wherein the melting the evenly mixed metal powders using the induction powder melting device in step (3) comprises: conveying the evenly mixed metal powders to the powder storing chamber, and conveying the evenly mixed metal powders to the induction coil melting chamber for heating and melting.

20. The preparation method of claims 16, wherein the melting the evenly mixed metal powders using the laser powder melting device in the step (3) comprises: conveying the evenly mixed metal powders to the powder conveying pipe of the induction preheating coil for preheating, and conveying the preheated metal powders to the laser melting chamber for heating and melting.

21. (canceled)

Description

BRIEF DESCRIPTION OF DRAWINGS

[0071] FIG. 1 is a schematic view illustrating a high-throughput preparation device for metal fiber based on multi powder provided by the present application;

[0072] FIG. 2 is a curve graph of preset ratios of a metal fiber corresponding to Application example 1; and

[0073] FIG. 3 is a curve graph of preset ratios of a metal fiber corresponding to Application example 2.

IN THE DRAWINGS

[0074] 1 metal powder conveying system [0075] 2 metal powder mixing system [0076] 3 metal powder melting system [0077] 4 metal fiber forming system [0078] 11 powder cylinder [0079] 12 pneumatic motor [0080] 13 powder feeding plate [0081] 14 powder outlet [0082] 15 powder feeding pipe [0083] 16 mass flow controller [0084] 21 powder inlet [0085] 22 rotating blade stirrer [0086] 23 powder storing device [0087] 24 static mixer [0088] 25 motor [0089] 26 powder mixer [0090] 31 powder melting switching device [0091] 32 powder storing chamber [0092] 33 induction coil melting chamber [0093] 34 induction preheating coil [0094] 35 laser melting chamber [0095] 36 powder conveying pipe [0096] 37 laser device [0097] 41 rotary drawing disk [0098] 42 rotary extrusion dual disk [0099] 43 vacuum protective chamber

DETAILED DESCRIPTION

[0100] Solutions of the present application are described more fully below through specific embodiments in connection with the drawings. Those who skilled in the art should understand that the embodiments are merely used for helping to understand the present application and should not be regarded as the specific limitations to the present application.

[0101] FIG. 1 is a schematic view illustrating a high-throughput preparation device for metal fiber based on multi powder provided by the present application. A pneumatic motor 12 is connected to a powder feeding plate 13. A powder cylinder 11 is disposed above the powder feeding plate 13. By rotating the powder feeding plate 13, the metal powders in the powder cylinder 11 can be conveyed to a powder outlet 14. The powder outlet 14 and a powder inlet 21 are connected to each other through a powder feeding pipe 15, and a mass flow controller 16 is disposed on the powder feeding pipe 15. The powder inlet 21 is disposed on the upper part of the powder mixer 26. A rotating blade stirrer 22 is disposed in the inner part of the powder mixer 26 and connected to a motor 25. A powder storing device 23 is connected below the powder mixer 26. A static mixer 24 is disposed in the inner part of the powder storing device 23. A powder conveying pipe 36 is connected to the powder mixer 26, is provided with a powder melting switching device 31, and can convey the evenly mixed metal powders to a powder storing chamber 32 or a laser melting chamber 35. The powder storing chamber 32 is connected to a induction coil melting chamber 33 up and down. A rotary drawing disk 41 is disposed below the induction coil melting chamber 33. The powder conveying pipe 36 is wound with a induction preheating coil 34 at a portion where the powder conveying pipe 36 is connected to the laser melting chamber 35. A laser device 37 is disposed in the inner part of the laser melting chamber 35, and a rotary extrusion dual disk 42 is disposed below the laser melting chamber 35. The vacuum protective chamber 43 protects the metal powder melting system 3 and the metal fiber forming system 4 under a vacuum environment, and protects the metal powders from being oxidized during the melting and forming process.

Embodiment 1

[0102] The embodiment provides a high-throughput preparation device for metal fiber based on multi powder. As shown in FIG. 1, the pneumatic motor 12 is connected to the powder feeding plate 13, the powder cylinder 11 is disposed above the powder feeding plate 13, the metal powders in the powder cylinder 11 can be conveyed to the powder outlet 14 by rotating the powder feeding plate 13, the powder outlet 14 and the powder inlet 21 are connected to each other through the powder feeding pipe 15, and the mass flow controller 16 is disposed on the powder feeding pipe 15; the powder inlet 21 is disposed on the upper part of the powder mixer 26, the rotating blade stirrer 22 is disposed in the inner part of the powder mixer 26 and connected to the motor 25, the powder storing device 23 are connected below the powder mixer 26, and the static mixer 24 is disposed in the inner part of the powder storing device 23; the powder conveying pipe 36 is connected to the powder mixer 26, is provided with a powder melting switching device 31, and can convey the evenly mixed metal powders to the powder storing chamber 32 or the laser melting chamber 35, the powder storing chamber 32 is connected to the induction coil melting chamber 33 up and down, the rotary drawing disk 41 is disposed below the induction coil melting chamber 33, the powder conveying pipe 36 is wound with the induction preheating coil 34 at a portion where the powder conveying pipe 36 is connected to the laser melting chamber 35, the laser device 37 is disposed in the inner part of the laser melting chamber 35, and the rotary extrusion dual disk 42 is disposed below the laser melting chamber 35; the vacuum protective chamber 43 protects the metal powder melting system 3 and the metal fiber forming system 4 under a vacuum environment, and protects the metal powders from being oxidized during the melting and forming process.

[0103] Wherein, 10 pneumatic rotary table powder feeders, each of which is composed of a powder cylinder 11, a pneumatic motor 12, a powder feeding plate 13 and a powder outlet 14, are included, accordingly, 10 powder feeding pipes 15, each of which is provided with a mass flow controller 16, are connected to the 10 pneumatic rotary table powder feeders respectively, and the 10 powder feeding pipes 15 are connected to 10 powder inlets 21 respectively.

[0104] The angle between the laser beam emitted by the laser device 37 and a central axis of the inlet of the powder conveying pipe 36 wound with the induction preheating coil 34 is 75°.

Embodiment 2

[0105] The embodiment provides a high-throughput preparation device for metal fiber based on multi powder. As shown in FIG. 1, this device differs from that of Embodiment 1 in that:

[0106] the angle between the laser beam emitted by the laser device 37 and the central axis of the inlet of the powder conveying pipe 36 wound with the induction preheating coil 34 is 60°.

Application Example 1

[0107] The application example provides a method for preparing a metal fiber which uses the high-throughput preparation device for metal fiber based on multi powder described in Embodiment one. The method includes the following steps. [0108] (1) In the metal powder conveying system 1, the iron powder with the particle size of 150 .Math.m and the nickel powder with the particle size of 150 .Math.m were added to different powder cylinders 11 respectively. The powder feeding plates 13 rotated with the driving of the pneumatic motors 12, and the metal powders in the each powder cylinder 11 were conveyed to the powder outlets 14 at a powder feeding efficiency of 8 g/min respectively. The metal powders at the each powder outlet 14 were further conveyed to the powder feeding pipes 15 with a mass flow controller 16 respectively by means of the airflow of the shielding gas, i.e. argon. According to preset ratios shown in FIG. 2, corresponding metal powders were conveyed to the metal powder mixing system 2. [0109] (2) In the metal powder mixing system 2, the metal powders from two paths entered the powder mixer 26 through the powder inlets 21 respectively, and were mixed by the rotating blade stirrer 22 driven by the motor 25. The mixed metal powders entered the powder storing device 23 with a static mixer 24 for further mixing. Finally, the evenly mixed metal powders were conveyed to the metal powder melting system 3. [0110] (3) In the metal powder melting system 3, the laser powder melting device was quickly switched to through a valve 31 with a manual lever, and the evenly mixed metal powders were first conveyed to the powder conveying pipe 36 with the induction preheating coil 34 to be preheated to 700° C., and then entered the laser melting chamber 35 to be heated and melted at 1700° C. [0111] (4) In the metal fiber forming system 4, the molten liquid metal was prepared by the rotary extrusion dual disk 42 into a rectangular band-shaped iron-nickel gradient metal fiber with a cross-sectional size of 2 mm.sup.2.

Application Example 2

[0112] The application example provides a method for preparing a metal fiber which uses the high-throughput preparation device for metal fiber based on multi powder described in Embodiment two. The method includes the following steps. [0113] (1) In the metal powder conveying system 1, the magnesium powder with the particle size of 100 .Math.m, the aluminum powder with the particle size of 100 .Math.m and the iron powder with the particle size of 100 .Math.m were added to different powder cylinders 11 respectively. The powder feeding plates 13 rotated with the driving of the pneumatic motors 12, and the metal powder in each powder cylinder 11 were conveyed to the powder outlet 14 at the powder feeding efficiency of 2 g/min respectively. The metal powders at the each powder outlet 14 were further conveyed to the powder feeding pipes 15 with a mass flow controller 16 respectively by means of the airflow of the shielding gas, i.e. argon. According to preset ratios shown in FIG. 3, corresponding metal powders were conveyed to the metal powder mixing system 2. [0114] (2) In the metal powder mixing system 2, the metal powders from three paths entered the powder mixer 26 through the powder inlets 21 respectively, and were mixed by the rotating blade stirrer 22 driven by the motor 25. The mixed metal powders entered the powder storing device 23 with a static mixer 24 for further mixing. Finally, the evenly mixed metal powders were conveyed to the metal powder melting system 3. [0115] (3) In the metal powder melting system 3, the induction powder melting device was quickly switched to through a valve 31 with a manual lever, and the evenly mixed metal powders were first conveyed to the powder storing chamber 32, and then entered the induction coil melting chamber 33 to be heated and melted at 1200° C. [0116] (4) In the metal fiber forming system 4, the molten liquid metal was prepared by the rotary drawing disk 42 into a circular wire magnesium-aluminum-iron gradient metal fiber with a cross-sectional size of 3 mm.sup.2.

[0117] It can be seen from Embodiments 1 and 2 and Application examples 1 and 2 that the high-throughput preparation device of the present application not only has the characteristics of simple structure, easy operation, wide melting temperature range and wide application range, but also can realize the high-throughput preparation of the metal fiber with continuous gradient change in composition.

[0118] The applicant has stated that although the detailed structure characteristics of the present application are described through the embodiments described above, the present application is not limited to the detailed structure characteristics described above, which means that implementation of the present application does not necessarily depend on the detailed structure characteristics described above.

[0119] The optional embodiments of the present application are described above in detail, but the present application is not limited to specific details in the embodiments described above.

[0120] In addition, it is to be noted that if not in collision, the specific technical features described in the above specific embodiments may be combined in any suitable manner. In order to avoid unnecessary repetition, the present application does not further specify any of various possible combination manners.