Metal composite strengthening processing method and metal composite strengthening processing device

Abstract

The present invention provides a metal composite strengthening processing method and a metal composite strengthening processing device. The metal composite strengthening processing method includes: S100, performing a heat treatment on a metal workpiece; S200, applying a solid lubricant to the surface of the metal workpiece; S300, performing ultrasonic rolling on the metal workpiece. The present invention can embed a lubricant on the working surface of the metal workpiece to form a modified layer with a nanostructure and ensure the lubricity of the solid lubricant to improve its various properties.

Description

Technical Field

[0001] The present invention relates to the field of metal surface treatment, and more particularly, to a metal composite strengthening processing method and a metal composite strengthening processing device. Background Art

[0002] With the in-depth expansion of new technology fields, during the process of engineering applications, the wear of many mechanical equipment parts is equal to 0.2 - 0.3 mm, resulting in the parts being out of use. In particular, surface wear and fatigue failure have become important factors restricting the service life of equipment. The technical methods for reducing wear are based on the physical and chemical, thermal, and mechanical structures of the material itself, the surface layer material, and the workpiece surface to control the wear resistance of the surface.

[0003] Surface layer material strengthening is a method that can effectively improve the anti-wear performance, fatigue strength, and service life of parts. According to the different sources of the strengthening layer, it can be divided into additive strengthening, chemical strengthening, and physical strengthening processes. Additive strengthening includes laser cladding, vapor deposition, etc.; chemical strengthening includes carburizing, nitriding, etc.; physical strengthening includes shot peening, mechanical grinding, etc. Among them, laser phase transformation hardening and surface ultrasonic rolling are two processes with relatively prominent strengthening effects in physical strengthening. Since it is self-material strengthening, there are no problems such as large internal stress in the strengthening layer, poor bonding performance, easy cracking, and shedding. One of the deficiencies of the existing laser ultrasonic method is that it is impossible to form a modified layer with a nanostructure by embedding a lubricant on the working surface of the part.

[0004] CN106834637B discloses a technical solution for metal surface composite strengthening processing. This method is to apply a solid lubricant on the surface of a metal workpiece and then perform ultrasonic rolling, and heat while performing ultrasonic rolling to form a crystal hardening surface layer with a certain thickness on the surface of the metal workpiece, so as to effectively improve the surface hardness, anti-fatigue, and anti-wear performance of the metal workpiece. However, heating while performing ultrasonic rolling may weaken the lubricity of the solid lubricant, and even lose the lubricity due to too high temperature, thus failing to achieve the purpose of anti-fatigue and anti-wear performance.

[0005] Therefore, it is very necessary to provide a method for embedding a lubricant on the working surface of a metal workpiece to form a modified layer with a nanostructure and ensuring the lubricity of the solid lubricant to improve its various performances. Summary of the Invention

[0006] The present invention aims to solve at least one of the above problems.

[0007] To this end, the first object of the present invention is to provide a metal composite strengthening processing method.

[0008] The second object of the present invention is to provide a metal composite strengthening processing device.

[0009] To achieve the first object of the present invention, an embodiment of the present invention provides a method for metal composite strengthening processing, including:

[0010] S100. Heat-treat the metal workpiece;

[0011] S200. Apply a solid lubricant on the surface of the metal workpiece;

[0012] S300. Perform ultrasonic rolling on the metal workpiece.

[0013] In the present invention, by heating the surface of the metal workpiece, a hardened structure (fine-grained martensite hardening) is formed on the surface layer of the metal workpiece. Then, the solid lubricant is applied to the hardened surface. Finally, the hardened surface is impacted by an ultrasonic instrument, causing the fine-grained martensite to be crushed to form a nanostructured strengthened martensite. During this process, the solid lubricant is introduced into the surface layer to form a modified surface layer with solid lubricating elements. Eventually, a nanocrystalline structure with increased hardness is formed on the surface, and a regular micro-relief is formed on the surface layer. This process can be used in mechanical engineering to improve the service life and reliability of mechanical parts and machinery.

[0014] In addition, the technical solution provided in the above embodiment of the present invention may further have the following technical features:

[0015] In the above technical solution, the heating treatment method is laser heating; and / or a protective gas is introduced while performing the S100 operation.

[0016] In the present invention, the surface of the metal workpiece is heat-treated by continuous or pulsed laser radiation, and a protective gas is introduced during the S100 operation to prevent oxidation of the hardened area.

[0017] In any of the above technical solutions, S200 includes:

[0018] S210. Apply solid lubricant one on the surface of the metal workpiece;

[0019] S220. Apply solid lubricant two on the surface of the metal workpiece after the S210 operation.

[0020] The introduction of the solid lubricant can effectively improve the performance of the metal workpiece and enhance the modification effect. The combined use of the two solid lubricants will improve the modification efficiency and make the performance better.

[0021] In any of the above technical solutions, solid lubricant one is a suspension prepared by mixing graphite and kerosene in a mass ratio of 1:5; solid lubricant two is MoS2 powder.

[0022] The modification effect of using two solid lubricants in combination is better than using only one solid lubricant, especially for the modification effect of wear resistance. The suspension prepared with graphite and kerosene in this proportion can achieve better results.

[0023] In any of the above technical solutions, the ultrasonic frequency of ultrasonic rolling is 20,000 Hz to 30,000 Hz, the amplitude is 10 μm to 50 μm, the pressure of the ultrasonic emitter is 10 N to 100 N, and the angle between the ultrasonic emitter and the metal workpiece is 60° to 90°.

[0024] The present invention applies a solid lubricant to the surface of a metal workpiece on a hardened structure to form a modified layer on the surface of the metal workpiece. By using a relatively low ultrasonic frequency, amplitude and pressure, this purpose can be achieved. Passing through the metal workpiece at a certain angle and inclination can achieve a smoothing effect to reduce roughness.

[0025] To achieve the second object of the present invention, the present invention provides a metal composite strengthening processing device, including: a heating device for heating a metal workpiece; a solid lubricant dispensing device for applying a solid lubricant to the surface of the metal workpiece; an ultrasonic generating device for ultrasonic rolling; and a driving device for driving the metal workpiece to move in the processing device.

[0026] The present invention provides a device for metal composite strengthening processing. By heating on the surface of a metal workpiece, a fine-grained martensite hardened structure is formed on the surface layer of the metal workpiece. Then, a solid lubricant is applied to the hardened surface. Finally, the hardened surface is impacted by an ultrasonic instrument, causing the fine-grained martensite to be crushed to form a nanostructured strengthened martensite. During this process, the solid lubricant is introduced into the surface layer to form a modified surface layer with solid lubricating elements. Eventually, a nanocrystalline structure with increased hardness is formed on the surface, and a regular micro-relief is formed on the surface layer. This process can be used in mechanical engineering to improve the service life and reliability of mechanical parts and machinery.

[0027] In the above technical solution, the heating device includes: a laser source for emitting laser required for laser heating; an optical head for heating the metal workpiece at the heating station by the laser; a thermometer for measuring the temperature of the surface of the metal workpiece during laser heating; and a controller for adjusting the frequency of the laser source according to the temperature of the surface of the metal workpiece measured by the thermometer.

[0028] The laser emitted by the laser source reaches the optical head. The optical head heats the metal workpiece at the heating station. The thermometer measures the temperature of the surface of the metal workpiece during laser heating near the heating station and feeds the result back to the controller. The controller adjusts the power of the laser according to the temperature of the surface of the metal workpiece to achieve flexible control of the heating process.

[0029] In any of the above technical solutions, the solid lubricant dispensing device includes: a suspension dispenser that applies a suspension to the surface of the metal workpiece; and a powder dispenser that applies MoS₂ powder to the surface of the metal workpiece.

[0030] The suspension dispenser and the powder dispenser can evenly apply the suspension configured by graphite and kerosene and MoS₂ powder to the surface of the metal workpiece respectively to enhance lubricity.

[0031] In any of the above technical solutions, the ultrasonic generating device includes: an ultrasonic transmitter for emitting ultrasonic waves at the ultrasonic frequency required for ultrasonic rolling; an ultrasonic emitting head that performs ultrasonic rolling on the surface of the metal workpiece at the ultrasonic frequency emitted by the ultrasonic transmitter at the ultrasonic rolling station; and a telescopic converter that controls the amplitude of the ultrasonic emitting head.

[0032] The ultrasonic transmitter 310 emits ultrasonic waves at a certain frequency for ultrasonic rolling. The telescopic converter 330 is used to control the pressure and amplitude when the ultrasonic emitting head performs ultrasonic rolling. During this process, solid lubricant is introduced into the surface layer to form a modified surface layer with solid lubricating elements, and finally a nanocrystal structure with increased hardness is formed on the surface.

[0033] In any of the above technical solutions, the driving device enables the metal workpiece to sequentially pass through the processing stations corresponding to the heating device, the solid lubricant dispensing device, and the ultrasonic generating device respectively; the moving speed of the metal workpiece on the driving device is 0.1 m / min to 1 m / min.

[0034] The metal workpiece is placed on the driving device. During the process of forming the modified surface layer, the metal workpiece is driven by the driving device to be sequentially sent to each corresponding processing station at a uniform speed. Finally, a modified surface layer is formed on its surface. When the driving device drives the metal workpiece to move at this speed, the metal workpiece can complete the corresponding processing steps at each station and achieve good results.

[0035] The beneficial effects that can be achieved by adopting this technical solution are as follows: a nano-structured modified surface layer with specified quality parameters: the hardness is 62 HRC to 64 HRC; the surface roughness is Ra 0.05 μm to 0.3 μm; the depth h of the modified surface layer is 250 μm to 500 μm; for medium carbon steel, the hardness is increased by more than 3 times; the fatigue strength is increased by 1.5 times to 2 times; the internal compressive stress at a depth of 250 μm to 300 μm is 600 MPa to 800 MPa; compared with the untreated surface, the following indicators will be achieved: the wear is reduced by 2 times to 4 times; the wear coefficient is reduced by 2 times to 2.5 times. Description of the Drawings

[0036] Figure 1 It is a flowchart of the steps of the metal composite strengthening processing method according to the embodiment of the present invention;

[0037] Figure 2 This is a schematic diagram of the metal composite strengthening processing device according to an embodiment of the present invention.

[0038] Explanation of reference numerals in the drawings:

[0039] 10 - Metal composite strengthening processing device; 100 - Heating device; 110 - Laser source; 120 - Optical head; 121 - Hardening mode controller; 130 - Thermometer; 140 - Controller; 200 - Solid lubricant controller; 210 - Suspension dispenser; 220 - Powder dispenser; 300 - Ultrasonic generating device; 310 - Ultrasonic generator; 320 - Ultrasonic transmitting head; 330 - Telescopic converter; 20 - Metal workpiece; 22 - Hardening zone. Detailed implementation manners

[0040] In order to more clearly understand the above objects, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0041] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0042] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following Figure 1 and Figure 2 will be used to describe the specific embodiments of the present invention in detail.

[0043]

Embodiment 1

[0044] As Figure 1 shown, an embodiment of the present invention provides a metal composite strengthening processing method, which includes:

[0045] S100. Perform a heating treatment on the metal workpiece;

[0046] S200. Apply a solid lubricant on the surface of the metal workpiece;

[0047] S300. Perform ultrasonic rolling on the metal workpiece.

[0048] In the prior art, the laser ultrasonic method only forms a modified layer with a fine crystal structure on the surface of the metal workpiece. By repeatedly performing laser ultrasonic operations, a modified layer with a certain thickness of fine crystal structure is formed on the surface of the metal workpiece. However, the various properties of the modified layer with a fine crystal structure still cannot meet the current requirements.

[0049] In view of this, the embodiments of the present invention provide the above-mentioned metal composite strengthening processing method, and a modified layer with better performance and nanostructure is formed on the surface of the metal workpiece by the laser ultrasonic method. Compared with the known laser-ultrasonic treatment method: the hardness is increased by 20-25%, the roughness is reduced by 10-15%, the fatigue strength is increased by 15-20%, and the friction coefficient is reduced by 1.5-2 times.

[0050] The purpose of the embodiments of the present invention is to provide a metal composite strengthening processing method, which uses the laser ultrasonic method and introduces a solid lubricant on the surface of the metal workpiece, and finally forms a modified layer with nanostructure on the surface of the metal workpiece to improve the hardness, wear resistance and other properties of the metal workpiece.

[0051] Specifically, in the present invention, the metal workpiece is fixed on the workbench to ensure the linear movement of the metal workpiece. The laser beam irradiates the surface of the metal workpiece. Since only the surface layer is processed, that is, instantaneously heated and instantaneously cooled, to form a fine-grained martensite hardened zone. After the workpiece moves to a certain position, the solid lubricant is applied to the hardened surface of the metal workpiece through the solid lubricant distribution device, and then the ultrasonic wave impacts the surface of the hardened zone of the metal workpiece. Thereby, the fine-grained martensite is crushed to form nanostructured strengthened martensite. During this process, the solid lubricant is introduced into the surface layer, and finally a nanocrystalline structure with increased hardness is formed, and a regular micro-relief is formed on the surface layer. The hardness, wear resistance and fatigue strength of the surface layer of the metal workpiece are increased; the friction coefficient and surface roughness are greatly reduced. This process can be used in mechanical engineering to improve the service life and reliability of mechanical parts and machinery.

[0052] In some embodiments of the present invention, the heating treatment method is laser heating; and / or a protective gas is introduced while performing the S100 operation.

[0053] Preferably, the fine-grained martensite hardened structure on the surface of the metal workpiece is formed by irradiating and heating the surface of the metal workpiece with a laser to make the surface of the metal workpiece reach the hardening temperature, thereby forming a fine-grained martensite hardened structure on the surface of the metal workpiece. While irradiating and heating the surface of the metal workpiece with a laser to form a fine-grained martensite hardened structure, a protective gas such as an inert gas is introduced. The purpose of introducing the protective gas is to prevent the hardened zone from being oxidized.

[0054] It should be noted that the laser heats the surface of the metal workpiece in a continuous or pulsed radiation manner, and the hardening temperature should be set by those skilled in the art according to the material of the specific metal workpiece used.

[0055] In some embodiments of the present invention, S200 includes:

[0056] S210, applying a solid lubricant 1 on the surface of the metal workpiece;

[0057] S220. Apply solid lubricant two to the surface of the metal workpiece after the operation of S210.

[0058] Preferably, the introduction of the solid lubricant can effectively improve the performance of the metal workpiece and enhance the modification effect. The combined use of the two solid lubricants will improve the modification effect and result in better performance, thereby extending the service life of the metal workpiece.

[0059] In some embodiments of the present invention, solid lubricant one is a suspension prepared by mixing graphite and kerosene in a mass ratio of 1:5; solid lubricant two is MoS2 powder.

[0060] Preferably, the suspension prepared with graphite and kerosene in this proportion can achieve a good lubrication effect. After applying the suspension of graphite and kerosene, MoS2 powder is applied to further improve the lubricity.

[0061] It should be noted that the application order of the suspension of graphite and kerosene and MoS2 powder can be interchanged, or MoS2 powder can be added to the suspension of graphite and kerosene and mixed evenly for simultaneous application; MoS2 powder can be replaced by other solid lubricants. For example, any one or several of tungsten disulfide, molybdenum dialkyldithiocarbamate, flake graphite, graphene, and fluorinated graphite can be selected.

[0062] In some embodiments of the present invention, the ultrasonic frequency of ultrasonic rolling is 20000Hz to 30000Hz, the amplitude is 10μm to 50μm, the pressure of the ultrasonic emitter is 10N to 100N, and the angle between the ultrasonic emitter and the metal workpiece is 60° to 90°.

[0063] Preferably, in the present invention, the solid lubricant is applied to the surface of the metal workpiece on the hardened structure to form a modified layer on the surface of the metal workpiece. By using a smaller ultrasonic frequency, amplitude, and pressure, this purpose can be achieved. Passing through the metal workpiece at a certain angle and inclination can achieve a smoothing effect. Reversing the angle with respect to the feeding direction of the workpiece can reduce the roughness Ra to 0.05μm to 0.5μm. For example, for the ultrasonic impact treatment of the surface of copper and copper-based alloys used in DC motors, introducing a unique solid lubricant can significantly improve the surface wear resistance by 15% to 20%, increase the fatigue life by 20%, and shorten the running-in period of the component by 20% to 25%.

[0064] It should be noted that heating is not carried out simultaneously during ultrasonic rolling. Since the lubricity of the solid lubricant will be greatly reduced after heating and may lose lubricity when the temperature is too high, this can ensure the lubricating effect of the solid lubricant to the greatest extent.

[0065]

Example 2

[0066] As Figure 2As shown in the figure, the present invention provides a metal composite strengthening processing device 10, including: a heating device 100 for heating a metal workpiece 20; a solid lubricant dispenser 200 for applying a solid lubricant to the surface of the metal workpiece 20; an ultrasonic generating device 300 for ultrasonic rolling; and a driving device for driving the metal workpiece 20 to move in the processing device.

[0067] The purpose of the embodiment of the present invention is to provide a metal composite strengthening processing device to implement the above metal composite strengthening processing method for strengthening the surface of a metal.

[0068] In some embodiments of the present invention, the heating device 100 includes: a laser source 110 for emitting laser required for laser heating; an optical head 120 for heating the metal workpiece 20 at the heating station; a thermometer 130 for measuring the temperature of the surface of the metal workpiece 20 during laser heating; and a controller 140 for adjusting the frequency of the laser source 110 according to the temperature of the surface of the metal workpiece 20 measured by the thermometer 130.

[0069] Preferably, the optical head 120 can emit the laser emitted by the laser source 110 to the surface of the metal workpiece 20 at the heating station, so as to form a hardened zone 22 on the surface of the metal workpiece 20. The thermometer 130 is located at the bottom of the optical head 120 near the metal workpiece 20, and the temperature sensing element in the thermometer 130 is arranged towards the workbench direction. The thermometer 130 feeds back the temperature measurement result to the controller 140 through signal transmission, and the controller 140 controls parameters such as the power of the laser emitted by the laser source 110 to achieve flexible control of the temperature during the heating process.

[0070] It should be noted that the hardening temperature is set by the hardening mode controller 121, and the hardening mode controller 121 and the controller 140 cooperate with each other to jointly control parameters such as the laser power. The hardening temperature is set by those skilled in the art according to the actual materials used, and this temperature can be set in the hardening mode controller 121.

[0071] In some embodiments of the present invention, the solid lubricant dispenser 200 includes: a suspension dispenser 210 for applying a suspension to the surface of the metal workpiece 20; and a powder dispenser 220 for applying MoS2 powder to the surface of the metal workpiece.

[0072] Preferably, the bottom of the suspension dispenser 210 and the powder dispenser 220 are both provided with dispensing ports. The suspension is placed in the suspension dispenser 210, and the MoS2 powder is placed in the powder dispenser 220. The suspension and the MoS2 powder are evenly dispensed onto the heated hardening structure through the dispensing ports. When applying the suspension, a thrust force in the F1 direction is applied to the suspension dispenser 210. Under the action of the thrust force, the suspension is pushed out of the suspension dispenser 210 and thus applied to the hardened area 22 on the surface of the metal workpiece 20. When applying the MoS2 powder, a thrust force in the F2 direction is applied to the powder dispenser 220. Under the action of the thrust force, the MoS2 powder is pushed out of the powder dispenser 220 and thus applied to the hardened area 22 on the surface of the metal workpiece 20.

[0073] For example, the dispensing port can be a spraying dispensing port, a coating dispensing port or other types of dispensing ports. The suspension or the MoS2 powder is applied to the hardening structure by spraying, coating or other means. The types of dispensing ports of the suspension dispenser 210 and the powder dispenser 220 can be the same type of dispensing port or different types of dispensing ports.

[0074] It should be noted that since the application order of the suspension of graphite and kerosene and the MoS2 powder can be reversed, the positions of the suspension dispenser 210 and the powder dispenser 220 can also be exchanged. When the MoS2 powder is added and mixed with the suspension of graphite and kerosene and then applied simultaneously, only one solid lubricant dispenser needs to be set.

[0075] In some embodiments of the present invention, the ultrasonic generating device 300 includes: an ultrasonic transmitter 310 for emitting ultrasonic waves with the ultrasonic frequency required for ultrasonic rolling; an ultrasonic emitting head 320 that performs ultrasonic rolling on the surface of the metal workpiece 20 at the ultrasonic rolling station at the ultrasonic frequency emitted by the ultrasonic transmitter 310; and a telescopic converter 330 that controls the amplitude of the ultrasonic emitting head 320.

[0076] Preferably, the ultrasonic transmitter 310 emits ultrasonic waves with a certain frequency for ultrasonic rolling. The telescopic converter 330 is used to control the pressure and amplitude when the ultrasonic emitting head 320 performs ultrasonic rolling. The telescopic converter 330 applies pressure to the surface of the metal workpiece 20 in the direction of Pcm. During this process, the introduced solid lubricant is pressed to the surface layer to form a modified surface layer with solid lubricating elements, and finally a nano-crystalline structure with increased hardness is formed on the surface, and a regular micro-relief is formed on the surface layer.

[0077] Preferably, the ultrasonic emitter 320 mounted on the magnetostrictive transducer 330 impacts the surface of the hardened area 22 of the metal workpiece. At this time, the ultrasonic frequency generated by the ultrasonic generator 320 is 20,000 Hz to 30,000 Hz, and the amplitude is 10 μm to 50 μm. The ultrasonic emitter 15 presses on the hardened area 22 of the metal workpiece 20 with a force of 10 N to 100 N. The ultrasonic emitter 320 can be positioned at an angle of 90°, 80°, 70°, or 60° with respect to the processing surface, with the angle opposite to the feeding direction of the workpiece. The inclination can achieve a smooth surface effect, reducing the surface roughness Ra to 0.05 μm to 0.5 μm, thereby crushing the fine-grained martensite to form a nanostructured strengthened martensite. During this process, a solid lubricant is introduced into the surface layer, ultimately forming a nanostructured crystal structure with increased hardness, and a regular micro-relief is formed on the surface layer. The hardness, wear resistance, and fatigue strength of the workpiece surface layer are increased; the friction coefficient and surface roughness are greatly reduced.

[0078] In some embodiments of the present invention, the driving device causes the metal workpiece 20 to sequentially pass through the processing stations corresponding to the heating device 100, the solid lubricant dispensing device 200, and the ultrasonic generating device 300; the moving speed of the metal workpiece 20 on the driving device is 0.1 m / min to 1 m / min.

[0079] Preferably, the metal workpiece 20 is placed on the driving device, and the driving device drives the metal workpiece 20 to move along the S direction. During the formation of the modified surface layer, the metal workpiece 20 is sequentially sent to each corresponding processing station by the driving device at a uniform speed, and finally a modified surface layer is formed on its surface. When the driving device drives the metal workpiece 20 to move at this speed, the metal workpiece 20 can complete the corresponding processing steps at each station and achieve a better effect.

[0080] In summary, the beneficial effects of the embodiments of the present invention are as follows: A fine-grained martensite hardened layer is formed on the surface of the metal workpiece by laser irradiation, then a solid lubricant is introduced, and finally the fine-grained martensite is crushed by ultrasonic rolling to form a nanostructured crystal structure, ultimately achieving a modified surface layer with excellent surface properties on the metal workpiece. Moreover, the laser heating and ultrasonic rolling are carried out separately, effectively retaining the lubricity of the solid lubricant.

[0081] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0082] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A metal composite strengthening and processing method, characterized in that, Including: S100, heat-treating the metal workpiece; S200, applying a solid lubricant to the surface of the metal workpiece, the solid lubricant including solid lubricant one and solid lubricant two, and solid lubricant two is applied after solid lubricant one; S300, performing ultrasonic rolling on the metal workpiece, and not heating simultaneously during the ultrasonic rolling process; Wherein, the solid lubricant one is a suspension prepared by configuring graphite and kerosene according to a mass ratio of 1:5; the solid lubricant two is MoS2 powder.

2. The processing method according to claim 1, characterized in that The heat-treating method is laser heating; and / or A protective gas is introduced while performing the S100 operation.

3. The processing method according to claim 1, wherein The ultrasonic frequency of the ultrasonic rolling is 20000Hz to 30000Hz, the amplitude is 10μm to 50μm, the pressure of the ultrasonic emitter is 10N to 100N, and the angle between the ultrasonic emitter and the metal workpiece is 60° to 90°.

4. A metal composite strengthening processing device (10), characterized in that, For implementing the processing method according to any one of claims 1-3, the processing device includes: A heating device (100) for heating the metal workpiece (20); A solid lubricant dispensing device (200) for applying the solid lubricant to the surface of the metal workpiece (20); An ultrasonic generating device (300) for ultrasonic rolling; A driving device for driving the metal workpiece (20) to move in the processing device, and the moving speed of the metal workpiece (20) on the driving device is 0.1m / min to 1m / min; Wherein, the solid lubricant dispensing device (200) includes: a suspension dispenser (210) for applying the suspension to the surface of the metal workpiece (20); a powder dispenser (220) for applying MoS2 powder to the surface of the metal workpiece (20).

5. The processing device according to claim 4, wherein The heating device (100) includes: A laser source (110) for emitting the laser required for laser heating; An optical head (120) for heating the metal workpiece (20) at the laser heating station; A thermometer (130) for measuring the temperature of the surface of the metal workpiece (20) during laser heating; A controller (140) for adjusting the frequency of the laser source (110) according to the temperature of the surface of the metal workpiece (20) measured by the thermometer (130).

6. The processing device according to claim 4, wherein The ultrasonic generating device (300) includes: An ultrasonic transmitter (310) for emitting ultrasonic waves with the ultrasonic frequency required for ultrasonic rolling; An ultrasonic emitter (320) for performing ultrasonic rolling on the surface of the metal workpiece (20) at the ultrasonic rolling station with the ultrasonic frequency emitted by the ultrasonic transmitter (310); A telescopic converter (330) for controlling the amplitude of the ultrasonic emitter (320).

7. The processing device according to any one of claims 4 to 6, characterized in that The driving device enables the metal workpiece (20) to sequentially pass through the processing stations corresponding to the heating device (100), the solid lubricant dispensing device (200), and the ultrasonic generating device (300) respectively.

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