Electric hair cutter blade, preparation method thereof and electric hair cutter

Abstract

The invention discloses an electric hair cutter blade, a preparation method thereof and an electric hair cutter, and relates to the technical field of electric hair cutters. The electric hair cutter blade comprises a blade substrate, and a coating comprising a transition layer and a functional layer is arranged on the blade substrate; wherein the transition layer comprises at least one layer formed by at least one of TiAl nitride and TiSi nitride, and the heat conductivity coefficient of the transition layer is lower than that of the blade substrate; the functional layer is at least one layer formed by carbonitride of TiSi, the content of Si is larger than 0 at.% and smaller than 20 at.%, the content of C is larger than 0 at.% and smaller than 20 at.%, and at least one layer of carbonitride of TiSi is located on the outermost side of the coating; according to the technical scheme, the temperature rise of the blade of the electric hair cutter is reduced, so that the use comfort is improved, the working current under the rated voltage is reduced by reducing the friction coefficient of the friction pair, the service life of the battery can be prolonged, and the electric hair cutter is suitable for the high-speed machine of the electric hair cutter.

Description

Technical Field

[0001] The present invention relates to the technical field of electric hair clippers, and particularly to an electric hair clipper blade, a preparation method thereof, and an electric hair clipper. Background Art

[0002] Nowadays, the beauty and hair care industry has an increasingly high requirement for the driving speed of electric hair clippers. The motor driving speed of electric hair clippers has developed from a low-speed machine of more than 3000 revolutions per minute to a high-speed machine of nearly 10000 revolutions per minute. However, the blades with high-speed friction bring two prominent problems: one is the temperature rise problem of the blades. The stable temperature rise after the electric hair clipper idles for 10 minutes has increased from 52 °C of the low-speed machine to an unacceptable height, and there is a feeling of burning during use; the other is that the high driving speed seriously affects the service life of the battery. The no-load idling current of the electric hair clipper has increased from 600 - 800 mA of the low-speed machine to about 1200 mA, seriously affecting the service life of the battery.

[0003] Currently, people try to reduce the friction coefficient of the friction pair of the electric hair clipper blade by replacing the blade of the electric hair clipper with a ceramic material or coating a diamond-like carbon film, in order to reduce the temperature rise of the blade and the driving current during the use of the electric hair clipper and improve the use performance; however, these measures have had little effect so far, and it is still far from enabling the high-speed machine to reach the temperature rise and driving current indicators when the low-speed machine is used. Summary of the Invention

[0004] The present invention provides an electric hair clipper blade, a preparation method thereof, and an electric hair clipper, aiming to improve the use performance of high-speed electric hair clippers.

[0005] The electric hair clipper blade provided by the present invention includes:

[0006] A blade substrate, on which a coating is provided, and the coating includes a transition layer and a functional layer;

[0007] Wherein, the transition layer includes at least one layer formed by at least one of a nitride of TiAl and a nitride of TiSi, and the thermal conductivity of the transition layer is lower than that of the blade substrate;

[0008] The functional layer is at least one layer formed by a carbonitride of TiSi, wherein the content of Si is greater than 0 at.% and less than 20 at.%, the content of C is greater than 0 at.% and less than 20 at.%, and at least one layer of the carbonitride of TiSi is located on the outermost side of the coating.

[0009] Optionally, the thermal conductivity of the functional layer is lower than that of the blade substrate.

[0010] Optionally, the transition layer includes at least one layer formed by a nitride of TiAl and at least one layer formed by a nitride of TiSi;

[0011] Among them, at least one layer of nitride of TiSi is provided between the nitride of any layer of TiAl and the functional layer.

[0012] Optionally, at least one bonding layer is further provided between the blade substrate and the transition layer;

[0013] The bonding layer is at least one of a transition metal, a transition metal nitride, or an alloy composed of a transition metal and an element of Group IIIA or IVA, or a nitride or carbonitride of the alloy; the transition metal element is at least one of the elements of Group IVB, VB, and VIB.

[0014] Optionally, the content of N element or C element in the bonding layer increases or decreases in a gradient from the surface of the blade substrate to the direction away from the blade substrate;

[0015] And / or, the N element in the transition layer increases or decreases in a gradient from the surface of the blade substrate to the direction away from the blade substrate.

[0016] Optionally, one or more of the transition layers and one or more of the functional layers form a periodic coating, and a plurality of the periodic coatings are stacked on the blade substrate.

[0017] The preparation method of the electric hair clipper blade provided by the present invention includes the following steps:

[0018] Step 1, heat-treat the blank and process the heat-treated blank into the blade substrate of the electric hair clipper;

[0019] Step 2, prepare a coating on the blade substrate by arc ion plating, first deposit at least one bonding layer, and then deposit a transition layer and a functional layer on the bonding layer;

[0020] Among them, the transition layer includes at least one layer formed by at least one of a nitride of TiAl and a nitride of TiSi; the functional layer is at least one layer formed by a carbonitride of TiSi, wherein the content of Si is greater than 0 at.% and less than 20 at.%, the content of C is greater than 0 at.% and less than 20 at.%, and at least one layer of carbonitride of TiSi is located on the outermost side of the coating.

[0021] Optionally, the method for depositing the transition layer by arc ion plating includes:

[0022] Maintain the working gas as pure nitrogen, set the working pressure in the range of 0.5 - 5 Pa, and set the bias voltage in the range of 20 - 250 V;

[0023] Control the target working current within the range of 50 - 150 A, start the TiAl target or TiSi target for arc ion plating, and control the deposition time within the range of 30 - 200 min.

[0024] Optionally, the method for depositing the functional layer by arc ion plating includes:

[0025] Select pure nitrogen and acetylene as the working gas, set the working pressure within the range of 0.5 - 5 Pa; control the flow rates of nitrogen and acetylene introduced into the mixer, wherein the flow rate of acetylene is controlled within the range of 0 - 400 ml / min; set the bias voltage within the range of 20 - 250 V;

[0026] Control the target working current within the range of 50 - 150 A, start the TiSi target for arc ion plating, and control the deposition time within the range of 30 - 200 min.

[0027] The present invention also provides an electric hair clipper, including the electric hair clipper blade described above.

[0028] The present invention has the following beneficial effects:

[0029] The present invention prepares a coating on the blade substrate of the electric hair clipper. The materials of the transition layer are selected as nitrides of TiAl and / or nitrides of TiSi with relatively low thermal conductivity, and these two materials can play a thermal barrier role. The coating is provided on the surface of the stationary blade of the electric hair clipper that contacts the human skin, which can reduce the temperature rise of this side surface of the stationary blade, avoid the burning of the human skin caused by the increase in the blade temperature, and improve the comfort of using the electric hair clipper; in addition, the outermost functional layer of the coating uses carbonitride of TiSi with a low friction coefficient. The coating is provided on the surfaces of the stationary blade and the moving blade of the electric hair clipper that relatively frictionally move, which can greatly reduce the counter-grinding friction coefficient of the blade friction pair, thereby reducing the working current of the electric hair clipper under the rated voltage and improving the service life of the battery; therefore, the technical solution of the present invention comprehensively improves the overall performance of the electric hair clipper, especially the high-speed electric hair clipper, and has important significance for the market application of the high-speed electric hair clipper. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0031] Figure 1 It is a schematic diagram of the coating structure of the electric hair clipper blade in some embodiments of the present invention;

[0032] Figure 2This is a graph showing the relationship between the friction sliding distance and the friction coefficient of an electric hair clipper with functional layers of different compositions in the embodiments of the present invention.

[0033] Explanation of reference numerals:

[0034] 100, blade substrate; 200, bonding layer; 300, transition layer; 400, functional layer. Detailed implementation manners

[0035] To make the objectives, features, and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the embodiments described below are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] The objective of the embodiments of the present invention is to prepare a coating on the blade substrate of an electric hair clipper to avoid the overheating of the electric hair clipper during high-speed operation, which may cause a burning sensation on the human skin, and at the same time reduce the friction coefficient of the blade friction pair, thereby reducing the driving current of the electric hair clipper and extending the service life of the power supply battery.

[0037] The present invention covers the term "coating" to represent all the layers prepared on one side surface of the blade substrate; wherein, a "layer" is distinguishable from other "layers" in terms of its material composition, morphology, or structure; it should be understood that in the present invention, "at least one (layer)" means one or more, and "a plurality" means two or more; in the present invention, the nitride of TiAl can be abbreviated as "TiAlN", the nitride of TiSi can be abbreviated as "TiSiN", and the carbonitride of TiSi can be abbreviated as "TiSiCN". The abbreviated form only represents the types of elements contained in the material, and does not limit any form of the element component ratio or the bonding form.

[0038] The blade of an electric hair clipper includes a fixed blade and a moving blade. The fixed blade and the moving blade form a friction pair. When the electric hair clipper is in use, one surface of the fixed blade moves on the human skin and contacts the human skin, and the moving blade reciprocates back and forth under the drive of the motor and quickly intersects with the other surface of the fixed blade to cut hair; the driving speed of the motor of the high-speed electric hair clipper is nearly 10,000 revolutions per minute. The high temperature generated by the friction between the high-speed moving blade and the fixed blade will be transmitted to the human skin through the fixed blade substrate, causing a burning sensation on the human skin and resulting in poor use comfort; at the same time, the large friction coefficient between the fixed blade and the moving blade will cause an increase in the driving current and shorten the service life of the battery.

[0039] The purpose of the existing coating process used on the blades of electric hair clippers is usually to maintain the sharpness of the blades with wear-resistant coatings. There has been little research on the above problems. Although some studies have used ceramic blades instead of traditional stainless steel substrates, or deposited diamond-like films on the substrates to reduce the friction coefficient of the friction pair, the results have been minimal and it is not applicable to high-speed electric hair clippers driven by motors at speeds of 10,000 revolutions per minute and above. Therefore, there is an urgent need for a new solution to improve the overall performance of high-speed electric hair clippers. The blades of electric hair clippers should at least meet the following requirements: the blades have a long sharpness retention life, the friction coefficient of the friction pair of the blades is small, the temperature rise of the blades is as small as possible, and it does not cause a burning sensation on the human skin.

[0040] Based on the above requirements, referring to Figure 1 , an electric hair clipper blade proposed in an embodiment of the present invention includes a blade substrate 100, on which a coating is provided. The coating includes a transition layer 300 and a functional layer 400; wherein, the transition layer 300 includes at least one layer formed by at least one of nitrides of TiAl and nitrides of TiSi, and the thermal conductivity of the transition layer 300 is lower than the thermal conductivity of the blade substrate 100; the functional layer 400 is at least one layer formed by carbonitrides of TiSi, wherein the content of Si is greater than 0 at.% and less than 20 at.%, the content of C is greater than 0 at.% and less than 20 at.%, and at least one layer of carbonitrides of TiSi is located on the outermost side of the coating.

[0041] Based on this, the coating system deposited on the blade substrate 100 usually further includes at least one bonding layer 200, and the bonding layer 200 is provided between the blade substrate 100 and the transition layer 300; the bonding layer 200 is at least one of transition metals (here, transition metal elements include elements in groups IVB, VB, and VIB, such as Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, etc.), transition metal nitrides (such as TiN, CrN, etc.), or an alloy composed of a transition metal and an element in group IIIA or IVA (such as TiAl, AlCr), or a nitride or carbonitride of the alloy (such as TiAlN, CrAlN, etc.); preferably, the material of the bonding layer is selected from Ti or TiAl.

[0042] Among them, the material of the blade substrate 100 is usually quenched martensitic stainless steel, whose thermal conductivity is about 24-28 W / m·K; the thermal conductivity of the TiAlN coating is about 5-15 W / m·K, and the thermal conductivity of the TiSiN coating is between 3-10 W / m·K; therefore, depositing a TiAlN coating or a TiSiN coating on the blade substrate in the embodiments of the present invention can play a certain thermal barrier role. Setting the coating proposed in the embodiments of the present invention on the surface of the fixed blade of the electric hair clipper in contact with the human skin can reduce the temperature rise of the blade surface, avoid the human skin from having a burning sensation due to the increase in the blade temperature, and improve the comfort of using the electric hair clipper.

[0043] The friction coefficient of the friction pair of the electric hair clipper blade made of quenched martensitic stainless steel is between 0.6 and 0.8; setting the coating proposed in the embodiments of the present invention on the surfaces where the fixed blade and the moving blade rub against each other, since the functional layer located on the outermost side of the coating uses TiSiCN material, the TiSiCN material not only has high hardness and wear resistance, but also has a low friction coefficient; refer to Figure 2 , in the embodiments of the present invention, the coating is deposited on the surfaces where the fixed blade and the moving blade rub against each other through a specific process, and the friction coefficient between the fixed blade and the moving blade can be controlled at about 0.2 or even lower. The low friction coefficient can reduce the working current of the electric hair clipper and improve the service life of the battery.

[0044] In addition, the thermal conductivity of the TiSiCN coating is between 5 and 20 W / m·K, which is lower than that of the quenched martensitic stainless steel. Together with the transition layer, it can achieve a comprehensive thermal barrier effect and further reduce the temperature rise of the blade surface.

[0045] It should be noted that in the embodiments of the present invention, the blade substrate of the electric hair clipper is not limited to quenched martensitic stainless steel, and can also be carbon steel, titanium alloy, ceramic or composite material. Depositing the coating system proposed in the embodiments of the present invention on the blade substrates of different materials can also achieve the same or similar effects as the above embodiments.

[0046] In some embodiments, the transition layer in the coating system can only use one or more layers of TiAlN, or only use one or more layers of TiSiN, both of which can achieve a certain thermal barrier effect.

[0047] In some other embodiments, the transition layer includes at least one layer formed of TiAlN and at least one layer formed of TiSiN. Among them, at least one layer of TiSiN is provided between any layer of TiAlN and the TiSiCN functional layer; the TiAlN coating has fine grains, not only has high hardness, high strength and low thermal conductivity, but also has excellent chemical stability and can resist the erosion of various chemical substances; while TiSiN is usually a nanocrystalline-amorphous composite structure of TiN and Si3N4, has high hardness, high wear resistance and low thermal conductivity, and has excellent adhesion to the TiSiCN functional layer located on the surface layer.

[0048] In addition, in order to further enhance the overall adhesion of the coating, in some embodiments, the bonding layer includes N element or C element, and the bonding layer can be provided in multiple layers. The N element content or C element content in the multiple bonding layers increases or decreases in a gradient from the surface of the blade substrate to the direction away from the blade substrate; in some embodiments, the transition layer composed of TiAlN and / or TiSiN is provided in multiple layers, and the composition gradient of N element can also be designed in the multiple transition layers. The N element content of each layer increases or decreases in a gradient from the surface of the blade substrate to the direction away from the blade substrate; in some embodiments, the TiSiCN functional layer is provided in multiple layers, and the N element or C element content of the multiple functional layers increases or decreases in a gradient from the surface of the blade substrate to the direction away from the blade substrate.

[0049] In some embodiments, one or more transition layers and one or more functional layers form a periodic coating, and multiple periodic coatings can be provided on the blade substrate; for example, a periodic coating includes a TiAlN-TiSiN-TiSiCN stack in which each material is a single-layer coating. Two periodic coatings, namely TiAlN-TiSiN-TiSiCN-TiAlN-TiSiN-TiSiCN, are provided on the blade substrate, which can improve the flatness and density of the coating, thereby improving the overall quality of the coating.

[0050] The electric clipper blade provided by the present invention can adopt the process of arc ion plating, and the coating is prepared through the following steps:

[0051] Step 1, heat-treat the blank and process the heat-treated blank into the blade substrate of the electric clipper.

[0052] The blank can adopt quenched martensitic stainless steel. First, place the blank at a certain temperature for heat preservation, then quench it, and then temper the quenched blank.

[0053] Step 2, deposit the bonding layer on the blade substrate by arc ion plating, and then deposit the transition layer and the functional layer on the bonding layer.

[0054] Among them, the transition layer includes at least one layer formed by at least one of the nitrides of TiAl and the nitrides of TiSi, and the thermal conductivity of the transition layer is lower than that of the blade substrate; the functional layer is at least one layer formed by the carbonitride of TiSi, wherein the content of Si is greater than 0 at.% and less than 20 at.%, the content of C is greater than 0 at.% and less than 20 at.%, and at least one layer of the carbonitride of TiSi is located on the outermost side of the coating.

[0055] Preferably, the material of the bonding layer is selected from Ti or TiAl.

[0056] Among them, the method of depositing the transition layer by arc ion plating is as follows:

[0057] Maintain the working gas as pure nitrogen, set the working pressure in the range of 0.5 - 5 Pa, and set the bias voltage to a fixed value within the range of 20 - 250 V or a value that changes linearly with time; control the target working current within the range of 50 - 150 A, turn on the TiAl target or TiSi target for arc ion plating, and control the deposition time within the range of 30 - 200 min.

[0058] The method of depositing the functional layer by arc ion plating is as follows:

[0059] Select the working gas as pure nitrogen and acetylene, set the working pressure in the range of 0.5 - 5 Pa; control the flow rates of nitrogen and acetylene introduced into the mixer, wherein the flow rate of acetylene is controlled within the range of 0 - 400 ml / min; set the bias voltage to a fixed value within the range of 20 - 250 V or a value that changes linearly with time; control the target working current within the range of 50 - 150 A, turn on the TiSi target for arc ion plating, and control the deposition time within the range of 30 - 200 min.

[0060] Since the properties of the coating are extremely sensitive to the coating process, different equipment and parameter changes may result in different coating properties. Therefore, after summarizing a large number of tests and measurements conducted in the laboratory and production process, the present invention also provides the following specific examples and comparative examples to further illustrate the implementation manner and beneficial effects of the technical solution of the present invention. The following specific examples and comparative examples are exemplary and do not constitute any form of limitation to the protection scope of the present invention.

[0061] Example 1

[0062] Preprocessing of the blank: The spheroidized annealed martensitic stainless steel plate is stamped into an electric clipper blank, and then it is processed through various passes to form an electric clipper blank; the blank is held at a certain determined temperature between 1025 and 1080 °C and then quenched; then it is tempered at a certain determined temperature between 180 and 580 °C for more than 4 hours to meet the requirements that the hardness of the scissor blade matrix is in the range of 52 - 65 HRC and the strength is greater than 1500 MPa; the blank after heat treatment is further processed through subsequent processes; in particular, its working plane (the contact surface where the fixed and moving blades move relative to each other) is finely ground to meet the requirements of qualified electric clippers.

[0063] The blank to be prepared for coating is first demagnetized on a demagnetizer to remove the residual magnetism generated by mechanical processing, and then put into an automatic cleaning line for multi-pass ultrasonic cleaning and pure water rinsing to remove the physically adsorbed wax and various dirt on the surface of the blank, and then its acid-base balance is processed; the blank after cleaning is slowly pulled out of the water and then dried and baked with compressed air.

[0064] The coating is prepared by the process of arc ion plating:

[0065] It is preferred to select an ion coating machine with a new type of arc target with electromagnetic control and permanent magnetic control.

[0066] The electric clipper blank after cleaning and drying is hung on a special coating rack, loaded into the coating machine and evacuated to 5×10 -3 Pa, and the temperature inside the coating machine furnace is heated to a certain determined working temperature between 180 and 550 °C.

[0067] First, chemical ion cleaning of the blank is carried out in a reducing atmosphere; a mixed gas of argon and hydrogen is introduced into the furnace, the working pressure inside the furnace is controlled at a certain determined value between 0.5 and 5 Pa, the hydrogen input amount is controlled to change in a certain range between 50% and 0% of the total working pressure according to a linear control mode; the bias power supply is turned on, and the cleaning bias voltage is selected in a certain range or a certain determined value between 20 and 450 V; the special arc target for ion cleaning is turned on, and the arc current of this target is controlled at a certain specific value between 40 and 150 A; ion etching cleaning is carried out for a certain specific time length between 50 and 120 minutes according to a pre-programmed cleaning procedure.

[0068] After completing the chemical ion cleaning, the working gas is changed to pure argon, the working pressure is adjusted to a certain determined value between 0.5 and 5 Pa, the bias voltage is adjusted to a certain specific value between 20 and 150 V, and the electromagnetic control and permanent magnetic control parameters of the target magnetic field of a series of pure Ti targets are adjusted; the target current is adjusted to a certain specific value between 50 and 150 A, and the pure Ti target is turned on for coating for a certain specific time value between 3 and 30 minutes to complete the deposition of the bonding layer of the blank, and the obtained bonding layer material is Ti.

[0069] Replace the working gas with pure nitrogen, adjust the working pressure to a specific value between 0.5 and 5 Pa, and adjust the bias voltage to a specific value or linearly vary within a range between 20 and 250 V; adjust the electromagnetic control and permanent magnet control parameters of the target magnetic field for a row of Ti-Al targets; control the target working current to a specific value between 50 and 150 A, and turn on this row of Ti-Al targets to perform the transition layer plating on the sheared blank for a specific duration between 30 and 200 minutes. The obtained transition layer is made of Ti-Al nitride.

[0070] Keep the working gas as pure nitrogen, adjust the working pressure to a specific value between 0.5 and 5 Pa, and adjust the bias voltage to a specific value or linearly vary within a range between 20 and 250 V; adjust the electromagnetic control and permanent magnet control parameters of the target magnetic field for a row of Ti-Si targets; control the target working current to a specific value between 50 and 150 A, and turn on this row of Ti-Si targets to perform the sub-transition layer plating on the sheared blank for a specific duration between 30 and 200 minutes. The obtained sub-transition layer is made of Ti-Si nitride.

[0071] Replace the working gas with pure nitrogen and acetylene gas, and adjust the working pressure to a specific value between 0.5 and 5 Pa; control the flow rates of nitrogen and acetylene gas introduced into the mixer, and control the flow rate of acetylene gas to a specific value or a varying range between 0 and 400 ml / min; adjust the bias voltage to a specific value or linearly vary within a range between 20 and 250 V; adjust the electromagnetic control and permanent magnet control parameters of the target magnetic field for a row of Ti-Si targets; control the target working current to a specific value between 50 and 150 A, and turn on this row of Ti-Si targets to perform the functional layer plating on the sheared blank for a specific duration between 30 and 200 minutes. The obtained functional layer is made of Ti-Si carbonitride; by selecting Ti-Si targets with appropriate components and controlling the flow rates of nitrogen and acetylene gas, the Si content in the specific components of the prepared Ti-Si carbonitride functional layer is 13 at.%, and the C content is 10 at.%.

[0072] Comparative Example 1

[0073] The difference from Example 1 is that the Si content in the prepared TiSiCN functional layer is 3 at.%, and the C content is 7 at.%.

[0074] Comparative Example 2

[0075] The difference from Example 1 is that the Si content in the prepared TiSiCN functional layer is 6 at.%, and the C content is 15 at.%.

[0076] After completing the above coating process, the stationary blade and the moving blade of the electric hair clipper prepared in Example 1 are cooled and taken out of the furnace. After passing the sharpness inspection, they are assembled into a test sample of the electric hair clipper. Under the rated working voltage, its stable working current and temperature rise under the stable state are tested, and they are compared with the test sample of the uncoated electric hair clipper. The test results of the two are shown in Table 1.

[0077]

[0078] Table 1 Temperature of the stationary blade after stabilization for more than 10 minutes without lubricant before and after coating and working current of the electric hair clipper under the rated voltage

[0079] At the same time, the friction coefficient tests of the friction pairs of the examples and the comparative examples are respectively carried out to obtain Figure 2 the experimental results shown; it can be seen from Figure 2 that the change law of the coating system proposed by the present invention during the dry friction and rubbing process is: in the early stage of starting up, the friction running distance is about 0.2 km. Due to the influence of factors such as the surface roughness of the coating layer, the friction coefficient is relatively high. When the friction continues, the friction coefficient decreases to a relatively low value and stabilizes at this value; the friction coefficients corresponding to the TiSiCN functional layers with different Si and C element contents are different. Among them, the TiSiCN functional layer with a Si content of 13 at.% and a C content of 10 at.% has the lowest friction coefficient, and its friction coefficient after stabilization is lower than 0.2, far lower than the friction coefficient of quenched martensitic stainless steel (0.6 - 0.8).

[0080] Combining the test results in Table 1 and Figure 2 it can be seen that the coating system proposed in the examples of the present invention effectively reduces the surface temperature rise of the stationary blade. The temperature of the stationary blade surface is as low as 27 °C after 10 minutes of starting up, and it has good use comfort; at the same time, due to the small friction coefficient of the friction pair, the driving current is also significantly reduced compared with the uncoated electric hair clipper; therefore, the technical solution of the present invention can not only ensure the use comfort of the electric hair clipper, but also improve the service life of the battery, and improve the overall use performance of the electric hair clipper, especially the high-speed electric hair clipper, which has important significance for the market application of the high-speed electric hair clipper.

[0081] The above-described embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An electric hair clipper blade, characterized in that, Comprising: A blade substrate, on which a coating is provided, and the coating includes a transition layer and a functional layer; Wherein, the transition layer includes at least one layer formed by at least one of a nitride of TiAl and a nitride of TiSi, and the thermal conductivity of the transition layer is lower than that of the blade substrate; The functional layer is at least one layer formed by a carbonitride of TiSi, wherein the content of Si is greater than 0 at.% and less than 20 at.%, the content of C is greater than 0 at.% and less than 20 at.%, and at least one layer of the carbonitride of TiSi is located on the outermost side of the coating.

2. The electric clipper blade according to claim 1, wherein, The thermal conductivity of the functional layer is lower than that of the blade substrate.

3. The electric hair clipper blade according to claim 1, wherein, The transition layer includes at least one layer formed by a nitride of TiAl and at least one layer formed by a nitride of TiSi; Wherein, at least one layer of the nitride of TiSi is provided between any layer of the nitride of TiAl and the functional layer.

4. The electric clipper blade according to claim 1, wherein, At least one bonding layer is further provided between the blade substrate and the transition layer; The bonding layer is at least one of a transition metal, a transition metal nitride, or an alloy composed of a transition metal and an element of Group IIIA or IVA, or a nitride or carbonitride of the alloy; the transition metal element is at least one of elements of Group IVB, VB, and VIB.

5. The electric clipper blade according to claim 4, characterized in that, The content of N element or C element in the bonding layer increases or decreases in a gradient from the surface of the blade substrate to the direction away from the blade substrate; And / or, the N element in the transition layer increases or decreases in a gradient from the surface of the blade substrate to the direction away from the blade substrate.

6. The electric hair clipper blade according to claim 1, wherein, One or more layers of the transition layer and one or more layers of the functional layer form a periodic coating, and a plurality of the periodic coatings are stacked on the blade substrate.

7. A preparation method of an electric hair clipper blade, characterized in that, Including the following steps: Step 1, heat-treat the blank and process the heat-treated blank into a blade substrate of an electric hair clipper; Step 2, prepare a coating on the blade substrate by arc ion plating, first deposit at least one bonding layer, and then deposit a transition layer and a functional layer on the bonding layer; Wherein, the transition layer includes at least one layer formed by at least one of a nitride of TiAl and a nitride of TiSi; the functional layer is at least one layer formed by a carbonitride of TiSi, wherein the content of Si is greater than 0 at.% and less than 20 at.%, the content of C is greater than 0 at.% and less than 20 at.%, and at least one layer of the carbonitride of TiSi is located on the outermost side of the coating.

8. The preparation method of the electric clipper blade according to claim 7, characterized in that, The method for depositing the transition layer by arc ion plating includes: Maintain the working gas as pure nitrogen, set the working pressure in the range of 0.5 - 5 Pa, and set the bias voltage in the range of 20 - 250 V; Control the target working current in the range of 50 - 150 A, turn on the TiAl target or TiSi target for arc ion plating, and control the deposition time in the range of 30 - 200 min.

9. The preparation method of the electric hair clipper blade according to claim 7, characterized in that, The method for depositing the functional layer by arc ion plating includes: The working gas is selected as pure nitrogen and acetylene, and the working pressure is set in the range of 0.5 - 5 Pa; control the flow rates of nitrogen and acetylene introduced into the mixer, wherein the flow rate of acetylene is controlled in the range of 0 - 400 ml / min; the bias voltage is set in the range of 20 - 250 V. Control the target working current in the range of 50 - 150 A, turn on the TiSi target for arc ion plating, and control the deposition time in the range of 30 - 200 min.

10. An electric hair clipper, characterized in that, It includes the electric hair clipper blade described in any one of claims 1 - 6 or the electric hair clipper blade prepared by the preparation method of the electric hair clipper blade described in any one of claims 7 - 9.

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