CN113584438A - Periodic multilayer structure coating band saw blade and preparation method and application thereof - Google Patents
Periodic multilayer structure coating band saw blade and preparation method and application thereof Download PDFInfo
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- CN113584438A CN113584438A CN202110870998.0A CN202110870998A CN113584438A CN 113584438 A CN113584438 A CN 113584438A CN 202110870998 A CN202110870998 A CN 202110870998A CN 113584438 A CN113584438 A CN 113584438A
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- 230000000737 periodic effect Effects 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 239000010410 layer Substances 0.000 claims abstract description 93
- 239000002346 layers by function Substances 0.000 claims abstract description 54
- 238000000151 deposition Methods 0.000 claims abstract description 40
- 239000000758 substrate Substances 0.000 claims abstract description 38
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- 239000010959 steel Substances 0.000 claims abstract description 16
- 238000007733 ion plating Methods 0.000 claims abstract description 7
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- 238000005488 sandblasting Methods 0.000 claims description 20
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/0641—Nitrides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
- B23D61/12—Straight saw blades; Strap saw blades
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D65/00—Making tools for sawing machines or sawing devices for use in cutting any kind of material
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/0021—Reactive sputtering or evaporation
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/02—Pretreatment of the material to be coated
- C23C14/021—Cleaning or etching treatments
- C23C14/022—Cleaning or etching treatments by means of bombardment with energetic particles or radiation
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/02—Pretreatment of the material to be coated
- C23C14/028—Physical treatment to alter the texture of the substrate surface, e.g. grinding, polishing
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/24—Vacuum evaporation
- C23C14/32—Vacuum evaporation by explosion; by evaporation and subsequent ionisation of the vapours, e.g. ion-plating
- C23C14/325—Electric arc evaporation
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/54—Controlling or regulating the coating process
- C23C14/542—Controlling the film thickness or evaporation rate
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/58—After-treatment
- C23C14/584—Non-reactive treatment
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- Engineering & Computer Science (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physical Vapour Deposition (AREA)
Abstract
The invention discloses a periodic multilayer structure coating band saw blade and a preparation method thereof, and the band saw blade comprises a band saw blade substrate, and a CrN bonding layer, a CrN/AlCrN functional layer and an AlCrN top layer which are sequentially deposited on the outer surface of the band saw blade substrate; the CrN/AlCrN functional layer is obtained by alternately depositing a CrN layer and an AlCrN layer, and the periodic multilayer structure coating on the surface of the band saw blade substrate is prepared by an arc ion plating technology; the invention also discloses application of the periodic multilayer structure coating band saw blade, which is mainly used for saw cutting of thick-wall pipes and thick-wall steel components of petroleum pipelines, steam pipelines, boiler bodies and the like. According to the invention, the periodic multilayer structure design enables the coated band saw blade to show excellent mechanical properties and good toughness, and the sawing life is obviously prolonged.
Description
Technical Field
The invention relates to the field of preparation of coating materials for sawing band saw blades, in particular to a periodic multilayer structure coating band saw blade and a preparation method and application thereof.
Background
At present, the construction of accelerating the strong traffic countries and constructing modern energy systems is urgent, wherein nuclear power construction, deep sea and unconventional oil and gas resource development, ultra-high voltage power transmission, high-speed railways and other infrastructure fields all relate to the application and efficient cutting of various difficult-to-process materials. The blanking of thick-walled pipes and thick-walled steel components, such as oil pipelines, steam pipelines and boiler furnaces, is usually the first process step faced by these capital projects, and sawing is a common blanking method. The band saw blade is widely used in the field of metal raw material blanking by virtue of the advantages of high cutting efficiency, material and energy conservation, controllable cost and the like.
In the actual sawing and blanking process of thick-wall pipes and thick-wall steel component materials, on one hand, due to large saw cutting width change, the cutting force and impact load borne by a band saw blade in the sawing process can be changed rapidly, and tooth breakage or cracking failure is easy to occur; on the other hand, the application working condition of the thick-wall pipe and the thick-wall steel member has higher requirements on the comprehensive performance of the material, so that the sawing processing difficulty is improved, and the sawtooth is abraded too fast. Under the combined action of these two factors, the sawing life of the band saw blade is significantly reduced.
The hard coating prepared by Physical Vapor Deposition (PVD) is used as a chemical barrier and a thermal barrier, so that element diffusion and chemical reaction between a cutting tool and a processed material in the cutting process can be effectively avoided, and the PVD hard coating has the advantages of high hardness, high wear resistance, low friction coefficient and the like, so that the abrasion of the cutting tool is obviously reduced, the service life is prolonged, and the cutting efficiency is improved. By selecting a proper coating material, the abrasion of the cutting tool can be effectively reduced, excellent machining precision and surface quality are obtained, the service life of the cutting tool is prolonged, and the machining efficiency is improved.
At present, the domestic coated band saw blade is still in the blank field, the sawing and blanking of a thick-wall pipe and a thick-wall steel component are taken as a typical intermittent cutting working condition, and higher requirements are provided for the wear resistance and the shock load resistance of the saw teeth of the band saw blade. Through the design and research of PVD hard coating material components and microstructures, the periodic multilayer structure coating with excellent hardness and toughness is prepared, the sawing service life of the band saw blade is prolonged, and the collaborative improvement of the sawing processing quality, cost and efficiency of the band saw blade is hopefully realized.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to solve the technical problem of providing a periodic multilayer structure coating band saw blade with excellent hardness, toughness, wear resistance, friction reduction and saw cutting life, and a preparation method and application thereof
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a periodic multilayer structure coated band saw blade characterized in that: comprises a band saw blade substrate, and a CrN combination layer, a CrN/AlCrN functional layer and an AlCrN top layer which are deposited on the band saw blade substrate in sequence; the CrN/AlCrN functional layer is obtained by alternately depositing a CrN layer and an AlCrN layer.
Furthermore, the thickness of the CrN bonding layer is 0.2-0.5 μm, the thickness of the CrN/AlCrN functional layer is 1.0-3.5 μm, and the thickness of the AlCrN top layer is 0.5-2.0 μm.
Furthermore, the modulation period of the CrN/AlCrN functional layer is 5-50 nm, and the modulation ratio is 1: 1-1: 4. Two adjacent CrN layers and AlCrN layers in the CrN/AlCrN functional layer are an alternating unit, the sum of the thicknesses of the adjacent CrN layers and the AlCrN layers in each alternating unit is a modulation period, and the ratio of the thicknesses of the adjacent CrN layers and the AlCrN layers is a modulation ratio.
Further, the atomic percentages of the elements of the AlCrN layer in the AlCrN top layer and the CrN/AlCrN functional layer are as follows: 15.0-30.0 at.% Al, 20.0-30.0 at.% Cr, and 40.0-60.0 at.% N; the CrN bonding layer and the CrN/AlCrN functional layer have the elements of 45.0-55.0 at.% of Cr and 45.0-55.0 at.% of N.
Furthermore, the saw tooth material of the band saw blade base body is high-speed steel or hard alloy, and the saw blade body material of the saw blade base body is spring steel.
Based on the same inventive concept, the invention also provides a preparation method of any one of the periodic multilayer structure coating band saw blades, which comprises the following steps:
s1: pretreating a band saw blade substrate;
s2: depositing a CrN binding layer on the surface of the band saw blade substrate pretreated by S1 through arc ion plating;
s3: on the CrN bonding layer obtained in S2, a CrN/AlCrN functional layer is obtained through an arc ion plating multi-target alternate deposition mode;
s4: depositing a CrN/AlCrN functional layer obtained in S3 by arc ion plating to obtain an AlCrN top layer;
s5: the resulting periodic multilayer structure coated saw blade of S4 was post-treated.
Further, in S1, the preprocessing specifically includes: after sand blasting passivation treatment is carried out on a band saw blade substrate, the band saw blade substrate passes through an ultrasonic cleaning machine filled with a metal cleaning agent solution at the speed of 1-10 m/min, and finally nitrogen is dried and wound on a workpiece rotating frame in a vacuum chamber of coating equipment, and the revolution speed of the rotating frame is set to be 0.1-10.0 rpm; when the temperature reaches 350-550 ℃, the vacuum degree reaches 1.0-9.0 multiplied by 10-3When Pa is needed, Ar gas is introduced, the air pressure is adjusted to 0.3 Pa-3.0 Pa, the ion source is started, the power is 0.5 kW-10.0 kW, the workpiece support is biased to-100V-1000V, and the surface of the substrate with the saw blade is etched for 25 min-90 min.
Further, in S2, the deposition parameters of the CrN bonding layer are: introduction of N2Adjusting the air pressure to 0.5-5.0 Pa, setting the bias voltage to-30V-250V, starting a Cr arc target, wherein the target current is 60-200A, and the deposition time of the CrN bonding layer is 5-20 min;
further, in S3, the deposition parameters of the CrN/AlCrN functional layer are: firstly introducing N2Adjusting the air pressure to 0.5-5.0 Pa, setting the bias voltage to-60-250V, starting the Cr and AlCr arc targets at the same time, wherein the Cr target current is 60-200A, the AlCr arc target current is 60-200A, and the CrN/AlCrN functional layer is deposited for 30-60 min;
further, in S4, the deposition parameters of the AlCrN top layer are: introduction of N2And gas, adjusting the air pressure to 0.5 Pa-5.0 Pa, setting the bias voltage to-60V-250V, starting the AlCr arc target, controlling the target current to 60A-200A, and controlling the deposition time of the AlCrN top layer to 15 min-45 min.
Further, in S5, the post-processing specifically includes: and (3) unfolding the coated band saw blade, and carrying out sand blasting on the saw blade body with the band saw blade through a dry sand blasting machine at the speed of 1-10 m/min, and rewinding the band saw blade after sand blasting.
The preparation of PVD hard coatings generally needs to be carried out in a temperature range of 300 ℃ to 500 ℃. In a high-temperature vacuum environment, the residual compressive stress on the surface of the saw blade body can be partially released or even eliminated under the annealing action, so that the fatigue resistance of the saw blade body is remarkably reduced, and the sawing performance of the coated band saw blade is adversely affected. The sawing performance of the band saw blade requires that the saw teeth have excellent wear resistance and red hardness, and also requires that the saw blade body has toughness and fatigue resistance. Therefore, the residual compressive stress is introduced to the surface of the saw blade body by the coated band saw blade through sand blasting post-treatment, and the fatigue resistance of the saw blade body can be improved.
Based on the same inventive concept, the invention also provides the periodic multilayer structure coating band saw blade and application of the periodic multilayer structure coating band saw blade prepared by the preparation method, and the periodic multilayer structure coating band saw blade is used for sawing thick-wall pipes and thick-wall steel components.
Furthermore, the thick-wall pipe mainly comprises any one of a petroleum pipeline, a steam pipeline, a boiler body and the like, and the thick-wall steel member mainly comprises any one of I-steel, angle steel, channel steel and other special-shaped steel members and the like.
The periodic multilayer structure coating band saw blade consists of a band saw blade base body, a CrN combining layer, a CrN/AlCrN functional layer and an AlCrN top layer, wherein the CrN combining layer, the CrN/AlCrN functional layer and the AlCrN top layer are sequentially deposited on the outer surface of the band saw blade base body. The CrN bonding layer can enhance the film-substrate bonding force and provide support for the multilayer structure; the CrN/AlCrN functional layer can interrupt the continuous growth of columnar crystals in a single AlCrN or CrN coating by the periodic change of the modulation component and the structure, thereby realizing the grain refinement and leading the coating structure to be compact; by combining with the material microstructure design, the modulation period and the modulation ratio are flexibly regulated and controlled according to the specific sawing working condition, so that coherent or semi-coherent epitaxial growth occurs between different modulation layers, excellent hardness and toughness and longer sawing service life can be provided, and the method is suitable for the sawing working conditions of thick-wall pipes and thick-wall steel components; the AlCrN top layer provides excellent toughness, high temperature oxidation resistance, and red hardness.
The method for preparing the band saw blade coating is a physical vapor deposition method, the hard coating prepared by Physical Vapor Deposition (PVD) is used as a chemical barrier and a thermal barrier, element diffusion and chemical reaction between a cutting tool and a processed material in the cutting process can be effectively avoided, and the PVD hard coating has the advantages of high hardness, high wear resistance, low friction coefficient and the like, so that the abrasion of the cutting tool is remarkably reduced, the service life is prolonged, and the cutting efficiency is improved.
Compared with the prior art, the invention has the beneficial effects that: firstly, the hardness and the toughness can be simultaneously achieved, and the sawing service life is longer; secondly, the saw blade coating introduces residual compressive stress on the surface of the saw blade body through sand blasting, so that the fatigue resistance of the saw blade body can be improved; the preparation process is simple, the operability is strong, and the cooperative improvement of the sawing quality, the cost and the efficiency can be realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of a periodic multilayer coated saw blade according to the present invention.
FIG. 2 is a graph of the ball-pan friction coefficient at 800 ℃ for the same furnace coated high speed steel coupons as the saw blade tooth material from example 1 and comparative example 1.
FIG. 3 is a comparison of the sawing life of an uncoated band saw blade and a coated band saw blade prepared in example 1 with the same tooth form specification for sawing seamless thick-walled steel pipes with different dimension specification P91.
Detailed Description
The invention provides a periodic multilayer structure coated band saw blade and a preparation method and application thereof, and a person skilled in the art can realize the periodic multilayer structure coated band saw blade by properly improving process parameters by referring to the content. It is expressly intended that all such similar substitutes and modifications apparent to those skilled in the art are deemed to be within the scope of the invention. While the methods and applications of this invention have been described in terms of preferred embodiments, it will be apparent to those of ordinary skill in the art that variations and modifications in the methods and applications described herein, as well as other suitable variations and combinations, may be made to implement and use the techniques of this invention without departing from the spirit and scope of the invention.
Embodiments of the present invention will be described in detail with reference to examples.
Example 1
A periodic multilayer structure coating band saw blade comprises a band saw blade substrate (the material of sawteeth is high-speed steel), and a CrN bonding layer, a CrN/AlCrN functional layer and an AlCrN top layer which are sequentially deposited on the outer surface of the band saw blade substrate; the modulation ratio of the CrN/AlCrN functional layer is 1:3, and the modulation period is 10 nm; the CrN layer in the CrN combination layer and the CrN/AlCrN functional layer comprises the following elements in atomic percentage: 49.5 at.% Cr, 50.5 at.% N; the AlCrN top layer and the AlCrN/AlCrN functional layer comprise the following elements in atomic percentage: 23.0 at.% of Al, 22.0 at.% of Cr, and 55.0 at.% of N.
S1 pretreatment: after sand blasting passivation treatment is carried out on a band saw blade substrate, the band saw blade substrate passes through an ultrasonic cleaning machine filled with a metal cleaning agent solution at the speed of 4m/min, then is rinsed by deionized water, is dried by nitrogen and then is loaded on a workpiece rotating frame in a vacuum chamber, and the revolution speed of the workpiece rotating frame is set to be 3 rpm; the heater is turned on to heat the cavityVacuum pumping the cavity to a vacuum degree higher than 3.0 × 10 at 450 deg.C-3Pa; introducing Ar gas into an ion source, adjusting the internal air pressure of the chamber to be 3.0Pa, setting the power of the ion source to be 5.0kW, setting the bias voltage of a workpiece rotating frame to be-600V, and etching the surface of the metal matrix for 40 min;
s2 preparation of CrN bonding layer: the bias voltage is adjusted to-80V, the Ar gas is closed, and N is introduced2Starting a Cr target, adjusting the air pressure to 4.0Pa, controlling the target current of the arc target to be 80A, and controlling the deposition time to be 5 min; adjusting the deposition bias voltage to-150V, keeping the air pressure and target current parameters unchanged, and continuing to deposit for 10min to obtain a CrN bonding layer;
s3 preparation of a CrN/AlCrN functional layer: keeping the air pressure and the bias voltage unchanged, simultaneously starting a Cr target and an AlCr target, wherein the target current of the AlCr target is 180A, the target current of the Cr target is 80A, and the deposition time is 30 min;
s4 preparation of AlCrN top layer: closing the Cr target, keeping the air pressure and the bias voltage unchanged, adjusting the current of the AlCr target to 150A, and depositing an AlCrN top layer for 15 min;
and S5 post-processing: and after the deposition is finished, inflating the vacuum chamber and taking out the coated band saw blade when the temperature of the vacuum chamber is reduced to be below 150 ℃, and then carrying out sand blasting post-treatment on the coated band saw blade.
Wherein the thickness of the CrN bonding layer on the surface of the furnace-associated high-speed steel sample block is 0.4 mu m, the thickness of the CrN/AlCrN functional layer is 3.4 mu m, and the thickness of the AlCrN top layer is 1.0 mu m.
TABLE 1 thickness, hardness, modulus of elasticity and H/E of surface coatings of furnace-mounted high speed steel sample blocks of example 1 and comparative example 1*Ratio of
Comparative example 1
A coated band saw blade comprises a band saw blade substrate (the material of sawteeth is high-speed steel), and a CrN bonding layer and an AlCrN functional layer which are sequentially deposited on the outer surface of the band saw blade substrate; the CrN bonding layer comprises the following elements in atomic percentage: 49.5 at.% Cr, 50.5 at.% N; the AlCrN functional layer comprises the following elements in atomic percentage: 23.0 at.% of Al, 22.0 at.% of Cr, and 55.0 at.% of N.
S1 pretreatment: after sand blasting passivation treatment is carried out on a band saw blade substrate, the band saw blade substrate passes through an ultrasonic cleaning machine filled with a metal cleaning agent solution at the speed of 4m/min, then is rinsed by deionized water, is dried by nitrogen and then is loaded on a workpiece rotating frame in a vacuum chamber, and the revolution speed of the workpiece rotating frame is set to be 3 rpm; opening the heater to heat the cavity to 450 deg.C, and vacuumizing the cavity to make the vacuum degree higher than 3.0 × 10-3Pa; introducing Ar gas into an ion source, adjusting the internal air pressure of the chamber to be 3.0Pa, setting the power of the ion source to be 5.0kW, setting the bias voltage of a workpiece rotating frame to be-600V, and etching the surface of the metal matrix for 40 min;
s2 preparation of CrN bonding layer: the bias voltage is adjusted to-80V, the Ar gas is closed, and N is introduced2Starting a Cr target, adjusting the air pressure to 4.0Pa, controlling the target current of the arc target to be 80A, and controlling the deposition time to be 5 min; adjusting the deposition bias voltage to-150V, keeping the air pressure and target current parameters unchanged, and continuing to deposit for 10min to obtain a CrN bonding layer;
s3 preparation of an AlCrN functional layer: closing the Cr target, keeping the air pressure and the bias voltage unchanged, adjusting the current of the AlCr target to 150A, and depositing an AlCrN top layer for 60 min;
and S4 post-processing: and after the deposition is finished, inflating the vacuum chamber and taking out the coated band saw blade when the temperature of the vacuum chamber is reduced to be below 150 ℃, and then carrying out sand blasting post-treatment on the coated band saw blade.
Wherein the thickness of the CrN bonding layer on the surface of the furnace-associated high-speed steel sample block is 0.4 mu m, and the thickness of the AlCrN functional layer is 4.1 mu m.
Table 1 shows the coating thickness, nanoindentation hardness, modulus of elasticity, and H/E of example 1 and comparative example 1 on the in-furnace high-speed steel coupons*A ratio. As can be seen from Table 1, the hardness and H/E of example 1 were similar in the thickness of the coating layer*The ratio is significantly increased relative to comparative example 1, which demonstrates that the periodic multilayer structure of the present invention enables nitride coatings to achieve both excellent hardness and toughness.
FIG. 2 shows the coefficient of friction of a ball pan of a furnace-coated high-speed steel sample block prepared in example 1 and comparative example 1, which is the same as the saw-tooth material of a band saw blade, at a temperature of 800 ℃ under specific test conditions including a pair of grinding ballsIs made of Al2O3Diameter 6mm, grinding scar radius 2mm, load 5N, sample rotation rate 20 cm/s. Owing to the synergistic improvement of the mechanical property and the toughness of the coating, the friction coefficient of the coating in example 1 is obviously reduced compared with that of the coating in comparative example 1, and the coating shows excellent antifriction performance.
FIG. 3 is a comparison of the sawing life of an uncoated band saw blade and a coated band saw blade prepared in example 1 with the same tooth form specification for sawing seamless thick-walled steel pipes with different dimension specification P91. As can be seen from the figure, compared with the uncoated band saw blade, the sawing life of the coated band saw blade prepared in example 1 for sawing the P91 seamless thick-walled steel pipes with different dimensions is improved by more than 40%, which indicates that the nano multilayer structure of the present invention can improve the sawing life of the coated band saw blade.
Example 2
A periodic multilayer structure coating band saw blade comprises a band saw blade substrate (the material of sawteeth is high-speed steel), and a CrN bonding layer, a CrN/AlCrN functional layer and an AlCrN top layer which are sequentially deposited on the outer surface of the band saw blade substrate; the modulation ratio of the CrN/AlCrN functional layer is as follows: 1:1, and the modulation period is 15 nm; the CrN layer in the CrN combination layer and the CrN/AlCrN functional layer comprises the following elements in atomic percentage: 50.1 at.% Cr, 49.9 at.% N; the AlCrN top layer and the AlCrN/AlCrN functional layer comprise the following elements in atomic percentage: 25.0 at.% Al, 25.0 at.% Cr, and 50.0 at.% N.
S1 pretreatment: after sand blasting passivation treatment is carried out on a band saw blade substrate, the band saw blade substrate passes through an ultrasonic cleaning machine filled with a metal cleaning agent solution at the speed of 3m/min, then is rinsed by deionized water, is dried by nitrogen and then is loaded on a workpiece rotating frame in a vacuum chamber, and the revolution speed of the rotating frame is set to be 2 rpm; the heater is turned on to heat the cavity to 450 ℃, and the cavity is vacuumized to ensure that the vacuum degree is higher than 5.0 multiplied by 10-3Pa; introducing Ar gas into an ion source, adjusting the internal air pressure of the chamber to be 3.0Pa, setting the power of the ion source to be 6.0kW, setting the bias voltage of a workpiece rotating frame to be-800V, and etching the surface of the metal matrix for 30 min;
s2 preparation of CrN bonding layer: the bias voltage is adjusted to-100V, the Ar gas is closed, and N is introduced2Gas, starting Cr target, regulating gas pressure to 3.0Pa, arcThe target current of the target is 100A, and the deposition time is 7 min;
s3 preparation of a CrN/AlCrN functional layer: keeping the air pressure and the bias voltage unchanged, and simultaneously starting a Cr target and an AlCr target, wherein the target current of the AlCr target is 140A, the target current of the Cr target is 100A, and the deposition time is 30 min;
s4 preparation of AlCrN top layer: closing the Cr target, keeping the air pressure and the bias voltage unchanged, adjusting the current of the AlCr target to 120A, and setting the deposition time to 20 min;
and S5 post-processing: and after the deposition is finished, inflating the vacuum chamber and taking out the coated band saw blade when the temperature of the vacuum chamber is reduced to be below 150 ℃, and then carrying out sand blasting post-treatment on the coated band saw blade.
Wherein the thickness of the CrN bonding layer on the surface of the furnace-associated high-speed steel sample block is 0.5 mu m, the thickness of the CrN/AlCrN functional layer is 2.0 mu m, and the thickness of the AlCrN top layer is 0.8 mu m.
Example 3
A multi-coating band saw blade comprises a band saw blade substrate (the sawteeth are made of hard alloy), and a CrN bonding layer, a CrN/AlCrN functional layer and an AlCrN top layer which are sequentially deposited on the outer surface of the band saw blade substrate; the modulation ratio of the CrN/AlCrN functional layer is 1:2, and the modulation period is 9 nm; the CrN layer in the CrN combination layer and the CrN/AlCrN functional layer comprises the following elements in atomic percentage: 50.4 at.% Cr, 49.6 at.% N; the AlCrN top layer and the AlCrN/AlCrN functional layer comprise the following elements in atomic percentage: 22.1 at.% Al, 26.8 at.% Cr and 51.1 at.% N.
S1 pretreatment: after sand blasting passivation treatment is carried out on a band saw blade substrate, the band saw blade substrate passes through an ultrasonic cleaning machine filled with a metal cleaning agent solution at the speed of 3m/min, then is rinsed by deionized water, is dried by nitrogen and then is loaded on a workpiece rotating frame in a vacuum chamber, and the revolution speed of the rotating frame is set to be 3 rpm; opening the heater to heat the cavity to 550 deg.C, and vacuumizing the cavity to make the vacuum degree higher than 4.0 × 10-3Pa; introducing Ar gas into an ion source, adjusting the internal air pressure of the chamber to be 2.0Pa, setting the power of the ion source to be 6.0kW, setting the bias voltage of a workpiece support to be-800V, and etching the surface of the metal matrix for 30 min;
s2 preparation of CrN bonding layer: the bias voltage is adjusted to-100V, the Ar gas is closed, and N is introduced2Gas, start Cr target, regulateThe pressure is reduced to 3.0Pa, the target current of the arc target is 80A, and the deposition time is 10 min;
s3 preparation of a CrN/AlCrN functional layer: firstly, mounting the band saw blade obtained in the step S2 on a rotating frame, keeping the air pressure and the bias voltage unchanged, simultaneously starting a Cr target and an AlCr target, wherein the target current of the AlCr target is 120A, the target current of the Cr target is 80A, and the deposition time is 30 min;
s4 preparation of AlCrN top layer: closing the Cr target, keeping the air pressure and the bias voltage unchanged, adjusting the current of the AlCr target to 120A, and setting the deposition time to 30 min;
and S5 post-processing: and after the deposition is finished, inflating the vacuum chamber and taking out the coated band saw blade when the temperature of the vacuum chamber is reduced to be below 150 ℃, and then carrying out sand blasting post-treatment on the coated band saw blade.
Wherein the thickness of the CrN bonding layer on the surface of the furnace-associated high-speed steel sample block is 0.3 mu m, the thickness of the CrN/AlCrN functional layer is 1.9 mu m, and the thickness of the AlCrN top layer is 1.1 mu m.
Example 4
A multi-coating band saw blade comprises a band saw blade substrate (the sawteeth are made of hard alloy), and a CrN bonding layer, a CrN/AlCrN functional layer and an AlCrN top layer which are sequentially deposited on the outer surface of the band saw blade substrate; the modulation ratio of the CrN/AlCrN functional layer is as follows: 1:2, the modulation period is 16 nm; the CrN layer in the CrN combination layer and the CrN/AlCrN functional layer comprises the following elements in atomic percentage: 50.6 at.% Cr, 49.4 at.% N; the AlCrN top layer and the AlCrN/AlCrN functional layer comprise the following elements in atomic percentage: 20.2 at.% of Al, 28.8 at.% of Cr and 51.0 at.% of N.
S1 pretreatment: after sand blasting passivation treatment is carried out on a band saw blade substrate, the band saw blade substrate passes through an ultrasonic cleaning machine filled with a metal cleaning agent solution at the speed of 4m/min, then is rinsed by deionized water, is dried by nitrogen and then is loaded on a workpiece rotating frame in a vacuum chamber, and the revolution speed of the rotating frame is set to be 1.5 rpm; opening the heater to heat the cavity to 550 deg.C, and vacuumizing the cavity to make the vacuum degree higher than 1.0 × 10-3Pa; introducing Ar gas into an ion source, adjusting the internal air pressure of the chamber to be 2.0Pa, setting the power of the ion source to be 4.0kW, setting the bias voltage of a workpiece rotating frame to be-1000V, and etching the surface of the metal matrix for 30 min;
s2 preparation of CrN bonding layer: will be provided withThe bias voltage is adjusted to-100V, the Ar gas is closed, and N is introduced2Starting a Cr target, adjusting the air pressure to 2.0Pa, controlling the target current of the arc target to be 80A, and controlling the deposition time to be 10 min;
s3 preparation of a CrN/AlCrN functional layer: keeping the air pressure and the bias voltage unchanged, simultaneously starting a Cr target and an AlCr target, wherein the target current of the AlCr target is 130A, the target current of the Cr target is 90A, and the deposition time is 35 min;
s4 preparation of AlCrN top layer: closing the Cr target, keeping the air pressure and the bias voltage unchanged, adjusting the current of the AlCr target to 150A, and setting the deposition time to 20 min;
and S5 post-processing: and after the deposition is finished, inflating the vacuum chamber and taking out the coated band saw blade when the temperature of the vacuum chamber is reduced to be below 150 ℃, and then carrying out sand blasting post-treatment on the coated band saw blade.
Wherein the thickness of the CrN bonding layer on the surface of the furnace-associated high-speed steel sample block is 0.4 mu m, the thickness of the CrN/AlCrN functional layer is 2.9 mu m, and the thickness of the AlCrN top layer is 1.5 mu m.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A periodic multilayer structure coated band saw blade characterized in that: comprises a band saw blade substrate, and a CrN bonding layer, a CrN/AlCrN functional layer and an AlCrN top layer which are sequentially deposited on the outer surface of the band saw blade substrate; the CrN/AlCrN functional layer is obtained by alternately depositing a CrN layer and an AlCrN layer.
2. The band saw blade according to claim 1, wherein the CrN bonding layer has a thickness of 0.2 to 0.5 μm, the CrN/AlCrN functional layer has a thickness of 1.0 to 3.5 μm, and the AlCrN top layer has a thickness of 0.5 to 2.0 μm.
3. The band saw blade with the periodic multilayer structure coating as claimed in claim 1, wherein the modulation period of the CrN/AlCrN functional layer is 5nm to 50nm, and the modulation ratio is 1:1 to 1: 4.
4. The band saw blade with periodic multilayer structure coating according to claim 1, wherein the AlCrN layer of the AlCrN top layer and the CrN/AlCrN functional layer has the following elements by atomic percentage: 15.0-30.0 at.% Al, 20.0-30.0 at.% Cr, and 40.0-60.0 at.% N; the CrN bonding layer and the CrN/AlCrN functional layer have the elements of 45.0-55.0 at.% of Cr and 45.0-55.0 at.% of N.
5. The band saw blade with periodic multilayer structure coating according to claim 1, wherein the material of the teeth of the band saw blade base is high speed steel or hard alloy, and the material of the blade body base is spring steel.
6. The method for manufacturing a band saw blade with periodic multilayer structure coating according to any one of claims 1 to 5, comprising the steps of:
s1: pretreating a band saw blade substrate;
s2: depositing a CrN binding layer on the surface of the band saw blade substrate pretreated by S1 through arc ion plating;
s3: on the CrN bonding layer obtained in S2, a CrN/AlCrN functional layer is obtained through an arc ion plating multi-target alternate deposition mode;
s4: depositing a CrN/AlCrN functional layer obtained in S3 by arc ion plating to obtain an AlCrN top layer;
s5: the resulting periodic multilayer structure coated saw blade of S4 was post-treated.
7. The preparation method according to claim 6, wherein in S1, the pretreatment is specifically: after sand blasting passivation treatment is carried out on a band saw blade substrate, the band saw blade substrate passes through an ultrasonic cleaning machine filled with a metal cleaning agent solution at the speed of 1-10 m/min, and finally nitrogen is dried and wound on a workpiece rotating frame in a vacuum chamber of coating equipment, and the revolution speed of the rotating frame is set to be 0.1-10.0 rpm; when the temperature reaches 350-550 ℃, the vacuum degree reaches 1.0-9.0 multiplied by 10-3When Pa is needed, Ar gas is introduced, the air pressure is adjusted to 0.3 Pa-3.0 Pa, the ion source is started, the power is 0.5 kW-10.0 kW, the workpiece support is biased to-100V-1000V, and the surface of the substrate with the saw blade is etched for 25 min-90 min.
8. The method of claim 6, wherein:
in S2, the deposition parameters of the CrN bonding layer are: introduction of N2Adjusting the air pressure to 0.5-5.0 Pa, setting the bias voltage to-30V-250V, starting a Cr arc target, wherein the target current is 60-200A, and the deposition time of the CrN bonding layer is 5-20 min;
in S3, the deposition parameters of the CrN/AlCrN functional layer are: introduction of N2Adjusting the air pressure to 0.5-5.0 Pa, setting the bias voltage to-60-250V, starting the Cr and AlCr arc targets at the same time, wherein the Cr target current is 60-200A, the AlCr arc target current is 60-200A, and the CrN/AlCrN functional layer is deposited for 30-60 min;
in S4, the deposition parameters of the AlCrN top layer are: introduction of N2And gas, adjusting the air pressure to 0.5 Pa-5.0 Pa, setting the bias voltage to-60V-250V, starting the AlCr arc target, controlling the target current to 60A-200A, and controlling the deposition time of the AlCrN top layer to 15 min-45 min.
9. The method of claim 6, wherein: in S5, the post-processing specifically includes: and (3) unfolding the coated band saw blade, and carrying out sand blasting on the saw blade body with the band saw blade through a dry sand blasting machine at the speed of 1-10 m/min, and rewinding the band saw blade after sand blasting.
10. Use of a periodic multilayer coated band saw blade according to any one of claims 1 to 5 or produced by the production method according to any one of claims 5 to 9 for sawing thick-walled pipes and thick-walled steel components.
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| CN114196912A (en) * | 2021-11-18 | 2022-03-18 | 湖南泰嘉新材料科技股份有限公司 | Periodic multilayer nano-structure nitride hard coating band saw blade and preparation method and application thereof |
| CN114318226A (en) * | 2021-12-23 | 2022-04-12 | 广东工业大学 | AlCrN/WN multilayer structure hard coating for titanium alloy cutting and preparation method and application thereof |
| CN118127475A (en) * | 2024-04-01 | 2024-06-04 | 江苏美特森切削工具有限公司 | High-toughness bimetal band saw blade and preparation method thereof |
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| CN103898445A (en) * | 2014-04-18 | 2014-07-02 | 常州多晶涂层科技有限公司 | Multilayer AlCrN cutting tool coating and preparation method thereof |
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| CN114318226A (en) * | 2021-12-23 | 2022-04-12 | 广东工业大学 | AlCrN/WN multilayer structure hard coating for titanium alloy cutting and preparation method and application thereof |
| CN118127475A (en) * | 2024-04-01 | 2024-06-04 | 江苏美特森切削工具有限公司 | High-toughness bimetal band saw blade and preparation method thereof |
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