CN115074661A - Preparation method of high-temperature wear-resistant composite steel rolling roll collar - Google Patents
Preparation method of high-temperature wear-resistant composite steel rolling roll collar Download PDFInfo
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- CN115074661A CN115074661A CN202211002758.XA CN202211002758A CN115074661A CN 115074661 A CN115074661 A CN 115074661A CN 202211002758 A CN202211002758 A CN 202211002758A CN 115074661 A CN115074661 A CN 115074661A
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- 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
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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
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- C23C14/0021—Reactive sputtering or evaporation
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- 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
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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
- C23C14/02—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
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/0641—Nitrides
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- 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
- C23C14/0664—Carbonitrides
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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
- C23C14/14—Metallic material, boron or silicon
- C23C14/16—Metallic material, boron or silicon on metallic substrates or on substrates of boron or silicon
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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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Abstract
The application relates to the technical field of new materials for steel rolling roll collars, in particular to a preparation method of a high-temperature wear-resistant composite steel rolling roll collar, the high-temperature wear-resistant composite steel rolling roll collar is composed of a base body and a high-temperature wear-resistant coating, the high-temperature wear-resistant coating is coated on the base body, and the preparation method of the high-temperature wear-resistant coating coated on the base body comprises the following steps: pre-treating; carrying out vacuum heating treatment; ion cleaning treatment; coating treatment; cooling; polishing treatment: and polishing the film-coated workpiece subjected to cooling treatment to obtain the high-temperature wear-resistant composite steel rolling roll collar. The surface of a substrate is coated with a high-temperature wear-resistant coating which prevents high-temperature wires and bars from directly contacting the substrate; meanwhile, the surface of the high-temperature wear-resistant coating is smooth and fine, so that the friction coefficient between a product and the high-temperature wear-resistant composite steel rolling roll collar is reduced, the online time of the high-temperature wear-resistant composite steel rolling roll collar is prolonged, and the purpose of improving the yield is achieved.
Description
Technical Field
The application relates to the technical field of new materials for steel rolling roll collars in steel rolling machinery, in particular to a preparation method of a high-temperature wear-resistant composite steel rolling roll collar.
Background
The prior roll collar is provided with grooves for rolling wires on the outer circle of the roll collar according to production requirements and then is installed on a finishing mill group (dozens to twenty-few stands) for paired use. In the production process, the surface of the roller ring groove is abraded due to high temperature, high speed and high pressure, the roller ring is consumed quickly, the roller ring is aged for 2 hours and about 20 hours for general high-speed wire rods, the specification of rolled finished products exceeds the standard, the surface is rough, and the machine needs to be stopped for roller replacement.
The replaced roll collar needs to be subjected to groove shape grinding and outer diameter grinding, and when the outer diameter of the roll collar is ground to a specified size (grinding for 9-20 times), the roll collar is off-line and scrapped. From the nature of the work it can be seen that a roll collar should consist of two parts:
1. the consumed part, namely the working layer, is required to have high hardness, good wear resistance and large rolling quantity; 2. the scrapped part, namely the substrate, is required to have good toughness, high strength and no fragmentation.
The roll collar produced by the prior art is sintered by a conventional hard alloy material (the main component is tungsten carbide) with a single component, and has an integral structure; the requirements of strength and toughness of the matrix are met, and the requirements of hardness and wear resistance of the working layer part are lost; and the requirements of hardness and wear resistance of the working layer part are met, the requirements of strength and toughness of the matrix are lost, and the fracture is easy to occur in use.
The roll collar needs to be repeatedly grinded to meet the use requirement, and the grinding to a certain degree can cause the production accidents of roll collar cracking, crushing and the like when being continuously used. The scrapping treatment is generally carried out for no more than 20 days of continuous production, and the scrapped roll collars are generally used for less than one third of the whole roll collars. The unit price of a single roller of the hard alloy roller is different from 11000 to 18000.
The existing roll collar frequently changes rolls to influence the yield, and the roll collar is scrapped in a short period to improve the steel rolling cost, which is one of the difficult problems which puzzle the wire steel rolling industry for a long time.
Disclosure of Invention
In order to solve the technical problems mentioned in the background technology or at least partially solve the technical problems, the application provides a preparation method of a high-temperature wear-resistant composite steel rolling roll collar.
The application provides a preparation method of a high-temperature wear-resistant composite steel rolling roll collar, the high-temperature wear-resistant composite steel rolling roll collar is composed of a base body and a high-temperature wear-resistant coating, the high-temperature wear-resistant coating is coated on the base body, and the preparation method of the high-temperature wear-resistant coating coated on the base body comprises the following steps:
s1, pretreatment: pretreating the substrate;
s2, vacuum heating treatment: putting the pretreated substrate into a vacuum chamber for heating treatment and pressure maintaining treatment, wherein the temperature during heating treatment is 350-550 ℃, and the pressure during pressure maintaining treatment is (3-8) × 10 -3 Pa；
S3, ion cleaning treatment: introducing argon/helium gas into the vacuum chamber, controlling the air pressure to be 0.33-2 Pa, simultaneously applying pulse negative bias to the substrate to be-800-50V, after the argon/helium gas ion bombards the substrate for a period of time, starting an ion source to enhance gas glow discharge so as to perform ion cleaning treatment on the surface of the heated and pressure-maintained substrate, wherein the time of the ion cleaning treatment is 40-120 minutes;
s4, coating treatment: carrying out film coating treatment on the substrate subjected to the ion cleaning treatment to form a film coating workpiece;
s5, cooling: naturally cooling the coated workpiece obtained by coating treatment, and taking out the coated workpiece after the temperature of the coated workpiece is reduced to below 100 ℃;
s6, polishing treatment: and polishing the film-coated workpiece subjected to cooling treatment to obtain the high-temperature wear-resistant composite steel rolling roll collar.
In step S1, the preprocessing specifically includes the following steps: firstly, carrying out sand blasting treatment on the matrix; then, cleaning the matrix subjected to sand blasting; and finally, drying the cleaned matrix.
The cleaning treatment specifically comprises the following steps: and sequentially carrying out high-pressure water column spraying, ultrasonic cleaning and deionized water rinsing on the matrix subjected to sand blasting treatment.
The sand blasting treatment specifically comprises the following steps: use SY-ZPT-4A duplex position dry-type sand blasting machine, and adopt 300 ~ 500 mesh white alundum, right all surfaces of base member all carry out sand blasting, just sand blasting's pressure is 0.3 ~ 0.6Mpa, sand blasting equipment's nozzle is apart from the distance of base member is 5 ~ 15cm, the base member follows sand blasting equipment's work platform rotates in step, just the nozzle reciprocates simultaneously, and the sandblast time is 5 ~ 10 minutes.
In step S2, the pressure maintaining time is 90 to 240 minutes.
The high-pressure water column spraying specifically comprises the following steps: and (2) carrying out high-pressure water column spraying on the matrix by adopting an alkaline metal surface active agent with the mass ratio of 3%, wherein the high-pressure spraying treatment time is 5-15 minutes.
The ultrasonic cleaning specifically comprises the following steps: firstly, carrying out ultrasonic rough washing on the substrate by adopting an alkaline metal surface cleaning agent with the molar concentration of 6%, wherein the temperature of the ultrasonic rough washing is 50-75 ℃, and the time of the ultrasonic rough washing is 5-15 minutes;
and then, carrying out ultrasonic fine cleaning on the substrate by adopting an alkaline metal surface cleaning agent with the molar concentration of 2%, wherein the temperature of the ultrasonic fine cleaning is 50-75 ℃, and the time of the ultrasonic fine cleaning is 5-15 minutes.
The deionized water rinsing specifically comprises the following steps:
firstly, carrying out bubbling rinsing on the matrix by using deionized water at normal temperature, wherein the bubbling rinsing time is 3-5 minutes;
then, carrying out ultrasonic cleaning on the substrate by using deionized water at the temperature of 50-60 ℃, wherein the ultrasonic cleaning time is 1-2 minutes;
and finally, using deionized water with the temperature of 70-80 ℃ to throw the matrix up and down for 3-10 times, thereby finishing the rinsing of the deionized water.
In step S4, the method for coating a substrate after ion cleaning includes the following steps:
plating a priming layer: carrying out metal ion etching on the substrate subjected to ion cleaning treatment by adopting pure titanium target ions, then adjusting the air pressure in a vacuum chamber, and plating a priming layer on the surface of the substrate;
plating a transition layer: plating a transition layer on the surface of the substrate after the base coat is deposited, wherein the thickness of the transition layer is greater than that of the base coat;
and (3) functional layer plating: and plating a functional layer on the surface of the substrate after the deposition of the transition layer, wherein the thickness of the functional layer is less than that of the transition layer.
Plating a functional layer on the surface of the substrate after the deposition of the transition layer, wherein the functional layer is a high-temperature-resistant and wear-resistant layer, and the method comprises the following steps:
adopting a titanium-silicon alloy target, introducing a certain amount of nitrogen, and setting the air pressure in a vacuum chamber to be 2.5-4 Pa; applying pulse negative bias voltage to the substrate between-150V and-20V, wherein the duty ratio is 40-80%; adjusting target current to be 60 ~ 130A, letting in acetylene gas gradually, acetylene gas flow crescent, nitrogen gas flow reduces gradually, maintains the control of whole atmospheric pressure in the vacuum chamber at 2 ~ 3Pa scope, and the control of the flow ratio of acetylene gas and nitrogen gas is at 1: and 3, when the flow ratio of the acetylene gas to the nitrogen is stable, continuing to deposit for 60-180 minutes.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages: according to the high-temperature wear-resistant composite steel rolling roll collar provided by the embodiment of the application, the surface of the substrate is coated with the high-temperature wear-resistant coating, and the high-temperature wear-resistant coating is used for isolating high-temperature wires and bars from directly contacting the substrate; meanwhile, the surface of the high-temperature wear-resistant coating is smooth and fine, so that the friction coefficient between a product and the high-temperature wear-resistant composite steel rolling roll collar is reduced, the online time of the high-temperature wear-resistant composite steel rolling roll collar is prolonged, and the purpose of improving the yield is achieved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
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 for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic cross-sectional structural view of a wear-resistant composite roll collar provided in an embodiment of the application.
Fig. 2 is an enlarged schematic view of a position a in fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
For easy understanding, the high temperature wear-resistant composite rolling roll collar and the preparation method thereof provided by the embodiments of the present application are described in detail below, and as shown in fig. 1 to 2, the high temperature wear-resistant composite rolling roll collar is composed of a substrate 100 and a high temperature wear-resistant coating 200, the high temperature wear-resistant coating 200 is coated on the substrate 100, and the preparation method of the high temperature wear-resistant coating coated on the substrate includes the following steps:
s1, preprocessing: pretreating the substrate;
s2, vacuum heating treatment: putting the pretreated substrate into a vacuum chamber for heating treatment and pressure maintaining treatment, wherein the temperature during heating treatment is 350-550 ℃, and the pressure during pressure maintaining treatment is (3-8) × 10 -3 Pa；
S3, ion cleaning treatment: introducing argon/helium gas into the vacuum chamber, controlling the air pressure to be 0.33-2 Pa, simultaneously applying pulse negative bias to the substrate to be-800-50V, after the argon/helium gas ion bombards the substrate for a period of time, starting an ion source to enhance gas glow discharge so as to perform ion cleaning treatment on the surface of the heated and pressure-maintained substrate, wherein the time of the ion cleaning treatment is 40-120 minutes;
s4, coating treatment: carrying out film coating treatment on the substrate subjected to ion cleaning treatment to form a film coating workpiece;
s5, cooling: naturally cooling the coated workpiece obtained by coating treatment, and taking out the coated workpiece after the temperature of the coated workpiece is reduced to below 100 ℃;
s6, polishing treatment: and polishing the film-coated workpiece subjected to cooling treatment to obtain the high-temperature wear-resistant composite steel rolling roll collar.
In step S1, the preprocessing specifically includes the following steps: firstly, carrying out sand blasting treatment on the matrix; then, cleaning the matrix subjected to sand blasting; and finally, drying the cleaned matrix.
The cleaning treatment specifically comprises the following steps: and sequentially carrying out high-pressure water column spraying, ultrasonic cleaning and deionized water rinsing on the matrix subjected to the sand blasting treatment.
The sand blasting treatment specifically comprises the following steps: use SY-ZPT-4A duplex position dry-type sand blasting machine, and adopt 300 ~ 500 mesh white alundum, right all surfaces of base member all carry out sand blasting, just sand blasting's pressure is 0.3 ~ 0.6Mpa, sand blasting equipment's nozzle is apart from the distance of base member is 5 ~ 15cm, the base member follows sand blasting equipment's work platform rotates in step, just the nozzle reciprocates simultaneously, and the sandblast time is 5 ~ 10 minutes.
In step S2, the pressure maintaining time is 90 to 240 minutes.
The high-pressure water column spraying specifically comprises the following steps: and (2) carrying out high-pressure water column spraying on the matrix by adopting an alkaline metal surface active agent with the mass ratio of 3%, wherein the high-pressure spraying treatment time is 5-15 minutes.
The ultrasonic cleaning specifically comprises the following steps: firstly, carrying out ultrasonic rough washing on the substrate by adopting an alkaline metal surface cleaning agent with the molar concentration of 6%, wherein the temperature of the ultrasonic rough washing is 50-75 ℃, and the time of the ultrasonic rough washing is 5-15 minutes;
and then, carrying out ultrasonic fine cleaning on the substrate by adopting an alkaline metal surface cleaning agent with the molar concentration of 2%, wherein the temperature of the ultrasonic fine cleaning is 50-75 ℃, and the time of the ultrasonic fine cleaning is 5-15 minutes.
The deionized water rinsing specifically comprises the following steps:
firstly, carrying out bubbling rinsing on the matrix by using normal-temperature deionized water, wherein the bubbling rinsing time is 3-5 minutes;
then, carrying out ultrasonic cleaning on the substrate by using deionized water at the temperature of 50-60 ℃, wherein the ultrasonic cleaning time is 1-2 minutes;
and finally, using deionized water with the temperature of 70-80 ℃ to throw the substrate up and down for 3-10 times, thereby finishing the rinsing of the deionized water.
In step S4, the method for coating a substrate after ion cleaning includes the following steps:
plating the primer layer 201: carrying out metal ion etching on the substrate subjected to ion cleaning treatment by adopting pure titanium target ions, then adjusting the air pressure in a vacuum chamber, and plating a priming layer on the surface of the substrate; the method specifically comprises the following steps: carrying out metal ion etching by adopting pure titanium target ions, then adjusting argon gas pressure in a vacuum chamber, controlling the air pressure within the range of 0.5-2 Pa, adjusting pulse negative bias voltage to-300V-80V, and adjusting the duty ratio to 40-80%; simultaneously starting a chromium target arc source, wherein the arc current is 60-150A, and depositing a Cr film, namely a Cr layer in the priming layer, for 8-10 minutes; introducing nitrogen into the vacuum chamber, controlling the air pressure within the range of 0.5-1.5 Pa, adjusting the pulse negative bias voltage to-200V to-80V, adjusting the duty ratio to 40-80%, adjusting the chromium target arc current to 60-150A, and depositing a CrN film, namely a CrN layer in the priming layer for 10-15 minutes; then adjusting the nitrogen pressure in the vacuum chamber, controlling the nitrogen pressure within the range of 0.5-1.2 Pa, adjusting the pulse negative bias to-200V to-80V, and controlling the duty ratio to 40-60%; and simultaneously starting the chromium-aluminum alloy target arc source, wherein the arc current is 80-150A, and depositing the CrAlN film, namely the CrAlN layer in the priming layer for 30-120 minutes.
Plating the transition layer 202: plating a transition layer on the surface of the substrate after the bottom layer is deposited, wherein the thickness of the transition layer is greater than that of the bottom layer; the method specifically comprises the following steps: adjusting the nitrogen pressure in the vacuum chamber, controlling the nitrogen pressure within the range of 3-4 Pa, adjusting the pulse negative bias voltage to-200V to-20V, and keeping the duty ratio at 40-80%; and simultaneously starting the chromium-aluminum alloy target and the titanium-silicon alloy target arc source, wherein the titanium-aluminum arc current is 80-150A, the titanium-silicon arc current is 60-130A, and depositing the CrAlSiN film for 30-90 minutes.
Plating a functional layer on the surface of the substrate after the deposition of the transition layer, wherein the functional layer is a high-temperature-resistant and wear-resistant layer, and the method comprises the following steps:
adopting a titanium-silicon alloy target, introducing a certain amount of nitrogen, and setting the air pressure in a vacuum chamber to be 2.5-4 Pa; applying pulse negative bias to the substrate, wherein the duty ratio is 40-80%, and the negative bias is-150V to-20V; adjusting target current to be 60 ~ 130A, letting in acetylene gas gradually, acetylene gas flow crescent, nitrogen gas flow reduces gradually, maintains the control of whole atmospheric pressure in the vacuum chamber at 2 ~ 3Pa scope, and the control of the flow ratio of acetylene gas and nitrogen gas is at 1: and 3, when the flow ratio of the acetylene gas to the nitrogen is stable, continuing to deposit for 60-180 minutes.
And after the deposition is finished, closing an arc power supply, closing a bias power supply, closing a gas mass flowmeter and closing a target coil magnetic field power supply, maintaining the temperature at 520 ℃, continuing vacuumizing and maintaining the pressure for 120 minutes, closing the heating assembly, cooling the workpiece to be below 100 ℃ along with the furnace, opening the vacuum chamber, taking out the workpiece, and finishing the film coating process.
The titanium atom content of the used pure titanium target is 99.99 percent, the chromium atom content of the pure chromium target is 99.999 percent, and the aluminum atom percentage of the titanium-aluminum alloy target is 50-70 percent; in the target material of the titanium-silicon alloy target, the atomic percent of silicon is 5-20%.
According to the high-temperature wear-resistant composite steel rolling roll collar provided by the embodiment of the application, the ion beam assisted vacuum ion coating technology is utilized to coat the high-temperature wear-resistant coating on the surface of the roll collar, the coating isolates high-temperature wires and bars from directly contacting with a roll collar body, and meanwhile, the friction coefficient between a finished product and the roll collar is reduced due to the smooth and fine coating surface, so that the online time of the roll collar is prolonged, the yield is improved, and the surface roughness of the finished product is also reduced.
The high-temperature wear-resistant composite steel rolling roll collar provided by the embodiment of the invention has the following obvious advantages that a high-temperature wear-resistant coating is coated on the surface of the roll collar by using an ion beam assisted vacuum ion coating technology:
the thickness of the film is moderate: 8-15 μm;
the coating hardness is high: the hardness of the film layer can reach 3800-4300 HV;
the friction coefficient is low: compared with the hard alloy roll collar, the friction coefficient is reduced by 50 percent;
heat fatigue resistance: can work continuously at the high temperature of 1000 ℃;
firm combination of the coating and the matrix: the film layer is evenly worn and does not generate local falling of the film.
According to the high-temperature wear-resistant composite steel rolling roll collar provided by the embodiment of the invention, the high-temperature wear-resistant coating on the roll collar can isolate direct contact between a high-temperature wire and a bar and a roll collar body, and meanwhile, the surface of the coating is smooth and fine, so that the friction coefficient between a finished product and the roll collar is reduced, the online time of the roll collar is prolonged, the yield is improved, and the surface roughness of the finished product is also reduced. By using the roller ring at a certain steel rolling factory, the service life of the high-speed wire steel rolling roller ring can be prolonged by 2-3 times, and the service life of the rod roller ring can be prolonged by 3-5 times.
It is noted that, in this document, relational terms such as "first" and "second," and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The preparation method of the high-temperature wear-resistant composite steel rolling roll collar is characterized in that the high-temperature wear-resistant composite steel rolling roll collar is composed of a base body and a high-temperature wear-resistant coating, the high-temperature wear-resistant coating is coated on the base body, and the preparation method of the high-temperature wear-resistant coating coated on the base body comprises the following steps:
s1, pretreatment: pretreating the substrate;
s2, vacuum heating treatment: putting the pretreated substrate into a vacuum chamber for heating treatment and pressure maintaining treatment, wherein the temperature during heating treatment is 350-550 ℃, and the pressure during pressure maintaining treatment is (3-8) × 10 -3 Pa；
S3, ion cleaning treatment: introducing argon/helium gas into the vacuum chamber, controlling the air pressure to be 0.33-2 Pa, simultaneously applying pulse negative bias to the substrate to be-800-50V, after the argon/helium gas ion bombards the substrate for a period of time, starting an ion source to enhance gas glow discharge so as to perform ion cleaning treatment on the surface of the heated and pressure-maintained substrate, wherein the time of the ion cleaning treatment is 40-120 minutes;
s4, coating treatment: carrying out film coating treatment on the substrate subjected to the ion cleaning treatment to form a film coating workpiece;
s5, cooling: naturally cooling the coated workpiece obtained by coating treatment, and taking out the coated workpiece after the temperature of the coated workpiece is reduced to be below 100 ℃;
s6, polishing treatment: and polishing the film-coated workpiece subjected to cooling treatment to obtain the high-temperature wear-resistant composite steel rolling roll collar.
2. The method for preparing the high-temperature wear-resistant composite steel rolling roll collar as claimed in claim 1, wherein in the step S1, the pretreatment specifically comprises the following steps: firstly, carrying out sand blasting treatment on the matrix; then, cleaning the matrix subjected to sand blasting; and finally, drying the cleaned matrix.
3. The method for preparing the high-temperature wear-resistant composite steel rolling roll collar as claimed in claim 2, wherein the cleaning treatment specifically comprises the following steps: and sequentially carrying out high-pressure water column spraying, ultrasonic cleaning and deionized water rinsing on the matrix subjected to the sand blasting treatment.
4. The method for preparing the high-temperature wear-resistant composite steel rolling roll collar as claimed in claim 2, wherein the sand blasting treatment specifically comprises the following steps: use SY-ZPT-4A duplex position dry-type sand blasting machine, and adopt 300 ~ 500 mesh white alundum, right all surfaces of base member all carry out sand blasting, just sand blasting's pressure is 0.3 ~ 0.6Mpa, SY-ZPT-4A duplex position dry-type sand blasting machine's nozzle is apart from the distance of base member is 5 ~ 15cm, the base member follows SY-ZPT-4A duplex position dry-type sand blasting machine's work platform rotates in step, just the nozzle reciprocates simultaneously, and the sand blasting time is 5 ~ 10 minutes.
5. The method for preparing the high-temperature wear-resistant composite steel rolling roll collar according to claim 1, wherein in the step S2, the pressure maintaining time is 90-240 minutes.
6. The preparation method of the high-temperature wear-resistant composite steel rolling roll collar as claimed in claim 3, wherein the high-pressure water column spraying is specifically as follows: and (2) carrying out high-pressure water column spraying on the matrix by adopting an alkaline metal surface active agent with the mass ratio of 3%, wherein the high-pressure spraying treatment time is 5-15 minutes.
7. The method for preparing the high-temperature wear-resistant composite steel rolling roll collar according to claim 3, wherein the ultrasonic cleaning specifically comprises the following steps:
firstly, carrying out ultrasonic rough washing on the substrate by adopting an alkaline metal surface cleaning agent with the molar concentration of 6%, wherein the temperature of the ultrasonic rough washing is 50-75 ℃, and the time of the ultrasonic rough washing is 5-15 minutes;
and then, carrying out ultrasonic fine cleaning on the substrate by adopting an alkaline metal surface cleaning agent with the molar concentration of 2%, wherein the temperature of the ultrasonic fine cleaning is 50-75 ℃, and the time of the ultrasonic fine cleaning is 5-15 minutes.
8. The method for preparing the high-temperature wear-resistant composite steel rolling roll collar according to claim 3, wherein the deionized water rinsing specifically comprises the following steps:
firstly, carrying out bubbling rinsing on the matrix by using deionized water at normal temperature, wherein the bubbling rinsing time is 3-5 minutes;
then, carrying out ultrasonic cleaning on the substrate by using deionized water at the temperature of 50-60 ℃, wherein the ultrasonic cleaning time is 1-2 minutes;
and finally, using deionized water with the temperature of 70-80 ℃ to throw the matrix up and down for 3-10 times, thereby finishing the rinsing of the deionized water.
9. The method for preparing the high-temperature wear-resistant composite steel rolling roll collar according to claim 1, wherein the step S4 of coating the substrate subjected to the ion cleaning treatment comprises the following steps:
plating a priming layer: carrying out metal ion etching on the substrate subjected to ion cleaning treatment by adopting pure titanium target ions, then adjusting the air pressure in a vacuum chamber, and plating a priming layer on the surface of the substrate;
plating a transition layer: plating a transition layer on the surface of the substrate after the bottom layer is deposited, wherein the thickness of the transition layer is greater than that of the bottom layer;
and (3) functional layer plating: and plating a functional layer on the surface of the substrate after the deposition of the transition layer, wherein the thickness of the functional layer is less than that of the transition layer.
10. The method for preparing the high-temperature wear-resistant composite steel rolling roll collar as claimed in claim 9, wherein a functional layer is plated on the surface of the substrate after the transition layer is deposited, the functional layer is a high-temperature wear-resistant layer, and the method comprises the following steps:
adopting a titanium-silicon alloy target, introducing a certain amount of nitrogen, and setting the air pressure in a vacuum chamber to be 2.5-4 Pa; applying pulse negative bias voltage to the substrate between-150V and-20V, wherein the duty ratio is 40-80%; adjusting target current to be 60 ~ 130A, letting in acetylene gas gradually, acetylene gas flow crescent, nitrogen gas flow reduces gradually, maintains the control of whole atmospheric pressure in the vacuum chamber at 2 ~ 3Pa scope, and the control of the flow ratio of acetylene gas and nitrogen gas is at 1: and 3, when the flow ratio of the acetylene gas to the nitrogen is stable, continuously depositing for 60-180 minutes.
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