CN116657019B - NiTiAlVCMo powder-based laser additive alloy, composite coating and preparation method of composite coating - Google Patents

NiTiAlVCMo powder-based laser additive alloy, composite coating and preparation method of composite coating Download PDF

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CN116657019B
CN116657019B CN202310920994.8A CN202310920994A CN116657019B CN 116657019 B CN116657019 B CN 116657019B CN 202310920994 A CN202310920994 A CN 202310920994A CN 116657019 B CN116657019 B CN 116657019B
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laser
mixed material
composite coating
powder
alloy
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CN116657019A (en
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姜广君
李欣宇
李云峰
穆东明
梅秀庄
赵亓
程天才
李琦
王赜
巩勇智
呼伦呼
孙洪华
马少瑛
陈惠东
康羲月
王作城
肖佳龙
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Inner Mongolia University of Technology
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C30/00—Alloys containing less than 50% by weight of each constituent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/20—Direct sintering or melting
    • B22F10/25—Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y10/00—Processes of additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y70/00—Materials specially adapted for additive manufacturing
    • B33Y70/10—Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y80/00—Products made by additive manufacturing
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/047—Making non-ferrous alloys by powder metallurgy comprising intermetallic compounds
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/05—Mixtures of metal powder with non-metallic powder
    • C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
    • C22C1/053—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor with in situ formation of hard compounds
    • C22C1/055—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor with in situ formation of hard compounds using carbon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
    • C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
    • C22C32/0052—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only carbides
    • 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
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
    • C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
    • C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Abstract

The invention discloses a laser additive alloy based on NiTiAlVCMo powder, a composite coating and a preparation method of the composite coating, belongs to the technical field of laser additive, is innovatively designed to be suitable for high corrosion resistance and high wear resistance medium carbon alloy steel components for laser additive manufacturing and remanufacturing, and effectively solves the problems that in the traditional alloy component system powder laser forming process, powder printability is poor, formability is poor (deformation and cracking), strength and toughness are poor in matching performance, and mechanical property is poor, and wear resistance and corrosion resistance do not meet requirements. And ball-milling and mixing Ni, ti, al, V, C and Mo powder, vacuum drying, blowing the obtained mixed material to the surface of the base material through argon, and simultaneously cladding the mixed material under the action of laser to form a composite coating on the surface of the base material. The alloy disclosed by the invention has the advantages of simple components, reasonable design, reduced processing cost and improved processing efficiency, so that a large number of rapid processing in factories can be realized.

Description

NiTiAlVCMo powder-based laser additive alloy, composite coating and preparation method of composite coating
Technical Field
The invention relates to the technical field of laser material increase, in particular to a laser material increase alloy based on NiTiAlVCMo powder, a composite coating and a preparation method of the composite coating.
Background
The manufacturing of the key metal part by utilizing the laser additive manufacturing technology is a process of firstly melting and then solidifying metal powder, and has the characteristics of small heat affected zone, small deformation, good metallurgical bonding with a matrix, easiness in realizing automation and the like. Alloy composition is one of the key factors in determining the organization and performance of laser additive manufacturing and remanufacturing key metal features. For low-carbon low-alloy steel systems, the hardness is generally low (300-400HV), the performance requirements of high hardness and high wear resistance parts cannot be met. For conventional high C (greater than 10%) or high Cr (greater than 35%) wear resistant alloy steel powder systems, excessive carbide formation (e.g., tiC, cr) during laser additive manufacturing may occur due to the high C or Cr powder 23 C 6 Etc.), the carbides form a large number of stress concentration points after additive forming, which leads to remarkable increase of phase change stress and thermal stress, and finally leads to crack and deformation of the high-hardness wear-resistant part. High stress concentrations also reduce the toughness of the post-additive alloy, resulting in a significant reduction in the impact resistance of the part. In addition, a high C content results in precipitation of a large amount of corrosion-resistant elements (e.g., cr elements) to form carbides (e.g., cr) 23 C 6 Etc.), the Cr element in the alloy after the material addition is reduced, and then the phenomenon of Cr deficiency is generated, and the remarkable reduction of the Cr element can have adverse effect on the corrosion resistance of the alloy steel.
Based on the problems, such as poor powder printability, easy deformation and cracking, poor toughness matching property, poor mechanical property and the like, existing in the traditional high-C-content or high-Cr-content wear-resistant alloy steel powder laser additive manufacturing, how to design alloy components suitable for the laser additive manufacturing technology is the problem to be solved by the invention.
Disclosure of Invention
Aiming at the problems, the invention provides a laser additive alloy based on NiTiAlVCMo powder, a composite coating and a preparation method of the composite coating, which are based on the principle of physical and chemical reaction among metal elements, and combine the characteristics of metal powder which is melted first and then solidified by a laser additive manufacturing technology, the novel design is suitable for high corrosion resistance and high wear resistance medium carbon alloy steel components for laser additive manufacturing and remanufacturing, and the technical problems of poor powder printability, poor formability (deformation and cracking), poor toughness matching property, poor mechanical property, unsatisfactory wear resistance and corrosion resistance and the like in the powder laser forming process of the traditional alloy component system are effectively solved.
The first object of the invention is to provide a laser additive alloy based on NiTiAlVCMo powder, which is characterized in that the composite coating consists of the following raw materials in percentage by mass: 14% -28% of Ni, 15% -29% of Ti, 13% -25% of Al, 10% -21% of V, 2% -9%C and 6% -19% of Mo.
A second object of the present invention is to provide a laser additive composite coating, which is characterized in that the laser additive alloy is manufactured by laser additive.
The third object of the invention is to provide a preparation method of the laser additive composite coating, which is characterized by comprising the following steps:
s1, respectively weighing the following raw materials in percentage by mass: 14% -28% of Ni, 15% -29% of Ti, 13% -25% of Al, 10% -21% of V, 2% -9%C and 6% -19% of Mo; adding water into the weighed raw materials, ball-milling and mixing, and vacuum drying to obtain a mixed material with the water content of 0.4% -1.3%;
s2, conveying the mixed material of the S1 to laser additive manufacturing equipment, blowing the mixed material to the surface of a substrate through a coaxial powder feeding head by adopting argon airflow, and cladding the mixed material by adopting laser to obtain the composite coating.
Preferably, in S2, the laser parameters are: the laser power is 1500-190W, the laser scanning speed is 250-350 mm/min, and the spot diameter is 1-4 mm.
Preferably, in S2, the blowing speed of the mixed material is 3 g/min-10 g/min.
Preferably, in S2, the argon flow is 6L/min-25L/min.
Preferably, in S2, after the composite coating is cooled, repeating the step S2, and forming 2-100 layers of composite coatings on the surface of the substrate.
Preferably, in S1, the ball milling parameters are: the rotating speed is 400r/min, and the ball milling time is 20min.
Preferably, in S1, the vacuum drying procedure is as follows: the vacuum degree is 1215Pa, the drying temperature is 85-120 ℃, and the drying time is 2h.
Compared with the prior art, the invention has the beneficial effects that:
in order to solve the problems of poor powder printability, easy deformation and cracking, poor toughness and matching property, poor mechanical property and the like existing in the traditional high-C-content or high-Cr-content wear-resistant alloy steel powder laser additive manufacturing process in the prior art, the invention provides an alloy suitable for a laser additive manufacturing technology, which is different from the traditional alloy in that the carbon content is higher than 10%, wherein the C content is 2% -9%, and the components interact with each other, so that the problems of poor powder printability, poor formability (deformation and cracking), poor toughness and matching property, unsatisfactory mechanical property, wear resistance and corrosion resistance are improved when the alloy is manufactured by laser additive, and the invention is characterized in that:
ti can be dissolved in Ni element to form [ Ni, ti]Binary solid solution phase, mo can be formed by solid solution of Ni element]The binary solid solution phase can form [ Co, ti, mo ] by simultaneously dissolving Ti and Mo in Co element ]The three solid solution phases have good toughness and corrosion resistance, and have remarkable effects of improving the impact resistance, cracking resistance and corrosion resistance of the composite coating. The Ni, ti and Mo elements can respectively form NiAl, tiAl, moAl intermetallic compounds with high hardness with Al, so that the wear resistance of the composite coating can be effectively improved. Ni, ti, mo, V elements can also form VC, tiC, moC, ni with C respectively 3 The hard carbide such as C can effectively improve the wear resistance of the composite coating.
The invention also prepares the laser additive composite coating by using the alloy, and carries out related performance detection on the composite coating, and the result shows that the crack quantity of the composite coating is 0, and the impact toughness can reach as high as 20.5J/cm 2 The tensile strength reaches 651MPa, the abrasion loss can be reduced to 0.4g, and the corrosion current is reduced to 2.6 mu A/cm 2 The method comprises the steps of carrying out a first treatment on the surface of the The alloy of the invention is proved to be very suitable for laser additive manufacturing.
The alloy disclosed by the invention is simple in components and reasonable in design, and after the components are coordinated, the alloy is suitable for a laser additive manufacturing technology, so that a new idea is provided for further developing the laser additive manufacturing alloy.
Drawings
FIG. 1 is a schematic diagram of a laser controlled cracking process apparatus employed in the present invention;
reference numerals illustrate:
1. Powder feeder 2, argon cylinder 3, control system 4, laser device 5, coaxial powder feeding head 6, multilayer composite coating and 7, substrate.
Detailed Description
In order that those skilled in the art will better understand the technical solution of the present invention, the present invention will be further described with reference to specific examples, but the examples are not intended to limit the present invention. The following test methods and detection methods, if not specified, are conventional methods; the reagents and starting materials, unless otherwise specified, are commercially available.
Example 1
A laser additive alloy based on nitialcmo powder, the alloy consisting of the following raw materials in mass percent: 14% Ni, 24% Ti, 13% Al, 21% V, 9%C, 19% Mo.
The preparation method of the composite coating manufactured by the laser additive alloy through laser additive comprises the following steps:
s1: weighing alloy powder with the mass percentage of 14% of Ni, 24% of Ti, 13% of Al, 21% of V, 9%C and 19% of Mo, adding water, performing ball milling and mixing, and performing vacuum drying to obtain a mixed material with the water content of 0.4%;
the parameters of ball milling and mixing are as follows: the rotating speed is 400r/min, and the ball milling time is 20min.
The specific procedure of vacuum drying is as follows: the vacuum degree was 1215Pa, the drying temperature was 85℃and the drying time was 2 hours.
S2: the mixed material in the step S1 is conveyed to processing equipment with controllable cracking of laser, as shown in FIG. 1, the mixed material is conveyed to a powder feeder 1, a base material 7 is fixed on a workbench, an argon gas bottle 2 is opened to convey argon gas flow to a coaxial powder feeding head 5 at a flow rate of 6L/min and blow the argon gas flow to the surface of the base material 7, meanwhile, the argon gas flow is conveyed to the powder feeder 1, the powder feeder 1 is opened to convey the mixed material to the coaxial powder feeding head 5, the mixed material is blown to the surface of the base material 7 through the coaxial powder feeder 5 at a speed of 3g/min, a laser device 4 is opened, the laser power is adjusted to 1500W, the laser scanning speed is 250mm/min, the spot diameter is 1mm, a laser beam irradiates the mixed material through the coaxial powder feeding head 5, the workbench is controlled to move left and right along an X axis, the coaxial powder feeding head 5 moves back and forth along a Y axis or up and down along a Z axis through a control system 3, and the mixed material on the surface of the base material is subjected to cladding treatment by the laser beam, and a composite coating is obtained. Repeating the steps to form 2 layers of composite coating on the surface of the substrate.
Example 2
A laser additive alloy based on nitialcmo powder, the alloy consisting of the following raw materials in mass percent: 28% Ni, 29% Ti, 25% Al, 10% V, 2% C, 6% Mo.
The preparation method of the composite coating manufactured by the laser additive alloy through laser additive comprises the following steps:
s1: weighing alloy powder with the mass percentage of 28% of Ni, 29% of Ti, 25% of Al, 10% of V, 2% of C and 6% of Mo, adding water, ball-milling and mixing, and vacuum drying to obtain a mixed material with the water content of 0.5%;
the parameters of ball milling and mixing are as follows: the rotating speed is 400r/min, and the ball milling time is 20min.
The specific procedure of vacuum drying is as follows: the vacuum degree was 1215Pa, the drying temperature was 90℃and the drying time was 2 hours.
S2: the mixed material in the step S1 is conveyed to processing equipment with controllable cracking of laser, as shown in fig. 1, the mixed material is conveyed to a powder feeder 1, a base material 7 is fixed on a workbench, an argon gas bottle 2 is opened to convey argon gas flow to a coaxial powder feeding head 5 at a flow of 13L/min and blow the argon gas flow to the surface of the base material 7, meanwhile, argon gas flow is conveyed to the powder feeder 1, the powder feeder 1 is opened to convey the mixed material to the coaxial powder feeding head 5, the mixed material is blown to the surface of the base material 7 through the coaxial powder feeder 5 at a speed of 6g/min, a laser device 4 is opened, the laser power is adjusted to 1700W, the laser scanning speed is 300mm/min, the spot diameter is 2.5mm, a laser beam irradiates the mixed material through the coaxial powder feeding head 5, the workbench is controlled to move left and right along an X axis, the coaxial powder feeding head 5 moves up and down along a Y axis or along a Z axis, the mixed material on the surface of the base material is subjected to cladding treatment by the laser beam, and a composite coating is obtained, and the steps are repeated, and a composite coating layer of 5 is formed on the surface of the base material.
Example 3
A laser additive alloy based on nitialcmo powder, the alloy consisting of the following raw materials in mass percent: 24% Ni, 15% Ti, 20% Al, 18% V, 6%C, 17% Mo.
The preparation method of the composite coating manufactured by the laser additive alloy through laser additive comprises the following steps:
s1: weighing alloy powder with the mass percentage of 24% of Ni, 15% of Ti, 20% of Al, 18% of V, 6%C and 17% of Mo, adding water, performing ball milling and mixing, and performing vacuum drying to obtain a mixed material with the water content of 0.6%;
the parameters of ball milling and mixing are as follows: the rotating speed is 400r/min, and the ball milling time is 20min.
The specific procedure of vacuum drying is as follows: the vacuum degree was 1215Pa, the drying temperature was 95℃and the drying time was 2 hours.
S2: the mixed material in the step S1 is conveyed to processing equipment with controllable cracking of laser, as shown in fig. 1, the mixed material is conveyed to a powder feeder 1, a base material 7 is fixed on a workbench, an argon cylinder 2 is opened to convey argon gas flow to a coaxial powder feeder 5 at a flow rate of 25L/min and blow the argon gas flow to the surface of the base material 7, meanwhile, the argon gas flow is conveyed to the powder feeder 1, the powder feeder 1 is opened to convey the mixed material to the coaxial powder feeder 5, the mixed material is blown to the surface of the base material 7 at a speed of 10g/min through the coaxial powder feeder 5, a laser device 4 is opened, the laser power is adjusted to 1900W, the laser scanning speed is 350mm/min, the spot diameter is 4mm, a laser beam irradiates the mixed material through the coaxial powder feeder 5, the workbench is controlled to move left and right along an X axis, the coaxial powder feeder 5 moves back and forth along a Y axis or up and down along a Z axis through a control system 3, the mixed material on the surface of the base material is subjected to cladding treatment by the laser beam, and a composite coating is obtained, and the steps are repeated, and 10 layers of composite coating are formed on the surface of the base material.
Example 4
A laser additive alloy based on nitialcmo powder, the alloy consisting of the following raw materials in mass percent: 20% Ni, 17% Ti, 18% Al, 19% V, 8%C, 18% Mo.
The preparation method of the composite coating manufactured by the laser additive alloy through laser additive comprises the following steps:
s1: weighing alloy powder with the mass percentage of 20% of Ni, 17% of Ti, 18% of Al, 19% of V, 8%C and 18% of Mo, adding water, performing ball milling and mixing, and performing vacuum drying to obtain a mixed material with the water content of 0.8%;
the parameters of ball milling and mixing are as follows: the rotating speed is 400r/min, and the ball milling time is 20min.
The specific procedure of vacuum drying is as follows: the vacuum degree was 1215Pa, the drying temperature was 100deg.C, and the drying time was 2 hours.
S2: the mixed material in the step S1 is conveyed to processing equipment with controllable cracking of laser, as shown in fig. 1, the mixed material is conveyed to a powder feeder 1, a base material 7 is fixed on a workbench, an argon cylinder 2 is opened to convey argon gas flow to a coaxial powder feeding head 5 at a flow of 15L/min and blow the argon gas flow to the surface of the base material 7, meanwhile, the argon gas flow is conveyed to the powder feeder 1, the powder feeder 1 is opened to convey the mixed material to the coaxial powder feeding head 5, the mixed material is blown to the surface of the base material 7 at a speed of 5g/min through the coaxial powder feeder 5, a laser device 4 is opened, the laser power is adjusted to 1600W, the laser scanning speed is 280mm/min, the spot diameter is 2mm, a laser beam irradiates the mixed material through the coaxial powder feeding head 5, the workbench is controlled to move left and right along an X axis through a control system 3, the coaxial powder feeding head 5 moves back and forth along a Y axis or up and down along a Z axis, the mixed material on the surface of the base material is subjected to cladding treatment by the laser beam, and a composite coating is obtained, and the steps are repeated, and a 20-layer composite coating is formed on the surface of the base material.
Example 5
A laser additive alloy based on nitialcmo powder, the alloy consisting of the following raw materials in mass percent: 17% Ni, 26% Ti, 14% Al, 18% V, 7%C, 18% Mo.
The preparation method of the composite coating manufactured by the laser additive alloy through laser additive comprises the following steps:
s1: weighing alloy powder with the mass percentage of 17% Ni, 26% Ti, 14% Al, 18% V, 7%C and 18% Mo, adding water, ball-milling and mixing, and vacuum drying to obtain a mixed material with the water content of 1.0%;
the parameters of ball milling and mixing are as follows: the rotating speed is 400r/min, and the ball milling time is 20min.
The specific procedure of vacuum drying is as follows: the vacuum degree was 1215Pa, the drying temperature was 100deg.C, and the drying time was 2 hours.
S2: the mixed material in the step S1 is conveyed to processing equipment with controllable cracking of laser, as shown in fig. 1, the mixed material is conveyed to a powder feeder 1, a base material 7 is fixed on a workbench, an argon cylinder 2 is opened to convey argon gas flow to a coaxial powder feeder 5 at a flow of 20L/min and blow the argon gas flow to the surface of the base material 7, meanwhile, the argon gas flow is conveyed to the powder feeder 1, the powder feeder 1 is opened to convey the mixed material to the coaxial powder feeder 5, the mixed material is blown to the surface of the base material 7 at a speed of 8g/min through the coaxial powder feeder 5, a laser device 4 is opened, the laser power is adjusted to 1800W, the laser scanning speed is 320mm/min, the spot diameter is 3mm, a laser beam irradiates the mixed material through the coaxial powder feeder 5, the workbench is controlled to move left and right along an X axis, the coaxial powder feeder 5 moves back and forth along a Y axis or up and down along a Z axis through a control system 3, the mixed material on the surface of the base material is subjected to cladding treatment by the laser beam, and a composite coating is obtained, and a 30-layer composite coating is formed on the surface of the base material.
Example 6
A laser additive alloy based on nitialcmo powder, the alloy consisting of the following raw materials in mass percent: 26% Ni, 28% Ti, 13% Al, 12% V, 5%C, 16% Mo.
The preparation method of the composite coating manufactured by the laser additive alloy through laser additive comprises the following steps:
s1: weighing alloy powder with the mass percentage of 26% of Ni, 28% of Ti, 13% of Al, 12% of V, 5%C and 16% of Mo, adding water, performing ball milling and mixing, and performing vacuum drying to obtain a mixed material with the water content of 1.2%;
the parameters of ball milling and mixing are as follows: the rotating speed is 400r/min, and the ball milling time is 20min.
The specific procedure of vacuum drying is as follows: the vacuum degree was 1215Pa, the drying temperature was 110℃and the drying time was 2 hours.
S2: the mixed material in the step S1 is conveyed to processing equipment with controllable cracking of laser, as shown in fig. 1, the mixed material is conveyed to a powder feeder 1, a base material 7 is fixed on a workbench, an argon cylinder 2 is opened to convey argon gas flow to a coaxial powder feeder 5 at a flow of 9L/min and blow the argon gas flow to the surface of the base material 7, meanwhile, the argon gas flow is conveyed to the powder feeder 1, the powder feeder 1 is opened to convey the mixed material to the coaxial powder feeder 5, the mixed material is blown to the surface of the base material 7 through the coaxial powder feeder 5 at a speed of 4g/min, a laser device 4 is opened, the laser power is adjusted to 1650W, the laser scanning speed is 260mm/min, the spot diameter is 4mm, a laser beam irradiates the mixed material through the coaxial powder feeder 5, the workbench is controlled to move left and right along an X axis, the coaxial powder feeder 5 moves back and forth along a Y axis or up and down along a Z axis through a control system 3, the mixed material on the surface of the base material is subjected to cladding treatment by the laser beam, and a composite coating is obtained, and the step is repeated, and a composite coating layer 70 is formed on the surface of the base material.
Example 7
A laser additive alloy based on nitialcmo powder, the alloy consisting of the following raw materials in mass percent: 22% Ni, 22% Ti, 16% Al, 18% V, 5%C, 17% Mo.
The preparation method of the composite coating manufactured by the laser additive alloy through laser additive comprises the following steps:
s1: weighing alloy powder with the mass percentage of 22% of Ni, 22% of Ti, 16% of Al, 18% of V, 5%C and 17% of Mo, adding water, performing ball milling and mixing, and performing vacuum drying to obtain a mixed material with the water content of 1.3%;
the parameters of ball milling and mixing are as follows: the rotating speed is 400r/min, and the ball milling time is 20min.
The specific procedure of vacuum drying is as follows: the vacuum degree was 1215Pa, the drying temperature was 120℃and the drying time was 2 hours.
S2: the mixed material in the step S1 is conveyed to processing equipment with controllable cracking of laser, as shown in fig. 1, the mixed material is conveyed to a powder feeder 1, a base material 7 is fixed on a workbench, an argon cylinder 2 is opened to convey argon gas flow to a coaxial powder feeder 5 at a flow rate of 18L/min and blow the argon gas flow to the surface of the base material 7, meanwhile, the argon gas flow is conveyed to the powder feeder 1, the powder feeder 1 is opened to convey the mixed material to the coaxial powder feeder 5, the mixed material is blown to the surface of the base material 7 at a speed of 9g/min through the coaxial powder feeder 5, a laser device 4 is opened, the laser power is regulated to 1750W, the laser scanning speed is 330mm/min, the spot diameter is 1mm, a laser beam irradiates the mixed material through the coaxial powder feeder 5, the workbench is controlled to move left and right along an X axis, the coaxial powder feeder 5 moves back and forth along a Y axis or up and down along a Z axis through a control system 3, the mixed material on the surface of the base material is subjected to cladding treatment by the laser beam, and a composite coating is obtained, and the steps are repeated, and a composite coating of 100 layers is formed on the surface of the base material.
To further illustrate the effect of the present invention, the present invention provides a comparative example as follows:
comparative example 1
Compared with example 1, the difference is that the addition of V element is removed, and the alloy consists of the following raw materials in percentage by mass: 24% Ni, 27% Ti, 20% Al, 9%C, 20% Mo.
A laser additive alloy based on NiTiAlMo powder, which consists of the following raw materials in percentage by mass: 24% Ni, 27% Ti, 20% Al, 9%C, 20% Mo.
The preparation method of the composite coating manufactured by the laser additive alloy through laser additive comprises the following steps:
s1: weighing alloy powder with the mass percentage of 24% of Ni, 27% of Ti, 20% of Al, 9%C and 20% of Mo, adding water, performing ball milling and mixing, and performing vacuum drying to obtain a mixed material with the water content of 0.4%;
the parameters of ball milling and mixing are as follows: the rotating speed is 400r/min, and the ball milling time is 20min.
The specific procedure of vacuum drying is as follows: the vacuum degree was 1215Pa, the drying temperature was 85℃and the drying time was 2 hours.
S2: the mixed material in the step S1 is conveyed to processing equipment with controllable cracking of laser, as shown in FIG. 1, the mixed material is conveyed to a powder feeder 1, a base material 7 is fixed on a workbench, an argon gas bottle 2 is opened to convey argon gas flow to a coaxial powder feeding head 5 at a flow rate of 6L/min and blow the argon gas flow to the surface of the base material 7, meanwhile, the argon gas flow is conveyed to the powder feeder 1, the powder feeder 1 is opened to convey the mixed material to the coaxial powder feeding head 5, the mixed material is blown to the surface of the base material 7 through the coaxial powder feeder 5 at a speed of 3g/min, a laser device 4 is opened, the laser power is adjusted to 1500W, the laser scanning speed is 250mm/min, the spot diameter is 1mm, a laser beam irradiates the mixed material through the coaxial powder feeding head 5, the workbench is controlled to move left and right along an X axis, the coaxial powder feeding head 5 moves back and forth along a Y axis or up and down along a Z axis through a control system 3, and the mixed material on the surface of the base material is subjected to cladding treatment by the laser beam, and a composite coating is obtained. Repeating the steps to form 2 layers of composite coating on the surface of the substrate.
Comparative example 2
Compared with example 1, the difference is that the alloy consists of the following raw materials in percentage by mass: 17% Ni, 26% Ti, 16% Al, 8%V, 12% C, 21% Mo.
A laser additive alloy based on nitialcmo powder, the alloy consisting of the following raw materials in mass percent: 17% Ni, 26% Ti, 16% Al, 8%V, 12% C, 21% Mo.
The preparation method of the composite coating manufactured by the laser additive alloy through laser additive comprises the following steps:
s1: weighing alloy powder with the mass percentage of 17% Ni, 26% Ti, 16% Al, 8%V, 12% C and 21% Mo, adding water, ball-milling and mixing, and vacuum drying to obtain a mixed material with the water content of 0.4%;
the parameters of ball milling and mixing are as follows: the rotating speed is 400r/min, and the ball milling time is 20min.
The specific procedure of vacuum drying is as follows: the vacuum degree was 1215Pa, the drying temperature was 85℃and the drying time was 2 hours.
S2: the mixed material in the step S1 is conveyed to processing equipment with controllable cracking of laser, as shown in FIG. 1, the mixed material is conveyed to a powder feeder 1, a base material 7 is fixed on a workbench, an argon gas bottle 2 is opened to convey argon gas flow to a coaxial powder feeding head 5 at a flow rate of 6L/min and blow the argon gas flow to the surface of the base material 7, meanwhile, the argon gas flow is conveyed to the powder feeder 1, the powder feeder 1 is opened to convey the mixed material to the coaxial powder feeding head 5, the mixed material is blown to the surface of the base material 7 through the coaxial powder feeder 5 at a speed of 3g/min, a laser device 4 is opened, the laser power is adjusted to 1500W, the laser scanning speed is 250mm/min, the spot diameter is 1mm, a laser beam irradiates the mixed material through the coaxial powder feeding head 5, the workbench is controlled to move left and right along an X axis, the coaxial powder feeding head 5 moves back and forth along a Y axis or up and down along a Z axis through a control system 3, and the mixed material on the surface of the base material is subjected to cladding treatment by the laser beam, and a composite coating is obtained. Repeating the steps to form 2 layers of composite coating on the surface of the substrate.
Comparative example 3
Compared with example 1, the difference is that the alloy consists of the following raw materials in percentage by mass: 14% Ni, 22% Ti, 13% Al, 23% V, 9%C, 19% Mo.
A laser additive alloy based on nitialcmo powder, the alloy consisting of the following raw materials in mass percent: 14% Ni, 22% Ti, 13% Al, 23% V, 9%C, 19% Mo.
The preparation method of the composite coating manufactured by the laser additive alloy through laser additive comprises the following steps:
s1: weighing alloy powder with the mass percentage of 14% of Ni, 22% of Ti, 13% of Al, 23% of V, 9%C and 19% of Mo, adding water, performing ball milling and mixing, and performing vacuum drying to obtain a mixed material with the water content of 0.4%;
the parameters of ball milling and mixing are as follows: the rotating speed is 400r/min, and the ball milling time is 20min.
The specific procedure of vacuum drying is as follows: the vacuum degree was 1215Pa, the drying temperature was 85℃and the drying time was 2 hours.
S2: the mixed material in the step S1 is conveyed to processing equipment with controllable cracking of laser, as shown in FIG. 1, the mixed material is conveyed to a powder feeder 1, a base material 7 is fixed on a workbench, an argon gas bottle 2 is opened to convey argon gas flow to a coaxial powder feeding head 5 at a flow rate of 6L/min and blow the argon gas flow to the surface of the base material 7, meanwhile, the argon gas flow is conveyed to the powder feeder 1, the powder feeder 1 is opened to convey the mixed material to the coaxial powder feeding head 5, the mixed material is blown to the surface of the base material 7 through the coaxial powder feeder 5 at a speed of 3g/min, a laser device 4 is opened, the laser power is adjusted to 1500W, the laser scanning speed is 250mm/min, the spot diameter is 1mm, a laser beam irradiates the mixed material through the coaxial powder feeding head 5, the workbench is controlled to move left and right along an X axis, the coaxial powder feeding head 5 moves back and forth along a Y axis or up and down along a Z axis through a control system 3, and the mixed material on the surface of the base material is subjected to cladding treatment by the laser beam, and a composite coating is obtained. Repeating the steps to form 2 layers of composite coating on the surface of the substrate.
Comparative example 4
Compared with example 1, the difference is that Mo element is removed, and the alloy consists of the following raw materials in percentage by mass: 18% Ni, 28% Ti, 17% Al, 25% V, 12% C.
A laser additive alloy based on NiTiAlVC powder, which consists of the following raw materials in percentage by mass: 18% Ni, 28% Ti, 17% Al, 25% V, 12% C.
The preparation method of the composite coating manufactured by the laser additive alloy through laser additive comprises the following steps:
s1: weighing alloy powder with the mass percentage of 18% Ni, 28% Ti, 17% Al, 25% V and 12% C, adding water, ball-milling and mixing, and vacuum drying to obtain a mixed material with the water content of 0.4%;
the parameters of ball milling and mixing are as follows: the rotating speed is 400r/min, and the ball milling time is 20min.
The specific procedure of vacuum drying is as follows: the vacuum degree was 1215Pa, the drying temperature was 85℃and the drying time was 2 hours.
S2: the mixed material in the step S1 is conveyed to processing equipment with controllable cracking of laser, as shown in FIG. 1, the mixed material is conveyed to a powder feeder 1, a base material 7 is fixed on a workbench, an argon gas bottle 2 is opened to convey argon gas flow to a coaxial powder feeding head 5 at a flow rate of 6L/min and blow the argon gas flow to the surface of the base material 7, meanwhile, the argon gas flow is conveyed to the powder feeder 1, the powder feeder 1 is opened to convey the mixed material to the coaxial powder feeding head 5, the mixed material is blown to the surface of the base material 7 through the coaxial powder feeder 5 at a speed of 3g/min, a laser device 4 is opened, the laser power is adjusted to 1500W, the laser scanning speed is 250mm/min, the spot diameter is 1mm, a laser beam irradiates the mixed material through the coaxial powder feeding head 5, the workbench is controlled to move left and right along an X axis, the coaxial powder feeding head 5 moves back and forth along a Y axis or up and down along a Z axis through a control system 3, and the mixed material on the surface of the base material is subjected to cladding treatment by the laser beam, and a composite coating is obtained. Repeating the steps to form 2 layers of composite coating on the surface of the substrate.
Comparative example 5
Compared with example 1, the difference is that the alloy consists of the following raw materials in percentage by mass: 14% Ni, 24% Ti, 13% Al, 21% V, 11% C, 17% Mo.
A laser additive alloy based on NiTiAlVC powder, which consists of the following raw materials in percentage by mass: 14% Ni, 24% Ti, 13% Al, 21% V, 11% C, 17% Mo.
The preparation method of the composite coating manufactured by the laser additive alloy through laser additive comprises the following steps:
s1: weighing alloy powder with the mass percentage of 14% of Ni, 24% of Ti, 13% of Al, 21% of V, 11% of C and 17% of Mo, adding water, performing ball milling and mixing, and performing vacuum drying to obtain a mixed material with the water content of 0.4%;
the parameters of ball milling and mixing are as follows: the rotating speed is 400r/min, and the ball milling time is 20min.
The specific procedure of vacuum drying is as follows: the vacuum degree was 1215Pa, the drying temperature was 85℃and the drying time was 2 hours.
S2: the mixed material in the step S1 is conveyed to processing equipment with controllable cracking of laser, as shown in FIG. 1, the mixed material is conveyed to a powder feeder 1, a base material 7 is fixed on a workbench, an argon gas bottle 2 is opened to convey argon gas flow to a coaxial powder feeding head 5 at a flow rate of 6L/min and blow the argon gas flow to the surface of the base material 7, meanwhile, the argon gas flow is conveyed to the powder feeder 1, the powder feeder 1 is opened to convey the mixed material to the coaxial powder feeding head 5, the mixed material is blown to the surface of the base material 7 through the coaxial powder feeder 5 at a speed of 3g/min, a laser device 4 is opened, the laser power is adjusted to 1500W, the laser scanning speed is 250mm/min, the spot diameter is 1mm, a laser beam irradiates the mixed material through the coaxial powder feeding head 5, the workbench is controlled to move left and right along an X axis, the coaxial powder feeding head 5 moves back and forth along a Y axis or up and down along a Z axis through a control system 3, and the mixed material on the surface of the base material is subjected to cladding treatment by the laser beam, and a composite coating is obtained. Repeating the steps to form 2 layers of composite coating on the surface of the substrate.
Comparative example 6
Compared with example 1, the difference is that the alloy consists of the following raw materials in percentage by mass: 22% Ni, 14% Ti, 18% Al, 17% V, 13% C, 16% Mo.
A laser additive alloy based on NiTiAlVC powder, which consists of the following raw materials in percentage by mass: 22% Ni, 14% Ti, 18% Al, 17% V, 13% C, 16% Mo.
The preparation method of the composite coating manufactured by the laser additive alloy through laser additive comprises the following steps:
s1: weighing alloy powder with the mass percentage of 22% of Ni, 14% of Ti, 18% of Al, 17% of V, 13% of C and 16% of Mo, adding water, performing ball milling and mixing, and performing vacuum drying to obtain a mixed material with the water content of 0.4%;
the parameters of ball milling and mixing are as follows: the rotating speed is 400r/min, and the ball milling time is 20min.
The specific procedure of vacuum drying is as follows: the vacuum degree was 1215Pa, the drying temperature was 85℃and the drying time was 2 hours.
S2: the mixed material in the step S1 is conveyed to processing equipment with controllable cracking of laser, as shown in FIG. 1, the mixed material is conveyed to a powder feeder 1, a base material 7 is fixed on a workbench, an argon gas bottle 2 is opened to convey argon gas flow to a coaxial powder feeding head 5 at a flow rate of 6L/min and blow the argon gas flow to the surface of the base material 7, meanwhile, the argon gas flow is conveyed to the powder feeder 1, the powder feeder 1 is opened to convey the mixed material to the coaxial powder feeding head 5, the mixed material is blown to the surface of the base material 7 through the coaxial powder feeder 5 at a speed of 3g/min, a laser device 4 is opened, the laser power is adjusted to 1500W, the laser scanning speed is 250mm/min, the spot diameter is 1mm, a laser beam irradiates the mixed material through the coaxial powder feeding head 5, the workbench is controlled to move left and right along an X axis, the coaxial powder feeding head 5 moves back and forth along a Y axis or up and down along a Z axis through a control system 3, and the mixed material on the surface of the base material is subjected to cladding treatment by the laser beam, and a composite coating is obtained. Repeating the steps to form 2 layers of composite coating on the surface of the substrate.
Comparative example 7
Compared with example 1, the difference is that the alloy consists of the following raw materials in percentage by mass: 21% Ni, 18% Ti, 19% Al, 21% V, 1% C, 20% Mo.
A laser additive alloy based on NiTiAlVC powder, which consists of the following raw materials in percentage by mass: 21% Ni, 18% Ti, 19% Al, 21% V, 1% C, 20% Mo.
The preparation method of the composite coating manufactured by the laser additive alloy through laser additive comprises the following steps:
s1: weighing alloy powder with the mass percentage of 21% Ni, 18% Ti, 19% Al, 21% V, 1% C and 20% Mo, adding water, ball-milling and mixing, and vacuum drying to obtain a mixed material with the water content of 0.4%;
the parameters of ball milling and mixing are as follows: the rotating speed is 400r/min, and the ball milling time is 20min.
The specific procedure of vacuum drying is as follows: the vacuum degree was 1215Pa, the drying temperature was 85℃and the drying time was 2 hours.
S2: the mixed material in the step S1 is conveyed to processing equipment with controllable cracking of laser, as shown in FIG. 1, the mixed material is conveyed to a powder feeder 1, a base material 7 is fixed on a workbench, an argon gas bottle 2 is opened to convey argon gas flow to a coaxial powder feeding head 5 at a flow rate of 6L/min and blow the argon gas flow to the surface of the base material 7, meanwhile, the argon gas flow is conveyed to the powder feeder 1, the powder feeder 1 is opened to convey the mixed material to the coaxial powder feeding head 5, the mixed material is blown to the surface of the base material 7 through the coaxial powder feeder 5 at a speed of 3g/min, a laser device 4 is opened, the laser power is adjusted to 1500W, the laser scanning speed is 250mm/min, the spot diameter is 1mm, a laser beam irradiates the mixed material through the coaxial powder feeding head 5, the workbench is controlled to move left and right along an X axis, the coaxial powder feeding head 5 moves back and forth along a Y axis or up and down along a Z axis through a control system 3, and the mixed material on the surface of the base material is subjected to cladding treatment by the laser beam, and a composite coating is obtained. Repeating the steps to form 2 layers of composite coating on the surface of the substrate.
Comparative example 8
Compared with example 1, the difference is that the alloy consists of the following raw materials in percentage by mass: 28% Ni, 29% Ti, 27% Al, 10% V, 6% Mo.
A laser additive alloy based on NiTiAlVC powder, which consists of the following raw materials in percentage by mass: 28% Ni, 29% Ti, 27% Al, 10% V, 6% Mo.
The preparation method of the composite coating manufactured by the laser additive alloy through laser additive comprises the following steps:
s1: weighing alloy powder with the mass percentage of 28% of Ni, 29% of Ti, 27% of Al, 10% of V and 6% of Mo, adding water, performing ball milling and mixing, and performing vacuum drying to obtain a mixed material with the water content of 0.4%;
the parameters of ball milling and mixing are as follows: the rotating speed is 400r/min, and the ball milling time is 20min.
The specific procedure of vacuum drying is as follows: the vacuum degree was 1215Pa, the drying temperature was 85℃and the drying time was 2 hours.
S2: the mixed material in the step S1 is conveyed to processing equipment with controllable cracking of laser, as shown in FIG. 1, the mixed material is conveyed to a powder feeder 1, a base material 7 is fixed on a workbench, an argon gas bottle 2 is opened to convey argon gas flow to a coaxial powder feeding head 5 at a flow rate of 6L/min and blow the argon gas flow to the surface of the base material 7, meanwhile, the argon gas flow is conveyed to the powder feeder 1, the powder feeder 1 is opened to convey the mixed material to the coaxial powder feeding head 5, the mixed material is blown to the surface of the base material 7 through the coaxial powder feeder 5 at a speed of 3g/min, a laser device 4 is opened, the laser power is adjusted to 1500W, the laser scanning speed is 250mm/min, the spot diameter is 1mm, a laser beam irradiates the mixed material through the coaxial powder feeding head 5, the workbench is controlled to move left and right along an X axis, the coaxial powder feeding head 5 moves back and forth along a Y axis or up and down along a Z axis through a control system 3, and the mixed material on the surface of the base material is subjected to cladding treatment by the laser beam, and a composite coating is obtained. Repeating the steps to form 2 layers of composite coating on the surface of the substrate.
Comparative example 9
Compared with example 1, the difference is that the alloy consists of the following raw materials in percentage by mass: 11% Ni, 24% Ti, 13% Al, 21% V, 9%C, 22% Mo.
A laser additive alloy based on nitialcmo powder, the alloy consisting of the following raw materials in mass percent: 11% Ni, 24% Ti, 13% Al, 21% V, 9%C, 22% Mo.
The preparation method of the composite coating manufactured by the laser additive alloy through laser additive comprises the following steps:
s1: weighing alloy powder with the mass percentage of 11% of Ni, 24% of Ti, 13% of Al, 21% of V, 9%C and 22% of Mo, adding water, performing ball milling and mixing, and performing vacuum drying to obtain a mixed material with the water content of 0.4%;
the parameters of ball milling and mixing are as follows: the rotating speed is 400r/min, and the ball milling time is 20min.
The specific procedure of vacuum drying is as follows: the vacuum degree was 1215Pa, the drying temperature was 85℃and the drying time was 2 hours.
S2: the mixed material in the step S1 is conveyed to processing equipment with controllable cracking of laser, as shown in FIG. 1, the mixed material is conveyed to a powder feeder 1, a base material 7 is fixed on a workbench, an argon gas bottle 2 is opened to convey argon gas flow to a coaxial powder feeding head 5 at a flow rate of 6L/min and blow the argon gas flow to the surface of the base material 7, meanwhile, the argon gas flow is conveyed to the powder feeder 1, the powder feeder 1 is opened to convey the mixed material to the coaxial powder feeding head 5, the mixed material is blown to the surface of the base material 7 through the coaxial powder feeder 5 at a speed of 3g/min, a laser device 4 is opened, the laser power is adjusted to 1500W, the laser scanning speed is 250mm/min, the spot diameter is 1mm, a laser beam irradiates the mixed material through the coaxial powder feeding head 5, the workbench is controlled to move left and right along an X axis, the coaxial powder feeding head 5 moves back and forth along a Y axis or up and down along a Z axis through a control system 3, and the mixed material on the surface of the base material is subjected to cladding treatment by the laser beam, and a composite coating is obtained. Repeating the steps to form 2 layers of composite coating on the surface of the substrate.
Comparative example 10
Compared with example 2, the difference is that the laser parameters are: the laser power is 1400W, the laser scanning speed is 400mm/min, and the spot diameter is 5mm.
A laser additive alloy based on nitialcmo powder, the alloy consisting of the following raw materials in mass percent: 28% Ni, 29% Ti, 25% Al, 10% V, 2% C, 6% Mo.
The preparation method of the composite coating manufactured by the laser additive alloy through laser additive comprises the following steps:
s1: weighing alloy powder with the mass percentage of 28% of Ni, 29% of Ti, 25% of Al, 10% of V, 2% of C and 6% of Mo, adding water, ball-milling and mixing, and vacuum drying to obtain a mixed material with the water content of 0.5%;
the parameters of ball milling and mixing are as follows: the rotating speed is 400r/min, and the ball milling time is 20min.
The specific procedure of vacuum drying is as follows: the vacuum degree was 1215Pa, the drying temperature was 90℃and the drying time was 2 hours.
S2: the mixed material in the step S1 is conveyed to processing equipment with controllable cracking of laser, as shown in fig. 1, the mixed material is conveyed to a powder feeder 1, a base material 7 is fixed on a workbench, an argon cylinder 2 is opened to convey argon gas flow to a coaxial powder feeding head 5 at a flow of 13L/min and blow the argon gas flow to the surface of the base material 7, meanwhile, the argon gas flow is conveyed to the powder feeder 1, the powder feeder 1 is opened to convey the mixed material to the coaxial powder feeding head 5, the mixed material is blown to the surface of the base material 7 at a speed of 6g/min through the coaxial powder feeder 5, a laser device 4 is opened, the laser power is adjusted to 1400W, the laser scanning speed is 400mm/min, the spot diameter is 5mm, a laser beam irradiates the mixed material through the coaxial powder feeding head 5, the workbench is controlled to move left and right along an X axis, the coaxial powder feeding head 5 moves back and forth along a Y axis or up and down along a Z axis through a control system 3, the mixed material on the surface of the base material is subjected to cladding treatment by the laser beam, and a composite coating is obtained, and the composite coating is formed on the surface of the base material by repeating the steps.
Comparative example 11
The difference compared to example 2 is that the rate of blowing the mixture is 12g/min.
A laser additive alloy based on nitialcmo powder, the alloy consisting of the following raw materials in mass percent: 28% Ni, 29% Ti, 25% Al, 10% V, 2% C, 6% Mo.
The preparation method of the composite coating manufactured by the laser additive alloy through laser additive comprises the following steps:
s1: weighing alloy powder with the mass percentage of 28% of Ni, 29% of Ti, 25% of Al, 10% of V, 2% of C and 6% of Mo, adding water, ball-milling and mixing, and vacuum drying to obtain a mixed material with the water content of 0.5%;
the parameters of ball milling and mixing are as follows: the rotating speed is 400r/min, and the ball milling time is 20min.
The specific procedure of vacuum drying is as follows: the vacuum degree was 1215Pa, the drying temperature was 90℃and the drying time was 2 hours.
S2: the mixed material in the step S1 is conveyed to processing equipment with controllable cracking of laser, as shown in fig. 1, the mixed material is conveyed to a powder feeder 1, a base material 7 is fixed on a workbench, an argon gas bottle 2 is opened to convey argon gas flow to a coaxial powder feeding head 5 at a flow of 13L/min and blow the argon gas flow to the surface of the base material 7, meanwhile, argon gas flow is conveyed to the powder feeder 1, the powder feeder 1 is opened to convey the mixed material to the coaxial powder feeding head 5, the mixed material is blown to the surface of the base material 7 through the coaxial powder feeder 5 at a speed of 12g/min, a laser device 4 is opened, the laser power is adjusted to 1700W, the laser scanning speed is 300mm/min, the spot diameter is 2.5mm, a laser beam irradiates the mixed material through the coaxial powder feeding head 5, the workbench is controlled to move left and right along an X axis, the coaxial powder feeding head 5 moves up and down along a Y axis or along a Z axis, the mixed material on the surface of the base material is subjected to cladding treatment by the laser beam, and a composite coating is obtained, and the steps are repeated, and a composite coating layer 5 is formed on the surface of the base material.
Comparative example 12
The difference compared to example 2 is that the argon flow is 26L/min.
A laser additive alloy based on nitialcmo powder, the alloy consisting of the following raw materials in mass percent: 28% Ni, 29% Ti, 25% Al, 10% V, 2% C, 6% Mo.
The preparation method of the composite coating manufactured by the laser additive alloy through laser additive comprises the following steps:
s1: weighing alloy powder with the mass percentage of 28% of Ni, 29% of Ti, 25% of Al, 10% of V, 2% of C and 6% of Mo, adding water, ball-milling and mixing, and vacuum drying to obtain a mixed material with the water content of 0.5%;
the parameters of ball milling and mixing are as follows: the rotating speed is 400r/min, and the ball milling time is 20min.
The specific procedure of vacuum drying is as follows: the vacuum degree was 1215Pa, the drying temperature was 90℃and the drying time was 2 hours.
S2: the mixed material in the step S1 is conveyed to processing equipment with controllable cracking of laser, as shown in fig. 1, the mixed material is conveyed to a powder feeder 1, a base material 7 is fixed on a workbench, an argon gas bottle 2 is opened to convey argon gas flow to a coaxial powder feeding head 5 at a flow of 26L/min and blow the argon gas flow to the surface of the base material 7, meanwhile, argon gas flow is conveyed to the powder feeder 1, the powder feeder 1 is opened to convey the mixed material to the coaxial powder feeding head 5, the mixed material is blown to the surface of the base material 7 through the coaxial powder feeder 5 at a speed of 6g/min, a laser device 4 is opened, the laser power is adjusted to 1700W, the laser scanning speed is 300mm/min, the spot diameter is 2.5mm, a laser beam irradiates the mixed material through the coaxial powder feeding head 5, the workbench is controlled to move left and right along an X axis, the coaxial powder feeding head 5 moves up and down along a Y axis or along a Z axis, the mixed material on the surface of the base material is subjected to cladding treatment by the laser beam, and a composite coating is obtained, and the steps are repeated, and a composite coating layer 5 is formed on the surface of the base material.
The performance of the laser additive composite coatings based on the nitialcmo powder provided in examples 1 to 7 and comparative examples 1 to 12 above were examined, respectively. The results are shown in Table 1, and examples 1 to 3 are given as examples only, since the properties of the composite coatings of examples 1 to 7 are similar.
Table 1 table for testing the properties of the laser additive composite coatings of the present invention
As can be seen from Table 1, the NiTiAlVCMo powder-based laser additive composite coating prepared by the invention has excellent properties. The composite coatings of the embodiments 1 to 7 of the invention do not generate cracks, and the impact toughness can reach 20.5J/cm 2 The tensile strength is up to 651MPa, and the corrosion current is as low as 2.6 mu A/cm 2 The abrasion loss is as low as 0.4g. While the components and mass percentages of the composite coating, the laser parameters, the blowing speed of the mixture and the argon gas flow rate are respectively adjusted in comparative examples 1-12, the performance of the composite coating obtained in comparative examples 1-12 is not ideal, and the performance is not only shown in the compositeThe number of cracks on the surface of the coating is large, the mechanical property of the coating is poor, the impact toughness and the tensile strength cannot be detected, and the corrosion current and the wear rate are high.
The main reason why the composite coating obtained in the above comparative examples 1 to 12 is poor in performance is that:
Since the V element in comparative example 1 has a positive effect in improving the strength, abrasion resistance, corrosion resistance, and impact resistance of the metal material, the absence of the V element in comparative example 1 directly leads to failure of the four effects. This will significantly reduce the performance of the composite coating. Meanwhile, the V element is absent to obviously raise the proportion of other elements, so that the balance of the reaction process among the elements is destroyed, the performance is further reduced, and finally, the cracks of the composite coating are increased and the performance is reduced.
The V element in comparative examples 2 and 3 is lower than or exceeds a reasonable range, which results in too little or too much V element in the composite coating, and too little V element cannot form a reasonable amount of strengthening phase such as VC, thus weakening the strengthening effect of V element on each property. Excessive V element can form excessive coarse strengthening phase, so that stress concentration phenomenon occurs in the coating, and the coating performance is reduced. In addition, too little or too much V element may cause too low or too high a proportion of other elements, thereby weakening the positive effect of other elements on the performance of the composite coating, and also being unfavorable for improving the performance.
Since Mo element has a positive effect in improving toughness, strength, wear resistance, corrosion resistance, and the like of the metal material, the absence of Mo element in comparative example 4 results in significant degradation of four properties of the coating.
In comparative examples 5 and 6, since the C element can form hard carbides with the metal elements (Cr, co), but when the C content is more than 10%, the hard carbide content excessively increases, resulting in a significant increase in brittleness of the formed coating, and more cracks are generated, resulting in a significant decrease in various properties.
The contents of the C element in comparative examples 7 and 8 were 1% and 0%, respectively, which increased the proportion of other elements, resulting in the balance between the elements being destroyed, thereby adversely affecting the improvement of the performance.
The content of Mo element in comparative example 9 is significantly higher than a reasonable range, so that not only the proportion of other elements can be reduced, but also excessive Mo element can generate a large amount of coarse hard phase, and meanwhile, uneven distribution of elements is caused, thereby being unfavorable for improving the performances of the coating.
In comparative example 10, the reasonable matching between the laser parameters and the powder ratios is destroyed, the range of the laser parameters required by different powder ratios is limited, and the range below or above the range can cause unpredictable negative effects in the preparation process of the composite coating, finally the coating cracks are increased, and various performances are obviously reduced.
The blowing rates in comparative example 11 and comparative example 12 were out of a reasonable range as well as the argon flow, and the desired effect could not be obtained.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (4)

1. The laser additive alloy based on NiTiAlVCMo is characterized by comprising the following raw materials in percentage by mass: 14% -28% of Ni, 15% -29% of Ti, 13% -25% of Al, 10% -21% of V, 2% -9%C and 6% -19% of Mo;
the preparation method of the laser additive coating manufactured by the laser additive alloy through laser additive comprises the following steps:
s1, respectively weighing the following raw materials in percentage by mass: 14% -28% of Ni, 15% -29% of Ti, 13% -25% of Al, 10% -21% of V, 2% -9%C and 6% -19% of Mo; adding water into the weighed raw materials, ball-milling and mixing, and vacuum drying to obtain a mixed material with the water content of 0.4% -1.3%;
s2, conveying the mixed material of the S1 to laser additive manufacturing equipment, blowing the mixed material to the surface of a substrate through a coaxial powder feeding head by adopting argon gas flow, and cladding the mixed material by adopting laser to obtain a composite coating;
laser parameters: the laser power is 1500-190W, the laser scanning speed is 250-350 mm/min, and the spot diameter is 1-4 mm; the blowing speed of the mixed material is 3 g/min-10 g/min; the argon flow is 6L/min-25L/min.
2. The laser additive alloy based on NiTiAlVCMo according to claim 1, wherein in S2, after said composite coating is cooled, repeating the step of S2 to form 2-100 layers of composite coating on the surface of said substrate.
3. The NiTiAlVCMo-based laser additive alloy of claim 1, wherein in S1, the parameters of the ball milling mix are: the rotating speed is 400r/min, and the ball milling time is 20min.
4. The NiTiAlVCMo-based laser additive alloy of claim 1, wherein in S1, the vacuum drying: the vacuum degree is 1215Pa, the drying temperature is 85-120 ℃, and the drying time is 2h.
CN202310920994.8A 2023-07-26 2023-07-26 NiTiAlVCMo powder-based laser additive alloy, composite coating and preparation method of composite coating Active CN116657019B (en)

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CN114908265A (en) * 2022-06-02 2022-08-16 西安斯塔克材料科技有限公司 Preparation method of TiNiAlV quaternary alloy filament

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AU636092C (en) * 1989-11-24 1994-02-24 Energy Conversion Devices Inc. Catalytic hydrogen storage electrode materials for use in electrochemical cells and electrochemical cells incorporating the materials
CN104139877A (en) * 2014-07-17 2014-11-12 内蒙古工业大学 Multi-station one-way limiting corner collecting device
CN111004972A (en) * 2019-12-19 2020-04-14 安徽蜀牛数据科技有限公司 Alloy material for manufacturing large passenger plane undercarriage and preparation method thereof
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