CN111607790A - Cladding agent for laser cladding and preparation method and application thereof - Google Patents

Cladding agent for laser cladding and preparation method and application thereof Download PDF

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Publication number
CN111607790A
CN111607790A CN202010538002.1A CN202010538002A CN111607790A CN 111607790 A CN111607790 A CN 111607790A CN 202010538002 A CN202010538002 A CN 202010538002A CN 111607790 A CN111607790 A CN 111607790A
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cladding
agent
percent
laser
purity
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崔反东
康耀君
孟文媛
徐仰涛
杜永林
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Lanyin University Of Technology Baiyin Institute Of New Materials
Lanzhou University of Technology
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Lanyin University Of Technology Baiyin Institute Of New Materials
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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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Powder Metallurgy (AREA)

Abstract

The invention discloses a cladding agent for laser cladding and a preparation method and application thereof, relating to the technical field of laser cladding remanufacturing, wherein the cladding agent comprises the following raw materials in percentage by weight: 88 to 88.75 percent of Fe, 0.15 to 0.3 percent of C, 0.8 to 1.0 percent of Si, 9.2 to 9.8 percent of Cr and CeO20.2-0.3% and B0.8-1.0%, the cladding agent can form reasonable and uniform hard compounds after laser cladding, the hard compounds naturally transition with a workpiece substrate, the transition region is well combined, the formed cladding layer has fine structure, high hardness, high strength, remarkably improved corrosion resistance and abrasion resistance, and good manufacturability.

Description

Cladding agent for laser cladding and preparation method and application thereof
Technical Field
The invention relates to the technical field of laser cladding remanufacturing, in particular to a cladding agent for laser cladding and a preparation method and application thereof.
Background
The laser cladding technology is characterized in that a layer of material with special physical, chemical or mechanical properties is cladded on the surface of a base material by utilizing high-energy laser beam irradiation through rapid melting, expansion and solidification to form a new material different from the base material so as to make up for the lack of high performance of the base body. According to the performance requirements of workpieces, alloys and metal matrix composite materials with various components can be cladded, and surface coatings with the characteristics of heat resistance, corrosion resistance, wear resistance, friction reduction, oxidation resistance, no magnetism and the like are prepared, so that the materials have tissues and properties which are not possessed by conventional treatment.
The laser cladding technology belongs to the additive manufacturing technology of metal and composite materials thereof, and is an important supporting technology of laser strengthening manufacturing, laser remanufacturing and laser 3D manufacturing technologies. In addition, the laser cladding technology is an additive manufacturing technology which can meet the integrated requirements of forming and forming, can give consideration to both accurate forming and high-performance forming, integrates a plurality of modern advanced technologies such as a laser technology, a computer technology, a numerical control technology and a material technology, and is gradually developed into an advanced technology capable of realizing intelligent manufacturing. Moreover, the laser cladding can solve the problem that the traditional manufacturing method cannot be completed, and is a high and new technology which is mainly supported and promoted by the country.
In the application process of the laser cladding technology, the key problem to be solved is mainly the crack problem of the cladding layer with large area, high thickness and high performance, which puts higher requirements on the laser cladding process and the powder material.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a cladding agent for laser cladding and a preparation method and application thereof, and a workpiece repaired by using the cladding agent through laser cladding has high strength, high hardness, good wear resistance and attractive appearance.
A cladding agent for laser cladding comprises the following raw materials in percentage by weight:
Figure BDA0002537740110000021
preferably, the cladding agent comprises the following raw materials in percentage by weight:
Figure BDA0002537740110000022
preferably, the Fe purity is 99.5% and the particle size is less than 50 μm.
Preferably, the purity of the C is 99.5%, and the granularity is less than 300 meshes.
Preferably, the Si purity is 99.5% and the particle size is less than 50 μm.
Preferably, the Cr purity is 99.5% and the particle size is less than 45 μm.
Preferably, the purity of B is 99.9%, and the particle size is 1-2 μm.
Preferably, the CeO2Purity of 99.99%, granularity of 10-30 μm, primary particle size less than 30nm, and specific surface area greater than 40m2/g。
The preparation method of the cladding agent comprises the following steps: weighing the raw material components according to the weight percentage, and uniformly stirring or ball-milling for 10min to obtain the product.
The cladding agent is applied to synchronous laser cladding or preset laser cladding.
The cladding agent provided by the invention adopts Fe, C, Si, Cr and CeO2B is prepared according to a specific proportion, wherein the iron base can form better fusion with 42CrMo steel, the crack sensitivity is reduced, and the carbon can form hard Cr with chromium6C and Cr7C3The wear resistance of the workpiece can be enhanced, and the carbon can form ferrite with iron to adjust the hardness of the cladding layer; boron forms a large number of dislocations (the dislocations are that one or more rows of atoms at a certain position in the crystal lattice generate certain regular dislocation phenomena), can improve the strength of the cladding layer, and form compounds with iron; CeO (CeO)2The second phase ions can be formed to play a role in binding dislocation, so that the strength is improved, and inclusions, particularly sulfides, in the cladding layer are refined, so that grains are refined.
The invention has the beneficial effects that:
the cladding agent provided by the invention can form reasonable and uniform hard compounds after laser cladding, naturally transits with a workpiece substrate, is well combined with a transition region, and the formed cladding layer has fine structure, high hardness, high strength and remarkably improved corrosion resistance and wear resistance.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a metallographic structure photograph of a workpiece after performing synchronous laser cladding on the workpiece by using a cladding agent in an embodiment of the present invention;
in fig. 1: 1-cladding area, 2-transition area, 3-substrate; the cladding area and the transition area are naturally connected, the combination degree is high, and the cladding layer structure is finer than that of the matrix;
fig. 2 is a metallographic structure photograph of a workpiece after performing synchronous laser cladding on the workpiece by using the cladding agent in an embodiment of the present invention, and it can be seen that the matrix and the transition region can be well fused, and hard particles all enter the matrix;
fig. 3 is an impedance curve of a workpiece before and after synchronous laser cladding of the workpiece using a cladding agent in an embodiment of the present invention;
fig. 4 is a polarization curve of a workpiece before and after synchronous laser cladding of the workpiece using a cladding agent in an embodiment of the invention;
FIGS. 3 and 4 can better illustrate the improved corrosion resistance of the clad workpiece, and the corrosion resistance of the clad workpiece can be realized in a more severe environment;
fig. 5 shows vickers hardness of a cross section of a cladding layer after performing synchronous laser cladding on a workpiece by using a cladding agent in an embodiment of the invention, and the hardness of the cladding layer is more than 2 times stronger than that of a substrate;
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
Example 1
A cladding agent for laser cladding comprises the following raw materials in percentage by weight: fe 88%, C0.2%, Si 0.8%, Cr 9.7%, CeO20.3% and B1.0%, wherein Fe has a purity of 99.5%, a particle size of 45 μm, C has a purity of 99.5%, a particle size of 280 mesh, Si has a purity of 99.5%, a particle size of 45 μm, Cr has a purity of 99.5%, a particle size of 40 μm, B has a purity of 99.9%, a particle size of 1 μm, and CeO2The purity was 99.99% and the particle size was 20 μm.
The preparation method of the cladding agent comprises the following steps: weighing the raw material components according to the weight percentage, and uniformly stirring or ball-milling for 10min to obtain the product.
The cladding agent can be applied to synchronous laser cladding, namely a mode of simultaneously carrying out powder feeding and laser cladding.
Example 2
A cladding agent for laser cladding comprises the following raw materials in percentage by weight: fe88.55%, C0.15%, Si 0.9%, Cr 9.3%, CeO20.3 percent and 0.8 percent of B, wherein the purity of Fe is 99.5 percent, the granularity is 45 mu m, the purity of C is 99.5 percent, the granularity is 280 meshes, the purity of Si is 99.5 percent, the granularity is 45 mu m, the purity of Cr is 99.5 percent, the granularity is 40 mu m, the purity of B is 99.9 percent, the granularity is 1 mu m, CeO is2The purity was 99.99% and the particle size was 20 μm.
The preparation method of the cladding agent comprises the following steps: weighing the raw material components according to the weight percentage, and uniformly stirring or ball-milling for 10min to obtain the product.
The cladding agent can be applied to preset laser cladding, namely, the cladding agent is firstly precoated on a workpiece and then laser cladding is carried out, and the method specifically comprises the following steps: and adding absolute ethyl alcohol into the cladding agent to prepare paste, wherein the volume ratio of the added absolute ethyl alcohol to cladding agent powder is 8-15%, and the mixture is coated on the surface of a workpiece after preparation.
Example 3
A cladding agent for laser cladding comprises the following raw materials in percentage by weight: fe88.15%, C0.25%, Si 0.95%, Cr 9.6%, CeO20.2 percent and 0.85 percent of B, wherein the purity of Fe is 99.5 percent, the granularity is 45 mu m, the purity of C is 99.5 percent, the granularity is 280 meshes, the purity of Si is 99.5 percent, the granularity is 45 mu m, the purity of Cr is 99.5 percent, the granularity is 40 mu m, the purity of B is 99.9 percent, the granularity is 1 mu m, CeO is2The purity was 99.99% and the particle size was 10 μm.
The preparation method of the cladding agent comprises the following steps: weighing the raw material components according to the weight percentage, and uniformly stirring or ball-milling for 10min to obtain the product.
The cladding agent can be applied to synchronous laser cladding or can be prepared into paste by adding a small amount of absolute ethyl alcohol and applied to preset laser cladding.
Example 4
A cladding agent for laser cladding comprises the following raw materials in percentage by weight: fe88.25%, C0.3%, Si 0.95%, Cr 9.45%, CeO20.2 percent and 0.85 percent of B, wherein the purity of Fe is 99.5 percent, the granularity is 45 mu m, the purity of C is 99.5 percent, the granularity is 280 meshes, the purity of Si is 99.5 percent, the granularity is 45 mu m, the purity of Cr is 99.5 percent, the granularity is 40 mu m, the purity of B is 99.9 percent, the granularity is 1 mu m, CeO is2The purity was 99.99% and the particle size was 30 μm.
The preparation method of the cladding agent comprises the following steps: weighing the raw material components according to the weight percentage, and uniformly stirring or ball-milling for 10min to obtain the product.
The cladding agent can be applied to synchronous laser cladding or can be prepared into paste by adding a small amount of absolute ethyl alcohol and applied to preset laser cladding.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims (10)

1. A cladding agent for laser cladding is characterized in that: the cladding agent comprises the following raw materials in percentage by weight:
Figure FDA0002537740100000011
2. the cladding agent for laser cladding as claimed in claim 1, wherein: the cladding agent comprises the following raw materials in percentage by weight:
Figure FDA0002537740100000012
3. the cladding agent for laser cladding as claimed in claim 2, wherein: the purity of the Fe is 99.5%, and the granularity is less than 50 μm.
4. The cladding agent for laser cladding as claimed in claim 2, wherein: the purity of the C is 99.5%, and the granularity is less than 300 meshes.
5. The cladding agent for laser cladding as claimed in claim 2, wherein: the purity of the Si is 99.5%, and the granularity is less than 50 mu m.
6. The cladding agent for laser cladding as claimed in claim 2, wherein: the purity of the Cr is 99.5%, and the granularity is less than 45 mu m.
7. The cladding agent for laser cladding as claimed in claim 2, wherein: the purity of the B is 99.9 percent, and the granularity is 1-2 mu m.
8. The cladding agent for laser cladding as claimed in claim 2, wherein: the CeO2The purity is 99.99 percent and the granularity is 10-30 mu m.
9. A method of preparing a cladding agent according to any one of claims 1 to 7, characterized in that: weighing the raw material components according to the weight percentage, and uniformly stirring or ball-milling for 10min to obtain the product.
10. Use of a cladding agent according to any one of claims 1 to 7, wherein: the cladding agent is applied to preset laser cladding or synchronous laser cladding.
CN202010538002.1A 2020-06-12 2020-06-12 Cladding agent for laser cladding and preparation method and application thereof Pending CN111607790A (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102392243A (en) * 2011-12-22 2012-03-28 广州有色金属研究院 Laser surface cladding method of straightening roller
CN102453910A (en) * 2010-11-02 2012-05-16 沈阳大陆激光技术有限公司 Roller surface laser strengthened coating powder material of roller type crusher
CN104120424A (en) * 2013-08-01 2014-10-29 天津大学 Iron-based laser cladding powder and method for preparing cladding layer using same
CN105132824A (en) * 2015-09-14 2015-12-09 南华大学 High-hardness non-cracking martensite iron-based alloy powder for laser cladding layer and preparation method for high-hardness non-cracking martensite iron-based alloy powder
CN106480380A (en) * 2015-09-02 2017-03-08 沈阳大陆激光工程技术有限公司 A kind of laser manufactures the iron(-)base powder of low-speed heave-load marine diesel engine piston annular groove
CN109402631A (en) * 2018-12-27 2019-03-01 安徽工业大学 High rigidity grad enhancement cold roll and its Laser Melting Cover Layer preparation method
KR102064583B1 (en) * 2018-09-21 2020-01-09 최재용 Amorphous alloy powder exhibiting corrosion and wear resistance properties, manufactruing method thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102453910A (en) * 2010-11-02 2012-05-16 沈阳大陆激光技术有限公司 Roller surface laser strengthened coating powder material of roller type crusher
CN102392243A (en) * 2011-12-22 2012-03-28 广州有色金属研究院 Laser surface cladding method of straightening roller
CN104120424A (en) * 2013-08-01 2014-10-29 天津大学 Iron-based laser cladding powder and method for preparing cladding layer using same
CN106480380A (en) * 2015-09-02 2017-03-08 沈阳大陆激光工程技术有限公司 A kind of laser manufactures the iron(-)base powder of low-speed heave-load marine diesel engine piston annular groove
CN105132824A (en) * 2015-09-14 2015-12-09 南华大学 High-hardness non-cracking martensite iron-based alloy powder for laser cladding layer and preparation method for high-hardness non-cracking martensite iron-based alloy powder
KR102064583B1 (en) * 2018-09-21 2020-01-09 최재용 Amorphous alloy powder exhibiting corrosion and wear resistance properties, manufactruing method thereof
CN109402631A (en) * 2018-12-27 2019-03-01 安徽工业大学 High rigidity grad enhancement cold roll and its Laser Melting Cover Layer preparation method

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Application publication date: 20200901