CN112501607A - Preparation method of chromium-containing wear-resistant corrosion-resistant coating - Google Patents

Preparation method of chromium-containing wear-resistant corrosion-resistant coating Download PDF

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CN112501607A
CN112501607A CN202011281960.1A CN202011281960A CN112501607A CN 112501607 A CN112501607 A CN 112501607A CN 202011281960 A CN202011281960 A CN 202011281960A CN 112501607 A CN112501607 A CN 112501607A
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laser
resistant
weight percent
chromium
coating
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曾和平
黄延伟
胡梦云
熊利
张鸿鹏
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East China Normal University
Chongqing Institute of East China Normal University
Shanghai Langyan Optoelectronics Technology Co Ltd
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East China Normal University
Chongqing Institute of East China Normal University
Shanghai Langyan Optoelectronics Technology Co Ltd
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/0035—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like
    • B08B7/0042—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like by laser
    • 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
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C19/00—Alloys based on nickel or cobalt
    • C22C19/03—Alloys based on nickel or cobalt based on nickel
    • C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
    • C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
    • C22C19/055—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 20% but less than 30%
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C19/00—Alloys based on nickel or cobalt
    • C22C19/03—Alloys based on nickel or cobalt based on nickel
    • C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
    • C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
    • C22C19/056—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 10% but less than 20%
    • 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
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • 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
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • 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
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
    • 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
    • C22C38/30—Ferrous alloys, e.g. steel alloys containing chromium with cobalt
    • 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
    • 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
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B22F2009/0824—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid with a specific atomising fluid
    • 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
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B22F2009/0824—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid with a specific atomising fluid
    • B22F2009/0828—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid with a specific atomising fluid with water

Abstract

The invention discloses a preparation method of a chromium-containing wear-resistant corrosion-resistant coating, which comprises the following specific steps: (1) carrying out laser cleaning on a base material workpiece by using a laser technology to remove rusty spots and pollution particles; (2) the wear-resistant and corrosion-resistant coating is cladded on the surface of a clean workpiece by adopting a laser cladding technology, and the coating comprises the following materials: fe. Ni, Si, C, B, Cr, Mn, W, Mo, Co, Yb, Zr; (3) the chromium-containing wear-resistant and corrosion-resistant coating is laser-clad on the workpiece by controlling the laser power, the spot size, the scanning speed, the multi-pass lapping rate and the powder feeding mode and speed, the coating and the substrate form metallurgical compact combination, the combination strength is high, the workpiece is not easy to fall off under the long-term operation condition, and meanwhile, the coating can achieve the wear resistance and corrosion resistance required by the actual working condition on the workpiece by properly adjusting the chromium content. The invention improves the bonding strength of the chromium-containing coating and the substrate, improves the production efficiency, reduces the environmental pollution and has wide application prospect.

Description

Preparation method of chromium-containing wear-resistant corrosion-resistant coating
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to a preparation method of a chromium-containing wear-resistant corrosion-resistant coating.
Background
In recent years, due to rapid economic development, in industries such as oil exploitation, marine ships, mining machinery, electric power engineering and the like, requirements on parts, particularly shaft parts, are higher and higher, the important characteristic of the parts is that the parts have excellent wear resistance and corrosion resistance, which determine the service life of the whole device, and the wear and corrosion of the parts not only influence the production progress, but also further increase the cost and even cause resource waste. In recent years, chromium is an indispensable important alloy element in various wear-resistant and corrosion-resistant alloy materials developed, the chromium has excellent high-temperature oxidation resistance, and the hard chromium coating not only has high melting point and good chemical stability, but also has high hardness and can resist wear and deformation caused by long-term operation. Although the current electroplated chromium layer which is commonly used in industry has low cost and good and uniform chromium layer hardness, the combination of the hard chromium layer and the base material is basically physical combination, the combination force is poor, bubbles, oxidation, cracks and the like are easily caused to cause failure of the plating layer after long-term use, and the phenomenon of serious environmental pollution also exists in the electroplated chromium.
The laser cladding technology is a process for cladding a coating with special performance on a designated area of the surface of a workpiece by adopting a laser beam so as to improve the surface performance of the workpiece, alloy powder is synchronously added into a laser molten pool through an automatic powder feeder, and the cladding process is completed according to a preset track. The laser cladding coating has the advantages of environment protection, compact cladding layer, high bonding strength with a base material and the like, and has the remarkable characteristics that the cladding layer and the base material can achieve metallurgical bonding, cracks and pores of the cladding layer can be reduced to the maximum extent, the bonding strength of the cladding layer and the base material is enhanced, the service life of parts is greatly prolonged, a certain content of chromium is added into the alloy powder, the demand of pure chromium plating is saved, the corrosion resistance and the bonding strength with the base material are improved while the hardness of the cladding layer is ensured to meet the demand, and a certain amount of Si is added into the iron-based or nickel-based alloy powder C. B, Cr, Mn, W, Mo, Co, Yb and Zr, the chromium powder content is controlled to be between 14.2 wt% and 25.2 wt%, so that the chromium powder not only can be well jointed and transited with a steel base material, but also can improve the wear resistance and corrosion resistance of the coating, if the chromium content is too high, cracks can be generated in the cladding process, the hardness of the final cladding layer is easily reduced due to too low chromium content, and meanwhile, rare earth elements such as Yb or Zr are added, so that the laser energy can be fully absorbed to catalyze the formation process of the coating, and the production efficiency is improved.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a preparation method of a chromium-containing wear-resistant corrosion-resistant coating, which comprises the following steps: a preparation method of chromium-containing wear-resistant corrosion-resistant coating is characterized by comprising the following steps: after the workpiece is subjected to laser cleaning, the wear-resistant and corrosion-resistant coating is subjected to laser cladding by taking metal alloy powder as a raw material, and the coating comprises the following raw materials in parts by weight: si: 0.5-1.3 wt%, C: 0.1 to 0.2 weight percent of B, 0.1 to 0.15 weight percent of B, 14.2 to 25.2 weight percent of Cr, 0.1 to 0.4 weight percent of Mn, 1 to 5 weight percent of W, 1 to 20 weight percent of Mo, 0 to 5 weight percent of Co, 0 to 1 weight percent of Yb, 0 to 0.5 weight percent of Zr and the balance of Fe; si: 0.5-1.3 wt%, C: 0.1 to 0.2 wt%, B0.1 to 0.15 wt%, Cr 14.2 to 25.2 wt%, Mn 0.1 to 0.4 wt%, W1 to 5 wt%, Mo: 1-20 wt%, Co 0-5 wt%, Yb 1 wt%, Zr 0.5 wt%, and the balance N; controlling the laser power, the spot size, the scanning speed, the lap joint rate, the powder feeding mode and the powder feeding speed to carry out laser cladding on the chromium-containing wear-resistant anti-corrosion compact coating on the workpiece.
Preferably, the metal alloy powder is prepared by atomization, the atomization comprises airflow atomization and water atomization, the airflow atomization pressure range is 0.5-5MPa, the water atomization pressure range is 3-300MPa, and the finally prepared metal alloy powder has the particle size range of 48-160 microns.
Preferably, the gold alloy powder can be subjected to high-energy ball milling according to needs and then added with a binder and the like for granulation, so that microscopic particles are uniform and fine, and the bonding strength of the cladding layer and the base material is improved; the base material is carbon steel or alloy steel.
Preferably, the gold alloy powder may be adjusted to add rare earth elements Yb and Zr as needed.
The preferred preparation method of the chromium-containing wear-resistant corrosion-resistant coating comprises the following steps:
(1) laser cleaning: firstly, adopting laser to remove rust, controlling laser energy density to reach ablation threshold value of rust layer to implement cleaning action, and laser power density range is 5X 106W/cm2 to 5X 108W/cm2, removing submicron-sized pollution particles simultaneously, and then cleaning the surface of the workpiece by using a detergent and removing oil stains; substances with strong reducibility, such as carbon powder, copper powder and the like, can also be added during laser cleaning to promote thorough cleaning;
(2) laser cladding: the laser power in the laser cladding process is controlled at 1200-3000W, the spot size is 3-10mm, the multi-channel cladding lap-joint rate range is 45% -60%, and the scanning speed is 5-18 mm/s; the gravity powder feeding method or the argon synchronous powder feeding method is adopted in the laser cladding process, the cladding thickness is 0-0.8 mm, and the laser cladding process can be finished to the target thickness by a machine tool according to the thickness requirement of a workpiece.
Preferably, the cladding layers with different performances can be obtained by adjusting the content of each element component of the laser cladding wear-resistant anti-corrosion coating.
Preferably, the hardness of the laser cladding coating is more than 60, and the average roughness of the laser cladding coating before finish machining is 3.5-8.5 microns.
The invention has the beneficial effects that:
the thickness of the cladding layer is 0.8mm, and the cladding layer can be finely processed to the target thickness by a machine tool according to the thickness requirement of a workpiece. The obtained cladding layer has wear resistance, the hardness can reach more than 60, the formed cladding layer is compact, the bonding strength with a No. 45 steel base material is high, the cladding layer is suitable for parts such as shafts and the like under various working conditions, the cladding layer is not easy to oxidize and fall off after long-term working, and the cladding layer plays a role in corrosion resistance.
Drawings
FIG. 1 is a technical flow chart of laser cladding chromium-containing coatings;
FIG. 2 is a partial laser cladding of a chromium-containing coated actual workpiece.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
Example 1, a workpiece made of 45 # steel was subjected to laser cleaning and rust removal, the laser energy density was controlled to reach the ablation threshold of the rust layer to achieve cleaning, and the laser power density was 10 × 107W/cm2, and simultaneously removing submicron-sized pollution particlesCleaning the surface of the workpiece by using a detergent and removing oil stains for later use; fixing a workpiece on a laser cladding worktable, and carrying out laser cladding on a wear-resistant and corrosion-resistant coating by taking metal alloy powder as a raw material, wherein the coating comprises the following raw materials in parts by weight: si: 1.2 wt%, C: 0.2 wt%, B0.12 wt%, Cr 20.2 wt%, Mn 0.1 wt%, W2 wt%, Mo: 15 wt%, 1 wt% of Co, 1 wt% of Yb and the balance of Fe, adopting argon gas to blow powder and synchronously feeding the powder to carry out laser cladding, controlling the laser power of 3000W, the spot size of 10mm multiplied by 10mm, the scanning speed of 10mm/s and the lap joint rate of 60%, and carrying out laser cladding on the workpiece to obtain the chromium-containing wear-resistant anticorrosive dense coating. The thickness of the cladding layer is 0.8mm, and the cladding layer can be finely processed to the target thickness by a machine tool according to the thickness requirement of a workpiece. The obtained cladding layer has wear resistance and hardness of 62, and the formed cladding layer is compact and has high bonding strength with a No. 45 steel base material. FIG. 1 is a flow chart of laser cladding of a chromium-containing coating, FIG. 2 is a flow chart of multi-channel laser cladding of a chromium-containing coating, wherein a bright part is machined after cladding, and the rest is unmachined after cladding.
Embodiment 2, a workpiece is subjected to laser cleaning and derusting, the laser energy density is controlled to reach the ablation threshold of a rust layer to realize the cleaning effect, the laser power density is 10 multiplied by 107W/cm2, meanwhile, submicron-sized pollution particles are removed, and then the surface of the workpiece is subjected to cleaning treatment by using a detergent and oil stain is removed for later use; fixing a workpiece on a laser cladding worktable, and carrying out laser cladding on a wear-resistant and corrosion-resistant coating by taking metal alloy powder as a raw material, wherein the coating comprises the following raw materials in parts by weight: si: 1.2 wt%, C: 0.2 wt%, B0.12 wt%, Cr 18.2 wt%, Mn 0.1 wt%, W2 wt%, Mo: 15 wt%, 1 wt% of Co, 1 wt% of Yb and the balance of Fe, adopting argon gas to blow powder and synchronously feeding the powder to carry out laser cladding, controlling the laser power of 3000W, the spot size of 7mm multiplied by 7mm, the scanning speed of 10mm/s and the lap joint rate of 45%, and carrying out laser cladding on the workpiece to obtain the chromium-containing wear-resistant anticorrosive dense coating. The thickness of the cladding layer is 0.5mm, and the cladding layer can be finely processed to the target thickness by a machine tool according to the thickness requirement of a workpiece. The obtained cladding layer had wear resistance and had a hardness of 61.
EXAMPLE 3 laser cleaning and Rust removal of a workpiece, controlling the laser energy density to achieve ablation of the rusted layerThe etching threshold value realizes the cleaning effect, and the laser power density is 10 multiplied by 107W/cm2, removing submicron-grade pollution particles, cleaning the surface of the workpiece by using a detergent, and removing oil stains for later use; fixing a workpiece on a laser cladding worktable, and carrying out laser cladding on a wear-resistant and corrosion-resistant coating by taking metal alloy powder as a raw material, wherein the coating comprises the following raw materials in parts by weight: si: 1.2 wt%, C: 0.2 wt%, B0.12 wt%, Cr 20.2 wt%, Mn 0.1 wt%, W2 wt%, Mo: 15 wt%, 1 wt% of Co, 1 wt% of Yb, 0.5 wt% of Zr and the balance of Ni, argon is adopted to blow powder and synchronously send powder to carry out laser cladding, the laser power is controlled to be 3000W, the spot size is 10mm multiplied by 10mm, the scanning speed is 10mm/s, the lap joint rate is 60%, and the chromium-containing wear-resistant anticorrosive dense coating is carried out on the workpiece by laser cladding. The thickness of the cladding layer is 0.8mm, and the cladding layer can be finely processed to the target thickness by a machine tool according to the thickness requirement of a workpiece. The obtained cladding layer has the wear-resisting property, the hardness is 65, the formed cladding layer is compact, and the bonding strength with a No. 45 steel base material is high.
Example 4, the workpiece was cleaned and derusted by laser, the energy density of the laser was controlled to reach the ablation threshold of the rust layer to achieve the cleaning effect, and the laser power density was 10 × 107W/cm2, removing submicron-grade pollution particles, cleaning the surface of the workpiece by using a detergent, and removing oil stains for later use; fixing a workpiece on a laser cladding worktable, and carrying out laser cladding on a wear-resistant and corrosion-resistant coating by taking metal alloy powder as a raw material, wherein the coating comprises the following raw materials in parts by weight: si: 1.2 wt%, C: 0.2 wt%, B0.12 wt%, Cr 18.2 wt%, Mn 0.1 wt%, W2 wt%, Mo: 15 wt%, 1 wt% of Co, 1 wt% of Yb, 0.5 wt% of Zr and the balance of Ni, argon is adopted to blow powder and synchronously send powder to carry out laser cladding, the laser power is controlled to be 3000W, the spot size is controlled to be 7mm multiplied by 7mm, the scanning speed is controlled to be 10mm/s, the lap joint rate is controlled to be 45%, and the chromium-containing wear-resistant anticorrosive dense coating is carried out on the workpiece by laser cladding. The thickness of the cladding layer is 0.5mm, and the cladding layer can be finely processed to the target thickness by a machine tool according to the thickness requirement of a workpiece. The obtained cladding layer has wear resistance and hardness of 62.
Although the above examples describe preferred embodiments of the invention, these embodiments are provided by way of example only. It will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.

Claims (7)

1. A preparation method of chromium-containing wear-resistant corrosion-resistant coating is characterized by comprising the following steps: after the workpiece is subjected to laser cleaning, the wear-resistant and corrosion-resistant coating is subjected to laser cladding by taking metal alloy powder as a raw material, and the coating comprises the following raw materials in parts by weight: si: 0.5-1.3 wt%, C: 0.1 to 0.2 weight percent of B, 0.1 to 0.15 weight percent of B, 14.2 to 25.2 weight percent of Cr, 0.1 to 0.4 weight percent of Mn, 1 to 5 weight percent of W, 1 to 20 weight percent of Mo, 0 to 5 weight percent of Co, 0 to 1 weight percent of Yb, 0 to 0.5 weight percent of Zr and the balance of Fe; si: 0.5-1.3 wt%, C: 0.1 to 0.2 weight percent of B, 0.1 to 0.15 weight percent of B, 14.2 to 25.2 weight percent of Cr, 0.1 to 0.4 weight percent of Mn, 1 to 5 weight percent of W, 1 to 20 weight percent of Mo, 0 to 5 weight percent of Co, 1 weight percent of Yb, 0.5 weight percent of Zr and the balance of Ni; controlling the laser power, the spot size, the scanning speed, the lap joint rate, the powder feeding mode and the powder feeding speed to carry out laser cladding on the chromium-containing wear-resistant anti-corrosion compact coating on the workpiece.
2. The method for preparing a chromium-containing wear-resistant corrosion-resistant coating according to claim 1, wherein the method comprises the following steps: the metal alloy powder is prepared by atomization, wherein the atomization comprises airflow atomization and water atomization, the airflow atomization pressure range is 0.5-5MPa, the water atomization pressure range is 3-300MPa, and the particle size range of the finally prepared metal alloy powder is 48-160 mu m.
3. The method for preparing a chromium-containing wear-resistant corrosion-resistant coating according to claim 1, wherein the method comprises the following steps: the alloy powder can be subjected to high-energy ball milling according to needs and then added with a binder and the like for granulation, so that microscopic particles are uniform and fine, the bonding strength of the cladding layer and the base material is improved, and the compactness of the cladding layer is improved; the base material is carbon steel or alloy steel.
4. The method for preparing a chromium-containing wear-resistant corrosion-resistant coating according to claim 1, wherein the method comprises the following steps: the metal alloy powder can be added with rare earth elements Yb and Zr according to the requirement; yb element can absorb laser energy to catalyze reaction, so that the self-propagating growth of the coating is realized; the Zr element may improve the corrosion resistance of the coating.
5. The method for preparing a chromium-containing wear-resistant corrosion-resistant coating according to claim 1, which comprises the following steps:
(1) laser cleaning: firstly, adopting laser to remove rust, controlling laser energy density to reach ablation threshold value of rust layer to implement cleaning action, and laser power density range is 5X 106W/cm2To 5X 108W/cm2Simultaneously removing submicron-scale pollution particles, and then cleaning the surface of the workpiece by using a detergent and removing oil stains; substances with strong reducibility can be added during laser cleaning, and the substances are used for reacting with oxygen and the like during high-power laser cleaning so as to promote efficient and thorough cleaning, and carbon powder and copper powder can be selected;
(2) laser cladding: the laser power in the laser cladding process is controlled at 1200-3000W, the spot size is 3-10mm, the multi-channel cladding lap-joint rate range is 45% -60%, and the scanning speed is 5-18 mm/s; the laser cladding process adopts a gravity powder feeding method or an argon synchronous powder feeding method, the cladding thickness is 0.1-0.8mm, and the laser cladding process can adopt a machine tool to finish the laser cladding process to the target thickness according to the thickness requirement of a workpiece.
6. The method for preparing a chromium-containing wear-resistant corrosion-resistant coating according to claim 1, wherein the method comprises the following steps: the cladding layers with different hardness and corrosion resistance can be obtained by adjusting the content of each element component of the laser cladding wear-resistant corrosion-resistant coating.
7. The method for preparing a chromium-containing wear-resistant corrosion-resistant coating according to claim 1, wherein the method comprises the following steps: the hardness of the laser cladding coating is above 60, and the average roughness of the laser cladding coating before finish machining is between 3.5 and 8.5 mu m.
CN202011281960.1A 2020-11-17 2020-11-17 Preparation method of chromium-containing wear-resistant corrosion-resistant coating Pending CN112501607A (en)

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CN115747786A (en) * 2022-09-17 2023-03-07 兰州城市学院 Enhancement treatment method for laser cladding of ultra-thick material at X80 steel welding joint

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