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CN-121700395-B - Multi-principal element alloy abrasion-resistant coating and preparation method and application thereof

CN121700395BCN 121700395 BCN121700395 BCN 121700395BCN-121700395-B

Abstract

The invention provides a multi-principal element alloy abrasion-resistant coating, a preparation method and application thereof. The multi-principal element alloy abrasion-resistant coating comprises a hard phase and an FCC soft phase, wherein the hard phase comprises MC, M7C3 type core-shell structure carbide and mu phase intermetallic compound, the FCC soft phase comprises Cr 2 Ni 3 and Fe 3 Ni 2 , the core of the M7C3 type core-shell structure carbide is made of FeCoNi, and the shell contains C and Cr elements. The multi-principal element alloy abrasion-resistant coating is prepared from a composite powder material containing 55-75wt% of iron-based amorphous powder and 25-45wt% of nickel-based alloy powder by a laser cladding technology. The multi-principal element alloy abrasion-resistant coating provided by the invention has uniform and compact structure, no obvious defects, good corrosion capacity and lower abrasion rate in a seawater environment.

Inventors

  • PU JIBIN
  • LI SHUAIBING
  • LIU JIAN
  • PANG XUMING

Assignees

  • 中国科学院宁波材料技术与工程研究所

Dates

Publication Date
20260512
Application Date
20260212

Claims (8)

  1. 1. A method for preparing a multi-principal element alloy abrasion-resistant coating, comprising the steps of: Uniformly mixing 55-75wt% of iron-based amorphous powder and 25-45wt% of nickel-based alloy powder to form a composite powder material, wherein the iron-based amorphous powder is Fe 45 Cr 15 Co 8 Mo 23 B 4 C 3 Nb 2 , and the nickel-based alloy powder is Ni 80-90 Fe 0.5-5 Cr 8- 15 Si 1-3 P 1-3 ; Cladding the composite powder material on the surface of a matrix by adopting a laser cladding technology to obtain a multi-principal element alloy abrasion-resistant coating metallurgically bonded with the matrix; The laser cladding technology comprises the following technological conditions of 400-600W of laser power, 15-20 mm/s of cladding scanning speed, 40-50% of lap joint rate, 17.5-18.5 mm of laser focal length, 15-20 disc/min of powder feeding speed, 10-15L/min of gas flow rate of powder feeding gas and 15L/min of cladding shielding gas.
  2. 2. The method according to claim 1, wherein the substrate is preheated to 350 ℃ to 400 ℃ and the composite powder material is clad on the surface of the preheated substrate by a laser cladding technology.
  3. 3. A multi-master alloy erosion resistant coating produced by the method of any one of claims 1 or 2.
  4. 4. The multi-master alloy erosion resistant coating of claim 3 wherein said multi-master alloy erosion resistant coating comprises a hard phase and an FCC soft phase, said hard phase comprising MC, M7C3 type core-shell carbide and mu phase intermetallic compound, said FCC soft phase comprising Cr 2 Ni 3 and Fe 3 Ni 2 , wherein said M7C3 type core-shell carbide core is FeCoNi and said shell comprises C and Cr elements.
  5. 5. The multi-master alloy erosion resistant coating of claim 4 wherein said multi-master alloy erosion resistant coating comprises grain sizes on the order of nanometers or sub-microns.
  6. 6. The multi-component alloy abrasion-resistant coating according to claim 4, wherein the average hardness of the multi-component alloy abrasion-resistant coating is 864-1090 HV 0.2 , the corrosion current density is 4.73X10 -7 A/cm 2 or less, and the abrasion rate is 3.27X10 -7 mm 3 /N.m or less.
  7. 7. The multi-component alloy erosion resistant coating of claim 4 wherein said multi-component alloy erosion resistant coating has a thickness of 600 μm to 800 μm.
  8. 8. An abrasion resistant structure comprising a substrate and a multi-master alloy abrasion resistant coating metallurgically bonded to the substrate, the abrasion resistant structure being made by the method of making of claim 1 or 2.

Description

Multi-principal element alloy abrasion-resistant coating and preparation method and application thereof Technical Field The invention belongs to the technical field of surface abrasion-resistant protection, and particularly relates to a multi-principal element alloy abrasion-resistant coating, a preparation method and application thereof. Background With the development and utilization of marine resources, marine equipment is subjected to more severe service conditions than in the land environment. Corrosion and wear are key factors in the failure of long-term service components in marine environments. There is a significant synergistic effect between wear and corrosion that can greatly accelerate material failure, with the total damage far exceeding the simple superposition of the two effects alone. Therefore, the development of abrasion-resistant protective coating technology is an urgent need for controlling the abrasion damage of key mechanical moving parts, and is a necessary way for solving the abrasion and corrosion problems of high-end marine equipment systems. At present, the preparation methods of the wear-resistant and corrosion-resistant coating mainly comprise thermal spraying, vapor deposition, laser cladding and the like. The laser cladding technology is characterized in that cladding materials are added on the surface of a base material, and the high-energy laser beams are used for fusing the cladding materials and the surface of the base material, so that metallurgical bonding between a coating and a matrix is realized, and the laser cladding technology has great potential in development of abrasion-resistant protective coatings of large-scale mechanical heavy-load high-shear working condition moving parts of marine equipment. However, iron-based amorphous coatings are very prone to cracking during laser cladding due to the inherent brittleness of iron-based amorphous alloys and the relatively high thermal, structural and residual stresses generated during laser cladding. At present, strategies for inhibiting cracking of a laser cladding iron-based amorphous coating are mainly focused on substrate preheating, ultra-high speed laser cladding, wide beam laser cladding diameter, triple laser scanning strategies and the like, and the methods are far from practical engineering application and have severe requirements on equipment and environment. Therefore, developing a method capable of retaining the abrasion resistance of the iron-based amorphous coating and inhibiting the cracking problem of the iron-based amorphous coating in the laser cladding process is one of the problems to be solved. Disclosure of Invention In order to solve all or part of the technical problems, the invention provides the following technical scheme: The first aspect of the invention provides a multi-principal element alloy abrasion-resistant coating, which comprises a hard phase and an FCC soft phase, wherein the hard phase comprises MC, M7C3 type core-shell structure carbide and mu phase intermetallic compound, the FCC soft phase comprises Cr 2Ni3 and Fe 3Ni2, the core of the M7C3 type core-shell structure carbide is made of FeCoNi, and the shell contains C and Cr elements. In some embodiments, the multi-component alloy abrasion-resistant coating is prepared from a composite powder material containing 55-75wt% of iron-based amorphous powder and 25-45wt% of nickel-based alloy powder by a laser cladding technology, wherein the iron-based amorphous powder is FeCrCoMoBCNb, and the nickel-based alloy powder is NIFECRSIP. The multi-principal element alloy abrasion-resistant coating has uniform and compact structure, no obvious defects, excellent toughness and abrasion resistance, and good corrosion resistance. In some embodiments, the iron-based amorphous powder is Fe 45Cr15Co8Mo23B4C3Nb2 and the nickel-based alloy powder is Ni 80-90Fe0.5-5Cr8-15Si1-3P1-3. In some embodiments, the multi-component alloy erosion resistant coating includes grains having a size on the order of nanometers or submicron. In some embodiments, the multi-component alloy erosion resistant coating has an average hardness of 864 to 1090 HV 0.2, an erosion current density of 4.73X10 -7A/cm2 or less, and an erosion rate of 3.27X10 -7mm3/N.m or less. In some embodiments, the thickness of the multi-component alloy erosion resistant coating is 600 μm to 800 μm. In a second aspect, the invention provides a method for preparing an abrasion-resistant coating of a multi-principal element alloy, comprising: Uniformly mixing 55-75wt% of iron-based amorphous powder and 25-45wt% of nickel-based alloy powder to form a composite powder material; And cladding the composite powder material on the surface of a matrix by adopting a laser cladding technology to obtain the multi-principal element alloy abrasion-resistant coating metallurgically bonded with the matrix. According to the invention, the nickel-based alloy powder is introduced into the iron-based amorphous powde