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CN-121992275-A - Gao Niege gold powder, laser cladding transition layer and composite coating, and preparation methods and applications thereof

CN121992275ACN 121992275 ACN121992275 ACN 121992275ACN-121992275-A

Abstract

The invention belongs to the field of materials, and particularly provides high-nickel alloy powder, a laser cladding transition layer, a high-hardness high-toughness corrosion-resistant composite coating, and a preparation method and application thereof. The Gao Niege gold powder comprises, by mass, 0.8% -1.8% of C,0.5% -2.0% of Si,18.0% -22.0% of Cr,45.0% -65.0% of Ni,8.0% -12.0% of Mo,3.5% -5.5% of Nb,0.1% -8.0% of Fe,0.01% -8.0% of W,0.1% -0.25% of N, 0% -10% of Co and 0% -1.0% of Mn. The laser cladding transition layer formed by the high-nickel alloy powder has excellent toughness and interface bonding strength while ensuring high corrosion resistance.

Inventors

  • SHAO ZHIHENG
  • WANG WENLONG
  • WU CHENHONG
  • Zhou Jingnong

Assignees

  • 厦门海翼集团有限公司
  • 厦门银华机械有限公司

Dates

Publication Date
20260508
Application Date
20260407

Claims (10)

  1. 1. The high-nickel alloy powder is characterized by comprising, by mass, 0.8% -1.8% of C,0.5% -2.0% of Si,18.0% -22.0% of Cr,45.0% -65.0% of Ni,8.0% -12.0% of Mo,3.5% -5.5% of Nb,0.1% -8.0% of Fe,0.01% -8.0% of W,0.1% -0.25% of N, 0% -10% of Co and 0% -1.0% of Mn.
  2. 2. The high nickel alloy powder according to claim 1, wherein the Gao Niege gold powder is formed by gas atomization milling of a raw material mixture comprising a metal powder, a carbon powder, a single crystal silicon powder and a nitrogen-containing powder, wherein the metal powder comprises a nickel powder, a chromium powder, a molybdenum powder, a niobium powder, a tungsten powder, an iron powder and optionally a cobalt powder and optionally a manganese powder, and the nitrogen-containing powder is a silicon nitride powder and/or a nickel nitride powder; Preferably, the Gao Niege gold powder has a median particle size of 45-150 μm.
  3. 3. A laser cladding transition layer, characterized in that the high nickel alloy powder is prepared and formed by the laser cladding process according to the claim 1 or 2; Preferably, the thickness of the laser cladding transition layer is 0.5-3 mm.
  4. 4. A method of making the laser cladding transition layer of claim 3, comprising the steps of: (1) Providing the Gao Niege gold powder; (2) Under the protection of inert gas, carrying out multilayer and multi-channel cladding on the Gao Niege gold powder on a substrate by utilizing a laser to form a transition layer; (3) And annealing the transition layer.
  5. 5. The method of claim 4, wherein step (1) comprises: (1-1) uniformly mixing raw materials comprising metal powder, carbon powder, monocrystalline silicon powder and nitrogen-containing powder to obtain a raw material mixture, wherein the metal powder comprises nickel powder, chromium powder, molybdenum powder, niobium powder, tungsten powder, iron powder, optional cobalt powder and optional manganese powder, and the nitrogen-containing powder is silicon nitride powder and/or nickel nitride powder; (1-2) atomizing the raw material mixture to prepare powder, so as to obtain spherical high-nickel alloy powder; Preferably, in the step (2), the operation conditions of the multilayer multi-channel cladding comprise 2.5-4.0 kW of laser power, 5-12 mm/s of scanning speed, 2-4mm of light spot diameter, 35-50% of lap joint rate and 20-35 g/min of powder feeding rate; preferably, in the step (3), the annealing treatment is performed under the operating conditions that the temperature is 550-650 ℃ and the time is 1-2 hours.
  6. 6. The high-hardness high-toughness corrosion-resistant composite coating is characterized by comprising a laser cladding transition layer formed on a substrate and a high-hardness wear-resistant functional layer arranged on the laser cladding transition layer, wherein the laser cladding transition layer is prepared from the high-nickel alloy powder in claim 1 or 2 through a laser cladding process.
  7. 7. The high-hardness, high-toughness and corrosion-resistant composite coating according to claim 6, wherein the high-hardness, wear-resistant functional layer is selected from one or more of an A-type functional layer, a B-type functional layer and a C-type functional layer, The A-type functional layer is an oxide ceramic layer or a composite material layer formed by the mixture of the high nickel alloy powder and the oxide ceramic powder according to claim 1 or 2; The B-type functional layer is a carbide-based cermet layer or a composite material layer formed by the mixture of the high-nickel alloy powder and the carbide-based cermet powder according to claim 1 or 2; the C-shaped functional layer is an electroplated hard chromium layer.
  8. 8. The high-hardness high-toughness corrosion-resistant composite coating according to claim 7, wherein the oxide ceramic in the a-type functional layer is selected from one of Cr 2 O 3 、Al 2 O 3 、TiO 2 or a composite oxide formed by two or more of them; Preferably, in the a-type functional layer, the composite oxide is composed of Al 2 O 3 and TiO 2 , and the mass ratio of TiO 2 is 10% -15%; Preferably, the thickness of the A-type functional layer is 50-300 mu m; Preferably, the carbide-based cermet in the B-type functional layer is at least one selected from WC-Co, WC-CoCr and Cr 3 C 2 -NiCr; Preferably, the thickness of the B-type functional layer is 100-500 μm; preferably, the thickness of the C-shaped functional layer is 20-200 μm.
  9. 9. A method for preparing the high-hardness, high-toughness and corrosion-resistant composite coating according to any one of claims 6-8 is characterized by comprising the steps of forming the high-hardness, high-toughness and corrosion-resistant functional layer on the surface of the laser cladding transition layer; preferably, the high-hardness wear-resistant functional layer is an A-type functional layer and/or a B-type functional layer, and is formed by adopting a supersonic flame spraying process or an atmospheric plasma spraying process, or The high-hardness wear-resistant functional layer is a C-type functional layer and is formed through an electroplating process; Preferably, the operation condition of the supersonic flame spraying process comprises that the adopted fuel is kerosene or fuel gas, and the oxygen flow is 800-1000L/min.
  10. 10. Use of the high nickel alloy powder of claim 1 or 2, the laser cladding transition layer of claim 3 or the high hard tough corrosion resistant composite coating of any one of claims 6 to 8 in marine engineering equipment or chlorine-containing medium chemical equipment.

Description

Gao Niege gold powder, laser cladding transition layer and composite coating, and preparation methods and applications thereof Technical Field The invention belongs to the field of materials, and particularly provides high-nickel alloy powder, a laser cladding transition layer, a high-hardness high-toughness corrosion-resistant composite coating, and a preparation method and application thereof. Background The laser cladding is a surface modification technology, which utilizes high-energy laser beams to synchronously melt alloy powder and the surface of a substrate, and forms a cladding coating which is metallurgically bonded with a matrix after rapid solidification. The technology has good wear resistance and corrosion resistance because of the prepared coating, and is currently applied to surface strengthening and repairing of key parts in the fields of aerospace, energy chemical industry, ocean engineering and the like. Aiming at the extreme environment where corrosion and abrasion of chlorine ions exist in the sea and chemical industry, such as a hydraulic piston rod, a ship propeller shaft system, a deep sea valve and other key components in marine equipment, the marine environment is not only in a high-concentration salt spray or seawater corrosion environment for a long time, but also bears the impact risk caused by the erosion abrasion of sediment and suspended matters in the seawater and alternating load. The severe working conditions put multiple demands on the coating performance, namely, the coating is required to have excellent salt spray corrosion resistance, higher surface hardness, good impact toughness and high bonding strength with a matrix. However, the existing laser cladding coating still has technical difficulties in meeting the requirements of high corrosion resistance, high hardness, high toughness and high bonding strength. In the material design of the high corrosion-resistant coating, an austenite-based alloy with high chromium-nickel-molybdenum content is generally required to ensure the pitting corrosion resistance in a chloride ion environment, but the hardness and the wear resistance of the coating are sacrificed to a certain extent, and the high corrosion-resistant coating is difficult to adapt to the high-wear working condition. On the contrary, if a large amount of carbide forming elements are added or ceramic phases are introduced to improve the hardness, the wear resistance can be improved, but the toughness and the hot cracking resistance of the coating can be affected, the local corrosion resistance is reduced due to uneven structure, and even the bonding strength of the coating and the matrix is weakened. Taking a high-hardness ceramic coating prepared by a thermal spraying process as an example, the interface bonding strength is often insufficient due to the large difference of physical properties of ceramic and metal matrix, and microcracks or flaking are easily generated due to thermal stress under the cold-hot alternating condition of marine environment. In addition, the existing laser cladding coating has the problems of high porosity, high crack sensitivity of a heat affected zone and the like in practical application, and further restricts the reliable application of the laser cladding coating in marine high-end equipment. Aiming at the particularity of the marine environment, the prior laser cladding coating material generally needs to improve the pitting corrosion resistance by improving the content of chromium and molybdenum, but the technical path often faces the problems of high alloy cost or narrower process window, and is difficult to combine corrosion resistance, mechanical property and economy. Therefore, it is necessary to develop a laser cladding coating material capable of simultaneously meeting multiple requirements of salt spray corrosion resistance, high wear resistance, toughness, high bonding strength and the like, so as to meet the severe use requirements of key parts in the fields of ocean, chemical industry and the like under the complex working conditions of chloride ion corrosion and wear. Disclosure of Invention Aiming at the problems existing in the prior art, the invention aims to provide high-nickel alloy powder, a laser cladding transition layer, a high-hardness high-toughness corrosion-resistant composite coating and respective preparation methods and applications thereof. The laser cladding transition layer formed by the high-nickel alloy powder has excellent toughness and interface bonding strength while ensuring high corrosion resistance. In a first aspect, the invention provides high-nickel alloy powder, wherein the chemical components of the Gao Niege alloy powder comprise, by mass, 0.8% -1.8% of C,0.5% -2.0% of Si,18.0% -22.0% of Cr,45.0% -65.0% of Ni,8.0% -12.0% of Mo,3.5% -5.5% of Nb,1.0% -8.0% of Fe,0.01% -8.0% of W,0.1% -0.25% of N, 0% -10% of Co and 0% -1.0% of Mn. In some embodiments of the invention, the Gao Niege gold po