Search

CN-121992365-A - Wear-resistant and corrosion-resistant material and preparation method thereof, wear-resistant and corrosion-resistant plunger rod and preparation method and application thereof

CN121992365ACN 121992365 ACN121992365 ACN 121992365ACN-121992365-A

Abstract

The invention relates to the field of functional materials, and discloses a wear-resistant and corrosion-resistant material, a preparation method thereof, a wear-resistant and corrosion-resistant plunger rod, a preparation method thereof and application thereof. The wear-resistant and corrosion-resistant material and the wear-resistant and corrosion-resistant plunger rod provided by the invention have excellent wear resistance and corrosion resistance.

Inventors

  • WANG SHAOLONG
  • FU ANQING
  • LIN KAI
  • HUO CHUNYONG
  • YIN CHENGXIAN

Assignees

  • 中国石油天然气集团有限公司
  • 中国石油集团工程材料研究院有限公司

Dates

Publication Date
20260508
Application Date
20241106

Claims (20)

  1. 1. A wear-resistant and corrosion-resistant material is characterized in that the surface of the material comprises a wear-resistant and corrosion-resistant coating, wherein the wear-resistant and corrosion-resistant coating sequentially comprises a Si interface layer, a nano TiCN layer and a nano SiC layer from the inner interface of the coating to the outer surface of the coating.
  2. 2. The material according to claim 1, wherein, The Si interface layer has a thickness of 0.5-1 μm, and/or The thickness of the nano TiCN layer is 15-20 mu m, and/or The thickness of the nano SiC layer is 12-18 mu m.
  3. 3. A material according to claim 1 or 2, characterized in that, In the nano TiCN layer, the grain size of nano TiCN is 100-200 nm, and/or In the nano SiC layer, the grain size of the nano SiC is 50-150 nm.
  4. 4. The material according to claim 3, wherein, In the nano TiCN layer, the grain size of the nano TiCN is 100-150 nm.
  5. 5. A material according to claim 1 or 2, characterized in that, The matrix material of the material is one or more of carbon steel, stainless steel, corrosion resistant alloy and ceramic, and/or The matrix of the material is one or more of plunger rod, ceramic, carbon-based material, corrosion-resistant alloy and steel; the wear-resistant corrosion-resistant coating is formed on the inner surface and/or the outer surface of the substrate.
  6. 6. The material according to claim 1 or 2, wherein the bonding force between the layers of the wear-resistant and corrosion-resistant coating is 30-60 n.
  7. 7. A material according to claim 1 or 2, characterized in that, The wear-resistant and corrosion-resistant coating has an average friction coefficient of 0.1-0.5 and/or The wear-resistant and corrosion-resistant coating has an average wear rate of 1X 10 -7 ～40×10 -7 mm 3 N -1 m -1 and/or The average corrosion rate of the wear-resistant anticorrosive coating is 0.003-0.08 mm/a.
  8. 8. A wear-resistant and corrosion-resistant plunger rod, which comprises a plunger rod matrix and a wear-resistant and corrosion-resistant coating formed on the surface of the plunger rod matrix, wherein the wear-resistant and corrosion-resistant coating is the wear-resistant and corrosion-resistant coating according to any one of claims 1-7.
  9. 9. A method for preparing the wear-resistant and corrosion-resistant material as claimed in any one of claims 1 to 7, which is characterized in that the method comprises the steps of sequentially forming an Si interface layer, a nano TiCN layer and a nano SiC layer on the surface of a substrate.
  10. 10. The method according to claim 9, wherein, The Si interface layer is formed by hot filament chemical vapor deposition and/or The method for forming the nano TiCN layer is a high vacuum chemical vapor deposition method and/or The method for forming the nano SiC layer is a high vacuum chemical vapor deposition method.
  11. 11. The method according to claim 9 or 10, further comprising a substrate cleaning step S1) of cleaning the substrate surface by high-energy plasma under vacuum.
  12. 12. The process according to claim 11, wherein in step S1), Vacuum degree of 1X 10 -4 ～5×10 -4 Pa, and/or The high-energy plasma is one or more of Ar and H 2 、SiH 4 , and/or The cleaning time is 20-40 min.
  13. 13. The method according to claim 10, wherein the step S2) of forming the Si interface layer on the substrate surface by hot filament chemical vapor deposition includes: The Si source is one or more of SiH 4 , dichlorosilane, tetramethylsilane, and/or Vacuum degree of 1X 10 -4 ～5×10 -4 Pa, and/or The hot wire loading bias is 0.1-2.5 kv, and/or The siliconizing temperature is 30-200 ℃ and/or The siliconizing time is 0.2-4 h.
  14. 14. The method of claim 10, wherein the step S3) of forming the nano TiCN layer by high vacuum chemical vapor deposition includes: (a) Placing the substrate with the Si interface layer into a vacuum chamber, vacuumizing, and introducing gas; (b) Heating the vacuum chamber, and then introducing TiCN-containing precursor gas to perform chemical vapor deposition; (c) And stopping introducing gas after the deposition is finished, and cooling.
  15. 15. The process of claim 14, wherein in step (a), Said vacuum degree is 5X 10 -4 ～5×10 -3 Pa, and/or The gas is a mixed gas of reducing gas and inert gas, the flow ratio of the reducing gas to the inert gas is 1-3:1, and/or The gas flow is 200-400 sccm.
  16. 16. The process of claim 14, wherein in step (b), Deposition temperature of 600-800℃, and/or Deposition pressure of 30-120 Pa, and/or Deposition time is 2-5 h, and/or The precursor gases include Ti source gas, C source gas, N source gas, and hydrogen gas.
  17. 17. The method according to claim 16, wherein in the step (b), The Ti source gas is one or more of titanium tetrachloride, titanium trichloride and titanium dichloride, and/or The C source gas is one or more of methane, ethane, ethylene, propylene, acetylene and acetonitrile, and/or The N source gas is one or more of nitrogen, ammonia and acetonitrile, and/or The flow rate of the Ti source gas is 50-300 sccm, and/or The flow rate of the C source gas is 50-300 sccm, and/or The flow rate of the N source gas is 50-300 sccm, and/or The flow rate of the hydrogen is 50-200 sccm.
  18. 18. The process of claim 14, wherein in step (c), And cooling to 400-600 ℃.
  19. 19. The method according to claim 9 or 10, wherein the step S4) of forming the nano SiC layer on the nano TiCN layer surface by high vacuum chemical vapor deposition includes: (d) Introducing reducing gas into the vacuum chamber, and preserving heat; (e) And introducing a reaction gas to perform chemical vapor deposition.
  20. 20. The method of claim 19, wherein in step (d), The flow rate of the reduced gas is 100-300 sccm, and/or The reducing gas is hydrogen and/or The heat preservation temperature is 400-600 ℃ and/or The heat preservation time is 1-3 h.

Description

Wear-resistant and corrosion-resistant material and preparation method thereof, wear-resistant and corrosion-resistant plunger rod and preparation method and application thereof Technical Field The invention relates to the field of functional materials, in particular to a wear-resistant and corrosion-resistant material and a preparation method thereof, and a wear-resistant and corrosion-resistant plunger rod and a preparation method and application thereof. Background Plunger rods are a critical component of plunger pumps and are also one of the important tools for oil and gas fields. The plunger rod achieves crude oil extraction by reciprocating within the plunger pump. The service environment of the plunger pump is usually solid-liquid-gas multiphase medium containing solid particles, crude oil, inorganic salt, high pH water and the like, and the plunger rod is extremely easy to wear and corrode in the multiphase fluid medium environment, so that the plunger rod is invalid and overhauled, and the production efficiency is seriously influenced. Therefore, how to improve the abrasion resistance and corrosion resistance of the plunger rod in multiphase flow corrosion and abrasion environment becomes a problem to be solved in high-efficiency stable operation of the oil and gas field. At present, the main modes for improving the wear-resistant and corrosion-resistant performance of the plunger rod are an electroplated chromium coating (CN 209067455U), a sprayed nickel-based coating (CN 102211194A, CN 201288658Y), a laser cladding alloy coating (CN 104862697B), an optimized structural design (CN 220319800U) and the like, however, the modes still have obvious defects such as environmental pollution of the electroplated chromium coating, poor wear resistance, high porosity of the sprayed nickel-based coating, high stress, easy corrosion and abrasion, high surface roughness of the laser cladding alloy coating, high wear rate and the like, so that the wear-resistant and corrosion-resistant performance of the plunger rod is still limited, and the production efficiency and the use safety of an oil-gas field are influenced. Disclosure of Invention The invention aims to solve the problem that in the prior art, a plunger rod works in an underground solid-liquid-gas three-phase medium environment of an oil-gas field to have serious abrasion resistance and corrosion resistance, and provides an abrasion-resistant and corrosion-resistant material, a preparation method thereof, an abrasion-resistant and corrosion-resistant plunger rod, a preparation method thereof and application thereof. In order to achieve the aim, the invention provides a wear-resistant and corrosion-resistant material, the surface of which comprises a wear-resistant and corrosion-resistant coating, wherein the wear-resistant and corrosion-resistant coating sequentially comprises a Si interface layer, a nano TiCN layer and a nano SiC layer from the inner interface of the coating to the outer surface of the coating. The second aspect of the invention provides a wear-resistant and corrosion-resistant plunger rod, which comprises a plunger rod matrix and a wear-resistant and corrosion-resistant coating formed on the surface of the plunger rod matrix, wherein the wear-resistant and corrosion-resistant coating is the wear-resistant and corrosion-resistant coating. The third aspect of the invention provides a preparation method of a wear-resistant and corrosion-resistant material, which comprises the step of sequentially forming a Si interface layer, a nano TiCN layer and a nano SiC layer on the surface of a substrate. The fourth aspect of the invention provides the wear-resistant and corrosion-resistant material prepared by the preparation method. The fifth aspect of the invention provides a method for preparing a wear-resistant and corrosion-resistant plunger rod, which is carried out according to the method for preparing the wear-resistant and corrosion-resistant material. The sixth aspect of the invention provides the wear-resistant and corrosion-resistant plunger rod prepared by the preparation method. The seventh aspect of the invention provides the use of the abrasion-resistant and corrosion-resistant plunger rod of the invention in the field of plunger pumps. According to the invention, the silicon interface layer on the surface of the matrix can improve the hardness and strength of the plunger rod matrix, relieve the mismatch of the thermal expansion coefficients between the nano TiCN layer and the matrix, and enhance the film-matrix bonding strength while reducing the interface stress. The nano TiCN layer is composed of nano TiCN crystal grains, so that the nano TiCN crystal grains can form strong interface combination with a silicon interface layer on the surface of the substrate, and the combination force of the nano TiCN layer and the silicon interface layer and the blocking capability of the nano TiCN layer on corrosive media are improved. The nano