Anti-abrasion protective coating for surface of metal substrate and preparation method and application of anti-abrasion protective coating

A technology for metal substrates and protective coatings, applied in metal material coating processes, coatings, ion implantation plating, etc., can solve the problems of reducing the mechanical properties of parts, increasing manufacturing costs, and large coating thicknesses, achieving improved Effects of mechanical strength, improved corrosion resistance, high corrosion and abrasion resistance

Active Publication Date: 2019-11-12
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the above-mentioned surface coating can significantly improve the anti-corrosion and wear-resisting performance of seawater pump parts, the preparation process often experiences high temperature, which easily reduces the mechanical properties of the parts. At the same time, the prepared coating is thick and has a rough surface, which requires high assembly precision. Parts with small matching clearance need to reserve processing amount or carry out post-polishing, which greatly increases the manufacturing cost

Method used

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  • Anti-abrasion protective coating for surface of metal substrate and preparation method and application of anti-abrasion protective coating
  • Anti-abrasion protective coating for surface of metal substrate and preparation method and application of anti-abrasion protective coating
  • Anti-abrasion protective coating for surface of metal substrate and preparation method and application of anti-abrasion protective coating

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Experimental program
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preparation example Construction

[0040] In some more specific embodiments, the preparation method includes:

[0041] (1) Pre-treat the surface of the substrate: use 120#~3000# SiC metallographic sandpaper to polish the metal substrate in turn, and then use Al with a particle size of 0.2~0.3μm 2 o 3 The abrasive paste is used to polish the metal substrate for 10-15 minutes;

[0042] Clean the polished metal substrate sequentially with acetone, ethanol, and deionized water for 5 to 15 minutes, and dry it with cold air;

[0043] Place the metal substrate in the thin film deposition vacuum chamber and evacuate to 2.0×10 -5 Torr, then heat the chamber at 120-150°C, then feed argon gas with a gas flow rate of 30-36 sccm into the vacuum chamber, turn on the linear ion source and pulse bias voltage to perform bias etching and cleaning on the substrate for 30-45 minutes, wherein The linear ion source current and pulse bias voltage are 0.20~0.25A and -200~-250V respectively.

[0044] (2) Using DC magnetron sputteri...

Embodiment 1

[0054] In this embodiment, the base material is AISI 316L austenitic stainless steel, and the structure of the coating is as follows figure 1 Shown, where the total thickness of the coating is 1.6 μm.

[0055] The coating preparation steps on the above-mentioned 316L surface are as follows:

[0056] Step 1: Use 120#~3000# SiC metallographic sandpaper to polish the 316L substrate in turn, and then use Al with a particle size of 0.2~0.3μm 2 o 3 The abrasive paste is used for metallographic polishing of the stainless steel substrate for 15 minutes;

[0057] Step 2: Place the polished 316L stainless steel substrate in acetone, ethanol and deionized water in sequence for ultrasonic cleaning for 10 minutes, and then dry it with cold air for later use;

[0058] Step 3: Place the 316L stainless steel substrate in the film deposition vacuum chamber, and successively use a mechanical pump and a turbomolecular pump to evacuate to 2.0×10 -5 After Torr, turn on the heater and set the h...

Embodiment 2

[0066] In this example, the base material is UNS S32750 (SAF 2507) super duplex stainless steel, and the coating is TiC x / Ti / TiC x Layers and DLC layers are periodically stacked alternately in a multilayer structure, in which the surface of S32750 is a Ti transition layer, and the total thickness of the coating is 2.3 μm.

[0067] The coating preparation steps on the surface of the above S32750 are as follows:

[0068] Step 1: Use 120#~3000# SiC metallographic sandpaper to polish the S32750 substrate in turn, and then use Al with a particle size of 0.2~0.3μm 2 o 3 The abrasive paste is used for metallographic polishing of the substrate for 12 minutes;

[0069] Step 2: Place the polished S32750 substrate in acetone, ethanol and deionized water in sequence for ultrasonic cleaning for 10 minutes, and then dry it with cold air for later use;

[0070] Step 3: Place the S32750 substrate in the thin film deposition vacuum chamber, and successively use mechanical pump and turbomo...

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Abstract

The invention discloses an anti-abrasion protective coating for the surface of a metal substrate and a preparation method and application of the anti-abrasion protective coating. The anti-abrasion protective coating comprises a Ti transition layer, a TiCx gradient layer, a first DLC layer, a TiCx / Ti / TiCx / DLC alternating layer stacking layer and a top layer which are sequentially formed on the surface of the metal substrate by adopting a linear ion source compound direct-current magnetron sputtering technology; the TiCx / Ti / TiCx / DLC alternating layer stacking layer is formed by alternately stacking a TiCx / Ti / TiCx sandwiched layer and a second DLC layer alternating layer; the TiCx / Ti / TiCx sandwiched layer comprises two TiCx layers and a Ti layer arranged between the two TiCx layers; the top layer comprises a third DLC layer; and the value range of the TiCx is 0.8-1.3. The anti- abrasion protective coating is of a structure of alternative multilayer, interfacial gradient and top layer extending and spreading, so that the coating has high comprehensive mechanical property and high corrosion resistance and abrasion resistance. The anti- abrasion protective coating can still maintain a good antifriction lubricating effect in a certain time after being worn out, and shows high abrasion failure tolerance.

Description

technical field [0001] The invention belongs to the technical field of surface treatment of mechanical parts, in particular relates to an anti-abrasion protective coating on the surface of a metal substrate and its preparation method and application, in particular to a seawater pump impeller and friction pair parts with long service life and high damage tolerance on the surface Erosion resistant protective coating and its preparation method and application. Background technique [0002] my country's exploration, development and utilization of marine resources are increasingly strengthened. As a new technology emerging to adapt to marine development, seawater hydraulic transmission technology with seawater as the working fluid has been gradually applied to the sea due to its high safety, small compression coefficient, low use and maintenance costs, green and pollution-free, and many other advantages. Salvage and salvage, marine resources survey, offshore oil and gas exploita...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/35C23C14/16C23C14/06C23C14/18C23C14/32
CPCC23C14/0057C23C14/0084C23C14/0605C23C14/0635C23C14/165C23C14/185C23C14/32C23C14/35
Inventor 汪爱英刘林林孙丽丽郭鹏李昊
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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