A solid lubricating composite coating on the surface of a substrate and its preparation method

A composite coating, solid lubrication technology, applied in the direction of coating, metal material coating process, vacuum evaporation plating, etc., can solve the problem of difficult to meet the protection, high friction coefficient, achieve excellent self-lubricating characteristics, low shear Stress, the effect of reducing the coefficient of friction
CN106467959BActive Publication Date: 2019-09-13NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
6 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
Publication Date
2019-09-13

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a solid lubrication composite coating on the surface of a base body. The composite coating is composed of hard phase nanocrystalline CrC and a lubricating phase a-C, a CrC / a-C composite coating is formed, the characteristics that the CrC hard coating is high in hardness and low in abrasion are kept, and meanwhile the excellent self-lubricating property of the a-C material is achieved. The multi-arc ion plating technology is adopted, metal Cr serves as a target material, high-purity Ar serves as working gas, C2H2 serves as reaction gas, the CrC / a-C composite coating is deposited on the surface of the base body, and the content of the CrC phase and the a-C phase in the composite coating can be regulated and controlled by controlling the flow of the Cr target current and the reaction gas C2H2. The hardness of the composite coating reaches up to 31 GPa, the abrasion rate reaches the magnitude of 10<-16> m<3> / N.m, the friction coefficient in the atmospheric environment is lower than 0.2, the base body working in the high-abrasion and high-friction environment can be well protected, and very high application value is achieved.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The method belongs to the technical field of substrate surface treatment, and in particular relates to a solid lubricating composite coating on the substrate surface and a preparation method thereof. Background technique

[0002] Chromium carbide has excellent properties such as high hardness, high melting point, high elastic modulus, chemical corrosion resistance and wear resistance, and is a widely used metal carbide. Chromium carbides usually include orthorhombic Cr 3 C 2 (Pnma), Orthogonal Cr 7 C 3 (Pnma) and cubic Cr 23 C 6 (Fm-3m) Three stable crystal forms. Due to their excellent protective properties and a thermal expansion coefficient very close to steel, they are often used as surface coatings and play an important role in the fields of knives, moulds, blades, etc.

[0003] Common methods for depositing chromium carbide coatings on the substrate surface include thermal spraying, laser cladding, physical vapor deposition, chemical vapor...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More