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A kind of corrosion-resistant bearing steel and its ion implantation surface treatment method

An ion implantation and surface treatment technology, applied in ion implantation plating, vacuum evaporation plating, coating and other directions, can solve the problem of improving the surface corrosion resistance and difficult to meet the strict requirements of bearing steel, and achieve the reduction of Young's modulus. , The effect of improving corrosion resistance and brittleness

Active Publication Date: 2021-11-12
BEIHANG UNIV +1
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Problems solved by technology

However, the improvement of surface corrosion resistance by this method is still difficult to meet the harsh requirements of bearing steel working conditions, and it is necessary to further improve the surface corrosion resistance of bearing steel

Method used

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  • A kind of corrosion-resistant bearing steel and its ion implantation surface treatment method
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  • A kind of corrosion-resistant bearing steel and its ion implantation surface treatment method

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Embodiment Construction

[0024] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0025] The CSS-42L sample composition that the present embodiment adopts is

[0026]

[0027] Material preparation: Cut 10×10×5mm from hardened CSS-42L steel ingot 3 The sample was mechanically polished to 3000# with SiC emery paper, and then polished to a mirror surface with a diamond polishing agent with a particle size of 1.5 μm, cleaned and dried.

[0028] Cr film preparation and ion implantation: The samples were ultrasonically cleaned with acetone before the chromium film was prepared. The high-purity chromium target is used as the cathode. Before deposition, the surface cleaning and Cr ion implantation are carried out with the Cr ion beam drawn from the magnetic filter cathode arc vacuum system. The implantation conditions are: 8kV voltage, 4mA beam current, and charge injection The amount is ...

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Abstract

The invention relates to a corrosion-resistant bearing steel. A chromium film is deposited on the surface of the bearing steel substrate, and 10-15 at% Ti and 30-60 at% C are distributed on the chromium film. The ion implantation surface treatment method for preparing this kind of corrosion-resistant bearing steel includes the following steps: (a, depositing a chromium film on the bearing steel substrate; (b, implanting titanium ions and carbon ions on the surface of the substrate by ion implantation. Chromium The film makes the surface of the bearing steel substrate have good hardness, toughness, wear resistance and corrosion resistance. On this basis, ion implantation will react on the surface of the chromium film to form an amorphous layer and a ceramic phase, resulting in many dislocation defects. Promote the enrichment of passivation element chromium on the surface, improve the stability of the passivation film, and improve the corrosion resistance of the film. Therefore, the bearing steel prepared by this surface treatment method has good corrosion resistance and mechanical properties at the same time.

Description

technical field [0001] The invention relates to the field of stainless steel surface treatment, in particular to a corrosion-resistant bearing steel and an ion implantation surface treatment method thereof. Background technique [0002] The main shaft bearing is one of the most critical components of an aero-engine. It works under severe conditions such as high speed, high load, high temperature, and high DN value. Its life and reliability directly affect the life and reliability of the engine. Once a failure occurs , will bring catastrophic consequences to high-speed engines and aircraft flying at high altitudes. my country's aero-engine spindle bearing manufacturing technology started relatively late. Although great progress has been made, there is still a big gap compared with the aviation bearing powerhouses such as Europe and the United States. The statistics of the outdoor use of the engine also confirm that the mechanism of most bearing failure modes is related to th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/32C23C14/16C23C14/48
CPCC23C14/16C23C14/325C23C14/48
Inventor 王方方张虎郑立静
Owner BEIHANG UNIV
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