Abstract
The results of experiments on the modification of SUS 321 stainless steel by a nitrogen ion beam extracted from a gas plasma of the non-self-sustained arc discharge with hot cathode PINK are presented. Extraction and focusing of the beam was carried out through a grid electrode of the definite curvature. When negative electric pulsed bias is applied to the grid electrode and a specimen located under the same potential, a ballistically focused nitrogen ion beam is formed. As a result of the processing, a nitride layer is formed on the surface of stainless steel with an increased hardness compared to the initial one.
Highlights
Increasing the working properties of products made of SUS 321 structural stainless steel, which is widely used in industry, is an important scientific and technical task
A ballistic focusing system of the ion beam was at the center of the vacuum chamber at a distance of 180 mm from the end of the hollow cathode of the PINK generator
The specimens of 43×20×3 mm made of SUS 321 structural stainless steel were pre-wiped with bezine and placed on the collector of the ballistic focusing system, the temperature of which was measured with a chromel-alumel thermocouple
Summary
Increasing the working properties (hardness, wear resistance, etc.) of products made of SUS 321 structural stainless steel, which is widely used in industry, is an important scientific and technical task. This article presents the results of experiments on low-energy nitrogen ion implantation of SUS 321 stainless steel in the system with ballistic focusing of an ion beam formed from a non-self-sustained arc discharge plasma with a thermionic cathode. This work is a logical continuation of the experiments in the ballistic focusing system of a spherical configuration ion beam [8] with modernization of the electrode system into a cylindrical configuration, which allowed surface processing of a larger area.
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