This paper reports the problems of hydrogen wear decrease in steel parts operating in hydrogen medium. The friction couples of particular machine parts subjected to hydrogen wear are shown. Steel grades of the samples analyzed and their hardness are pointed out. The technologies of high- vacuum annealing and ion implantation used in investigations are de-scribed. The modes for the carrying out of high-vacuum annealing and ion implantation of silicon into a surface of the samples investigated are presented. It is determined that in a surface layer after the carrying out of high-vacuum annealing and ion implantation appear new structures with their form similar to roundish spots. The dimensions of spots and their distribution according to depth are defined. The sample breaking tests are carried out. It is established that technological operations carried out affect only the surface layers of samples. The investigation results can be used at the analysis of methods for hydrogen wear decrease of parts operating in hydrogen medium.
high-vacuum annealing, ion implantation, phase change, surface strengthening.
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