Iron-Based Sintered Antifriction Materials for Heavy-Duty Service

Property Evaluation of Nitrided Layers of Porous Sintered Iron

“…In view of the wide industrial application of porous materials, it is necessary to reinforce them by saturation with nitrogen, carbon and other elements. It is of interest to study the regularities of diffusion saturation of iron with nitrogen, taking into account the effect of the porosity of the material as a factor having a significant effect on the thermochemical treatment, And also in connection with the prospects of nitrogen as an element forming reinforcing phases in the diffusion layers [1] Powder metallurgy materials are also extensively used for the production of components, such as gears or cams, subjected to working conditions that give rise to sliding, rolling or abrasive wear. The use of powder metallurgy in these applications is often limited by the relative softness of these materials and their susceptibility to wear and galling.…”

Surface layer structure of AISI 1020 steel at different stages of dry sliding under electric current of high density

“…It is known that high wear resistance of material during friction is reached due to structural stability of its contact layer [1]. The structure of surface layer (SL) can be stabilized by superficial hardening, for example, owing to chemical heat treatment, ionic implantation, etc.…”

“…The heavy mode of friction can be set by means of electric current of high contact density. As a rule, current collection materials have the graphite containing composite structure where iron or copper [1] serves as a basis. Most of these composites show wear intensity higher, than cast AISI 1020 steel or copper under heavy conditions of dry friction with contact current density higher 100 A/cm 2 [6].…”