РАЗРАБОТКА МЕТОДА ЭЛЕКТРОРАЗРЯДНОЙ ПЕРМАНЕНТНОЙ МАРКИРОВКИ ДЕТАЛЕЙ МАШИН (Часть II. Экспериментальные исследования пятен упрочнения в элементах марок)

The results of research of changes of surface’s properties of metallic pipes of oil assortment as a result of electrodischarge treatment in a liquid environment are represented. The changes take place in the spot of contact of plasma of digit and is fixed in the depth of material on 100300 mkm. The spot has contrasting scopes, that allows easily to distinguish him on the surface of the marked good, however and creates preconditions to diminishment of corrosive firmness and tireless durability.