FORMATION OF COATINGS DEPOSED IN EXTREME COOLING CONDITIONS

Abstract

Classical methods of surfacing of steel parts make it possible to quickly and efficiently restore the geometry and
dimensions of worn parts, but the problem of ensuring the necessary performance properties of the obtained coatings still
remains unresolved.
The most widespread are several ways to ensure the required performance properties of welded coatings. Some are
based on the use of expensive specialized surfacing materials, which allow to obtain coatings with specified properties. Others
consider the use of cheaper wires, but require additional thermochemical operations.
An effective method of creating coatings with specified properties, in particular hardness, by surfacing. The essence is
a combination of surfacing, intensive cooling due to partial immersion of the part in a water bath. The peculiarity is that
common materials are used for surfacing, and as a result, it is possible to obtain solid wear-resistant coatings. In addition,
additional hardness can be achieved by adding graphite powder to the coolant. During surfacing, carbon enters the welding
bath, increasing its content in the coating, and rapid cooling hardens it.