Development of coating for surface protection of parts during welding

Abstract

The purpose of the development is to create a heat-resistant coating to protect the surface from
the sticking of splashes of molten metal in the welding of low-carbon and low-alloy steels, which is
provided by changing the slag and gas system for protecting the metal surface by coating components.
To optimize the gas-slag coating system, titanium oxide is added to its composition
containing talc, potassium chromium, liquid glass and water.
The essential difference between the coatings is the use of titanium oxide as a filler in it,
which provides it with additional heat resistance and increases the stability of arc combustion.
As a result of melting of titanium oxide at the moment of falling onto the coating of the
liquid metal droplet, a slag is formed which covers the drop and the most delicate surface of the part
from the welding of the spray.
According to industry-known technology, coatings of various compositions were made, they were
applied by spraying onto plates in one layer and dried before welding. Welding of the T-wave samples was
carried out using a semiautomatic device in a carbon dioxide environment and manual arc welding of electrodes.
The results of tests of welding-technological properties of coatings showed its high efficiency.
The introduction of the coating will improve the quality of the production and reduce the
laboriousness of stripping the welds from splashes.