DEVELOPMENT OF TITANIUM-THERMITE MIXTURE FOR WELDING

Abstract

The influence of reducing metals on the metallurgical processes of thermite welding has been studied. Iron scale and powdery materials were used as starting materials for the metallothermic mixture: titanium powder PTS according to TU 15‒1958, aluminum powder PA-2 according to GOST 6058‒73. Aluminum gas purification dust was introduced into the composition of the metallothermic mixture. The chemical composition of the metal was determined by the atomic emission method using the DFS-71 spectrometer according to GOST RISO 14284‒2009, the slag composition was determined by the X-ray fluorescence method on the Shimadzu XRF-1800 spectrometer according to GOST 28033‒89. The composition of the titanothermite mixture has been developed, which ensures the production of dense metal. The addition of a small amount of aluminum powder to the composition of the titanium-thermite mixture ensures the completeness of the interaction and reduction of iron scale, at the same time, the amount of molten metal increases. The introduction of aluminum gas purification dust into the thermite mixture as a flux reduces gas emission during thermal processes. In addition, the addition of a carbon-fluorine-containing flux additive increases the carbon content in the resulting metal and improves its mechanical properties.