EFFECT OF THE CHEMICAL COMPOSITION OF THE WELD METAL OF WELDED JOINTS MADE WITH CELLULOSE ELECTRODES ON THEIR MICROSTRUCTURE AND PROPERTIES.

A study was made of the effect of the most typical alloying systems of the cellulose electrodes on the microstructure and properties of individual layers of the weld metal. The most favorable microstructure and mechanical properties of the weld metal were obtained in welding with the cellulose electrodes with the Mn-Mo-Ni alloying system. The deposition of the second layer (hot pass) greatly modifies the microstructure of the root layer in the case of the ternary alloying systems, and to a lesser degree in welding with the unalloyed electrodes and the Mn-Mo electrodes.