Increasing of efficiency of manual arc welding and surfacing of engineering products https://doi.org/10.33108/visnyk_tntu2018.03.046
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Abstract
The data on the exothermic mixture amount in the electrodes coating influence on their heating and melting are given. Experimental methods found that exothermic reactions in the stage of heating and melting take place at the electrode coating contained more than 35% of the exothermic mixture. It is proved that when there is 58% of the iron scale in the electrodes coating as compared to electrodes containing the same amount of iron powder, the electrode melting rate is increased by 18 – 20%, the coating melting mass speed
– 31 – 34% and the electrode melting coefficient – 11 – 14%. It is proved that the exothermic mixture adding (up to 53,4%) into the electrodes coating leads to effective efficiency heating increasing: basic metal (ηb.m.) from 0,715
to 0,815 and an electrode (ηe) from 0,28 to 0,415. The obtained results can be used in the welding electrodes performance improving development.
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