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Information × Registration Number 0216U002672, 0115U001622 , R & D reports Title Technology of repair of automatic submerged arc welding with high frequency vibrations of the electrode the worn surfaces parts of ship shafts popup.stage_title Head Dragan Stanislav Vladimirovich, Registration Date 13-06-2016 Organization National university of shipbuilding of admiral Makarov popup.description2 The process of automatic welding under flux with high-frequency vibrations of the electrode that allow you to control the geometry of the deposited layer by changing the direction of the electrode end of the oscillations under the action of pulsed movements created by a generator which is placed on a standard welding equipment. Theoretical and methodological basis of the study are the work of domestic and foreign scientists in the field of arc control and its properties in arc surfacing. Experimental studies were carried out on a specially designed bench, consisting of a power inverter power supply, welding tractor and developed high-frequency pulse generator electrode displacement. Chemical analysis of the weld metal was carried out using a scanning electron microscope - microprobe REMMA - 102-02. Measurements of the ground and weld metal hardness was performed using TA-10 hardness, micro- and macrostructure of metal was tested for NEOFOT-22 optical microscope. Effect of fluctuations on the stability of the process of welding and metal transfer was evaluated by statistically processed waveforms of current and voltage, obtained using an electronic USB-oscilloscope. Measurements of the geometric parameters of the weld bead, the study of the structure and hardness of the weld metal was carried out at the micro and Macrosection, determination coefficient surfacing carried out according to conventional techniques. Using high-frequency oscillations in the automatic submerged arc surfacing important in the manufacture of new and repair of existing metal products, machinery, equipment, and allows you to: Expand the technological capabilities of the method for managing the geometry (narrow or wide, high or low roll), area deposition and penetration (the interest) without stopping the process of surfacing and at constant parameters of the mode (current, arc voltage, deposition rate); Reduce the number of passes to achieve the desired properties of the deposited layer and / or save welding materials (wires, flux) by reducing the share of the parent metal in the weld from 40 %; Reduce the total duration of the technological process by increasing the deposition rate and the thickness of the deposited layer in one pass due to higher deposition rate by an average of 20%; Product Description popup.authors В.Д. Неделев И.В. Симутенков popup.nrat_date 2020-04-02 Close