Mironova M. Electroarc surfacing process efficiency increase in the longitudinal magnetic field

The research object is arc surfacing under a flux technological process in the longitudinal magnetic field (LMF) with use of ferromagnetic electrode and basic materials. The purpose is arc surfacing under a flux technological process efficiency increase with managing LMF influence. Methods - experimental with the use of standard methods (oscillographic, metallographic and other). Mathematical and physical modeling of processes in a drop and welding bath liquid metal at arc surfacing with LMF, and also arc gasodynamic pressure distribution research by probes method; mathematical treatment with the use of the program Microsoft Excel. Novelty - grounded and experimentally confirmed, that a drop on the ferromagnetic electrode end is revolved under the action of electromagnetic force from interaction current density axial component in a drop with LMF induction radial component at arc surfacing with the use of LMF. The mathematical model of the drop behavior on the electrode end is developed, allowing to define the LMF optimum parameters, under which the drop removal and increase of wire melting coefficient will take place at arc surfacing; results -it is determined, that electrode melting productivity increase are observed at surfacing with the use of alternate LMF of frequency 50 Hz. The electrode melting coefficient in LMF depends on magnetic properties of electrode material, rising with material permeance increase. Parent metal penetration decrease at arc surfacing under a flux is explained not only a change in arc pressure distribution but also braking action of this field on the liquid metal streams in welding bath. Alternate LMF frequency about 2…5 Hz and induction about 60.100 mTl for effective stirring of welding bath liquid metal and increase of surfaced metal service features at arc surfacing with the use of electrodes and products from ferromagnetic materials is recommended. Degree of introduction - developed and inculcated on ZAO "Gidromash" technology of electroarc surfacing with the use of manager of LMF of abraid details of road-transport technique as bodies of rotation (rollers), that allows to increase the surfacing process productivity on 25 %, the economy of electric energy is 20-25 %.; an actual annual economic effect is 58199 UAh Sphere of the use is machine-building enterprises and repair-mechanical factories of Ukraine.