METHOD OF ELECTRON-BEAM WELDING OF DISSIMILAR FERRO- AND PARAMAGNETIC MATERIALS Russian patent published in 2017 - IPC B23K15/10 B23K33/00 B23K103/18 

FIELD: electricity.

SUBSTANCE: method comprises forming an austenitic seam structure by displacing the electron beam relative to the joint of the welded parts while ensuring a given penetration rate of the edges. The displacement of the electron beam is made periodically alternately across the joint with the amplitudes A₂ and A₁. The value of the beam axis displacement on the paramagnetic material A₁ is chosen up to r, where r is half the width of the seam when welding with a static beam. The value of the displacement on the ferromagnetic material A₂ is determined by the design formula, depending on the penetration degree of the edges of the paramagnetic material, equivalent chromium content in the paramagnetic and ferromagnetic materials, equivalent nickel content in the paramagnetic and ferromagnetic materials, respectively. The duration of the beam stay on the paramagnetic and ferromagnetic materials is determined by the design formula, depending on the period of the alternating beam displacement, which is substantially shorter than the transition time to the steady-state heat conduction process in the weld pool, the frequency of the alternating beam displacement and the specific heat and thermal conductivity of the paramagnetic and ferromagnetic materials, respectively.

EFFECT: improved accuracy of the penetration degree of the welded edges.

2 dwg