| 摘要 |
FIELD: machine building. ^ SUBSTANCE: surface of back side of edge is heated with electric arc of reverse polarity by means of carbon electrode and successively cooled. Also, the electrode is transferred along a curvilinear trajectory formed with linear transfer along a sharp edge and with a rotation around vertical axis. Angular speed of electrode rotation is determined from the ratio: 3 V/R < w < 9 V/R, where w is angular rate of electrode rotation, rad/s; V is velocity of linear transfer, m/s, R is radius of electrode rotation, m. Arcing is carried out under a pulse mode. Duration and amplitude of current pulses per one revolution of the electrode is increased at moving away from the sharp edge and is decreased at approach to it. ^ EFFECT: obtaining strengthened layer with alternate cross section facilitating edge self-sharpening. ^ 8 dwg |
