摘要:
The method provides for AUSTENITIZING AT ABOUT 850* TO 900*C; steelhardening in a fluid flow directed through the rings in radial direction at about 1.000 m3 p.h. with a hardness scatter between 400 to 550 kp/mm2 and with induced oscillations of 3 mm amplitude at 25 cycles frequency; and TEMPERING TO A TENSILE STRENGTH OF ABOUT 85 KP/MM2 An apparatus for carrying out this method comprises a pivotable hook for receiving the rings; AT LEAST ONE OSCILLATING GENERATOR CONNECTED TO THE HOOKS; MEANS TO POSITION THE WINDING PLANE OF THE RINGS VERTICALLY WHEN THE HOOK IS IN OPERATION; MEANS TO SUBJECT THE RINGS TO A RADIAL FLOW INCLUDING A PIPE SYSTEM AND A COVER POSITIONED ON THE SIDE OF THE RING WHICH FACES AWAY FROM THE HOOK; A HORIZONTAL SUPPORT OF THE RING TO BE TREATED; AND SUPPORTING ELEMENTS WITH ROLLERS AND OSCILLATING GENERATORS CONNECTED WITH THE SUPPORTING ELEMENTS.