The invention relates to a technique for induction-
quenching the axle journal and the end surfaces of a
flange-output axle simultaneously. The invention is characterized in that the technique comprises the following steps: placing parts to be quenched with end surfaces upward on a rotary base; pressing down a
start button to start rotating a workpiece, so that the
metal parts adjacent to active wires are heated for 5 seconds; stop heating when the parts are heated to a temperature 50 DEG C higher than the austenitizing temperature of the material; cooling by spraying cooling water; and then, finishing the
quenching process of the part by taking the part down from the rotary base when the cooling is finished. The technique ensures that hardening
layers can be distributed evenly, prevents the
quenching crack from generating, improves the
cooling capacity and uniformity during the cooling process in quenching and ensures that the
hardness of the quenched surface is even; the invention has the advantages of simple structure, short
process time, high production efficiency,
energy conservation and low process cost; the hardening
layers are continuously distributed from the axle journal to the end surfaces without
tempering soft zone, and evenly distributed except for the tip part; and the technique provides convenience for part
assembly and disassembly and technique adjustment, so that spraying and part disassembling can be finished at two positions.