The invention relates to a continuous heat treatment
production line and a heat treatment method thereof. The continuous heat treatment
production line comprises a feeding table, a medium temperaturenormalizing furnace, a quick cooling table, a low temperature
tempering furnace and a discharging table; a medium temperature feeding furnace door is arranged at the feeding end of the medium temperature normalizing furnace, a medium temperature discharging furnace door is arranged at the discharging end of the medium temperature normalizing furnace, the quick cooling table is arranged on one sideof the discharging end of the medium temperature normalizing furnace in a matched mode, the low temperature
tempering furnace is arranged on one side of the discharging end of the quick cooling tablein a matched mode, a low temperature feeding furnace door is arranged at the feeding end of the low temperature
tempering furnace, and a low temperature discharging furnace door is arranged at the discharging end of the low temperature tempering furnace; and the discharging table is arranged on one side of the low temperature tempering furnace in a matched mode, and the feeding table, the mediumtemperature normalizing furnace, the quick cooling table, the low temperature tempering furnace and the discharging table are connected to one other through
material transfer roller ways to transportworkpieces. Normalizing heating and rapid and uniform cooling of
bainite alloy steel point rails are achieved, normalizing residual heat is used for entering the furnace for tempering, the
layout of the
production line is compact and reasonable, automatic furnace installing and discharging are achieved, and production efficiency and product quality are improved.