Special steel bar continuous tempering line includes 1 set of natural gas heating roller bottom continuous quenching furnace, quenching furnace temperature 800-1080 ℃, can realize the quenching water-cooled, air-cooled, air-cooled, fog air-cooled, its own preheating burner, low NOx, high efficiency and energy saving; 1 set of roller bottom electric heating continuous tempering furnace, radiant tube electric heating, tempering furnace temperature 500-810 ℃, can realize the tempering air-cooled, air-cooled, mist air-cooled; precision roller chain drive, walking speed, direction adjustable, steel can realize automatic loading and unloading, can produce product specifications: φ10-230mm, length 3-8m. The furnace can be air-cooled after tempering, air-cooled, mist air-cooled; precision roller chain drive, walking speed, direction adjustable, steel can be automated loading and unloading, can produce product specifications: φ10-230mm, length of 3-8 m. Furnace temperature uniformity ± 8 ℃, to meet the AMS2750G standard. The main production products include: automotive stainless steel, oil service stainless steel, blade steel, industrial mold steel, military steel and so on.