What is the quenching temperature range of the furrë karrocë

What is the quenching temperature range of the bogie hearth furnace? Generally, the quenching temperature range is narrower from 20 to 35°C.

1. The rolling bearing steel after spheroidization and annealing has good cutting performance, which is very important for mass production of rolling bearings on an automatic assembly line;

2. After spheroidizing rolling bearing steel, the trolley furnace has high contact fatigue strength, wear resistance and toughness after quenching and low temperature tempering;

3. For rolling bearing steel without spheroidization, the quenching temperature range is narrow (20~35℃), but after spheroidization, the quenching temperature range is expanded to 40~45℃, and the tendency of overheating and deformation and cracking during quenching is reduced. . Rolling bearing steel spheroidizing annealing process points Rolling bearing steel can adopt slow cooling spheroidizing or warm spheroidizing method.

It is generally believed that the average diameter of spherical carbides after annealing is 0.4 to 0.5 μm. When the area ratio of spherical carbides in the quenched structure of the trolley furnace is 7 to 8%, the life of the rolling bearing.

After spheroidizing annealing, when the area ratio of spherical carbides is about 15%, in order to make 7-8% of spherical carbides remain after quenching in the muffle furnace, the size of spherical carbides after annealing must be strictly controlled to make It is in the range of 0.4~0.5μm. For this reason, a stable and reliable continuous furnace should be used for spheroidizing annealing.