COMPLEX FOR CARRYING OUT NORMALIZATION OF LARGE CAR CASTINGS AND HARDENING WITH SUBSEQUENT TEMPERING OF MEDIUM CAR CASTINGS Russian patent published in 2023 - IPC F27B19/04 F27B9/14 F27B9/26 F27D3/06 F27D3/12 F27D5/00 

FIELD: metallurgy.

SUBSTANCE: invention is related to heat treatment of large and medium-sized car castings made from hypoeutectoid low-carbon low-alloy steels to obtain the necessary microstructure, which makes it possible to obtain high and stable mechanical properties. The complex for carrying out normalization of large car castings and hardening followed by tempering of medium car castings contains a furnace with a heating chamber, a normalization chamber and a transport system with a movement mechanism, a fork manipulator and a hardening tank located between the heating chamber and the normalization chamber. The transport system contains trolleys and consists of rail tracks for moving the trolleys, which are a lined metal structure installed on rollers with a set of heat-resistant equipment, consisting of heat-resistant transverse beams and heat-resistant longitudinal beams, while the transverse heat-resistant beams are designed to hold cages with an average car casting, and longitudinal heat-resistant beams are designed to hold cages with large car castings, a loading device designed to push cars with a cage from the loading position through the working space of the heating chamber, transport devices designed to unload cars with a cage from the heating chamber or normalization chamber, turning circles and two additional turning circles intended for transfer of trolleys to the side track.

EFFECT: increase of productivity per unit of production and reduction of the duration of operations.

6 cl, 1 ex, 5 dwg