Features：

- The pit tempering furnace is an energy-saving cycle-type tempering furnace for hoisting in the air of long-axis, connecting rods, rigging and other suspended heating type workpieces and general metal parts, and also suitable for aluminum alloy die-casting parts, pistons, Light alloy parts such as aluminum plates are used for quenching, annealing and aging heat treatment.

- The pit tempering furnace structure has a cylindrical furnace body made of steel plate and steel. The inner surface of the furnace cover is made of stainless steel. The furnace lining is made of ultra-lightweight and energy-saving microporous refractory insulation brick. The lining and the furnace shell are sandwiched with aluminum silicate fiber cotton to keep warm, and the gap is filled with expansion and heat preservation powder. The electric resistance wire is spirally mounted on the wire brick of the furnace by a 0Cr25Al5 high resistance alloy wire. A stainless steel loading basket is placed inside the hearth. The furnace cover is lifted by a manual mast. In order to uniformly heat the workpiece, a hot air circulation fan made of a heat-resistant stainless steel shaft and a fan blade is installed on the furnace cover, and during the heating process, the hot air is circulated up and down in the tempering furnace to ensure uniform heating of the workpiece. In order to ensure safe operation, a limit switch is installed near the lifting mechanism. This switch is interlocked with the power supply of the tempering furnace control cabinet, and the power is turned on when the furnace cover is closed (working). When the furnace cover is opened, the limit switch cuts off the control power supply, so the power supply of the heating element is cut off at the same time to ensure safe operation. The pit tempering furnace is equipped with automatic temperature control cabinet and thermocouple.

The characteristics of pit tempering furnace:

1. The furnace cover is equipped with a special air circulation fan, which has strong wind pressure, large wind flow and good air tightness.

2. The furnace temperature uniformity in the pit tempering furnace can meet the AMS2750D American aviation standard. Up to ±3 ° C, temperature control accuracy of 10 ° C.

3. The furnace lining adopts 230kg/m3 high-density aluminum silicate fiber hair quick structure, and the energy saving effect is remarkable.

4. The furnace cover and the furnace mouth are double-sealed with soft and soft seals and sand knife sockets. Manual levers or electro-hydraulic and worm mechanical lifting are adopted according to the weight of the furnace cover to reduce labor.

5. A more stable and reliable tempering furnace can be designed according to the shape, size and stacking density of the workpiece. To save on the cost and improve the pass rate.

Technical Parameters：