Crosswind circulation internal heat type tunnel pure nitrogen protection annealing furnace

Abstract

The invention discloses a crosswind circulation internal heat type tunnel pure nitrogen protection annealing furnace comprising a transversely arranged stainless steel muffle tank. The outer side of a bottom opening of the stainless steel muffle tank is surrounded by a fan outer insulated wall to form a cavity. A fan left inner insulated wall and a fan right inner insulated wall are arranged in the cavity longitudinally and symmetrically. A left seal heating pipe and a right seal heating pipe are longitudinally installed below the fan left inner insulated wall and the fan right inner insulated wall correspondingly. A water cooling seal shaft is installed in the middle of the bottom of the fan outer insulated wall. A heat resistant centrifugal fan is arranged at the upper end of the water cooling seal shaft. The lower end of the water cooling seal shaft is connected with an outer motor. A left hot air outlet is formed between the fan left inner insulated wall and the inner wall of the fan outer insulated wall, and a right hot air outlet is formed between the fan right inner insulated wall and the inner wall of the fan outer insulated wall. In the crosswind circulation internal heat type tunnel pure nitrogen protection annealing furnace, a workpiece can be heated evenly, the inner and outer temperature difference of the workpiece is lowered, the annealing quality of the workpiece is improved, annealing treatment efficiency of a magnetic core element is improved, and equipment occupied space is small, and the application range is wide.

Description

technical field [0001] The invention relates to the field of heat treatment equipment, in particular to a cross-wind cycle internal heating tunnel pure nitrogen protection annealing furnace for improving the magnetic properties of soft magnetic core components. Background technique [0002] At present, the soft magnetic amorphous industry generally adopts annealing at 350-560 ° C under the application of a transverse permanent magnet high magnetic field to improve the magnetic properties of soft magnetic core components. Flat tunnel type pure nitrogen protection annealing furnace. However, the main disadvantage of the externally heated furnace type is that during the heating process, the temperature difference between the inside and outside of the heated workpiece is too large, especially when the material of the heated workpiece has crystallization and heat generation (such as amorphous materials), the temperature of the internal components of the workpiece Often the tempe...

AI Technical Summary

Problems solved by technology

However, the thermal inertia of this conventional external heating method is serious. The heating starts from the actuator heater, and it needs to pass through the stainless steel muffle tank and the air around the workpiece before it can be transmitted to the workpiece thermocouple. The thermal inertia time is long, and it is easy to produce super Moderate temperature control fluctuations, especially in the case of workpiece materials with crystallization and heat generation (such as amorphous materials), overheating and overtemperature often lead to workpiece scrapping

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