Large vacuum annealing furnace

Abstract

The invention discloses a large vacuum annealing furnace which is composed of a furnace body, a heating device, a feeding system, a vacuum system, a cooling system and an electric control system, wherein the heating device is arranged in a furnace pipe; the feeding mechanism comprises a feeding trolley, a trailer wagon, a rack and a guide rail along which the rack moves back and forth; the feeding trolley moves back and forth along a steel rail laid in front of a furnace door under the action of a travelling mechanism; the rack travels on the guide rail by a roller row which is composed of a plurality of parallel rollers, and each roller is connected with a roller row frame by a shaft; the vacuum system is used for maintaining the vacuum degree of each annealing stage in the furnace body; the cooling system at least comprises a cooling water system for cooling each group of heaters; the heating device is composed of a plurality of heaters which are mutually and movably connected, and the heaters are installed in the furnace pipe in order; multiple layers of heat shields are arranged between each group of heaters and the inner wall of the furnace pipe; and the a guide rail along which a feeding rack moves back and forth is provided with a group of dismountable sectioned racks which are movably connected.

Description

technical field [0001] The invention belongs to heat treatment equipment, in particular to a large-scale vacuum annealing furnace for rare metals such as titanium and zirconium. Background technique [0002] Annealing is a process of heating metal materials or workpieces to a certain temperature according to the process requirements, keeping them warm for a period of time, and then cooling according to an appropriate speed to change the metal structure and properties (change the grain structure, refine the structure, eliminate stress and soften the material). A metal heat treatment process. The purpose is to soften metal materials or workpieces that have been cast, forged, welded or cut, improve plasticity and toughness, homogenize their chemical composition, remove internal residual stress, give full play to the potential of metal materials, meet user requirements, and extend metal materials. service life. [0003] Vacuum annealing is the only process used in domestic and...

AI Technical Summary

Problems solved by technology

[0009] 2. The feeding mechanism is mostly an integral material rack, which is prone to large deformation when heated, which makes it difficult to drive in and out of the furnace body and does not meet the ideal material level requirements when feeding

And it cannot adapt to the feeding of irregular-shaped raw materials, stacking them together, resulting in uneven heating of raw materials, which cannot fully meet the process requirements, which greatly affects the efficiency and quality of annealing production

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