Double-vortex quenching equipment

Abstract

The invention discloses double-vortex quenching equipment and relates to the technical field of heat treatment devices for spherical and spheroidic workpieces. The double-vortex quenching equipment comprises a quenching tank and a medium circulating system, wherein two cylindrical shell structures which are arranged in an intersecting mode are arranged on the top of the quenching tank, and the bottom of each cylindrical shell structure is connected with the large end of a circular-truncated-cone-shaped shell structure; each cylindrical shell structure is provided with an inlet tangent to the inner wall of the cylindrical shell structure, and the inlet communicates with the medium circulating system. After a medium enters the cylindrical shell structures, a vortex fluid is formed in each cylinder. Quenching heat treatment is conducted on a workpiece through a high-speed water flow at the intersection of the two vortexes, and the quenching medium makes contact with all positions of the surface of the workpiece without obstruction, so that dead-corner-free cooling is achieved. The flow field in the quenching tank is regular, a high-speed water flow flows stably, and meanwhile, the splashing problem of a quenching medium is solved. A large water tank is not needed, and the device is more suitable for use in limited places.

Description

technical field [0001] The invention relates to the technical field of heat treatment devices for spherical and quasi-spherical workpieces, in particular to twin-vortex quenching equipment. Background technique [0002] Quenching is a common and important method of strengthening steel materials. The purpose of quenching is to transform supercooled austenite into martensite or bainite to obtain martensite or bainite structure, so as to greatly improve the strength, hardness, wear resistance, etc. of the material, so as to meet the requirements of various mechanical parts. and tool requirements. [0003] The rapid cooling process of quenching is generally realized in a medium, and the commonly used medium is water, oil and salt substances. Different media have different cooling rates. According to the conventional theory, the greater the cooling rate, the higher the strength and hardness of the workpiece, but the greater the cracking tendency. If water is used as the quenc...

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Problems solved by technology

[0007] In the patent document with the publication number CN106011407A, it is mainly aimed at vacuum water cooling and heat treatment. During quenching, each batch of workpieces is placed in the hanging basket assembly, and the next batch can only be processed after the treatment is completed. It is processed in batches. During quenching, The workpiece is put into the hanging basket assembly, and the nozzle is sprayed with water. The place where the workpiece and the hanging basket are in contact with the water is not easy to spray, which will form a cooling dead angle and cause soft spots on the workpiece

[0008] The patent document with the notification number CN101693942A is a strong quenching system with strong stirring in the water tank. The cooling function is realized by stirring in the water tank. The flow field in the water tank is irregular, and there are dead angles for spherical workpieces. The stirring device must be placed in the quenching tank with a large water tank

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