Vertical vacuum quenching furnace

Abstract

The invention discloses a vertical vacuum quenching furnace and solves the problem of high workpiece quenching quality discrete index caused by long workpiece transfer time in a conventional vacuum quenching furnace. The vertical vacuum quenching furnace comprises a PLC (programmable logic controller) and a quenching water tank (10), wherein a heating chamber (24) is arranged at the top end of the quenching water tank; a heating chamber lower heat insulation door (26) is arranged between a bottom outlet of the heating chamber and a top inlet of the quenching water tank; an output shaft of a lifting air cylinder (29), extending downwards is connected with a mechanical paw (30); drawer material boxes (3) and materials to be quenched are arranged in multiple layers of horizontal drawer shelves; a left central supporting shaft (5) is arranged on a central shaft in the longitudinal direction of the left side surface of a cuboid-shaped material basket frame; a right central supporting shaft (4) is arranged on the central shaft in the longitudinal direction of the right side surface of the cuboid-shaped material basket frame; material basket turning support shafts are arranged on the rear sides of the central supporting shafts on the left side surface and the right side surface of the cuboid-shaped material basket frame. A material basket is especially suitable for the vertical vacuum quenching furnace.

Description

technical field [0001] The invention relates to a vertical vacuum quenching furnace, which is used for vacuum water quenching heat treatment of titanium alloy fasteners. Background technique [0002] The solid solution heating temperature of titanium alloy fasteners is 840-950°C, and the commonly used quenching cooling medium is clear water. In order to prevent the performance degradation caused by the precipitation of α phase, the quenching transfer time of titanium alloy fasteners should be rapid. Generally, when the wall thickness of the workpiece is less than 5mm, the workpiece transfer time is required to be less than 6s. At present, the titanium alloy continuous water quenching furnace commonly used abroad is mainly used for water quenching heat treatment of a single batch of large batches of titanium alloy fasteners. The number of workpieces processed at one time is huge, reaching 500kg / 24h; The firmware needs to adjust the heat treatment process once, and the consum...

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Problems solved by technology

[0003] The invention provides a vertical vacuum quenching furnace, which solves the technical problems of the existing vacuum vertical vacuum quenching furnace that the workpiece transfer time is >6s, and the material basket and the workpiece enter the water together, resulting in a large dispersion index of the quenching quality of titanium alloy fasteners.

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