Steel constant-temperature heat treatment cooling device

Abstract

The invention relates to a steel constant-temperature heat treatment cooling device which comprises a constant-temperature box filled with quenching oil. At least one quenching operation hole is formed in the top face of the constant-temperature box; a stainless steel mesh screen immersed in the quenching oil is fixedly installed at the position, corresponding to each quenching operation hole, inthe constant-temperature box; a rotating shaft rotating in the vertical direction is installed in the constant-temperature box; a plurality of rotating blades are fixedly arranged in the axial direction of the rotating shaft; a plurality of annular cooling water pipes which are communicated and connected are further arranged on the inner circumferential wall of the constant-temperature box; and each annular cooling water pipe is provided with a water inlet and a water outlet. According to the cooling device provided by the invention, heat is rapidly taken away by the flowing quenching oil, local high-temperature quenching oil steam cannot be formed, and the potential safety hazard of ignition and combustion of the quenching oil is eliminated; a quenching workpiece does not need a lifting hook, so that heavy physical labor spent on lifting hook making is avoided; and under the combined action of motor stirring and cooling water, the stable fluctuation of the whole quenching oil is controlled within 25 DEG C, and the influence of the temperature difference of the quenching oil on a heat treatment workpiece is eliminated.

Description

technical field [0001] The invention relates to the technical field of heat treatment of alloy structural steel, in particular to a cooling device for constant temperature heat treatment of steel. Background technique [0002] Alloy structural steel is a metal product commonly used in industrial production. Most of the alloy structural steel needs to be heat-treated before leaving the factory. In the process of heat treatment of alloy steel, most of the heat treatment needs to use quenching oil. The way is to place the quenching oil in the oil pool for quenching, which has the following defects: [0003] 1. Low safety: When the alloy structural steel is out of the furnace, the temperature reaches nearly 900°C. When the quenched workpiece is placed in the quenching oil, due to the poor thermal conductivity of the oil, the temperature of the quenching oil around the workpiece rises sharply, forming oil vapor. When the temperature exceeds When the oil flash point, the quenchin...

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Problems solved by technology

[0006] The invention provides a cooling device for constant temperature heat treatment of steel to solve the shortcomings of the existing heat treatment quenching device, such as large safety hazards, heavy workload, low efficiency, and unstable performance of workpieces after heat treatment.

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