Steel plate quenching cooling method and device

Abstract

The invention provides a steel plate quenching cooling method and device. The method comprises the following steps of: placing a steel plate on a material rack above a quenching tank in a way of enabling the plate surface of the steel plate to be parallel to the liquid level, downwards rotating the material rack to a certain angle by taking one side of the material rack in the length direction as a rotating shaft under the drive of a driving device to partially immerse the steel plate into liquid, simultaneously injecting the liquid into the quenching tank to enable the liquid level of the liquid in the quenching tank to rise till the steel plate is completely immersed, and further realizing oblique quenching cooling of the steel plate. The steel plate quenching cooling device comprises a quenching steel plate oblique liquid immersion and liquid outlet system, a system for water injection from an outer tank body into an inner tank body and a rapid water drainage system. According to the method and the device, disclosed by the invention, the steel plate can be immersed into the liquid with a certain inclination angle quickly and conveniently, the problem of great difference of cooling intensity between the upper plate surface and the lower plate surface caused by incapability of smoothly exhausting a large quantity of steam film on the lower surface of the steel plate after the steel plate is horizontally placed and immersed into the liquid can be solved, and the time difference between one side which is firstly immersed into the liquid and the side which is later immersed into the liquid when the steel plate is immersed into the liquid in a vertical way can be simultaneously reduced.

Description

technical field

[0001] The invention relates to the field of heat treatment quenching and cooling, in particular to a steel plate quenching and cooling method and corresponding equipment. Background technique

[0002] Heat treatment refers to the process of cooling the steel in the austenitic state at an appropriate speed to obtain the expected structure and properties. In addition to the changes in the structure and properties of steel during quenching and cooling, it is also accompanied by cracking and distortion. If the steel is cracked during quenching, it will be scrapped. Quenching cracking can be avoided through appropriate processes and quenching methods; quenching distortion refers to the change of the original size or shape of the workpiece during quenching and cooling, no matter what measures are taken (change heating Quenching distortion cannot be avoided due to the cooling process, clamping method, quenching medium type, and quenching method, but the difference...

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