Proportional cooling control method used for differential temperature heating technology heat treatment furnace

Abstract

The invention belongs to the technical field of heat treatment, and particularly relates to a proportional cooling control method used for a differential temperature heating technology heat treatment furnace. At present, an excessively-small slope of slope cooling is prone to metal overtemperature, and the production cycle can be prolonged due to an excessively-large slope; and the production period of jump cooling is long. According to the proportional cooling control method used for the differential temperature heating technology heat treatment furnace, the metal temperature participates in furnace gas temperature control, and the metal temperature and an original PID temperature control algorithm of a control system are combined, so that the production period is greatly shortened, and meanwhile, the risk of metal overtemperature is avoided; and an effect of automatically controlling a differential temperature cooling process is achieved, the production period is shortened, and the purpose of reducing the risk of metal overtemperature is achieved.

Description

technical field [0001] The method belongs to the technical field of heat treatment, and specifically relates to a proportional cooling control method for a heat treatment furnace in a differential temperature heating process, and is used for automatic temperature control of products and furnace gas when heating or heat treatment equipment executes a differential temperature heating process. Background technique [0002] When the product is heated or heat treated, depending on the material of the product, the required heating or heat treatment process is also different. In terms of the relationship between the temperature of the furnace gas and the product (eg: metal), it can be roughly divided into "isothermal heating" and " Differential temperature heating" two categories. isothermal heating ( figure 1 ): During the heating process, (set the furnace gas temperature to be equal to the metal target temperature), keep the furnace gas warm until the metal temperature reaches t...

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Problems solved by technology

At present, the control form of furnace gas cooling has slope cooling ( figure 2 ) and jump cooling ( image 3 ), the slope cooling can shorten the production cycle, but there is a high risk of metal overheating. Since the furnace gas temperature is higher than the target temperature of the metal, there is a risk of metal overheating. The cooling slope is not easy to determine, and the slope is too small to easily overheat the metal. , the slope is too large and the production cycle will be extended, which is not conducive to improving production efficiency; jump cooling can effectively reduce the risk of metal overheating, but the production cycle will be extended

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