Steel part heat treatment method and heat treatment device

Abstract

The invention discloses a steel part heat treatment method. The method comprises the following steps: a steel part is put in heating space of a heat treatment device, and the heating space is closed; the temperature in the heating space is heated up to reach 190-210 DEG C, and is kept by 1-2 hours; the temperature in the heating space is heated up to reach 390-410 DEG C, meanwhile, gas in the heating space is urged to circularly flow to uniformly heat the steel part in the heating space, and the temperature is kept by 2-3 hours; and the heating space is opened, and the steel part is naturally cooled in air to finish heat treatment. The invention further discloses a heat treatment device; the heat treatment device comprises a furnace body, an electric heater and a fan; the furnace body includes a furnace shell and a furnace door; the furnace shell limits the heating space opened in at least one side; the furnace door is used for closing and opening the heating space; the electric heater is arranged in the heating space for heating the heating space; and the fan is used for driving the gas in the heating space to circularly flow. The heat treatment method can heat the steel part and eliminate the stress.

Description

technical field [0001] The invention relates to the technical field of heat treatment, in particular to a heat treatment method and a heat treatment device for eliminating the stress of steel parts. Background technique [0002] During the forging and / or punching process of steel parts, under the action of pressure, the internal structure will change and generate large stress. After the steel parts after forging and / or punching are processed by CNC, due to different machining allowances and large stresses, the steel parts are easily deformed, resulting in out-of-tolerance flatness, which often cannot meet the use tolerance requirements. Therefore, it is very necessary to heat-treat the steel parts before CNC machining the steel parts after forging and / or punching, so as to eliminate the stress generated by the steel parts due to forging and / or punching. [0003] At present, the commonly used heat treatment method for steel parts is to install heating pipes on the side wall ...

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Problems solved by technology

[0004] However, this method of heat treatment of steel parts is still insufficient, the reason is that in the process of heating and / or heat preservation, the gas in the heating space basically does not circulate, and the distance between each steel part and the heating pipe is different, so each time The heating degree of individual steel parts is also different, and the steel parts in the heating space are prone to uneven heating, and eventually some steel parts cannot be relieved of stress due to uneven heating.

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