Method and device for rapid high-temperature heating of plates

Abstract

Disclosed are a method and a device of rapid high-temperature heating of plates. The method includes: filling a cement heating chamber with inert gas, starting an induction heating power supply to heat an inner graphite chamber to a certain degree, putting a metal sample plate in a gap of the inner graphite chamber, heating the metal sample plate to the set temperature, keeping the plate at the temperature, using a thermocouple to monitor the temperature of graphite in the heating chamber in real time during heating, and using a thermostat to control heating power of an induction coil. By means of closed-loop control with feedback, stable and controllable heating is guaranteed. In addition, water is filled into hollow copper tubes during heating to cool the induction coil, so that the coil is protected from damage by high heat. By the method and the device, the plates are heated evenly and successfully, the plates are quickly heated to the ultrahigh temperature up to 950 DEG C, and the samples are protected from over-oxidation. The device is compact in structure, easy and convenient in manufacture, small in occupied space, energy-saving, environment-friendly, fast in heating temperature control, and stable and reliable in operation.

Description

technical field [0001] The invention relates to a method and a device capable of rapid high-temperature heating of a plate, in particular to a method and a device for heating a steel high-temperature forming limit test sample for hot stamping. Background technique [0002] Hot stamping is a new forming technology developed in the past 20 years. Its technological feature is to heat the Boron steel plate with an original strength of about 400-600Mpa to the austenitic temperature range, move it to the mold quickly and stamp it quickly, and keep it in the press. In the pressed state, the parts are rapidly cooled through the mold to achieve quenching and strengthening, and a martensitic structure and a tensile strength of about 1500Mpa or even higher are obtained. The use of hot stamping parts in the body structure can greatly improve the collision safety of the body, reduce the weight of the body, and meet the requirements of the automotive industry for safety, energy saving, en...

AI Technical Summary

Problems solved by technology

The heating furnace takes up a lot of space and the temperature rises slowly. After the furnace door is opened to take the sample, the furnace temperature drops rapidly, which cannot guarantee the rapid temperature rise of the sample; the resistance heating speed is fast, but the two ends of the sample need conductive clamps. It is convenient to take out the sample, and the temperature of the whole sample is not uniform, forming a temperature gradient that is high in the middle and low at both ends; induction heating has a better heating effect on round rod-shaped materials, and for metal plates with a thickness of less than 5mm, due to its large surface area, it can When exposed to air heating, the heat dissipation is fast, it cannot reach a high temperature above 900°C, and it is easily oxidized. In addition, due to the skin effect of induction heating, the induction heating of the plate often results in uneven temperature of the plate due to the uneven distribution of the induced current , or even local melting of the plate

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