Direct resistance heating equipment applicable to heat treatment of slab metal specimen

Abstract

The invention provides direct resistance heating equipment applicable to heat treatment of a slab metal specimen. The direct resistance heating equipment applicable to heat treatment of the slab metal specimen comprises an insulation shell, a main body arranged inside the insulation shell and a control device, wherein the main body comprises a bottom plate, a fixed heating electrode fixed on the bottom plate, a sliding heating electrode, a sliding device fixed on the bottom plate and a tension device, wherein the sliding heating electrode is fixed on the sliding deice; the tension device is connected with the bottom of the sliding heating electrode; the control device comprises a transformer, a thermocouple, a data collection device, a computer control system, a gear selection module, a thyristor controller and a thyristor; the thermocouple, the data collection device, the computer control system, the gear selection module, the thyristor controller and the thyristor are sequentially connected; the thyristor is connected with a primary side of the transformer; and the secondary side of the transformer is respectively connected with the fixed heating electrode and the sliding heating electrode. The equipment supports a large specimen which is to be subjected to heat treatment, can effectively prevent deformation of a conductive specimen and has excellent temperature control accuracy, repeatability and heat preservation temperature accuracy and high in efficiency.

Description

technical field [0001] The invention belongs to the field of iron and steel production equipment, in particular to a direct resistance heating equipment suitable for heat treatment of strip-shaped metal samples. Background technique [0002] The temperature control of heat treatment experimental equipment in my country's iron and steel enterprises is not accurate, and generally only can be used for air cooling, furnace cooling and water quenching, which cannot meet the complex and precise cooling control requirements. Annealing is a heat treatment process for metal materials and non-metal materials, which refers to slowly heating the metal to a certain temperature, keeping it for a sufficient time, and then cooling it at an appropriate speed; its purpose is to reduce hardness, improve machinability, and eliminate residual Stress, stable size, reducing deformation and crack tendency, refining grain, adjusting structure, eliminating organizational defects. It can be seen that...

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Problems solved by technology

Ordinary heat treatment furnaces (such as resistance furnaces, salt bath furnaces, etc.) are one of the most important equipment for annealing experiments in my country's iron and steel enterprises. Quenching can not meet the complex and precise cooling control requirements; while the thermal cycle process control of the thermal simulation testing machine is better, the disadvantage is that the sample is small, and subsequent stretching and deep drawing experiments cannot be carried out. Another disadvantage is that the annealing process cannot be carried out. Research on surface reaction; while the continuous annealing simulation device requires coiled raw materials, high experimental cost, long cycle, and inflexible adjustment of process parameters

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