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Heat treatment process of metal in Box Furnace

Author: admin time: 2019-02-25 source: unknown
Abstract: box type resistance furnace, box type electric furnace, laboratory electric furnace, high temperature electric stove.

The heat treatment process of the quenching process of box type furnaces usually includes three processes, namely heating, insulation and cooling, sometimes only heating and cooling. These processes are interrelated and uninterrupted. Heating is one of the important processes of heat treatment. There are many heating methods in metal heat treatment, which use charcoal and coal as heat source, then use liquid and gas fuel, and electric application makes heating easy to control. Environmental protection, these heat sources can be used for direct heating or indirect heating of molten salt or metal or floating particles.


     Box type furnace When the metal is heated, the workpiece is exposed to air, often oxidizing and decarbonization, that is, the carbon content on the surface of the steel component, which will adversely affect the surface properties. Therefore, metals should normally be heated in molten salts or neutralized in controlled atmospheres or protective atmospheres, or protected by coating or packaging.

Tempering is the rapid cooling of the workpiece after quenching and heating in the quenching medium such as water, oil or other inorganic salts or organic aqueous solutions. After quenching, the steel becomes hard but brittle at the same time. In order to reduce the brittleness of the steel, the hardened steel is kept for a long time at a suitable temperature above room temperature and below 650 degrees centigrade, and then cooled. This process is called tempering, annealing, normalizing, quenching and tempering are the four fires in the whole heat treatment. Among them, quenching and tempering are closely related, often used together, they are essential, "four fires" evolved different heating temperature and cooling method of different heat treatment process.

In order to obtain certain strength and toughness, quenching and high-temperature tempering are called quenching and tempering. After quenching some alloys to form supersaturated solid solutions, they are kept at room temperature or slightly higher temperature for a longer time to increase the hardness, strength or electromagnetic properties of the alloys. This heat treatment process is called aging treatment.

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