Heat treating steels is a crucial process that requires precise control over temperature and environment.
There are several types of furnaces designed specifically for this purpose.
Let's explore the five main types of furnaces used for heat treating steels.
5 Types of Furnaces Used for Heat Treating Steels
1. Salt Bath Furnaces
Salt bath furnaces use a bath of molten salt to heat the steel.
This method provides precise control over the temperature and atmosphere during the heat treating process.
2. Controlled Atmosphere Furnaces
Controlled atmosphere furnaces create a controlled environment by introducing gases such as nitrogen or argon into the furnace.
This helps to prevent oxidation and achieve the desired heat treatment results.
3. Fluidized-Bed Furnaces
Fluidized-bed furnaces use a bed of finely divided particles, such as sand or alumina, to heat the steel.
The steel is submerged in the fluidized bed, which provides even heating and uniform heat treatment.
4. Vacuum Furnaces
Vacuum furnaces are commonly used for heat treating certain types of steels.
These furnaces create a vacuum environment, which eliminates the presence of oxygen and allows for precise control over the heating process.
Vacuum furnaces are often used for heat treating tool steels and other high-performance steels.
5. Electric Resistance Furnaces
In addition to the specific types mentioned above, electric resistance furnaces are commonly used for heat treatment of metals and alloys.
These furnaces use electric resistance heating to reach and control the desired temperatures.
Induction heating is also a commonly used method for surface hardening of steel.
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