Tempering is to heat ordinary annealed glass in tempering furnace quickly and evenly to the temperature close to the softening point of glass, then cool the glass quickly and evenly with proper cooling speed. During the cooling process, a kind of compressive stress is formed on the surface of glass. When the glass is damaged, the compressive stress on the surface of glass must be counteracted first, so as to improve the strength of the equipment of the tempering furnace and increase the damage. The number of particles makes it have the properties of safety glass.

Heating of tempered glass:

In the tempering process of glass, heating is one of the key and important links. The basic requirement of glass heating in horizontal toughening process is that the glass must be heated rapidly to the required temperature. When heated, the temperature in different areas of glass can be controlled within a set range, and the temperature difference between the surface and the center of glass should be small. In the process of heating, the glass will not deform and the appearance quality of glass will not change. The homogeneity of heating is the core of heating and difficult to solve. At present, various steelmaking furnace manufacturers adopt new methods and new processes to solve the homogeneity of steelmaking heating to a greater extent.

Heating of tempered glass:

In the tempering process of glass, heating is one of the key and important links. The basic requirement of glass heating in horizontal toughening process is that the glass must be heated rapidly to the required temperature. When heated, the temperature in different areas of glass can be controlled within a set range, and the temperature difference between the surface and the center of glass should be small. In the process of heating, the glass will not deform and the appearance quality of glass will not change. The homogeneity of heating is the core of heating and difficult to solve. At present, various steelmaking furnace manufacturers adopt new methods and new processes to solve the homogeneity of steelmaking heating to a greater extent.

2. Radiation: The heating wire in the furnace transfers heat radiation to the glass. In the process of glass heating, the control of radiation heat is an important technology to ensure the uniformity of glass heating. However, it is more difficult to control the radiation heat in the tempering furnace because the film on the surface of the coated glass reflects the radiation heat to varying degrees.

3. Convection: Heat is transferred to glass by forced hot air flow in the furnace. Convective heating does not take into account the type of glass, regardless of the type of glass, hot air molecules transfer heat to the glass through forced flow. Therefore, convection heating is very effective for all kinds of glass, and the convection heating speed is faster than radiation heat transfer.