Box-type atmosphere sintering furnace heat transfer mode
Time：2015-07-23 10:00
Using electric heating devices, which heat is a way that the furnace temperature uniformity? Our technical department, based on years of practice and reference literature summarized after the following basic ways:
During the heating process of heat transfer is a complex phenomenon. Heat transfer process objects into three basic ways of conduction, convection and radiation.
1, the conductive means in the absence of relative displacement of the particle, the internal heat when in direct contact with objects having different temperatures or different temperatures of the object transfer phenomenon occurred. In liquids and non-conductive objects, the transfer of heat is by elastic waves effect; inside the metal relied on free movement of electrons; in the gas diffusion and rely mainly on collision of atoms or molecules.
2, due to the heat convection means of relative displacement of each portion of the fluid transfer caused. Heat exchange fluid that occurs when the surface of another object called by the convective heat transfer, including the process of conducting the process of convection near the surface layer and the layer of laminar flow layer outside the convection due to the different temperature and density of the fluid itself caused, said " natural flow ", and the heat transfer between the fluid and the surface is called" natural convection "; plus a variety of flow due to mechanical force produced called" forced flow ", and the heat transfer between the fluid and the surface called" forced convection hot. "
3, radiation is an electromagnetic wave propagation by a thermal process. Radiation heat transfer not only energy transfer, and accompanied by a form of energy conversion, namely energy into radiant energy radiated radiation can be absorbed and then converted into heat.
In practice, the vacuum furnace, box-type atmosphere furnace, furnace heat transfer process can be seen rarely a single heat transfer, in most cases two or three simultaneous action of the synthesis process.
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