Heat transfer mode of vacuum atmosphere sintering furnace

Heat transfer during heating is a complex phenomenon. The heat transfer process of an object can be divided into three basic modes: conduction, radiation, and convection.
1、 Conduction refers to the phenomenon of heat transfer that occurs when objects with different temperatures or temperatures within an object come into direct contact without relative displacement of particles. In liquids and non conductive objects, the transfer of heat depends on the action of elastic waves; Inside the metal, it relies on the movement of free electrons; In gas, it mainly depends on the diffusion and collision of atoms or molecules.
Heat transfer mode of vacuum atmosphere sintering furnace
2、 Radiation is a process of transmitting heat energy by electromagnetic waves. Radiation heat transfer not only involves the transfer of energy, but also is accompanied by the transformation of energy forms, that is, thermal energy is converted into radiant energy, and the radiated radiant energy is absorbed and then converted into thermal energy.
3、 Convection refers to the transfer of heat caused by the relative displacement of various parts of a fluid. The heat exchange that occurs when a fluid passes through another object's surface is called convective heat transfer, including the conduction process in the laminar flow layer near the object's surface and the convection process outside the flow layer. The convection caused by the temperature and density of the fluid itself is called "natural flow", and the heat transfer between the fluid and the surface is called "natural convective heat transfer"; The flow generated by the application of various mechanical forces is called "forced flow", while the heat transfer between the fluid and the surface is called "forced convective heat transfer.".
In practical work, the heat transfer methods of furnace types such as vacuum atmosphere furnaces are generally a comprehensive process in which two or three methods act simultaneously.