Do you know the flame heating method of hot forging from China? Let's find out together below!
Flame heating is the use of fuel (coal, coke, heavy oil, diesel and gas) to burn in a flame heating furnace to generate a high-temperature gas (flame) containing a large amount of heat energy, and transfer the heat energy to the surface of the blank through convection and radiation, and then conduct heat from the surface to the center. The metal blank is heated.

When the heating temperature is lower than 600 ~ 700 ℃, the heating of the blank is mainly by convection heat transfer. The so-called convection heat transfer means that the flame flows continuously around the blank, and the heat energy is transferred to the metal blank by means of the heat exchange between the high temperature gas and the surface of the blank. When the heating temperature exceeds 700 ~ 800 ℃, the heating of the blank is mainly based on radiation heat transfer. The so-called radiative heat transfer is to convert thermal energy into radiant energy through high temperature gas and furnace. Generally, when an ordinary forging furnace is heated at high temperature, the radiation heat transfer accounts for more than 90%, and the convection heat transfer accounts for only 8% to 10%.
The above is an introduction to the flame heating method of hot forging from China.