The hot forging manufacturer tells you that the purpose of heating the metal blank before forging is to improve the plasticity of the metal, reduce the deformation resistance, make it easy to flow and form and obtain a good forging structure. The hot forging manufacturer tells you that heating before forging has a direct impact on improving forging productivity, ensuring forging quality and saving energy consumption. According to the different heat sources used, the heating methods of metal blanks can be divided into two categories: flame heating and electric heating.

1. Flame heating. The hot forging manufacturer tells you that 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 heat energy to the surface of the blank through convection and radiation. , and then conduct heat from the surface to the center to heat the metal blank.

The hot forging manufacturer tells you that 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.

The hot forging manufacturer tells you that 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 a furnace. Generally, when an ordinary forging furnace is heated at a high temperature, the radiation heat transfer accounts for more than 90%, and the convection heat transfer accounts for only 8% to 10%.

The hot forging manufacturer tells you that the advantages of the flame heating method are that the fuel source is convenient, the furnace is simple to build, the heating cost is low, and the adaptability to the blank is wide. However, the labor conditions are poor, the heating speed is slow, the efficiency is low, and the heating quality is difficult to control. This heating method is widely used in the heating of various blanks.

2. Electric heating. The hot forging manufacturer tells you that electric heating heats metal blanks by converting electrical energy into heat. Among them are induction electric heating, contact electric heating, resistance furnace heating, and salt bath furnace heating.

Through the above introduction and analysis of the heating method of hot forging, hope it helps you.