Introduction to the advantages and disadvantages of hot forging

Hot forging: A forging process in which a metal material is heated to a temperature higher than the recrystallization temperature and subjected to press working in a state below the solidus line.

Recrystallization temperature: A rough calculation may take 0.4 times the melting point of the metal as the recrystallization temperature.

Taixing Pengsheng aluminum forgings indicate that for forging products, the cold forging process can obtain better flatness, the hot forging process has the worst flatness, and the warm forging (the temperature of the metal material is between cold forging and hot forging) is flat. The degree is medium.

Advantages and disadvantages of hot forging

Advantages: If the temperature of the forging material is still much higher than the recrystallization temperature after processing, the crystal grains will grow for a long time, and coarser crystal grains will be obtained, which can increase the fracture toughness (low crack growth rate).

Disadvantages:

(1) Because of the high temperature operation, the danger to personnel safety and material safety is great.

(2) The material is prone to oxidation at high temperatures, causing scale, resulting in surface area scale, smoothness and flatness.

(3) After the hot forging is completed, the forging material has a shrinkage phenomenon during the cooling process, which affects the precision of the forging size.

(4) Equipment and maintenance costs required for high temperature operation are high.