What is "cold forging, warm forging, and hot forging"

Cold forging is also called cold volume forming, commonly known as heading. It is a manufacturing process and a processing method. zhi is basically the same as the cold stamping process. The cold forging process is also composed of three elements: material, die and equipment. But the material in the stamping process is mainly plate, while the material in the cold forging process is mainly disc or wire.

Features: high dimensional accuracy, good surface roughness, good working conditions and high production efficiency.

Warm forging refers to the forging of steel forgings below the crystallization temperature and above normal temperature. The purpose of using the warm forging process is to obtain precision forgings. The purpose of warm forging is to improve the precision and quality of the forgings without the large forming force of cold forging. The application of warm forging process is closely related to forging material, forging size, and forging complexity.

Features: The deformation temperature requires strict control, and heating equipment is required. Because the resistance of warm forging is greater than that of hot ball.

The forging process performed above the metal recrystallization temperature is called hot forging.

Features: Reduce the deformation resistance of the metal, change the as-cast structure of the steel ingot, and improve the plasticity of the steel. This is especially important for some high-alloy steels that are brittle and difficult to forge at low temperatures.

The main purpose of hot forging
1. Reduce the deformation resistance of the metal, thereby reducing the forging pressure required for the deformation of the bad material, and greatly reducing the tonnage of the forging equipment;

2. Change the as-cast structure of the steel ingot. After recrystallization in the hot forging process, the coarse as-cast structure becomes a new structure with fine grains, which reduces the defects of the as-cast structure and improves the mechanical properties of the steel;

3. Improve the plasticity of steel, which is particularly important for some high-alloy steels that are brittle and difficult to forge at low temperatures.

More about:hot forging steel