The so-called forging, in fact, the structure is similar to our current blacksmith, its principle. But one is to apply pressure to the material by machine, and the blacksmith is to forge it by hand. The ultimate goal is to get products with better mechanical properties and shapes and sizes.

Why can we only do this by forging? Because forging can offset the as-cast loose defects caused by metal smelting, it can better make the microstructure have better physical characteristics.

Temperature and classification required for forging

Since most of the material is steel, we define it in terms of steel recrystallization temperature. Common steel for the recrystallization temperature of 727℃. So, 800 degrees Celsius is usually used as the dividing line. Let > 800℃ is called hot forging; And between 300 ~ 800℃ is called semi-hot forging, at room temperature without heating is called cold forging. Most of the forgings are hot forging, and semi-hot forging and cold forging are generally used in automobiles, general machinery and other parts, the main reason is that semi-hot forging and cold forging can save costs and materials.

Forging is classified by form

Can be divided into: free forging, die forging, roller ring, special forging, etc.

1. Free forging: The basic processes of free forging include upsetting, drawing, punching, cutting, bending, torsion, dislocation and forging, etc.

2, die forging: open die forging and closed die forging. Refers to the material in the cavity compression deformation and forging, die forging is generally used to produce small weight, large batch parts.

3, roller ring: refers to the use of roller ring machine to get different diameters of ring products, used to produce car hub, train wheels and other wheel shaped parts.

4, special forging: including roll forging, cross wedge rolling, radial forging, liquid die forging and other ways, most suitable for the production of some special shape parts.