Hot forging involves heating metal above its recrystallization temperature and shaping it into the desired form using dies. This process enhances material properties and allows for complex shapes to be forged with precision.
Types of Hot Forging Parts Material
AISI 1010, AISI 1018, AISI 1020, AISI 1026, AISI 4130, AISI 4140, AISI 4330, AISI 4340, AISI 8620, AISI 8630, AISI 9310, Nitralloy 135,ect
Hot Forging Temperature
Hot forging temperature of steel: Typically, the hot forging temperature is between 950 °C and 1250 °C, which is higher than the recrystallization temperature. In general, we can see good formability (i.e., cavity filling during forging), low forming forces and almost uniform tensile strength of the workpiece.
Differentiate Between Hot and Cold Forging
| Table 1 Comparison of cold forging and hot forging | ||
|
|
Cold forging | Hot forging |
| Process temperature | Room temperature | 1 000–1 250°C |
| Material flow stress | High | Low |
| Forging pressure | High | Low |
| Annealing before forging | Necessary | Unnecessary |
| Material deformability | Low | High |
| Shape of forgings | Complex in some cases | Complex |
| Dimensional accuracy of forgings | High | Low |
| Surface condition of forgings | Fine | Oxidized and decarburized |
| Lubricant | Phosphate coating plus metal soap, etc. | Graphite, etc |
Advantages Of Hot Forging
The high temperatures of Hot Forging Parts cause maximum deformation of the material, resulting in complex 3D shapes. Hot forged parts are very malleable and therefore suitable for a wide variety of configurations. Technically speaking, hot forging is more flexible than cold forging as it allows for the production of customized parts. The excellent surface quality of hot forging enables a wide range of finishing operations such as polishing, coating or painting, depending on the customer's requirements.
Application Of Hot Forging
Hot forging is most commonly used in the automotive industry. A variety of common automotive forgings are used in automobiles and commercial vehicles. In the aerospace industry, in addition to forged parts, high-strength, heat-resistant special materials, lightweight structural materials, etc. Hot forging is not only used in the automotive and aerospace industries. There are other important applications. Hot forgings are used in the construction industry, mechanical engineering, agriculture, steel construction, marine industry, and other industries.
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