Forging technology plays an important role in forging production. The quality of forgings (including shape, dimensional accuracy, mechanical properties, streamline, etc.) obtained by different technological processes are quite different, the types tonnage of equipment used are also quite different. Some special performance requirements can only be solved by replacing materials with higher strength new forging process, such as compressor disk turbine disk of aero-engine. In the process of using, the temperature gradient of disc edge hub is large (up to 300-400 ℃). In order to adapt to this working environment, double performance disc has been developed. Through proper arrangement of forging process heat treatment process, the double performance disc has been developed, The dual performance disk can meet the requirements of high temperature room temperature. Whether the technological process is properly arranged will only affect the quality, but also affect the production cost of forgings; the most reasonable process flow should be that the quality of forgings obtained is good, the cost is low, the operation is convenient simple, the potential of materials can be fully exploited.

The understanding of the importance of technology is gradually deepened with the in-depth development of production the continuous progress of science technology. The appearance of isothermal forging technology has solved the difficulties of forging large precision forgings difficult deformation alloys which need extra large tonnage equipment poor formability. The materials shapes of forgings are very different, the processes used are different. How to deal with these problems correctly is the task of forging engineers.

Forgings are widely used. Almost all the major force bearing components in motion are formed by forging, but the driving force for the development of forging (especially die forging) technology comes the vehicle manufacturing industry automobile manufacturing industry later aircraft manufacturing industry. The size quality of forgings are larger larger, the shape is more more complex refined. The forging materials are more more extensive, the forging is more difficult. This is because modern heavy industry transportation industry pursue long service life high reliability. For example, the ratio of thrust to weight is increasing. Some important stress components, such as turbine disk, shaft, compressor blade, disk, shaft, etc., have wider temperature range, more harsh working environment, more complex stress state rapid increase of stress. This requires that the load-bearing forgings have higher tensile strength, fatigue strength, creep strength fracture toughness.

With the progress of science technology the increasing degree of industrialization, the number of forgings is required to increase year by year. According to foreign forecasts, by the end of this century, 85% of the forging (including sheet metal forming) parts will be used in aircraft, 60% - 70% in automobiles, 70% in agricultural machinery tractors. At present, the annual output of steel die forgings in the world is more than 10 million tons.