With the vigorous development of our industrial construction, metallurgy, machinery, electric power, petroleum, chemical, shipbuilding, aviation, national defense industry, as well as some light industrial departments such as equipment are developed to the direction of large capacity, high power, high performance, service for the industry of large forgings quality standard is more and more high, weight and size is bigger and bigger. Whether this forging can be produced is one of the basic conditions for providing large mechanical and electrical products in modern equipment for the above-mentioned departments. Therefore, the production of large forgings plays an important role in the national economy. For example, the diameter of the set type forged steel support roll of the 4200 extra-thick plate mill is 1800 mm, the length of the roll is 4200 mm, and the single weight is 110t. The largest cold rolling roll diameter is 900 mm; Longyangxia Hydropower Station 320,000 kW turbine shaft forgings weight 150t, steel ingot forgings weight 260t; The blank of the rotor forgings of the 600,000-KW thermal generator weighs 109t, and the steel ingot used for forging weighs 210t.
Metallurgy, forging and power generation equipment is the basis of the development of modern industry and national economy, is an important product of heavy machinery manufacturing industry, but also the main products that need large forgings. One of the keys to making these devices is the production of large forgings. Forgings required by thermal, hydraulic and atomic power generation equipment require high quality and can be used as representative products of large forgings. Attaching importance to and strengthening the production of large forgings, improving quality, reducing production cost and shortening production cycle are of great significance for promoting the production of heavy machinery products, developing industry and agriculture and consolidating national defense.