The general situation of castings is not allowed to have cracks, shrinkage cavity, penetration defects and serious defects. Neiqiu county is located in the southwest of Hebei Province, the Midwest of Xingtai City, the eastern foot of Taihang, between the longitude of ° 4 ″ to 4 ″ and the latitude of 7 ″ to 7 ″ north

The primary benefit of careful forging compared with traditional die forging is its lower material consumption (less than 60%). The forging process is as follows: blanking - heating (850 ± lo ℃) - upsetting - pre forging - trimming - air cooling, blast cleaning - heating (850 ± 10 ℃) - final forging - trimming - air cooling, grinding - warehousing.

Deformation and correction of tooling large-scale castings in 6803 square inch castings of Forging Branch of China Second Heavy Machinery Group Co., Ltd