Many people do not understand the relevant production processes for large ring forgings, so the following article mainly introduces the relevant production processes for large ring forgings.
1. Sliding wire blanking:
Cutting steel ingots into reasonable sizes and weights according to product requirements;
2. Heating (including tempering):
The heating equipment is mainly a single chamber furnace. Push rod furnace and bench type annealing furnace. All heating furnaces use natural gas as fuel. The heating temperature of steel ingots is generally 1150 ℃~1240 ℃, and the heating time of cold steel ingots is about 1-5 hours.
3. Forging:
Heat to about 1150~1240 ℃, take the steel ingot out of the heating furnace, and then put an air hammer or electro-hydraulic hammer into the operating machine. Monitor the size of the forging in real time according to the size and forging ratio requirements of the steel ingot, and control the forging temperature through an infrared thermometer.
4. Inspection:
The preliminary inspection of blank forgings mainly involves the inspection of appearance and dimensions. In terms of appearance, the main inspection is whether there are cracks and other defects. In terms of dimensions, it is necessary to ensure that the remaining blank parts are within the range required by the drawing, and make records.
5. Heat treatment:
The forging is heated to a predetermined temperature, held for a period of time, and then cooled at a predetermined speed to improve the internal structure and properties of the forging. The purpose is to eliminate internal stress, prevent deformation during processing, adjust hardness, and make the forging advantageous for cutting. The steel ingot after heat treatment shall be subjected to air cooling or water cooling treatment according to the material requirements. Quenching treatment.