The invention discloses a
forging method of tube sheets of
nuclear power equipment, which forges SA-508 Grade 3 Class 2 dual vacuum steel ingots with the weight of 300+ / -20 tons by using a 165000
ton hydraulic press. The method comprises the following specific steps of step 1, first continuous upsetting, ensuring that the
forging rate is 1.85; step 2, first extension by using a wide smashing and strong compressing method; step 3, second continuous upsetting, ensuring that the
forging rate is 2.1; step 4, second extension; step 5, third continuous upsetting; step 6, forging and pressing by using a differential temperature
compression method; immediately spraying
frost to forging parts for cooling or carrying out wind cooling after the third continuous upsetting so that the surface of the forging part is cooled to 700 to 800 DEG C, and then forging by using the differential temperature
compression method; and step 7, finally rotating 360 degrees for crossed forging. By carrying out continuous upsetting twice and combining the wide smashing and strong compressing method and the differential temperature
compression method, the invention is capable of completely forging the forging part and obtaining uniform deformation of the forging part, and can integrally compress tube sheet forging parts with extremely thick sections from top to bottom so that the tube sheet forging parts havefine and uniform grains, and stable performance can meet requirement of fault detection and further meet various technical conditions of
nuclear power tube sheets.