After direct or local heating (such as flame heating), tap and straighten;
Press that inner hole of the thin-wall part into the mandrel, and then temper;
The two end face of that thin plate part are clamped and fix by a splint, and then tempered;
Simply polish the bottom surface of the parts with sandpaper to improve the flatness of the bottom surface;
After the quenching deformation of thin-walled parts is out of tolerance, the pressure quenching process is adopted for rework.