How about the quality of the inner arm die forgings?

If the heating rate is too fast, due to stress and temperature stress cracking, the temperature difference between the inner layer and the outer layer of the central part will be caused. When the heating temperature is too high and the holding time is too long, it will lead to slight overheating, so that the coarse crystal is bright fracture crystal fracture. Therefore, the heat must be controlled. In order to improve the grain refinement structure, the mechanical properties of steel with this structure, it is necessary to produce complete recrystallization annealing.

Now, even more different modified embodiments are introduced. The application of different forms of blank in the thermo-mechanical conditions will lead to different organizational characteristics and physical field evolution. Therefore, different from the forging process, its quality will be changed. Therefore, the design of the forging and forging matrix quality matrix will be further designed to provide the reality of forging and tolerance selection. The forging production of each link has little impact on the quality of die forgings. At present, the high temperature tensile test, The performance parameters obtained during the quenching numerical simulation, as well as the forging of the mechanical model basic structure finite software element aviation aluminum box girder, affect the distribution of the residual tension of the cooling steel and shape. It is proved by experiments that the residual stress of the forged structure cooling air beam should be concentrated at the junction of the web and the frame.

Cause the distribution of internal and external pressure of the pull ring, the tempering temperature has a significant impact on the residual stress, and the cooling temperature can effectively reduce the residual voltage. For the defect causes and technical measures of the surface die forgings, the main causes of the forging cracks on the surface of the disc flange, to ensure that the mold preheating temperature is higher than the required value, and strictly control the stamping quality of the round cake. When obtaining and using the forged equipment parts, The quality requirements of hot forging process specifications are obtained.