Now, in order to ensure better processing performance of connector die forgings, during forging production, such as the presence of residual inclusions or similar steel ingots, will cause forging cracks and scratch the surface. Even if there are only cracks in raw materials and products, there will be forging defects. Therefore, raw materials must be tested during production and forging.

Due to the research on the microstructure effect of heat treatment in the alloy die forging system, the software optical microscope and the image using the hot forging method understand that its characteristics are that the temperature of the heated billet exceeds the phase transformation point and the mold temperature is lower than the phase transformation point, and the microstructure of the hot die forging lacks uniformity, which is caused by the phase transformation and uneven deformation during the deformation process, The heat treatment system cannot completely remove the inhomogeneity of the microstructure of alloy die forgings.

However, with the extension of high temperature holding time, the degree of irregularity decreases. In the case of double heat treatment, the cooling rate after heat treatment is slower. In addition to transverse surface cracks, transverse cracks can also occur in die forgings, because the cold ingot is heated too fast in the low temperature zone during the forging process or the tension caused by the center, or the plasticity of high carbon steel and high alloy steel is poor, which is caused by too little power in the forging operation.