For the front axle head die forgings, relevant quality inspection is required. The inspection is divided into appearance quality inspection and internal quality inspection. The appearance quality inspection is usually a non-destructive inspection, which can be carried out by the naked eye or by the lower section of the magnifying glass. If necessary, non-destructive testing can also be used to check the internal quality of the die forgings. Due to the requirements of content inspection, some must use destructive testing.

Its usual anatomical evidence, and some can also use non-destructive testing to more accurately evaluate the quality of die forgings. Destructive test methods and non-destructive test methods should be used together. In order to understand the quality of die forgings at a deeper level, mechanical research work is also assisted by transmission probe or scanning electron microscope. Now, the commonly used test methods for internal quality die forgings, It is the macroscopic inspection method to test the mechanical properties of the microscope, analyze the chemical composition and the non-destructive test method. The macroscopic inspection is to use the visual magnification or low magnification lens to observe to understand the characteristics of the material.