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Forging quality inspection items are as follows:

(1) Geometric Shapes and Dimensions

General forging dimensions are measured using steel rulers, calipers, templates, and other measuring tools; for complex-shaped die forgings, the marking method can be used for inspection.

(2) Surface Quality

If there are cracks, dents, or fold defects on the forgings' surface, they are generally visible to the naked eye. Sometimes, cracks may be small and the depth of the fold uncertain; in such cases, re-cleaning and observation can be done; if necessary, the detection method can be used.

(3) Internal Organization

Internal defects such as cracks, inclusions, and porosity in forgings can be inspected using the naked eye or a magnifying glass between 10 to 30 times on the forging cross-section. A commonly used method in production is acid etching inspection, where a sample is cut from the part of the forging that needs to be examined and immersed in an acidic solution to clearly reveal the defects of the macrostructure on the cross-section, such as forging flow lines, cracks, and inclusions.