The existence of defects in titanium forgings, some will affect the quality of subsequent processing or processing, some will seriously affect the performance and use of titanium forgings, and even greatly reduce the service life of finished products, endangering safety. So in order to ensure or improve the quality of titanium forgings, in addition to strengthen the quality control in the process, take corresponding measures to put an end to produce titanium forgings defects, should also make the necessary quality inspection, to prevent with the subsequent process (e.g., heat treatment, surface treatment, cold working) and use the defect of bad influences on the performance of titanium forgings to shed the subsequent working procedure. After quality inspection, according to the nature of defects and the degree of impact on the use of titanium forgings have taken remedial measures, so that it meets the technical standards or requirements of use.

Therefore, the quality inspection of titanium forgings in a sense, on the one hand, is to check the quality of titanium forgings, on the other hand, is to point out the improvement direction of forging process, so as to ensure that the quality of titanium forgings meets the requirements of titanium forgings technical standards, and meet the requirements of design, processing and use. The quality inspection of titanium forgings includes the inspection of appearance quality and internal quality. Appearance quality inspection mainly refers to the geometrical size, shape and surface condition of titanium forgings. The inspection of internal quality mainly refers to the chemical composition, macroscopic structure, microstructure and mechanical properties of titanium forgings.

Specifically, the appearance quality inspection of titanium forgings is to check whether the shape and geometric size of titanium forgings meet the requirements of the pattern, whether the surface of titanium forgings has defects, what is the nature of the defects, and what are their morphological characteristics. The inspection content of the surface state is generally to check whether the surface of titanium forgings has surface cracks, folds, wrinkles, pits, orange peel, bubbles, spots, corrosion pits, bruises, foreign objects, not full, pits, lack of meat, scratches and other defects. The internal quality inspection is to check the internal quality of titanium forgings itself, is the quality condition that the appearance quality inspection can not find, it includes both checking the internal defects of titanium forgings, also includes checking the mechanical properties of titanium forgings, and the important parts, key parts or large titanium forgings should also be chemical composition analysis. For internal defects, we will check whether there are defects such as internal crack, shrinkage hole, loose, coarse crystal, white spot, dendritic crystal, streamline does not conform to the shape, streamline disorder, flow through, coarse crystal ring, oxide film, stratification, overheating, overburning tissue by low power inspection, fracture inspection, high power inspection method. The mechanical properties are mainly to check the normal temperature tensile strength, plasticity, toughness, hardness, fatigue strength, high temperature instantaneous fracture strength, high temperature durable strength, durable plasticity and high temperature creep strength.

Due to titanium forgings made parts, the stress distribution in the process of using, important degree, working condition is different, its materials and metallurgy process is different, so different parts according to the above situation and according to the requirements of the department will titanium forgings to separate categories, different departments, different standards for the classification of the titanium forgings are also different. But in any case, for the overall quality inspection of titanium forgings are inseparable from two categories of inspection, that is, the inspection of appearance quality and internal quality, but the categories of titanium forgings are different, the specific inspection items, inspection quantity and inspection requirements are different. For example, some industrial departments will structural steel, stainless steel, heat-resistant steel titanium forgings are divided into class ⅳ for inspection, some departments will aluminum alloy titanium forgings and die titanium forgings are divided into class ⅲ for inspection according to their use, and some departments will aluminum alloy and copper alloy titanium forgings are divided into class ⅳ for inspection.