After titanium forgings are made into parts, the force, importance and working conditions are different in use, and the material and metallurgical process are also different. Therefore, titanium forgings are classified in different parts according to the above conditions and according to the requirements of the department. Titanium forgings are classified differently in different departments and standards. However, the quality inspection of titanium forgings can not be separated from two kinds of inspection, namely appearance quality inspection and internal quality inspection. However, due to the different types of titanium forgings, 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 classified as class inspection, some departments will aluminum alloy titanium forgings, mold titanium forgings are classified as class inspection according to the use conditions, and some departments will aluminum alloy and copper alloy titanium forgings are classified as class inspection.

Specifically, the appearance quality inspection of titanium forgings is to check whether the shape and geometric size of titanium forgings conform to the provisions of the drawings, whether there are defects on the surface of titanium forgings, what is the nature of the defects, and what are the morphological characteristics. The inspection content of the surface condition is generally to check whether the surface of titanium forgings has surface cracks, wrinkles, wrinkles, pits, orange peel, bubbles, scars, corrosion pits, collisions, foreign bodies, incomplete, pits, lack of meat, scratches and other defects. Internal quality inspection is to check the internal quality of titanium forgings, which can not be found by appearance quality inspection. It not only includes checking the internal defects of titanium forgings, but also includes checking the mechanical properties of titanium forgings, and chemical composition analysis of important parts, key parts or large titanium forgings. For internal defects, we will check whether there are internal cracks, shrinkage holes, loose, coarse crystal, white spots, dendrites, streamline does not conform to the shape, streamline disorder, flow, coarse crystal ring, oxide film, stratification, overheating, overburning tissue defects. Mechanical properties, mainly check room temperature tensile strength, plasticity, toughness, hardness, fatigue strength, high temperature instantaneous fracture strength, high temperature durable strength, durable plasticity and high temperature creep strength.

Some defects of titanium forgings will affect the processing quality of subsequent processes or processing quality, while other defects will seriously affect the performance and use of titanium forgings, and even greatly reduce the service life of finished parts, endangering safety. Therefore, in order to ensure or improve the quality of titanium forgings, in addition to strengthen the quality control in the process of, take appropriate measures to eliminate the defects of titanium forgings, also should undertake the necessary quality inspection, to prevent the existence of the follow-up process (such as heat treatment, surface treatment and cold working) is bad and the use of performance defects of titanium forgings into the subsequent process. After quality inspection, according to the nature of the defect and the degree of impact on the use of titanium forgings to take remedial measures to make it meet the technical standards or use requirements.

Therefore, in a sense, the quality inspection of titanium forgings on the one hand is to test the quality of manufactured titanium forgings, on the other hand is to point out the improvement direction for forging process, so as to ensure that the quality of titanium forgings meet the technical standards of titanium forgings, meet the requirements of design, processing and use. Quality inspection of titanium forgings includes external quality inspection and internal quality inspection. Appearance quality inspection mainly refers to the inspection of the geometric size, shape and surface condition of titanium forgings. Internal quality inspection mainly refers to the chemical composition, macroscopic structure, microscopic structure and mechanical properties of titanium forgings.