In a sense, the quality inspection of titanium forgings is, on the one hand, to check the quality of the finished titanium forgings, and on the other hand, it is to point out the direction for improvement of the forging process, thereby ensuring that the quality of titanium forgings meets the requirements of titanium forging technical standards and meets the requirements of titanium forging technical standards. Requirements for design, processing and use.
The quality inspection of titanium forgings includes inspection of appearance quality and internal quality. Appearance quality inspection mainly refers to the inspection of geometric dimensions, shape, surface conditions and other items of titanium forgings; internal quality inspection mainly refers to the inspection of chemical composition, macrostructure, microstructure and mechanical properties of titanium forgings.
Specifically, the appearance quality inspection of titanium forgings is to check whether the shape and geometric dimensions of titanium forgings comply with the drawings, whether there are defects on the surface of titanium forgings, what nature the defects are, and what their morphological characteristics are. The inspection content of the surface condition is generally to check whether there are surface cracks, folds, wrinkles, pits, orange peels, blisters, scars, corrosion pits, bruises, foreign objects, underfill, pits, lack of flesh, etc. on the surface of titanium forgings. Scratches and other defects.
The internal quality inspection is to check the intrinsic quality of the titanium forgings themselves, which is a quality condition that cannot be discovered by the appearance quality inspection. It includes not only checking the internal defects of the titanium forgings, but also checking the mechanical properties of the titanium forgings, and for important parts and key parts. Or large titanium forgings should also undergo chemical composition analysis. For internal defects, we will use low-magnification inspection, fracture inspection, and high-magnification inspection to inspect titanium forgings for internal cracks, shrinkage cavities, looseness, coarse grains, white spots, dendrites, streamlines that do not conform to the shape, and streamlines. Defects such as disorder, cross-flow, coarse crystal ring, oxide film, delamination, overheating, over-burning structure, etc. As for the mechanical properties, it mainly checks the normal temperature tensile strength, plasticity, toughness, hardness, fatigue strength, high temperature instantaneous fracture strength, high temperature lasting strength, lasting plasticity and high temperature creep strength, etc.
