Some defects of TC4 titanium forgings will affect the processing quality or processing quality of subsequent processes, while others will seriously affect the performance and use of titanium forgings and titanium alloy forgings, and even greatly reduce the service life of finished products, endangering safety. Therefore, in order to ensure or improve the quality of titanium forgings, in addition to strengthening the quality control in the process and taking corresponding measures to eliminate the occurrence of defects in titanium forgings, necessary quality inspection should also be carried out to prevent titanium forgings with defects that have adverse effects on subsequent processes (such as heat treatment, surface treatment, cold working) and service performance from flowing into subsequent processes. After the quality inspection, remedial measures can also be taken for the made titanium forgings according to the nature of the defects and the extent to which they affect the use, so that they meet the technical standards or use requirements.
Therefore, in a sense, the quality inspection of titanium forgings is, on the one hand, to check the quality of the titanium forgings that have been made, and on the other hand, to point out the direction of improvement for the forging process, so as to ensure that the quality of titanium forgings meets the requirements of the technical standards for titanium forgings and meets 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 inspection of geometric dimension, shape, surface condition and other items of titanium forgings; The 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 the shape of titanium forgings. Whether the geometric dimensions meet the requirements of the drawing, whether there are defects on the surface of titanium forgings, what are the defects, and what are their morphological characteristics
Well. The inspection content of surface condition is generally to check whether there are surface cracks, folds, wrinkles and pits on the surface of titanium forgings Orange peel blisters, scabs, corrosion pits, bruises, foreign objects, underfilled, pits, lack of meat, scratches and other defects. The internal quality inspection is to check the internal quality of titanium forgings, which is a quality condition that cannot be found in the appearance quality inspection. It includes both the inspection of internal defects of titanium forgings and the inspection of mechanical properties of titanium forgings. Chemical composition analysis should also be carried out for important parts, key parts or large titanium forgings. For internal defects, we will check whether titanium forgings have defects such as internal crack, shrinkage cavity, porosity, coarse crystal, white point dendrite crystal, streamline inconformity with the shape, streamline disorder, flow through, coarse crystal ring, oxide film, delamination, overheating and overburning structure by means of low magnification inspection, fracture inspection and high magnification inspection. The mechanical properties mainly include tensile strength at room temperature, plasticity, toughness, hardness fatigue strength, high temperature instantaneous breaking strength, high temperature endurance strength, endurance plasticity and high temperature creep strength.
After titanium forgings are made into parts, their stress, importance and working conditions are different during use, and their materials and metallurgical processes are also different. Therefore, different parts shall be based on the above conditions and the requirements of the department
Titanium forgings are classified into different categories according to different departments and standards. However, as a whole, the quality inspection of titanium forgings can not be separated from two types of inspection, namely, the inspection of appearance quality and internal quality. However, different types of titanium forgings have different specific inspection items, inspection quantities and inspection requirements. For example, some industrial departments divide structural steel, stainless steel and heat-resistant steel titanium forgings into Class IV for inspection, some departments divide aluminum alloy titanium forgings and die titanium forgings into subcategories for inspection according to their use, and some departments divide aluminum alloy and copper alloy titanium forgings into Class IV for inspection.
Amanda
Company: Baoji Dynamic Trading Co., Ltd
Country:China
Add:Baoti road,Jintai,Baoji city,Shaanxi,China
Cel/Whatsapp :+86 18309262795
Email:annie@jmyunti.com
Website:www.jm-titanium.com
