The existence of defects in TC4 titanium forging, some will affect the quality of subsequent processing or processing quality, some will seriously affect the performance and use of titanium forging, titanium alloy forging, and even greatly reduce the service life of the finished product, endangering safety. Therefore, in order to ensure or improve the quality of titanium forgings, in addition to strengthen quality control in the process, take corresponding measures to eliminate the production of titanium forgings defects, but also necessary quality inspection should be carried out to prevent the flow of titanium forgings with defects that have a bad impact on the subsequent process (such as heat treatment, surface treatment, cold working) and performance of the subsequent process. After quality inspection, remedial measures can also be taken for the titanium forgings according to the nature of the defects and the degree of influence on the use, so as to make them meet the technical standards or the requirements of use.
Therefore, the quality inspection of titanium forgings, in a sense, on the one hand is to control the quality of the produced titanium forgings, on the other hand is to point out the improvement direction of the forging process, so as to ensure that the quality of titanium forgings meets the requirements of the technical standards of titanium forgings, and meet the requirements of design, processing and use. The inspection of titanium forging quality includes the inspection of appearance quality and internal quality. Appearance quality inspection mainly refers to the inspection of the geometric size, shape and surface condition of titanium forgings. The inspection of internal quality mainly refers to the inspection of 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 is defective, what is the nature of the defect, what is their morphological characteristics
What? The inspection content of the surface state is generally to check whether the surface of the titanium forging has surface cracks, folding, wrinkling, tangerine bubble, spot scar. Corrosion pit. Scratches, foreign objects, not filled, pits, missing flesh, scratches, etc
Sink. And the inspection of internal quality is to check the internal quality of titanium forging itself, is the appearance of quality inspection can not be found, it includes the inspection of the internal defects of titanium forging, also includes the inspection of the mechanical properties of titanium forging, and on Critical parts. Critical parts or large titanium forgings should also be subjected to chemical composition analysis. For internal defects, we will test whether there are internal cracks, shrinkage holes, porosity, titanium forgings by low-power inspection, fracture inspection and high-power inspection methods.
Coarse crystal, white dot dendritic crystal, streamline disconformity shape, streamline disorder, flow through, coarse crystal ring, oxide film, delamination, overheat and overburning structure defects. And for the mechanical properties are mainly checked at room 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.
Because titanium forgings made of parts, in the process of use of its stress, importance, working conditions are different, the material and metallurgical process is different, so different parts according to the above situation and in accordance with the requirements of the department of titanium forgings into categories, different departments, different standards of titanium forgings classification is different. But no matter how, for the overall quality inspection of titanium forgings are inseparable from two categories of inspection, that is, the appearance of quality and internal quality inspection, but the category of titanium forgings is different, its specific inspection items, inspection quantity and inspection requirements are different. For example, some industries will divide structural steel, stainless steel, heat-resistant steel titanium forgings into class IV for inspection, some departments will divide aluminum alloy titanium forgings and die titanium forgings into dishes for inspection according to their use, and some departments will aluminum alloy. Copper alloy titanium forgings are divided into IV classes for inspection.
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
