Similar to other metals, titanium tubes shrink during casting, undergoing a transition from liquid to solid and then back to solid. This shrinkage behavior is generally categorized into two types: bulk shrinkage and linear shrinkage.
Body shrinkage intuitively reflects the change in the overall volume of a titanium tube during the casting process. In titanium alloy casting, total bulk shrinkage is equal to the sum of the volume of concentrated shrinkage cavities and shrinkage porosity in the casting. Therefore, the solidification shrinkage behavior of alloy casting is closely related to the alloy's bulk shrinkage, which directly determines the characteristics of shrinkage cavities and porosity defects in titanium alloys. A deeper understanding of the bulk shrinkage behavior of titanium tubes is crucial for clarifying the causes of shrinkage cavities and porosity defects in titanium tubes.
The solidification shrinkage of titanium tubes is influenced by multiple factors, among which alloying elements, mold materials, and mold structure are key factors. Alloying elements affect the crystallization temperature range of titanium tubes, similar to their influence on the fluidity of titanium tubes. The solidification shrinkage characteristics of titanium tubes primarily depend on the characteristics of the added alloying elements. Specifically, they are closely related to the crystallization temperature gap between titanium and the alloying elements.
Titanium tubes with different crystallization temperature gaps exhibit varying solidification shrinkage behaviors. Eutectic titanium tubes with narrow crystallization temperature gaps exhibit excellent fluidity and are more likely to form concentrated shrinkage cavities during solidification. Titanium tubes with wide crystallization temperature gaps, on the other hand, exhibit relatively poor fluidity and are more likely to form dispersed shrinkage cavities, also known as shrinkage porosity, during solidification.
Titanium tubes, with their excellent range of physical properties, have become an excellent structural material, competing fiercely with stainless steel and nickel alloys for application in numerous fields. The application of titanium tubes has brought significant changes to numerous sectors of the national economy. The use of titanium tubes has extended product lifespans, improved equipment reliability and productivity, accelerated processes, and improved working conditions. These positive impacts ultimately translate into significant economic benefits, further highlighting the importance and application value of titanium tubes in the industrial sector.
The company boasts leading domestic titanium processing production lines, including:
German-imported precision titanium tube production line (annual production capacity: 30,000 tons);
Japanese-technology titanium foil rolling line (thinnest to 6μm);
Fully automated titanium rod continuous extrusion line;
Intelligent titanium plate and strip finishing mill;
The MES system enables digital control and management of the entire production process, achieving product dimensional accuracy of ±0.01μm.
