How does the shrinkage behavior of titanium tubes change?

Similar to other metals, the shrinkage behavior of titanium tube during casting also experiences changes from liquid state to solidification state and then to solid state, which is usually divided into bulk shrinkage and linear shrinkage. Body contraction reflects the titanium tube in the process of casting the entire volume change, due to the overall body is equal to the casting shrinkage focused the volume of the volume of shrinkage cavity and shrinkage, therefore to alloy casting process is associated with the body contraction of alloy solidification shrinkage behavior, determine the shrinkage cavity, shrinkage porosity defect features of titanium alloys for understanding the formation of shrinkage defects of titanium pipe shrinkage is of great significance.

The important factors affecting the solidification and shrinkage of titanium tubes include alloying elements, casting material and casting structure. As alloying elements affect the crystallization temperature interval of titanium tubes, just as they affect the fluidity, the solidification shrinkage of titanium tubes depends first on the characteristics of the alloying elements added, that is, the size of the crystallization temperature interval formed between titanium and alloying elements. Eutectic titanium tubes with narrow crystallization temperature intervals have good fluidity and are prone to form concentrated shrinkage pores, while titanium tubes with wide crystallization temperature intervals have poor fluidity and are prone to form dispersed shrinkage pores, namely shrinkage porosity.

As an excellent structural material, titanium tubes compete with stainless steel and nickel alloys for applications due to a range of excellent physical properties: In many sectors of the national economy, due to the use of titanium tubes, improve product life, improve the reliability and productivity of equipment, speed up the process, improve the working conditions, all these, have obtained significant economic benefits.