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How does the contraction behavior of titanium tube change?

Titanium tube is similar to other metals. The shrinkage behavior of titanium tube during casting also changes from liquid state to solidified state and then to solid state. This shrinkage behavior is usually divided into volume shrinkage and linear shrinkage. The volume shrinkage reflects the change of the whole volume in the process of titanium tube casting. Because the total volume shrinkage is equal to the volume of concentrated shrinkage hole and shrinkage volume of casting, the solidification shrinkage behavior in the process of alloy casting is related to the volume shrinkage of alloy, which determines the characteristics of shrinkage hole and shrinkage defect of titanium alloy. It is of great significance for understanding the formation of shrinkage hole and shrinkage defect of titanium tube.

The important factors affecting the solidification shrinkage of titanium tube include alloy element, casting material and casting structure. As alloying elements affect the crystallization temperature interval of titanium tube, the solidification shrinkage of titanium tube depends first on the characteristics of alloying elements, that is, the size of the crystallization temperature interval formed between titanium and alloyed elements. Eutectic titanium tube with narrow crystallization temperature interval has good fluidity and is easy to form concentrated shrinkage pores, while titanium tube with wide crystallization temperature interval has poor fluidity and is easy to form dispersed shrinkage pores, that is, shrinkage porosity.

Because titanium tube has a series of good physical properties, as an excellent structural material, it can compete with stainless steel, nickel alloy application range: In many sectors of the national economy, because of the use of titanium tube, improve the product life, improve the reliability and productivity of equipment, accelerate the process, improve the working conditions, all these, have obtained significant economic benefits.