Important factors in the solidification shrinkage of titanium tubes

When the world started to produce titanium tube parts, it used to have a lot of trouble. Mainly for aluminum tube parts familiar with the rice gold workers and technicians, but the titanium tube forming is very uncomfortable. First of all, the material cutting edge process because of the scissors edge wear too fast old to become intolerable school shape when the hammer head is very easy to proud of the coarse, knock repair process of the bell pops back very high, the parts, molds and dies on the hammering marks are still not able to make the parts stick to the mold on the model. Because of this everyone called titanium difficult to form materials, industry personnel said it is hot forming materials, which is a more general and emotional evaluation of the forming properties of titanium tubes. However, this does not affect the people of its specific folding, when the understanding of its characteristics, in order to make the appropriate treatment.

Precisely titanium not only rebound particularly large disadvantages, but also has very significant advantages such as in 1970 in the pure titanium tube room temperature deepening test had successfully processed the limit of the deepening coefficient of 2.75 of the cylinder, greatly exceeding the factory steel, steel and aluminum and other thick material records. As early as 10 years ago the test achieved better results, but also with conventional deep-drawing models and other materials, with a process to process the height of more than the radius of the spherical pieces. The foundation was laid for the development of our present titanium industry.
Ships are sure to corrode in seawater, seriously affecting their life span. Then improve the corrosion resistance of the hull, become the goal of many shipbuilding enterprises. Then what should be chosen to come to it? If the flow rate in the hull cooling water pipe is relatively high, and need to withstand strong impact and corrosion, you should choose titanium tube comparison. Although the performance of titanium pipe is quite superior, but its price is also extraordinarily expensive, which also brings trouble to shipbuilders.

Titanium tube is similar to other metals, the casting of titanium tube shrinkage behavior also experienced from the liquid state to the solidified state and then to the solid state of the change, usually this shrinkage behavior is divided into the body shrinkage and line shrinkage. Body shrinkage reflects the change of the entire volume of titanium tube casting process, as the total volume of body shrinkage is equal to the volume of the casting concentrated shrinkage plus the volume of the shrinkage, so to the alloy casting process of solidification shrinkage behavior is related to the alloy's body shrinkage, determines the drilling alloy shrinkage, shrinkage and loosening defects characteristics, for the understanding of titanium tube shrinkage shrinkage defects of the formation of the importance of the significance of the shrinkage defects.

Important factors affecting the solidification shrinkage of titanium tubes include alloying elements, casting material and casting structure. Since the alloying elements affect the crystallization temperature interval of titanium tubes, just as their effect on fluidity, the solidification shrinkage of titanium tubes depends firstly on the characteristics of the added alloying elements, i.e. the size of the crystallization temperature interval formed between titanium and the alloying elements. Eutectic titanium tubes with narrow crystallization temperature intervals have good mobility and are prone to form concentrated shrinkage, while titanium tubes with wide crystallization temperature intervals have poor mobility and are prone to form dispersed shrinkage, i.e., shrinkage.