Titanium and titanium alloy are emerging structural and functional materials, with high specific gravity strength ratio, low thermal expansion coefficient, good corrosion resistance, high temperature performance, low temperature toughness and low temperature superconductivity and many other advantages. In recent years, in aerospace, military industry and chemical industry, petroleum, Marine, sports and other civilian fields have been widely used, known as the "third metal" after iron, aluminum, also known as "space metal", "ocean metal".
The manufacturing method of pure titanium seamless tube is characterized by the following steps: preparing the tube billet bar; Tube bar machining; Cross rolling punch: The billet was heated to 700-980 ℃, and perforated for 1 ~ 2 times by a two-high skew mill. Molybdenum head or water-cooled head was used. The dip Angle of the perforated roll was 8° and the roll revolution was 40-90 base speed ~ 195r/min. The outer diameter of the pipe is φ72 ~ φ125mm, the wall thickness is 5 ~ 20mm, and the length is 1500 ~ 6000mm. Cold rolling; Heat treatment, performance inspection and storage of finished products. The invention has the characteristics of high production efficiency, low production cost, high finished material rate, short production cycle, low equipment investment cost and good product quality, etc. The quality of the pure titanium tube is good, and the mechanical properties are in line with the national requirements, which can meet the needs of large-scale industrial production.
The manufacturing process is mainly as follows: rolling (forging) bar a sawing core a turning light a heating a diagonal rolling punch a grinding a cold rolling a degreasing a annealing a pickling a straightening a cold rolling (circulating to the finished product) a heat treatment of the finished product a pickling a straightening a flaw detection a cleaning a inspection and storage.
Two batches of products are Φ25Χ1.5πιπι. The surface quality of the pure titanium pipes manufactured by the method is good and all the mechanical properties are in line with the requirements.
