The largest diameter high-strength titanium alloy seamless elbow in China was successfully developed

On August 12, the Eighth Research Room of the 725th Institute successfully developed the largest domestic titanium alloy seamless pipe 2.5D elbow, with the sample size reaching φ690*20mm. After inspection, the sample size and performance met the design indicators and reached the leading level in China. The successful development of this elbow product has achieved a full range of breakthroughs in the technology of medium and high strength titanium alloy seamless pipe fittings, and enhanced the core competitiveness of the 725th Institute in titanium alloy seamless pipe fittings.

In order to solve the problem of precision forming of medium and high strength titanium alloy seamless pipe fittings in ship seawater pipelines, the Eighth Research Room established a Party member assault team for the development of medium and high strength titanium alloy pipe fittings. Focusing on the development needs of ship seawater pipeline systems, the Eighth Research Room adopted multi-pass forming process simulation of pipe fittings, hot forming process tests and other means, and focused on the high temperature forming technology of a number of titanium alloy complex structural parts, solving the industry problems such as narrow forming process window and complex high temperature rheological behavior of titanium alloy pipe fittings, and successfully independently developed a series of medium and high strength titanium alloy seamless elbows, reducers, tees and other pipe fittings, filling the domestic technical gap.

In the next step, the 725th Institute will conduct in-depth research on low-cost forming of titanium alloy pipe accessories, improvement of supporting application technology and assessment and evaluation, and build a complete technical system. Seize the new opportunities of the new round of scientific and technological revolution and industrial development, carry out basic and cutting-edge technology research, adhere to scientific and technological innovation, self-reliance and self-improvement, and promote the large-scale development of ship titanium alloy technology.