The titanium additive manufacturing technology of 3D printing is mainly used to generate 3D CAD model of parts in the computer. According to the size data of the model, the materials of parts are piled up layer by layer in the form of ink-jet to form 3D parts. Additive manufacturing technology is simple, low production cost, wide application range, according to the three-dimensional diagram of the parts in the computer at any time to change the structure of manufactured parts, varieties, etc., for products with complex structure, high material activity, high purity of metal parts manufacturing requirements is particularly applicable.
The raw materials used in 3D printing additive manufacturing technology are mainly metal and non-metal, and other materials are added to the raw materials for sintering, curing and hot cladding. According to the different additive manufacturing technologies of additive materials, it can be divided into rapid prototype manufacturing technology and high-performance metal component direct manufacturing technology. Compared with traditional cutting processing, increase material manufacturing technology of metal parts can be finished manufacture process step is completed, the manufacturing process is according to the components of the three-dimensional CAD figure, so with the actual requirements of parts size accuracy, the subsequent machining allowance is small, material utilization and production efficiency are greatly improved. When using additive manufacturing technology, large equipment is not required, which can save resources for production enterprises. Meanwhile, the manufacturing time is short, with high flexibility, which can be changed at any time according to the structural changes of products.
With the development of 3D printing additive manufacturing technology, titanium alloy additive manufacturing technology will be applied in all aspects of engineering materials. The titanium alloy produced by additive manufacturing technology can completely replace the traditional titanium alloy material. With the progress of science and technology, the application scope of titanium alloy materials will not only be limited to aerospace, national defense and medical health, titanium alloy additive manufacturing technology will continue to improve and develop. The additive manufacturing technology of titanium alloy has just begun, and its development still needs continuous improvement and perfection, which requires the joint efforts of scientific research institutions and institutions. Titanium alloy additive manufacturing technology will develop towards the direction of production complexity, high precision, large scale and low cost. At the same time, additive manufacturing technology will be applied in various fields to realize rapid production, promote the rapid development of China's manufacturing industry, and greatly improve the speed of China's economic development.
(1) Application of titanium alloy additive manufacturing technology in aerospace field
Additive manufacturing technology was first applied to the carrier-borne fighter aircraft of the United States in 2001, and the bearing structure of aircraft was produced through titanium alloy additive manufacturing technology and applied to aviation production. In 2011, the University of Southampton in the United Kingdom used additive manufacturing technology to produce an integral frame that includes the wings, control panels and doors of the drone. 2012 years later, the titanium alloy material manufacturing technology in the field of aviation applications have made unprecedented development, the titanium alloy parts is not only widely used in aircraft manufacturing, and new titanium alloy material to the rockets, the space shuttle has been applied in aerospace equipment, such as titanium alloy material manufacturing technology for increasing production of parts can reduce greatly the weld number between space equipment, because the strength of titanium alloy is higher, the safety of the device makes the space is greatly increased. Relevant departments and scientific research institutes in China have also been studying the additive manufacturing technology of titanium alloy, which has been applied in the field of aviation. In China, the aircraft wing and main load-bearing components produced by titanium alloy additive manufacturing technology meet the corresponding technical requirements and are applied in aircraft manufacturing. Beijing university of aeronautics and astronautics in 2013 passed the increase of material manufacturing technology to produce the titanium alloy titanium alloy aircraft main bearing component, passed the technical authentication and installed review, which makes our country become the world's first master the titanium alloy aircraft design and manufacture of the main bearing components, marked the our country of the titanium alloy material manufacturing technology in the world leading position.
(2) Application of titanium alloy additive manufacturing technology in the field of national defense
In the process of national defense weapon production, the material performance of the weapon is required to be higher and the precision of the parts is also required to be higher. The U.S. Navy is studying the design of additive manufacturing technology to aircraft carriers as a large weapons production plant to produce the required weapons and equipment as needed and required. At the same time, the U.S. Army is also developing "mobile parts hospitals" to enable the rapid repair and production of weapon parts to meet the needs of the battlefield. China is also stepping up the research on the application of titanium alloy additive manufacturing technology in the field of national defense, so as to realize the rapid and precise production of weapons and promote the development of national defense technology.
(3) Application of titanium alloy additive manufacturing technology in medical devices
In modern medicine, titanium alloy technology has been used, such as artificial joints. With the improvement of medical level, people have put forward higher requirements for the application of artificial joints or other composite materials in the body. These materials applied to the human body should have better contact and compatibility, and at the same time complete the corresponding functions. The artificial joint produced by additive manufacturing technology of titanium alloy ensures that the joint has a good wear-resisting interface and can be compatible with bone tissue, which can improve the quality and medical level of the artificial joint.
At present, titanium alloy products have been applied in many fields. The structure of these products is more complex, with many varieties, small batch and high performance requirements. Traditional manufacturing technology cannot meet the requirements of these products, but additive manufacturing technology can meet the manufacturing technology and performance requirements of titanium alloy products, so it has been widely used.