Titanium and titanium alloys have excellent properties such as good corrosion resistance, good biocompatibility, high specific strength and fatigue strength, and enjoy the reputation of "strategic metal", "space metal", "ocean metal" and "biological metal". In recent years, titanium and titanium alloy technology have been widely used in petroleum energy industry, metallurgical industry, shipbuilding industry, automobile industry, aerospace, food, medical equipment and other projects. The field with the greatest development potential is the aerospace field, which can be used for aircraft fastening Parts, engine parts, wings, aircraft landing gear, and airborne equipment can also be used in high-end military equipment such as rockets, artificial satellites, conduction, and tanks, thereby improving the performance of the equipment.
After nearly ten years of technical research on titanium and titanium alloy composite materials, many products have been widely used. The reasons for the rapid growth of titanium and titanium alloy production: on the one hand, the development of precision-processing near-forming manufacturing technology solves the problem of difficult processing of titanium and titanium alloys in α-state and β-state, improves the utilization rate of raw materials, and reduces costs . For example, the preparation of titanium alloy parts by hot isostatic pressing can not only eliminate the internal defects of titanium alloys, improve the mechanical properties of materials, but also reduce the production costs of materials, which further promotes the application of titanium and titanium alloys in the aerospace field. Porous composite materials of titanium and titanium alloys are prepared by injection molding technology, and their elastic modulus is similar to that of human bones, which promotes the application of titanium and titanium alloys in the field of biomedicine.
At home and abroad, the research on titanium and titanium alloy materials is mainly focused on biological titanium alloys, military high-temperature titanium alloys, high-strength and high-toughness β-type titanium alloys, and titanium and titanium alloy composite materials.
From the perspective of the development of titanium and titanium alloys, it is of great significance to develop new alloy components, solve technical and process problems in the preparation process of titanium alloy materials, and expand new application fields. Titanium and titanium alloys are not only used in traditional aerospace and marine engineering fields, but also in civilian fields such as automobiles, medical equipment, and sports.
At present, the development trend of the application prospect of my country's titanium and titanium alloy processing products industry should work in the following directions:
(1) For casting titanium and titanium alloys, the stability of their properties should be improved to eliminate segregation; a new joint titanium alloy casting technology should be developed to develop high-strength titanium alloy castings to make them more widely used.
(2) The development of titanium and
titanium alloy tube should be developed in the direction of high performance and low cost. Use finite element software to simulate the process and establish a database of material properties and process parameters to develop high-performance titanium and titanium alloy pipes. Provide theoretical basis and data support.
(3) For titanium and titanium alloy composite materials, research on powder adhesives and lubricants should be strengthened; development of composite forming technologies, such as injection molding + HIP, laser technology + mold forming technology, etc. Then develop high-quality, high-precision titanium and titanium alloy composite materials that meet the needs of modern society; at the same time, use computer technology, additive technology and other new technologies to develop more advanced powder forming technology to prepare high-quality, high-performance Titanium and titanium alloy composites.
(4) For high-temperature titanium alloy materials, the research on the size, shape and content ratio of α, β, silicide and α2 phases should be strengthened to improve the microstructure stability of high-temperature titanium alloys, and establish aging temperature, aging time and other heat treatment conditions for each phase. The finite element model of the size, distribution, shape and content changes of the high-temperature titanium alloy determines the critical transformation value of the α2 phase size and content that balances thermal strength and thermal stability, and improves theoretical support for the development of high-performance high-temperature titanium alloy materials.
