Introduction
Titanium and titanium alloys are becoming increasingly important materials in naval and aeronautical engineering and nuclear engineering. As one of the important materials in the industrial and national defense industries, the research and development of casting technology of titanium and titanium alloys has become more and more popular, and the development of casting methods and processes has been making great progress.
Titanium and titanium alloys are metal materials with good comprehensive mechanical properties, excellent corrosion resistance and high specific strength. Used in aerospace, electronics, electro-optical, chemical and other fields, they are also extremely important basic materials. Titanium has low density and high specific strength, is not affected by high temperature oxidation corrosion, and is not affected by sea erosion and corrosion. Its mechanical properties are excellent and commensurate with the characteristics of the metal material. It is the preferred material for small, high-speed aircraft and small, high-powered ships.
Application
Titanium and titanium alloy castings are widely used in military, civilian and other fields.
First. Military field:
1. Missile components: missiles have strict requirements for their alloy castings in terms of strength, heat resistance, wear resistance and dimensional accuracy.
2. Aerospace parts: the aerospace field requires titanium and titanium alloys castings with good fluidity, low gas content (or no gas), high impact toughness and good dimensional accuracy.
Second, Civilian field:
1. Medical equipment: such as titanium alloy artificial heart, hip replacement, and so on.
2. Industrial production, agricultural production and so on
3. Sport and leisure industry: Titanium alloy frames, sports car frames, and a variety of sporting goods.
Advantages
Titanium and titanium alloys have the following advantages over other materials:
1. Light weight: The density of titanium and titanium alloys is about 4.5g/cm2. Comparing with other metal materials such as stainless steel, copper, aluminum and steel, its density is much lower, which has a remarkable advantage in terms of weight and transportation.
2. Good corrosion resistance: Titanium and its alloys have excellent corrosion resistance in the atmosphere, water, sea water, alkali, organic acid and salt water environment.
3. High temperature resistance: Titanium and its alloys have good plasticity and can maintain good mechanical properties under high temperature environment.
4. Good heat transfer performance: Titanium and its alloys have good thermal conductivity, which improves the process efficiency and saves energy.
5. Nonmagnetic: Titanium and its alloys are nonmagnetic and are the preferred materials for making parts with magnetic shielding effect.
Standards
Generally speaking, the standards for titanium and titanium alloy castings are mainly JB/T 6381-2007 titanium and titanium alloy castings and GB 6614-86 titanium and titanium alloy castings.
Conclusion
Titanium and titanium alloys have superior comprehensive performance compared with metal materials such as stainless steel, alloy steel and aluminum alloy, are widely used in many fields such as aerospace and medical equipment, so it is necessary to carry out the corresponding technical research and development to promote the use and development of titanium and titanium alloys.
