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Titanium has plasticity. The high-purity titanium has an elongation of 50 to 60% and a reduction in area of 70 to 80%. Despite the low strength of high-purity titanium, pure industrial titanium contains a small amount of impurities and the addition of alloying elements can significantly enhance its mechanical properties, making its strength comparable to high strength. This means that industrial pure titanium tubes, as long as they contain a small amount of interstitial impurities and other metal impurities, can have both high strength and proper plasticity. The specific strength (strength to weight ratio) of industrial pure titanium tubes is very high in metal structural materials, and its strength is comparable to steel, but its weight is only 57% of steel. In addition, the titanium tube is highly heat resistant and maintains good strength and stability in an atmosphere of 500 °C. The titanium tube also has good low temperature resistance, and even at an ultra-low temperature of -250°C, it has high impact strength and can withstand high pressure and vibration. Another remarkable feature of the industrial pure titanium tube is its high corrosion resistance. This is because it has a particularly high affinity for oxygen and can form a dense oxide film on the surface to protect the titanium from the medium. Therefore, titanium has excellent stability in acidic, basic, neutral salt aqueous solutions and oxidizing media, and is superior in corrosion resistance to existing stainless steels and other non-ferrous metals. Industrial pure titanium tubes are widely used. At present, industrial pure titanium tubes are not only used in aerospace and aviation industries, but also widely used in many industrial sectors such as chemical, petroleum, light industry and power generation. Because pure industrial titanium tube has many excellent characteristics such as light weight, high strength, strong heat resistance and corrosion resistance, it is known as “the metal of the future” and is a new type of structural material with great development prospects.
Titanium can be subjected to various pressure processing such as forging, rolling, extrusion, stamping, etc. In principle, the equipment used for heating steel can be used for heating titanium, and the atmosphere in the furnace is required to maintain a neutral or weak oxidizing atmosphere. Heated with hydrogen.
Titanium has a higher yield ratio, generally between 0.70 and 0.95, and the deformation resistance is large, while the elastic modulus of titanium is relatively low. Therefore, titanium is difficult to process. Pure titanium has good welding properties, and the weld strength, ductility and corrosion resistance are similar to those of the base metal. In order to prevent contamination during welding, tungsten argon shielded welding is required.
The cutting process of titanium is difficult. The main reason is that the friction coefficient of titanium is large, the thermal conductivity is poor, and the heat is mainly concentrated on the tip of the blade, so that the tip is softened quickly. At the same time, the chemical activity of titanium is high, and the temperature rises to easily adhere to the tool, resulting in bond wear. When cutting, the tool material should be properly selected to keep the tool sharp and use a good cooling process.