Advantages Of Titanium Tubes

1. The specific strength of titanium tube is high. The density of titanium alloy is generally about 4.5g/cm3, only 60% of steel, the strength of pure titanium is close to the strength of ordinary steel, and some high-strength titanium alloys exceed the strength of many alloy structural steel. Therefore, the specific strength (strength/density) of titanium alloy is much higher than that of other metal structural materials, and components with high unit strength, good rigidity and light weight can be produced. At present, titanium alloys are used in aircraft engine components, skeletons, skins, fasteners and landing gear.

2. Titanium tube has high thermal strength. The use temperature is several hundred degrees higher than that of aluminum alloy, and the required strength can still be maintained at moderate temperatures, and it can work for a long time at a temperature of 450 ~ 500 ° C. These two types of titanium alloys still have a high specific strength in the range of 150 ° C to 500 ° C, while the specific strength of aluminum alloys decreases significantly at 150 ° C. The operating temperature of titanium alloy can reach 500℃, and that of aluminum alloy is below 200℃.

3. Titanium tube has good corrosion resistance. Titanium alloy works in humid atmosphere and seawater medium, its corrosion resistance is much better than stainless steel; Resistance to pitting corrosion, acid corrosion, stress corrosion is particularly strong; Excellent corrosion resistance to alkali, chloride, chlorine, nitric acid, sulfuric acid, etc.

4. Titanium tube has good low temperature performance. Titanium alloy can still maintain its mechanical properties at low and ultra-low temperatures. Titanium alloys with good low temperature performance and very low gap elements, such as TA7, can maintain a certain plasticity at -253 ° C. Therefore, titanium alloy is also an important low-temperature structural material.

5. The chemical activity of titanium tube is large. Titanium has a large chemical activity and produces a strong chemical reaction with O, N, H, CO, CO2, water vapor, ammonia and so on in the atmosphere. When the carbon content is greater than 0.2%, hard TiC will be formed in titanium alloy; When the temperature is higher, TiN hard surface will be formed by the interaction with N. Above 600℃, titanium absorbs oxygen to form a hardened layer with high hardness; The embrittlement layer is also formed when the hydrogen content increases. The chemical affinity of titanium is also large, and it is easy to adhere to the friction surface.

6. Titanium tube has small thermal conductivity and small elastic modulus. The elastic modulus of titanium alloy is about 1/2 of steel, so its rigidity is poor, easy to deform, it is not suitable to make slender rods and thin-walled parts, and the amount of rebound of the machining surface during cutting is very large, about 2 to 3 times that of stainless steel, resulting in severe friction, adhesion and adhesive wear of the tool after the tool surface.