Titanium tubing is a new metal material that has completely replaced traditional iron and steel tubing in some ways. So what makes it a quick replacement for traditional tubes?
How many advantages are there for titanium tubes?
1. Titanium pipe has a high specific strength. Titanium alloy density is generally around 4.5g/cm3, only 60% of steel, pure titanium strength 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 of titanium alloy (strength/density) is much greater than other metal structural materials and can produce units of high strength, good rigidity, and lightweight parts and components. At present, the aircraft engine components, skeleton, skin, fasteners, landing gear, etc. use titanium alloy.
2. Titanium tubes have high thermal strength. The use of temperature than the aluminum alloy a few hundred degrees higher in the medium temperature can still maintain the required strength, which can be in the temperature of 450-500 ℃ long-term work of these two types of titanium alloys in the range of 150 ℃ to 500 ℃ still have a high specific strength, and aluminum alloy at 150 ℃ than the strength of the obvious decline. The working temperature of titanium alloy can reach 500 ℃, aluminum alloy is below 200 ℃.
3. Titanium tube has good corrosion resistance. Titanium alloy in the humid atmosphere and seawater media work, its corrosion resistance is far better than stainless steel; pitting, acid corrosion, and stress corrosion resistance is particularly strong; alkali, chloride, chlorine organic items, nitric acid, sulfuric acid, etc. have excellent corrosion resistance. But titanium has a reduced oxygen and chromium salt media corrosion resistance is poor.
4. Titanium tube has good low-temperature performance. Titanium alloy in low temperature and ultra-low temperature, can still maintain its mechanical properties. Good low-temperature performance, the gap element is a very low titanium alloy, such as TA7, in -253 ℃ can also maintain a certain degree of plasticity. Therefore, titanium alloy is also an important low-temperature structural material.
5. The chemical activity of the titanium tube is large. Titanium’s chemical activity, and the atmosphere O, N, H, CO, CO2, water vapor, ammonia, and other strong chemical reactions. Carbon content greater than 0.2%, will form a hard TiC in titanium alloys; higher temperatures, and the role of N will also form a hard surface layer of TiN; above 600 ℃, titanium absorbs oxygen to form a hardened layer of high hardness; hydrogen content rises, but also the formation of embrittlement layer. Titanium’s chemical affinity is also large, easy to produce an adhesion phenomenon with the friction surface.
6. Titanium tubing has a small thermal conductivity and a small modulus of elasticity. Titanium’s thermal conductivity is small, The small modulus of elasticity of titanium alloy modulus of elasticity is about 1/2 of steel, so its rigidity is poor, easy to deform, and not suitable for the production of slender rods and thin-walled parts, cutting the machining surface of the rebound is very large, about 2-3 times the stainless steel, resulting in sharp friction, adhesion, and bonding wear on the back face of the tool.
