GR5 titanium plate and titanium alloy has a small density, high specific strength, high flexural strength ratio, good plastic toughness, titanium's thermal conductivity is small, elongation and other characteristics. Titanium stability is too good, it is difficult to develop smelting, and even brought to use, so we do not see much nature will think so, in fact, titanium reserves occupy 0.6% of the region, occupying the ninth place, the reserves are very large. Titanium's activity is very low depends on the situation, titanium is very stable at room temperature in the air, not easy to have any reaction, but at high temperatures in the chemical activity is very strong, can easily and a lot of gases to produce a reaction. Titanium is a metal, thermal conductivity is naturally not slow, but relatively slower than some of our common metals, from the current data, titanium's thermal conductivity and stainless steel is relatively close to about one-fourteenth of aluminum, about one-fifth of iron, in the automotive industry has a lot of potential for use.
Titanium plate in the naval industry, the main use of its excellent corrosion resistance, as well as low density, memory, non-magnetic and so on. Titanium and titanium alloys are widely used in nuclear submarines, deep submersibles, atomic energy icebreakers, hydrofoils, hovercraft, minesweepers, as well as propeller thrusters, whip antennas, seawater piping, condensers, heat exchangers, acoustic devices, firefighting equipment, and so on. The main applications of titanium alloys are: industrial pure titanium, Ti-SARV, Ti-6A1-4VELKTi-6Al-2Nb-Ta-0.8Mo, Ti-3AI-2.5V, and Ti-3B (Ti-4A1-2V), nT-7M (Ti-2Al-2.5Zr).
(1) All-titanium boats.F1This company has good practical experience in manufacturing titanium boats.In the 1990s, Toho Titanium, Nissen Kogyo, Fujishin Shipbuilding, Edo Shipbuilding, and others built all-titanium fishing boats or speedboats. The advantages of all-titanium boats are light weight, high speed, small engine, low fuel cost, low carbon dioxide emissions, no surface coating, easy to clean up adhesions, etc. The disadvantages are the high cost of materials, processing and manufacturing technology difficulties, and strict protection requirements. The results of the test ship show that the ship speed stability vibration and noise and other performance are very good.
(2) atomic power ship. Russia's use of titanium alloy instead of stainless steel manufacturing ship's steam engines, heat exchangers, coolers. Overcome the corrosion damage. Russia's existing atomic power icebreaker power plant widely used titanium steam engines. The use of titanium alloys can extend the service life of its engines more than 10 times.
(3) propeller. Propeller materials require high strength, fatigue performance in seawater medium, good resistance to scouring and air bubble corrosion. Titanium alloy can meet the above comprehensive performance requirements. The U.S. Navy first hydrofoil boat on the use of 1500mm in diameter, four-bladed detachable ultra-cavitation bubble titanium alloy propeller. China in 1972 developed into a hydrofoil propeller. So far has produced a diameter of 450-1700mm various types of titanium propellers, M can produce a diameter of 1200mm, the quality of 130kg fixed titanium propellers. Long-term use shows that the service life of titanium alloy propeller more than 5 times the copper alloy propeller.
(4) ship pumps, valves and pipe systems. Ship's pumps, valves and tubes, due to the working conditions are very poor, the use of copper, stainless steel manufacturing pipeline only 2-5 years of life, after the replacement of titanium alloy after a good effect, suitable for high-flow rate of dynamic seawater pipeline. Russia's ship pipeline life standards set out three years of requirements, that is, the first time into the dockyard maintenance period of 8-9 years; service life should be not less than 15 years; full-life requirements of all classes of ships should be in the period of 25-30 years of reliable operation.
