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What problems still exist in titanium alloy?

Titanium alloy has the advantages of light weight, high specific strength and good corrosion resistance, so it is widely used in the automobile industry. There are many advantages in making engine parts from titanium alloys.

The low density of titanium alloy can reduce the inertia mass of moving parts, while the titanium valve spring can increase the free vibration, weaken the body vibration, improve the engine speed and output power.

Reduce the inertia mass of moving parts, thus reducing the friction and improving the fuel efficiency of the engine. The choice of titanium alloy can reduce the load stress of the relevant parts, reduce the size of the parts, so as to reduce the quality of the engine and the vehicle. The reduction of the inertia mass of the parts reduces the vibration and noise and improves the performance of the engine. The application of titanium alloy in other parts can improve the comfort of people and the aesthetics of cars. In the application of automobile industry, titanium alloy plays an immeasurable role in energy saving and consumption reduction.

Although titanium alloy parts have such superior performance, there is still a long way to go before titanium and its alloys are widely used in the automobile industry. The main reason that hinders the general application of titanium alloy in automobile industry is the high cost. The price of titanium alloy is much higher than that of other metals in both initial smelting and subsequent processing. The cost of titanium parts acceptable to the automotive industry is $8 ~ $13 /kg for connecting rods, $13 ~ $20 /kg for air valves, and $8 ~ $8 /kg for springs, engine exhaust systems, and fasteners. It is 6 ~ 15 times of aluminum sheet and 45 ~ 83 times of steel sheet.
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