Titanium alloy springs have advantages such as small volume, lightweight, excellent corrosion resistance, and fatigue resistance. Due to the higher shear modulus of titanium alloy materials compared to steel, the required number of bends is less than that of steel springs. Even if the specific gravity of the two materials is the same, titanium alloy springs are lighter than steel springs due to the use of fewer materials. In most cases, the weight of titanium alloy springs is 60% to 70% lighter than that of steel springs, and the height design of titanium alloy springs can also be reduced, which can be 50% to 80% lower than that of steel springs.
Another advantage of titanium alloy springs is their corrosion resistance. In the standard salt spray corrosion fatigue test, the fatigue life of general steel springs is reduced by 50% compared to in air. In the same experiment, the fatigue life of titanium springs decreased by only 4% compared to air. Moreover, unlike steel springs, titanium alloy springs do not require a protective coating.
Springs are a special type of component widely used in various fields of national production and life, such as automobiles, motorcycles, bicycles, and other vehicles. Springs are used in daily necessities such as computers, clocks, light switches, toys, and clips, mainly for shock absorption and energy storage.
In recent years, titanium alloys have become a new choice for spring materials due to their high specific strength, low elastic modulus, and good corrosion resistance. Compared with steel springs, titanium springs have the advantages of being lightweight, having small volumes, and high resonance frequency. Their density and elastic modulus are only half of those of steel springs, while their strength is almost the same as that of steel springs. Due to these advantages, titanium springs can be designed with smaller diameters, fewer turns, and significantly reduced weight compared to steel springs in practical applications.
As for springs, high strength is the most important performance requirement for materials, so high-strength β Titanium alloys, such as Ti-3Al-8V-6Cr-4Mo-4Zr and Timetal LCB (Ti-6.8Mo-4.5Fe-1.5Al) alloys, are ideal choices for manufacturing springs.
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