Why is titanium alloy slingshot expensive?

Titanium alloy slingshots are expensive because of the high smelting standard of titanium.

The main limitation of titanium and titanium alloys is their poor chemical reactivity with other materials at high temperature. This characteristic forces titanium alloy to be different from traditional refining, melting and casting processes, and even often causes mold damage; Therefore, the price of titanium alloy becomes very expensive. So at first, it was mostly used in aircraft structure, aircraft, and high-tech industries such as petroleum and chemical industry.

With the development of aerospace science and technology and the improvement of people's quality of life, titanium alloys are gradually used to make people's livelihood products and benefit people's lives. However, the prices of these products are still high, and most of them belong to high-priced products, which is the biggest fatal injury that titanium alloys cannot carry forward.

Advantages of titanium alloy slingshot:

1. Low density and high specific strength.

The density of metallic titanium is 4.5 1g/cm3, which is higher than aluminum and lower than steel, copper and nickel, but its specific strength is the first among metals.

Second, corrosion resistance.

Titanium is a very active metal, its equilibrium potential is very low, and it has a great tendency of thermodynamic corrosion in the medium. But in fact, titanium is very stable in many media, for example, titanium is corrosion-resistant in oxidizing, neutral and weakly reducing media. This is because titanium and oxygen have great affinity. In air or oxygen-containing medium, a dense, adhesive and inert oxide film is formed on the surface of titanium to protect the titanium substrate from corrosion.

Third, it has good heat resistance.

The new titanium alloy can be used for a long time at 600℃ or higher.

4. Good low temperature resistance.

The strength of some low-temperature titanium alloys increases with the decrease of temperature, but the plasticity changes little. Keep good ductility and toughness at the low temperature of-196-253℃, and avoid the cold brittleness of metal. It is an ideal material for cryogenic containers, storage tanks and other equipment.

5. Strong damping resistance.

After mechanical vibration and electrical vibration, the vibration attenuation time of titanium is longer than that of steel and copper. This property of titanium can be used as tuning fork, vibration element of medical ultrasonic pulverizer and diaphragm of advanced audio speaker.

Six, non-magnetic, non-toxic

Titanium is a non-magnetic metal and will not be magnetized in a very large magnetic field. It is non-toxic and has good compatibility with human tissues and blood, so it is adopted by the medical community.

Seven, the tensile strength is close to its yield strength.

This property of titanium shows that its yield ratio (tensile strength/yield strength) is high, which shows that the plastic deformation of metallic titanium material is poor during forming. Because the ratio of yield limit to elastic modulus of titanium is large, titanium has great elasticity in the forming process.

Eight, good heat transfer performance

Although the thermal conductivity of metallic titanium is lower than that of carbon steel and copper, due to its excellent corrosion resistance, the wall thickness of titanium can be greatly reduced, and the heat exchange mode between the surface and steam is droplet condensation, which reduces the hot mass, reduces the thermal resistance and does not scale on the surface, which significantly improves the heat exchange performance of titanium.

Nine, low modulus of elasticity

The elastic modulus of titanium at room temperature is 106.4 MPa, which is 57% of that of steel.