Aircraft carrier is a symbol of a country’s overseas national strength. It not only represents a country’s comprehensive military strength, but also reflects a country’s comprehensive national strength. The real thing is a “toy” that can only be played by a big country.
At present, the largest surface warship in the world is also very expensive. For example, the cost of the U.S. Ford class aircraft carrier is close to 10 billion dollars. Where is the high cost of the aircraft carrier?
Due to the special environment of the aircraft carrier, there are special requirements for the steel used in the construction of the aircraft carrier. Because the aircraft carrier is connected in sections, it needs a large number of connecting mechanical parts rivets and screws to connect in sections, which requires countless bolts to fix it. In order to meet the requirements of various performance of the aircraft carrier, most of the screws on the aircraft carrier are made of titanium alloy, which is made of titanium alloy The screws are widely used in aerospace and surface ships. They are the most basic and indispensable parts of modern military equipment.
Aircraft carrier Titanium bolt requirements
When the aircraft carrier has been driving in the ocean for a long time, it has high requirements for bolts in the face of seawater corrosion, two-stage equator, marine natural disasters and non-magnetic requirements. Unlike ordinary bolts, ordinary bolts can not meet the requirements of marine corrosiveness, impact resistance and high temperature resistance. Moreover, the fatal defect of ordinary bolts is that they are magnetic, which will form magnetism for a long time The field interferes with normal operation of aircraft carrier.
Titanium alloy bolts can meet the special requirements of aircraft carrier, which is an important reason for the use of titanium alloy in aircraft carrier screws.
Titanium alloy has four advantages over other types of steel
- The weight of titanium alloy is only 57% of that of steel, which can greatly reduce the weight of aircraft carrier, save more fuel and improve the flexibility of ship at sea.
- The corrosion resistance of titanium alloy is more than three times stronger than that of steel, especially the resistance to chloride ion, which can greatly guarantee the safety of the hull.
- Titanium alloy material is non-magnetic and used on aircraft carrier, which is conducive to absorbing radar wave, playing a certain role in stealth, not easily detected by enemy, and avoiding the formation of strike force on aircraft carrier in advance.
Titanium alloy has strong resistance capacity. The holes connecting bolts or rivets on the aircraft carrier can only be drilled at certain positions after technical verification. Each hole must bear more force or torque, which will be borne by the bolts finally.
Manufacturing difficulty of titanium alloy bolt
Generally, bolts need to be processed in batches, but titanium material is very difficult to process, manufacturing is very difficult, and the scrap rate of batch manufacturing is very high. The machine tools and cutting tools used for processing are strictly required, and the failure of both standards can affect the accuracy of bolts.
Bolts are widely distributed on aircraft carriers, and the technical requirements for bolts in various parts are different. When choosing the cutting tool material for cutting titanium alloy, it is required to have high variable strength, high hardness, good toughness, good thermal hardness, good wear resistance, and good heat dissipation. Moreover, it is not allowed to use the cutting tool material containing titanium, because the cutting tool material containing titanium is easy to be compatible with titanium alloy under high temperature, which intensifies the cutting tool Wear.
This Article is from Baoji HOSN Titanium Co., Ltd.