Advantages of titanium bicycle frame

Titanium alloy is only 50% of the weight of steel, and the strength to weight ratio is 28.4% higher than chromium molybdenum steel. The fatigue limit of titanium alloy is twice that of steel, and aluminum alloy frame cannot be compared with titanium alloy frame in this respect after a long time. As a high strength and low density titanium alloy used in bicycle racks, it will not only make the frame lighter and stronger, but also make the frame more durable.

Titanium alloy is only 50% of the weight of steel, and the strength to weight ratio is 28.4% higher than chromium molybdenum steel. The fatigue limit of titanium alloy is twice that of steel, and aluminum alloy frame cannot be compared with titanium alloy frame in this respect after a long time. As a high strength and low density titanium alloy used in bicycle racks, it will not only make the frame lighter and stronger, but also make the frame more durable.

1, aluminum alloy frame performance

Aluminum is a material with low elasticity and rigidity. Its specific gravity is light but not hard enough. Many aluminum frames are made of 6061T6 materials. T6 mark indicates heat treatment and aging. Without heat treatment, the strength can only reach the level of 1/2, or 1/5. Generally, small plants cannot afford to buy heat treatment equipment. In addition, there are usually 7005 and 7075 aluminum alloy materials for the production of bicycle frame, 7005 alloy strength than 7075 alloy.

Aluminum itself is a very corrosion-prone metal, and the more times you ride a bicycle of this material, the more times the stress occurs, and the greater the change in strength. In recent years, in order to seek light weight, many vehicles use thin material to make (thin degree has reached the limit), its service life will be greatly affected.

2, chromium molybdenum steel frame performance

Chromium-molybdenum steel bicycle frame is the earliest bicycle frame material, its processing performance is good, welding is easy, the price is also relatively cheap, mainly used to produce low-grade bicycle frame. Its prominent disadvantage is easy to rust, metal fatigue is significant (stress concentration caused by metal fatigue), which affects the strength of the frame, when the metal fatigue reaches a certain degree, the frame may occur sudden destructive fracture.

3. Carbon fiber frame performance

Carbon fiber frame is characterized by "light, not bending, good impact absorption," but, to give full play to the excellent performance of carbon fiber, the technology does not look so easy, the quality of various carbon fiber manufacturers are also large differences. Bicycle makers are unlikely to use high-grade carbon fiber for their frames because of the cost.

Carbon fiber is what solidifies carbon fiber in resin. It is very light, but it is a directional material (strong tensile strength but weak shear strength). Therefore, the method of layering thin materials on top of each other is adopted to solve the disadvantage, which requires complex stress calculation during processing. Relative to the titanium alloy material, at the same time as an ideal material, the production of high-grade bicycle frame at present in the trend of the development of the market gradually become the mainstream of the production of high-grade frame, but the customer don't fully understand the performance of the material, we in the customer introduce titanium alloy material with carbon fiber material, should highlight the carbon fiber frame of the following questions:

(1) if the external force acting on the carbon fiber frame in the direction of a certain Angle with the fiber, its strength will be greatly reduced, easy to crack.

(2) the resin added in the curing and forming process of carbon fiber frame has the problem of aging, which will gradually affect the performance of the frame.

(3) carbon fiber frame is formed after mold curing, and the mold cost is quite high, so the factory cannot provide customized service for customers.

(4) after the carbon fiber is formed into a frame, if it breaks, it cannot be repaired.

4, titanium alloy frame advantage

(1) the strength and weight ratio of titanium alloy vehicle frame of aero company is more than 75% higher than that of steel and aluminum vehicle frame.

(2) the fatigue life of liner's titanium alloy frame is five times longer than that of steel frame and aluminum frame, which means it will accompany you for a long time.

(3) each frame design, we strive to show the unique product charm of titanium alloy frame, pay attention to the perfect combination of beauty, lightweight and strength design.

(4) after a five-hour bike ride, you will enjoy the titanium frame more when you feel the vibration and impact from the road more directly through the frame.

(5) its super corrosion resistance, with a long life titanium alloy is the use of high performance materials in aerospace products, with excellent metal material performance, is currently internationally recognized production of various kinds of competition and leisure high-grade bicycle the most advanced, the most ideal material.

5. Advantages of titanium alloy frame

(1) it can make light weight and strong frame with higher strength of pure titanium metal. The addition of aluminum and vanadium to titanium metal provides a higher elasticity (compared to aluminum) and is beneficial to the design

(2) no rust: titanium is almost impervious to corrosion under normal conditions. But it has another corrosion phenomenon which is dissimilar metal corrosion.

For example, when different kinds of alloys are joined together, they become an electrode state. The solution to this phenomenon is to insulate it with creams, etc. (creams mixed with metal powders, e.g., Ti Plepu, etc.). The metal powder prevents the paste from running off and even after it has run off it is used to prevent close contact. It does not matter that the metal powder has conductivity, which is destroyed by a small load upon contact. This phenomenon is called "sticking," which is different from baking.

"Sticking" : the joining of metals by corrosion.

"Bake joint" : the heat produced by working metal to melt the joint.

(3) ride a feeling good

Titanium is also used in shock absorber springs. Titanium frames are now suitable for long rides. Some riders have a passion for titanium frames and think riding is great. But the individual is different, and some people and chromium molybdenum steel after comparison, chromium molybdenum steel frame impact absorption than titanium frame, ride better than titanium frame (this is related to the shape of chromium molybdenum steel frame and thin tube results in increased stress). If the titanium tube processing technology is further improved, it may have the same ride and chromium molybdenum steel.

Some titanium frame to make the person feels swing, this perhaps is the use of plane tube (no add padded, tube thickness can not change). Or although the use of high strength titanium alloy, but did not use thin tube, etc.

6, titanium alloy frame shortcomings

Price is high

Titanium exists in nature in the form of titanium dioxide, and the process of extraction and processing is complex. It is very difficult to melt and bond, because the affinity between titanium and oxygen is very strong, and it becomes titanium dioxide immediately after contact with air, while titanium dioxide is hard and brittle, and the strength of this part will continue to decline. So use inert gas to weld carefully. The Tig welding is usually carried out by arc welding of tungsten electrode and argon body. Titanium welding must be done without air. Titanium frames are expensive for these reasons.

Some aluminum frames are more expensive than titanium frames these days, which means titanium frames are cheaper. After the end of the cold war, the military expenditure was reduced and the amount of titanium was reduced. Excellent technicians began to use titanium to make vehicle frames and the cost of making titanium vehicle frames was reduced.

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