铝合金与钛合金车架的优缺点对比 ★ 专业单车、自行车知识

铝合金与钛合金车架的优缺点对比 ★ 专业单车、自行车知识 铝合金与钛合金车架的优缺点对比 ? 专业单车、自行车知识 Advantages of aluminium alloy frame You can make a lightweight frame The aluminum is light but not hard enough to make it alloy and heat treatment for strength. The heat treatment adopts the aging method of aging, and simply says that the metal is formed in the metal to form a material that interferes with metal deformation. When heat treatment is done at a certain temperature, it will cause the aging to be taken out, and if it is not in the frame of the program, it will also cause the permanent temperature to run. That means putting the frame in the room will gradually become stronger. Many aluminum alloy frames are made of 6061T6 materials. The T6 symbol indicates heat treatment and aging. If there is no heat treatment the intensity can only reach one half, or one fifth. There are 7075 signs of bicycle parts, such as XTR cranks, which are strictly not heat-treated. In other words, because there is no statute of limitations, it is the statute of limitations. The 7075 alloy is originally necessary for heat treatment, which can be quintupled by heat treatment. In addition, the 7005 alloy is also used to make the frame, which is not as strong as 7075, but it can also be used at room temperature. This material can also be made into thin materials by Padded. But the strength of the material itself and the low modulus of the young's modulus, therefore, increase the thickness of the pipe to improve rigidity. This type is commonly referred to as the aluminum crude pipe. Does the use of appearance do not change for a long time Aluminum itself is very susceptible to corrosion of metal, almost non-existent in the air without being oxidized aluminum, placed in the air at once was oxidized to form a very thin oxide film. Why not rust? The reason is that the oxide film will stop rusting when it reaches a certain degree. The oxide film is almost colorless so it is not easy to detect changes in appearance (sometimes white). On the other hand, the more times you ride a bicycle, the more you ride it, the greater the degree of stress and the change in intensity. In recent days, a lot of car frames have been made using thin materials to achieve light weight. These are aluminum alloy with no fatigue limit to make the frame, after the long time use the strength change will be how! The sc61-10a, which is produced by Dedacciai, is a surface treated with a spray shot that is designed to prolong fatigue life. According to the open data, it can increase 140%. The handle is: fatigue damage is the cause of the cracks that occur on the metal surface, so it is used to improve the hardness of the metal surface. Defect of aluminium alloy frame Aluminum is a material that is elastic and rigid. So use a thick pipe, or change shape like cross over, padded pipe, etc. It must be heat treated, otherwise the intensity is not enough. As a result, the average size of a factory is unable to buy heat treatment equipment. Especially the aluminium alloy tube of 6000 series, most of which is the heat treatment condition of the pipe manufacturer. Titanium, titanium alloy (Ti, ti-al-v) and its merits You can make light and strong frame Pure titanium is more powerful. The addition of aluminum and vanadium to titanium metals, and higher elasticity (compared with aluminum), also help design. No rust Titanium is rarely corroded in a normal environment. But it has another corrosion phenomenon that is the corrosion of foreign metals. For example, when different kinds of alloys are joined together, it becomes an electrode state, and the potential difference causes the local electricity to corrode. The measure of this phenomenon is to use the paste to insulate it. (mixed with metal powder, such as the name: Ti Plepu, etc.). This metal powder prevents the fat from losing, even after it is lost, to prevent close contact. The metal powder is electrically conductive and does not matter, and is damaged by the smaller load after contact. This phenomenon is called "sticking" and it is different from "baking". "Stick and bite" : the phenomenon of metal bonding through corrosion. "Baking joint" : the heat produced by processing metal to dissolve the joint. Ride the feeling good The titanium is also used in the spring of the shock absorber. Now, a frame made of titanium is suitable for a long ride. Some drivers love titanium frames. I think riding is great. But individuals vary, some comparison and chrome molybdenum steel that chrome molybdenum steel frame shock absorbent is better than titanium frame, riding are also better than titanium frame (that and the shape of the chrome molybdenum steel frame and with thin tube is also linked to get the result of stress). If the process of the titanium tube is further improved, it may have the same ride as chrome molybdenum steel. Some titanium frames make people feel wobbly, which may be related to the use of a plane tube (no padded, thick, unchangeable tubes). Or use a high-strength titanium alloy, but not so thin. Disadvantages of titanium alloy frame Price is high Titanium is found in nature in the form of titanium dioxide, which is complex in processing and processing, high technical requirements and high cost of time. Another dissolves processing is very difficult, because the affinity of titanium and oxygen is extremely strong, become titanium dioxide, immediately after contact with air and titanium dioxide harder and more brittle than that part of the strength will continue to decline. So we're going to do it carefully with inert gas. The so-called Tig welding is (Tig: the ellipsis of tungsten and inert gases) with tungsten electrode and argon gas. Titanium welding must be insulated from the air. The titanium frame is expensive for these reasons. Recently, some aluminum alloy frames are more expensive than titanium, which indicates that the price of the titanium alloy frame has gone down. It has been shrinking since the end of the cold war, with less titanium. Excellent technicians began to make frames from titanium. The cost of making titanium frames is reduced. history The United States first used titanium alloys to make bicycle frames in the 1960s. Titanium alloy gives the impression of "light and hard". Early titanium alloy frame, as a race car, insufficient rigidity, the frame is not suitable for long distance car, also is not applicable to all the games, is only suitable for use in the mountain, or Big reces, Time traial need light vehicle, such as the specific occasion. The titanium alloy at the beginning made some people fascinated by the fact that there were some hot, lightweight riders, and all the screws were made of titanium. Titanium is an illusion that is expensive and rare, and is actually one of the most abundant elements on earth. Only because the cost of making the alloy is high, the price is more expensive. Metallic titanium is light, strong, and corrosively high material, commonly used in special environment. The addition of aluminum, vanadium (Li. V) in metallic titanium is significantly higher, and heat treatment is also enhanced by the process of ageing Mechanical properties of titanium alloy The alloy name differentiates the tensile strength (MPa) endurance (MPa) elongation (%) E (GPa) Pure titanium JIS 3 kinds 480 ~ 620 345 18 105 Grade 4, 550, 480 15 PTT800 800 UTT75 750 3-2.5 Ti annealing 685 ? 590 20 6-4Ti annealed 980 920 14 110 The adverse treatment was 1160, 1100, 10