Titanium Fc Ring
There are pros and cons of each of the metals used in rings. Gold is the most used and most popular of all precious metals and comes in several versions. You can get a titanium fc ring of 10 karat gold, 14 karat, 18 karat, and even 24-karat gold is pure gold. Of course, the higher the carat the more expensive. On the other hand comes as platinum. One of the advantages that gold has on platinum is the choice of colors. You can buy rings or other jewelry in yellow gold, white and gold. There is even a pink and green can be obtained. You do not have this option with platinum, because it only comes in white. This is not a big problem today, as more and more people are opting for men's rings on a white gold or yellow rings. If you want a titanium fc ring of longer duration and do not mind paying a bit more for it, then you should consider going for platinum. Extrusion is a process used to create objects with cross section defined and fixed. The material is pushed or drawn through a die of desired cross section. The two main advantages of this process over manufacturing processes are the ability to create very complex cross sections and work with materials that are brittle, because the material is only compressive forces and shear. Also the final pieces are formed with excellent surface finish. . Extrusion may be continuous (theoretically producing indefinitely long material) or semi-continuous (producing many parts). The extrusion process can be done with hot or cold material. In 1797, Joseph Bramah patented the first extrusion process for making a lead pipe. It consisted of preheating the metal and then pass it through a die using a plunger handy. The process was not developed until 1820, when Thomas Burr built the first hydraulic press. Until then, the process was called squirting. In 1894 Alexander Dick expanded the extrusion process to copper and bronze alloys. . The process begins with heating the material. He then loaded into the container of the press. Block is placed in the press so as to be pushed, by passing it through the die. If better properties are required, the material can be treated by heat or cold worked. . The radius of extrusion is defined as the cross sectional area of ??the starting material divided by the cross-sectional area of ??the material at the end of the extrusion. One of the main advantages of the extrusion process is that this radio can be very large and still produce quality parts. Hot extrusion is done at elevated temperatures to avoid forced labor and make it easier the passage of material through a die. Most hot extrusion is carried out in horizontal hydraulic presses range from 250 to 12. 000 t. Pressure Ranges from 30 to 700 MPZ (4400 to 102,000 psi), so that lubrication is needed, can be oil or graphite for low temperature extrusion, powder or crystal to high temperatures of extrusion. The major disadvantage of this process is the cost of machinery and their maintenance. . The extrusion process is generally economical when produced several kilograms (pounds) and many tons, depending on the materials that have been used in the process. For example, in some steels become more economical if there are more than 20,000 kg (50,000 lb). . Cold extrusion is done at room temperature or near room temperature. The advantage of this over hot extrusion is the lack of oxidation, resulting in increased strength due to cold working or cold treatment, close tolerance, good surface finish and extrusion speed quickly if the material is subjected to brief heating. . Materials that are commonly treated with cold extrusion are: lead, tin, aluminum, copper, zirconium, titanium, molybdenum, beryllium, vanadium, niobium and steel. The warm extrusion is above room temperature but below the recrystallization temperature of the material in the temperature range 800 to 1800 ° F (424 ° C to 975 ° C). This process is usually used to achieve proper balance in the required forces, ductility and final properties of the extrusion. . Movement relative to the extrusion material to be subjected to extrusion: If the die is held stationary and the starting material is moved toward him, he is a "direct extrusion". If the starting material is stationary and the die is moved toward the starting material, then it was an "indirect extrusion. " There are several methods for the formation of internal cavities in the extrusion. One way is to use a hollow bar and then using a fixed or floating mandrel. .