Parts Fabrication Currently, commercial alloy suppliers cast alloys into ingots, such as moments that are easy to roll into circular plates. Shape, or a circle used in pipe manufacture cone. The parts are prepared by high temperature extrusion and forging when close to the alloy recrystallization temperature, the general temperature is 1000-1300℃. Most commercial alloys have very good properties.
It is ductile and can be processed into different products such as sheet, foil, rod, thread and tube, with cold shrinkage often exceeding 70%. You can use almost all of them. Through the metal forming process, the niobium alloy products are made into complex shapes, such as dense die forging, spinning molding, and liquid. Press molding and welding.
Niobium alloys are most commonly used in sodium vapor lamps for high temperature applications. Nb-1Zr alloy has excellent formability and weldability. Long life in sodium vapor environment. Small tubes of Nb-1Zr alloy for sodium vapor lamps are made from seamless tubes, most recently by pulling tubes out of sheets. This kind of Bulb high electrical efficiency, long life, super over 25000h, widely used in highway lighting in the world.
Aviation industry can be used at 1100 ~ 1500℃, high strength C-103 alloy is the main product of niobium industry. It has an excellent cold working and weldability, Easy to die forging for thrust cone, high temperature valve, etc. C-103 alloy has no oxidation resistance and can be coated with silicide. Parts, coatings in addition to silicon, and elements such as chromium, iron, nickel and hafnium. The coated C-103 alloy was successfully used in the Pratt - Whitney turbine engine thrust booster disc, these valve plate is placed in the rear combustion chamber of the engine to form a high temperature isolation chamber with a temperature of 1200 ~ 1300℃.
Niobium is used in high-temperature parts on the National Space Shuttle, as well as in the leading edges of supersonic wings and nose cones.
