Rolling method for micron tantalum foil / tantalum strip. The technical scheme is as follows: at room temperature, the width of 120~160mm, thickness of 0.1~0.2mm and tantalum content of more than 99.95% to be rolled by three passes process: The thickness of the tantalum strip after the first pass is 0.025~0.04mm, the thickness of the tantalum strip after the second pass is 0.01~0.024mm, and the width of the tantalum strip after the final roll is 120~160mm and the thickness of the micron tantalum foil / tantalum strip is 0.001~0.009mm. The invention only adopts three passes for rolling, which has simple process, high production efficiency and low energy consumption. The rolled micron tantalum foil / tantalum strip has bright surface, no crack, peeling, folding, no obvious oxidation and no impurity pressing defects. The surface quality is good, which can improve the quality of subsequent deep processing.
Tantalum has high corrosion resistance, because its surface will generate a dense and stable layer of tantalum pentoxide protective film, tantalum corrosion resistance equipment is widely used in the production of strong acid, bromine, ammonia and other chemical industry, can also be used as the structural material of aircraft engine combustion chamber.
The largest amount of tantalum is used to make tantalum capacitors, which are widely used in military, aerospace, national defense, communications, electronics and electrical industries. The working medium of tantalum capacitor is a very thin tantalum pentoxide film formed on the surface of tantalum metal. This layer of oxide film medium is integrated with one end pole of the capacitor and cannot exist alone. Therefore, it has a very high working electric field intensity per unit volume and a very large capacitance, that is, a very high specific capacity, so it is especially suitable for miniaturization.
By rolling the tantalum strip thinner, smaller and higher capacitors can be developed. Tantalum foil / tantalum strip (ZL93224020.8) patent technology discloses a tantalum foil strip used for molybdenum sheet and molybdenum rod as welding material. It is a ribbon foil, made of tantalum wire after annealing, cleaning, calendering repeatedly, its section is oval, the section size is (0.2-2)mmX (0.02-0.03) mm, Length is 10000 mm above, can be directly rolled into welding molybdenum and molybdenum rod required width, and uniform thickness and width, easy cutting, welding molybdenum rod can tolerance by tantalum, is easy to use and save raw materials, and high welding strength, molybdenum and molybdenum rod is ideal for welding materials, also is the indispensable material automatic spot welding line.
