From brittle molybdenum foil and molybdenum sheets to precision armor: The manufacturing journey of molybdenum shielding covers
In the high-end electronics and semiconductor fields, effective electromagnetic shielding is crucial for ensuring the stable operation of equipment. Among various shielding materials, the molybdenum shielding cover made from molybdenum foil and molybdenum sheet stands out due to its outstanding performance. Molybdenum, as a refractory metal, has a high melting point, low thermal expansion coefficient, and excellent shielding efficiency, making it an ideal choice for manufacturing precise shielding covers. However, transforming a flat and brittle molybdenum foil into a structurally complex and precisely sized molybdenum shielding cover requires a meticulous manufacturing process filled with technical challenges.
This journey began with the preparation of raw materials. The molybdenum foil used for processing is usually of extremely high purity, but due to the properties of molybdenum itself, it is hard and has poor ductility at room temperature. This brittleness is the primary obstacle in its processing process, and directly conducting stamping and forming is very likely to cause the material to crack or break. Therefore, how to tame this tough molybdenum sheet so that it can withstand plastic deformation has become the core issue in manufacturing the molybdenum shielding cover.
Pressing and forming is the core step in shaping the molybdenum foil, usually accomplished through a precision progressive die in a single operation, involving multiple processes such as blanking, drawing, and punching. However, this is not an easy task. During the pressing process, the molybdenum foil undergoes significant "work hardening", becoming increasingly brittle. To address this issue, the crucial "intermediate annealing" process is introduced. Under hydrogen or vacuum protection, the semi-formed molybdenum shielding cover billet is heated to a high temperature to eliminate internal stress and restore its ductility. This "pressing-annealing-repressing" cycle may be repeated multiple times before the flat molybdenum foil can be gradually shaped into a sturdy molybdenum shielding cover with specific depth and structure.
After the main body is formed, the molybdenum shielding cover needs to undergo meticulous post-processing. For complex features that cannot be achieved through stamping, such as fine irregular holes, high-precision laser cutting is used to complete them. Subsequently, the product must undergo strict ultrasonic cleaning to remove all oil stains and impurities. To enhance corrosion resistance and improve welding performance, the final molybdenum shielding cover is often subjected to surface treatments such as nickel plating, enabling it to withstand the erosion of the external environment and be firmly welded to the circuit board.
From an original molybdenum sheet to a flawless molybdenum shielding cover, the manufacturing process integrates precise stamping, protective heat treatment and secondary processing technologies. Each step aims to overcome the limitations of the material itself and precisely control its shape and performance. It is through this rigorous process that the brittle molybdenum foil is transformed into a precise "armor" to protect electronic components, providing a solid guarantee for the reliability and signal integrity of the equipment in a complex electromagnetic environment.
The molybdenum foil is in high demand in various parts of the world, such as: USA, Canada, Chile, Brazil, Argentina, Colombia, Germany, France, United Kingdom, Italy, Sweden, Austria, Netherlands, Belgium, Switzerland, Spain, Czech Republic, Poland.
As a Chinese Manufacturer, Mosten Alloy can produce molybdenum tube, molybdenum target, molybdenum sheet, molybdenum block, molybdenum foil, molybdenum wire, molybdenum rod, molybdenum processing workpiece according to customer demand. If you have any questions, please send email to info@mostenalloy.com.
