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The Welders Blog

Fun Fact #26: Did you know that the smallest recorded welds are less than the width of a human hair?

by Tony Solano 11 Dec 2024 0 comments

Micro-Welding: The Science of Welding at the Microscopic Level

Micro-welding is an advanced welding process used to join tiny components in industries like electronics, medical devices, and precision engineering. The welds can be as small as 10 microns wide, which is smaller than the width of a human hair, typically 70 microns. These incredibly tiny welds are made using specialized equipment, such as laser welding systems, and require extreme precision.


Where Micro-Welding Is Used

  • Medical Devices: Micro-welding is essential in creating devices like pacemakers, catheters, and stents, where tiny, delicate welds are needed to ensure both strength and biocompatibility.

  • Electronics: In electronics manufacturing, micro-welding is used to join components like micro-circuits, ensuring the connections are reliable without damaging the delicate materials.

  • Jewelry Making: Fine jewelry often requires micro-welding techniques to make near-invisible joins in precious metals, allowing for intricate designs and repairs.


How It Works

  • Laser Micro-Welding: The most common method of micro-welding is using pulsed lasers, which provide a highly focused heat source capable of creating precise, tiny welds with minimal thermal distortion.

  • Electron Beam Welding: For extremely small and precise applications, electron beam welding can be used to join microscopic components with pinpoint accuracy.

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