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Understanding Kovar: Metal Spinning, Techniques, and Applications

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Ever wondered if a metal could have similar properties to glass? Meet Kovar - the game-changing alloy that makes it all possible.

As an iron-nickel-cobalt alloy, Kovar is designed to have almost the same thermal expansion properties as borosilicate glass, allowing tight mechanical joints between two materials over a wide range of temperatures. Why is that important? Let’s dive in a little deeper.

HOW IS KOVAR SIMILAR TO GLASS?

Kovar, which is also known as Rodar, possesses similar properties to borosilicate glass, which is a bit different from your everyday glass. Borosilicate glass contains boron trioxide, giving it a low coefficient of thermal expansion—ultimately, it will not crack under extreme temperatures like standard glass does.

Some examples of borosilicate glass include:

  • Chemistry beakers
  • Coffee pots
  • Hot mirrors
  • Syringes
  • Flasks
These are glass items that can withstand going from a heated setting to a cold setting, or vice versa, without breaking, shattering, or being damaged.

Why is that important? Well, Kovar was created to solve the tricky problem of sealing glass and even certain ceramics to metal, which is crucial in:
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  • Light bulbs
  • Vacuum tubes
  • Cathode ray tubes
  • Aerospace sensors
  • Satellite instruments
  • Scientific research equipment
  • Vacuum systems in chemistry
Most metals can’t seal to glass and ceramics because their thermal expansion rates are different. As the joint cools after fabrication, the stresses from these different rates will cause the joint to crack, but Kovar’s unique properties make it the perfect solution to the issue.

ADVANTAGES

Kovar is amazing when it comes to its unique properties. Compared to other metals, Kovar’s ability to maintain its integrity in extreme conditions gives it a big advantage. It’s particularly valuable in industries like aerospace, electronics, and scientific research.

Here are some specific advantages of Kovar applications:blake adams

  • Low Magnetic Interference: Great for use in sensitive electronic environments where magnetic interference needs to be at its lowest.
  • Thermal Stability: Perfect for creating glass-to-metal seals without cracking from temperature differences.
  • Durability in Extreme Conditions: Crucial in aerospace materials and scientific uses where precision and stability are needed.

Overall, Kovar excels in applications where a strong, durable, and thermally stable material is needed. Its unique properties make it a top choice for challenging environments where other metals might not make the test.

KOVAR METAL SPINNING

Metal spinning is a highly effective technique for shaping metal. Imagine a potter who’s shaping clay on a wheel—metal spinning is similar, but instead of clay, metal is used. The process involves rotating a circular sheet metal blank at high speeds while applying pressure with a tool to mold it around a mandrel—a cost effective way to create symmetrical objects like cones, cylinders, and domes with smooth finishes and high precision.blake adams (2)

When it comes to Kovar, metal spinning offers some significant benefits:

  • Unique Properties: Maintains low thermal expansion and integrity during spinning.
  • Precision Metal Forming: Crucial for application in electronics and aerospace.
  • Efficiency: Reduces waste and often eliminates the need for additional machining.

At KRYTON Metals, we excel in metal spinning techniques and solutions. Our state-of-the-art facility is equipped to handle a variety of metals, including steel, stainless steel, aluminum, and more. While Kovar presents unique challenges, our skilled team and advanced equipment ensure that we can deliver high-quality, precision-formed metal parts.

WRAPPING UP

Kovar is a fantastic metal that combines the best properties of glass and metal, making it a go-to choice for challenging applications. From creating tight glass-to-metal seals to performing reliably under extreme conditions, Kovar stands out in many industries, including aerospace, electronics, and scientific research.

At KRYTON metals, our state-of-the-art facility and highly skilled team of experts are ready to handle the complexities of working with Kovar and other metals. Whether you need precision metal spinning or solutions for complex fabrication challenges, we’ve got you covered.

Ready to see what Kovar and our advanced metal spinning capabilities can do for your next project? Reach out for more details on how KRYTON metals can assist with your metal fabrications needs.

Note: Kovar® and Rodar® are registered trademarks of CRS Holding.