Vacuum Furnace

Why Are Vacuum Furnaces Used For Annealing High-end Metals

Traditional annealing is carried out in air or under a common protective atmosphere, but even a small amount of oxygen or moisture can "damage" the metal at high temperatures. The ultimate solution to this problem is a vacuum heat treatment furnace.

As a professional  industrial heat treatment furnaces manufacturer , CHTEE can provide vacuum annealing furnaces and vacuum quenching furnaces. Please continue reading to see how we solve the problems of workpiece heat treatment.

The Four Core Systems of a Vacuum Annealing Furnace

A standard vacuum annealing furnace, much like a "high-tech thermos," consists of four key components:

🔧 Double-layered water-cooled furnace body

Stainless steel outer shell + interlayer cooling water, ensuring the outside remains cool to the touch while the inside can reach 1200℃.

🌀 Vacuum system

A mechanical pump leads the way, followed by a molecular pump, capable of evacuating the air inside the furnace to just one ten-thousandth of its original pressure (up to 10⁻⁵ Pa), making it even "emptier" than outer space!

🌡 Heating system

Commonly uses graphite or molybdenum/tungsten heating elements, transferring heat through radiation in a vacuum, ensuring cleanliness and efficiency.

🧠 Intelligent temperature control + cooling system

PID precise temperature control (±1℃), and can also use argon or nitrogen gas for rapid cooling, with full programmability.

How does it work? Four steps!

Closing the door → Vacuuming

Place the workpiece inside, close the door, and activate the "vacuum mode".
Air, water vapor, and oxygen are all removed, creating a "sterile environment" inside the furnace.

Starting heating → Uniform temperature rise

The heating element is powered on, transferring heat to the workpiece through radiation, similar to how the sun heats the earth.
Because there is no air convection interference, the temperature is more uniform, preventing uneven heating.

Holding temperature → Structural regeneration

After reaching the set temperature, the temperature is held for a period of time, allowing the metal's internal grains to "rearrange," eliminating residual stress and restoring plasticity.

Cooling → Program control

Cooling can be slow (cooling with the furnace) or fast using inert gas, entirely according to process requirements.

Finally, the workpiece is removed from the vacuum furnace—
The surface is bright and new, without any oxidation, and the composition remains unchanged—perfect!

Who uses this kind of "advanced furnace"?

✈️ Aerospace

Titanium alloys and nickel-based superalloys cannot have even a trace of contamination;

💡 Semiconductors/Electronics

Silicon wafers and target materials require extremely high purity;

🏥 Medical Devices

Alloys implanted in the human body must be defect-free;

🔋 New Energy

Soft magnetic materials used in power batteries require precise annealing.

In these fields, vacuum annealing is already standard practice.

Contact our vacuum technology experts now

We will help you provide an optimal vacuum furnace solution that delivers maximum value to your business. We start by thoroughly understanding the tasks you need to accomplish and then propose each solution accordingly. Please contact us now.

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Zhejiang ,China

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8615356839263

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te@chtemake.com

We are one of the most professional vacuum furnace manufacturers and suppliers in China. With abundant experience, we warmly welcome you to buy high quality vacuum furnace made in China here from our factory. Thank you for your interest in our products.