Heat Treatment

Reliable vacuum solutions for precision heat treatment processes

What is Heat Treatment?

Heat treatment is a process used to alter the physical or chemical properties of a material through precise heating and cooling. This improves material strength, reduces wear, and boosts overall performance inside operations. 

engine gear wheels after heat treatment

The Role of Vacuum in Heat Treatment

If a clean, controlled environment is critical for your heat treatment operations, vacuum technology is essential to maintaining process quality. In a vacuum furnace, the absence of air and reactive gases prevents oxidation and contamination, allowing materials to heat and cool without unwanted surface reactions. This creates the clean environment your components need for consistent, reliable results.

Stokes vacuum systems are built for these demanding conditions and have been dependable workhorses in the heat treatment world for decades. Whether you decide to use oil‑sealed or dry pumping technology, our pumps deliver stable performance, cleaner processing, reduced operating costs, and maximum uptime to help your operation run confidently.

Common Heat Treatment Applications in Today’s Industries

Vacuum Annealing

Vacuum annealing is a heat‑treatment process where materials are heated in a controlled vacuum environment to enhance their mechanical properties. By heating the workpiece to precise temperatures under pressures below one atmosphere, holding it, and then cooling it at a defined rate, the process improves strength, ductility, hardness, and corrosion resistance while delivering a clean, contamination‑free finish.

Vacuum Brazing

Vacuum brazing is a joining process where metal parts are bonded using a non‑ferrous filler metal that melts and flows between tightly fitted components. Performing this process in a vacuum removes gases and oxides from the brazing area, improving metal wetting and ensuring precise, contamination‑free, high‑integrity bonds.

Vacuum Carburizing

Vacuum carburizing is a process that adds carbon to the surface of a metal part to increase hardness and wear resistance. At high temperatures, carbon diffuses into the surface to form a strong, durable case layer while keeping the core tough. Because the process takes place in a controlled vacuum environment, it delivers clean, consistent results without contamination.

Vacuum Nitriding

Vacuum nitriding is a process that introduces nitrogen to the surface of a metal part inside a controlled vacuum chamber. As the part heats, the nitrogen reacts with the surface to form a thin, hardened layer that boosts wear resistance and protects against corrosion. This controlled approach strengthens the surface without altering the part’s shape, making it a reliable option for components that need long‑lasting performance.

Vacuum Hardening

Vacuum hardening is a heat‑treatment process used to increase the strength and durability of steel parts. The material is heated to a controlled temperature inside a vacuum chamber and then rapidly cooled using gas or another method. The quick cooling creates a harder internal structure, while the vacuum keeps the surface clean and free from oxidation. The result is a strong, consistent finish with reliable performance.

Recommended Products for Heat Treatment

Contact Us for Heat Treatment Support

Have questions or need support for your heat treatment operations? Get in touch with us.