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Laser Annealing / Heat Marks

What is Annealing?

Annealing, also known as heat marking, is a thermo-chemical reaction that occurs when a laser beam applies a low amount of heat to the surface of a part. The heat causes an oxidation process that alters the color of the material, resulting in a visible and permanent mark. However, there is no depth in the mark as annealing does not displace any material.

Most heat marks on metal will result in a dark or black mark, which is why this process is also referred to as black annealing or dark marking. Other colors are possible though, depending on the composition of the metal being marked. 

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Laser Marking Stainless Steel

WHAT TYPES OF MATERIAL CAN BE ANNEALED?

Metals that contain carbon can be annealed. Typically, the best heat marks are produced on titanium, steel, stainless steel, iron, and carbide. 

WHAT TYPE OF LASER SOURCES ARE USED FOR ANNEALING?

Fiber and YVO4 CO2 laser sources can provide excellent heat marks. The material composition of the part you are marking will determine which laser source is best for your application.

WHAT INDUSTRIES OR APPLICATION USE THE ANNEALING PROCESS?

Annealing is very common in the medical and aerospace industries. Because annealing does not move or displace material, this marking process prevents bacteria growth and corrosion in the mark. Limiting the possibility of these issues can be critical for the parts used in these industries.

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Our in-house design and engineering department has a full range of services and support to ensure that your marking application is successful.

ADDITIONAL INFORMATION

Why GT SCHMIDT?

At GT SCHMIDT, we design, build, and implement marking solutions that help manufacturers leave a lasting mark on their products, their companies, and their industries.

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made in usa since 1895
125 years of experience
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