kaasulämpökäsittelyt

Kaasulämpökäsittelyt are heat treatment processes conducted in a controlled gaseous atmosphere. The primary purpose is to modify the physical and chemical properties of materials, most commonly metals, without introducing unwanted contaminants or scaling on the surface. These treatments are crucial for achieving desired hardness, strength, ductility, or corrosion resistance.

The atmosphere within the heat treatment furnace is carefully managed. It can be inert, such as nitrogen or argon, to prevent oxidation or other undesirable reactions. Alternatively, the atmosphere can be reactive, containing specific gases like hydrogen, ammonia, or carbon-containing gases. Reactive atmospheres are employed for processes like carburizing, nitriding, or carbonitriding, where the gas components diffuse into the material's surface, altering its composition and microstructure.

Common types of kaasulämpökäsittelyt include annealing, hardening, tempering, and surface hardening processes. Annealing softens metals and relieves internal stresses, while hardening increases their strength and hardness. Tempering reduces brittleness after hardening. Surface hardening methods like carburizing and nitriding create a hard, wear-resistant layer on the surface of a component while keeping the core tough.

The precise control over temperature, time, and atmospheric composition allows for highly specific material property modifications. This precision makes kaasulämpökäsittelyt indispensable in many industries, including automotive, aerospace, tool manufacturing, and medical device production, where demanding performance requirements necessitate advanced material treatments. The absence of post-treatment cleaning for scale removal is another significant advantage.