Gyorsacélok

Gyorsacélok, known in English as high-speed steel (HSS), are a class of tool steels that are known for their high hardness, wear resistance, and red-hardness. These properties make them suitable for cutting tools that operate at high speeds and high temperatures. Gyorsacélok typically contain significant amounts of tungsten and molybdenum, along with carbon, chromium, vanadium, and often cobalt.

The hardness of gyorsacélok is achieved through heat treatment, which involves quenching and tempering. The alloying elements, particularly tungsten and molybdenum, form hard carbides within the steel matrix. These carbides contribute significantly to the wear resistance. The red-hardness of gyorsacélok means they retain their hardness even when heated to high temperatures during cutting operations, which is crucial for maintaining tool performance and extending tool life.

There are various types of gyorsacélok, often categorized by their composition and intended application. For example, tungsten-based steels are common, as are molybdenum-based steels, which are generally more economical. Cobalt-added grades offer enhanced red-hardness for particularly demanding applications. Gyorsacélok are widely used in manufacturing for applications such as drills, milling cutters, taps, dies, and blades. While newer tool materials like cemented carbides and ceramics have emerged, gyorsacélok remain a popular and cost-effective choice for many machining operations.