|Theory of High Speed Steel
For modern industrial production, in particular mass production, machining is one of the most important shaping and forming processes. Almost all tools employed for this purposes are made from high speed steels. In recent times, the use of high speed steels has also gained increasing importance for chip less shaping, example for extrusion, blanking and punching tools. With regard to chemical composition, distinction is made between Tungsten, molybdenum and tungsten molybdenum alloyed steel greats which, depending on the dominant stress they will be exposed to, contain different amount of carbon, vanadium and cobalt. the characteristic properties of all High speed steel greats include:
Influenced of alloying elements on the steel properties :
- High Working hardness.
- High wear resistance.
- High retention of hardness and red hardness.
- Excellent toughness.
Carbon : Forms Carbides, increases wear resistance, is responsible for the basic matrix hardness.
Tungsten and Molybdenum : Improved red hardness, retention of hardness and high temperature strength of the matrix, from special Carbides of great hardness.
Vanadium : Forms special Carbides of supreme hardness, increases High temperature wear resistance , retention of hardness and high Temperature strength of the matrix.
Chromium : Promotes depth hardening, produces readily soluble Carbides.
Cobalt : Improves red hardness and retention of hardness of the matrix.
Since it is possible to achieve specific properties by careful adjustment of these alloying elements, we are able to offer the most suitable high speed steel grade for virtually all kinds of application.
Since it is possible to achieve specific properties by careful adjustment of these alloying elements, we are able to offer the most suitable high speed steel great for virtually all kinds of applications.