PLASTIC DEFORMATION SPEED INFLUENCE ON HS2-9-1-8 HIGH-SPEED STEEL PLASTIC DEFORMATION STRENGTH

Tins paper presents how to determine plastic deformation strength accordingly to the temperature and speed deformation, for the HS2-9-1-8 high-speed steel, a material used more and more for cutting tools. Deformation strength value was established for the situation when the steel was forged. Each stroke parameters (speed and temperature) are slightly different from stroke to stroke and the reason is a math equation which links all three material characteristics being extremely useful especially for simulation process. Based on repeated checking, the difference between plastic deformation strength test values and theoretical ones was less than 3%. The determination of the mathematical relation which shows the deformation speed and temperature influence on the plastic deformation strength is a useful instrument for the cutting tools designers that use the simulation software.