MECHANICAL-PROPERTIES OF ULTRAHIGH BORON STEELS

A fine and stable grain size in steel results in greatly improved mech anical properties. In analogy to the addition of larger quantities of carbon to form ultra-high carbon steels, the formation of borides in s teel through rapid solidification and powder metallurgical techniques leads to the required grain sizes (see Figure). The materials processi ng, microstructure control, and properties of the materials are review ed.