The aim of present research is to study the effect of spheroidizing annealing
for steel that contains (0.51% Ċ) on the hardness, wear rate, ultimate tensile
strength, and ductility. The effect of heat treatment that prier the spheroidizing
annealing treatment is studied as well , that the specimens firstly is heated to the
temperature equal to ( 860 Ċ) , then cooled in furnace and in air ,and then carried
out spheroidizing annealing treatment at the temperature equal to
( 860 Ċ ) for ( 6 h ) , it is show that the process of spheroidizing annealing
decrease hardness, wear strength , and ultimate tensile strength , and increase
ductility that improve of machining properties of steel .