NON-NORMALIZED STEEL OF CRANKSHAFT WHICH IMPROVES THE INTENSITY OF A CRANK SHAFT BY IMPROVING THE COMPOSITION OF A CRANK SHAFT MICROALLOYED STEEL

摘要

PURPOSE: A non-normalized steel of crankshaft is provided to prevent the cracks generation of the mangan sulphide inclusion by increasing the rigidity of the mangan sulphide inclusion.;CONSTITUTION: A non-normalized steel of crankshaft comprises iron, carbon, silicon, manganese, chrome, aluminum, niobium and sulfur. The iron is the materials. The carbon is 0.420~0.440 weight%. The silicon is 0.450~0.550 weight%. The manganese is 1.450~1.550 weight%. The chrome is 0.200~0.300 weight%. The aluminum is 0.010~0.015 weight%. The niobium is 0.030~0.035 weight%. The sulfur is 0.04~0.05 weight%.;COPYRIGHT KIPO 2012