OIL-TEMPERED FINE WIRE FOR HIGH STRENGTH SPRING

摘要

PURPOSE:To obtain a wire having 650-750 Vickers hardness, 5-10% elongation and 240-300kgf/mm2 tensile strength by hardening and tempering the high carbon steel wire of a specified diameter contg. the specified amount of carbon under suitable conditions. CONSTITUTION:The high carbon steel wire of =0.5mm diameter contg. 0.5-1wt% carbon is oil-hardened at 800 deg.C and tempered at 320 deg.C to obtain an oil-tempered fine wire for a high strength spring.