Wire for oblique spring and diagonal spring spring

摘要

The wire for the obliquely wound spring is a core wire made of steel having a pearlite structure, a copper plating layer made of copper or a copper alloy that covers the outer peripheral surface of the core wire, and is disposed on the outer peripheral side of the copper plating layer. A hard layer having high hardness. The steel constituting the core wire is 0.5% by mass or more and 1.0% by mass or less of carbon, 0.1% by mass or more and 2.5% by mass or less of silicon, and 0.3% by mass or more and 0.9% by mass. The following manganese is contained, and the balance consists of iron and inevitable impurities.