Ultra-High Strength, Corrosion Resistant Wire, a Method of Making Same, and a Method of Using Same

摘要

A method of making steel wire is described that includes the step of forming a length of wire from a high strength, corrosion resistant alloy. The alloy preferably has the following composition in weight percent. Carbon 0.03 max. Manganese 0.15 max. Silicon 0.15 max. Phosphorus 0.015 max. Sulfur 0.010 max. Chromium 19.00-21.00 Nickel 33.00-37.00 Molybdenum 9.00-10.50 Titanium 1.00 max. Boron 0.010 max. Iron 1.00 max. The balance of the alloy is cobalt and usual impurities. The wire is annealed at a combination of temperature and time effective to provide a grain size of about ASTM 6 or finer. The annealed wire is then drawn such that the cross-sectional area of the wire is reduced by about 50 to 80%. The as-drawn wire is then heat treated at a second combination of temperature and time effective to provide the wire with high strength and sufficient ductility that when the wire is wrapped to provide a coil having an inside diameter substantially commensurate with the diameter of the wire and then unwrapped it does not crack or break.