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. Carbon0.03max. Manganese0.15max. Silicon0.15max. Phosphorus0.015max. Sulfur0.010max. Chromium19.00-21.00 Nickel33.00-37.00 Molybdenum 9.00-10.50 Titanium1.00max. Boron0.010max. Iron1.00max. 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.