초록 ▼

Articles, such as tubing, which have excellent corrosion resistance to steam at elevated temperatures and to hydriding, are produced from zirconium alloys containing 0.5 to 2.0 percent niobium, up to 1.5 percent tin, and up to 0.25 percent of a third alloying element such as iron, chromium, molybden

Articles, such as tubing, which have excellent corrosion resistance to steam at elevated temperatures and to hydriding, are produced from zirconium alloys containing 0.5 to 2.0 percent niobium, up to 1.5 percent tin, and up to 0.25 percent of a third alloying element such as iron, chromium, molybdenum, vanadium, copper, nickel and tungsten. The articles are formed by beta-treating the alloy, initially deforming the same at a temperature below 650°C. and further deforming the same through cold working stages also below 650°C., annealing the material between the cold working stages at a temperature between 500°-650°C., and final annealing the same at a temperature below 650°C. to provide articles having a microstructure of fine precipitates of less than about 800 Å, homogeneously dispersed throughout the zirconium.

대표청구항 ▼

An article of manufacture for use in the elevated temperature aqueous environment of a water reactor, said article comprising: a zirconium alloy comprising said article and consisting essentially of: 0.5 to 2.0 weight percent niobium, 0.9 to 1.5 weight percent tin, 0.09 to 0.11 weight percent of a t

An article of manufacture for use in the elevated temperature aqueous environment of a water reactor, said article comprising: a zirconium alloy comprising said article and consisting essentially of: 0.5 to 2.0 weight percent niobium, 0.9 to 1.5 weight percent tin, 0.09 to 0.11 weight percent of a third alloying element selected from the group consisting of iron, chromium, molybdenum, vanadium, copper, nickel and tungsten, and the balance of said alloy essentially zirconium; a microstructure of precipitates homogeneously dispersed throughout the matrix of said zirconium alloy, said precipitates having an average particle size below 800 angstroms.