Cu-Cr SYSTEM ULTRAFINE COPPER ALLOY AND METHOD OF ITS PRODUCTION Russian patent published in 2013 - IPC C22F1/08 C22C9/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to production of ultrafine materials that feature higher strength and electric conductivity and may be used in electrical engineering for making components, conductors and terminals operated at increased temperatures and mechanical loads. Said ultrafine material comprises reinforcing phase fractions with mean disperse particle size smaller than 20 nm, while mean grain size in alloy structure is smaller than 500 nm. Note here that quantity of grains with high-angular boundaries exceeds 60%. Proposed method comprises heating, quenching, forming and ageing. Note here that quenching is performed at 1020-1050°C. Thereafter, intensive plastic deformation is performed at 20-300°C with cumulative strain number making, at last, 3. Now, ageing is carried out at 400-500°C.

EFFECT: limit strength exceeding 550 MPa, higher conductivity and thermal stability.

3 cl, 3 ex, 6 tbl, 6 dwg