METHOD FOR PRODUCTION OF THIN MICROCRYSTAL WIDE TAPES OF STAINLESS NICKEL CHROMIUM STEEL OF AUSTENITE GRADE BY MELT SPINNING Russian patent published in 2023 - IPC B22D11/06 C22C38/40 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, in particular to the production of microcrystal tapes intended for creation of high-temperature superconductors on a tape carrier of stainless nickel chromium steel of an austenite grade by spinning a melt on a single-roll installation. A method for the production of a microcrystal tape of stainless nickel chromium steel of an austenite grade by melt spinning includes obtainment of a melt of stainless nickel chromium steel of an austenite grade and formation of fast-cured steel in the form of a tape by brining the melt into contact with a surface of a rotating cooling roll. Stainless nickel chromium steel of an austenite grade is melted, brought into contact with a surface of a rotating copper water-cooled crystallizer roll, and a tape is formed with a width of 27 mm, thickness of 41 or 44 mcm by extrusion of the melt under pressure of 0.3-0.9 MPa through a nozzle with a rectangular hole vertically upward to the specified copper water-cooled crystallizer roll rotating relatively to the horizontal axis with a linear rotational speed of 20-40 m/s. At the same time, stainless nickel chromium steel is melted, having a carbon content of ≤0.2 wt.%, total silicon and manganese content of 2.5-4.5 wt.%, total phosphorus and sulfur content of ≤0.05 wt.%, wherein the manganese content is ≤2 wt.%, phosphorus content is ≤0.03 wt.%, and the ratio of a chromium content to iron is 0.46-0.48.

EFFECT: resulting continuous integral tapes have high physical and mechanical properties, resistance to high-temperature oxidation, and a linear expansion temperature coefficient in longitudinal and transverse directions of a spinning track within (10-20)·10⁶ K^-1.

1 cl, 3 dwg, 2 ex