RU2743080C1 - Amorphous strip rolling method - Google Patents

Abstract

FIELD: metallurgy.

SUBSTANCE: invention relates to the field of metal forming by pressure, in particular, to the production of thin strips from amorphous alloys, mainly based on zirconium, using multi-pass rolling. The method for rolling amorphous strips includes forming a package, which consists of a sheet steel billet bent at an angle of 180°, between the two halves of which strip samples of an amorphous alloy are placed. The thickness of the steel sheet is 0.95-1.00 mm.

EFFECT: as a result, it is possible to roll thin amorphous strips with a degree of deformation of more than 50% while reducing labor intensity and energy consumption.

1 cl

Description

The invention relates to the field of metal forming by pressure, in particular, to the production of thin strips from amorphous alloys, mainly based on zirconium, using multi-pass rolling.

Due to the unique complex of properties, amorphous materials are used in a wide variety of conditions. Despite significantly higher prices and more complex melting technologies in comparison with crystalline materials, amorphous alloys are significantly superior to their crystalline counterparts in terms of mechanical properties. Thin amorphous ribbons are one of the products with a particularly high demand in industry.

However, the low plasticity of amorphous alloys does not allow rolling them with large degrees of deformation. The process of plastic deformation is accompanied by rapid destruction of the samples. To date, there is no technology for rolling amorphous strips without lining to a thickness of the order of several tens of micrometers.

There is a known method for thinning strips (US 2013/0025746 A1, publ. 01/13/2013), in which plates of metal glasses can be formed (for example, by injection molding) and serve as a preliminary form for rolling. The plates are lowered through an RF coil into compression wheels directly next to or below the coil. As the plates pass through the coil, they are heated to a temperature above the glass transition temperature. They are then fed into a rolling wheel for thermoplastic forming of plates into thinner plates.

The disadvantage of the invention is the need for an inert atmosphere, as well as heating the tapes.

A known method for producing high-strength titanium foil (RU 2 243 835 C1, publ. 01/10/2015), which is a repetitive cycle, each of which includes multi-pass reverse cold rolling and vacuum annealing.

The disadvantage of the invention is the need to use vacuum annealing.

Closest to the proposed invention is a method (useful model RU No. 184621, IPC В21В 3/00, publ. 27.11.2017) for rolling thin sheets of hard-to-deform alloys, involving the creation of a package consisting of two sheet covers, between which sheet workpieces from a hard-to-deform alloy, and along the perimeter of the lining, they are connected to each other by inserts welded to them. Common to the proposed invention is the need to create a package.

The disadvantage of this invention is the need for welding and the use of liners, which increases labor intensity, energy consumption and cost.

The technical result achieved in the invention is to ensure the possibility of rolling thin amorphous strips with a degree of deformation of more than 50% while reducing the complexity of the method and energy consumption.

implies the formation of a package consisting of a sheet steel billet with a thickness of 0.95-1.00 mm, compressed at an angle of 180 °, between the two halves of which strip specimens of an amorphous zirconium-based alloy are placed and which are tightly compressed together mechanically, then the formed package are subjected to multi-pass rolling.

The technical result is achieved by the fact that in the proposed method of rolling amorphous strips, a package is formed, consisting of a sheet steel billet with a thickness of 0.95-1.00 mm, compressed at an angle of 180 °, between the two halves of which strip samples are placed from an amorphous alloy based on zirconium and which are tightly squeezed together mechanically. Then the formed package is subjected to multi-pass rolling in the temperature range from the boiling point of liquid nitrogen to 300 ° C.

The relationship between the deformation of the steel matrix and the strips has been established empirically, namely, the strips are rolled 8-12% less than the steel shell. Using the proposed method, it is possible to roll strips with deformation degrees of more than 50% without destruction.

It was also experimentally found that rolling can be effectively carried out in the temperature range from the boiling point of liquid nitrogen to 300 ° C.

An example of a specific implementation of the method.

The package is formed from the top plate with a thickness of 0.95-1.00 mm, the bottom plate with a thickness of 0.95-1.00 mm, obtained from a sheet steel blank with a thickness of 0.95-1.00 mm, compressed at an angle of 180 °, and glued on the bottom plate of the amorphous ribbons. Multi-pass rolling was performed at a room temperature of 20-22 ° C.

By rolling using a package, strips with a thickness of 20 μm were produced, which is more than 50% of the initial thickness of the samples. After rolling, there were no defects on the strips: folds, transverse and longitudinal ribbing of the sheets, uneven strips in thickness.

Claims (1)

A method for rolling amorphous strips, in which a package is formed, consisting of a sheet steel billet with a thickness of 0.95-1.00 mm, compressed at an angle of 180 °, between the two halves of which strip samples of an amorphous zirconium-based alloy are placed and which are tightly compressed together mechanically, then the formed package is subjected to multi-pass rolling in the temperature range from the boiling point of liquid nitrogen to 300 ° C.