Disclosed herein are TRIP (transformation induced plasticity) steel alloy thin metal strips or, stated differently, high strength, high ductility steel alloy thin metal strips formed of a composition described herein, being substantially free or free of aluminum. In being substantially free, the aluminum content is equal to or less than 0.01% by weight.

Methods for producing a flat product from an iron-based shape memory alloy may involve casting a melt comprised of iron, alloying elements, and impurities into a strip having a thickness of 1-30 mm and cooling the melt as the strip is formed. A twin-roll caster may be employed to help cool and form the melt into the strip. The resultant flat product is highly resistant to bending and is robust under pressure and torsion.

A twin roll casting system where the casting rolls have a nip between the casting rolls, each roller having a circumference and a rotational period. The casting roll controller adjusts the nip between the casting rolls in response to control signals. The sensor measures at least one parameter of the cast strip. The ILC controller receives strip measurement signals from the sensor and provides control signals to the casting roll controller. The ILC controller includes an ILC control algorithm to generate the control signals based on the strip measurement signals and a time delay estimate based on circumference, rotational period, and a length of cast strip between the nip and the sensor to compensate for an elapsed time from the cast strip exiting the nip to being measured by the cast strip sensor.

A magnesium alloy cast-rolling unit, including: a main body; a fluid supplier; an electric pushrod; a linkage mechanism; a horizontal platform; a screw; dovetail guide rails; and a bottom plate. The main body includes a base, a spring cylinder, a hydraulic adjustment cylinder, a connection portion, and a cast-rolling unit body. The connection portion includes an arc-shaped rail. The spring cylinder includes an actuation element. The actuation element includes a piston rod and a pressure strip. The piston rod includes an external thread at one end; and the pressure strip includes an internal thread corresponding to the external thread. The fluid supplier includes a head box, a corrugated pipe, a compression spring assembly including a gland cover, a connection pipe including a convex pipe joint and a concave pipe joint, a flat plate including a groove, a smelting furnace, and a horizontal operation platform.

Described herein are thin metal strips having hot rolled exterior side surfaces characterized as being primarily or substantially free of all prior austenite grain boundaries, or at least primarily or substantially free of all prior austenite grain boundaries, and including elongated surface structure. As a result, because the prior austenite grain boundaries are not primarily or substantially present, all such prior austenite grain boundaries are not susceptible to grain boundary etching due to acid etching or pickling. In particular examples, the thin metal strips undergo hot rolling performed with a coefficient of friction equal to or greater than 0.20 with or without use of lubrication.

A method of making floor plate includes assembling a pair of casting rolls laterally disposed to form a nip, assembling a hot rolling mill downstream of the nip having work rolls with a surface pattern forming the negative of a raised slip-resistant pattern desired in a floor plate, introducing molten metal through at least one metal delivery nozzle to form a casting pool supported on the casting rolls above the nip; counter rotating the casting rolls to form shells on the casting surfaces of the casting rolls to cast metal strip of less than 2.2 mm thickness downwardly from the nip, and delivering the cast metal strip to and through the hot rolling mill to form by the negative of the slip-resistant pattern on the work rolls a raised slip-resistant pattern of between 0.3 and 0.7 mm in height in a floor plate of less than 1.7 mm thickness.

There is provided a heat exchanger and a fin material for the heat exchanger that can suppress occurrence of hollow corrosion in a fin and hold cooling performance for a long period of time under a high corrosion environment. The heat exchanger includes an aluminum tube through which a working fluid circulates and an aluminum fin which is bonded to the tube. The fin has a region B around a grain boundary, and a region A around the region B. In the region B, 5.010.sup.4 pieces/mm.sup.2 less of AlFeMnSi based intermetallic compound, each of which has equivalent circle diameters of 0.1 to 2.5 m, are present. In the region A, 5.010.sup.4 pieces/mm.sup.2 to 1.010.sup.7 pieces/mm.sup.2 of AlFeMnSi based intermetallic compound, each of which has equivalent circle diameters of 0.1 to 2.5 m, are present.

An apparatus for continuous casting metal strip reducing snake eggs comprising a pair of counter rotating casting rolls, each roll less than 800 millimeters in diameter and positioned to form a nip there between through which thin strip can be cast; a metal delivery system disposed above the nip and capable of discharging molten metal to form a casting pool supported on the rolls; a pair of side dam holders and a pair of side dams assembled adjacent each end portion of the rolls, each side dam holder tapered along edge portions to dovetail with an adjacent side dam, and each side dam adapted to confine the casting pool of molten metal supported on casting surfaces of the rolls; an oscillation mechanism adapted to cause lateral oscillation of each side dam and side dam holder at a frequency 2-50 hertz and with an amplitude 100-2000 m during a casting campaign.

Described are nosetips for continuous casting of a metal alloy. The nosetip may include a first portion having a first surface parallel to a second surface opposite the first surface. The nosetip may include a second portion having a third surface directed toward an extended first surface. The extended first surface may be in a common plane with the first surface. The nosetip may include a third portion having an arcuate surface connecting the third surface to the extended first surface. The arcuate surface may include a point of curvature at a vertical distance from the extended first surface. The vertical distance may be configured to limit a maximum meniscus height for liquid metal, cast using the nosetip, between the nosetip and a continuous casting surface. Also described are methods of continuous casting a metal alloy at a casting speed of greater than 12 m/min.

An AMC, and in particular to an AMC with high strength, high toughness, high thermal conductivity, and good weldability for a 5G base station and a preparation method thereof. A strip of the AMC with high strength, high toughness, high thermal conductivity, and good weldability for a 5G base station can be prepared by an electromagnetically and ultrasonically-controlled twin-roll continuous casting device developed and designed based on chemical composition designing, in-situ nanoparticle strengthening and refinement, and REM microalloying. The composite strip prepared by this technology has fine grains, nano-REM precipitated phases in grains, and in-situ nano-ceramic particles with high thermal conductivity at grain boundaries, which significantly improves strength, toughness, and thermal conductivity of the alloy at room temperature, and increases a grain boundary content and effectively improves roll cold weldability of the alloy strip since the alloy composition design with a low melting point and the significant grain refinement.