A solid billet is piercing-rolled using a 4 roll-type inclined rolling mill including larger-diameter cone-type main rolls arranged horizontally or vertically to face each other across a pass line and smaller-diameter auxiliary rolls arranged vertically or horizontally to face each other similarly across the pass line between the facing main rolls, while maintaining a feed angle ? and cross angle ? of the main rolls and a feed angle ? and cross angle ? of the auxiliary rolls to be within the ranges: 5???, ??25?; 3???, ??35?; and 10???+?, ?+??55?.

There are provided a very thin martensitic stainless steel foil and a manufacturing method thereof, which are capable of reducing shape defects and the like. A martensitic stainless steel foil of the present invention has a thickness of at most 35 ?m, and having a steepness of at most 0.75% when the steel foil has a length of 650 mm. Preferably, a metallographic structure in a cross-section of the steel foil is a ferrite structure, in which carbides are dispersed. More preferably, the steel foil consisting of, by mass, 0.25% to 1.5% C, 10% to 18% Cr, at most 1.0% Si (exclusive of 0%), at most 1.5% Mn (exclusive of 0%), at most 3.0% Mo (inclusive of 0%), and the balance of Fe with inevitable impurities.

Systems and methods for measuring the thermal crown of rolls in-situ (e.g., at high temperature) either inside or outside the rolling mill can include sensors that measure propagation times of mechanical waves through the rolls. In some embodiments, one or more sensors are used to measure the propagation times of ultrasonic waves traveling inside the roll and normal to the roll's axis. These measurements can be taken when the roll is still hot and can be used to determine in real-time the thermal expansion at various points along the roll.

Systems and methods for measuring the thermal crown of rolls in-situ (e.g., at high temperature) either inside or outside the rolling mill can include sensors that measure propagation times of mechanical waves through the rolls. In some embodiments, one or more sensors are used to measure the propagation times of ultrasonic waves traveling inside the roll and normal to the roll's axis. These measurements can be taken when the roll is still hot and can be used to determine in real-time the thermal expansion at various points along the roll.

A six-high rolling (also known as sexto) mill stand that is suited for hot rolling an intermediate strip into a thin strip that is less than 0.8 mm thick. A combined casting and rolling installation that includes the six-high rolling mill stand allowing for hot rolling in long uninterrupted sequences, without any change of the work rolls to obtain a strip with good geometry due to moderate rolling forces.

Apparatus and method for surface processing of cylindrical bodies, particularly for surface restoration of laminating cylinders. The apparatus includes a workstation configured to receive a cylindrical body having a lateral surface movable by rotation about an axis of rotation, a laser emitter cooperating with the workstation and configured to emit at least one laser beam, a profile detector configured to detect a detected surface profile of the lateral surface of the cylindrical body, and a control unit operatively configured to perform at least one procedure for restoring the lateral surface of the cylindrical body. The restoration procedure includes a procedure for detecting the surface profile of the cylindrical body, including a step of comparing the detected surface profile with a target surface profile, and a removal procedure including a step of emitting the laser beam on the cylindrical body to remove metallic material and to obtain the target surface profile.

A six-high rolling (also known as sexto) mill stand that is suited for hot rolling an intermediate strip into a thin strip that is less than 0.8 mm thick. A combined casting and rolling installation that includes the six-high rolling mill stand allowing for hot rolling in long uninterrupted sequences, without any change of the work rolls to obtain a strip with good geometry due to moderate rolling forces.

A solid billet is piercing-rolled using a 4 roll-type inclined rolling mill including larger-diameter cone-type main rolls arranged horizontally or vertically to face each other across a pass line and smaller-diameter auxiliary rolls arranged vertically or horizontally to face each other similarly across the pass line between the facing main rolls, while maintaining a feed angle and cross angle of the main rolls and a feed angle and cross angle of the auxiliary rolls to be within the ranges: 5, 25; 3, 35; and 10+, +55.

An electrode manufacturing device is provided. The electrode manufacturing device includes a pressing roll configured to apply pressure to an uncoated part of the electrode, wherein the pressing roll comprises a central part, a first end part and a second end part, wherein the uncoated part comprises an insulating coated part and a non-insulating coated part, wherein the first end part is adjacent to a boundary between the insulating coated part and the non-insulating coated part, wherein the second end part is located at a portion far away from the insulating coated part, and wherein a first outer diameter of the central part connected to the first end part is greater than a second outer diameter of the central part connected to the second end part.

A hot-rolling stand (10) for a hot-rolling mill comprises an adjusting device (12), which is intended for receiving a pair of work rolls (17) and for positioning work rolls (18, 19; 20, 21) of the pair of work rolls (17) in relation to one another to define a roll gap. In order to create a hot-rolling stand (10) that can be adapted as flexibly as possible, the adjusting device (12) is designed to interchangeably accommodate, in the pair of work rolls (17), different roll diameter ranges by means of mutually complementary work rolls (18, 19; 20, 21).