An aspect of the present invention provides: a steel for a pressure vessel, the steel having excellent surface quality while having excellent strength and toughness even after a long-term post-weld heat treatment (PWHT); and a method for manufacturing same.

The invention relates to a method for partial hardening of a steel sheet by cold deformation, where the partial hardening of a steel is done by a cold deformation with a multi-step rolling and annealing process and in order to have a steel sheet with a homogeneous thickness steel sheet is used with at least two areas having different values in mechanical and/or physical properties in longitudinal direction of the material.

A method of producing a steel plate member includes: heating a steel plate member to a temperature higher than an austenite transformation finish temperature and subsequently cooling the steel plate member at a cooling rate higher than an upper critical cooling rate; and softening the steel plate member by reheating the steel plate member after the cooling of the steel plate member.

The present invention belongs to the technical field of high-efficiency, high-precision and high-performance laser bending of metal sheets, and relates to a line-shape spot laser bending method for metal sheets. The present invention uses a multimode laser scanning mirror or a single piezoelectric deformable mirror to convert laser Gaussian distributed point spots to uniformly distributed line-shape spot, and meanwhile, loads the spots in a bending line area and bends metal sheets so that the temperature field in the bending line of the metal sheet is distributed uniformly to achieve the purposes of reducing warpage deformation, enhancing bending angle consistency and increasing the bending efficiency.

A method for producing a steel plate member (SPM), including: a quenching step for heating the SPM to a temperature higher than an austenite transformation finish temperature A3 and subsequently cooling the SPM at a cooling rate (CR) faster than an upper critical CR; and a tempering step for reheating a second region of the SPM to a temperature higher than an austenite transformation start temperature A1 without reheating a first region of the SPM after quenching and subsequently cooling the SPM at a CR slower than a lower critical CR. In the cooling process of the tempering step, the shape of the second region is corrected in a temperature range from a temperature equal to or lower than A1 to a temperature equal to or higher than a temperature at which transformation into ferrite and pearlite is finished while maintaining the CR slower than the lower critical CR.

In a method for producing a flat steel product made of high-strength manganese steel, a hot or cold strip is provided with an alloy composition containing (in wt %): C: 0.0005 to 0.9; Mn: 4 to 12; Al: up to 10; P: <0.1; S: <0.1; N: <0.1; the remainder being iron, including unavoidable steel-alloying elements, with optional addition of one or more of the following elements (in wt %): Si: up to 6; Cr: up to 6; Nb: up to 1; V: up to 1.5; Ti: up to 1.5; Mo: up to 3; Sn: up to 0.5; Cu: up to 3; W: up to 5; Co: up to 8; Zr: up to 0.5; Ta: up to 0.5; Te: up to 0.5, B: up to 0.15. The hot or cold strip is flexibly rolled to a final thickness at a temperature of 60° C. to below Ac3 prior to a first rolling step.

The present invention relates to a method, and system for performing such method, for producing a press hardened part (2) of heat treatable material having zones of different structure by partially heating a blank (2) before the blank is processed. The method (100) comprises the steps of arranging (104) the blank in a furnace (10) for heating the blank to a temperature equal to or above the austenitization temperature of the material of the blank to get the blank into an austenitic phase, in a IR heating station (10) partially heating (106), by means of IR radiation (24), at least one first zone (2a) of the blank thereby keeping the at least one first zone of the blank in the austenitic phase, and arranging (108) the blank in a processing unit (30) for forming and quenching the blank to a press hardened part.

Methods for making a material superwicking and/or superwetting (superhydrophyllic) involving creating one or more indentations in the surface of the material that have a micro-rough surface of protrusions, cavities, spheres, rods, or other irregularly shaped features having heights and/or widths on the order of 0.5 to 100 microns and the micro-rough surface having a nano-rough surface of protrusions, cavities, spheres, rods, and other irregularly shaped features having heights and/or widths on the order of 1 to 500 nanometers. Superwicking and/or superwetting materials having micro-rough and nano-rough surface indentations, including metals, glass, enamel, polymers, semiconductors, and others.

The present invention relates to a temperature-control unit for a furnace device for heat treating a plate, in particular a metal plate. The temperature-control unit has a temperature-control body, which is arrangeable in a furnace chamber of the furnace device. The temperature-control body has a plurality of receiving bores. Furthermore, the temperature-control unit has a plurality of temperature-control pins, wherein the temperature-control pins are mounted in the receiving bores movably relative to the temperature-control body. The temperature-control pins are controllable in such a way that a temperature-control group of the temperature-control pins is extendable from the temperature-control body in the direction towards the plate, so that a thermal contact between the temperature-control group of the temperature-control pins and a predetermined temperature-control zone of the plate is generatable.

Disclosed are a grain-oriented electrical steel sheet and a method of manufacturing the same. The method for manufacturing a grain-orientated electrical steel sheet according to an exemplary embodiment of the present invention includes: providing an electrical steel sheet before forming primary recrystallization or after forming the primary recrystallization; and forming a groove in a surface of the electrical steel sheet by radiating laser and simultaneously spraying gas onto the electrical steel sheet, in which energy density E.sub.d and a laser scanning speed V.sub.s of the radiated laser satisfy the following conditions,
1.0 J/mm.sup.2E.sub.d5.0 J/mm.sup.2,
0.0518 mm/secV.sub.s0.2 mm/sec.