摘要:
The invention relates to a method and equipment for controlling flatness of a stainless steel strip in connection with cooling after annealing in a finishing line. The strip (1) is first in the direction of the strip movement (2) cooled feeding at least one cooling medium through at least one group of feeding devices (5, 6) located transversally to the direction of the strip movement for the whole width of the strip (1), the amount of the cooling medium being adjusted utilizing the recorded and predetermined data (7) of desired temperature of the strip for flatness, the temperature of the strip is then determined (8) and after the temperature determination a further step of cooling is carried out feeding at least one cooling medium through at least one group of feeding devices (9) located transversally to the direction of the strip movement (2), when the determined value of temperature is different from the predetermined value of temperature, before the flatness is controlled using a control device (11) containing a plurality of flatness control units (12) and locating transversally to the direction of the strip movement (2).
摘要:
In order to provide a manufacturing device and a manufacturing method for a hot-rolled steel strip, which are capable of obtaining the desired quality of material by rapid uniform cooling immediately after rolling, and improving yield by early sheet tension and sheet shape measurements, a manufacturing device for a hot-rolled steel strip is provided with a finishing rolling mill line (11), a first cooling unit (13) installed just behind the exit side of the finishing rolling mill line, and a pinch roll (14) which is installed on the exit side of the first cooling unit and in contact with both the upper and lower surfaces of a strip (S), at least a wiping roll (15) located on the upper side of the strip (S) is disposed between the first cooling unit and the pinch roll, and a tension/shape measuring unit (16) for measuring the tension and shape of the strip (S); is installed between the wiping roll and the pinch roll.
摘要:
The present invention related to a Push to talk Over Cellular (PoC) Server for providing PoC communication services in communications system, the PoC Server being arranged to simultaneously perform a first PoC Session between a first PoC Client and at least a second PoC Client, and at least one second PoC Session between the first PoC Client and at least a third PoC Client in accordance with a priority setting. The Push to talk Over Cellular (PoC) Server is characterized in that it is further arranged to: receive, from said at least second PoC Client, a first information indicating that a user of said at least second PoC Client wants to alert the user of said first PoC Client about relevant Media being shared in said first PoC Session; or receive, from said at least third PoC Client, a second information indicating that a user of said at least third PoC Client wants to alert the user of said first PoC Client about relevant Media being shared in said at least second PoC Session; and if the received information is a notification, forward said received information to said first PoC Client; or if the received information is an override message, change said priority setting for said first and/or said at least second PoC Sessions associated with said first PoC Client in accordance with said override message. The present invention also relates to a method for providing PoC communication services, a mobile terminal comprising a PoC Client and methods thereof, a communications system and a computer program product.
摘要:
A method is provided for cooling sheet metal using a cooling section having multiple coolant dispensing devices for cooling upper and lower faces of a sheet metal. The cooling achieves a predefined target state of the sheet metal at a reference point at and/or after the exit from the cooling section, wherein coolant dispensing for a first and a second coolant dispensing device is determined, wherein the first and the second coolant dispensing devices are arranged opposite the sheet metal. Because the coolant dispensing for the first and second coolant dispensing devices is determined based on a predefined flow of heat to be dissipated from the sheet metal side that faces the respective coolant dispensing device, with a surface temperature of the respective sheet metal side being taken into account, the flatness of plate that is produced can be increased further with a simultaneously high throughput of the plate rolling train.
摘要:
The present invention provide a manufacturing method of a hot-rolled steel sheet capable of providing a target temperature for temperature of a rolled material in a final stand in a row of hot finishing mills, even when disposing a cooling device capable of cooling from inside the row of hot finishing mills. The method comprises: rapidly cooling the rolled material by spraying cooling water at inside of the final stand on a lower process side of the final stand in the row of hot finishing mills; obtaining an entry-side surface temperature of the rolled material on an entry side of the final stand; and calculating a target surface temperature on the entry side of the final stand, from a target surface temperature on the exit side of the final stand, based on generated heat and temperature reductions by contact of work rolls with the rolled material and by air cooling.
摘要:
The present invention provides a manufacturing apparatus of a hot-rolled steel sheet capable of cooling control of a steel sheet even when disposing a cooling device capable of cooling from inside a finishing mill.The manufacturing apparatus of a hot-rolled steel sheet comprises: an immediate rapid-cooling device capable of spraying cooling water, at least a part thereof being disposed inside a final stand in the row of hot finishing mills; a device for measuring a temperature on an entry side of a final stand; a device for measuring a steel sheet passing speed; a device for predicting a rapid-cooling stopping temperature which calculates a predicted rapid-cooling stopping temperature; and an immediate rapid-cooling control device which corrects the water supply volume or water supply pressure of the immediate rapid-cooling device such that the predicted rapid-cooling stopping temperature matches a targeted rapid-cooling stopping temperature.
摘要:
In the production of a seamless steel tube by piercing-rolling a heated billet with a piercing machine to form the billet into a hollow blank, and without reheating the hollow blank, by successively subjecting the hollow blank to elongation-rolling with an elongation-rolling mill and diameter-adjusting rolling by a diameter-adjusting rolling mill, it is made possible to prevent non-uniform longitudinal temperature distribution from occurring in a steel tube after diameter-adjusting rolling and enable energy saving to be accomplished by including a step 1 of measuring a temperature of the hollow blank along a longitudinal direction at the exit of the elongation-rolling mill; and a step 2 of spraying water onto the hollow blank to cool the hollow blank at the entrance of the diameter-adjusting rolling mill according to a measured longitudinal temperature distribution of the hollow blank, whereby the longitudinal temperature distribution of the hollow blank becomes uniform.
摘要:
The invention relates to a method and equipment for controlling flatness of a stainless steel strip in connection with cooling after annealing in a finishing line. The strip (1) is first in the direction of the strip movement (2) cooled feeding at least one cooling medium through at least one group of feeding devices (5, 6) located transversally to the direction of the strip movement for the whole width of the strip (1), the amount of the cooling medium being adjusted utilizing the recorded and predetermined data (7) of desired temperature of the strip for flatness, the temperature of the strip is then determined (8) and after the temperature determination a further step of cooling is carried out feeding at least one cooling medium through at least one group of feeding devices (9) located transversally to the direction of the strip movement (2), when the determined value of temperature is different from the predetermined value of temperature, before the flatness is controlled using a control device (11) containing a plurality of flatness control units (12) and locating transversally to the direction of the strip movement (2).
摘要:
a billet made of high Cr-high Ni alloy, which contains, by mass percent, 20 to 30% of Cr, 30 to 50% of Ni, and at least one element selected from Mo and W with a value “Mo+0.5W” of 1.5% or more is heated under conditions satisfying the following formula (1), and then the billet is pierced and rolled using an inclined roll type piercing mill with a roll gouge circumferential speed of 2.28 m/sec or higher. This prevents melted rash on the inner surface and lengthens the plug life. T≦1575−4.45×Vf−104.7×{−ln(th/ro)} (1) wherein T indicates a heating temperature (° C.) of the billet, Vf indicates the roll gouge circumferential speed (m/sec), ro indicates a radius (mm) of a billet at an entry-side, and th indicates a radial thickness (mm) of a pipe after piercing.
摘要:
a billet made of high Cr-high Ni alloy, which contains, by mass percent, 20 to 30% of Cr, 30 to 50% of Ni, and at least one element selected from Mo and W with a value “Mo+0.5W” of 1.5% or more is heated under conditions satisfying the following formula (1), and then the billet is pierced and rolled using an inclined roll type piercing mill with a roll gouge circumferential speed of 2.28 m/sec or higher. This prevents melted rash on the inner surface and lengthens the plug life. T≦1575−4.45×Vf−104.7×{−ln(th/ro)} (1) wherein T indicates a heating temperature (° C.) of the billet, Vf indicates the roll gouge circumferential speed (m/sec), ro indicates a radius (mm) of a billet at an entry-side, and th indicates a radial thickness (mm) of a pipe after piercing.