摘要:
An inversion casting device with a crystallizer which has a slit-shaped passage for guiding a substrate strip, this passage being arranged in the base and provided with a seal, and which communicates with a melt feed. A collecting tank is provided which passes horizontally about the crystallizer vessel so that the collecting tank communicates with nozzles (23) arranged in the region of the passage. The nozzle orifices are so arranged that the melt flowing out strikes the substrate strip at a flat angle of inclination .alpha. in the strip take-off direction.
摘要:
A device and a process for producing thin steel metal bars in which an elongated metal product is brought into contact with a molten metal causing the latter to crystallize. Different materials are used for the elongated metal product and the molten metal, whereby one of the materials is a stainless steel. A temperature of the elongated metal product, a temperature of the molten metal and a dwelling time of the elongated metal product in the molten metal are set in such a way that the molten metal crystallizes on the elongated metal product so as to form a layer having a thickness of 2% to 20% of a thickness of the elongated metal product.
摘要:
An inversion casting vessel includes a melt-filled container with a hole in the floor through which a metal strip is drawn. As the strip is drawn through the container, crystallization of the melt on the metal strip occurs, thereby forming a metal strand. The hole in the floor is a slit shaped channel through which the strip is run in a low-contact manner. The container also includes a cooling device for cooling the melt in the area of the slit shaped channel. The cooling device maintains the temperature of the melt around the channel to create a two-phase field of the melt, one of the phases being crystal, making up 50%-90% of the two phase field. The metal strip first contacts the melt at the two-phase field of the melt as the strip is run through the melt container.
摘要:
Molten steel is poured into a water cooled continuous casting mold in which the steel solidifies partially with the formation of a strand having a length and a peripheral shell. The strand has a cross-sectional surface area with one of a round shape, an oval shape and a polygonal shape having more than four sides. Additionally, the strand has a minimum circumference of 200 mm. The cross-sectional surface area of the strand leaving the mold is then reduced using rolls before the strand fully solidifies. The reducing includes deforming the strand into a polygonal shape having at least four corners while maintaining the circumference as well as the length of the strand at the peripheral shell constant.
摘要:
A method of controlling a hot face temperature of a copper plate of a mold for continuous casting of steel with variable casting rates and including: providing a bypass line for connecting a mold water outlet with a mold water inlet for obtaining, at the mold water inlet a mixture of heated mold water and cooled mold water, which mixture is fed into the mold as a cooling water having a chageable temperature depending on casting conditions; providing, at the mold water outlet, a two-way valve connectable with the bypass line and a heat exchanger for cooling the heated mold water for distributing the heated mold water between the bypass line and the heat exchanger with; and control of the operation of the two-way valve in accordance with the exit water temperature to maintain a constant predetermined water temperature at the mold water outlet, whereby a constant hot face temperature is maintained.
摘要:
The invention relates to a method for automatically opening a high-speed continuous casting plant According to said method the stopping or slide movement, the modification of the steel level, the heat currents through the mold walls, the temperature of the liquid metal and the drawing-off speed are measured over the casting time, supplied to a computer and compared with predetermined limit values for an automatic operating mode.
摘要:
A continuous caster is controlled by a method anticipating the liquidus temperature in the mold of the caster to prevent premature solidification. The temperature in the tundish is measured and based upon the tundish temperature and the resistance time of the molten metal in the tundish, an equivalent liquidus temperature window is defined and the speed of the continuous caster is controlled to maintain this window of operation of the tundish.
摘要:
A system provided in a high-speed continuous casting plant for casting a metallic strand for automatically operating the high-speed continuous casting plant. In the system, the stopping or slide movement, the modification of the steel level, the heat currents through the mold walls, the temperature of the liquid metal and the drawing-off speed are measured over the casting time, supplied to a computer and compared with predetermined limit values for an automatic operating mode.
摘要:
A process for producing a steel strip with properties of a cold-rolled product. The process including comprising the sequential steps of: a) producing a thin slab 30 to 100 mm thick from a steel melt by continuous casting in a continuous casting machine, and, after a cast strip emerges from a mold of the continuous casting machine, cast rolling the cast strip with a liquid core to reduce thickness of the cast strip by at least 10%; b) descaling the thin slab produced according to step a); c) hot rolling the descaled thin slab at temperatures in a range of 1150.degree. to 900.degree. C. for reducing thickness by at least 50% to produce an intermediate strip with a maximum thickness of 20 mm; d) after hot rolling, accelerated cooling of the intermediate strip to a temperature in a range of 850.degree. to 600.degree. C.; e) rolling down the cooled intermediate strip by isothermic rolling at 850.degree. to 600.degree. C. on a finishing train with at least three stands into strips with a maximum thickness of 2 mm, whereby the strip thickness is reduced by at least 25% per roll pass; and f) subsequently cooling the isothermic rolled steel strip in accelerated fashion to a temperature no greater than 100.degree. C.
摘要:
A mother strip with a metallically pure surface is passed through a melt bath of a metal and whereby the coating is smoothed by rolling immediately after leaving the melt bath. The mother strip, having been preheated, to a temperature clearly above ambient temperature, especially above 200.degree. C., is introduced into the metal bath. The preheating is carried out by indirect heat exchange with the melt bath in an oxygen-free environment. The melt freshly supplied to the melt bath has an increased temperature in accordance with the heat lost due to preheating.