摘要:
A device for measuring temperature and analyzing melt in metallurgical vessels with a channel pipe KN arranged on a side wall of a vessel KV, extending with a lower end thereof into this wall, and ending with an upper open end thereof above the vessel KV for taking a melt probe, which has, above an opening, an air inlet with an associated inlet/outlet valve VT and above it, a rotary valve DS that opens a cross-section of the channel pipe KN for introducing measuring probes, laser, or temperature feeler, and closes it.
摘要:
The invention relates to a method for the continuous casting of slab, thin slab, bloom, preliminary section, round section, tubular section or billet strands (1) and the like from liquid metal in a continuous casting plant (2) in which metal discharges perpendicularly downwards from a mould (3), wherein the metal strip (1) is then guided vertically downwards along a perpendicular strand guide (4) and is cooled in the process, wherein the metal strip (1) is then deflected from the vertical direction (V) into the horizontal direction (H) and wherein mechanical forming (5) of the metal strip (1) is effected in the final region of the deflection into the horizontal direction (H) or after the deflection into the horizontal direction (H). In order to obtain a surface which has as little scale as possible, provision is made according to the invention for the metal strip (1) to be cooled with a heat transfer coefficient of between 2500 and 20 000 W/(m2K) In a first section (6, 6A, 6B) in the conveying direction (F) of the metal strip (1) downstream of the mould (3) and upstream of the mechanical forming (5), wherein the surface of the metal strip (1) is heated to a temperature above Ac3 or Ar3 In the conveying direction (F) downstream of the cooling in a second section (7) by heat compensation in the metal strip (1) without or with reduced cooling of the surface of the metal strip (1), after which, in a third section (8), the mechanical forming (5) is effected. The invention also relates to a continuous casting plant, in particular for carrying out this method.
摘要:
The production of steels with high contents of manganese (Mn), aluminum (Al), and silicon (Si) with TWIP properties (Twinning-Induced Plasticity) by continuous casting is considered difficult or impossible in the present state of the art for various reasons. These reasons include low strength of the strand shell during solidification due to intense microsegregation of Mn, high strength at relatively low temperatures, reactions of the aluminum in the steel with the flux powder, macrosegregation, depletion of the alloying elements near the surface, and oxidation of the grain boundaries during the reheating of slabs in the pusher furnace. Therefore, in accordance with the invention, successively arranged process steps are used to cast light gauge steel with a given chemical composition of 15-27% Mn, 1-6% Al, 1-6% Si, ≦0.8% C, with the remainder consisting of Fe and accompanying impurity elements on a thin-slab casting machine (1) (d≦120 mm) with the use of suitable flux powders, to cut slabs (3) from the endless strand (2) immediately after solidification, to bring about temperature equalization in a continuous-type intermediate furnace (4), and then to hot roll the slab (3) immediately without intermediate cooling.
摘要:
A method for continuous casting from molten metal, where metal flows vertically downward from a mold and metal strip is then guided vertically downward along a vertical strand guide, cooling as it moves. The strip is deflected from the vertical direction to the horizontal direction. In the terminal area of the deflection of the strip into the horizontal direction or after the deflection into the horizontal direction, a mechanical deformation of the strip is carried out. The strip is cooled at a heat-transfer coefficient of 3,000 to 10,000 W/(m2 K) in a first section downstream of the mold and upstream of mechanical deformation of the strip. In a second section, downstream of the cooling, the strip surface is heated to a temperature above Ac3 or Ar3 by heat equalization in the strip. The mechanical deformation is subsequently carried out in a third section.
摘要:
A method for continuous casting from molten metal, where metal flows vertically downward from a mold and the metal strip is then guided vertically downward along a vertical strand guide, cooling as it moves. The strip is then deflected from the vertical direction to the horizontal direction. In the terminal area of the deflection of the strip into the horizontal direction or after the deflection into the horizontal direction, a mechanical deformation of the strip is carried out. The strip is cooled at a heat-transfer coefficient of 3,000 to 10,000 W/(m2 K) in a first section downstream of the mold and upstream of the mechanical deformation of the strip. In a second section, downstream of the cooling, the surface of the strip is heated to a temperature above Ac3 or Ar3 by heat equalization in the strip, after which the mechanical deformation is carried out in a third section.