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US 4,729,421 AGranted
Method and device for the production of metal blocks, castings or profile material with enclosed hard metal grains
OwnerWerner Schatzinventor
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OwnerWerner Schatzinventor
Estimating the term…
Process and apparatus for the production of metal blocks, castings or profile material (14) during which molten metal (S3) in a chill (K) is moved from a heating zone (HZ) into a cooling zone according to the solidification speed of the molten metal (S3) and during which cooling time hard material grains are continuously fed through the heating zone (HZ), preferably being electrical heated molten slag (12), the temperature of which is above the melting point of the hard material, into the molten metal (S3), the temperature of which is lower than the melting point of the hard material. The temperature of the molten slag, the height (h) of it and the height of the molten metal is controlled by the control device (ST) controlling the electrical current and dosing of the materials currents. Control methods and devices as well as material selections for matrix and doping materials are described.
In a process for the manufacture of metal blocks, castings, or profile material from molten metal which is transferred in a chill from an upper heating zone into a lower cooling zone, cooled by water with such a speed theat the solidification of the molten metal proceeds, the process including continuously feeding a grain material from the upper heating zone onto the surface of the molten metal, the improvement which comprises selecting a hard material having a higher density than the molten metal, maintaining a temperature below that of the melting temperature of the hard material, maintaining the heating zone at a temperature which is higher than the melting point of the hard material grains, passing the hard material grains with a speed through the heating zone such that the grains melt on their surface to a depth of just about a micrometer before entering the molten metal, and feeding the grains in a given distribution pattern onto the surface of the molten metal.
In an apparatus for the manufacture of metal blocks, castings, or profile substances solidified from molten metal including a widening chill of a first material, being cooled by flowing water, and extending on top of the molten metal surrounding a space for keeping a molten slag which has at least a given height, and a grain material dosing device for feeding a grain material to the slag, the improvement comprising the chill surrounding the molten slag and widening in the shape of a funnel ending in a rim composed of a second material, said second material being a less heat conducting material than the first material of the chill, the grain material dosing device having an outlet connected to a shuttle or a circulating device for performing a movement of an amplitude reaching near to the rim, the apparatus further comprising (a) a molten metal dosing device, (b) a slag powder dosing device, (c) a holder mounted on a feeding and shuttle device for an electrode and the grain material dosing device, and (d) an extracting device disposed underneath of the chill.
Dependencies are inferred from the claim text.