Semisolid metal slurry preparation device and method

Abstract

The invention discloses a semisolid metal slurry preparation device and method. The semisolid metal slurry preparation device comprises an air supplying device body, an air guiding pipe, a stirring rod and a bearing container used for containing a metal melt. The end, stretching into the metal melt in the bearing container, of the stirring rod is a stirring end. The stirring end is internally provided with a cavity. The air supplying device body is used for injecting cooling gas into the cavity inside the stirring end through the air guiding pipe when the metal melt is stirred by the stirring rod, and a processing mode of cooling and stirring is formed, so that in the stirring and flowing processes of the metal melt, the internal temperature field is uniformly distributed basically, obvious too cold gradients are avoided, the dendritic crystal growth environment is destroyed, and thus semisolid slurry with a certain proportion of near-spheroidal primary solid phase uniformly distributed in a liquid phase matrix is obtained. According to the semisolid metal slurry preparation device and method, the semisolid slurry is continuously and rapidly prepared, and continuous working is stable and reliable; the process can be simplified, the cost is reduced, and the efficiency is improved; and the industrialized application of the semisolid metal processing technology is promoted.

Description

technical field [0001] The invention relates to the technical field of semi-solid metal processing, in particular to a semi-solid metal slurry preparation device and method. Background technique [0002] In the early 1970s, researchers such as M.C. Flemings of the Massachusetts Institute of Technology invented the semi-solid metal forming technology. Since then, the preparation and forming of semi-solid metal paste has attracted widespread attention and research from scholars all over the world. The preparation of semi-solid slurry is the foundation and key of semi-solid metal processing technology. According to the literature "Behavior of metal alloys in the semisolid state" (M.C.Flemings, Metall Trans, 1991, 22A:957-981), "Method and apparatus for shaping semisolid metals" (A.Mitsuru, S.Hiroto, H.Yasunori, et al. al,EP Patent,0745694A1,1996), "A novel technique to produce metal slurries forsemisolid metal processing", the name of the invention is "a suspension cone type s...

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Problems solved by technology

However, the disadvantage of this method is that the double-helix structure has poor screw working conditions, high consumption, and short life. It is only suitable for the preparation of magnesium alloy semi-solid slurry, and it is troublesome to clean and disassemble.

[0008] The above various methods for preparing semi-solid alloy slurry have their own characteristics, but they also have their own shortcomings. Most of them are still in the laboratory research stage, and new slurry making devices and technologies still need to be proposed in order to simplify the process. , reduce costs, improve efficiency, and promote the industrial application of semi-solid metal processing technology

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