Alloy molten steel constant-pressure injection device and constant-pressure injection method

Abstract

The invention relates to an alloy molten steel constant-pressure injection device and a constant-pressure injection method. The invention provides a processing method for balancing pressure fluctuation caused by molten steel flowing (fluid) change through an automatic air pressure supplement way, and maintaining constant pressure intensity of a nozzle opening (water opening) by on-line adjusting the pressure of supplement air at any time. The invention is applied in the production of ultra-thin metal or alloy strips with the thickness of 18-35mumprepared by injecting alloy molten steel in a sealed steel ladle to the surface of a high-speed rotating cooling copper roller or a copper alloy roller in a continuous, pressure-constant and stable way, and molding at one time. The dimension accuracy of the alloy strips prepared by the invention is improved: the dimension accuracy of the alloy strips prepared by molten steel injection is improved, wherein the tolerance of the strip width is accurate to plus or minus 0.05mm from the original plus or minus 0.15mm, and the tolerance of the strip thickness is accurate to plus or minus 0.5mum from the original plus or minus 1.5mum; the surfaces of the alloy strips are level without single quotation mark wave single quotation mark shapes; the product qualification ratio is improved, and the qualification ratio of the alloy strips is improved to be more than 95 percent.

Description

technical field [0001] The invention belongs to the technical field of preparation of amorphous alloys, and in particular relates to a constant-pressure injection device and a constant-pressure injection method for molten alloy steel. Background technique [0002] In the process of continuous spraying of molten alloy steel to prepare metal strips, the geometric dimensions of the thin metal strips must be kept stable and the surface dense and smooth. However, this depends on the constant pressure of the liquid at the nozzle mouth (water outlet), so that the flow rate at the nozzle mouth can be kept stable. [0003] However, when the molten alloy steel is sprayed continuously in the ladle, as the liquid steel level drops (the self-weight of the molten steel gradually decreases), the pressure at the nozzle mouth gradually decreases, and the geometric size and surface of the sprayed metal thin strip are uniform. The density will change greatly, which directly leads to poor cons...

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Problems solved by technology

[0006] However, the above-mentioned patent application cannot guarantee the real-time detection and adjustment of the nozzle pressure, that is, the constant pressure of the nozzle cannot be guaranteed, resulting in that the quality of the amorphous strip is only improved to a certain extent, and the produced amorphous strip still exists. Quality defects of inconsistent size

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