Seamless solid core aluminum-calcium core-spun yarn and production system and method thereof

Abstract

The invention discloses a seamless solid core aluminum-calcium core-spun yarn and a production system and method thereof, and belongs to the technical field of core-spun yarns. The core-spun yarn comprises an inner core and a sheath wrapping the surface of the inner core. The sheath is a metal aluminum pipe which is a seamless metal aluminum pipe formed by conducting extrusion punching on an aluminum bar. The production system comprises a dummy ingot extruding head, a heating furnace and a punching extruder. The to-be-machined aluminum bar sequentially passes through the heating furnace and the punching extruder. The heating furnace is used for heating the aluminum bar. The punching extruder is used for conducting punching extrusion on the heated aluminum bar to form the seamless metal aluminum pipe. The to-be-wrapped inner core penetrates into the aluminum bar through the dummy ingot extruding head. By means of the core-spun yarn, the complete, seamless and tight wrapping of the sheath is achieved, the sealing performance is good for the inner core, the oxidation failure of alloy elements in the inner core can be effectively avoided, and the yield of alloy elements of the inner core in molten steel can be increased by 8-10%.

Description

technical field [0001] The invention belongs to the technical field of alloy cored wire, and more specifically relates to a seamless solid aluminum-calcium cored wire and its production system and production method. Background technique [0002] With the advancement of steelmaking technology, especially the development of molten steel refining technology, the production of high-purity, high-quality, high-grade steel has become possible. Low-carbon aluminum-killed steel and some steel types that require extremely high purity mainly use LF-VD or RH furnaces to refine molten steel, and use wire feeding to deform inclusions in molten steel, thereby further improving the purity of molten steel , improve the pourability of molten steel, and can significantly increase the yield of alloys, reduce alloy consumption and steelmaking costs, shorten smelting time, and have significant economic benefits. [0003] At present, the alloy cored wires widely used in steel mills include calciu...

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Problems solved by technology

[0009] The purpose of the present invention is to overcome that the outer layer steel strip of the existing aluminum-calcium cored wire is not tightly coated on the inner layer core powder (wire), and the sealing performance is relatively poor, thus causing calcium in the core powder (wire) to easily occur. Oxidation failure or calcium grade reduction prevents the cored wire from being stored for a long time, or when high-frequency seamless welding is used, the high temperature generated at the welding site will inevitably cause oxidation on the surface of the inner core calcium wire, thereby reducing the calcium grade and content , as well as the problem of easy wire breakage in the wire feeding process and low calcium yield, a seamless solid aluminum-calcium cored wire and its production system and production method are provided

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