PREVENTING GRAPHITE DEGENERATION UNDERNEATH TOP FEEDERS USED WITH METAL COVERS

Abstract

The invention is a design for preventing graphite degeneration under the top feeders (10) used with metal covers (30) in the iron casting industry, and its feature is that it includes a cover (31) coated with powdered magnesium to prevent graphite degeneration under the aforementioned feeders (10).

Description

1 Specifications UNDERNEATH TOP FEEDERS USED WITH METAL COVERS PREVENTING OBSERVED GRAPHITE DEGENERATION Technical Area The invention relates to 5 top feeders used with metal covers in the iron casting industry. This involves preventing the degeneration of graphite seen underneath. Previous technique To prevent shrinkage and collapse waste in the production of spheroidal graphite cast irons. The metal covers of the overhead feeders used for this purpose are manufactured from sheet metal parts. These nutrients heat the area they supply too much during solidification, and that 10 In the region, surface Mg reacts with O (oxygen) and S (sulfur) This leads to its depletion. As a result, graphite degeneration occurs. It is seen. Graphite degeneration observed under metal-capped top feeders resulted in 15 Because the desired microstructural and mechanical properties could not be achieved from the parts. The parts are being discarded. Normally, the lid material used in feeders with metal lids is Mg. It does not contain S. Due to high temperatures during solidification, Mg does not contain S. And Mg is depleted by reacting with O. 20 Disclosure of the Invention The aim of the invention is to create a different structure compared to those used in current technology. It is the creation of a structure in which the technique is used. The purpose of the invention is to coat metal caps with powdered magnesium and / or 25 This involves bonding the metal caps together with powdered magnesium coating and / or other adhesives. Mg that is depleted due to high temperature during solidification when bonded 2 Instead, by providing magnesium powder support in the lid, graphite under the nutrients. the prevention of degeneration. This invention addresses graphite degeneration observed under metal-capped feeders. to prevent the resulting microstructural defects and poor mechanical properties This prevents parts from becoming scrap by passing them through. 5 Another purpose of the invention is to prevent parts from being discarded during production. The goal is to minimize the resulting costs. Figures that will help understand the invention. Figure 1; A representative two-dimensional view of the feeder and lid. 10 Figure 2; Representative two-dimensional view of the feeder and powdered magnesium coated lid. It is the appearance. Figure 3; The required microstructure of spheroidal graphite cast iron. is being displayed. Figure 4; Microstructure resulting from graphite degeneration under feeder 15 is being displayed. Reference Numbers 10-Nutritious 20-Liquid metal 30-Metal cover 31- Coated lid 3 Detailed Description of the Invention Figure 1 shows a two-dimensional representation of the feeder (10), liquid metal and metal cover (30). Its appearance is illustrated. With this invention, in the iron casting sector, metal Graphite seen under the top feeders (10) used with the cover (30). A structure is being established to prevent its degeneration. 5 The invention in question is designed to prevent graphite degeneration under the feeder (10). It includes a lid (31) coated with powdered magnesium. This metal lid (30) magnesium applied to the lid using adhesive technique according to preference The layer is being fixed. 10 As a result of coating the metal lid (30) with magnesium; the nutrients (10) microstructural defects resulting from graphite degeneration seen underneath and preventing parts from being wasted by avoiding poor mechanical properties. is being blocked. 15 On the other hand, coating metal caps (30) with powdered magnesium and / or depleted due to high temperature during solidification by bonding Instead of magnesium, the powdered magnesium in the cap provides nutritional support (10) This prevents graphite degeneration underneath. 20 Figure 3 shows the required microstructure of spheroidal graphite cast iron. It is shown in Figure-4. Graphite degeneration under Feeder (10). The resulting microstructure is shown in the image.

Claims

4 REQUESTS 1- The invention is a top used with a metal cap (30) in the iron casting industry. graphite degeneration seen under the feeders (10) It is a structure related to preventing, and its feature is; the mentioned nutrient (10) 5 with magnesium powder to prevent graphite degeneration underneath. It contains a coated lid (31). 2- It is a structure in accordance with Request 1, and its feature is the aforementioned metal cover (30) a 10 containing magnesium fixed by an adhesive technique It contains layers.

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