A kind of manufacturing process of high toughness ledeburitic malleable cast iron

Abstract

The invention belongs to the technical field of malleable cast iron, in particular to a high-toughness ledeburite malleable cast iron; the hot-melt device includes a hot-melt box and an impurity removal mechanism; a box cover is installed on the top end of the hot-melt box; the box cover A supercharger is installed on the upper surface, and the supercharger is electrically connected to the controller through wires; the cavity in the hot melting tank is designed to be inclined; the bottom end of the hot melting tank is fixedly connected to a motor; the motor drives The shaft is fixedly connected with a lead screw; the present invention is mainly used to solve the problem that the current hot-melt device usually puts the raw material into the hot-melt device for hot-melting, and then discharges the gas doped in the raw material by stirring. This method cannot completely discharge the gas doped in the raw material, so that there will be a cavity in the malleable cast iron after pouring. danger, and the problem of incomplete removal of impurities.

Description

technical field [0001] The invention belongs to the technical field of malleable cast iron, in particular to a manufacturing process of high-toughness ledeburite malleable cast iron. Background technique [0002] Cast iron is a general term for alloys mainly composed of iron, carbon and silicon. Cast iron can be divided into: gray cast iron, white cast iron, malleable cast iron, nodular cast iron, vermicular cast iron and alloy cast iron. Malleable cast iron White cast iron is a kind of high-strength and tough cast iron obtained by graphitization annealing. It has high strength, plasticity and impact toughness, and can partially replace carbon steel. Compared with gray cast iron, malleable cast iron has better strength and plasticity, especially better low-temperature impact performance, and better wear resistance and vibration damping than ordinary carbon steel. Because of its certain plasticity and toughness, this kind of cast iron is commonly known as malleable iron, h...

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Problems solved by technology

[0006] In order to make up for the deficiencies in the prior art, the invention proposes a high-toughness ledeburite malleable cast iron manufacturing process. Stirring is used to discharge the doped gas in the raw material. However, this method cannot completely discharge the doped gas in the raw material, so that there will be a cavity in the malleable cast iron after pouring. Remove the impurities in the molten iron, which will cause a certain danger to the staff, and at the same time the problem of incomplete removal of impurities

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