Manufacturing method for lost foam casting of high-chrome agitator blade

Abstract

The invention discloses a manufacturing method for lost foam casting of a high-chrome agitator blade. According to the method, the lost foam casting is adopted to mould and manufacture a core and a medium-frequency induction furnace is used for smelting molten iron, so that the qualified molten iron is smelted in the medium-frequency induction furnace; the method comprises the following steps: arranging a rare earth silicon alloy with the mass of the molten iron of 0.5% in a ladle in advance; crushing the rare earth silicon alloy into small blocks; pouring the molten iron into the ladle for modification; then casting and molding, and cleaning a casting; and finally, heating the high-chrome agitator blade in an electric box furnace so as to partially dissolve a carbide to obtain a matrix structure which takes bainite as a main body. Compared with an air-cooling quenching and low-temperature tempering process, the production process of the high-chrome agitator blade provided by the invention uses the modification of rare earth and quenching of an oil bath, so that the hardness of cast iron and the impact toughness can be obviously improved, and the wear resistance is obviously improved; the manufacturing method has the advantages of simplicity and convenience in process, easiness in operation, developed process, convenience in industrial production and low cost due to no adding of expensive molybdenum alloy.

Description

technical field [0001] The invention belongs to the technical field of casting, and in particular relates to a method for manufacturing high chromium mixer blades of lost foam casting. Background technique [0002] The mixer blade is the key factor affecting the performance and service life of the mixer. The existing conventional casting process of the mixer blade is air-cooled quenching and low temperature tempering. The disadvantage of this conventional casting process is that the hardness and impact performance of cast iron are not high. Poor wear resistance greatly affects the performance and life of the mixer. Contents of the invention [0003] The purpose of the present invention is to provide a manufacturing method of lost foam casting high chromium blender blades, aiming at improving the hardness and impact performance of the blender blades, enhancing the wear resistance of the blender blades, improving the performance of the blender, and prolonging the life of the...

AI Technical Summary

Problems solved by technology

[0002] The mixer blade is the key factor affecting the performance and service life of the mixer. The existing conventional casting process of the mixer blade is air-cooled quenching and low temperature tempering. The disadvantage of this conventional casting process is that the hardness and impact performance of cast iron are not high. Poor wear resistance greatly affects the performance and life of the mixer

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