Tundish for preparing iron-based water-atomized soft magnetic alloy powders and manufacturing method of tundish

Abstract

The invention relates to a tundish for preparing iron-based water-atomized soft magnetic alloy powders and a manufacturing method of the tundish and belongs to the field of powder metallurgy. The tundish for preparing the iron-based water-atomized soft magnetic alloy powders comprises a tundish body; an alloy liquid containing part used for containing molten alloy liquid is formed in the tundish body; a liquid weeping hole is formed in the bottom surface of the tundish body for making the alloy liquid in the tundish body fall naturally; a protective coating is arranged on the inner wall of the tundish body for preventing the molten alloy liquid from corroding the tundish body. According to the tundish and the method, a high-performance and anti-drop coating tundish can be obtained by processing the inner wall of a clay tundish with aluminium dihydrogen phosphate adding aluminium oxide or aluminium dihydrogen phosphate adding zirconium oxide, so that the strength of the clay tundish is increased by the coating, and the clay tundish can be reused for 2-3 times, so that the production cost can be lowered; moreover, the falling of a tundish body refractory can be reduced, the quantity of inclusions in the iron-based soft magnetic alloy powders prepared by an atomization method can be reduced effectively, the property of the alloy powders can be improved and the condition can be reduced that the tundish body refractory falls off and blocks the tundish to make the atomization be interrupted.

Description

technical field [0001] The invention relates to a tundish for preparing iron-based water atomized soft magnetic alloy powder and a manufacturing method thereof, belonging to the field of powder metallurgy. The tundish can reduce the inclusions in the iron-based alloy soft magnetic powder prepared by the atomization method. Background technique [0002] Powder metallurgy is a green manufacturing technology for high-efficiency, no less cutting, material saving, energy saving, and complex parts. Metal and alloy powders are key raw materials for powder metallurgy mechanical parts. Water, gas, or even oil as the medium, high-speed impact on the molten metal flow, can produce metal / alloy powder in one step, the internal structure of the powder particles is uniform, the shape is diverse, the particle size range is wide, the process is short, and energy is saved. The mainstream means of large-scale milling. [0003] figure 1 It is a schematic diagram of the atomization powder mak...

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Problems solved by technology

[0013] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a tundish for preparing iron-based water atomized soft magnetic alloy powder and its manufacturing method, which can increase the strength of the clay tundish and reduce the clay tundish without significantly increasing the production cost. The shedding of the refractory material in the tundish reduces the non-metallic inclusions in the alloy powder; it can also reduce the interruption of the atomization due to the shedding of the refractory material in the process of preparing the iron-based soft magnetic alloy powder by the atomization method.

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