High phosphorous cast iron inoculating treatment method device in vacuum induction furnace

Abstract

The invention discloses a high phosphorous cast iron inoculating treatment method device in a vacuum induction furnace, and belongs to the technical field of metallurgy process. The high phosphorous cast iron inoculating treatment method in the vacuum induction furnace comprises the steps of loading industrial pure iron into a hearth of the induction furnace; sealing the induction furnace in a vacuum chamber; exhausting air in the vacuum chamber, and maintaining in a vacuum state; heating for melting industrial pure iron in the induction furnace, and alloying molten iron; adding a nucleating agent into the alloyed molten iron, introducing inert gas to the bottom of the hearth, and stirring the molten iron with the nucleating agent by virtue of the inert gas; stopping the blowing of the inert gas after the nucleating agent is completely molten, and pouring the molten iron. By adopting the high phosphorous casts iron inoculating treatment method and device in the vacuum induction furnace, the oxidation burning of an alloy and nucleating agent can be effectively prevented, the yield is high, the inoculating treatment effect can be rapidly completed, and the uniformity in the inoculating treatment can be improved.

Description

technical field [0001] The invention relates to the technical field of metallurgical technology, in particular to a method and device for inoculating high-phosphorus cast iron in a vacuum induction furnace. Background technique [0002] High-phosphorus cast iron has the advantages of good wear resistance, high hardness, and good heat dissipation, and is widely used in the field of brake materials. Due to the high phosphorus content, phosphorus eutectic crystals are easily formed in the as-cast structure, which increases the brittleness of cast iron. Therefore, inoculants such as rare earth alloys must be used to inoculate during the casting process of cast iron to break the network phosphorus eutectic and reduce the cast iron brittleness. [0003] Inoculation treatment refers to adding a small amount of other substances to the liquid metal during the solidification process of cast iron molten iron to promote nucleation, inhibit growth, and achieve the purpose of refining gr...

AI Technical Summary

Problems solved by technology

[0005] (1) The entire smelting and inoculation process is in an open environment, and the alloy and inoculant are severely oxidized when exposed to air in a high-temperature environment, and the yield is not high;

[0006] (2) During the inoculation process, splashing may even occur during stirring, the site environment is harsh, the treatment effect is not good, and the safety is poor

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