Vermiculizer for preparing vermicular graphite cast iron and preparation method thereof

Abstract

The invention discloses a vermiculizer for preparing vermicular graphite cast iron, and belongs to the field of cast iron material production. The vermiculizer solves the problems that an existing vermiculizer is not high in vermicular rate and is unstable in reaction during preparation of vermicular graphite cast iron. The vermiculizer is prepared by melting rare earth magnesium and a rare earth silicon-iron alloy, and consists of the following element components in parts by mass: 14-20 parts of rare earth, 36-40 parts of silicon, 4-10 parts of magnesium, the balance iron and a little impurity elements. A preparation method for the vermiculizer comprises the following steps of: (1) preparing the rare earth magnesium and the rare earth silicon-iron alloy into raw materials with grain size being about 5-10 mm; (2) weighing weight of each raw material according to component proportion of set elements; and (3) smelting for 60 minutes in a vacuum induction furnace, and cooling to obtain the rare earth magnesium-silicon-iron alloy vermiculizer. The vermiculizer can be used for producing vermicular iron parts.

Description

technical field [0001] The invention belongs to the field of cast iron material production, and in particular relates to a vermicular agent for preparing vermicular graphite cast iron and a preparation method thereof. Background technique [0002] Vermicular graphite cast iron is a new type of engineering material developed in recent years. Its graphite form is between the flake graphite of gray cast iron and the spherical graphite of nodular cast iron. High difficulty. If the creep treatment is excessive, it becomes ductile iron; if the creep is insufficient, it becomes gray cast iron. Therefore, the vermicular agent is one of the most important factors in the preparation of vermicular graphite cast iron. In order to obtain the ideal vermicular effect, the parameters of each production process must be well controlled. Contents of the invention [0003] The present invention provides a vermicular agent for preparing vermicular cast iron and a preparation method thereof i...

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Problems solved by technology

[0003] The present invention provides a vermicular agent for preparing vermicular cast iron and a preparation method thereof in order to solve the problem that the vermicularization rate of the existing vermicularizing agent is not high and the reaction is not stable when preparing vermicular graphite cast iron, which can not only improve the vermicularization rate, It can also make the produced vermicular graphite cast iron have good plasticity and toughness, less whitening tendency, and low production cost

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