Graphene-containing cast iron inoculant and preparation method and using method thereof

An inoculant and graphene technology, which is applied in the field of cast iron inoculants, can solve the problems of large amount of inoculant added, the inability to use a large amount of recycled material, and the high content of Si in the recycled material, so as to prolong the inoculation recession time, good inoculation effect, and the added amount little effect

Pending Publication Date: 2019-05-21
JINAN SHENGQUAN GROUP SHARE HLDG
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  • Abstract
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Problems solved by technology

[0005] 1) The ability of the inoculant to promote graphitization is small, and sometimes the cementite cannot be completely eliminated;
[0006] 2) The amount of inoculant added is large;
[0007] 3) The...

Method used

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  • Graphene-containing cast iron inoculant and preparation method and using method thereof
  • Graphene-containing cast iron inoculant and preparation method and using method thereof
  • Graphene-containing cast iron inoculant and preparation method and using method thereof

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preparation example Construction

[0044] There are no special restrictions on the preparation method of the graphene. For example, a micromechanical exfoliation method, an epitaxial growth method, a chemical vapor deposition CVD method, a graphene oxide reduction method, etc. can be used. Graphene oxide (ie, graphene oxide) can be obtained by using strong oxidizing agents such as concentrated sulfuric acid, concentrated nitric acid, potassium permanganate and other graphite oxide. The reduced graphene oxide (ie, reduced graphene oxide) can be obtained by reducing the graphene oxide. There is no particular limitation on the reduction method, and hydrazine reduction method, sodium borohydride reduction method, 4C hydrothermal reduction method, etc. can be used. It should be noted that the oxygen content of graphene oxide is usually above 10% (weight percentage), and the graphene mentioned in this specification does not include such graphene oxide.

[0045] The inventor found that by including graphene in the cast i...

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Abstract

The invention relates to a graphene-containing cast iron inoculant and a preparation method and using method thereof. The invention provides the cast iron inoculant comprising 0.01%-10% by weight of graphene. When used for inoculation, the cast iron inoculant provided by the invention can achieve a better inoculation effect with a smaller addition quantity.

Description

Technical field [0001] The invention relates to an inoculant for cast iron. Specifically, the present invention relates to a cast iron inoculant containing graphene, and a method for preparing and using the cast iron inoculant. Background technique [0002] In the production of gray cast iron, in order to improve the mechanical properties of castings, it is necessary to reduce the content of carbon and silicon. This will form cementite during the solidification of the casting. The cementite has high hardness and brittleness, which reduces the mechanical properties and processing performance. In addition, nodularizing agent and vermicularizing agent are needed in the production of ductile iron and vermicular graphite cast iron, and they all strongly promote the formation of cementite. In order to eliminate the cementite in gray cast iron, ductile cast iron, and vermicular graphite cast iron, it needs to be inoculated, that is, a certain amount of inoculant is added to the molten ...

Claims

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Application Information

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IPC IPC(8): C21C1/08C21C7/00
Inventor 祝建勋张科峰
Owner JINAN SHENGQUAN GROUP SHARE HLDG
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