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A kind of inoculant of gray cast iron and preparation method thereof

An inoculant and gray cast iron technology, applied in the field of gray cast iron, can solve the problems of poor mechanical properties such as strength and toughness, and achieve the effects of prolonging the inoculation effect, promoting tissue, and improving sensitivity

Active Publication Date: 2021-11-23
湖北新兴全力机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Gray cast iron itself has good wear resistance, thermal conductivity, shock absorption, oxidation resistance, etc., and the melting cost of gray cast iron is low, and the production process is relatively simple, but its mechanical properties such as strength and toughness are poor.

Method used

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  • A kind of inoculant of gray cast iron and preparation method thereof

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Effect test

Embodiment 1

[0023] The cast iron uses a rare earth silicon barium calcium inoculant, the rare earth elements are antimony and vanadium, and the weight percentage of its chemical composition is as follows: Si 38%, Ca 0.8%, Al 1%, Ba 0.8%, Cr 9 %, Sb 0.009%, V 0.006%, and the rest is iron. Among them, silicon barium calcium is selected from alloys, aluminum is selected from metal aluminum, chromium is selected from metal chromium, antimony is selected from metal antimony, vanadium is selected from metal vanadium, and iron is selected from scrap steel.

[0024] Weigh the raw materials such as silicon-barium-calcium alloy, metal aluminum, metal chromium, metal antimony and metal vanadium according to the ratio of the above chemical components, and break them into small pieces, put them into an electric furnace for melting, and the melting temperature is 1480-1520°C , the time is 25-35min; during the smelting process of raw materials, it is necessary to continuously stir so that the raw materi...

Embodiment 2

[0026] The cast iron uses a rare earth silicon barium calcium inoculant. The rare earth elements are antimony and vanadium. The weight percentage of its chemical composition is as follows: Si 40%, Ca 2.2%, Al 1.2%, Ba 2.2%, Cr 10 %, Sb 0.01%, V 0.008%, and the rest is iron. Among them, silicon barium calcium is selected from alloys, aluminum is selected from metal aluminum, chromium is selected from metal chromium, antimony is selected from metal antimony, vanadium is selected from metal vanadium, and iron is selected from scrap steel.

[0027] Weigh the raw materials such as silicon-barium-calcium alloy, metal aluminum, metal chromium, metal antimony and metal vanadium according to the ratio of the above chemical components, and break them into small pieces, put them into an electric furnace for melting, and the melting temperature is 1480-1520°C , the time is 25-35min; during the smelting process of raw materials, it is necessary to continuously stir so that the raw material...

Embodiment 3

[0029] The cast iron uses a rare earth silicon barium calcium inoculant. The rare earth elements are antimony and vanadium. The weight percentage of its chemical composition is as follows: Si 42%, Ca 2.4%, Al 1.4%, Ba 2.4%, Cr 11 %, Sb 0.02%, V 0.009%, and the rest is iron. Among them, silicon barium calcium is selected from alloys, aluminum is selected from metal aluminum, chromium is selected from metal chromium, antimony is selected from metal antimony, vanadium is selected from metal vanadium, and iron is selected from scrap steel.

[0030] Weigh the raw materials such as silicon-barium-calcium alloy, metal aluminum, metal chromium, metal antimony and metal vanadium according to the ratio of the above chemical components, and break them into small pieces, put them into an electric furnace for melting, and the melting temperature is 1480-1520°C , the time is 25-35min; during the smelting process of raw materials, it is necessary to continuously stir so that the raw material...

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Abstract

The invention relates to the field of gray cast iron. It is an inoculant for gray cast iron and a preparation method thereof. The chemical composition and mass percentage of the inoculant are: Si 38-42%, Ca 0.8-2.4%, Al 1.5% or less, Ba 0.8-2.4%, Cr 9-11%, Sb 0.03% or less, V 0.1% or less, The rest is Fe. The inoculant of the present invention adds antimony and vanadium elements by compounding rare earth silicon barium calcium elements, and while giving full play to the advantages of each element, it further reduces defects such as slag holes, shrinkage porosity, shrinkage cavities and pores through synergistic effects, and promotes graphite It can form fine A-type graphite, promote uniform structure, eliminate the tendency of white mouth, improve the sensitivity of castings, and prolong the inoculation effect, and at the same time weaken the splitting effect of flake graphite on the matrix, reducing eutectic solidification period of expansion.

Description

technical field [0001] The invention relates to the field of gray cast iron. It is an inoculant for gray cast iron and a preparation method thereof. Background technique [0002] Gray cast iron itself has good wear resistance, thermal conductivity, shock absorption, oxidation resistance and other characteristics, and the melting cost of gray cast iron is low, and the production process is relatively simple, but its mechanical properties such as strength and toughness are poor. At the same time, in the brake parts of auto parts, the car is subjected to huge friction and thermal shock during operation. Brake parts often rub against other parts. For parts with high wear coefficient, gray cast iron is usually used for casting, but On the other hand, it is necessary to ensure the mechanical properties of the parts. Therefore, in order to solve the short plate with weak mechanical properties of gray cast iron, the mechanical properties of gray cast iron are usually improved by a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/08C21C1/08C22C38/06C22C38/34C22C38/60
CPCC21C1/08C22C33/08C22C38/002C22C38/06C22C38/34C22C38/60Y02P10/20
Inventor 李铁良续立忠王道明李浩华程品林彭成义
Owner 湖北新兴全力机械有限公司