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Formula of inoculant suitable for high-grade gray iron member and treatment method therefor

A treatment method and inoculation treatment technology, applied in the direction of improving process efficiency, etc., can solve the problems of low tensile strength and yield strength of gray iron parts, unreasonable formula composition and treatment method, and inoculant can not be uniformly dispersed, etc., to achieve Good inoculation effect, improvement of graphite morphology and distribution, and slowing down of decline

Inactive Publication Date: 2019-01-15
ANHUI DATIAN CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The current formula composition and treatment method of the inoculant are unreasonable, resulting in unstable inoculation effect, lower tensile strength and yield strength of gray iron parts produced by inoculation, and poor quality of gray iron parts. Uniformly dispersed into the molten iron, inoculated unevenly, brought greater trouble to the staff

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] An inoculant formulation suitable for high-grade gray iron pieces, the inoculant includes rare earth ferrosilicon and crude inoculant:

[0029] The rare earth ferrosilicon is composed of the following chemical components according to the mass percentage: Si 48%, Y 0.8%, Zr 0.8%, Mo 0.4%, Ti 0.4%, V 0.2%, Mn 0.5%, Co 0.6%, W 1.2% , the rest are Fe;

[0030] The crude inoculant is composed of the following chemical components according to mass percentage: Si 48%, Al 0.75%, Ca 0.5%, Sr 0.6%, and the rest is Fe.

[0031] The treatment method of the inoculant comprises the following steps:

[0032] (1) Add 16# pig iron, low-carbon scrap steel, return material, recarburizer and 62 ferromanganese into the smelting furnace, smelt for 40-50min to the temperature of molten iron to 1490-1510℃, remove impurities once, and then sample for It carries out spectral analysis, analyzes the content of each chemical component, adds 75 ferrosilicon according to the detection result, and c...

Embodiment 2

[0038] An inoculant formulation suitable for high-grade gray iron pieces, the inoculant includes rare earth ferrosilicon and crude inoculant:

[0039] The rare earth ferrosilicon is composed of the following chemical components according to mass percentage: Si 50%, Y 1.0%, Zr 1.0%, Mo0.6%, Ti 0.6%, V 0.4%, Mn 0.7%, Co 0.8%, W 1.4% , the rest are Fe;

[0040] The crude inoculant is composed of the following chemical components according to mass percentage: Si 50%, Al 1.0%, Ca 1.0%, Sr 0.8%, and the rest is Fe.

[0041] The treatment method of the inoculant comprises the following steps:

[0042](1) Add 16# pig iron, low-carbon steel scrap, return material, recarburizer and 62 ferromanganese into the smelting furnace, smelt for 40-50min until the temperature of the molten iron reaches 1490-1510℃, remove impurities once, and then take a sample It conducts spectral analysis to analyze the content of each chemical component, adds 75% ferrosilicon according to the test results, an...

Embodiment 3

[0048] An inoculant formula suitable for high-grade gray iron parts, the inoculant includes rare earth ferrosilicon and crude inoculant:

[0049] The rare earth ferrosilicon is composed of the following chemical components according to mass percentage: Si 52%, Y 1.2%, Zr 1.2%, Mo0.8%, Ti 0.8%, V 0.6%, Mn 0.9%, Co 1.0%, W 1.6% , the rest is Fe;

[0050] The crude inoculant is composed of the following chemical components according to mass percentage: Si 52%, Al 1.25%, Ca 1.5%, Sr 1.0%, and the rest is Fe.

[0051] The processing method of described inoculant comprises the following steps:

[0052] (1) Add 16# pig iron, low-carbon steel scrap, return material, recarburizer and 62 ferromanganese into the smelting furnace, smelt for 40-50min until the temperature of the molten iron reaches 1490-1510℃, remove impurities once, and then take a sample It conducts spectral analysis to analyze the content of each chemical component, adds 75% ferrosilicon according to the test results,...

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Abstract

The invention provides a formula of inoculant suitable for a high-grade gray iron member and a treatment method therefor, and relates to the technical field of inoculants. The inoculant includes rareearth silicon iron and an inoculant crude product. The rare earth silicon iron is composed of, by mass, 48-52% of Si, 0.8-1.2% of Y, 0.8-1.2% of Zr, 0.4-0.8% of Mo, 0.4-0.8% of Ti, 0.2-0.6% of V, 0.5-0.9% of Mn, 0.6-1.0% of Co, 1.2-1.6% of W, and the balanced being Fe. The inoculant crude product includes, by mass, 48-52% of Si, 0.75-1.25% of Al, 0.5-1.5% of Ca, 0.6-1.0% of Sr and the balanced being Fe. With various chemical components being filler in the inoculants, the inoculant can effectively alleviate recession of inoculation and increase the stability and enhances tensile strength of thegray iron member. Through pretreatment on the inoculant and addition of the inoculant for three times, graphitization of substances in molten iron is effectively improved. The inoculant has uniformity and good effect in inoculation.

Description

technical field [0001] The invention relates to the technical field of inoculant production, in particular to a formula and a processing method of an inoculant suitable for high-grade gray iron pieces. Background technique [0002] Gray iron is gray cast iron, gray cast iron refers to cast iron with flake graphite, because the fracture is dark gray when broken, so it is called gray cast iron. According to the shape of graphite, gray cast iron can be divided into: ordinary gray cast iron, graphite is flake; ductile iron, graphite is spherical; malleable cast iron, graphite is flocculent; vermicular graphite cast iron, graphite is vermicular. Gray iron is a kind of cast iron. There are many models of gray iron, and the high grade is one of many models of gray iron. [0003] Grey iron parts usually need to use an inoculant during the casting process. After a short period of time, there is a good effect. It is mainly suitable for general occurrence or late instantaneous inocu...

Claims

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Application Information

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IPC IPC(8): C21C1/08C22C33/08
CPCC21C1/08C22C33/08Y02P10/20
Inventor 张祥吴元立徐祥俊
Owner ANHUI DATIAN CASTING
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