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Silicon-zirconium-manganese-chromium inoculant for cast iron and preparation method thereof

A technology of inoculant and cast iron, applied in the field of silicon-zirconium-manganese-chromium inoculant for cast iron and its preparation, can solve the problems of affecting the quality of molten iron, inconsistent performance of castings, existing components, etc., so as to increase the graphitization core and improve the formation of Number, effect of thinning dendrites

Inactive Publication Date: 2019-07-19
JIANGSU YAFENG ALLOY MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The existing inoculation treatment has the following disadvantages: 1. The composition of the mechanically mixed inoculant is uneven, there is component segregation, and the performance of the produced castings is inconsistent; 2. The actual use effect of the mixed inoculant is often not as good as the effect of using a single inoculant Obviously, the due effect of the elements in the inoculant cannot be played well; 3. The inoculation effect of the higher calcium and aluminum content on the molten iron is poor, and the calcium and aluminum have a strong reducing effect, and the sulfur in the molten iron React with oxygen to form oxide slag, affecting the quality of molten iron

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The silicon-zirconium-manganese-chromium inoculant for cast iron comprises the following components by weight percentage:

[0039] Silicon 62%;

[0040] Zirconium 5%;

[0041] Manganese 6%;

[0042] Chromium 6%;

[0043] Calcium 4%;

[0044] Iron 17%.

[0045] Ferrosilicon alloy (silicon content is 84-94%, iron content is 10-15%), silicon-zirconium alloy (silicon content is 76-83%, zirconium content is 10-20%), silicon-manganese alloy (silicon content is 10-20%) 82-90%, manganese content is 15-20%), ferrochromium and metallic calcium, and broken into small pieces; then put into medium frequency induction furnace for smelting, melting temperature is 1300-1400℃, time is 20-30min, smelting During the process, constant stirring is required to fully mix the raw materials; after smelting, the slurry is poured into a water-cooled mold filled with inert protective gas; after the ingot is cooled, it is crushed and granulated.

Embodiment 2

[0047] The silicon-zirconium-manganese-chromium inoculant for cast iron comprises the following components by weight percentage:

[0048] Silicon 60%;

[0049] Zirconium 12%;

[0050] Manganese 5%;

[0051] Chromium 5%;

[0052] Calcium 3%;

[0053] Iron 15%.

[0054] Ferrosilicon alloy (silicon content is 86-95%, iron content is 15-20%), silicon-zirconium alloy (silicon content is 85-90%, zirconium content is 10-15%), silicon-manganese alloy (silicon content is 10-15%) 90% to 95%, manganese content is 10% to 15%), ferrochromium and metallic calcium, and broken into small pieces; then put into an intermediate frequency induction furnace for melting, the melting temperature is 1300-1400°C, and the time is 20-30min. During the process, constant stirring is required to fully mix the raw materials; after smelting, the slurry is poured into a water-cooled mold filled with an inert protective gas; the ingot is cooled and then crushed and granulated.

Embodiment 3

[0056] The silicon-zirconium-manganese-chromium inoculant for cast iron comprises the following components by weight percentage:

[0057] Silicon 65%;

[0058] Zirconium 3%;

[0059] Manganese 8%;

[0060] Chromium 6%;

[0061] Calcium 3%;

[0062] Iron 15%.

[0063] Ferrosilicon alloy (silicon content is 85-90%, iron content is 10-20%), silicon-zirconium alloy (silicon content is 85-95%, zirconium content is 15-25%), silicon-manganese alloy (silicon content is 85-90%, manganese content is 15-25%), ferrochrome and metallic calcium, and broken into small pieces; then put into medium frequency induction furnace for smelting, melting temperature is 1300-1400℃, time is 20-30min, smelting During the process, constant stirring is required to fully mix the raw materials; after smelting, the slurry is poured into a water-cooled mold filled with an inert protective gas; the ingot is cooled and then crushed and granulated.

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Abstract

The invention discloses a silicon-zirconium-manganese-chromium inoculant for cast iron and a preparation method thereof. The silicon-zirconium-manganese-chromium inoculant comprises the following components of, in percentage by weight, 60%-70% of silicon, 3%-12% of zirconium, 4%-10% of manganese, 5%-9% of chromium, 3%-6% of calcium and 15%-25% of iron. According to the silicon-zirconium-manganese-chromium inoculant, the elements of silicon, zirconium, manganese and chromium are recombined, the synergistic effect is further performed while the self-inoculation capacity of all the elements is exerted, a graphitized core is added, the formation quantity of graphite nodules is greatly improved, the graphite nodules are refined, the graphite in the ductile iron is promoted to tend to be complete, the melting point of a multi-element alloy is reduced, so that the multi-element alloy is convenient to diffuse and absorb in molten iron, the austenite dendritic crystal is refined, and the strength of the cast iron is improved.

Description

technical field [0001] The invention relates to a silicon-zirconium-manganese-chromium inoculant for cast iron and a preparation method thereof, belonging to the technical field of casting. Background technique [0002] Cast iron is an iron-carbon alloy with a carbon content greater than 2.1%. It is obtained by remelting cast iron (part of steelmaking pig iron) in a furnace, adding ferroalloy, scrap steel, and returned iron to adjust the composition. The difference from pig iron is that cast iron is secondary processing, mostly processed into cast iron. Iron castings have excellent castability and can be made into complex parts, and generally have good machinability. In addition, it has the characteristics of good wear resistance and shock absorption, and low price. [0003] At present, the following measures are often taken to improve the performance of gray cast iron: [0004] (1) Reasonable selection of chemical composition [0005] The carbon content of gray cast iro...

Claims

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Application Information

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IPC IPC(8): C22C33/08C21C1/08
CPCC21C1/08C22C33/08
Inventor 陈明何赛洲
Owner JIANGSU YAFENG ALLOY MATERIAL
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