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Preparation method of low-magnesium nodulizer

A low-magnesium nodularizing agent and technology of nodularizing agent, applied in the field of nodular cast iron, can solve the problems of increased amount of nodularizing agent, poor nodularizing treatment and high MgO content, improve the performance of nodular iron and reduce black slag defects , The effect of strong desulfurization and deoxidation ability

Inactive Publication Date: 2020-04-17
陈红喜
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The technical problem to be solved by the present invention: Aiming at the problem that the nodulizer contains a large amount of Mg, resulting in high MgO content, too severe reaction, poor nodulizer treatment, and increased addition of nodulizer, a low-magnesium sphere is provided. Chemical preparation method

Method used

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  • Preparation method of low-magnesium nodulizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In parts by weight, weigh 40 parts of pure silicon powder, 8 parts of barium powder, 4 parts of zirconium powder, and 60 parts of iron powder, and place the pure silicon powder, barium powder, zirconium powder, and iron powder in a high-speed mixer, and Stir and mix at 1200r / min for 20min to obtain the inoculant germ powder, place the inoculant germ powder in a multifunctional melting furnace, raise the temperature from normal temperature to 1700 °C at a heating rate of 50 °C / min, and keep it for 1-2 hours to obtain Inoculant molten liquid, pour the inoculant molten liquid into a mold with a specification of 200mm×80mm×80mm while it is hot, place it in cold water to quench, take it out, and obtain the ferrosilicon alloy inoculant; and weigh them separately according to the number of parts by weight 80 parts of pure silicon powder, 8 parts of magnesium powder, 8 parts of yttrium powder, 16 parts of cerium powder, 4 parts of calcium powder, 80 parts of iron powder, 400 par...

Embodiment 2

[0039] In parts by weight, weigh 45 parts of pure silicon powder, 9 parts of barium powder, 4.5 parts of zirconium powder, and 70 parts of iron powder, and place the pure silicon powder, barium powder, zirconium powder, and iron powder in a high-speed mixer, and Stir and mix at a speed of 1400r / min for 25min to obtain the inoculant germ powder, place the inoculant germ powder in a multifunctional melting furnace, raise the temperature from normal temperature to 1750 °C at a heating rate of 50 °C / min, and keep it for 1.5 hours to obtain the inoculant Inoculant melt, pour the inoculant melt while hot into a mold with a specification of 200mm×80mm×80mm, place it in cold water to quench, take it out, and obtain the ferrosilicon alloy inoculant; then weigh 90 1 part of pure silicon powder, 9 parts of magnesium powder, 9 parts of yttrium powder, 18 parts of cerium powder, 4.5 parts of calcium powder, 90 parts of iron powder, 450 parts of absolute ethanol, pure silicon powder, magnesi...

Embodiment 3

[0041] In terms of parts by weight, weigh 50 parts of pure silicon powder, 10 parts of barium powder, 5 parts of zirconium powder, and 80 parts of iron powder, and place the pure silicon powder, barium powder, zirconium powder, and iron powder in a high-speed mixer, and Stir and mix at a speed of 1600r / min for 30min to obtain the inoculant germ powder, place the inoculant germ powder in a multifunctional melting furnace, raise the temperature from normal temperature to 1800 °C at a heating rate of 50 °C / min, and keep it for 2 hours to obtain the inoculant Molten liquid, pour the inoculant molten liquid into a mold with a specification of 200mm×80mm×80mm while it is hot, place it in cold water to quench, take it out, and obtain the ferrosilicon alloy inoculant; then weigh 100 parts by weight Pure silicon powder, 10 parts of magnesium powder, 10 parts of yttrium powder, 20 parts of cerium powder, 5 parts of calcium powder, 100 parts of iron powder, 500 parts of absolute ethanol, ...

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Abstract

The invention relates to a preparation method of a low-magnesium nodulizer, and the preparation method belongs to the technical field of nodular cast iron. The preparation method takes magnesium powder, yttrium powder, cerium powder and calcium powder as raw materials, and prepares the low-magnesium nodulizer; the magnesium is a basic graphite spheroidizing element, the chemical property of magnesium is active, the desulfurization and deoxygenation capacity is high, the generated sulfide and oxide are high in melting points, low in density and prone to float out of molten iron to be removed, the spheroidizing capacity of rare earth elements such as yttrium and cerium is high, the added rare earth elements such as yttrium and cerium can play a good auxiliary spheroidizing role, the added yttrium and cerium elements can reduce the adding amount of magnesium and possible black slag defects, and a stable spheroidizing effect can be achieved even if the sulfur content of molten base iron ishigh; and by adding calcium into the molten iron, the effects of deoxidizing, desulfurizing and improving the surface tension of the molten iron can be achieved, the adding amount of main spheroidizing elements can be reduced, and the spheroidizing effect is enhanced.

Description

technical field [0001] The invention relates to a preparation method of a low-magnesium nodularizer, belonging to the technical field of nodular cast iron. Background technique [0002] As an important metal material, cast iron is widely used in industrial production and has become an important basis for machinery manufacturing. Ductile iron was invented in 1947, which greatly improved the original comprehensive performance of cast iron. Its strength, plasticity and ductility are similar to steel, and it can be better used for complex stress, strength, toughness and wear resistance requirements. Taller cast parts. Ductile iron quickly became a widely used metallic material. [0003] With the development of industrial technology, in addition to meeting the requirements of normal temperature environment, nodular cast iron also needs to meet the requirements of good mechanical properties and low temperature impact resistance in low temperature environment, so as to avoid brit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C1/10
CPCC21C1/105
Inventor 陈红喜
Owner 陈红喜
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