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Multifunctional composite modificator for cast steel

A modifier and multifunctional technology, applied in the field of multifunctional composite modifiers, can solve the problems of high content of sulfur and phosphorus, low toughness and wear resistance, coarse grains, etc. The effect of reducing cavities

Inactive Publication Date: 2019-01-11
JIKAI HEBEI MECHATRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a multifunctional compound modifier suitable for cast steel, which can solve the problems of coarse grains, high content of sulfur and phosphorus, low toughness and wear resistance in the production process of cast steel, and make the material Improved performance and improved material utilization

Method used

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  • Multifunctional composite modificator for cast steel
  • Multifunctional composite modificator for cast steel
  • Multifunctional composite modificator for cast steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A multifunctional compound modifier suitable for cast steel, comprising the following components in mass percentage:

[0045] Si 3 N 4 : 20%, AlN: 18%, Fe-SiRE: 7%, Al: 16%, Mg: 6%, Nb: 8%, V: 8%, CaO: 17%.

[0046] When in use, the molten steel is operated according to the normal smelting process, the modifier is added into the ladle, and the impact force of the molten steel is used to stir it evenly.

Embodiment 2

[0048] A multifunctional compound modifier suitable for cast steel, comprising the following components in mass percentage:

[0049] Si 3 N 4 : 22%, AlN: 16%, Fe-SiRE: 8%, Al: 17%, Mg: 7%, Nb: 7%, V: 9%, CaO: 16%.

[0050] When in use, the molten steel is operated according to the normal smelting process, the modifier is added into the ladle, and the impact force of the molten steel is used to stir it evenly.

Embodiment 3

[0052] A multifunctional compound modifier suitable for cast steel, comprising the following components in mass percentage:

[0053] Si 3 N 4 : 23%, AlN: 16%, Fe-SiRE: 6%, Al: 18%, Mg: 5%, Nb: 7%, V: 10%, CaO: 15%.

[0054] The desulfurization reaction is as follows:

[0055]

[0056]

[0057] [S]+[C]+(CaO)=(CaS)+{CO}

[0058] The reaction of desulfurization phosphorus oxygen is as follows:

[0059] [P]+5[O]+4(CaO)=(4CaO·P 2 o 5 )

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Abstract

The invention discloses a multifunctional composite modificator for cast steel. The modificator is prepared from the following components in percentage by mass: 17-23 percent of Si3N4, 15-25 percent of AlN, 5-9 percent of Fe-SiRE, 14-18 percent of Al, 5-7 percent of Mg, 6-10 percent of Nb, 6-10 percent of V and 14-20 percent of CaO. The multifunctional composite modificator can solve the problemsof thick crystal grain, high content of phosphor, low toughness and low abrasion resistance in the cast steel producing process, so that the material performance is improved, and the material utilization can be improved.

Description

technical field [0001] The invention relates to a multifunctional composite modifier suitable for cast steel. Background technique [0002] Modification treatment is to add some special fine nucleation-promoting substances to the molten metal at a certain stage of casting, so that it forms many dispersed artificial non-spontaneous crystal nuclei in the molten metal, thereby obtaining fine casting grains, making The performance of the material is improved. [0003] Although the currently better modifiers also use nano-scale particles, their composite properties are poor, and a single type of modifier cannot solve the problem of high sulfur, phosphorus, and oxygen content in molten steel while improving performance. The mixed addition of different types of modificators may also react with each other, resulting in unpredictable vicious consequences. [0004] At present, sodium salt modifiers and pure metal or iron alloy modifiers such as aluminum and ferro-titanium are mostly...

Claims

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Application Information

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IPC IPC(8): C21C7/064C21C7/076C21C7/00
CPCC21C7/0006C21C7/064C21C7/076Y02P10/20
Inventor 苏怡宁赵辉杜宁刘龙飞周志彪张晓杰白伟杰
Owner JIKAI HEBEI MECHATRONICS TECH CO LTD
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