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Method for enabling nano molten iron purifying modifier to be used in austenite ductile cast iron wear-resistant casting

A modification agent, austeric technology, applied in the field of ausferitic ductile iron wear-resistant castings, nanometer molten iron purification modification agent, can solve the problems of difficulty in adding nanoparticles, restricting the application of nanomaterials, etc., to reduce inclusions and improve mechanical properties Performance, the effect of reducing slag inclusion

Active Publication Date: 2015-08-26
NINGGUO HUAFENG WEAR RESISTANT MATERIAL
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Due to the unique properties of nanomaterials, how to add nanoparticles to steel liquid has always been a very difficult issue, which also restricts the application of nanomaterials

Method used

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  • Method for enabling nano molten iron purifying modifier to be used in austenite ductile cast iron wear-resistant casting

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Embodiment 1

[0025] The method of using nanometer molten iron purification and modification agent in ausferitic ductile iron wear-resistant castings, adding nanometer molten iron purification modification agent is: after the conventional deoxidation of molten steel, a certain amount of nanometer molten iron purification agent is added to the ladle for strengthening Deoxidation and desulfurization, further degassing at the same time, fully stirred by the impact force of molten iron when tapping, so that the molten steel is greatly purified, including the following steps:

[0026] Step 1, smelting molten iron;

[0027] Step 2, spheroidizing treatment: the spheroidizing agent is placed on the bottom of the ladle by the flushing method, and the bottom of the ladle is used as a dam so that the molten iron can convect. Clean the processed molten iron slag and add covering agent, add 1.2kg covering agent for every 100kg molten iron;

[0028] The third step, pouring: the pouring temperature of mo...

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Abstract

The invention relates to a method for enabling a nano molten iron purifying modifier to be used in an austenite ductile cast iron wear-resistant casting. The method for adding the nano molten iron purifying modifier comprises the following steps: adding a certain quantity of nano molten iron purifying agent into a steel ladle to perform enhanced deoxidation and desulphurization after conventional deoxidation of molten iron, performing further degasification at the same time and fully stirring by utilizing the impact strength of the molten iron during tapping, so that the molten iron is greatly purified. The nano molten iron purifying modifier has the effect of refining grains, can improve both the strength and the plasticity of materials and can also obviously improve the mechanical property of the materials at the same time. According to the method, the strength, the hardness and the toughness of the austenite nodular iron wear-resistant casting can be obviously improved.

Description

technical field [0001] The invention relates to the field of casting, in particular to a method for using a nanometer molten iron purifying modificator in an ausferitic nodular iron wear-resistant casting. Background technique [0002] Modifiers are widely used in the metallurgical industry. Modification treatment is a common and effective means to improve the microstructure of alloys and improve the mechanical properties of alloys, especially in refining the microstructure of alloys, thereby improving the strength, hardness, elongation, impact toughness and thermal stability of alloys. Sexuality and other aspects have an important role and significance. Commonly used modifiers are divided into two categories: alloy modifiers and compound modifiers. The modifying elements in the alloy modifying agent exist in the form of simple substances and (or) intermetallic compounds. After being added to the metal melt, they melt and diffuse into the melt to play a role in modifying. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/06C21C7/064C21C1/02C21C1/10C22C33/08
Inventor 陈全心姚永茂吴明忠周峰
Owner NINGGUO HUAFENG WEAR RESISTANT MATERIAL
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