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Modified spheroidizing agent and preparation method thereof

A spheroidizing agent and modification technology, applied in the field of material chemistry, can solve the problems of reducing the comprehensive mechanical properties of CADI of finished products, affecting the application of CADI large-diameter casting balls, and slow cooling speed of the casting core, so as to solve the problem of core spheroidization decline , improve the mechanical properties of the heart, and improve the effect of mechanical properties

Inactive Publication Date: 2018-06-15
HEFEI KAIER NANOMETER ENERGY & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for large-section ball mill castings with a thickness greater than 100mm, during the casting process, due to the slow cooling rate of the core of the casting and the long crystallization time, there will often be spheroidization recession and graphite spheroid growth due to poor spheroidization. , the reduction of the number of graphite balls, etc., reduces the comprehensive mechanical properties of the finished CADI, especially the impact toughness, and is prone to brittle fracture, which seriously affects the application of CADI large-diameter casting balls

Method used

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  • Modified spheroidizing agent and preparation method thereof
  • Modified spheroidizing agent and preparation method thereof
  • Modified spheroidizing agent and preparation method thereof

Examples

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Effect test

Embodiment 1

[0025] Embodiment 1: the preparation of modified spheroidizing agent

[0026] (1) Take by weighing 8 kg of nodulizing agent whose brand name is HL-Mg5RE, and mix the nodulizing agent and 1.4 kg of micron silicon carbide in a SYH type three-dimensional mixer for 3-5 hours at normal temperature to obtain a mixture A;

[0027] (2) At normal temperature, add 600g of nano-silicon carbide to the mixture A, start the three-dimensional mixer and mix for 3-5 hours to obtain the mixture B;

[0028] (3) Use a GHL type high-efficiency wet mixing granulator to granulate the mixture B, with a granulation diameter of 3-25mm, to obtain a modified nodularizer.

Embodiment 2

[0029] Embodiment 2: the preparation of modified spheroidizing agent

[0030] The method is the same as in Example 1, except that the grade of the spheroidizing agent in step (1) is HL-Mg5RE2; the amount of raw materials is: 8 kg of spheroidizing agent, 1.4 kg of micron silicon carbide, and 0.6 kg of nano silicon carbide.

Embodiment 3

[0031] Embodiment 3: the preparation of modified spheroidizing agent

[0032] The method is the same as in Example 1, except that the grade of the spheroidizing agent in step (1) is HL-Mg6RE; the amount of raw materials is: 8 kg of spheroidizing agent, 1.4 kg of micron silicon carbide, and 0.6 kg of nano silicon carbide.

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Abstract

The invention belongs to the technical field of material chemistry and particularly relates to a modified spheroidizing agent and a preparation method thereof. The modified spheroidizing agent comprises the following raw materials in mass fraction: 60-90wt% of a spheroidizing agent, 10-20wt% of micro silicon carbide and 2-10wt% of nano silicon carbide. The modified spheroidizing agent provided bythe invention can increase nucleation number of CADI, and optimizes a spheroidizing process.

Description

technical field [0001] The invention belongs to the technical field of material chemistry, and in particular relates to a modified spheroidizer and a preparation method thereof. Background technique [0002] In cement, mining, thermal power generation and other industrial fields, commonly used crushing equipment requires the use of chromium-based wear-resistant materials with high wear resistance. In recent years, due to the reduction of strategic resources, the price of raw materials related to high-carbon ferrochrome has been rising all the way, which has increased the production cost of manufacturing enterprises. In order to help enterprises reduce costs and improve efficiency, the research and development of non-chromium or low-chromium wear-resistant materials is imperative. Carbide-containing austempering ductile iron (abbreviated as CADI) is a new type of ductile iron material derived from austempering ductile iron (abbreviated as ADI). Its metallographic microstruct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C1/10
CPCC21C1/105
Inventor 张芬红黄勇桂劲松徐伟
Owner HEFEI KAIER NANOMETER ENERGY & TECH
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