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A low-cost method for preparing mo2feb2-based cermets

A cermet, mo2feb2 technology, applied in the field of preparation of low-cost Mo2FeB2-based cermets, to achieve the effect of improving mechanical properties, reducing preparation costs, and increasing corrosion resistance

Active Publication Date: 2018-05-08
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to reduce the Mo 2 FeB 2 The preparation cost of base cermet solves the problem that ferromolybdenum powder can only partially replace Mo powder to prepare cermet, and provides a low-cost Mo 2 FeB 2 Preparation method of base cermet

Method used

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  • A low-cost method for preparing mo2feb2-based cermets
  • A low-cost method for preparing mo2feb2-based cermets
  • A low-cost method for preparing mo2feb2-based cermets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] like figure 1 As shown, a low-cost Mo 2 FeB 2 The preparation method of base cermet, it comprises the steps:

[0032] (1) Ingredients: Weigh 62.62g of ferromolybdenum powder, 25.93g of ferroboron powder, 6.78g of carbonyl iron powder, 2.08g of Cr powder, 2.42g of Ni powder, and 0.17g of C powder as reaction raw materials, totaling 100g.

[0033] (2) Mixed ball mill: Put the prepared powder and cemented carbide balls into the ball mill and wet them for 48 hours. The ratio of balls to materials is 5:1. The ball milling medium is absolute ethanol. 1:1, ball mill speed is 250rad / min;

[0034] (3) Drying: put the ball-milled mixture into a drying oven to dry, and keep it warm at 80°C for 2 hours;

[0035] (4) Compression: The dried powder is molded at room temperature to obtain a rectangular compact of 7mm×7mm×30mm, with a pressure of 350MPa;

[0036] (5) Vacuum sintering: The cermet is prepared by vacuum sintering, the sintering temperature is 1200°C, and the holding t...

Embodiment 2

[0040] like figure 1 As shown, a low-cost Mo 2 FeB 2 The preparation method of base cermet, it comprises the steps:

[0041] (1) Ingredients: Weigh 66.3g of ferromolybdenum powder, 25.93g of ferroboron powder, 3.1g of carbonyl iron powder, 2.08g of Cr powder, 2.42g of Ni powder, and 0.17g of C powder as reaction raw materials, totaling 100g.

[0042] (2) Mixed ball mill: Put the prepared powder and cemented carbide balls into the ball mill and wet them for 48 hours. The ratio of balls to materials is 5:1. The ball milling medium is absolute ethanol. 1:1, ball mill speed is 250rad / min;

[0043] (3) Drying: put the ball-milled mixture into a drying oven to dry, and keep it warm at 80°C for 2 hours;

[0044] (4) Compression: The dried powder is molded at room temperature to obtain a rectangular compact of 7mm×7mm×30mm, with a pressure of 350MPa;

[0045] (5) Vacuum sintering: The cermet is prepared by vacuum sintering, the sintering temperature is 1200°C, and the holding tim...

Embodiment 3

[0049] like figure 1 As shown, a low-cost Mo 2 FeB 2 The preparation method of base cermet, it comprises the steps:

[0050] (1) Ingredients: Weigh 66.4g of ferromolybdenum powder, 25.93g of ferroboron powder, 3g of ferrovanadium powder, 0g of carbonyl iron powder, 2.08g of Cr powder, 2.42g of Ni powder, and 0.17g of C powder as reaction raw materials, totaling 100g.

[0051] (2) Mixed ball mill: Put the prepared powder and cemented carbide balls into the ball mill and wet them for 48 hours. The ratio of balls to materials is 5:1. The ball milling medium is absolute ethanol. 1:1, ball mill speed is 250rad / min;

[0052] (3) Drying: put the ball-milled mixture into a drying oven to dry, and keep it warm at 80°C for 2 hours;

[0053] (4) Compression: The dried powder is molded at room temperature to obtain a rectangular compact of 7mm×7mm×30mm, with a pressure of 350MPa;

[0054] (5) Vacuum sintering: The cermet is prepared by vacuum sintering, the sintering temperature is 1...

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Abstract

The invention relates to the field of structure-functional material preparation, in particular to a low-cost Mo2FeB2-based metal ceramic preparation method, and belongs to the field of structure-functional material preparation. According to the method, Mo2FeB2-based metal ceramic is prepared by adopting ferro-molybdenum powder, ferro-boron powder, ferro-vanadium powder, carbonyl iron, Cr, Ni and C as reacting raw materials through an in-situ reactive sintering method. The metal ceramic prepared through the method takes Mo2FeB2 as a ceramic hard phase and takes an iron matrix containing Cr, Ni and C as a metal bonding phase. The method has the advantages that little quantities of ingredients for preparing the metal ceramic are used, and therefore the cost is reduced; Mo is replaced with the ferro-molybdenum powder, therefore, the preparation cost is reduced by 40% to 50%, and the properties of the metal ceramic are equivalent to those of metal ceramic prepared from pure Mo; preparation energy consumption of the metal ceramic is low, the processes are easy to control, and the method is suitable for industrialization needs.

Description

technical field [0001] The invention relates to the field of preparation of structural functional materials, in particular to a low-cost Mo 2 FeB 2 Preparation methods of base metal ceramics. Background technique [0002] Mo 2 FeB 2 The base cermet is prepared by in-situ reaction sintering method, and is based on Mo 2 FeB 2 It is a ceramic hard phase, composed of an iron matrix as a metal binder phase, and has a series of outstanding properties of cermets: (1) Good wear resistance, as a tool and mold in its own wear during work and the wear of the processed material (2) Good high temperature and corrosion resistance, high hardness and bending strength; (3) The coefficient of thermal expansion is similar to that of steel, so when used as a coating on a steel substrate, the bonding strength is high, suitable for Prepare cladding materials for steel substrates; (4) The density is low, only three-fifths of cemented carbide. [0003] Although Mo 2 FeB 2 The base cermet h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C29/14
CPCC22C1/051C22C1/058C22C29/14
Inventor 余海洲李阳赵迪孙彩红郑勇
Owner CHINA THREE GORGES UNIV
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