Tungsten carbide particle-enhanced iron-based powder metallurgy material and preparation method thereof

A technology of iron-based powder metallurgy and tungsten carbide particles. It is applied in the field of plastic forming technology and powder metallurgy. It can solve the problems of easy decarburization and weaken the strengthening effect of WC particles, so as to reduce the amount of addition, have a good prospect for industrial production, and improve the strength. Effect

Inactive Publication Date: 2011-05-25
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although relevant studies have shown that adding high-rigidity and high-strength particle reinforcements to the iron matrix can improve its comprehensive mechanical properties, due to the high-energy ball milling of WC and iron-containing powders, WC is easy to decarburize and easy to It forms a solid solution with iron, thereby weakening the strengthening effect of WC particles, so far there has been no report on WC particles reinforcing Fe-Cu-Ni-Mo-C powder metallurgy materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A preparation method of iron-based powder metallurgy material reinforced by tungsten carbide particles comprises the following steps:

[0035] Step 1: Composition design of matrix material

[0036] The powders of iron, copper, nickel, molybdenum and carbon are used as base materials, and the proportions are made according to the following mass percentages:

[0037] 94.4% iron, 2.0% copper, 1.7% nickel, 1.2% molybdenum, 0.7% carbon, and the rest are unavoidable trace impurities;

[0038] Iron, copper, nickel, molybdenum and carbon are all added in the form of simple substances, of which iron is water atomized iron powder with a purity of ≥99.5% and a particle size of 45-149 μm; copper is electrolytic copper powder with a purity of ≥99.9% and a particle size of ≤75 μm; Nickel is nickel carbonyl powder, purity ≥ 99.8%, particle size 3-5 μm; molybdenum is reduced molybdenum powder, purity ≥ 99.7%, particle size ≤ 75 μm; carbon is colloidal graphite, particle size 2-3 μm. ...

Embodiment 2

[0051] A preparation method of iron-based powder metallurgy material reinforced by tungsten carbide particles comprises the following steps:

[0052] Step 1: Composition design of matrix material

[0053] The powders of iron, copper, nickel, molybdenum and carbon are used as base materials, and the proportions are made according to the following mass percentages:

[0054] 94.3% iron, 1.8% copper, 1.7% nickel, 1.2% molybdenum, 1.0% carbon, and the rest are unavoidable trace impurities;

[0055] Iron, copper, nickel, molybdenum and carbon are all added in elemental form. Among them, iron is water atomized iron powder with a purity of ≥99.5% and a particle size of 45-149 μm; copper is electrolytic copper powder with a purity of ≥99.9% and a particle size of ≤75 μm; nickel is carbonyl nickel powder with a purity of ≥99.8% and a particle size of 3-5 μm Molybdenum is reduced molybdenum powder, purity ≥ 99.7%, particle size ≤ 75 μm; carbon is colloidal graphite, particle size 2-3 μ...

Embodiment 3

[0068] A preparation method of iron-based powder metallurgy material reinforced by tungsten carbide particles comprises the following steps:

[0069] Step 1: Composition design of matrix material

[0070] The powder of iron, copper, nickel, molybdenum and carbon is used as the matrix, and the proportion is carried out according to the following mass percentages:

[0071] 94.6% iron, 1.4% copper, 2.0% nickel, 1.0% molybdenum, 1.0% carbon, and the rest are unavoidable trace impurities;

[0072] Iron, copper, nickel, molybdenum and carbon are all added in elemental form. Among them, iron is water atomized iron powder with a purity of ≥99.5% and a particle size of 45-149 μm; copper is electrolytic copper powder with a purity of ≥99.9% and a particle size of ≤75 μm; nickel is carbonyl nickel powder with a purity of ≥99.8% and a particle size of 3-5 μm Molybdenum is reduced molybdenum powder, purity ≥ 99.7%, particle size ≤ 75 μm; carbon is colloidal graphite, particle size 2-3 μm...

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Abstract

The invention relates to plastic forming technology and powder metallurgy technology, in particular to a tungsten carbide particle-enhanced iron-based powder metallurgy material and a preparation method thereof. According to a specific formula, the iron-based powder metallurgy material comprises the following components in percentage by mass: 85.0 to 90.0 percent of matrix material and 10.0 to 15.0 percent of enhanced phase tungsten carbide, wherein the matrix material comprises the following components in percentage by mass: 1.4 to 2.0 percent of copper, 1.7 to 2.0 percent of nickel, 0.9 to 1.2 percent of molybdenum, 0.7 to 1.6 percent of carbon and the balance of iron. In the invention, quick spark plasma sintering is adopted; and the obtained material has the characteristics of nearly full densification, high hardness, high indoor temperature bending strength, high high-temperature mechanical property and the like, can be used as a wear-resistant material, a tool material and the like, and can reduce the dependency of Chinese tool material production on import of precious metals such as vanadium, chromium and the like. The material has high cost performance and a good industrial production prospect.

Description

technical field [0001] The invention relates to plastic forming technology and powder metallurgy technology, in particular to an iron-based powder metallurgy material reinforced by tungsten carbide (WC) particles and a preparation method thereof. Background technique [0002] Iron-based materials have been widely used because of their cheap price, abundant resources, superior performance and easy realization of large-scale production. However, with the development of modern industry and science and technology, higher requirements are put forward for their comprehensive mechanical properties. An existing Fe-Cu-Ni-Mo-C powder metallurgy material belongs to high-strength heat-treated steel, which is mainly composed of matrix iron and alloying elements. However, its friction and wear resistance is relatively low, it is easy to deform at high temperatures, and the heat treatment process is complicated. , which limits the application of this kind of material to some extent. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/16C22C33/02C22C32/00
Inventor 李小强赖燕根陈志成李元元叶永权
Owner SOUTH CHINA UNIV OF TECH
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