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Preparation method of in-situ synthesis ZTA particle reinforced steel-based configuration composite material

A particle-enhanced, in-situ self-generating technology, applied in the field of metal matrix composite materials, can solve the problems of poor wettability between ZTA ceramic particles and steel melt, easy peeling of the composite area of ​​the surface composite material, and low interfacial bonding strength. The effect of high interface bonding strength, not easy to peel off, and good compatibility

Active Publication Date: 2021-12-31
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems of poor wettability between ZTA ceramic particles and steel melt, low interfacial bonding strength, easy peeling of the whole layer in the composite area of ​​the surface composite material during use, and insufficient wear resistance, the purpose of the present invention is to provide an in-situ self-generated ZTA A method for preparing a particle-reinforced iron-based composite material, the composite material is a honeycomb macroscopic heterogeneous composite material, specifically comprising the following steps:

Method used

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  • Preparation method of in-situ synthesis ZTA particle reinforced steel-based configuration composite material
  • Preparation method of in-situ synthesis ZTA particle reinforced steel-based configuration composite material
  • Preparation method of in-situ synthesis ZTA particle reinforced steel-based configuration composite material

Examples

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Embodiment 1

[0025] This example relates to a method for preparing a high-chromium cast iron-based honeycomb macro-heterogeneous composite material reinforced by in-situ self-generated ZTA ceramic particles. The specific steps are as follows:

[0026] (1) Dissolve aluminum nitrate nonahydrate and zirconium oxynitrate hydrate in deionized water, then drop in citric acid to obtain a mixed solution, wherein the molar ratio of aluminum nitrate nonahydrate, zirconium oxynitrate hydrate, and citric acid is 1: 0.1:0.1.

[0027] (2) Use nitric acid and ammonia water to adjust the pH value of the mixed solution to 2, add 1.0% (mol fraction) ethylene glycol as a dispersant to the mixed solution, stir well, put it in a constant temperature water bath and heat it for 8 hours to obtain a certain viscosity transparent sol.

[0028] (3) Add high-chromium cast iron powder with a particle size of 50 μm to the sol, the molar ratio of high-chromium cast iron powder to transparent sol is 0.5:1, stir rapidly ...

Embodiment 2

[0032] This embodiment relates to a method for preparing a high-manganese steel-based honeycomb macro-heterogeneous composite material reinforced by in-situ self-generated ZTA ceramic particles. The specific steps are as follows:

[0033] (1) Dissolve aluminum nitrate nonahydrate and zirconium oxynitrate hydrate in deionized water, then drop in citric acid to obtain a mixed solution, wherein the molar ratio of aluminum nitrate nonahydrate, zirconium oxynitrate hydrate, and citric acid is 1: 0.2:0.15.

[0034] (2) Use nitric acid and ammonia water to adjust the pH value of the mixed solution to 1, add 0.5% (mol fraction) ethylene glycol as a dispersant to the mixed solution, stir well, put it in a constant temperature water bath and heat it for 6 hours to obtain a certain viscosity transparent sol.

[0035] (3) Add high manganese steel powder with a particle size of 20 μm to the sol, the molar ratio of high manganese steel powder to transparent sol is 0.3:1, stir rapidly for 0...

Embodiment 3

[0039] This embodiment relates to a method for preparing an alloy steel-based honeycomb-shaped macroscopic heterogeneous composite material reinforced by in-situ self-generated ZTA ceramic particles. The specific steps are as follows:

[0040] (1) Dissolve aluminum nitrate nonahydrate and zirconium oxynitrate hydrate in deionized water, then drop in citric acid to obtain a mixed solution, wherein the molar ratio of aluminum nitrate nonahydrate, zirconium oxynitrate hydrate, and citric acid is 1: 0.3:0.2.

[0041] (2) Use nitric acid and ammonia water to adjust the pH value of the mixed solution to 3, add 2.0% (mol fraction) of ethylene glycol as a dispersant to the mixed solution, stir well, put it in a constant temperature water bath and heat it for 10 hours to obtain a certain viscosity transparent sol.

[0042] (3) Add alloy steel powder with a particle size of 100 μm to the sol, the molar ratio of alloy steel powder to transparent sol is 0.6:1, stir rapidly for 0.4h until...

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Abstract

The invention discloses a preparation method of an in-situ synthesis ZTA particle reinforced steel-based configuration composite material, and belongs to the technical field of metal-based composite materials. The preparation method comprises the steps of preparing transparent sol by taking aluminum nitrate nonahydrate, zirconyl nitrate hydrate and the like as raw materials; adding steel-based powder into the sol for liquid-solid doping, stirring until solidification, and sequentially carrying out vacuum drying and reduction on ZTA / steel-iron mixed powder; and filling the honeycomb walls of a honeycomb-shaped mold with the ZTA / steel mixed powder, filling honeycomb holes of the honeycomb-shaped mold with the steel-based powder, and obtaining the in-situ synthesis ZTA ceramic particle reinforced steel-based honeycomb structure composite material after pressing and sintering. ZTA ceramic is generated in situ, the surfaces of ceramic particles are free of pollution, the compatibility with a steel matrix is good, and the interface bonding strength is high; and the honeycomb walls are composed of the composite areas with high hardness, the abrasion effect borne by the honeycomb holes with low hardness can be remarkably reduced, the abrasion resistance is improved by more than three times compared with a traditional steel material, and wide application prospects are achieved.

Description

technical field [0001] The invention relates to a method for preparing an in-situ self-generated ZTA particle-reinforced iron-based composite material, and belongs to the technical field of metal-based composite materials. Background technique [0002] Ceramic particle reinforced steel matrix composites have become the focus of domestic and foreign scientific research and industrialization because of their combination of high hardness, high wear resistance of ceramic materials and high strength, good plasticity and toughness of metals. Zirconia-toughened alumina (ZTA) ceramic particles have the advantages of good toughness, high wear resistance and low composition. The steel matrix composites prepared by using them have excellent wear properties, and are currently a research hotspot in the field of wear-resistant materials. [0003] However, the wetting angle between ZTA ceramic particles and iron is 130-140°, basically no wetting. Domestic and foreign research on non-wetti...

Claims

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Application Information

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IPC IPC(8): C22C33/02B22F3/11B22F9/22
CPCC22C33/0235B22F3/1115B22F9/22
Inventor 隋育栋蒋业华侯占东周谟金李祖来温放放
Owner KUNMING UNIV OF SCI & TECH
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