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a kind of al 2 o 3 Preparation method of particle reinforced iron-based composite material

An iron-based composite material and particle-reinforced technology, applied in the field of composite materials, can solve the problems of poor wettability, poor interface wettability, complex preparation process, etc., and achieve the effect of increasing uniformity

Inactive Publication Date: 2019-07-26
唐山玉利科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But the steel material and Al 2 o 3 The density difference of granular materials is large, and the wettability of the interface is poor. Generally, powder metallurgy methods or other special process measures are required to overcome the problems of large density difference and wettability difference between the two, which affect the performance of iron-based composite materials.
At the same time, the preparation process using additional particles is complicated and the cost is high, which is not conducive to popularization and application

Method used

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  • a kind of al <sub>2</sub> o <sub>3</sub> Preparation method of particle reinforced iron-based composite material

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Effect test

Embodiment 1

[0032] Mix anhydrous aluminum chloride solution with a molar ratio of 5:1 and aluminum micropowder, heat at 200°C for 2-3 hours, after the reaction is complete, filter to obtain polyaluminum chloride; disperse the polyaluminum chloride in 0.5mol / L ethanol solution, slowly add ammonia solution, the obtained white precipitate is filtered, washed, and dried to obtain a mixture of homemade aluminum hydroxide and aluminum micropowder. Add the self-made mixture of aluminum hydroxide and aluminum micropowder to the Fe powder in a certain proportion, and add a certain amount of C powder, mix well and then briquette, and prepare Al by high-temperature sintering through the following steps 2 o 3 Particle-reinforced iron-based composite material: heat up to 350°C at a heating rate of 20°C / min, and hold for 0.5h; then raise the temperature to 550°C at a heating rate of 20°C / min, and hold for 0.5h; ℃; then raise the temperature to 1250°C at a heating rate of 20°C / min, and keep it for 3 h...

Embodiment 2

[0034] Mix anhydrous aluminum chloride solution and aluminum micropowder with a molar ratio of 6:1 to obtain a self-made mixture of aluminum hydroxide and aluminum micropowder, and mix it with C powder and Fe powder to obtain a mixture of 10% Al 2 o 3 , 3%C and the composite material that Fe forms, all the other are with embodiment 1.

Embodiment 3

[0036] Mix anhydrous aluminum chloride solution and aluminum micropowder with a molar ratio of 6:1 to obtain a self-made mixture of aluminum hydroxide and aluminum micropowder, and mix it with C powder and Fe powder to obtain 11% Al 2 o 3 , 4%C and the composite material that Fe forms, all the other are with embodiment 1.

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Abstract

The invention discloses a preparation method of an Al2O3 particle-reinforced iron-based composite. The preparation method comprises the following steps: (1) an anhydrous aluminum chloride solution with the mole ratio being (5-9):1 and aluminum micro powder are mixed and heated at 200 DEG C for 2-3h, and after complete reaction, filtration is carried out and thus poly aluminum chloride is obtained; (2) poly aluminum chloride is dispersed in a 0.5mol / L alcohol solution, an aqueous solution of ammonia is slowly added and thus white precipitates are obtained, filtration, washing and drying are carried out, and thus a mixture of aluminum hydroxide and aluminum micro powder is obtained; and (3) the mixture of aluminum hydroxide and the aluminum micro powder is mixed with C powder and Fe powder, compression moulding is carried out, high-temperature sintering is carried out in an argon shielding furnace and thus the Al2O3 particle-reinforced iron-based composite is obtained. The problems that the density difference between an iron-based material and an Al2O3 particle material is big, and the interface is poor are solved. The prepared Al2O3 particle-reinforced iron-based composite has good mechanical properties, and can be widely applied to complicated-shape parts having requirements on high strength and high hardness.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to an Al 2 o 3 A method for preparing particle-reinforced iron-based composite materials. Background technique [0002] Iron and steel materials are the most commonly used metal materials, with excellent mechanical properties, and various alloying elements (such as nickel, copper, chromium, manganese, tungsten, molybdenum, etc.) can be added to improve their properties, and can be easily heat treated To change its organization and improve its mechanical properties in order to adapt to the requirements of different working conditions. One of the key research areas in recent years is to add various wear-resistant particles to steel materials to improve their specific strength, specific stiffness and wear resistance. [0003] al 2 o 3 It has high hardness, high wear resistance, and good chemical stability. It can still maintain good performance even under high temperat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/02
CPCC22C33/02
Inventor 张斌
Owner 唐山玉利科技有限公司