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Ceramic steel composite material and its preparation method

A composite material and ceramic technology, applied in the field of ceramic steel composite material and its preparation, can solve the problems of low proportion of reinforcing particles, complicated preparation process, influence on material properties, etc., and achieves reduction of preparation cost, great application prospect, and easy process. Effect

Inactive Publication Date: 2015-03-11
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method of the added particle reinforced metal matrix composite is to add foreign particle components to the metal matrix material. The problems in this method are: the binding force between the added particle and the matrix interface in the added particle reinforced composite material is reduced, and the added There will be defects such as pores and cracks around the particles, which will affect the performance of the material; the proportion of reinforced particles in the composite material is not high, which makes the hardness and wear resistance of the material unable to reach a high level; at the same time, additional particle reinforcement The thermodynamic stability of the composite material is poor and its preparation process is also complicated
However, the flexibility of the composite process is poor, the shape of the ceramic body cannot be controlled, sharp corners and holes are prone to appear in the composite structure, and only the ceramic reinforcement phase of alumina nanoscale can be obtained, which cannot fully exert the performance of the material.

Method used

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  • Ceramic steel composite material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A ceramic steel composite material and a preparation method thereof. The composition and content of the ceramic steel composite material are: B is 1~4wt%, Mo is 20~35wt%, Ni is 7~10wt%, Mn is 2~5wt%, Cr is 8~15wt%, C is 0.8~2wt%, the balance is Fe.

[0026] The preparation method of the ceramic steel composite material is:

[0027] Step 1: Dosing according to the composition and content of the ceramic-steel composite material, and adding a forming agent of 2-4 wt% of the total composition of the ceramic-steel composite material to obtain a mixture.

[0028] Step 2: Put the mixture into a ball mill for wet grinding for 20-80 hours, then vacuum-dry it at 50-80°C for 5-8 hours, and sieve to obtain a powder with a particle size of 48-150 μm, and then grind the powder Press molding to obtain a molded green body.

[0029] Step 3: Put the molded green body into the sintering furnace, first raise the temperature from room temperature to 320~400°C at a rate of 5~10°C / min, kee...

Embodiment 2

[0035] A ceramic steel composite material and a preparation method thereof. The composition and content of the ceramic steel composite material are: B is 3~6wt%, Mo is 30~45wt%, Ni is 4~6wt%, Mn is 2~5wt%, Cr is 5~9wt%, C is 0.8~2wt%, the balance is Fe.

[0036] The preparation method of the ceramic steel composite material is:

[0037] Step 1: Dosing according to the composition and content of the ceramic-steel composite material, and adding a forming agent of 2-4 wt% of the total composition of the ceramic-steel composite material to obtain a mixture.

[0038] Step 2: Put the mixture into a ball mill for wet grinding for 20-80 hours, then vacuum-dry it at 50-80°C for 5-8 hours, and sieve to obtain a powder with a particle size of 48-150 μm, and then grind the powder Press molding to obtain a molded green body.

[0039] Step 3: Put the molded green body into the sintering furnace, first raise the temperature from room temperature to 320~400°C at a rate of 5~10°C / min, keep ...

Embodiment 3

[0045] A ceramic steel composite material and a preparation method thereof. The composition and content of the ceramic steel composite material are: B is 5~8wt%, Mo is 40~55wt%, Ni is 3~5wt%, Mn is 0.1~3wt%, Cr is 3~7wt%, C is 0.2~1.5wt%, the balance is Fe.

[0046] The preparation method of the ceramic steel composite material is:

[0047] Step 1: Dosing according to the composition and content of the ceramic-steel composite material, and adding a forming agent of 3-6 wt% of the total composition of the ceramic-steel composite material to obtain a mixture.

[0048] Step 2: put the mixture into a ball mill for wet grinding for 50-100 hours, then vacuum-dry it at 50-80°C for 5-8 hours, and sieve to obtain a powder with a particle size of 75-200 μm, and then grind the powder Press molding to obtain a molded green body.

[0049] Step 3: Put the molded green body into the sintering furnace, first raise the temperature from room temperature to 400~500°C at a rate of 3~8°C / min, kee...

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Abstract

The invention discloses a ceramic steel composite material and its preparation method. The ceramic steel composite material comprises 1-10wt% of B, 20-65wt% of Mo, 1-10wt% of Ni, 0.1-5wt% of Mn, 1-15wt% of Cr, 0.2-2wt% of C, and the balance of Fe. The preparation method comprises the following steps: burdening according to the above components and contents thereof, adding a forming agent accounting for 2-6wt% of the total amount of the components, placing the obtained mixture in a ball mill, carrying out wet milling for 20-100h, carrying out vacuum drying at 50-80DEG C for 5-8h, screening, and carrying out compression forming on the screened powder; placing the formed blank in a sintering furnace, sequentially heating to 320-500DEG C, 750-850DEG C and 900-1000DEG C according to a rate of 3-10DEG C / min, and respectively carrying out heat insulation for 30-60min; and heating to 1100-1400DEG C according to a rate of 2-6DEG C / min, and carrying out heat insulation for 30-90min to obtain the ceramic steel composite material. The preparation method has the advantages of low cost and simple process, and the prepared ceramic steel composite material has the advantages of high hardness, excellent acid and alkali resistance, and good wear resistance.

Description

technical field [0001] The invention belongs to the field of metal-ceramic composite materials. Specifically relates to a ceramic steel composite material and a preparation method thereof. Background technique [0002] Metal matrix composites are a high-tech new engineering material that has developed rapidly in recent years. It has high specific stiffness, specific strength, excellent high temperature performance, low thermal expansion coefficient, good wear resistance and friction reduction, and It has attracted more and more attention due to its excellent processing performance, formability and obvious cost-effective advantages. As a kind of metal matrix composite material, ceramic steel composite material not only has the characteristics of high hardness, acid and alkali corrosion resistance and wear resistance of ceramic materials, but also has the characteristics of plasticity and toughness of steel materials. [0003] The preparation methods of metal matrix composit...

Claims

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Application Information

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IPC IPC(8): C22C38/58C22C38/56C22C38/54C22C27/04C22C30/00C22C33/02C22C1/05
Inventor 潘应君张恒陆旭锋
Owner WUHAN UNIV OF SCI & TECH
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