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Functionally-graded wear-resistant iron-based composite material and preparation method thereof

An iron-based composite material and functionally gradient technology, applied in the field of functionally graded composite materials, can solve problems such as inappropriateness, and achieve the effects of stable product quality, not easy to break and peel off, and high bonding strength

Inactive Publication Date: 2016-08-03
XIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation methods of the above several functional gradients are not suitable for the preparation of gradient wear-resistant materials suitable for strong impact wear conditions.

Method used

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  • Functionally-graded wear-resistant iron-based composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] A method for preparing a functionally graded wear-resistant iron-based composite material, comprising the following steps:

[0022] Step 1, designing and preparing a graphite mold, the shape of the inner cavity is conical, the cone angle is 30°, and the bottom diameter is 10mm;

[0023] Step 2, mechanically mixing WC ceramic particles with a particle size of 100 mesh and iron powder using absolute ethanol to obtain a mixture,

[0024] Step 3: Fill the above mixture into a graphite mold, dry it at 100°C, then put the mold and the mixed particles into a vacuum sintering furnace, and sinter at 1450°C with a vacuum degree of 10 -1 Pa. The sintering time is 45 minutes. The metal powder bonds the ceramic particles together. After cooling, the mold is opened to take out the formed preform;

[0025] Step 4, put the conical preform on the bottom of the mold, keeping a certain distance;

[0026] Step 5 Melt 45 steel in an intermediate frequency induction furnace, start the vac...

Embodiment 2

[0029] A method for preparing a functionally graded wear-resistant iron-based composite material, comprising the following steps:

[0030] Step 1, designing and preparing a graphite mold, the shape of the inner cavity is conical, the cone angle is 45°, and the bottom diameter is 15mm;

[0031] Step 2, mechanically mixing WC ceramic particles with a particle size of 100 mesh and iron powder using absolute ethanol to obtain a mixture,

[0032] Step 3: Fill the above mixture into a graphite mold, dry it at 100°C, then put the mold and the mixed particles into a vacuum sintering furnace, and sinter at 1450°C with a vacuum degree of 10 -1 Pa. The sintering time is 45 minutes. The metal powder bonds the ceramic particles together. After cooling, the mold is opened to take out the formed preform;

[0033] Step 4, put the conical preform on the bottom of the mold, keeping a certain distance;

[0034] Step 5 Melt the 40Cr steel in an intermediate frequency induction furnace, start t...

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Abstract

The invention proposes a functional gradient wear-resistant iron-based composite material and its preparation method, which is composed of a parent metal and several conical reinforcements, the bottom of the conical reinforcement is located on the upper surface of the parent metal, and the volume of the reinforcement phase The fraction gradually becomes smaller, and the reinforcement is formed by the infiltration of the ceramic particle preform and the mother liquid metal. The preparation method includes: designing and preparing a graphite mold; mechanically mixing ceramic particles and metal powder with absolute ethanol to obtain a mixture, filling the above mixture into a graphite mold, drying, and then putting the mold and the mixed particles into a vacuum sintering furnace Internal sintering. The metal powder bonds the ceramic particles together, opens the mold after cooling, and takes out the formed preform; put the conical preform on the bottom of the mold; the furnace smelts the iron-based metal to create a negative pressure atmosphere in the mold cavity, Then pour it. The preparation method has the advantages of simple process, low cost and high process stability.

Description

technical field [0001] The invention relates to a functional gradient composite material, in particular to a functional gradient wear-resistant iron-based composite material and a preparation method thereof. Background technique [0002] The mechanical equipment in cement, coal, mining, metallurgy and other industries is easily caused by the failure of the workpiece due to the wear and tear of hard materials such as sand and ore, resulting in a large consumption of energy and raw materials. Iron-based composites exhibit excellent wear resistance due to the comprehensive use of the properties of the matrix material and the reinforcing phase. However, the combination of the reinforcement phase and the matrix of iron-based composites is in a non-gradient transition, and the reinforcement phase tends to fall off or peel off as a whole under impact loads, resulting in the reinforcement phase not being able to effectively play an anti-wear role during use. [0003] There are many...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D18/06B22D23/04C22C33/02
CPCB22D23/04B22D18/06C22C33/0242
Inventor 张建军魏晓伟王剑徐磊
Owner XIHUA UNIV
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