Prefabricated part of composite abrasion-resistant part and method for manufacturing abrasion-resistant part with same

A technology of composite wear-resistant parts and prefabricated bodies, which is applied in the field of composite wear-resistant parts prefabricated bodies, can solve problems such as poor wetting performance of molten metal, limited application range, and easy production process defects, etc., and achieves convenience for large-scale mass production and simple methods , Guarantee the effect of wear resistance

Inactive Publication Date: 2010-12-01
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The Chinese invention patent (CN 1147373C) made particle-reinforced composite materials into local reinforcements, which can avoid the brittleness of the whole composite reinforcement, but the scope of application is limited, and it can only be used for products such as guide plates for rolling steel. Changes were made in the preparation; the Chinese invention patent (CN 101412095A) uses a low-carbon steel thin steel plate to wrap alloy powder and particles to control the distribution of composite materials, but the thin steel plate cannot be melted at high temperature and remains in the casting to become a weak part. And the operation is complicated
The Chinese invention patent (CN 101585081A) uses a binder and an appropriate mold to prepare a prefabricated body, and then pours it. The operation is simple and can be mass-produced, which provides a good idea, but the amount of binder used will affect the casting penetration; China Invention patent (CN 1114513C) uses a casting method to embed an insert composed of ceramic particles on the working surface of the wear-resistant part. The insert is distributed in a honeycomb shape and has good wear resistance and impact resistance, but the particles used are oxidized Zirconium toughened alumina particles, poor wetting performance with molten metal, difficult to manufacture, prone to defects in the production process

Method used

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  • Prefabricated part of composite abrasion-resistant part and method for manufacturing abrasion-resistant part with same
  • Prefabricated part of composite abrasion-resistant part and method for manufacturing abrasion-resistant part with same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: hammer crusher hammer

[0028] 1. Preparation of prefabricated body

[0029] 1) First, mechanically mix ceramic particles with a particle size of 8-60 mesh and metal powder using absolute ethanol to obtain a mixture, wherein the ceramic particles are WC, and the metal powder is reduced iron powder with a particle size of 150-300 mesh; the metal powder The addition amount is 8% of the mass of the ceramic particles, and the addition of absolute ethanol is 4% of the mass of the ceramic particles;

[0030] 2) Next, fill the mixture into cylindrical, strip-shaped, and honeycomb graphite molds. In order to prevent mold sticking, a layer of graphite paper with a thickness of 0.4-0.6mm is placed between the mixed particles and the graphite mold. Dry the mixture to obtain mixed particles, and then put the mold together with the mixed particles into a vacuum sintering furnace at 1300 ° C and a vacuum degree of 10 -1 Sintering at Pa for 60 minutes, the metal powder wi...

Embodiment 2

[0034] Example 2: Crusher blow bar

[0035] 1. Preparation of prefabricated body

[0036] 1) First, mechanically mix the metal powder of ceramic particles with a particle size of 8-60 mesh with absolute ethanol to obtain a mixture, wherein the ceramic particles are TiC, and the metal powder has a particle size of 150-300 mesh with a mass percentage of 30%-45 % of high-carbon ferrochrome powder, and the balance is reduced iron powder; the metal powder is added in an amount of 5% of the mass of ceramic particles, and the amount of absolute ethanol is 3% of the mass of ceramic particles or hard alloy particles;

[0037] 2) Next, fill the mixture into a cylindrical graphite mold. In order to prevent sticking to the mold, place a layer of graphite paper with a thickness of 0.4-0.6mm between the mixed particles and the graphite mold, and dry the mixture at 80°C to obtain the mixed particles , and then put the mold together with the mixed particles into a vacuum sintering furnace at...

Embodiment 3

[0040] Embodiment 3: vertical cement grinding roller

[0041] 1. Preparation of prefabricated body

[0042] 1) First, mechanically mix ceramic particles with a particle size of 8-60 mesh and metal powder using absolute ethanol to obtain a mixture, wherein the ceramic particles are Cr 3 C 2 , the metal powder adopts high-carbon ferrochrome powder with a particle size of 150-300 mesh and a mass percentage of 30%-45%, and the balance is reduced iron powder; the metal powder is added in an amount of 2% of the mass of ceramic particles, and absolute ethanol The amount added is 2% of the mass of ceramic particles or cemented carbide particles;

[0043] 2) Next, the mixture is filled in a honeycomb graphite mold. In order to prevent sticking, a layer of graphite paper with a thickness of 0.4-0.6mm is placed between the mixed particles and the graphite mold, and the mixture is dried at 80°C to obtain a mixed Particles, and then put the mold together with the mixed particles into th...

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Abstract

The invention relates to a prefabricated part of a composite abrasion-resistant part and a method for manufacturing the abrasion-resistant part with the same. The prefabricated part is formed by mixing metal powder with carbide ceramic particles or particles by crushing a hard alloy and sintering the mixture at a high temperature and can be made into special shapes of columns, strips, blocks, honeycombs, and the like. The method comprises the following steps of: regularly arranging prefabricated parts on the end surface of a cast form; casting liquid metal by adopting a common or negative pressure cast method; impregnating the liquid metal into the prefabricated parts to form an abrasion-resistant part of a composite material, wherein the surface layer of the abrasion-resistant part comprises a matrix metal and a composite material. The abrasion-resistant part of the composite material, which is made by using the method, ensures the wear-resistant performance of the abrasion-resistant part and has high anti-impact capability.

Description

technical field [0001] The invention relates to a prefabricated body of a composite wear-resistant part suitable for a crusher hammer head, a blow bar, a large cement grinding roller and a grinding disc, and a method for manufacturing the wear-resistant part with the prefabricated body. Background technique [0002] Wearable parts used in grinding equipment and crushing equipment encountered in cement, mining, metallurgy, power station or various similar industries. These parts usually require good overall mechanical properties, and it is desirable that these parts not only have high wear resistance, but also have a certain degree of toughness, so as to have mechanical strength such as impact resistance and be able to be machined. [0003] These two properties are notoriously difficult to reconcile in the same material. In order to solve this contradiction, the use of composite materials is a better choice. Someone put forward the concept of surface composite material, for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C29/00B22D19/02
Inventor 高义民郑开宏史芳杰李烨飞王娟李林尹宏飞邢建东王海燕苏志辉
Owner XI AN JIAOTONG UNIV
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