Method for preparing ceramic particle enhanced steel-base composite material cast by evaporative pattern casting die

A technology of lost foam casting and ceramic particles, which is used in casting molding equipment, molds, mold components, etc., can solve problems such as being unsuitable for large-scale industrial production, easy to form slag inclusions, and poor process controllability, and achieve dense organization. , Improve the bonding strength, the effect of high volume fraction

Inactive Publication Date: 2012-06-13
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it is easy to form slag inclusion defects, the process controllab

Method used

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  • Method for preparing ceramic particle enhanced steel-base composite material cast by evaporative pattern casting die
  • Method for preparing ceramic particle enhanced steel-base composite material cast by evaporative pattern casting die
  • Method for preparing ceramic particle enhanced steel-base composite material cast by evaporative pattern casting die

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] Example 1

[0025] (1) Alumina particles 2 with a particle size of -40~+60 mesh and polystyrene (EPS) foam beads 1 with a particle size of -10~+20 after aging are mixed evenly in a volume ratio greater than 2:8, Then fill the mixture into the curing cavity of the mold and heat it to form and cure with hot water to make a foam mold in which the reinforcement (hard ceramic particles) is evenly distributed, such as figure 1 Shown

[0026] (2) According to the conventional lost foam method, place the foam mold obtained in step (1) in the cavity, then melt the alloy steel Cr15 high chromium steel to a pouring temperature of 1580°C, then pour it into the cavity, and cool and solidify at room temperature. After sand cleaning, a ceramic particle reinforced steel-based composite material with hard ceramic particles dispersed in the base metal is obtained (alumina particles are the dispersed reinforcement phase, and Cr15 high chromium steel is the base material).

Example Embodiment

[0027] Example 2

[0028] (1) Mix the silicon carbide and tungsten carbide particles with a particle size of 60 mesh with the matured 20 mesh polymethyl methacrylate (PMMA) foam beads in a volume ratio greater than 2:8, and then fill the mixture into the mold Carry out steam cylinder foaming molding and curing in the curing cavity of, to make a foam mold in which reinforcements (hard ceramic particles) are evenly distributed;

[0029] (2) According to the conventional lost foam method, place the foam mold obtained in step (1) in the cavity, and then smelt low carbon steel (ordinary carbon steel) to a pouring temperature of 1580℃, then pour it into the cavity and cool at room temperature After solidification and sand cleaning, a ceramic particle-reinforced steel-based composite material with hard ceramic particles dispersed in the base metal is obtained (tungsten carbide and silicon carbide particles are the dispersed reinforcing phase, and low-carbon steel is the base material).

Example Embodiment

[0030] Example 3

[0031] (1) Mix 80 mesh silicon carbide, tungsten carbide and silicon nitride particles with 20 mesh polymethyl methacrylate (PMMA) foam beads after aging in a volume ratio of less than 2:8, and then mix The mixture is filled into the curing cavity of the mold for press foam molding and curing to produce a foam mold with reinforcements (hard ceramic particles) uniformly distributed, such as figure 1 Shown

[0032] (2) According to the conventional lost foam method, place the foam mold obtained in step (1) in the cavity, and then smelt the ductile iron QT500 to the pouring temperature of 1530 ℃, pour it into the cavity, cool and solidify at room temperature, and clear the sand After treatment, a ceramic particle-reinforced steel-based composite material in which hard ceramic particles are dispersed in the base metal is obtained (tungsten carbide, silicon carbide and silicon nitride particles are the dispersed reinforcing phase, and QT500 is the base material).

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Abstract

The invention provides a method for preparing a ceramic particle enhanced steel-base composite material cast by an evaporative pattern casting die. The method comprises the following steps of: uniformly mixing hard ceramic particles and aged foam beads according to any proportion, and filling the mixture into a curing die cavity of the die for curing to manufacture a foam die in which enhancement bodies are uniformly distributed; and then shaping according to the conventional evaporative pattern casting method, putting the obtained foam die into the cavity, smelting a base metal material to pouring temperature, pouring the base metal material into the cavity, cooling and solidifying the base metal material at room temperature, and clearing sand away from the base metal material to obtain the ceramic particle enhanced steel-base composite material, of which the hard ceramic particles are dispersed in the base metal. The preparation method is easy to operate, high in whole performance and high in yield rate; furthermore, in spite of whole enhancement and partial enhancement, various metal-base composite material parts can be directly made without secondary processing; the method is suitable for large-scale industrial production, and can be widely applied to anti-abrasion fields, such as mines, power, metallurgy, coals, building materials and the like.

Description

technical field [0001] The invention belongs to the technical field of metal matrix composite materials, in particular to a preparation method of lost foam casting ceramic particles reinforced steel matrix composite materials. Background technique [0002] The development of modern industry has higher and higher requirements on the wear resistance of materials. Mining machinery, engineering machinery, agricultural machinery and various crushing and grinding machinery are used in metallurgy, mining, building materials, electric power, chemical industry, coal and agriculture. , The wearing parts of these mechanical equipment are subject to the wear and tear of various materials and grinding bodies such as sand, ore, soil, etc., and consume a large amount of metal every year. According to incomplete statistics, 1 / 3 to 1 / 2 of energy consumption is related to friction and wear. For materials, about 80% of the failures of parts are caused by wear, and about 50% of them fail due t...

Claims

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Application Information

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IPC IPC(8): B22D19/14B22C9/04
Inventor 蒋业华隋育栋李祖来黄汝清周荣
Owner KUNMING UNIV OF SCI & TECH
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