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A preparation method of tungsten carbide particle reinforced monolithic iron-based composite material

A technology of iron-based composite materials and tungsten carbide particles, which is applied in the direction of manufacturing tools, casting molding equipment, metal processing equipment, etc.

Active Publication Date: 2021-06-01
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the problem that the existing lost foam casting infiltration method can only form a composite layer on the surface of the product, the present invention provides a preparation method of tungsten carbide particle reinforced integral iron-based composite material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] This embodiment provides a method for preparing a tungsten carbide particle-reinforced integral iron-based composite material, comprising the following steps:

[0019] 1. Pour the aqueous dispersion of phenolic resin with a concentration of 0.02g / mL equivalent to 0.3% of the volume of the lost foam into a mixer equipped with EPS beads (particle size 1-2mm), soak the beads, and then pour Add WC particles (particle size: 6.5-21 μm) equivalent to 6% of the volume of the lost foam, and stir and mix for 10 minutes, so that the EPS beads and WC particles are uniformly mixed. Inhale the material into the material storage tank, apply pressure to the material storage tank, let the material be filled into the mold through the material gun, feed steam at 110-130 °C, keep warm for 2 minutes, and water-cool to obtain the lost foam.

[0020] 2. Brush the surface of the obtained lost foam with refractory paint, dry it in a drying room at 45°C, apply it again, and dry it again, repeat ...

Embodiment 2

[0023] This embodiment provides a method for preparing a tungsten carbide particle-reinforced integral iron-based composite material, comprising the following steps:

[0024] 1. Pour the aqueous dispersion of phenolic resin with a concentration of 0.03g / mL equivalent to 0.4% of the volume of the lost foam into a mixer equipped with EPS beads (particle size 1-2mm), soak the beads, and then pour Add WC particles (6.5-21 μm in particle size) corresponding to 8% of the volume of the lost foam, and stir and mix for 10 minutes, so that the EPS beads and WC particles are uniformly mixed. Inhale the material into the material storage tank, apply pressure to the material storage tank, let the material be filled into the mold through the material gun, pass in steam at 110-130°C, keep warm for 3 minutes, and water-cool to obtain the lost foam.

[0025] 2. Brush the surface of the obtained lost foam with refractory paint, dry it in a drying room at 50°C, apply it again, and dry it again t...

Embodiment 3

[0028] This embodiment provides a method for preparing a tungsten carbide particle-reinforced integral iron-based composite material, comprising the following steps:

[0029] 1. Pour the aqueous dispersion of phenolic resin with a concentration of 0.04g / mL equivalent to 0.5% of the volume of the lost foam into a mixer equipped with EPS beads (particle size 1-2mm), soak the beads, and then pour Add WC particles (6.5-21 μm in particle size) corresponding to 8% of the volume of the lost foam, and stir and mix for 10 minutes, so that the EPS beads and WC particles are evenly mixed. Inhale the material into the material storage tank, apply pressure to the material storage tank, let the material be filled into the mold through the material gun, pass in steam at 110-130°C, keep warm for 3 minutes, and water-cool to obtain the lost foam.

[0030] 2. Brush the surface of the obtained lost foam with refractory paint, dry it in a drying room at 60°C, apply it again, and dry it again, rep...

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PUM

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Abstract

The invention relates to the technical field of composite materials, in particular to a method for preparing a tungsten carbide (WC) particle-reinforced integral iron-based composite material. The preparation method is as follows: using phenolic resin water dispersion as a binder, making tungsten carbide particles and polystyrene foam (EPS) beads into a lost foam, coating the surface with refractory paint, embedding molding sand after drying, and pouring into the The high chromium cast iron melt is obtained after cooling and solidification. The preparation method makes use of the overloading effect of the pattern carrier and the wrapping effect of the molten iron to mix the WC particles into the high-chromium cast iron melt. By optimizing each parameter, the prepared composite material can have uniformly distributed WC particles inside, and the The preparation method is capable of preparing articles of various shapes, including structurally complex components.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a method for preparing a tungsten carbide particle-reinforced integral iron-based composite material. Background technique [0002] The ever-growing modern industry requires more mechanical components that can work under conditions of high temperature, high speed and frequent wear, such as hammer heads of crushers, brake pads of high-speed trains, roller rings and guide wheels of high-speed wire mills, etc. Particle-reinforced iron-based composite materials are made of iron and steel materials with high stiffness, strength and hardness as the matrix, and hard particles as the reinforcing phase. Processability and electrical and thermal conductivity, as well as high hardness, good thermal stability and low expansion coefficient of hard particles, meet the needs of modern industry and have good development and application prospects. [0003] The main preparation method...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C7/02B22C9/04B22D27/20C22C33/08
CPCB22C7/023B22C9/046B22D27/20C22C33/08
Inventor 谭建波马国彬
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY