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Preparation method of WC-Cr3C2 ceramic coating ferrum radical surface composite material having mesh structure

A surface composite material and ceramic coating technology, which is applied in the field of preparation of carbide ceramic/iron-based surface composite materials, can solve the problems of plastic deformation and high temperature softening of matrix materials, hinder dislocation movement and other problems, and achieve a dense and good microstructure. , The hardness and friction and wear performance are improved, and the effect of good wear resistance

Inactive Publication Date: 2009-05-27
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially when the reinforcement phase particles form a network structure, it will seriously hinder the movement of dislocations, which can restrict the plastic deformation and high temperature softening of the matrix material

Method used

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  • Preparation method of WC-Cr3C2 ceramic coating ferrum radical surface composite material having mesh structure
  • Preparation method of WC-Cr3C2 ceramic coating ferrum radical surface composite material having mesh structure
  • Preparation method of WC-Cr3C2 ceramic coating ferrum radical surface composite material having mesh structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] After pickling and derusting 45# steel with a size of 70mm×40mm×5mm, the surface is polished with 180# water sandpaper, then pickled to roughen the surface, ultrasonically cleaned and put into a graphite mold; according to the chemical reaction of each layer Formula metering ratio reactant (see table 1), carry out pre-mixing respectively in the mixer respectively, pre-mixing time 6 hours, dry respectively at 80 ℃;

[0049] Lay each layer of materials on the 45# steel substrate in the order of the reaction wetting layer, the bonding phase generating layer, the reinforcing phase generating layer (laying raw material B first, then laying raw material A) and the heat supplement and surface modification layer;

[0050] Put the above reaction system into a reaction vessel for preheating, raise the temperature of the system to the preheating temperature of 250°C at a heating rate of 10°C / min, keep it warm for 10 minutes, and pressurize it to 5MPa with argon. Then use tungsten ...

Embodiment 2

[0062] The amount of raw material A used to generate WC is 36g, and the amount of generated Cr 3 C 2 The amount of raw material B is 24g, the mass ratio of the two is 1.5:1, and the rest of the composition remains unchanged; the argon gas is pressurized to 15MPa, and the rest of the preparation process and technology are the same as in Example 1. The obtained ceramic-coated iron-based surface composite has a hardness of 6.9 GPa and a wear volume of about 3.9×10 4 μm 3 .

Embodiment 3

[0064] The amount of raw material A used to generate WC is 40g, and the amount of generated Cr 3 C 2 The amount of raw material B is 20g, the mass ratio of the two is 2.0:1, the rest of the composition remains unchanged, and the preparation process and process are the same as in Example 1. The hardness of the obtained ceramic-coated iron-based surface composite is 7.1 GPa, and the wear volume is about 3.7×10 4 μm 3 .

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Abstract

The invention discloses a composite material, making method and equipment of WC-Cr3C2 ceramic coating iron-base surface, which is characterized by the following: making reinforced phase of WC-Cr3C2 ceramic of composite material at three-dimensional network structure; piling adhesive phased material, reacting wetting mass and each material sequently; saving energy; improving the purity of coating with higher hardness and excellent abrasion-proof property.

Description

technical field [0001] The present invention relates to a preparation method of carbide ceramics / iron-based surface composite material, specifically, it utilizes combustion synthesis technology to prepare WC-Cr with network structure 3 C 2 Method for ceramic-coating iron-based surface composites. Background technique [0002] Iron-based materials are the most widely used structural materials. With the rapid development of modern industry, the requirements for iron-based materials are getting higher and higher. In many occasions, structural parts that work under harsh conditions such as high temperature, high speed, abrasion, and oxidation are urgently needed. , and the existing iron-based materials are increasingly difficult to meet the actual needs. Therefore, it is very urgent and important to research and develop iron-based composite materials with excellent performance and low price. [0003] In actual production, the failure of materials usually starts from the surfac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/06C04B35/56C23D5/00C22C1/04
Inventor 李文戈尹莉张光钧李军
Owner SHANGHAI UNIV OF ENG SCI