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Preparation method of in-situ self-generated wc+tic composite reinforced iron-based wear-resistant coating

A composite reinforcement and wear-resistant coating technology, which is applied in the field of wear-resistant coatings, can solve problems such as the mismatch between the hardness of the reinforcement phase and the matrix, and achieve the effects of strong adaptability to shape and size, simple equipment, and cheap raw materials

Inactive Publication Date: 2017-04-05
HUBEI UNIV OF AUTOMOTIVE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, these two reinforcements are mostly independently reinforced, and there are some problems such as the mismatch between the reinforcement phase and the hardness of the matrix in use.

Method used

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  • Preparation method of in-situ self-generated wc+tic composite reinforced iron-based wear-resistant coating
  • Preparation method of in-situ self-generated wc+tic composite reinforced iron-based wear-resistant coating
  • Preparation method of in-situ self-generated wc+tic composite reinforced iron-based wear-resistant coating

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment

[0024] Carry out mechanical processing on the substrate to make suitable tools or molds, and clean the grease on the surface with acetone; if it is to remanufacture the failed parts, it is necessary to sandblast or polish the surface with a hand-held grinding wheel, and clean the grease on the surface with acetone Grease; put the pre-treated substrate into the workpiece table, and clamp and fix it.

[0025] The preparation of the in-situ synthesized TiC+WC composite reinforced coating on the surface of the substrate is completed through three examples below.

Embodiment 1

[0027] According to mass percentage, 38% W powder (W≥99.8%, particle size 40~80μm), 0.2% Ti powder (Ti≥99.0; Fe≤0.25%; Si≤0.1%; O≤0.65%, particle size 40~ 80μm), 3.18% C powder (C≥98%, particle size 20~40μm), the balance is Fe-Ni self-fluxing alloy powder (Ni=30%; Re=1%; Fe=69%, particle size is 60 ~180μm) after drying, stir evenly, pre-load it into a high-temperature resistant ceramic sleeve bonded to the surface of low-carbon steel Q235, and heat it with a plasma beam. The process is: non-arc (non-transferred plasma arc), current 25-45A , Voltage 40-55V, heating time 4-6 seconds; arc transfer (transferred plasma arc), current 30-50A, voltage 40-60V, heating time 6-8 seconds, the coating is naturally cooled to room temperature in the air.

[0028] The obtained TiC+WC composite reinforced iron-based coating was subjected to a grinding test (pressure 300N, sliding 500 meters) with a T10 grinding sample (Rockwell hardness HRC=63±1) on an M-2000 wear testing machine. Compared wi...

Embodiment 2

[0030] According to mass percentage, 38% W powder (W≥99.8%, particle size 40~80μm), 0.3% Ti powder (Ti≥99.0; Fe≤0.25%; Si≤0.1%; O≤0.65%, particle size 40~ 80μm), 3.18% C powder (C≥98%, particle size 20~40μm), the balance is Fe-Ni self-fluxing alloy powder (Ni=30%; Re=1%; Fe=69%, particle size is 60 ~180μm) after drying, stir evenly, pre-load it into a high-temperature resistant ceramic sleeve bonded to the surface of low-carbon steel Q235, and heat it with a plasma beam. The process is: non-arc (non-transferred plasma arc), current 25-45A , Voltage 40-55V, heating time 4-6 seconds; arc transfer (transferred plasma arc), current 30-50A, voltage 40-60V, heating time 6-8 seconds, the coating is naturally cooled to room temperature in the air.

[0031] The obtained TiC+WC composite reinforced iron-based coating was subjected to a grinding test (pressure 300N, sliding 500 meters) with a T10 grinding sample (Rockwell hardness HRC=63±1) on an M-2000 wear testing machine. Compared wi...

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Abstract

The invention discloses a preparation method for an in-situ synthesized WC and Tic composite reinforced iron-based wear-resistant coating. The method comprises the following steps: firstly uniformly mixing W, TI, C and Fe-Ni self-flux alloy powder, and then loading the W, TI, C and Fe-Ni self-flux alloy powder into a high-temperature-resistant ceramic bushing bonded to a base plate; prefusing surface layer powder through a plasma non-transferred arc, and fusing inner layer powder and the base plate through the plasma non-transferred arc; finally ensuring that coating melt is naturally cooled in the high-temperature-resistant ceramic bushing. Reinforcement prepared through the method belongs to composite enhancement of TiC and WC of different-scale carbides, compared with single carbide WC, the reinforcement ensures that the coating abrasion loss is reduced by 23 to 62 percent, and the abrasion resistance is greatly improved; the adhesion strength between the in-situ synthesized enhancement phase and a base body is large, and the in-situ synthesized enhancement phase has low probability of falling off from an abrasive surface.

Description

technical field [0001] The invention relates to the field of wear-resistant coatings, in particular to a preparation method of in-situ self-generated WC+TiC composite reinforced iron-based wear-resistant coatings. Background technique [0002] Currently, more than half of the world's total energy is consumed by one or more forms of friction. In 2006, the loss caused by friction and wear in my country was as high as 950 billion yuan, and 320 billion yuan could be saved by improving and reducing friction and wear. In order to improve the wear resistance of metals, surface technology is usually used to obtain wear-resistant coatings. Coating materials are mostly composite materials, and carbides with high hardness and wear resistance are often used as reinforcement phases. TiC and WC are two important types of carbides. For example, the smaller TiC particles (5-15 μm) are the reinforcing phase of titanium-based composites and are used in the aerospace field; the larger-sized ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10B22F1/00
CPCB22F1/0003C23C24/10
Inventor 袁有录曾大新
Owner HUBEI UNIV OF AUTOMOTIVE TECH
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