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Wear-resistant material, preparation method and application

A wear-resistant material, stirring grinding technology, applied in the direction of metal material coating process, coating, melting spray plating, etc., can solve the problems of poor toughness and easy chipping, the hob is not wear-resistant, fractured, etc., and achieves low porosity. , uniform thickness and high efficiency

Active Publication Date: 2020-11-20
CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention proposes a wear-resistant material, preparation method and application, which solves the current problems of hobs not wear-resistant, poor toughness and easy to chip and break

Method used

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  • Wear-resistant material, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A wear-resistant material powder, including the following components in mass percentage: ceramic tungsten carbide powder 20%, Mo-B powder 60%, metal Co powder 5%, large tungsten carbide particles 4%, and the balance is Fe. The particle size of the ceramic tungsten carbide powder is 30 μm, and that of the Mo-B powder is 35 μm.

[0041] Wherein the preparation of Mo-B powder is as follows:

[0042] Step 1: Put Mo powder and B powder in a hydrogen reduction furnace for reduction respectively to obtain reduced Mo powder and reduced B powder; the reduction temperature of Mo powder is 1100°C, and the reduction temperature of B powder is 1200°C;

[0043] Step 2: Add the reduced Mo powder and the reduced B powder into the stirring mill tank according to the molar ratio of 2:1 to stir the abrasive to obtain the Mo-B mixed powder; the time for stirring the abrasive is 100h, and the rotating speed is 800r / min;

[0044] Step 3: put the Mo-B mixed powder into a vacuum drying oven f...

Embodiment 2

[0058] A wear-resistant material powder, including the following components in mass percentage: ceramic tungsten carbide powder 22%, Mo-B powder 50%, metal Co powder 8%, large tungsten carbide particles 4%, and the balance is Fe. The particle size of the ceramic tungsten carbide powder is 35 μm, and that of the Mo-B powder is 40 μm.

[0059] Wherein the preparation of Mo-B powder is as follows:

[0060] Step 1: Put Mo powder and B powder in a hydrogen reduction furnace for reduction respectively to obtain reduced Mo powder and reduced B powder; the reduction temperature of Mo powder is 1300°C, and the reduction temperature of B powder is 1400°C;

[0061] Step 2: Add the reduced Mo powder and the reduced B powder into the stirring mill tank according to the molar ratio of 2:1 to stir the abrasive to obtain the Mo-B mixed powder; the time for stirring the abrasive is 110 hours, and the rotation speed is 600r / min;

[0062] Step 3: Put the Mo-B mixed powder into a vacuum drying o...

Embodiment 3

[0076] A wear-resistant material powder, including the following components in mass percentage: ceramic tungsten carbide powder 25%, Mo-B powder 40%, metal Co powder 10%, large tungsten carbide particles 4%, and the balance is Fe. The particle size of the ceramic tungsten carbide powder is 40 μm, and that of the Mo-B powder is 50 μm.

[0077] Wherein the preparation of Mo-B powder is as follows:

[0078] Step 1: Put Mo powder and B powder in a hydrogen reduction furnace for reduction respectively to obtain reduced Mo powder and reduced B powder; the reduction temperature of Mo powder is 800°C, and the reduction temperature of B powder is 900°C;

[0079] Step 2: Add the reduced Mo powder and the reduced B powder into the stirring mill tank according to the molar ratio of 2:1 to stir the abrasive to obtain the Mo-B mixed powder; the time for stirring the abrasive is 120h, and the rotating speed is 400r / min;

[0080] Step 3: Put the Mo-B mixed powder into a vacuum drying oven fo...

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Abstract

The invention provides a wear-resistant material, a preparation method and an application. The material comprises the following components in percentage by mass: 20%-25% of ceramic tungsten carbide powder, 40%-60% of Mo-B powder, 5%-10% of metal Co powder, 4% of large tungsten carbide particles and the balance of Fe. A nano-cermet coating is prepared from a novel ceramic wear-resistant powder material, the problems of poor wear resistance of current hob rings, and failure of frequent tipping, edge rolling, abnormal wear and the like and the problems of short service life, frequent replacementand the like due to lack of wearability are solved, the nano-cermet coating is prepared from the novel ceramic wear-resistant powder material, the binding strength between the coating and a ring matrix is high, the material has good compactness, low porosity, high hardness and good wear resistance, frequent stop and hob change caused by lack of wear resistance are reduced, and powerful support andguarantee are provided for efficient tunnel construction and excavation.

Description

technical field [0001] The invention relates to the field of hob manufacturing, in particular to a wear-resistant material, a preparation method and an application. Background technique [0002] As the "teeth" of the shield / TBM, the disc-shaped hob mainly relies on the hob to squeeze the rock to achieve the purpose of breaking the rock. During the process of squeezing and breaking the rock, the hob is squeezed by rocks of different strengths on the face. Larger alternating loads, when the hob encounters boulders, upper soft rocks and lower hard formation rocks, it will bear a greater impact load. Traditional hobs often have failures such as blade ring chipping and fracture. At present, it is usually adopted in The method of cladding tungsten carbide particles on the surface of the hob increases the wear resistance of the hob, but when the hob encounters rock masses such as granite with high quartz content or basalt with strong abrasiveness, the tungsten carbide cladding laye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/14C23C4/10C23C4/134C23C4/02B22F9/22B22F3/10
CPCB22F3/1039B22F9/22B22F2201/013B22F2302/05C22C29/14C23C4/02C23C4/10C23C4/134
Inventor 卓兴建郭志凯叶蕾龙伟漾杨兴亚
Owner CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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