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Preparation method of NbC reinforced iron-based alloy high-strength wear-resistant coating

A wear-resistant coating, iron-based alloy technology, applied in metal material coating process, coating and other directions, can solve the problems of defects, coating crack driving force, high Cr element content, low cost, residual stress and The effect of small crack driving force and high energy utilization rate

Pending Publication Date: 2022-04-08
ZHIBO LUCCHINI RAILWAY EQUIP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the hardness of the cladding layer prepared by this method is high, the content of Cr element is too high, and the driving force of coating cracks is relatively large, resulting in serious defects.

Method used

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  • Preparation method of NbC reinforced iron-based alloy high-strength wear-resistant coating
  • Preparation method of NbC reinforced iron-based alloy high-strength wear-resistant coating
  • Preparation method of NbC reinforced iron-based alloy high-strength wear-resistant coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Configure the powder required for the cladding layer, that is, the cladding material: FeCrNiMo alloy powder with a powder particle size of 50-150 μm is used as the cladding material, and then NbC powder with a mass fraction of 20% is added as a ceramic reinforcement phase. Put the prepared mixed powder into the ball mill, and ball mill and mix to obtain the required cladding material, wherein the FeCrNiMo alloy powder is composed of the following components: 0.1 part of C, 1 part of Mo, 2 parts of Ni, 1 part of Co, 18 parts of Cr, 1 part Part Si, the rest is Fe;

[0029] (2) The mixed powder is prepared by high-energy ball milling method. The specific steps are: add the mixed powder into the ball milling tank respectively, vacuumize, and control the mass ratio of ball to material to 6:1; the rotating speed is 80r / min; the ball milling time is 2h, Mix the two powders evenly; the ball mill tank used is a vacuum stainless steel tank, and the balls used are stainless st...

Embodiment 2

[0034] (1) Configure the powder required for the cladding layer, that is, the cladding material: FeCrNiMo alloy powder with a powder particle size of 50-150 μm is used as the cladding material, and then NbC powder with a mass fraction of 10% is added as a ceramic reinforcement phase. Add the prepared mixed powder into the ball mill, and ball mill and mix to obtain the required cladding material. The FeCrNiMo alloy powder is composed of the following components: 0.5 parts of C, 2 parts of Mo, 6 parts of Ni, 2.5 parts of Co, 19 parts of Cr, 1.5 parts of Si, the rest is Fe;

[0035] (2) The mixed powder is prepared by high-energy ball milling method. The specific steps are: add the mixed powder into the ball milling tank respectively, vacuumize, and control the mass ratio of ball to material to 6:1; the rotating speed is 80r / min; the ball milling time is 2h, Mix the two powders evenly; the ball mill tank used is a vacuum stainless steel tank, and the balls used are stainless stee...

Embodiment 3

[0040](1) Configure the powder required for the cladding layer, that is, the cladding material: FeCrNiMo alloy powder with a powder particle size of 50-150 μm is used as the cladding material, and then NbC powder with a mass fraction of 5% is added as a ceramic reinforcement phase. Add the prepared mixed powder into a ball mill, and ball mill to obtain the desired cladding material. Among them, the FeCrNiMo alloy powder is composed of the following components: 1 part of C, 3 parts of Mo, 10 parts of Ni, 4 parts of Co, 20 parts of Cr, 2 parts Si, the rest is Fe;

[0041] (2) The mixed powder is prepared by high-energy ball milling method. The specific steps are: add the mixed powder into the ball milling tank respectively, vacuumize, and control the mass ratio of ball to material to 6:1; the rotating speed is 80r / min; the ball milling time is 2h, Mix the two powders evenly; the ball mill tank used is a vacuum stainless steel tank, and the balls used are stainless steel balls. ...

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Abstract

The invention discloses a preparation method of an NbC-reinforced iron-based alloy high-strength wear-resistant coating, which comprises the following steps: step 1, preparing powder required by a cladding layer: taking FeCrNiMo alloy powder with the powder particle size of 53-150 mu m as a cladding material, and then respectively adding 5-20% by mass of NbC powder as a ceramic reinforced phase, adding the prepared mixed powder into a ball mill, and carrying out ball milling and mixing to obtain the required dressing; secondly, a preset layer is prepared through layer-by-layer laying and laser cladding; according to the method, the NbC powder reinforced FeCrNiMo alloy high-strength wear-resistant coating can be laser-cladded on the surface of the axle steel substrate, due to the fact that mutation of components is avoided, the components between the cladding layer and the substrate are similar and are in uniform transition, energy at cladding layer interfaces is low, the cladding layer interfaces are in good metallurgical bonding, and the service life of the cladding layer is prolonged. And the residual stress and crack driving force of the coating are relatively small.

Description

technical field [0001] The invention relates to the field of laser cladding, in particular to a preparation method of an NbC-strengthened iron-based alloy high-strength wear-resistant coating. Background technique [0002] Shaft parts are one of the key components of mechanical equipment such as aviation and automobiles. They mainly bear the centrifugal force, transmit torque and support the transmission of other parts, and work in high temperature and high speed environments. The surface is prone to friction, wear, extrusion and corrosion. and impact failures. Under long-term work, the size of the shaft parts will be reduced and the loss will be huge, which will seriously affect the mechanical properties of the equipment and even cause loss of life and property. However, the shaft parts of large equipment have a long working cycle, replacement and maintenance are not timely, and new shafts must be replaced. The cost is high, and it also causes a waste of resources, which v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C30/00C22C32/00
Inventor 郭文荣辉小斌霍锋锋王锐郭亮高利勇李鹏程赵京贝李晓峰谢会起易鸿
Owner ZHIBO LUCCHINI RAILWAY EQUIP