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Alloy powder and application thereof into laser cladding

A technology of alloy powder and laser cladding, which is applied in the coating process and coating of metal materials, can solve the problems of cracks in the cladding layer, easy cracking of multiple layers, unstable performance, etc., and achieve excellent cladding performance , Improve the performance of multi-layer and large-area cladding, and improve the quality of grain boundaries

Inactive Publication Date: 2021-09-21
沈阳稀有金属研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, at present, laser cladding generally has the problem of easy cracking of multiple layers and large areas. This is because the laser cladding layer generally requires high hardness, which leads to poor toughness. The cladding layer with a large area is prone to cracks and bubbles, resulting in unstable performance
How to avoid cracks and air bubbles in multi-layer and large-area cladding layers while ensuring hardness is a technical problem that those skilled in the art need to solve urgently

Method used

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  • Alloy powder and application thereof into laser cladding
  • Alloy powder and application thereof into laser cladding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Laser cladding treatment is performed on the surface of the failed hydraulic cylinder (the material is low alloy carbon steel). The alloy powder for laser cladding is composed of the following elements by weight percentage (wt%): C: 0.45; Cr: 15.5; Ni: 2.0 ;Mo:1.6;Nb:1.5;N:0.3;Mn:0.4;V:1.1;Si:1.2;B:1.2;Ce:1.3;Y 2 o 3 : 0.45; the balance is Fe.

[0033] A 4 kilowatt semiconductor laser is used for laser cladding. The parameters of laser cladding are: power 3000W; focal length 280mm; spot diameter 6mm; scanning speed 360mm / min; powder thickness 0.8mm;

[0034] The alloy powder was dried at 120°C for 1.5 hours before cladding.

[0035] Results: There are three cladding layers in total, the total thickness of cladding is 2.5mm; the cladding area is 1.2 square meters; the hardness measured by multi-point testing is HRC55-58; the cladding layer has no cracks or bubbles through non-destructive testing; The machine company installed it in the underground operation area. Afte...

Embodiment 2

[0037] Laser cladding is carried out on the failed structural steel major shaft of the steel company (the material is low alloy structural steel). The alloy powder for laser cladding is composed of the following elements by weight percentage (wt%): C: 0.5; Cr: 16.2; Ni: 2.4;Mo:1.5;Nb:2.4;N:0.35;Mn:0.45;V:1.2;Si:1.3;B:1.1;Ce:1.4;Y 2 o 3 : 0.5; the balance is Fe.

[0038] A 3 kilowatt semiconductor laser is used for laser cladding. The parameters of laser cladding are: power 2600W; focal length 280mm; spot diameter 4mm; scanning speed 240mm / min; powder thickness 1.1mm;

[0039] The alloy powder was dried at 150°C for 1.5 hours before cladding.

[0040] Results: There are three cladding layers in total, and the total cladding thickness is 3mm; the cladding area is 1.2 square meters; the hardness measured by multi-point testing is HRC52-55; the cladding layer has no cracks or bubbles through non-destructive testing; resume the machine The use effect is good, the wear resistance i...

Embodiment 3

[0042] Laser cladding is performed on the intermediate flange shaft (the material is 42CrMo steel). The alloy powder for laser cladding is composed of the following elements by weight percentage (wt%): C: 0.6; Cr: 12.0; Ni: 1.2; Mo: 3.0; Nb: 2.8; N: 0.5; Mn: 0.3; V: 0.8; Si: 2.0; B: 0.8; Ce: 1.6; 2 o 3 : 0.4; the balance is Fe.

[0043] A 3 kilowatt semiconductor laser is used for on-site laser cladding. The parameters of laser cladding are: power 3800W; focal length 300mm; spot diameter 6mm; scanning speed 400mm / min; powder thickness 1.2mm;

[0044] The alloy powder was dried at 150°C for 1.8 hours before cladding.

[0045] Results: A total of four cladding layers were clad, with a total cladding thickness of 4.8 mm; cladding area of ​​1.5 square meters; the hardness measured by multi-point testing was HRC47-50; the cladding layer had no defects such as cracks and bubbles through non-destructive testing.

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Abstract

The invention discloses alloy powder and application thereof into laser cladding, and belongs to the technical field of metal materials and laser cladding. The alloy powder is composed of elements and compounds of C, Cr, Ni, Mo, Nb, N, Mn, V, Si, B, Ce, Fe and Y2O3. Alloy matrix strengthening elements (Nb, Mn and N), grain boundary strengthening elements (Ce and Y2O3) and various element materials (V, Si and B) capable of reducing the melting point and improving the performance are added into a designed iron-chromium-nickel-molybdenum alloy, the proper content of all the elements is designed and adjusted, so that the alloy powder forms a coherent and stable intermetallic compound gamma'-Ni3Nb, a matrix containing a dispersed phase and a second-phase strengthened structure after cladding and solidification, and under the condition that the hardness of the cladding layer is guaranteed, the technical problems that multiple laser cladding layers are generated, and large-area cracking is prone to happening are solved.

Description

technical field [0001] The invention relates to the technical field of metal materials and laser cladding, in particular to an alloy powder and its application in laser cladding. Background technique [0002] As an advanced remanufacturing technology, laser cladding has been rapidly promoted and widely used with the continuous improvement of laser power and stability, as well as the in-depth research of laser processing technology and supporting powder materials. Laser cladding is an advanced remanufacturing technology for preparing a high-performance surface coating that is firmly metallurgically bonded to the substrate on the metal surface. It can clad high-melting point alloy materials on the surface of low-melting point substrates, or on the surface of low-performance substrates. Prepare high-performance coatings to replace a large number of advanced, high-performance overall materials, save precious metals, or repair damaged parts, reduce parts costs, improve the perfor...

Claims

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Application Information

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IPC IPC(8): C23C24/10B22F1/00C22C38/02C22C38/04C22C38/06C22C38/44C22C38/46C22C38/48C22C38/54
CPCC23C24/103C22C38/44C22C38/48C22C38/46C22C38/54C22C38/02C22C38/04C22C38/06C22C38/005C22C38/001
Inventor 许广和陈常义许圣宇高婷曾光苍鸣
Owner 沈阳稀有金属研究所
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