Iron-based alloy material for laser repair of rotor main shaft and manufacturing method thereof

An iron-based alloy and laser repair technology, which is applied in the field of iron-based alloy materials, can solve problems such as high cost, long period of new rotors, and affecting the normal operation of equipment, and achieve safe and reliable operation, high quality, and reliable quality.

Inactive Publication Date: 2010-06-30
四川新吉隆环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The material of the rotor main shaft is made of medium carbon or alloy steel such as 45#, 40Cr, 42CrNiMoA according to its different load-bearing strength; the manufacture and replacement of new rotors takes a long period of time and high cost, which affects the normal operation of the equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In the manufacturing process of iron-based alloy materials, when designing the actual control ratio of the chemical composition of iron-based alloys, the influence of the percentage content of the main chemical components (mass fraction) on the production and performance of the overall design range is considered. For example, choose the chemical composition ratio to make iron-based alloy powder: (mass fraction)%

[0037] element

C

Cr

mn

Mo

Si

Ti

V

Fe

content

0.30

18

0.35

1.50

0.80

0.02

0.06

margin

[0038] Electric arc furnaces or vacuum electric furnaces are used in production. The production process of iron-based alloy powder adopts a horizontal atomization process, which is carried out under the protection of Ar gas during the whole atomization production process until the packaging.

[0039] Powder particle size: 50 ~ 150μm.

[0040] After inspection, the powder produc...

Embodiment 2

[0042] Now the chemical composition ratio of iron-based alloy powder is composed as follows according to the upper limit content: (mass fraction)%

[0043] element

[0044] The method of manufacture is in N 2 Under the protection of gas, the whole process is carried out, and the alloy powder with a particle size of 100-325 μm is produced. After inspection, the particles are solid, the satellite particle powder rate is not more than 3%, and the physical properties have not changed, which meets the design requirements.

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PUM

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Abstract

The invention relates to an iron-based alloy material for laser repair of a rotor main shaft. The iron-based alloy material comprises the following chemical components in percentage by weight: 0.30-0.35% of C, 18-20% of Cr, 0.35-0.50% of Mn, 1.50-1.70% of Mo, 0.80-1.0% of Si, 0.02% of Ti, 0.06% of V, and the balance of Fe. The method has the manufacturing steps of: firstly, manufacturing the iron-based alloy into powder, wherein the particle size of the iron-based alloy respectively selects two ranges: (1) 50-150 micrometers and (2) 100-325 micrometers; then, smelting by an electric arc furnace or a vacuum electric arc furnace, and manufacturing alloy powder on a horizontal atomizing process producing device protected by full Ar gas or full N2 gas, wherein the powder is in a uniform solid particle shape, and the content of satellite-shaped particles does not exceed 3-5%. The invention provides the iron-based alloy material for laser repair of the rotor main shaft, which has the advantages of quick repair operation, good quality, no damage to the rotor and the shaft diameter, safe and reliable running after the repair, long service life, and the like.

Description

technical field [0001] The invention relates to an iron-based alloy material, in particular to an iron-based alloy material used for laser repair of a rotor spindle and a manufacturing method thereof. Background technique [0002] At present, in the motor, centrifugal compressor, axial flow fan, water pump, steam turbine and other turbine rotating equipment widely used in petrochemical, steel, electric power and other industries, the rotor is the core component common to these equipment. After long-term service under various working conditions, the bearing journal of the rotor main shaft will be worn and ablated; the sealing shaft diameter and thrust will also be corroded, and the wear will fail. The general and conventional method is to manufacture and replace the rotor shaft diameter. The material of the rotor main shaft is made of medium carbon or alloy steel such as 45#, 40Cr, 42CrNiMoA, etc. according to its bearing strength; the manufacturing and replacement of new ro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/08
Inventor 魏振华
Owner 四川新吉隆环保科技有限公司
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