Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

High speed rotating machinery axle laser cladding repair alloy powder and repair method

A high-speed rotation and laser cladding technology, applied in laser welding equipment, metal processing equipment, metal material coating technology, etc., can solve the problems of poor wear resistance, easy peeling, large heat input, etc., and achieve good corrosion resistance , Enhanced corrosion resistance, stable operation of the unit

Active Publication Date: 2013-10-16
CHINA HUADIAN ENG +2
View PDF8 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Overlay welding technology, this method has high bonding strength and is not easy to fall off; but there is a big disadvantage: this kind of parts are mostly made of medium carbon alloy steel after heat treatment, quenching and tempering, and the weldability is poor; when using Traditional surfacing technology requires preheating, large heat input, large heat-affected area, and the mechanical properties of the workpiece will be reduced. At the same time, the deformation is large and the deformation is easy to exceed the tolerance. This is not easy for the repair of the continuous high-speed rotating shaft. overcome difficulties
[0006] 3. Brush plating technology, which basically has no deformation; but the bonding force is weak, and the bonding strength generally does not exceed 100MPa. It is only suitable for repairing thin-layer, low-load and slow-speed parts, and it is easier to peel off
[0007] 4. Thermal spray welding, this technology has a high bonding strength, which can reach nearly 300MPa; but it needs to be preheated at 300-400°C, the heat loss is large, and it is easy to deform
In the prior art, there are also many research results of rotor shaft repair using laser cladding technology, such as the "laser cladding repair process for cross shafts" disclosed in the patent application with application number 201210351284.X; the patent application with application number 200410021471.7 The disclosed "a laser repaired generator, steam turbine rotor shaft and its repair method"; the "Laser Repair Method for Centrifugal Fan Bearing Block Wear" disclosed in the patent application with application number 201110004856.2; but the above-mentioned solutions all have the following Disadvantages: The alloy powder used for laser cladding has weak weldability and poor wear resistance. It can only restore the size of the worn part of the mechanical shaft, but it cannot improve the wear resistance of the repaired journal; in addition , when laser cladding is carried out, the cladding quality is average, the penetration degree and bonding force are not enough, the cladding quality is unstable, and the cladding efficiency is also low

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High speed rotating machinery axle laser cladding repair alloy powder and repair method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: A laser cladding repair alloy powder for high-speed rotating mechanical shafts, calculated by weight percentage, prepared from the following raw material powders: C 0.13%, Cr 15%, Si 1.3%, Ni 5%, P 0.025% , Fe 78.545%. The alloy powder is prepared by a gas atomization method.

[0037] A laser cladding repair method for a high-speed rotating mechanical shaft, comprising the following steps (such as figure 1 shown):

[0038] A. Place the high-speed rotating mechanical shaft to be processed on the electric bracket that matches its weight and size;

[0039] B. Use sandpaper or a grinder to smooth the scratches on the journal of the high-speed rotating mechanical shaft; if there are cracks or cracks in the journal, use a portable portable grinder for grinding until there are no cracks or cracks;

[0040] C. Use a rag dipped in alcohol to wipe the journal position clean and use the above-mentioned laser cladding of the high-speed rotating mechanical shaft to rep...

Embodiment 2

[0043] Example 2: A laser cladding repair alloy powder for high-speed rotating mechanical shafts, calculated by weight percentage, prepared from the following raw material powders: C 0.13%, Cr 17%, Si 1.3%, Ni 4%, P 0.02% , Fe 77.55%. The alloy powder is prepared by a gas atomization method.

[0044] A laser cladding repair method for a high-speed rotating mechanical shaft, comprising the following steps (such as figure 1 shown):

[0045] A. Place the high-speed rotating mechanical shaft to be processed on the electric bracket that matches its weight and size;

[0046] B. Use sandpaper or a grinder to smooth the scratches on the journal of the high-speed rotating mechanical shaft; if there are cracks or cracks in the journal, use a portable portable grinder for grinding until there are no cracks or cracks;

[0047] C. Wipe the journal position clean and use the above-mentioned laser cladding of the high-speed rotating mechanical shaft to repair the alloy powder, perform las...

Embodiment 3

[0050] Example 3: A laser cladding repair alloy powder for high-speed rotating mechanical shafts, calculated by weight percentage, prepared from the following raw material powders: C 0.13%, Cr 13%, Si 1.3%, Ni 6%, P 0.01% , Fe 79.56%. The alloy powder is prepared by a gas atomization method.

[0051] A laser cladding repair method for a high-speed rotating mechanical shaft, comprising the following steps (such as figure 1 shown):

[0052] A. Place the high-speed rotating mechanical shaft to be processed on the electric bracket that matches its weight and size;

[0053] B. Use sandpaper or a grinder to smooth the scratches on the journal of the high-speed rotating mechanical shaft; if there are cracks or cracks in the journal, use a portable portable grinder for grinding until there are no cracks or cracks;

[0054] C. For the shaft after the shaft neck has been polished and cleaned, use the above-mentioned laser cladding repair alloy powder of the high-speed rotating mechan...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a high speed rotating machinery axle laser cladding repair alloy powder and a repair method. The alloy powder is prepared with the following components by weight: 0.13 percent of C, 13 percent to 17 percent of Cr, 1.3 percent of Si, 4 percent to 6 percent of Ni, less than 0.03 percent of P, and the balancing percent being Fe. According to the method provided by the invention, alloy powder is obtained by strict screen of raw material and matching thereof, can restore the damage part size of the rotating shaft, and is wearproof, so as to enable the degree of wear proof of shaft neck after being repaired by the alloy powder to surpass the substrate, that is, for the degree of wearproof of the shaft neck, the service life of the repaired rotating shaft surpasses that of a newly produced rotating shaft; furthermore, corrosion resistance of the shaft neck of the repaired alloy powder is greatly increased, so as to enable the rotator shaft to be more wear-resisting in the next period, and the running of the unit to be more stable.

Description

technical field [0001] The invention relates to a laser cladding repair alloy powder for a high-speed rotating mechanical shaft and a repair method, belonging to the field of laser processing. Background technique [0002] In the power industry, motor rotors, steam turbine rotors, turbine rotor shafts, etc. are mostly parts that bear heavy loads and run at high speeds, and are expensive. When the journals of these parts are worn out, what method can be used to maintain them? Intact performance is a long-term research problem for scientific and technical personnel. [0003] Commonly used methods are as follows: [0004] 1. Overlay welding technology, this method has high bonding strength and is not easy to fall off; but there is a big disadvantage: this kind of parts are mostly made of medium carbon alloy steel after heat treatment, quenching and tempering, and the weldability is poor; when using Traditional surfacing technology requires preheating, large heat input, large ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C23C24/10C22C38/40B23K26/34
Inventor 冯小清田为军郭曙祥王康晶崔发生
Owner CHINA HUADIAN ENG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com