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Laser repairing method for propeller shaft

A laser repair and propeller technology, applied in the direction of coating, metal material coating process, etc., can solve the problems of changing the body tissue performance, straining the power system, and high replacement costs, achieving controllable dilution, strong metallurgical bonding, thermal Small area of ​​influence

Pending Publication Date: 2021-06-18
DANYANG HONGTU LASER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wear and tear of the propeller shaft will have an impact on the normal operation of the entire power system of the ship. If you accidentally break down "in the middle" it will have a very big impact
Due to the influence of long production cycle and high replacement cost, repair is the main method after damage to the paddle shaft
Due to the excessive heat input, the pulp shaft will be deformed and the tissue performance of the body will be changed by using the ordinary repair process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A laser repair method for a propeller shaft, comprising the steps of:

[0018] A. Clean and measure the size of the propeller shaft, determine the worn part of the propeller shaft and the amount of wear; according to the test results, remove the wear fatigue layer and corrosion fatigue layer of the worn part of the propeller shaft; and test the hardness of the unworn part;

[0019] B. Use PT flaw detection to inspect the worn parts where the wear fatigue layer and corrosion fatigue layer have been removed to ensure that there are no surface defects and internal defects in the worn parts;

[0020] C. Mix the alloy powder prepared in proportion, and add the mixed alloy powder to the powder delivery system; the composition and weight percentage of the alloy powder used are C: 0.010%, Cr: 20%, Si: 0.6 %, Mo: 3%, Mn: 1%, Ni: 13%, and the rest is Fe; a stable and reliable powder delivery system is an important guarantee for the repair quality of metal parts, and the fluctuati...

Embodiment 2

[0025] A laser repair method for a propeller shaft, comprising the steps of:

[0026] A. Clean and measure the size of the propeller shaft, determine the worn part of the propeller shaft and the amount of wear; according to the test results, remove the wear fatigue layer and corrosion fatigue layer of the worn part of the propeller shaft; and test the hardness of the unworn part;

[0027] B. Use PT flaw detection to inspect the worn parts where the wear fatigue layer and corrosion fatigue layer have been removed to ensure that there are no surface defects and internal defects in the worn parts;

[0028] C. Mix the alloy powder prepared in proportion, and add the mixed alloy powder to the powder delivery system; the composition and weight percentage of the alloy powder used are C: 0.012%, Cr: 18%, Si: 0.4 %, Mo: 2.5%, Mn: 0.7%, Ni: 11.5%, and the rest is Fe;

[0029] D. Fix the propeller shaft on the machine tool, use the KUKA robot to cooperate with the fiber laser for contin...

Embodiment 3

[0033] A laser repair method for a propeller shaft, comprising the steps of:

[0034] A. Clean and measure the size of the propeller shaft, determine the worn part of the propeller shaft and the amount of wear; according to the test results, remove the wear fatigue layer and corrosion fatigue layer of the worn part of the propeller shaft; and test the hardness of the unworn part;

[0035] B. Use PT flaw detection to inspect the worn parts where the wear fatigue layer and corrosion fatigue layer have been removed to ensure that there are no surface defects and internal defects in the worn parts;

[0036] C. Mix the alloy powder prepared in proportion, and add the mixed alloy powder to the powder delivery system; the composition and weight percentage of the alloy powder used are C: 0.018%, Cr: 15%, Si: 0.3 %, Mo: 2.5%, Mn: 0.8%, Ni: 10.5%, and the rest is Fe;

[0037] D. Fix the propeller shaft on the machine tool, use the KUKA robot to cooperate with the fiber laser for contin...

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PUM

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Abstract

The invention relates to a laser repairing method for a propeller shaft. According to the method, the propeller shaft is repaired through laser cladding, specifically, heating is conducted on a metal surface by means of a high-energy laser beam, a substrate surface and added alloy powder are quickly heated and melted under the heat action to form a metallurgical bonding surface cladding layer with an extremely low dilution rate, the propeller shaft is repaired by means of a laser cladding technology, more excellent abrasion resistance and corrosion resistance are achieved, deformation of the propeller shaft can be avoided due to quick heating and quick cooling of laser, low heat input, a small heat affected zone and low distortion, the dilution rate of the cladding layer is smaller than 5%, the cladding layer is in firm metallurgical bonding with a substrate, and the good cladding layer with controllable cladding layer components and dilution can be obtained.

Description

technical field [0001] The invention relates to the technical field of laser welding technology, in particular to a laser repair method for a propeller shaft. Background technique [0002] Ships encounter resistance when sailing on the water surface or in water, and its size is related to the size, shape and sailing speed of the ship. In order to keep the ship sailing forward at a certain speed, it is necessary to provide the ship with a thrust greater than the resistance to generate power. The propeller Thus was born. As the core mechanism of the ship, the propeller has very high requirements for size and assembly accuracy, and has high requirements for the structure and mechanical properties of the material of each component body. As a key component of ship power output and propeller power transmission, the propeller shaft plays a key role in the forward motion of the ship. The wear and tear of the propeller shaft will have an impact on the normal operation of the entire...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C38/02C22C38/04C22C38/44
CPCC23C24/103C22C38/02C22C38/04C22C38/44
Inventor 何建方刘少彬马万花
Owner DANYANG HONGTU LASER TECH
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