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Laser cleaning method for surface of ductile iron

A technology of laser cleaning and ductile iron, which is applied in the field of laser engineering, can solve the problems of ineffective removal and surface damage of cast iron, and achieve the effect of avoiding damage and improving cleaning efficiency

Active Publication Date: 2021-02-05
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the stable performance of graphite, the current cleaning methods such as pickling and alkali cleaning cannot be effectively removed, and it is easy to cause certain damage to the cast iron surface

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take a piece of ductile iron sample of any shape, and use the following process to clean it:

[0025] The light source of the laser cleaning machine is selected as an LD pumped solid-state laser, and the output wavelength is 1064nm;

[0026] Adjust the average output power of the laser cleaning machine to 180W;

[0027] Adjust the repetition frequency of the laser cleaning machine to 8kHz;

[0028] Adjust the pulse width of the output laser of the laser cleaning machine to 60ns;

[0029] Adjust the spot size of the output laser of the laser cleaning machine to act on the surface of the cleaning object to be 0.5mm;

[0030] Adjust the output line spot of the laser cleaning machine;

[0031] Use a linear spot to scan the surface of the ductile iron at a scanning rate of 3cm / s. Under the action of the scanning laser, the graphite particles on the surface of the cast iron are detached from the cast iron;

[0032] The ductile iron is cleaned twice by the above method, an...

Embodiment 2

[0035] Take a piece of ductile iron sample of any shape, and use the following process to clean it:

[0036] The light source of the laser cleaning machine is selected as an LD pumped solid-state laser, and the output wavelength is 1064nm;

[0037] Adjust the average output power of the laser cleaning machine to 220W;

[0038] Adjust the repetition frequency of the laser cleaning machine to 12kHz;

[0039] Adjust the pulse width of the output laser of the laser cleaning machine to 100ns;

[0040] Adjust the spot size of the output laser of the laser cleaning machine to act on the surface of the cleaning object to be 1mm;

[0041] Adjust the output line spot of the laser cleaning machine;

[0042] Use a linear spot to scan the surface of the ductile iron at a scanning rate of 4cm / s. Under the action of the scanning laser, the graphite particles on the surface of the cast iron are separated from the cast iron;

[0043] The ductile iron is cleaned twice by the above method, a...

Embodiment 3

[0046] Take a piece of ductile iron sample of any shape, and use the following process to clean it:

[0047] The light source of the laser cleaning machine is selected as an LD pumped solid-state laser, and the output wavelength is 1064nm;

[0048] Adjust the average output power of the laser cleaning machine to 200W;

[0049] Adjust the repetition frequency of the laser cleaning machine to 10kHz;

[0050] Adjust the pulse width of the output laser of the laser cleaning machine to 80ns;

[0051] Adjust the spot size of the output laser of the laser cleaning machine to act on the surface of the cleaning object to be 0.5mm;

[0052] Adjust the output line spot of the laser cleaning machine;

[0053] By manually turning the ductile iron, the line spot output by the laser cleaning machine can just act on the surface of the ductile iron that needs to be cleaned.

[0054] Use a linear spot to scan the surface of the ductile iron at a scanning rate of 3cm / s. Under the action of t...

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Abstract

The invention discloses a laser cleaning method for the surface of ductile iron, which adjusts the average output power, repetition frequency, output laser pulse width, output spot size and scanning speed of the laser cleaning machine, and adjusts the action of the spot on the surface of the ductile iron to realize scanning Laser can effectively remove graphite particles on the surface of ductile iron, improve cleaning efficiency, and ensure that while removing graphite particles on the surface of ductile iron, it can effectively avoid damage to the matrix of ductile iron.

Description

technical field [0001] The invention relates to the field of laser engineering, in particular to a method for laser cleaning the surface of ductile iron. Background technique [0002] Cast iron, especially ductile iron, has developed into an irreplaceable metal material for casting mechanical parts with complex stress and high requirements, and is widely used in many important engineering components. At present, it is used in various fields of the national economy, such as automobiles, engines, construction machinery, agricultural machinery, cast pipes and pipe fittings, and machine tools. The carbon element in the ductile iron is distributed in the cast iron in the state of spherical graphite, and the surface of the cast iron is that the spherical graphite is embedded in the cast iron. In engineering, engineering components often need to be welded, and spherical graphite embedded in cast iron has a great influence on welding performance. Due to the stable performance of g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B08B7/00
Inventor 贾宝申唐洪平廖威张丽娟
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS