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Laser Strengthening Process of Vacuum Pump Compressor Blades

A compressor blade, laser strengthening technology, applied in the field of laser processing, can solve the problems of poor strengthening effect, consumables, large deformation, etc., and achieve the effect of avoiding water erosion, preventing fracture, and preventing differences in gasification

Active Publication Date: 2018-09-07
HANGZHOU SIXIN IND PUMP MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the shortcomings of time-consuming, consumable materials, large deformation and poor strengthening effect in the prior art, the present invention provides a laser strengthening process for vacuum pump compressor blades

Method used

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  • Laser Strengthening Process of Vacuum Pump Compressor Blades

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The laser strengthening process of vacuum pump compressor blades, the specific steps are as follows:

[0027] 1) Clean the blade surface with clean water;

[0028] 2) Apply the first absorbent coating evenly on the blade;

[0029] 3) Spray the second absorbent coating on the outside of the first absorbent coating with a spray gun. The side of the blade close to the compressor shaft is the inner side of the blade, and the side of the blade away from the compressor shaft is the outer side of the blade. The second absorbent coating consists of multiple Composed of arcs extending from the inside of the blade to the outside of the blade, the width of the arc is 4mm, and the interval between each arc is 7.5mm;

[0030] 4) apply the constraining layer outside the blade;

[0031] 5) Fix the laser by the fixture;

[0032] 6) Adjust the angle of laser shock strengthening: adjust the angle between the laser light path and the surface of the blade to 20°-85° through the fixture....

Embodiment 2

[0043] Same as Example 1, except that only the first absorber coating is sprayed.

[0044] Table 1 Example 1, Example 2 and the blade fatigue strength parameter table without laser shock

[0045] test group

Embodiment 3

[0047] Same as Example 1, the difference is that the common thickness (b) formed by the second absorbent coating and the first absorbent coating is 0.59 mm.

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Abstract

The invention relates to the field of laser machining and discloses a laser strengthening process of a blade of a vacuum pump compressor. The laser strengthening process comprises the specific steps: cleaning the surface of the blade with cleaning water; uniformly spraying a first absorption coating on the blade; spraying a second absorption coating outside the first absorption coating through a spraying gun; spraying a constraining layer outside the blade; aligning a laser device with the blade and carrying out laser impact strengthening in a direction from the inner side of the blade to the outer side of the blade. According to the laser strengthening process, the second absorption coating is arranged so that the blade has relatively strong hardness in the direction from the inner side of the blade to the outer side of the blade, and furthermore, a condition that the blade is broken in a working process is effectively prevented; meanwhile, water erosion on the surface of the blade is avoided; gasification difference between the absorption coatings with different thicknesses is effectively prevented through an auxiliary heating manner; an operation process is simplified and the efficiency of laser impact hardening is improved.

Description

technical field [0001] The invention relates to the field of laser processing, in particular to a laser strengthening process for vacuum pump compressor blades. Background technique [0002] The linear velocity of the blade tip of the vacuum pump compressor blade air inlet can be as high as 150m / s. Due to the high humidity of the intake parameters, even small droplets will appear in extreme cases, and water erosion problems will occur to varying degrees. Therefore, a vacuum pump is proposed. It is very necessary to improve the local water erosion of the impeller blades by laser local strengthening method of compressor impeller. For precipitation hardened stainless steel blades, it is difficult to increase the hardness and strength of the blades by quenching. At present, the overall solution aging treatment is adopted, but this method requires overall heating, which has the disadvantages of time-consuming, consumable materials, large deformation, and poor strengthening effec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D10/00
CPCC21D10/005
Inventor 陈刚
Owner HANGZHOU SIXIN IND PUMP MFG
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