Embossed laser beam implementation method and device for reducing cracks on cladding layer

A technology of laser beam and implementation method, applied in optics, coatings, optical components, etc., can solve the problems of poor versatility, increased complexity of laser cladding system, low control accuracy, etc., to reduce temperature gradient and reduce cracking tendency , the effect of small thermal stress

Inactive Publication Date: 2013-09-18
TONGLING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the special insulation box should be specially designed and manufactured according to different cladding samples, which has poor versatility; and remote sensi

Method used

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  • Embossed laser beam implementation method and device for reducing cracks on cladding layer
  • Embossed laser beam implementation method and device for reducing cracks on cladding layer

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] Example one:

[0032] NiCr-50%Cr is prepared on the surface of TC4 titanium alloy (Ti-6Al-4V) with a convex laser beam that can reduce cracks in the cladding layer 3 C 2 Coating, the specific steps are:

[0033] ① Wire EDM to a certain size of TC4 titanium alloy substrate surface for polishing, degreasing and sandblasting;

[0034] ② Use the research body to mix NiCr and Cr with a ratio (mass fraction) of 1:1 3 C 2 Grind and mix the powder, adjust the mixed powder into a paste with the binder cellulose ether, and evenly coat it on the surface of the TC4 titanium alloy sample to be cladding, the thickness of the preset coating is about 1.5mm;

[0035] ③The laser beam splitter 2 with a fixed splitting ratio is used to divide the laser beam emitted by the laser 1 into two laser beams L 1 , L 2 , Laser beam L 1 , L 2 They are reflected by the laser total mirrors 3 and 4 to the flat-top laser beam shaping elements 5 and 6 respectively to complete the transformation of the laser power...

Example Embodiment

[0037] Embodiment two:

[0038] The NiCr-50%WC coating is prepared on the surface of the TiAl alloy substrate with a convex laser beam that can reduce cracks in the cladding layer. The specific steps are:

[0039] ① Wire EDM to a certain size TiAl alloy substrate surface for polishing, degreasing and sandblasting;

[0040] ② Grind and mix NiCr and WC powders with a ratio (mass fraction) of 1:1 with a grinding body. Use the binder cellulose ether to adjust the mixed powder into a paste, and evenly coat it on the surface of the TiAl alloy sample to be cladding , The thickness of the preset coating is about 1.5mm;

[0041] ③The laser beam splitter 2 with a fixed splitting ratio is used to divide the laser beam emitted by the laser 1 into two laser beams L 1 , L 2 , Laser beam L 1 , L 2 They are reflected by the laser total mirrors 3 and 4 to the flat-top laser beam shaping elements 5 and 6 respectively to complete the transformation of the laser power density, and transform it into two u...

Example Embodiment

[0043] Embodiment three:

[0044] MCrAlY-5%Al is prepared on the surface of GH4033 nickel-based superalloy substrate with a convex laser beam that can reduce cracks in the cladding layer 2 O 3 For composite coating, the specific steps are:

[0045] ① Wire EDM to a certain size of GH4033 nickel-based superalloy substrate surface for polishing, degreasing and sandblasting;

[0046] ②Use the research body to mix MCrAlY and Al with a ratio (mass fraction) of 19:1 2 O 3 Grind and mix the powder, use the binder cellulose ether to adjust the mixed powder into a paste, and evenly coat it on the surface of the GH4033 nickel-based superalloy sample to be cladding. The thickness of the preset coating is about 1.5mm;

[0047] ③The laser beam splitter 2 with a fixed splitting ratio is used to divide the laser beam emitted by the laser 1 into two laser beams L 1 , L 2 , Laser beam L 1 , L 2 They are reflected by the laser total mirrors 3 and 4 to the flat-top laser beam shaping elements 5 and 6 resp...

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Abstract

The invention provides an embossed laser beam implementation method for reducing cracks on a cladding layer. The embossed laser beam implementation method comprises the following steps of: 1, dividing a laser beam L emitted by a laser device into two laser beams L1 and L2 by a laser beam splitter; 2, reflecting the laser beams L1 and L2 to a laser beam shaping element respectively through laser full reflectors to finish light intensity distribution conversion; and 3, combining the two converted light beams by a laser beam combiner to obtain a required embossed light beam in laser power density distribution, and applying the light beam to the surface of a pretreated cladding test piece so as to realize cladding process. The invention also provides an embossed laser beam implementation device for reducing the cracks on the cladding layer. The embossed laser beam implementation method and device for reducing cracks on the cladding layer have the technical effects that the size and the power density distribution of the finally output embossed laser beam can be conveniently controlled; the laser cladding is executed by the embossed light beam, so that preheating and slow cooling effects can be achieved; the cracking tendency of the cladding layer can be effectively reduced.

Description

Technical field: [0001] The present invention relates to a laser beam conversion method and device, in particular to a method and device for controlling cracks in laser cladding layers by changing the distribution of laser power density, in particular to a convex laser beam that reduces cracks in cladding layers Implementation methods and devices. Background technique: [0002] Laser cladding is an important material surface strengthening and processing technology, which uses high power density laser beams (10 4 ~10 6 W / cm 2 ) is irradiated on the metal surface, through rapid melting, expansion and rapid solidification (cooling rate usually reaches 10 2 ~10 6 ℃ / s), forming a metallurgically bonded material with special physical, chemical or mechanical properties on the surface of the base material, thereby significantly improving the wear resistance, corrosion resistance, heat resistance, and oxidation resistance of the base surface. It has broad application prospects i...

Claims

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Application Information

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IPC IPC(8): C23C24/10G02B27/10
Inventor 王东生田宗军杨友文周杏花沈理达黄因慧
Owner TONGLING UNIV
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