CN109207910A - A kind of method for carburizing based on laser-impact - Google Patents
A kind of method for carburizing based on laser-impact Download PDFInfo
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- CN109207910A CN109207910A CN201811253193.6A CN201811253193A CN109207910A CN 109207910 A CN109207910 A CN 109207910A CN 201811253193 A CN201811253193 A CN 201811253193A CN 109207910 A CN109207910 A CN 109207910A
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- laser
- carburizing
- metal targets
- impact
- carbon dust
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/60—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using solids, e.g. powders, pastes
- C23C8/62—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using solids, e.g. powders, pastes only one element being applied
- C23C8/64—Carburising
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The invention belongs to material surface strengthening processing technology field more particularly to a kind of method for carburizing based on laser-impact.Method for carburizing of the present invention is a kind of laser-impact method for carburizing for assisting fuel factor, Integrative Coating is provided simultaneously with the effect of restraint layer and absorbed layer, carbon dust can be directly by laser induced heat transfer to metal targets surface as absorbed layer, in laser-impact treatment process, after laser beam is applied to metal targets surface, high temperature and pressure plasma is formed in ultra-short Time, plasma generates explosion wave in the confined space and carbon dust is pressed into inside metal targets, form the carburized layer with exact depth, reach carburizing effect, carbon dust is pressed into metal targets the penetration of metal targets using pulse laser induced shock wave by method for carburizing of the present invention, with accurate controllable characteristics, it can be realized the local carburzing of privileged site, and then realize the differential hardening processing of metal targets.
Description
Technical field
The invention belongs to material surface strengthening processing technology field more particularly to a kind of carburizing sides based on laser-impact
Method.
Background technique
Carburizing is one kind of metal material surface intensive treatment mode, usually by the way that workpiece is placed in activated carburizing medium
In, the isothermal holding by certain temperature makes metal material surface form certain carbon profile progress carburizing.With industry
Development, certain specific parts start differential hardening demand occur, but existing method for carburizing is only applicable to the hard of workpiece overall surface
Change processing.
Summary of the invention
The present invention provides a kind of method for carburizing based on laser-impact, are only applicable to work for solving existing method for carburizing
The technical issues of cure process of part overall surface.
Specific technical solution provided by the invention is as follows:
A kind of method for carburizing based on laser-impact, comprising the following steps:
A) carbon dust is coated on restraint layer and obtains Integrative Coating；
B) Integrative Coating, metallic target described in the carbon dust face of the Integrative Coating are coated on metal targets surface
Material surface, then laser-impact processing is carried out, obtain carburized metal material.
Preferably, the restraint layer is K9 glass.
Preferably, the material of the metal targets is selected from mild steel or low-alloy steel.
Preferably, the surface roughness on the metal targets surface is lower than Ra 5.
Preferably, the laser facula of the laser-impact processing is circular light spot, the hot spot overlapping rate of the circular light spot
Greater than 50%.
Preferably, the mode of the laser-impact processing is point-by-point processing.
Preferably, the carbon dust is coated on the restraint layer by adhesive.
Preferably, step b) is described carry out laser-impact processing again after, it is described obtain carburized metal material before, also wrap
It includes:
Remove the Integrative Coating.
Preferably, after the removal Integrative Coating, further includes:
Metal targets after the progress laser-impact processing are post-processed, removing remains in the metal targets
The carbon dust on surface.
Preferably, the post-processing is mechanical polishing.
In conclusion the present invention provides a kind of method for carburizing based on laser-impact, comprising the following steps: a) by carbon dust
Coated on obtaining Integrative Coating on restraint layer；B) Integrative Coating is coated on metal targets surface, the integration applies
Metal targets surface described in the carbon dust face of layer, then laser-impact processing is carried out, obtain carburized metal material.Carburizing side of the present invention
Method is a kind of laser-impact method for carburizing for assisting fuel factor, and Integrative Coating is provided simultaneously with the effect of restraint layer and absorbed layer,
Carbon dust can swash as absorbed layer directly by laser induced heat transfer to metal targets surface, in laser-impact treatment process
After light light beam is applied to metal targets surface, high temperature and pressure plasma is formed in ultra-short Time, plasma is in limited sky
Between generate explosion wave by carbon dust be pressed into metal targets inside, formed have exact depth carburized layer, reach carburizing effect,
Carbon dust is pressed into metallic target the penetration of metal targets using pulse laser induced shock wave by method for carburizing of the present invention
Inside material, there are accurate controllable characteristics, can be realized the local carburzing of privileged site, and then realize the differential hardening of metal targets
Processing.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described.
Fig. 1 is that a kind of structure of the Integrative Coating of the method for carburizing based on laser-impact provided in an embodiment of the present invention is shown
It is intended to；
Fig. 2 is a kind of flow diagram of the method for carburizing based on laser-impact provided in an embodiment of the present invention；
It illustrates: 1. restraint layers；2. carbon dust；3. Integrative Coating；4. laser beam；5. plasma；6. shock wave；
7. carburized layer；8. metal targets.
Specific embodiment
The present invention provides a kind of method for carburizing based on laser-impact, are only applicable to work for solving existing method for carburizing
The technical issues of cure process of part overall surface.
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
A kind of method for carburizing based on laser-impact, comprising the following steps:
A) carbon dust is coated on restraint layer and obtains Integrative Coating；
B) metal targets surface coat Integrative Coating, the carbon dust face metal targets surface of Integrative Coating, then into
The processing of row laser-impact, obtains carburized metal material.
Referring to Fig. 1, being a kind of Integrative Coating of the method for carburizing based on laser-impact provided in an embodiment of the present invention
Structural schematic diagram.
Referring to Fig. 2, being a kind of flow diagram of the method for carburizing based on laser-impact provided in an embodiment of the present invention.
Method for carburizing of the present invention is a kind of laser-impact method for carburizing for assisting fuel factor, and Integrative Coating 3 is provided simultaneously with 1 He of restraint layer
The effective pressure of laser blast wave can be improved in the effect of absorbed layer, restraint layer 1, and carbon dust 2 can directly draw laser as absorbed layer
The heat transfer of hair is to 8 surface of metal targets, in laser-impact treatment process, after laser beam is applied to metal targets surface 8,
High temperature and pressure plasma 5 is formed in ultra-short Time, plasma 5 generates explosion wave in the confined space and presses carbon dust 2
Enter inside metal targets 8, form the carburized layer 7 with exact depth, reach carburizing effect, method for carburizing of the present invention uses pulse
Carbon dust 2 is pressed into metal targets 8 penetration of metal targets 8 by the shock wave of induced with laser, is had precisely controllable
Characteristic can be realized the local carburzing of privileged site, and then realizes and handle the differential hardening of metal targets 8.
In the embodiment of the present invention, laser-impact can be greatly enhanced by strong laser induced shock wave reinforced metal
Laser-impact is used for method for carburizing by the durability of metal targets 8, be can make full use of pulse laser induced shock wave, is made
Inside the indentation to metal targets 8 of carbon dust 2, the local carburzing of privileged site is realized, controllability is strong, and carburizing process cleaning and nothing
Raw material is saved in pollution.
In the embodiment of the present invention, step b) carries out laser-impact processing in 8 surface of metal targets coating Integrative Coating 3 again
Number be more than twice, to enhance carburizing effect.
It should be noted that step b) carries out laser-impact processing in 8 surface of metal targets coating Integrative Coating 3 again
Number can be adjusted according to actual needs.
In the embodiment of the present invention, the depth that laser-impact carries out carburizing can be by the laser arteries and veins during change laser-impact
Width is rushed to be adjusted.Pulse width is bigger, and the depth for carrying out carburizing is deeper.
It should be noted that the thickness of restraint layer 1, carbon dust 2 and Integrative Coating 3 can be adjusted according to actual needs,
It is not specifically limited herein.
In the embodiment of the present invention, restraint layer 1 is K9 glass.
In the embodiment of the present invention, the material of metal targets 8 is selected from mild steel or low-alloy steel.
In the embodiment of the present invention, the surface roughness on 8 surface of metal targets is lower than Ra 5, can guarantee Integrative Coating 3
Uniform fold is carried out, and enables to carburizing better effect, homogeneous carburizing effect is presented.
In the embodiment of the present invention, the laser facula of laser-impact processing is circular light spot, the hot spot overlapping rate of circular light spot
Greater than 50%, it can guarantee carburized zone integrally by the effect of laser blast wave.
In the embodiment of the present invention, the mode of laser-impact processing is point-by-point processing.
In the embodiment of the present invention, when needing to carry out the local carburzing processing of different location, the mode of laser-impact processing is
Point-by-point processing.Point-by-point processing specifically: the mobile progress parts to be processed different location of parts to be processed is carried using mechanical arm
Laser-impact processing, mechanical arm is mobile once to carry out a laser-impact.
In the embodiment of the present invention, carbon dust 2 is coated on restraint layer 1 by adhesive.
Adhesive can be glue, can also use other adhesives as needed.
In the embodiment of the present invention, after step b) carries out laser-impact processing again, before obtaining carburized metal material, also wrap
It includes:
Remove Integrative Coating 3.
In the embodiment of the present invention, after removal Integrative Coating 3, further includes:
Metal targets 8 after progress laser-impact processing are post-processed, removing remains in 8 surface of metal targets
Carbon dust.
In the embodiment of the present invention, post-process as mechanical polishing.
In conclusion the present invention provides a kind of method for carburizing based on laser-impact, comprising the following steps: a) by carbon dust
Coated on obtaining Integrative Coating on restraint layer；B) Integrative Coating, the carbon dust of Integrative Coating are coated on metal targets surface
Face metal targets surface, then laser-impact processing is carried out, obtain carburized metal material.Method for carburizing of the present invention is a kind of auxiliary
The laser-impact method for carburizing of fuel factor, Integrative Coating 3 are provided simultaneously with the effect of restraint layer 1 and absorbed layer, and restraint layer 1 can mention
The effective pressure of high laser blast wave, carbon dust 2 can be directly by laser induced heat transfers to 8 table of metal targets as absorbed layer
Face in laser-impact treatment process, after laser beam is applied to metal targets surface 8, forms high temperature and pressure in ultra-short Time
Plasma 5, plasma 5 generate explosion wave in the confined space and carbon dust 2 are pressed into inside metal targets 8, and formation has
The carburized layer 7 of exact depth reaches carburizing effect, and method for carburizing of the present invention is using pulse laser induced shock wave to metallic target
Carbon dust 2 is pressed into metal targets 8 by the penetration of material 8, is had accurate controllable characteristics, be can be realized the office of privileged site
Portion's carburizing, and then realize and the differential hardening of metal targets 8 is handled.
For a further understanding of the present invention, the present invention will be described in detail combined with specific embodiments below.
Embodiment 1
The present embodiment carries out laser-impact Carburization Treatment to the regional area of Q235A mild steel test block to improve material surface
Mechanical performance.
The specification of object Q235A mild steel test block to be processed is 50mm × 50mm × 50mm, is mentioned using local carburzing method
The mechanical performance of the central area on a certain surface of height carbon steel coupons, the area of the central area are 20mm × 20mm.It adopts first
Q235A mild steel test block is surface-treated with mechanical lapping mode, until the surface roughness value of material surface reaches Ra
4.K9 glass is taken simultaneously, and obtains Integrative Coating in the carbon dust that its surface coating thickness is 0.5mm, and coating procedure is by glue
It is carried out with the mode of mechanical compression.Before laser-impact processing, machine cuts area is slightly larger than the integration of 20mm × 20mm
Apply and be placed on the central area surface of Q235A mild steel test block, and use be no less than 5 layers black belt (overall thickness for
0.5mm) Q235A mild steel test block unlapped to Integrative Coating region is protected.
Then, laser-impact processing is carried out, laser-impact processing uses pulse laser, and laser spot diameter 3mm swashs
Light energy is 6J, and cross/vertical overlapping rate of pulse width 18ns, laser facula are 55%.Laser-impact processing region covers completely
The central area surface of Q235A mild steel test block is covered, area is about 25mm × 25mm.After laser-impact processing, removal Q235A is low
The black belt and Integrative Coating on carbon steel coupons surface, and finishing is carried out to carburized surface using mechanical polishing method.So far,
The region of centre of surface about 20mm × 20mm of Q235A mild steel test block forms the carburized layer of depth 0.5mm, Carburization Treatment and
The shock wave collective effect that laser-impact generates causes the microhardness in target metallized carbon region to improve 20%.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of method for carburizing based on laser-impact, which comprises the following steps:
A) carbon dust is coated on restraint layer and obtains Integrative Coating；
B) Integrative Coating, metal targets table described in the carbon dust face of the Integrative Coating are coated on metal targets surface
Face, then laser-impact processing is carried out, obtain carburized metal material.
2. method for carburizing according to claim 1, which is characterized in that the restraint layer is K9 glass.
3. method for carburizing according to claim 1, which is characterized in that the material of the metal targets is selected from mild steel or low
Steel alloy.
4. method for carburizing according to claim 1, which is characterized in that the surface roughness on the metal targets surface is lower than
Ra 5。
5. method for carburizing according to claim 1, which is characterized in that the laser facula of the laser-impact processing is circle
The hot spot overlapping rate of hot spot, the circular light spot is greater than 50%.
6. method for carburizing according to claim 1, which is characterized in that the mode of the laser-impact processing is point-by-point adds
Work.
7. method for carburizing according to claim 1, which is characterized in that the carbon dust is coated on the constraint by adhesive
On layer.
8. method for carburizing according to claim 1, which is characterized in that carry out laser-impact again described in step b) and handle it
Afterwards, it is described obtain carburized metal material before, further includes:
Remove the Integrative Coating.
9. method for carburizing according to claim 8, which is characterized in that after the removal Integrative Coating, also wrap
It includes:
Metal targets after the progress laser-impact processing are post-processed, removing remains in the metal targets surface
Carbon dust.
10. method for carburizing according to claim 9, which is characterized in that the post-processing is mechanical polishing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811253193.6A CN109207910A (en) | 2018-10-25 | 2018-10-25 | A kind of method for carburizing based on laser-impact |
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| CN201811253193.6A CN109207910A (en) | 2018-10-25 | 2018-10-25 | A kind of method for carburizing based on laser-impact |
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| CN112556512A (en) * | 2020-11-12 | 2021-03-26 | 中国兵器装备研究院 | Manufacturing method of precontrol fragment and precontrol fragment |
| CN112575283A (en) * | 2020-11-12 | 2021-03-30 | 中国兵器装备研究院 | Method for local carburization of a metal workpiece and metal workpiece |
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Application publication date: 20190115 |