CN104399968B - A kind of cobalt-based metal alloy powder for continuous way optical-fiber laser surface alloying - Google Patents
A kind of cobalt-based metal alloy powder for continuous way optical-fiber laser surface alloying Download PDFInfo
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- CN104399968B CN104399968B CN201410629823.0A CN201410629823A CN104399968B CN 104399968 B CN104399968 B CN 104399968B CN 201410629823 A CN201410629823 A CN 201410629823A CN 104399968 B CN104399968 B CN 104399968B
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Abstract
A kind of cobalt-based metal alloy powder for continuous way optical-fiber laser surface alloying, belongs to a kind of alloy powder.By weight percentage, containing 20 25% titanium dioxide, 3 6% cerium oxide, 8 12% aluminium oxidies, 1 4% silicon, 5 8% bismuths, surplus is cobalt and inevitable impurity to this alloy powder.This cobalt-based metal alloy powder, is exclusively used in the surface alloying process of high energy jointed fiber laser instrument, and the alloying layer structures of formation is fine and close, the defect such as pore-free, crackle, shrinkage cavity, and has the metallography performance that high rigidity, highly corrosion resistant etc. are excellent.Solving the laser induced plasma flow field (30 40%) on the low side that existing continuous way laser surface alloying technique exists, easily there is the defect such as crackle, pore in surface alloying layer, and its metallicity can not meet technique and produces the problem needed.
Description
Technical field
The present invention relates to a kind of alloy powder, particularly relate to a kind of cobalt-based metal for continuous way optical-fiber laser surface alloying
Alloy powder.
Background technology
Laser surface alloying is the new method that a kind of metal material surface partial modification processes, and its principle is at high energy laser beam
Irradiation under, parent metal material surface melts with alloying element or the compound of interpolation simultaneously, mixing, in the expansion of liquidized layer
Under the influence of dissipating the physical phenomenons such as effect and surface tension effect, melting zone is formed within a very short time has the requirement degree of depth
(10～1000 μm) and the surface alloying layer of chemical composition.Laser alloying coating with regard to its integrity and with parent metal
Its particularity is had for bond strength.Metallurgical binding purely can be formed between alloying layer and matrix, hereby it is ensured that
Extremely strong adhesion.Impact on matrix is the least, owing to heat effect also only occurs in the range of 1～2mm, therefore,
Workpiece will not occur the biggest deformation.The technical process of laser surface alloying is simple, efficiency is high, and material surface can be made to obtain
Obtain the superior function of various alloy materials, save the rarest and valuable element.
During laser surface alloying, the selection of alloying powder is a very important link.Except to be reached institute
Outside the material property such as alloy-layer hardness of needs, wearability, corrosion resistance, antioxygenic property etc., it is necessary to consider to make at laser
With the interaction of lower alloying material Yu parent metal melt, i.e. they dissolve formed probabilities of compound, wellability,
Linear expansion coefficient and specific volume etc., to ensure satisfied alloying effect.
The weak point that existing continuous way laser surface alloying technique exists is: laser induced plasma flow field is on the low side (30-40%),
Easily there is the defect such as crackle, pore in surface alloying layer, and its metallicity can not meet the needs that technique produces.
Summary of the invention
The invention aims to provide a kind of cobalt-based metal alloy powder for continuous way optical-fiber laser surface alloying, solve
The laser induced plasma flow field (30-40%) on the low side that certainly existing continuous way laser surface alloying technique exists, surface alloying layer holds
The defect such as crackle, pore easily occurs, and its metallicity can not meet technique and produces the problem needed.
The technical scheme realizing the object of the invention is: a kind of Co-based alloy powder for jointed fiber laser alloying, by weight
Amount percentages, containing 20-25% titanium dioxide, 3-6% cerium oxide, 8-12% aluminium oxide, 1-4% silicon, 5-8% bismuth,
Surplus is cobalt；Proportion sample, after pulverizing, is configured to the cobalt-based metal alloy powder of 200-300 mesh.
The preferred weight percent of described Co-based alloy powder is: 23% titanium dioxide, 3% cerium oxide, 11% aluminium oxide, 4%
Silicon, 7% bismuth, surplus is cobalt.
Beneficial effect: cobalt-based metal alloy powder of the present invention, in continuous way optical-fiber laser alloying process, to even
Continuous optical-fiber laser has higher absorbance；Form the dense structure of alloying layer, flawless, shrinkage cavity and porosity, pore etc.
Defect, and there is the metallography performance that high rigidity, highly corrosion resistant etc. are excellent；Without heat treatment process before and after alloying, work
Sequence is easy, environmental protection.The laser induced plasma flow field solving the existence of existing continuous way laser surface alloying technique is on the low side
(30-40%), easily there is the defect such as crackle, pore in surface alloying layer, and its metallicity can not meet technique and produces
The problem needed.
Detailed description of the invention
Below by specific embodiment, the present invention is described in further detail:
The Co-based alloy powder for jointed fiber laser alloying of the present invention, by weight percentage, containing 20-25%
Titanium dioxide, 3-6% cerium oxide, 8-12% aluminium oxide, 1-4% silicon, 5-8% bismuth, surplus is cobalt.
Preferred weight proportioning is: 23% titanium dioxide, 3% cerium oxide, 11% aluminium oxide, 4% silicon, 7% bismuth, and surplus is
Cobalt.
In cobalt-based metal alloy powder of the present invention, the effect of each composition is as follows:
Cobalt (Co) element: as the aggregate of alloy powder, thoroughly melt when alloying, with the metal base of molten condition
Together form laser molten pool, after being uniformly distributed in molten bath for other elements or compound, be frozen into alloying layer.
Titanium dioxide (TiO2): it is a kind of metal oxide materials with good thermal stability and chemical stability, available
Filler in photocatalyst, photoelectric material, catalyst carrier, composite or inert component etc.；Be conducive to improving this
The cobalt-based metal alloy powder of the invention absorbance to laser.
Cerium oxide (CeO2): this interpolation material have uniqueness reproducibility and transitivity, and have good rub resistance and
The lowest chemical corrosivity, has good polishing effect to surface, is also advantageous for improving alloy powder and swashs continuous way optical fiber
The assimilation effect of light.
Aluminium oxide (Al2O3): there is preferable mechanical strength and heat stability, lower-price characteristic；Linear expansion coefficient is relatively
Low, it is possible to decrease the coefficient of thermal expansion of alloy powder and the cracking sensitivity of surface alloying layer；Alloy powder can be strengthened to continuous way
The assimilation effect of optical-fiber laser, such that it is able to reduce the power output of laser instrument, improves the utilization rate of the energy.
Bismuth (Bi) element: belong to low melting material, can be used for reducing the fusing point of alloy powder, reduces energy expenditure.
Silicon (Si) element: play the effect of deoxidation voluntarily and slag making in alloy powder, can be excellent with the oxygen element entering molten bath
It is initially formed silicate, is covered in weld pool surface, prevent liquid metal over oxidation；Low-alloyed fusing point can also be dropped, improve molten
The body wettability to parent metal, mobility and surface tension to alloy produce favorable influence；Be conducive to improving surface
The hardness of alloying layer and wear resistance.
Embodiment 1: will be 20% titanium dioxide by weight percentage, 3% cerium oxide, 8% aluminium oxide, 1% silicon, 5% bismuth,
Surplus is that after the ratio of cobalt weighs 500g sample, size-reduced, sample preparation, preparation obtains the cobalt-based metal alloy of 200-300 mesh
Powder.
Embodiment 2: will be 25% titanium dioxide by weight percentage, 6% cerium oxide, 12% aluminium oxide, 4% silicon, 8%
Bismuth, surplus is that after the ratio of cobalt weighs 500g sample, size-reduced, sample preparation, preparation obtains the cobalt-based metal of 200-300 mesh
Alloy powder.
Embodiment 3: will be 23% titanium dioxide by weight percentage, 3% cerium oxide, 11% aluminium oxide, 4% silicon, 7%
Bismuth, surplus is that after the ratio of cobalt weighs 500g alloy sample, size-reduced, sample preparation, preparation obtains the cobalt-based of 200-300 mesh
Metal alloy powders.
The cobalt-based metal alloy powder obtained is prepared, in 1600W jointed fiber laser power, spot size by embodiment 3
10mm2, under the process conditions such as scanning speed 22mm/s, powder feeding rate 25g/min, to the workpiece table that base material is No. 45 steel
Face carries out Laser Alloying Treatment, and testing result is as shown in the table:
Claims (2)
1., for a cobalt-based metal alloy powder for continuous way laser surface alloying, it is characterized in that: by weight percentage, containing 20-25% titanium dioxide, 3-6% cerium oxide, 8-12% aluminium oxide, 1-4% silicon, 5-8% bismuth, surplus is cobalt to this alloy powder；Proportion sample, after pulverizing, is configured to the cobalt-based metal alloy powder of 200-300 mesh.
Cobalt-based metal alloy powder for continuous way laser surface alloying the most according to claim 1, is characterized in that: preferred weight percent is: 23% titanium dioxide, 3% cerium oxide, 11% aluminium oxide, 4% silicon, 7% bismuth, and surplus is cobalt.
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| EP0213498A2 (en) * | 1985-08-13 | 1987-03-11 | Toyota Jidosha Kabushiki Kaisha | Method for forming alloy layer upon aluminum alloy substrate by irradiating with a CO2 laser, on substrate surface, alloy powder containing substance for alloying and titanium or manganese |
| CN1524649A (en) * | 2003-02-25 | 2004-09-01 | ���µ繤��ʽ���� | Metal powder composition for use in selective laser sintering |
| CN103602858A (en) * | 2013-11-20 | 2014-02-26 | 张翀昊 | Special cobalt base metal ceramic alloy powder for continuous fiber laser cladding |
| CN103602979A (en) * | 2013-11-20 | 2014-02-26 | 浦晓峰 | Special metal ceramic alloy powder for continuous wave fiber laser cladding |
| CN103602857A (en) * | 2013-11-20 | 2014-02-26 | 牛志宇 | Special alloy powder for continuous wave fiber laser cladding |
| CN103611927A (en) * | 2013-11-20 | 2014-03-05 | 柳岸敏 | Cobalt-based metallic ceramic alloy powder special for continuous wave fiber laser cladding |
| CN103667798A (en) * | 2013-11-20 | 2014-03-26 | 柳岸敏 | Special nickel-based metal ceramic alloy powder for continuous-wave optical fiber laser fusion covering |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006257463A (en) * | 2005-03-15 | 2006-09-28 | Sony Corp | Powdery material to be sintered by laser, manufacturing method therefor, three-dimensional structure and manufacturing method therefor |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0213498A2 (en) * | 1985-08-13 | 1987-03-11 | Toyota Jidosha Kabushiki Kaisha | Method for forming alloy layer upon aluminum alloy substrate by irradiating with a CO2 laser, on substrate surface, alloy powder containing substance for alloying and titanium or manganese |
| CN1524649A (en) * | 2003-02-25 | 2004-09-01 | ���µ繤��ʽ���� | Metal powder composition for use in selective laser sintering |
| CN103602858A (en) * | 2013-11-20 | 2014-02-26 | 张翀昊 | Special cobalt base metal ceramic alloy powder for continuous fiber laser cladding |
| CN103602979A (en) * | 2013-11-20 | 2014-02-26 | 浦晓峰 | Special metal ceramic alloy powder for continuous wave fiber laser cladding |
| CN103602857A (en) * | 2013-11-20 | 2014-02-26 | 牛志宇 | Special alloy powder for continuous wave fiber laser cladding |
| CN103611927A (en) * | 2013-11-20 | 2014-03-05 | 柳岸敏 | Cobalt-based metallic ceramic alloy powder special for continuous wave fiber laser cladding |
| CN103667798A (en) * | 2013-11-20 | 2014-03-26 | 柳岸敏 | Special nickel-based metal ceramic alloy powder for continuous-wave optical fiber laser fusion covering |
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