CN103537662A - Cobalt-based metal ceramic alloy powder special for laser cladding of milling cutter - Google Patents
Cobalt-based metal ceramic alloy powder special for laser cladding of milling cutter Download PDFInfo
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- CN103537662A CN103537662A CN201310241635.6A CN201310241635A CN103537662A CN 103537662 A CN103537662 A CN 103537662A CN 201310241635 A CN201310241635 A CN 201310241635A CN 103537662 A CN103537662 A CN 103537662A
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- milling cutter
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Abstract
The invention discloses cobalt-based metal ceramic alloy powder special for laser cladding of a milling cutter. The powder comprises, by weight, 13-15% of tungsten carbide, 0.1-0.4% of carbon, 2-6% of calcium fluoride, 4-6% of silicon nitride, 4-6% of boron, 1.3-1.6% of vanadium, 1.1-1.4% of silicon, 6-8% of Fe, 11-14% of molybdenum, and the balance cobalt. The cobalt-based metal ceramic alloy powder is specially used for laser cladding of the milling cutter, and capable of improving the compactness of the metal structure of the milling cutter, reducing the defects of air holes, cracks and shrinkage cavities of a cladding layer, improving the wear resistance, rigidity heat resistance and strength of the milling cutter, and reducing cost.
Description
Technical field
The present invention relates to a kind of alloy powder, refer to especially a kind of cobalt-based cermet powder that is exclusively used in milling cutter laser melting coating.
Background technology
Laser has high brightness, high directivity, high monochromaticity, high coherence's feature, just by increasing field, is used now, and laser melting coating is exactly a kind of in process for treating surface.That summarizes says, the principle of laser melting coating utilizes high energy laser beam to irradiate metal material surface exactly, substrate surface is melted rapidly, liquid metal forms a small-scale molten bath, fill in new dusty material simultaneously, in this molten bath, metal material originally mixes mutually with the powder being added, and forms the new liquid-metal layer of one deck.Treat laser beam through after, liquid-metal layer is the cooling solid-state cladding layer of one deck that forms in metal surface thus rapidly.Milling cutter, for Milling Process, have the rotary cutter of one or more cutters tooth.During work, each cutter tooth cuts the surplus of workpiece successively off and on.Milling cutter is mainly used in processing plane, step, groove, profiled surface and cut-out workpiece etc. on milling machine.Milling cutter requires as follows to the mechanical performance of material: the wearability that 1) high rigidity is become reconciled: 2) good heat resistance: 3) high strength.In the whole material of milling cutter, be so to adopt the high carbide alloy of mechanical performance to make at present, cost is very high, if the metal alloy powders that is specifically designed to milling cutter laser melting coating can be provided, can utilize so laser melting coating when milling cutter mechanical performance is provided, also can reduce the cost of milling cutter.
Summary of the invention
Technical problem to be solved by this invention is: a kind of cobalt-based cermet powder that is exclusively used in milling cutter laser melting coating is provided, this cobalt-based cermet powder is exclusively used in the laser melting coating of milling cutter, improve milling cutter metal structure compactness, reduce pore, crackle and the shrinkage cavity defect of cladding layer, improving blades wear, hardness, in the time of heat resistance, intensity, has reduced cost.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of cobalt-based cermet powder that is exclusively used in milling cutter laser melting coating, by weight percentage, comprise 13-15% tungsten carbide, 0.1-0.4% carbon, 2-6% calcirm-fluoride, 4-6% silicon nitride, 4-6% boron, 1.3-1.6% vanadium, 1.1-1.4% silicon, 6-8% iron, 11-14% molybdenum, surplus is cobalt.
Wherein, the cobalt-based cermet powder optimum ratio that is exclusively used in milling cutter laser melting coating comprises 14% tungsten carbide, 0.3% carbon, and 4% calcirm-fluoride, 5% silicon nitride, 5% boron, 1.5% vanadium, 1.2% silicon, 7% iron, 13% molybdenum, surplus is cobalt.
In cobalt-based cermet powder in the present invention, the effect of each composition is as follows:
Cobalt (Co): as cermet substrate, thorough melting during cladding, together forms laser molten pool with the milling cutter surface substrate of molten condition is uniformly distributed after coagulation for other elements or compound and becomes cladding layer, to increase cladding layer hardness in molten bath.
Tungsten carbide (WC) particle: do not melt in laser cladding process, when to milling cutter laser melting coating, cobalt-based cermet powder evenly sprays from the powder injection hole of laser head, WC is evenly distributed in molten bath, as strengthening particulate, be present in cladding layer, greatly strengthen hardness and the intensity of cladding layer, can reduce the sensitiveness of cladding layer cracking.
Carbon (C): belong to nonmetalloid, carbon content is higher, hardness is just higher, anti-wear performance is just better, yield point and tensile strength raise, but its toughness, plasticity, impact and corrosion resistance can reduce along with the increase of carbon content, so when in this cermet powder, the selection of C content guarantees that milling cutter meets wearability, take into account as much as possible toughness and corrosion resistance, this C content can increase cold brittleness and the aging sensitivity of steel in addition.
Calcirm-fluoride (CaF
2): as adding material,, there is the defects such as fire check, shrinkage cavity and porosity after preventing from solidifying in the internal stress while solidifying for reducing cladding layer, improves the compactness of metal inside tissue.
Silicon nitride (SiN4): exist as the second ceramic particle except tungsten carbide wc, in cladding process, do not melt, but the thermal absorptivity to laser is large, can accelerate heat dispersing, and as the mitigation of soft metallic element and ultrahigh hardness ceramic particle, strengthen creep resistance, non-oxidizability, improve corrosion resistance, and can control the mixability of powder and milling cutter base material.
Boron (B): have intercrystalline strengthening effect, can improve the hardness of cladding layer, intensity, can improve the quenching degree of steel, the normalizing state tissue that impels steel by pearlite to bainite transformation.
Vanadium (V): there is refined crystalline strengthening effect, can improve the quenching degree of resistance to tempering and material, also can form carbide with carbon, can improve heat resistance.
Silicon (Si): rise in Self-fusing powder from slag making and protective effect, can preferentially form silicate with the oxygen element that enters molten bath, be covered in weld pool surface, prevent liquid metal transition oxidation, improve the wettability of liquid metal.Ferrite is had to larger admittedly molten invigoration effect, silicon energy refine pearlite tissue, but too high Si is unfavorable to the weldability of steel.
Iron (Fe): identical with the material of milling cutter matrix, increase the compatibility of liquid metal and matrix, improve the intensity of cladding layer metallurgical binding, make this cermet powder with the surperficial full and uniform fusion of milling cutter.
Molybdenum (Mo): as a kind of rare earth element additive, promote grain refinement, improve the structural homogenity of cladding layer, thereby improve the polishing machine of cladding layer.
Adopted after technique scheme, effect of the present invention is: this cobalt-based cermet powder is specifically designed to the laser melting coating on milling cutter surface, can fully merge with milling cutter base material, each composition is uniformly distributed in cladding layer, adopt ultrahigh hardness ceramic particle to improve hardness and the intensity of milling cutter, select again in addition some trace elements to improve blades wear and heat resistance, when improving milling cutter mechanical performance, reduced cost.
The specific embodiment
Below by specific embodiment, the present invention is described in further detail.
Embodiment 1
By 130g tungsten carbide, 1g carbon, 20g calcirm-fluoride, 40g silicon nitride, 40g boron, 13g vanadium, 11g silicon, 60g iron, 110g molybdenum, the sufficient mechanical mixture of 575g cobalt, obtain 100-200 object cobalt-based cermet powder.
Embodiment 2
By 150g tungsten carbide, 4g carbon, 60g calcirm-fluoride, 60g silicon nitride, 60g boron, 16g vanadium, 14g silicon, 80g iron, 140g molybdenum, the sufficient mechanical mixture of 416g cobalt, obtain 100-200 object cobalt-based cermet powder.
Embodiment 3
By 140g tungsten carbide, 3g carbon, 40g calcirm-fluoride, 50g silicon nitride, 50g boron, 15g vanadium, 12g silicon, 70g iron, 130g molybdenum, the sufficient mechanical mixture of 490g cobalt, obtain 100-200 object cobalt-based cermet powder.
Powder injection hole by the metal alloy powders mixing in this embodiment 3 by laser head evenly sprays, powder feeding direction and the laser beams coaxial of cermet powder, the optical maser wavelength of laser is 1.06 μ m, power output is 4000W, the speed of service is 2m/min, and single track width is 2mm.The milling cutter obtaining through laser melting coating carries out mechanical detection and obtains following data: (distance in following table is that to take the lowest surface of cladding layer be base plane, and base plane is above for just, and base plane is below for bearing)
Within the technical scope that any technical staff discloses in the present invention, according to technical scheme of the present invention and inventive concept, be equal within the technical scheme of replacing or changing all should fall into protection scope of the present invention.
Claims (2)
1. the cobalt-based cermet powder that is exclusively used in milling cutter laser melting coating, by weight percentage, comprises 13-15% tungsten carbide, 0.1-0.4% carbon, 2-6% calcirm-fluoride, 4-6% silicon nitride, 4-6% boron, 1.3-1.6% vanadium, 1.1-1.4% silicon, 6-8% iron, 11-14% molybdenum, surplus is cobalt.
2. the cobalt-based cermet powder that is exclusively used in milling cutter laser melting coating as claimed in claim 1, is characterized in that: comprise 14% tungsten carbide, and 0.3% carbon, 4% calcirm-fluoride, 5% silicon nitride, 5% boron, 1.5% vanadium, 1.2% silicon, 7% iron, 13% molybdenum, surplus is cobalt.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310241635.6A CN103537662A (en) | 2013-06-18 | 2013-06-18 | Cobalt-based metal ceramic alloy powder special for laser cladding of milling cutter |
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| CN201310241635.6A CN103537662A (en) | 2013-06-18 | 2013-06-18 | Cobalt-based metal ceramic alloy powder special for laser cladding of milling cutter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106756256A (en) * | 2016-12-29 | 2017-05-31 | 沈阳大陆激光工程技术有限公司 | One kind is used for big-and-middle-sized section roll laser composite manufacturing anti-attrition heat resistanceheat resistant Co-base alloy material |
| CN110747384A (en) * | 2019-11-21 | 2020-02-04 | 江苏威拉里新材料科技有限公司 | Cobalt-based metal powder |
Citations (4)
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| JP3368178B2 (en) * | 1997-07-30 | 2003-01-20 | 株式会社クボタ | Manufacturing method of composite sintered alloy for non-ferrous metal melt |
| CN1670226A (en) * | 2004-03-17 | 2005-09-21 | 浙江工业大学 | Laser intensifying method on metal surface of water pump parts |
| CN102650012A (en) * | 2012-05-05 | 2012-08-29 | 张家港市和昊激光科技有限公司 | Special cobalt-based metal ceramic alloy powder for optical fiber laser cladding |
| CN102943266A (en) * | 2012-12-12 | 2013-02-27 | 江苏新亚特钢锻造有限公司 | High abrasion-proof laser cladding cobalt-base alloy powder and preparation method thereof |
-
2013
- 2013-06-18 CN CN201310241635.6A patent/CN103537662A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3368178B2 (en) * | 1997-07-30 | 2003-01-20 | 株式会社クボタ | Manufacturing method of composite sintered alloy for non-ferrous metal melt |
| CN1670226A (en) * | 2004-03-17 | 2005-09-21 | 浙江工业大学 | Laser intensifying method on metal surface of water pump parts |
| CN102650012A (en) * | 2012-05-05 | 2012-08-29 | 张家港市和昊激光科技有限公司 | Special cobalt-based metal ceramic alloy powder for optical fiber laser cladding |
| CN102943266A (en) * | 2012-12-12 | 2013-02-27 | 江苏新亚特钢锻造有限公司 | High abrasion-proof laser cladding cobalt-base alloy powder and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106756256A (en) * | 2016-12-29 | 2017-05-31 | 沈阳大陆激光工程技术有限公司 | One kind is used for big-and-middle-sized section roll laser composite manufacturing anti-attrition heat resistanceheat resistant Co-base alloy material |
| CN110747384A (en) * | 2019-11-21 | 2020-02-04 | 江苏威拉里新材料科技有限公司 | Cobalt-based metal powder |
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Application publication date: 20140129 |