CN103305835A - Special cobalt-based ceramic alloy powder for laser cladding on surface of gear - Google Patents
Special cobalt-based ceramic alloy powder for laser cladding on surface of gear Download PDFInfo
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- CN103305835A CN103305835A CN2013102417594A CN201310241759A CN103305835A CN 103305835 A CN103305835 A CN 103305835A CN 2013102417594 A CN2013102417594 A CN 2013102417594A CN 201310241759 A CN201310241759 A CN 201310241759A CN 103305835 A CN103305835 A CN 103305835A
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Abstract
The invention discloses a special cobalt-based ceramic alloy powder for laser cladding on the surface of a gear. The special cobalt-based ceramic alloy powder comprises the following compositions in percentage by weight: 11-13% of tungsten carbide, 0.2-0.5% of carbon, 5-8% of calcium fluorine, 3-5% of silicon nitride, 4-8% of ferrum, 18-20% of molybdenum, 13-15% of chromium, 0.8-1% of manganese, and the balance of cobalt. The special cobalt-based ceramic alloy powder is specially used for laser cladding of the gear, the metal tissue compactness on the surface of the gear can be improved, so that the hardness, strength and wear resistance of the gear can be enhanced.
Description
Technical field
The present invention relates to a kind of powdered alloy, refer to especially a kind of cobalt-based cermet powder that is exclusively used in the gear surface laser melting coating.
Background technology
Laser has high brightness, high directivity, high monochromaticity, high coherency's characteristics, is just used by increasing field now, and laser melting coating is exactly a kind of in the process for treating surface.That summarizes says, the principle of laser melting coating is utilized high energy laser beam irradiation metal material surface exactly, substrate surface is melted rapidly, liquid metal forms a small-scale molten bath, fill in simultaneously new powdered material, in this molten bath, metallic substance originally mixes mutually with the powder that is added, and forms the new liquid-metal layer of one deck.Treat after the laser beam process, liquid-metal layer rapidly cooling forms the solid-state cladding layer of one deck thus in the metallic surface.Right working gear environment is abominable, common gear exists difference of hardness, intensity defective low, easy to wear, so just caused gear the failure phenomenons such as tooth surface abrasion, break of gear tooth, tooth face agglutination to occur, for this reason, common way all is to adopt expensive high performance material to make gear at present, cause the cost of gear to increase, practicality just reduces greatly, and small business can't bear.Do not use at present laser melting coating that gear is carried out surface treatment, its reason is except the melting and coating process complexity, the metal-powder that is exclusively used in the Gear by Laser cladding is not importantly arranged, and utilize the plain metal powder that gear is carried out finding behind the laser melting coating, the plain metal powder conducts heat inhomogeneous with melting, degrees of fusion between metal-powder and the gear base material is poor, cause the defectives such as cladding layer easily cracks, shrinkage porosite, shrinkage cavity, pore, cause gear mechanism performance behind the laser melting coating not reach the requirement of expection.
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 the gear surface laser melting coating is provided, this cobalt-based cermet powder is exclusively used in the laser melting coating of gear, improve gear surface metal structure compactness, reduce the defectives such as crackle, shrinkage porosite, pore in the cladding layer, thereby improve the hardness of gear, intensity, wear resistance.
For solving the problems of the technologies described above, technical scheme of the present invention is: be exclusively used in the cobalt-based cermet powder of gear surface laser melting coating, by weight percentage, comprise the 11-13% wolfram varbide, 0.2-0.5% carbon, 5-8% Calcium Fluoride (Fluorspan), 3-5% silicon nitride, 4-8% iron, the 18-20% molybdenum, 13-15% chromium, 0.8-1% manganese, surplus is cobalt.
Wherein, the cobalt-based cermet powder optimum ratio that is exclusively used in the gear surface laser melting coating is: comprise 12% wolfram varbide, and 0.5% carbon, 5% Calcium Fluoride (Fluorspan), 5% silicon nitride, 4% iron, 18% molybdenum, 13% chromium, 0.8% manganese, surplus is cobalt.
The effect of each composition is as follows in the cobalt-based cermet powder among the present invention:
Wolfram varbide (WC): belong to metal ceramic powder, be present in the cladding layer as strengthening particulate, can greatly improve cladding layer hardness and intensity, can reduce the susceptibility of cladding layer cracking.
Carbon (C): belong to non-metallic element, carbon content is higher, hardness is just higher, wear resisting property 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 the selection of C content guarantees that gear satisfies wear resistance in this cermet powder, take into account as much as possible toughness and erosion resistance.
Calcium Fluoride (Fluorspan) (CaF2): as adding material, the internal stress when solidifying for the minimizing cladding layer defectives such as thermal crack, shrinkage cavity and porosity occur after preventing from solidifying, and 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, oxidation-resistance improves erosion resistance.
Iron (Fe): identical with the material of gear matrix, increase the affinity of liquid metal and matrix, the intensity of raising cladding layer metallurgical binding, make this cermet powder with the full and uniform fusion of gear surface.
Molybdenum (Mo): as a kind of rare earth element additive, promote grain refining, improve the homogeneity of structure of cladding layer, thereby improve the polishing machine of cladding layer.
Chromium (Cr): have stronger solution strengthening ability, improve the intensity of cladding layer, can strongly improve the hardening capacity of steel, and have good erosion resistance.Increase mechanical property and the wear resistance of steel, can increase the quenching degree of steel and the deformability after the quenching.Can increase again simultaneously hardness, elasticity, coercive force and the anti-brute force of steel, the solidity to corrosion of increase steel and thermotolerance etc.
Manganese (Mn): the hardening capacity that strongly improves steel, all can play larger solution strengthening effect to ferrite and austenite, so that steel possess high intensity and hardness, the too high meeting of Mn is so that steel have obvious temper brittleness, Mn impels austenite to grow up, and makes steel to overheated responsive.
Cobalt (Co): as cermet substrate, thorough melting during cladding together forms laser molten pool with the base material of molten state, for other elements or compound in the molten bath evenly the distribution after coagulation become cladding layer, to increase cladding layer hardness.
After having adopted technique scheme, effect of the present invention is: this cobalt-based cermet powder is specifically designed to the laser melting coating of gear surface, can fully merge with the gear base material, each homogeneous chemical composition is distributed in the cladding layer, for the situation of the work under bad environment of gear, adopt the ultrahigh hardness ceramic particle to improve the hardness of gear surface, select again in addition some trace elements to improve gear wear resistance and intensity, thereby make gear can adapt to various abominable Working environments, increase the service life.
Embodiment
The present invention is described in further detail below by specific embodiment.
Embodiment 1
With the 110g wolfram varbide, 2g carbon, 80g Calcium Fluoride (Fluorspan), the 30g silicon nitride, 80g iron, the 200g molybdenum, 150g chromium, 10g manganese, the 338g cobalt fully mixes, and obtains 100-200 order cobalt-based cermet powder.
Embodiment 2
With the 130g wolfram varbide, 3g carbon, 60g Calcium Fluoride (Fluorspan), the 40g silicon nitride, 60g iron, the 190g molybdenum, 140g chromium, 8g manganese, the 369g cobalt fully mixes, and obtains 100-200 order cobalt-based cermet powder.
Embodiment 3
With the 120g wolfram varbide, 5g carbon, 50g Calcium Fluoride (Fluorspan), the 50g silicon nitride, 40g iron, the 180g molybdenum, 130g chromium, 8g manganese, the 417g cobalt fully mixes, and obtains 100-200 order cobalt-based cermet powder.
The metal alloy powders that mixes among this embodiment 3 powder injection hole by laser head is evenly sprayed, powder feeding direction and the laser beams coaxial of cermet powder, the optical maser wavelength of laser are 1.06um, and output rating is 4000W, travelling speed is 2m/min, and the single track width is 2mm.The gear that obtains through laser melting coating carries out mechanical detection and obtains following data: (distance in the following table be lowest surface take cladding layer as base plane, base plane is above for just, base plane is following for bearing)
Any technician is equal to the technical scheme of replacing or changing according to technical scheme of the present invention and inventive concept and should be fallen within protection scope of the present invention within the technical scope that the present invention discloses.
Claims (2)
1. be exclusively used in the cobalt-based cermet powder of gear surface laser melting coating, by weight percentage, comprise the 11-13% wolfram varbide, 0.2-0.5% carbon, 5-8% Calcium Fluoride (Fluorspan), the 3-5% silicon nitride, 4-8% iron, the 18-20% molybdenum, 13-15% chromium, 0.8-1% manganese, surplus is cobalt.
2. the cobalt-based cermet powder that is exclusively used in the gear surface laser melting coating as claimed in claim 1 is characterized in that: comprise 12% wolfram varbide, and 0.5% carbon, 5% Calcium Fluoride (Fluorspan), 5% silicon nitride, 4% iron, 18% molybdenum, 13% chromium, 0.8% manganese, surplus is cobalt.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013102417594A CN103305835A (en) | 2013-06-18 | 2013-06-18 | Special cobalt-based ceramic alloy powder for laser cladding on surface of gear |
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| CN2013102417594A CN103305835A (en) | 2013-06-18 | 2013-06-18 | Special cobalt-based ceramic alloy powder for laser cladding on surface of gear |
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| CN103305835A true CN103305835A (en) | 2013-09-18 |
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| CN2013102417594A Pending CN103305835A (en) | 2013-06-18 | 2013-06-18 | Special cobalt-based ceramic alloy powder for laser cladding on surface of gear |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103600067A (en) * | 2013-11-20 | 2014-02-26 | 樊宇 | Cobalt-base metal alloy powder special for continuous fiber laser cladding |
| CN103600066A (en) * | 2013-11-20 | 2014-02-26 | 毛桂林 | Cobalt-base alloy powder special for continuous-wave fiber laser cladding |
| CN108359976A (en) * | 2018-04-10 | 2018-08-03 | 上海工程技术大学 | A method of for reducing laser melting coating alumina base composite coating crackle |
| CN109371393A (en) * | 2018-11-05 | 2019-02-22 | 阳泉煤业集团华越机械有限公司煤机装备研究院 | A kind of laser melting coating gear reconstruction restorative procedure |
| CN110418688A (en) * | 2017-03-14 | 2019-11-05 | Vbn组件有限公司 | High-carbon content cobalt-base alloys |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS602676A (en) * | 1983-06-21 | 1985-01-08 | Toshiba Corp | Formation of wear-resistant coating |
| JPH01165779A (en) * | 1987-12-21 | 1989-06-29 | Fukuda Metal Foil & Powder Co Ltd | Hardening material for inside of cylinder |
| CN101228295A (en) * | 2005-06-20 | 2008-07-23 | 普莱克斯S.T.技术有限公司 | Laser cladding on low heat resistant substrates |
| GB2484195A (en) * | 2010-09-28 | 2012-04-04 | Kennametal Inc | Substrate clad with a brazed layer comprising a nickel-based matrix and hard particles |
| 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 |
-
2013
- 2013-06-18 CN CN2013102417594A patent/CN103305835A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS602676A (en) * | 1983-06-21 | 1985-01-08 | Toshiba Corp | Formation of wear-resistant coating |
| JPH01165779A (en) * | 1987-12-21 | 1989-06-29 | Fukuda Metal Foil & Powder Co Ltd | Hardening material for inside of cylinder |
| CN101228295A (en) * | 2005-06-20 | 2008-07-23 | 普莱克斯S.T.技术有限公司 | Laser cladding on low heat resistant substrates |
| GB2484195A (en) * | 2010-09-28 | 2012-04-04 | Kennametal Inc | Substrate clad with a brazed layer comprising a nickel-based matrix and hard particles |
| 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 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103600067A (en) * | 2013-11-20 | 2014-02-26 | 樊宇 | Cobalt-base metal alloy powder special for continuous fiber laser cladding |
| CN103600066A (en) * | 2013-11-20 | 2014-02-26 | 毛桂林 | Cobalt-base alloy powder special for continuous-wave fiber laser cladding |
| CN110418688A (en) * | 2017-03-14 | 2019-11-05 | Vbn组件有限公司 | High-carbon content cobalt-base alloys |
| CN108359976A (en) * | 2018-04-10 | 2018-08-03 | 上海工程技术大学 | A method of for reducing laser melting coating alumina base composite coating crackle |
| CN109371393A (en) * | 2018-11-05 | 2019-02-22 | 阳泉煤业集团华越机械有限公司煤机装备研究院 | A kind of laser melting coating gear reconstruction restorative procedure |
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Application publication date: 20130918 |