CN103320788A - Special nickel-based metal ceramic alloy powder for laser cladding of surface of cylinder liner - Google Patents
Special nickel-based metal ceramic alloy powder for laser cladding of surface of cylinder liner Download PDFInfo
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- CN103320788A CN103320788A CN201310241740XA CN201310241740A CN103320788A CN 103320788 A CN103320788 A CN 103320788A CN 201310241740X A CN201310241740X A CN 201310241740XA CN 201310241740 A CN201310241740 A CN 201310241740A CN 103320788 A CN103320788 A CN 103320788A
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Abstract
The invention discloses special nickel-based metal ceramic alloy powder for the laser cladding of the surface of a cylinder liner. The alloy powder contains the following components by weight percent: 12% to 14% of silicon carbide, 0.2% to 0.3% of carbon, 3% to 5% of calcium fluoride, 3% to 5% of silicon nitride, 2% to 5% of silicon, 5% to 7% of iron, 15% to 18% of molybdenum, 16% to 20% of chromium and the balance of nickel. According to the special alloy powder for the laser cladding of the cylinder liner, the compactness of a metal tissue structure of the surface of the cylinder liner is improved, so that the toughness, the abrasion resistance, the strength, the heat resistance and the corrosion resistance of the cylinder liner are improved.
Description
Technical field
The present invention relates to a kind of powdered alloy, refer to a kind of nickel based metal ceramal powder that is exclusively used in the cylinder sleeve surface laser cladding especially.
Background technology
Laser has high brightness, high directivity, high monochromaticity, high coherency's characteristics, is just used by growing 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 new powdered material simultaneously, 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 that liquid-metal layer cooling rapidly forms the solid-state cladding layer of one deck thus in the metallic surface.Right cylinder sleeve work under bad environment, cylinder sleeve is very high to the requirement of material, good toughness need be arranged, wear no resistance, thermotolerance, erosion resistance and enough intensity, therefore, way is to adopt to meet the metal material manufacturing cylinder sleeve that above-mentioned mechanical property requires at present, causes the cost of cylinder sleeve very high.If can utilize laser melting and coating process that the inside and outside surface of cylinder sleeve is handled, so just can not only guarantee the mechanical property of cylinder sleeve but also reduce the cost of cylinder sleeve.Also be not exclusively used at present the metal-powder of cylinder sleeve laser melting coating, other metal-powders are when being used for the cylinder sleeve laser melting coating, and it is inhomogeneous with fusion to conduct heat, and the degrees of fusion between metal-powder and the base material is poor, causes defectives such as crackle, shrinkage cavity, pore.
Summary of the invention
Technical problem to be solved by this invention is: a kind of nickel based metal ceramal powder that is exclusively used in the cylinder sleeve surface laser cladding is provided, this nickel based metal ceramal powder is exclusively used in the laser melting coating of cylinder sleeve, improve cylinder sleeve surface metal weave construction compactness, thereby improve toughness, wear resistance, intensity, thermotolerance and the erosion resistance of cylinder sleeve.
For solving the problems of the technologies described above, technical scheme of the present invention is: be exclusively used in the nickel based metal ceramal powder of cylinder sleeve surface laser cladding, by weight percentage, comprise the silicon carbide of 12-14%, the carbon of 0.2-0.3%, the Calcium Fluoride (Fluorspan) of 3-5%, the silicon nitride of 3-5%, the silicon of 2-5%, the iron of 5-7%, the molybdenum of 15-18%, the chromium of 16-20%, surplus is nickel.
Wherein, the optimum ratio that is exclusively used in the nickel based metal ceramal powder of cylinder sleeve surface laser cladding is: 13% silicon carbide, and 0.2% carbon, 3% Calcium Fluoride (Fluorspan), 5% silicon nitride, 2% silicon, 7% iron, 15% molybdenum, 20% chromium, surplus is nickel.
The effect of each composition is as follows in the nickel based metal ceramal powder among the present invention:
Silicon carbide (SiC): 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 more high, hardness is just more high, wear resisting property is just more good, yield-point and tensile strength raise, but its toughness, plasticity, impact and corrosion resistance nature can reduce along with the increase of carbon content, so when the selection of C content guarantees that cylinder sleeve satisfies wear resistance in this cermet powder, take into account toughness and erosion resistance as much as possible.
Calcium Fluoride (Fluorspan) (CaF
2): as adding material, the internal stress when solidifying for the minimizing cladding layer defectives such as thermal crack, shrinkage cavity, shrinkage porosite occur after preventing from solidifying, and improves the compactness of metal structure.
Silicon nitride (SiN
4): exist as second kind of ceramic particle except silicon carbide (SiC), in cladding process, do not melt, but the thermal absorptivity to laser is big, 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.
Silicon (Si): in the self-fluxing nature powder, rise from slag making and provide protection, can preferentially form silicate with the oxygen element that enters the molten bath, be covered in weld pool surface, prevent liquid metal transition oxidation, improve the wetting ability of liquid metal.Ferrite there is bigger molten admittedly strengthening effect, silicon energy refine pearlite tissue, still, the weldability of the too high steel of Si is unfavorable.
Iron (Fe): identical with the material of cylinder sleeve matrix, increase the affinity 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 cylinder sleeve.
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 improve the hardening capacity of steel strongly, and have superior corrosion 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 simultaneously hardness, elasticity, coercive force and the anti-brute force of steel again, the solidity to corrosion of increase steel and thermotolerance etc.
After having adopted technique scheme, effect of the present invention is: this nickel based metal ceramal powder is specifically designed to the laser melting coating on cylinder sleeve surface, can fully merge with the cylinder sleeve base material, each composition is uniformly distributed in the cladding layer, situation at the work under bad environment of cylinder sleeve, adopt the ultrahigh hardness ceramic particle to improve the hardness on cylinder sleeve surface, select some trace elements to improve cylinder sleeve wear resistance, toughness, intensity, thermotolerance and erosion resistance in addition again, thereby make cylinder sleeve can adapt to various bad working environment, increase the service life.
Embodiment
The present invention is described in further detail below by specific embodiment.
Embodiment 1
With 120g silicon carbide, 3g carbon, 50g Calcium Fluoride (Fluorspan), the 30g silicon nitride, 50g silicon, 50g iron, the 180g molybdenum, 160g chromium, 357g nickel fully mixes, and obtains 100-200 purpose nickel based metal ceramal powder.
Embodiment 2
With 140g silicon carbide, 2g carbon, 40g Calcium Fluoride (Fluorspan), the 40g silicon nitride, 30g silicon, 60g iron, the 160g molybdenum, 180g chromium, 348g nickel fully mixes, and obtains 100-200 purpose nickel based metal ceramal powder.
Embodiment 3
With 130g silicon carbide, 2g carbon, 30g Calcium Fluoride (Fluorspan), the 50g silicon nitride, 20g silicon, 70g iron, the 150g molybdenum, 200g chromium, 348g nickel fully mixes, and obtains 100-200 purpose nickel based metal ceramal 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 1.06 μ m, and output rating is 4000W, travelling speed is 2m/min, and the single track width is 2mm.The cylinder sleeve that obtains through laser melting coating carries out mechanical detection and obtains following data: (distance in the following table is that the lowest surface with cladding layer is base plane, and base plane is above for just, and 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 nickel based metal ceramal powder of cylinder sleeve surface laser cladding, by weight percentage, comprise 12-14% silicon carbide, 0.2-0.3% carbon, 3-5% Calcium Fluoride (Fluorspan), the 3-5% silicon nitride, 2-5% silicon, 5-7% iron, the 15-18% molybdenum, 16-20% chromium, surplus is nickel.
2. the nickel based metal ceramal powder that is exclusively used in the cylinder sleeve surface laser cladding as claimed in claim 1 is characterized in that: comprise 13% silicon carbide, and 0.2% carbon, 3% Calcium Fluoride (Fluorspan), 5% silicon nitride, 2% silicon, 7% iron, 15% molybdenum, 20% chromium, surplus is nickel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310241740XA CN103320788A (en) | 2013-06-18 | 2013-06-18 | Special nickel-based metal ceramic alloy powder for laser cladding of surface of cylinder liner |
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| CN201310241740XA CN103320788A (en) | 2013-06-18 | 2013-06-18 | Special nickel-based metal ceramic alloy powder for laser cladding of surface of cylinder liner |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105112726A (en) * | 2015-08-27 | 2015-12-02 | 苏州莱特复合材料有限公司 | Nickel-based ceramic cylinder sleeve and powder metallurgy preparation method thereof |
| CN114318330A (en) * | 2021-12-14 | 2022-04-12 | 江苏紫金动力股份有限公司 | Method for strengthening engine cylinder sleeve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105112726A (en) * | 2015-08-27 | 2015-12-02 | 苏州莱特复合材料有限公司 | Nickel-based ceramic cylinder sleeve and powder metallurgy preparation method thereof |
| CN114318330A (en) * | 2021-12-14 | 2022-04-12 | 江苏紫金动力股份有限公司 | Method for strengthening engine cylinder sleeve |
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Application publication date: 20130925 |