CN103352220A - Ni based metal ceramic alloy powder special for camshaft laser cladding - Google Patents
Ni based metal ceramic alloy powder special for camshaft laser cladding Download PDFInfo
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- CN103352220A CN103352220A CN2013102417363A CN201310241736A CN103352220A CN 103352220 A CN103352220 A CN 103352220A CN 2013102417363 A CN2013102417363 A CN 2013102417363A CN 201310241736 A CN201310241736 A CN 201310241736A CN 103352220 A CN103352220 A CN 103352220A
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- camshaft
- based metal
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- laser cladding
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Abstract
The invention discloses a Ni based metal ceramic alloy powder special for camshaft laser cladding. The alloy powder comprises, by weight: 11-13% of titanium carbide, 0.4-0.8% of carbon, 2-4% of calcium fluoride, 3-5% of silicon nitride, 14-16% of chromium, 1.4-1.8% of silicon, 4-6% of iron, 16-18% of molybdenum, 0.6-1.0% of manganese, and the balance nickel. The Ni based metal ceramic alloy powder is exclusively used for laser cladding of a camshaft. By means of a laser cladding process, a cladding layer can be generated on the camshaft surface. The Ni based metal ceramic alloy powder can reduce the pore, crack and shrink hole defects of the cladding layer, and can improve the toughness, wear resistance, strength and heat resistance of the camshaft.
Description
Technical field
The present invention relates to a kind of powdered alloy, refer to especially a kind of nickel based metal ceramal powder that is exclusively used in the camshaft 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.Camshaft is parts in the piston engine.Its effect is the opening and closing action of control valve.Usually its rotating speed is very high, need to bear very large moment of torsion, therefore very high in the requirement aspect intensity and the support to camshaft in the design, its material generally is Special Casting Iron, also has once in a while to adopt forging.Camshaft easily produces the faults such as inordinate wear, abnormal sound and fracture in the life-time service process.
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 camshaft laser melting coating is provided, this nickel based metal ceramal powder is exclusively used in the laser melting coating of camshaft, can make the surface of camshaft produce cladding layer by laser melting and coating process, this nickel based metal ceramal powder can reduce pore, crackle and the shrinkage cavity defect of cladding layer, improve the toughness of camshaft, wear resistance, intensity and thermotolerance.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of nickel based metal ceramal powder that is exclusively used in the camshaft laser melting coating, by weight percentage, its composition is the 11-13% titanium carbide, 0.4-0.8% carbon, 2-4% Calcium Fluoride (Fluorspan), 3-5% silicon nitride, 14-16% chromium, 1.4-1.8% silicon, 4-6% iron, 16-18% molybdenum, 0.6-1.0% manganese, surplus are nickel.
Wherein, the nickel based metal ceramal powder optimum ratio that is exclusively used in the camshaft laser melting coating is 12% titanium carbide, 0.6% carbon, and 3% Calcium Fluoride (Fluorspan), 4% silicon nitride, 15% chromium, 1.6% silicon, 5% iron, 17% molybdenum, 0.8% manganese, surplus is nickel.
The effect of each composition is as follows in the nickel based metal ceramal powder among the present invention:
Nickel (Ni): as cermet substrate, thorough melting during cladding, together form laser molten pool with the camshaft base material of molten state, even distribution after coagulation in the molten bath becomes cladding layer for other elements or compound, by increasing the residual austenite in the cladding layer, improves plasticity and the toughness of cladding layer, reduce the thermal expansivity of cladding layer, reduce unrelieved stress, eliminate stress concentrated, thereby eliminate crackle and shrinkage porosite.
Titanium carbide (TiC) particle: in laser cladding process, do not melt, nickel based metal ceramal powder evenly sprays from printhead to the camshaft laser melting coating time, titanium carbide is evenly distributed in the molten bath, be present in the cladding layer as strengthening particulate, greatly strengthened hardness and the intensity of cladding layer.
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 the selection of carbon content should when guaranteeing that camshaft has certain wear resistance, keep toughness as much as possible in this cermet powder.
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 titanium carbide (TiC), 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 has also improved erosion resistance.
Iron (Fe): identical with the material of camshaft 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 camshaft.
Chromium (Cr): have stronger solution strengthening ability, improve the intensity of cladding layer, can increase the quenching degree of steel and the deformability after the quenching, improve hardening capacity, and make cladding layer have good erosion resistance, wear resistance, elasticity, thermotolerance, coercive force and anti-brute force.
Silicon (Si): in Self-fusing 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 the liquid metal over oxidation, improve the wetting ability of liquid metal.Ferrite is had larger solution strengthening effect, and silicon can the refine pearlite tissue.
Manganese (Mn): the hardening capacity that significantly improves steel, all can play larger solution strengthening effect to ferrite and austenite so that steel possess higher intensity and hardness, when the meeting of manganese too high levels so that steel have obvious temper brittleness, manganese can promote austenite to grow up, and makes steel to overheated responsive.
Molybdenum (Mo): can promote grain refining as a kind of additive, improve the homogeneity of structure of cladding layer, thereby improve the wear Characteristics of cladding layer.
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 of camshaft, can fully merge with the camshaft surface substrate, each homogeneous chemical composition is distributed in the cladding layer, reduce pore, crackle and the shrinkage cavity defect of cladding layer, adopt the ultrahigh hardness ceramic particle to improve the hardness of camshaft, select again in addition some trace elements to guarantee the toughness of camshaft, intensity, wear resistance and thermotolerance, prolong work-ing life, avoided occurring the faults such as inordinate wear, abnormal sound and fracture.
Embodiment
The present invention is described in further detail below by specific embodiment.
Embodiment 1
110g titanium carbide, 4g carbon, 20g Calcium Fluoride (Fluorspan), 30g silicon nitride, 140g chromium, 14g silicon, 40g iron, 160g molybdenum, 6g manganese, 476g nickel are fully mixed, obtain grain diameter at 100-200 purpose nickel based metal ceramal powder.
Embodiment 2
130g titanium carbide, 8g carbon, 40g Calcium Fluoride (Fluorspan), 50g silicon nitride, 160g chromium, 18g silicon, 60g iron, 180g molybdenum, 10g manganese, 344g nickel are fully mixed, obtain grain diameter at 100-200 purpose nickel based metal ceramal powder.
Embodiment 3
120g titanium carbide, 6g carbon, 30g Calcium Fluoride (Fluorspan), 40g silicon nitride, 150g chromium, 16g silicon, 50g iron, 170g molybdenum, 8g manganese, 410g nickel are fully mixed, obtain grain diameter at 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 3m/min, and the single track width is 2mm.The camshaft that the process laser melting coating obtains 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 nickel based metal ceramal powder of camshaft laser melting coating, by weight percentage, its composition is the 11-13% titanium carbide, 0.4-0.8% carbon, 2-4% Calcium Fluoride (Fluorspan), 3-5% silicon nitride, 14-16% chromium, 1.4-1.8% silicon, 4-6% iron, the 16-18% molybdenum, 0.6-1.0% manganese, surplus is nickel.
2. the nickel based metal ceramal powder that is exclusively used in the camshaft laser melting coating as claimed in claim 1, it is characterized in that: its composition is 12% titanium carbide, 0.6% carbon, 3% Calcium Fluoride (Fluorspan), 4% silicon nitride, 15% chromium, 1.6% silicon, 5% iron, 17% molybdenum, 0.8% manganese, surplus is nickel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013102417363A CN103352220A (en) | 2013-06-18 | 2013-06-18 | Ni based metal ceramic alloy powder special for camshaft laser cladding |
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| CN2013102417363A CN103352220A (en) | 2013-06-18 | 2013-06-18 | Ni based metal ceramic alloy powder special for camshaft laser cladding |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953407A (en) * | 2014-04-25 | 2014-07-30 | 苏州工业园区职业技术学院 | Engine camshaft and preparation method thereof |
| CN105603420A (en) * | 2016-03-17 | 2016-05-25 | 苏州范德雅特新材料科技有限公司 | High-wear-resistance cermet coating |
| CN107984115A (en) * | 2017-11-08 | 2018-05-04 | 蚌埠市华鼎机械科技有限公司 | A kind of method of laser welding processing lead-acid accumulator |
| CN114645158A (en) * | 2022-02-24 | 2022-06-21 | 江苏斯普瑞科技有限公司 | Composite powder material for laser surface strengthening of ball valve and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0336231A (en) * | 1989-07-03 | 1991-02-15 | Fujitsu Ltd | Lightweight wear-resistant member and its manufacture |
| CN102268672A (en) * | 2011-07-26 | 2011-12-07 | 上海工程技术大学 | Preparation method of in-situ autogenic TiC-particle-reinforced nickel-based gradient coating |
| 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 CN2013102417363A patent/CN103352220A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0336231A (en) * | 1989-07-03 | 1991-02-15 | Fujitsu Ltd | Lightweight wear-resistant member and its manufacture |
| CN102268672A (en) * | 2011-07-26 | 2011-12-07 | 上海工程技术大学 | Preparation method of in-situ autogenic TiC-particle-reinforced nickel-based gradient coating |
| 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 (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953407A (en) * | 2014-04-25 | 2014-07-30 | 苏州工业园区职业技术学院 | Engine camshaft and preparation method thereof |
| CN105603420A (en) * | 2016-03-17 | 2016-05-25 | 苏州范德雅特新材料科技有限公司 | High-wear-resistance cermet coating |
| CN107984115A (en) * | 2017-11-08 | 2018-05-04 | 蚌埠市华鼎机械科技有限公司 | A kind of method of laser welding processing lead-acid accumulator |
| CN114645158A (en) * | 2022-02-24 | 2022-06-21 | 江苏斯普瑞科技有限公司 | Composite powder material for laser surface strengthening of ball valve and application thereof |
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Application publication date: 20131016 |