CN1854317A - Powdery alloy processing material in site by movable laser smelt-coating process - Google Patents
Powdery alloy processing material in site by movable laser smelt-coating process Download PDFInfo
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- CN1854317A CN1854317A CN 200510046284 CN200510046284A CN1854317A CN 1854317 A CN1854317 A CN 1854317A CN 200510046284 CN200510046284 CN 200510046284 CN 200510046284 A CN200510046284 A CN 200510046284A CN 1854317 A CN1854317 A CN 1854317A
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Abstract
A movable field processing alloy powder material for the laser melting is to reinforce the nickel-base alloy using the below elements: Cr, W, Mo, Al, Ti, Co; also it can be added with the Co, C, N, Nb, Cu, B, Si and the minim rare-earth metal which can be the Ce, Y and the Hf. The invention has the high hardness, the strength and the low melting point, high wearing resistance. It has improved the cracking resistance, moldability, the stability and the uniformity of the laser melting layer. So it can repair the high temperature alloy, the carbon steel, the structural steel and the stainless steel by the laser melting.
Description
Technical field:
The present invention relates to Materials science, a kind of powdery alloy processing material in site by movable laser smelt-coating process is provided especially.
Background technology:
Laser melting coating is as a kind of advanced person's coating technology, and since nineteen seventies, along with improving constantly of laser power and stability, this technology has obtained rapid promotion and application.Laser melting coating is to obtain and the firm metallurgical binding of matrix in the metallic surface, and the modern technique of the high-performance surface coating of defective such as pore-free, crackle, it can be with dystectic alloy material cladding at low-melting substrate surface, also can on low-cost base material, prepare high performance top coat, to replace a large amount of senior high performance integral materials, save the noble metal material, reduce the component cost.
The metal-powder that does not almost have at present the laser melting coating special use on the domestic and international market, majority are to adopt thermospray or surfacing metal-powder, or are having now on the powder basis by the heterogeneity proportioning, taking the powder mixing machine mode to prepare the required powder of laser melting coating.Though this respect has been obtained some progress, but still there are a lot of problems.These mixed powders are owing to have it self original technology characteristics, so can't satisfy and be applicable to the processing requirement of specific base material laser melting coating fully, still exist such as crackle, be mingled with, defectives such as pore, uneven components, unstable properties.
In the prior art, the powder that laser melting coating is used all requires could use under atmosphere protection, and this has higher requirement to working conditions.The market expectation obtains a kind of can conveniently the use and well behaved laser melting coating material.
Summary of the invention:
The purpose of this invention is to provide a kind of powdery alloy processing material in site by movable laser smelt-coating process, it can be applicable to not have in the laser melting coating operation of atmosphere protection.
A kind of powdery alloy processing material in site by movable laser smelt-coating process of the present invention, it is characterized in that: the required powder of described material laser cladding is on the nickel-base alloy basis, obtains behind a kind of reinforcement the in the following element of interpolation at least: Cr, W, Mo, Al, Ti, Co.
Powdery alloy processing material in site by movable laser smelt-coating process of the present invention is characterized in that: the required powder of described material laser cladding is on the nickel-base alloy basis, adds B, Si and trace rare-earth element and forms.
By adding an amount of B, Si and trace rare-earth element and adjusting each element ratio, nickel-base alloy can form after solidifying and contain the parent of disperse phase, and is embedded with the tissue of a large amount of second phase particles therein.Thereby realized that alloy when having higher hardness and intensity, has reduced alloy melting point again, increased wear-resisting, corrosion resisting property.Fundamentally solve and improved splitting resistance, formability, technology stability and the homogeneity of ingredients of powdered alloy in laser cladding layer, satisfied the over-all properties requirement of remanufactured component cladding layer heatproof, anti-corrosion, wear-resisting, antifatigue and higher-strength etc.
Powdery alloy processing material in site by movable laser smelt-coating process of the present invention is characterized in that: add at least a following trace rare-earth element in the described material: Ce, Y, Hf etc., its total amount is the powder gross weight by weight percentage≤1%.
Powdery alloy processing material in site by movable laser smelt-coating process of the present invention is characterized in that: the composition of described material is by weight percentage: Cr:15～25%; W:5～10%; Mo:4～8%; Fe:0.5～3%; Al:0.4～2%; Ti:1～2%; Si:1～2%; B:0.2～1%; Re:0.2～1%; Ni: surplus.
Powdery alloy processing material in site by movable laser smelt-coating process of the present invention is characterized in that: also contain by weight percentage in the described material≤2% following element one of them or its any one combination: Co, C, N, Nb, Cu.
Powdery alloy processing material in site by movable laser smelt-coating process of the present invention is characterized in that: the composition of described material is by weight percentage: Cr:15～25%; W:5～10%; Mo:4～8%; Fe:0.5～3%; Al:0.4～2%; Ti:1～2%; Si:1～2%; B:0.2～1%; Re:0.2～1%; Ce, Y, Hf one of them or its any one combination :≤1%; Co, C, N, Nb, Cu one of them or its any one combination :≤2%; Ni: surplus.
Powdery alloy processing material in site by movable laser smelt-coating process of the present invention is characterized in that: the granularity of described material is 53～150 μ m.
Powdery alloy processing material in site by movable laser smelt-coating process of the present invention is characterized in that: described material does not have at the scene under the condition of atmosphere protection and uses.This provides great convenience for practical application.
A kind of powdery alloy processing material in site by movable laser smelt-coating process of the present invention prepares by following operation: vacuum melting, atomizing, screening; Material particle size is 53～150 μ m.
Can adopt 5000W crossing current high pressure continuous CO 2 laser device when powdery alloy processing material in site by movable laser smelt-coating process of the present invention is used at the scene, use described material and be: power: 2000～3500W at the processing parameter that the low-alloy medium carbon structure steel diameter of axle carries out the laser melting coating operation; Focal length: 320～400mm; Spot diameter: 3～5mm; Sweep velocity: 240～400mm/min.
Powdery alloy processing material in site by movable laser smelt-coating process of the present invention is mainly used in the aircraft engine rotatable parts, petrochemical industry Turbine Disk and blade, the laser repairing of component such as power industry generator, steam turbine rotor shaft.
The invention has the advantages that: on the nickel-base alloy basis that utilizes elements such as Cr, Co, W, Mo, Al, Ti to strengthen, by adjusting each element ratio and adding an amount of B, Si and trace rare-earth element, alloy can be formed after solidifying contain the parent of disperse phase, and be embedded with the tissue of a large amount of second phase particles therein.Thereby realized that alloy when having higher hardness and intensity, has reduced alloy melting point again, increased wear-resisting, corrosion resisting property.Fundamentally solve and improved splitting resistance, formability, technology stability and the homogeneity of ingredients of powdered alloy in laser cladding layer, satisfied the over-all properties requirement of remanufactured component cladding layer heatproof, anti-corrosion, wear-resisting, antifatigue and higher-strength etc.Simultaneously, the present invention can be applied to be applicable to materials such as superalloy, carbon steel, structure iron, stainless steel are carried out the laser melting coating reparation that this greatly facilitates practical application, has extremely vast potential for future development under the condition of on-the-spot no atmosphere protection.
Embodiment:
A kind of powdery alloy processing material in site by movable laser smelt-coating process on the nickel-base alloy basis, utilizes a kind of composition in the following element to strengthen nickel-base alloy: Cr, W, Mo, Al, Ti, Co at least; Can also add B, Si and trace rare-earth element and form on the nickel-base alloy basis, the trace rare-earth element that adds in the described material is wherein a kind of of Ce, Y, Hf or its certain combination, its total amount by weight percentage≤the powder gross weight 1%; Can also contain by weight percentage in the described material≤2% following element one of them or its any one combination: Co, C, N, Nb, Cu.
Embodiment 1
The composition of described material can be Cr:15% by weight percentage; W:5%; Mo:8%; Fe:3%; Al:1%; Ti:1.5%; Si:1.2%; B:0.8%; Re:0.6%; Also contain one of following element: Co, C, N, Nb, Cu at least, Co, C, N, Nb, these several material compositions of Cu one of them or its any one be combined in weight percent≤2% in the total amount; Also add trace rare-earth element: Ce, Y, Hf in the described material, its total amount by weight percentage≤the powder gross weight 1%; Ni: surplus.
Powdery alloy processing material in site by movable laser smelt-coating process prepares by following operation: vacuum melting, atomizing, screening; Material particle size is 53～150 μ m.
This material is applied to certain C12-50 of heat power plant of zinc factory type 1# turbine rotor diameter of axle reparation: rotor weight is 6778kg, maximum 445 ℃ of working temperature, and 3000 rev/mins of number of moving part, working medium is a steam, the damage of the rotor diameter of axle is serious.Through machine add dispel fatigue layer after, carry out laser melting coating with the nickel-base alloy powder of development, adopt 5000W crossing current high pressure continuous CO 2 laser device, use the processing parameter that described material carries out the laser melting coating operation and be: power: 2000W; Focal length: 320; Spot diameter: 3mm; Sweep velocity: 240mm/min.Add complex through machine again.Detect through non-destructive test(ing)(NDT), do not find that hole is arranged, be mingled with, defective such as crackle, hardness is even, stable performance.It is stable that the running of dress back is returned by producer, uses normal.
Embodiment 2
Cr:25%; W:10%; Mo:4%; Fe:0.5%; Al:2%; Ti:1%; Si:2%; B:0.2%; Re:0.2%; Other: surplus.Also contain one of following element: Co, C, N, Nb, Cu at least in the surplus part; Co, C, N, Nb, these several material compositions of Cu one of them or its any one be combined in weight percent≤2% in the total amount; Also add trace rare-earth element: Ce, Y, Hf in the described material, its total amount by weight percentage≤the powder gross weight 1%; Ni: surplus.
Powdery alloy processing material in site by movable laser smelt-coating process prepares by following operation: vacuum melting, atomizing, screening; Material particle size is 53～150 μ m.Adopt 5000W crossing current high pressure continuous CO 2 laser device, use described material certain Utilities Electric Co.'s axial-flow fan blade diameter of axle is carried out laser melting coating reparation operation, (aerofoil fan counterweight endoporus causes distortion because of wearing and tearing, produce tapering, the blades axes that matches can not form shrink-fit with it, can't reach service requirements.) processing parameter is: power: 3500W; Focal length: 400mm; Spot diameter: 5mm; Sweep velocity: 400mm/min.Nickel-base alloy powder with development carries out adding complex through machine again after the laser melting coating operation to the blade diameter of axle.Detect through non-destructive test(ing)(NDT), do not find that hole is arranged, be mingled with, defective such as crackle, hardness is even, size is qualified, metallographic structure and mechanical property are uniform and stable.Satisfy cooperation, reach service requirements.
Embodiment 3
Cr:22%; W:7%; Mo:6%; Fe:2%; Al:0.4%; Ti:2%; Si:1%; B:1%; Re:1%; Other: surplus.Also contain one of following element: Co, C, N, Nb, Cu at least in the surplus part; Co, C, N, Nb, these several material compositions of Cu one of them or its any one be combined in weight percent≤2% in the total amount; Also add trace rare-earth element: Ce, Y, Hf in the described material, its total amount by weight percentage≤the powder gross weight 1%; Ni: surplus.
Powdery alloy processing material in site by movable laser smelt-coating process prepares by following operation: vacuum melting, atomizing, screening; Material particle size is 53～150 μ m.Adopt 5000W crossing current high pressure continuous CO 2 laser device, use described material certain power generator rotor spindle of major injury is carried out laser melting coating reparation operation, (generator rotor shaft weight is 45 tons, because of the mishap major injury.) processing parameter is: power: 3000W; Focal length: 360mm; Spot diameter: 4mm; Sweep velocity: 320mm/min.Nickel-base alloy powder with development carries out adding complex through machine again after the laser melting coating operation to generator rotor shaft.Detect through non-destructive test(ing)(NDT), do not find that hole is arranged, be mingled with, defective such as crackle, diameter of axle size is qualified, whole do not have a distortion, hardness is even, mechanical property is uniform and stable.Repair fast and satisfied the service requirements of power plant.
Claims (7)
1, a kind of powdery alloy processing material in site by movable laser smelt-coating process is characterized in that: described material is on the nickel-base alloy basis, obtains behind a kind of reinforcement the in the following element of interpolation at least: Cr, W, Mo, Al, Ti, Co.
2, according to the described powdery alloy processing material in site by movable laser smelt-coating process of claim 1, it is characterized in that: the required powder of described material laser cladding is on the nickel-base alloy basis, adds B, Si and trace rare-earth element and forms.
3, according to the described powdery alloy processing material in site by movable laser smelt-coating process of claim 2, it is characterized in that: add at least a following trace rare-earth element in the described material: Ce, Y, Hf, its total amount is the powder gross weight by weight percentage≤1%.
4, according to the described powdery alloy processing material in site by movable laser smelt-coating process of claim 2, it is characterized in that: the composition of described material is by weight percentage:
Cr：15～25％；
W：5～10％；
Mo：4～8％；
Fe：0.5～3％；
Al：0.4～2％；
Ti：1～2％；
Si：1～2％；
B：0.2～1％；
Re：0.2～1％；
Ni: surplus.
5, according to the described powdery alloy processing material in site by movable laser smelt-coating process of claim 4, it is characterized in that: also contain in the described by weight percentage material≤2% following element one of them or its any one combination: Co, C, N, Nb, Cu.
6, according to the described powdery alloy processing material in site by movable laser smelt-coating process of claim 2, it is characterized in that: the composition of described material is by weight percentage:
Cr：15～25％；
W：5～10％；
Mo：4～8％；
Fe：0.5～3％；
Al：0.4～2％；
Ti：1～2％；
Si：1～2％；
B：0.2～1％；
Re：0.2～1％；
Ce, Y, Hf one of them or its any one combination :≤1%;
Co, C, N, Nb, Cu one of them or its any one combination :≤2%;
Ni: surplus.
7, according to one of them described powdery alloy processing material in site by movable laser smelt-coating process of claim 1～6, it is characterized in that: the granularity of described material is 53～150 μ m.
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| CNB2005100462849A CN100439521C (en) | 2005-04-19 | 2005-04-19 | Powdery alloy processing material in site by movable laser smelt-coating process |
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