CN104213000A - Laser-cladding-used nickel base alloy powder for producing high-temperature oxidation resistant coating layer - Google Patents
Laser-cladding-used nickel base alloy powder for producing high-temperature oxidation resistant coating layer Download PDFInfo
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Abstract
The invention belongs to the technical field of chemical engineering and metallurgy, in particular relates to laser-cladding-used nickel base alloy powder for producing a high-temperature oxidation resistant coating layer. The powder comprises Cr, Fe, Ni, B, Al, Si, V, C and Ni, and is characterized by further comprising Y2O3 and Hf, wherein the mass percentages of all the components are as follows: 3-7% of Cr, 0.6-2% of B, 0.6-2% of Al, 0.1-0.3% of C, 1-2.5% of V, 2-5% of Fe, 2-5% of Si, 0.1-0.3% of Y2O3, 0.1-0.3% of Hf, and the balance of Ni. The crack resistance, formability, process stability and component uniformity of the nickel base alloy powder in a laser cladding layer are improved; and the comprehensive performance requirements of a processing part for high-temperature oxidation resistance, fatigue resistance and proper hardness on the cladding layer are satisfied.
Description
Technical field
The invention belongs to chemical industry, metallurgical technology field, relate to a kind of nickel-base alloy powder powder material that is suitable for laser melting coating, particularly relate to a kind of laser melting coating high temperature oxidation resisting coating Co-based alloy powder.
Background technology
At present, high temperature oxidation resisting coating both domestic and external adopts the traditional technologys such as spraying, surfacing to make more, the problem that the high temperature oxidation resisting coating that these traditional technologys make has some to be difficult to overcome.Such as: high temperature oxidation resisting layer actual work ergosphere is very thin; Manufacture the defect such as easily produce pore in coating procedure, be mingled with; Coating and mother metal bonding surface are non-metallurgical binding, and coating is prone to the problem such as come off.Adopt laser melting and coating technique to manufacture high temperature oxidation resisting coating and can effectively overcome the above problems, and greatly reduce the processing condition requirement of manufacturing high temperature oxidation resisting coating, reduced cost simultaneously.
Laser melting coating, as a kind of advanced person's Metal Surface Modification Technique, along with improving constantly of laser power and stability, has obtained rapid popularization and widespread use.Laser melting coating is to obtain and the firm metallurgical binding of matrix in metallic surface, and the advanced process for modifying surface of the high-performance surface coating of pore-free, defects i.e.cracks, it can be by dystectic alloy material cladding the substrate surface in low melting point, also can on low-cost substrates, prepare high performance top coat, to replace senior, high performance integral material in a large number, save noble metal, reduce component cost.Laser melting coating has solved many ordinary methods and has been difficult to the problem that processing maybe cannot be processed, for surface of workpiece modification provides a kind of technology uniqueness, advanced effective means.
Co-based alloy powder has its special advantage in high temperature oxidation resisting field.But the special Co-based alloy powder of laser melting coating is actually rare in the market, and the Co-based alloy powder that the traditional technologys such as surfacing, spraying are used is allocated by different ratios, and is prepared required Co-based alloy powder with the form of powder mixing machine.That these mixed Ni base alloy powders exist is inhomogeneous such as mixing, granularity difference is large, fusing point is different, composition deviation, the equal problem of the coefficient of expansion, causes in actual cladding uncontrollable crackle, pore, segregation, performance shakiness, is difficult for the defects such as machine adds.
Though these Co-based alloy powders for laser melting coating can be obtained certain technique effect on the specific equipment unit of reparation, but owing to thering is self technology characteristics, can't meet and be applicable to the processing requirement of other specific base material laser melting coating, particularly can not meet the requirement that also will meet the pyro-oxidation resistance to cladding layer in splitting resistance, formability, technology stability and the homogeneity of ingredients of Co-based alloy powder in laser cladding layer.
Therefore, what research and development made new advances has laser melting coating high temperature oxidation resisting ability, stable performance high temperature oxidation resisting coating Co-based alloy powder, is the key subjects in described technical field.
Summary of the invention
In order to solve the problem in background technology, the invention provides a kind of laser melting coating high temperature oxidation resisting ability, stable performance high temperature oxidation resisting coating Co-based alloy powder that has.
Concrete technical scheme of the present invention is:
High temperature oxidation resisting coating Co-based alloy powder for a kind of laser melting coating, comprises Cr, Fe, Ni, B, Al, Si, V, C, Ni, characterized by further comprising Y
2o
3, Hf, wherein the mass percent of each component is:
Cr:3～7%; B:0.6～2%; Al:0.6～2%; C:0.1～0.3%; V:1～2.5%; Fe:2～5%; Si:2～5%; Y
2o
3: 0.1～0.3%; Hf:0.1～0.3%; Ni: surplus.
High temperature oxidation resisting coating Co-based alloy powder for above-mentioned laser melting coating, is characterized in that: the preferred version of the mass percent of each component is:
Cr:3%; B:0.6%; Al:0.6%; C:0.3%; V:1%; Fe:2%; Si:2%; Y
2o
3: 0.1%; Hf:0.1%; Ni: surplus.
High temperature oxidation resisting coating Co-based alloy powder for above-mentioned laser melting coating, is characterized in that: another preferred version of the mass percent of each component is:
Cr:7%; B:2%; Al:2%; C:0.1%; V:2.5%; Fe:5%; Si:5%; Y
2o
3: 0.3%; Hf:0.3%; Ni: surplus.
Main improvement of the present invention is: added two kinds of materials of yttrium oxide and hafnium, the vital effect that existing self the characteristic in conjunction with above two kinds of materials plays is in the present invention briefly described:
Yttrium oxide chemical formula is Y
2o
3, rare earth, ceramic additive; In the process forming at ceramic phase, play the effect of crystal grain thinning, can effectively suppress grain growing thick and grain-boundary crack and the defect brought; Y simultaneously
2o
3have good high-temperature behavior, can adapt to laser processing time, the high temperature at approximately 2200 DEG C, hot spot place, can not decompose or volatilize; Without substitute.
Hafnium, chemical formula is Hf, transition metal is very similar to the character of zirconium, after oxidation, can form form compact and stable oxide film, has high corrosion-resistant, resistance to elevated temperatures; Compared with zirconium, high-temperature behavior and the resistance to cleavage of Hf are better, and while more adapting to laser processing, the high temperature at approximately 2200 DEG C, hot spot place, can not volatilize.
What the present invention provided has laser melting coating Co-based alloy powder high temperature oxidation resisting, stable performance by the preparation meticulously of the operations such as vacuum melting, vacuum aerosolization, screening, and granularity is-100+270 order.
What the present invention provided has laser melting coating Co-based alloy powder high temperature oxidation resisting, stable performance, in actual cladding operation, adopt 1000～3000W continuous semiconductor laser apparatus, on the component of the materials such as carbon steel, structure iron, quenched and tempered steel and stainless steel, the melting and coating process parameter of applying described powdered material is: power: 1200～2800W, focal length: 220～350mm, spot size: 2 × 2mm～5 × 5mm, sweep velocity: 240～720mm/min, puts powder thickness: 0.5～1.5mm.
The present invention has laser melting coating nickel-base alloy powder powder material high temperature oxidation resisting ability, stable performance, be mainly used in titanium crystal growing furnace outer wall anti-oxidant, without the laser melting coating Zinc-corrosion resistant coating of the workpiece such as cooling sheet material crimping roller.
The invention has the advantages that:
1, the present invention is on nichrome basis, adds B, Al, V, Si as alloy substrate strengthening element, Y
2o
3as grain-boundary strengthening element and dispersoid particle material, and adjust the degree of each element with Hf.By multiple strengthening means, reinforced alloys matrix, has improved again crystal boundary quality, makes alloy obtain good over-all properties.Thereby realize alloy in thering is moderate hardness and intensity, reduced again alloy melting point, increased high temperature oxidation resisting, anti-fatigue performance.Fundamentally solve and improved splitting resistance, formability, technology stability and the homogeneity of ingredients of Co-based alloy powder in laser cladding layer, having met the over-all properties requirement of processing component to cladding layer Zinc-corrosion resistant, wear-resisting, antifatigue and moderate hardness etc.
2, the scope of application of this powdered material is larger, and the component of the materials such as carbon steel, structure iron, quenched and tempered steel, stainless steel and tool steel, all can adopt this powder to carry out laser cladding coating, and application prospect is extremely wide.
Embodiment
Contriver is in order to verify the advantage of powder of the present invention with respect to existing powder, to having gone out following simultaneous test:
First be to provide existing powder according to two tests that formula carries out of different ratios:
Test 1: the mother metal of selecting is titanium crystal growing furnace outer wall base material.Outer wall surface adopts polishing processing, and surface roughness Ra=1 μ m cleans up with acetone before cladding.The chemical composition of the Co-based alloy powder adopting is: Cr:5.6%; Al:1%; C:0.25%; W:4.5%; Fe:2.4%; Si:3%; Ni: surplus.
Adopt semiconductor laser, selected laser cladding technological parameter is: power: 1200～2800W, and focal length: 220～350mm, spot size: 2 × 2mm～5 × 5mm, sweep velocity: 240～720mm/min, puts powder thickness: 0.5～1.5mm.
Through laser melting coating, the high temperature oxidation resisting layer thickness obtaining is in 1mm left and right, and high temperature oxidation resisting layer surface irregularity, has the defects such as obvious crackle, pore.
Test 2: the mother metal of selecting is without the cooling sheet material crimping roller body of roll.Workpiece surface is processed with grinding machine, and surface roughness Ra=0.5 μ m cleans up with acetone before cladding.The chemical composition of the Co-based alloy powder adopting is: Cr:21.5%; C:0.05%; Mn:1.2%; Fe:1.5%; Si:1%; Ni: surplus.
Adopt semiconductor laser, selected laser cladding technological parameter is: power: 1200～2800W, and focal length: 220～350mm, spot size: 2 × 2mm～5 × 5mm, sweep velocity: 240～720mm/min, puts powder thickness: 0.5～1.5mm.
Through laser melting coating, the high temperature oxidation resisting layer thickness obtaining is in 1mm left and right, and high temperature oxidation resisting layer surface irregularity, has the defects such as obvious crackle, pore
Following list is the data of six kinds of embodiment making for this power formulations of this case contriver:
| ? | One | Two | Three | Four | Five | Six |
| Cr | 3 | 3.5 | 4 | 5 | 6 | 7 |
| B | 0.6 | 0.9 | 1.2 | 1.3 | 1.5 | 2 |
| Al | 0.6 | 0.9 | 1.2 | 1.3 | 1.5 | 2 |
| C | 0.3 | 0.25 | 0.2 | 0.18 | 0.15 | 0.1 |
| V | 1 | 1.2 | 1.5 | 1.7 | 2 | 2.5 |
| Fe | 2 | 2.5 | 3.3 | 3.7 | 4 | 5 |
| Si | 2 | 2.5 | 3 | 3.5 | 4 | 5 |
| Y 2O 3 | 0.1 | 0.2 | 0.2 | 0.2 | 0.2 | 0.3 |
| Hf | 0.1 | 0.2 | 0.2 | 0.2 | 0.2 | 0.3 |
Above-mentioned each embodiment, the surplus in powder is Ni
Example 1:
The mother metal that present embodiment is selected is titanium crystal growing furnace outer wall base material.Outer wall surface adopts polishing processing, and surface roughness Ra=1 μ m cleans up with acetone before cladding.The chemical composition of the Co-based alloy powder adopting is: Cr:3%; B:0.6%; Al:0.6%; C:0.3%; V:1%; Fe:2%; Si:2%; Y
2o
3: 0.1%; Hf:0.1%; Ni: surplus.Adopt semiconductor laser, selected laser cladding technological parameter is: power: 1200～2800W, and focal length: 220～350mm, spot size: 2 × 2mm～5 × 5mm, sweep velocity: 240～720mm/min, puts powder thickness: 0.5～1.5mm.
Through laser melting coating, the high temperature oxidation resisting layer thickness obtaining is in about 1mm, the surfacing of high temperature oxidation resisting layer, and the defects such as flawless, pore, high temperature oxidation resisting layer and mother metal are combined into metallurgical binding, and high temperature oxidation resisting, anti-fatigue performance are good.
Example 2:
The mother metal that present embodiment is selected is titanium crystal growing furnace outer wall base material.Outer wall surface adopts polishing processing, and surface roughness Ra=1 μ m cleans up with acetone before cladding.The chemical composition of the Co-based alloy powder adopting is: Cr:3.5%; B:0.9%; Al:0.9%; C:0.25%; V:1.2%; Fe:2.5%; Si:2.5%; Y
2o
3: 0.2%; Hf:0.2%; Ni: surplus.Adopt semiconductor laser, selected laser cladding technological parameter is: power: 1200～2800W, and focal length: 220～350mm, spot size: 2 × 2mm～5 × 5mm, sweep velocity: 240～720mm/min, puts powder thickness: 0.5～1.5mm.
Through laser melting coating, the high temperature oxidation resisting layer thickness obtaining is in about 1mm, the surfacing of high temperature oxidation resisting layer, and the defects such as flawless, pore, high temperature oxidation resisting layer and mother metal are combined into metallurgical binding, and high temperature oxidation resisting, anti-fatigue performance are good.
Example 3:
The mother metal that present embodiment is selected is that mother metal is titanium crystal growing furnace outer wall base material.Outer wall surface adopts polishing processing, and surface roughness Ra=1 μ m cleans up with acetone before cladding.The chemical composition of the Co-based alloy powder adopting is: Cr:4%; B:1.2%; Al:1.2%; C:0.2%; V:1.5%; Fe:3.3%; Si:3%; Y
2o
3: 0.2%; Hf:0.2%; Ni: surplus.Adopt semiconductor laser, selected laser cladding technological parameter is: power: 1200～2800W, and focal length: 220～350mm, spot size: 2 × 2mm～5 × 5mm, sweep velocity: 240～720mm/min, puts powder thickness: 0.5～1.5mm.
Through laser melting coating, the high temperature oxidation resisting layer thickness obtaining is in 1mm left and right, the surfacing of high temperature oxidation resisting layer, the defect such as flawless, pore, high temperature oxidation resisting layer and mother metal are metallurgical binding, and high temperature oxidation resisting, anti-fatigue performance are good, have certain wear resisting property concurrently simultaneously.
Example 4:
The mother metal that present embodiment is selected is without the cooling sheet material crimping roller body of roll.Workpiece surface is processed with grinding machine, and surface roughness Ra=0.5 μ m cleans up with acetone before cladding.The chemical composition of the Co-based alloy powder adopting is: Cr:5%; B:1.3%; Al:1.3%; C:0.18%; V:1.7%; Fe:3.7%; Si:3.5%; Y
2o
3: 0.2%; Hf:0.2%; Ni: surplus.Adopt semiconductor laser, selected laser cladding technological parameter is: power: 1200～2800W, and focal length: 220～350mm, spot size: 2 × 2mm～5 × 5mm, sweep velocity: 240～720mm/min, puts powder thickness: 0.5～1.5mm.
Through laser melting coating, the high temperature oxidation resisting layer thickness obtaining is in 1mm left and right, the surfacing of high temperature oxidation resisting layer, the defect such as flawless, pore, high temperature oxidation resisting layer and mother metal are metallurgical binding, and high temperature oxidation resisting, anti-fatigue performance are good, have certain wear resisting property concurrently simultaneously.
Example 5:
The mother metal that present embodiment is selected is without the cooling sheet material crimping roller body of roll.Workpiece surface is processed with grinding machine, and surface roughness Ra=0.5 μ m cleans up with acetone before cladding.The chemical composition of the Co-based alloy powder adopting is: Cr:6%; B:1.5%; Al:1.5%; C:0.15%; V:2%; Fe:4%; Si:4%; Y
2o
3: 0.2%; Hf:0.2%; Ni: surplus.Adopt semiconductor laser, selected laser cladding technological parameter is: power: 1200～2800W, and focal length: 220～350mm, spot size: 2 × 2mm～5 × 5mm, sweep velocity: 240～720mm/min, puts powder thickness: 0.5～1.5mm.
Through laser melting coating, the high temperature oxidation resisting layer thickness obtaining is in 1mm left and right, the surfacing of high temperature oxidation resisting layer, the defect such as flawless, pore, high temperature oxidation resisting layer and mother metal are metallurgical binding, and high temperature oxidation resisting, anti-fatigue performance are good, have certain wear resisting property concurrently simultaneously.
Example 6:
The mother metal that present embodiment is selected is without the cooling sheet material crimping roller body of roll.Workpiece surface is processed with grinding machine, and surface roughness Ra=0.5 μ m cleans up with acetone before cladding.The chemical composition of the Co-based alloy powder adopting is: Cr:7%; B:2%; Al:2%; C:0.1%; V:2.5%; Fe:5%; Si:5%; Y
2o
3: 0.3%; Hf:0.3%; Ni: surplus.Adopt semiconductor laser, selected laser cladding technological parameter is: power: 1200～2800W, and focal length: 220～350mm, spot size: 2 × 2mm～5 × 5mm, sweep velocity: 240～720mm/min, puts powder thickness: 0.5～1.5mm.
Through laser melting coating, the high temperature oxidation resisting layer thickness obtaining is in 1mm left and right, the surfacing of high temperature oxidation resisting layer, the defect such as flawless, pore, high temperature oxidation resisting layer and mother metal are metallurgical binding, and high temperature oxidation resisting, anti-fatigue performance are good, have certain wear resisting property concurrently simultaneously.
The test-results of the powder proposing in conjunction with above-mentioned test-results to existing powder and the present invention, can find out that powder of the present invention meets service requirements more than existing powder.
Claims (3)
1. a high temperature oxidation resisting coating Co-based alloy powder for laser melting coating, comprises Cr, Fe, Ni, B, Al, Si, V, C, Ni, characterized by further comprising Y
2o
3, Hf, wherein the mass percent of each component is:
Cr:3～7%; B:0.6～2%; Al:0.6～2%; C:0.1～0.3%; V:1～2.5%; Fe:2～5%; Si:2～5%; Y
2o
3: 0.1～0.3%; Hf:0.1～0.3%; Ni: surplus.
2. high temperature oxidation resisting coating Co-based alloy powder for laser melting coating according to claim 1, is characterized in that: the mass percent of each component is:
Cr:3%; B:0.6%; Al:0.6%; C:0.3%; V:1%; Fe:2%; Si:2%; Y
2o
3: 0.1%; Hf:0.1%; Ni: surplus.
3. high temperature oxidation resisting coating Co-based alloy powder for laser melting coating according to claim 1, is characterized in that: the mass percent of each component is:
Cr:7%; B:2%; Al:2%; C:0.1%; V:2.5%; Fe:5%; Si:5%; Y
2o
3: 0.3%; Hf:0.3%; Ni: surplus.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106835122A (en) * | 2017-01-23 | 2017-06-13 | 四川中物红宇科技有限公司 | Cermet coating and preparation method thereof and engine using hydrostatic thrust blade |
| CN107335890A (en) * | 2017-08-26 | 2017-11-10 | 安徽鼎恒再制造产业技术研究院有限公司 | Valve seat reparation ni-based self-fluxing alloy powder and its welding procedure |
| CN115351271A (en) * | 2022-08-31 | 2022-11-18 | 国家电投集团江西水电检修安装工程有限公司 | Impeller corrosion-resistant coating powder, impeller corrosion-resistant coating and preparation method thereof |
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| CN102373468A (en) * | 2010-08-23 | 2012-03-14 | 孝感市科隆实业公司 | Wide-band laser-induced hybrid cladding restoration and surface strengthening method for dies |
| CN102465294A (en) * | 2010-11-17 | 2012-05-23 | 杭州中科新松光电有限公司 | Method for carrying out laser-cladding on high-hardness nickel-based alloy material in large area |
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| CN102373468A (en) * | 2010-08-23 | 2012-03-14 | 孝感市科隆实业公司 | Wide-band laser-induced hybrid cladding restoration and surface strengthening method for dies |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106835122A (en) * | 2017-01-23 | 2017-06-13 | 四川中物红宇科技有限公司 | Cermet coating and preparation method thereof and engine using hydrostatic thrust blade |
| CN107335890A (en) * | 2017-08-26 | 2017-11-10 | 安徽鼎恒再制造产业技术研究院有限公司 | Valve seat reparation ni-based self-fluxing alloy powder and its welding procedure |
| CN107335890B (en) * | 2017-08-26 | 2019-08-27 | 安徽鼎恒再制造产业技术研究院有限公司 | Valve seat reparation ni-based self-fluxing alloy powder and its welding procedure |
| CN115351271A (en) * | 2022-08-31 | 2022-11-18 | 国家电投集团江西水电检修安装工程有限公司 | Impeller corrosion-resistant coating powder, impeller corrosion-resistant coating and preparation method thereof |
| CN115351271B (en) * | 2022-08-31 | 2024-01-26 | 国家电投集团江西水电检修安装工程有限公司 | Impeller corrosion-resistant coating powder, impeller corrosion-resistant coating and preparation method thereof |
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Application publication date: 20141217 |