CN102021564A - Anticorrosive coating nickel-based alloy powder for laser cladding - Google Patents
Anticorrosive coating nickel-based alloy powder for laser cladding Download PDFInfo
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- CN102021564A CN102021564A CN2009101874026A CN200910187402A CN102021564A CN 102021564 A CN102021564 A CN 102021564A CN 2009101874026 A CN2009101874026 A CN 2009101874026A CN 200910187402 A CN200910187402 A CN 200910187402A CN 102021564 A CN102021564 A CN 102021564A
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Abstract
An anticorrosive coating nickel-based alloy powder for laser cladding with anticorrosive capacity and stable performance comprises Cr, Mo, Ni, Y2O3 and Hf; the anticorrosive coating nickel-based alloy powder for laser cladding further comprises W, Si, Mn, Co and Fe, wherein the percentages by weight of each constituents are: 12-18% of Cr; 11-17% of Mo; 2-5% of W; 1-3% of Co; 0.3-1% of Mn; 0.5-1% of Fe; 0.1-0.3% of Si; 0.1-0.3% of Y2O3; 0.1-0.3% of Hf, and the balance of Ni. In the present invention, crack resistance, formability, process stability and constituent uniformity of the alloy powder in laser cladding layer are improved; combination property requirements of repaired parts to corrosion resistance, abrasion resistance, fatigue resistance and moderate hardness of cladding layer are satisfied.
Description
Technical field:
The present invention relates to a kind of alloy powder material that is suitable for laser melting coating, particularly relate to a kind of laser melting coating corrosion protection coating Co-based alloy powder antiseptic power, stable performance that has, belong to C23C24/10 (2006.01) the I technical field in the International Patent Classification (IPC).
Background technology:
At present, corrosion protection coating both domestic and external adopts traditional technologys such as spraying, surfacing to make more, and the corrosion protection coating that these traditional technologys make has some problems that are difficult to overcome.Such as: preservative coat actual work ergosphere is very thin; Make defective such as easily produce pore in the coating procedure, be mingled with; Coating and mother metal bonding surface are non-metallurgical binding, and coating is prone to problem such as come off.Adopt laser melting and coating technique to make corrosion protection coating and then can effectively overcome the above problems, and greatly reduce the processing condition requirement of making corrosion protection coating, reduced cost simultaneously.
Laser melting coating along with improving constantly of laser power and stability, has obtained rapid popularization and widespread use as a kind of advanced person's re-manufacturing technology.Laser melting coating is to obtain and the firm metallurgical binding of matrix in the metallic surface, and the advanced re-manufacturing technology 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 senior in a large number, high performance integral material, save noble metal, reduce the component cost.Laser melting coating has solved many ordinary methods and has been difficult to the problem that processing maybe can't be processed, and making for product provides a kind of technology uniqueness, advanced effective means again.
But, the powdered alloy of laser melting coating special use in the market is actually rare, and the employed powdered alloys of traditional technology such as surfacing, spraying are allocated by different ratios, and with required various Ni-based, the cobalt-based of the form of powder mixing machine preparation, iron(-)base powder.That these hybrid alloys powder exist is inhomogeneous such as mixing, granularity difference is big, 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 defectives such as machine adds.
People carry out having obtained some progress aspect the required alloy powder material of equipment unit reparation at the research and utilization laser melting and coating technique in recent years, for example,
Publication number is " a kind of powdery alloy processing material in site by movable laser smelt-coating process " that the Chinese invention patent application of CN1854317 provides, this alloy powder material utilizes following elemental composition to strengthen nickel-base alloy: Cr, W, Mo, Al, Ti, Co, can also add Co, C, N, Nb, Cu, B, Si and trace rare-earth element, wherein, rare earth element can be Ce, Y, Hf.
Publication number is " a kind of high-hardness stainless steel alloy powder for laser remelted and the preparation technology " that the Chinese invention patent application of CN101381868 provides, and each composition weight percent of this powdered alloy is: C:0.5-0.8%; Cr:18-24%; Ni:11-17%; B:2.0-5.5%; Si:2.0-6.0%; Mo:4-9%; CeO
2: 1-5%; The Fe surplus.The preparation technology of powdered alloy comprises: batching, melting, slag making and deoxidation, powder by atomization, powder collection and composition detection, six steps of screening.
Publication number is " the high hard nothing of laser melting coating is split ferrous alloy special metals powder " that the Chinese invention patent application of CN101381869 provides, the prescription of this special metals powder, weight percentage: carbon (C): 0.3-0.5; Silicon (Si): 1.2-2.0; Boron (B): 0.4-1.0; Nickel (Ni): 1.5-2.5; Chromium (Cr): 1.0-1.5; Manganese (Mn): 1.0-1.5; Molybdenum (Mo): 1.5-2.5; Vanadium (V): 0.15-0.7; Niobium (Nb): the 0.15-0.7 surplus is iron (Fe), and its weight sum is 100%.
Publication number is " a kind of laser cladding Co-based alloy powder for conductor roll " that the Chinese invention patent application of CN101187022 provides, and the weight percent of the chemical ingredients of this powdered alloy is: Cr:24～30%; W:6～10%; Mo:3～6%; Ni:6～12%; Fe:2～10%; Mn:0.5～2%; Si:0.2～2%; V:0.1～0.6%; B:0.3～1.5%; C:0.5～2.5%; Y
2O
3: 0～0.5%; Hf:0～0.5%; La
2O
3: 0～0.5%; Ce:0～0.5%; Surplus is Co.
Though these powdered alloys that are used for laser melting coating that technique scheme provides can be obtained certain technique effect on the specific equipment unit of reparation, but owing to have self technology characteristics, can't satisfy and be applicable to the processing requirement of other specific base material laser melting coating, particularly can not satisfy the requirement that also will satisfy in splitting resistance, formability, technology stability and the homogeneity of ingredients of powdered alloy in laser cladding layer the antiseptic property of cladding layer.
Therefore, researching and developing laser melting coating corrosion protection coating Co-based alloy powder antiseptic power, stable performance that has that makes new advances, is the key subjects in the described technical field, retrieves verification through the applicant: the relevant report of still not having this respect both at home and abroad.
Summary of the invention:
The object of the present invention is to provide a kind of laser melting coating corrosion protection coating Co-based alloy powder antiseptic power, stable performance that has, to be used to the adopting method of laser melting coating to make corrosion protection coating.This Co-based alloy powder is on existing NI-CR-MO alloy basis, adds trace rare-earth element Y at least
2O
3Carry out the matrix grain-boundary strengthening with a kind of in the Hf element, a kind of alloy substrate that carries out that particularly also adds at least in W, Co, Si, the Mn element is strengthened, improved splitting resistance, formability, technology stability and the homogeneity of ingredients of powdered alloy in laser cladding layer thereby solve also, satisfied that remanufactured component is anti-corrosion, wear-resisting to cladding layer, the over-all properties requirement of antifatigue and moderate hardness etc.
The technical scheme that the present invention provides is: this corrosion protection coating Co-based alloy powder of laser melting coating with antiseptic power, stable performance, its composition includes Cr, Mo, Ni, Y
2O
3, Hf, be characterized in also including W, Si, Mn, Co, Fe, wherein (mass percent) of each component is:
Cr:12～18%; Mo:11～17%; W:2～5%; Co:1～3%; Mn:0.3～1%; Fe:0.5～1%; Si:0.1～0.3%; Y
2O
3: 0.1～0.3%; Hf:0.1～0.3%; Ni: surplus.
The present invention is by a large amount of tests and creationary work, selected alloy substrate strengthening element, grain-boundary strengthening element and dispersoid particle material, and the preferred degree of each component, by multiple reinforcement means, the reinforced alloys matrix has improved the crystal boundary quality again, make alloy obtain good comprehensive performances, thereby realized that alloy when having moderate 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 that remanufactured component is anti-corrosion, wear-resisting to cladding layer, the over-all properties requirement of antifatigue and moderate hardness etc.The scope of application of this nickel-base alloy powder powder material is bigger, and the component of 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.
Laser melting coating antiseptic power, stable performance that has that the present invention provides prepares by operations such as vacuum melting, vacuum aerosolization, screenings meticulously with the corrosion protection coating Co-based alloy powder, and granularity is-the 100+270 order.
The present invention provides has laser melting coating corrosion protection coating Co-based alloy powder antiseptic power, stable performance, adopts 2000～5000W continuous CO that flows in actual cladding operation
2Laser apparatus, on the component of materials such as carbon steel, structure iron, quenched and tempered steel and stainless steel, the melting and coating process parameter of using described powdered material is: power: 1800～3800W, focal length: 320～400mm, spot diameter: 3～6mm, sweep velocity: 240～600mm/min puts powder thickness: 0.3～1mm.
The present invention has laser melting coating antiseptic power, stable performance corrosion protection coating nickel-base alloy powder powder material, is mainly used in the laser melting coating corrosion protection coating of boi1er tube, PTA offgas duct.
Compared with prior art, the invention has the beneficial effects as follows: be on the NI-CR-MO alloy basis, add alloy substrate strengthening element, grain-boundary strengthening element and dispersoid particle material, and adjust the degree of each element.By multiple reinforcement means, the reinforced alloys matrix has improved the crystal boundary quality again, makes alloy obtain good comprehensive performances.Thereby realized that alloy when having moderate 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 that remanufactured component is anti-corrosion, wear-resisting to cladding layer, the over-all properties requirement of antifatigue and moderate hardness etc.The scope of application of this powdered material is bigger, and the component of 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:
Example 1:
The mother metal that present embodiment is selected for use is a PTA offgas duct tube wall.Tube wall surface waterproof abrasive paper ground finish, surface roughness Ra=0.2 μ m cleans up with acetone before the cladding.The chemical ingredients of the Co-based alloy powder that adopts is: Cr:12%; Mo:11%; W:2%; Co:1%; Mn:0.3%; Fe:0.5%; Si:0.1%; Y
2O
3: 0.1%; Hf:0.1%; Ni: surplus.Adopt the CO2 laser apparatus, selected laser cladding technological parameter is: power: 1800～3800W, and focal length: 320～400mm, spot diameter: 3～6mm, sweep velocity: 240～600mm/min puts powder thickness: 0.3～1mm.
Through laser melting coating, the preservative coat thickness that obtains about 1mm, the preservative coat surfacing, defectives such as flawless, pore, preservative coat and mother metal are combined into metallurgical binding, antiseptic property is good.
Example 2:
The mother metal that present embodiment is selected for use is a stainless steel work-piece.Workpiece surface waterproof abrasive paper ground finish, surface roughness Ra=0.2 μ m cleans up with acetone before the cladding.The chemical ingredients of the Co-based alloy powder that adopts is: Cr:13%; Mo:12%; W:3%; Co:2%; Mn:0.4%; Fe:0.6%; Si:0.2%; Y
2O
3: 0.2%; Hf:0.2%; Ni: surplus.Adopt the CO2 laser apparatus, selected laser cladding technological parameter is: power: 1800～3800W, and focal length: 320～400mm, spot diameter: 3～6mm, sweep velocity: 240～600mm/min puts powder thickness: 0.3～1mm.
Through laser melting coating, the preservative coat thickness that obtains about 1mm, the preservative coat surfacing, defectives such as flawless, pore, preservative coat and mother metal are metallurgical binding, antiseptic property is good.
Claims (3)
1. laser melting coating corrosion protection coating Co-based alloy powder, its composition includes Cr, Mo, Ni, Y
2O
3, Hf, it is characterized in that also including W, Si, Mn, Co, Fe, wherein (mass percent) of each component is:
Cr:12～18%; Mo:11～17%; W:2～5%; Co:1～3%; Mn:0.3～1%; Fe:0.5～1%; Si:0.1～0.3%; Y
2O
3: 0.1～0.3%; Hf:0.1～0.3%; Ni: surplus.
2. laser melting coating corrosion protection coating Co-based alloy powder according to claim 1 is characterized in that the mass percent of each component of powdered alloy is preferably:
Cr:12%; Mo:11%; W:2%; Co:1%; Mn:0.3%; Fe:0.5%; Si:0.1%; Y
2O
3: 0.1%; Hf:0.1%; Ni: surplus.
3. laser melting coating corrosion protection coating Co-based alloy powder according to claim 1 is characterized in that the mass percent of each component of powdered alloy is preferably:
Cr:13%; Mo:12%; W:3%; Co:2%; Mn:0.4%; Fe:0.6%; Si:0.2%; Y
2O
3: 0.2%; Hf:0.2%; Ni: surplus.
Priority Applications (1)
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|---|---|---|---|
| CN2009101874026A CN102021564A (en) | 2009-09-17 | 2009-09-17 | Anticorrosive coating nickel-based alloy powder for laser cladding |
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|---|---|---|---|
| CN2009101874026A CN102021564A (en) | 2009-09-17 | 2009-09-17 | Anticorrosive coating nickel-based alloy powder for laser cladding |
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| CN102021564A true CN102021564A (en) | 2011-04-20 |
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| CN102912188A (en) * | 2012-11-15 | 2013-02-06 | 江苏新亚特钢锻造有限公司 | Laser cladding nickel-based alloy powder and preparation method thereof |
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| CN103350224A (en) * | 2013-06-18 | 2013-10-16 | 江苏和昊激光科技有限公司 | Special nickel metal ceramal powder for laser cladding of crankshaft |
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Application publication date: 20110420 |