CN102021558A - Alloy powder for circulating fluidized bed boiler water wall tube laser cladded coating - Google Patents
Alloy powder for circulating fluidized bed boiler water wall tube laser cladded coating Download PDFInfo
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- CN102021558A CN102021558A CN2009101872919A CN200910187291A CN102021558A CN 102021558 A CN102021558 A CN 102021558A CN 2009101872919 A CN2009101872919 A CN 2009101872919A CN 200910187291 A CN200910187291 A CN 200910187291A CN 102021558 A CN102021558 A CN 102021558A
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- fluidized bed
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Abstract
The invention discloses alloy powder for a circulating fluidized bed boiler water wall tube laser cladded coating. The powder comprises the following components in percentage by mass: 1.0 to 1.6 percent of C, 28 to 34 percent of Cr, 2 to 5 percent of Ni, 3 to 8 percent of W, 0.2 to 0.5 percent of Mn, 1.0 to 1.4 percent of Si, 0.02 to 0.06 percent of B, 0.05 to 0.10 percent of Zr, 0.02 to 0.06 percent of Ce and the balance of Co. The powder is cladded on the surface of the water wall tube by laser to form the cobalt-base alloy coating with relatively high hardness, oxidation resistance, corrosion resistance, erosion wear resistance and excellent cladding performance. Therefore, the technical problem on corrosion resistance and wear resistance of a circulating fluidized bed boiler water wall tube is solved.
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 powdered alloy that is used for circulating fluidized bed boiler water-cooling wall pipe laser cladding coating, belong to C23C24/10 (2006.01) the I technical field in the International Patent Classification (IPC).
Background technology:
Circular fluid bed is the novel furnace that grows up on the basis of bubbling fluidized bed boiler technology, Combustion technology of circulating fluidized is the high-efficiency cleaning combustion technology that develops rapidly nearly decades, it is good especially to have fuel tolerance, the efficiency of combustion height, the gas pollutant discharging is low, advantages such as the big and lime-ash of load regulation range can fully utilize, this technology is at the station boiler of countries in the world, Industrial Boiler and offal treatment utilization wait each field all to obtain widely and use, and particularly burning inferior coal and resinous shale aspect show the competitive power stronger than other boilers.Closely about ten years, Combustion technology of circulating fluidized is in China's fast development, China become have Properties of CFB at most, total evaporation is world-class country.
Along with the fast development of circular fluid bed, accumulated abundant design, manufacturing, installation, debugging and service experience, but also exposed some problems.Topmost problem is: the wearing and tearing of boiler surface, booster; Fire-resistant abrasionproof liner weares and teares, ftractures, comes off or the like.Because the mobile of high magnification circulating ash makes the interior wearing and tearing of fluidized-bed combustion boiler stove very serious, the wear problem of circular fluid bed is the key factor of puzzlement circular fluid bed technical development, how wear problem solves, and is directly connected to the Design of CFB Boiler success or not.Adapter bonnet is adopted in the water wall design around the bottom, combustion chamber, there is the eddy flow district in this place, and the surface is that the most serious position of wearing and tearing takes place, and has directly influenced the work-ing life of water wall tube, finally cause the reduction of whole boiler service efficiency, cause bigger financial loss to power plant.
Laser melting coating is emerging in recent years high-tech processing technology, as a kind of advanced person's re-manufacturing technology, 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 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 and coating technique has solved the insurmountable material selection limitation of traditional repair method such as vibration weldering, argon arc welding, spraying, coating, technological process thermal stresses, thermal distortion, material grains is thick, the body material bonding strength is difficult to guarantee contradiction, for product is made and the reparation of the component that lost efficacy provides a kind of new approach again.
Adopt the laser melting coating re-manufacturing technology, select suitable resistance to oxidation to corrode wear-resistant Co-based alloy powder, just can successfully repair the circulating fluidized bed boiler water-cooling wall pipe of serious wear, make its recovery and improve functions of use, yet can key issue be seek or provide the needed suitable alloy powder material of laser melting coating.
At present, there is not the alloy powder material of laser melting coating special use to sell on the domestic and international market, majority is the metal-powder that adopts thermospray or surfacing to use, or on existing metal-powder basis by the heterogeneity proportioning, take the powder mixing machine mode to prepare the required alloy powder material of laser melting coating.
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 repair still exist such as crackle on the specific installation parts such, be mingled with such as the circulating fluidized bed boiler water-cooling wall pipe, defectives such as pore, uneven components, unstable properties.
On this specific installation parts of picture circulating fluidized bed boiler water-cooling wall pipe, can adopt laser melting and coating process to carry out the reparation of flawless, pore-free defective and homogeneous, can key be make the powdered alloy that is suitable for laser melting coating.Retrieve 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 the powdered alloy that is used for circulating fluidized bed boiler water-cooling wall pipe laser cladding coating that a kind of hardness is higher, anti-oxidant, corrosion-resistant, abrasion resistance properties is stable.This Co-based alloy powder is on existing cobalt-chromium-tungsten alloy powder basis, carry out matrix grain refinement and grain-boundary strengthening by adding trace rare-earth element Hf and element Zr, particularly carry out alloy substrate by interpolation C, Si, elements such as B, Ni and strengthen, formation is suitable for the laser melting coating powdered material.This Co-based alloy powder by laser processing with its cladding on the water wall tube surface, form higher, anti-oxidant, corrosion-resistant, the anti-erosive wear of hardness, have the Co-based alloy coating of superior cladding performance, thereby solved the technical barrier of circulating fluidized bed boiler water-cooling wall pipe corrosion resistant antiwear.
The technical scheme that the present invention provides is: the powdered alloy that is used for circulating fluidized bed boiler water-cooling wall pipe laser cladding coating, its composition includes Cr, W, Co, Zr, Ce, be characterized in also including C, Si, Mn, B, Ni, wherein (mass percent) of each component is:
C：1.0～1.6％；Cr：28～34％；Ni：2～5％；W：3～8％；
Mn：0.2～0.5％；Si：1.0～1.4％；B：0.02～0.06％；Zr：0.05～0.10％；
Ce:0.02～0.06%; Co: surplus.
The present invention is by a large amount of tests and creationary work, selected alloy substrate strengthening element, grain refining grain-boundary strengthening element, and the preferred degree of each component, make powdered alloy obtain superior over-all properties, realized that particularly powdered alloy is when having higher hardness and intensity, reduced alloy melting point again, increased anti-oxidant, corrosion-resistant and anti-erosive wear performance, fundamentally solve and improved the splitting resistance of powdered alloy in cladding layer, formability, technology stability and homogeneity of ingredients have satisfied the high temperature resistant of circulating fluidized bed boiler water-cooling wall pipe laser cladding coating, corrosion-resistant, the property requirement of anti-erosive wear and higher-strength hardness etc.
The powdered alloy that is used for circulating fluidized bed boiler water-cooling wall pipe laser cladding coating that the present invention provides is by the preparation meticulously of operations such as vacuum melting, vacuum aerosolization, screening, and granularity is-the 100+270 order.
The powdered alloy that is used for circulating fluidized bed boiler water-cooling wall pipe laser cladding coating that the present invention provides adopts 2000～5000W continuous CO that flows in actual cladding operation
2Laser apparatus, the processing parameter of the described powdered material of cladding is on the water wall tube surface: power: 2500～4500W, focal length: 300～400mm, spot diameter: 3～6mm, sweep velocity: 240～400mm/min puts powder thickness: 0.3～0.8mm.
Compared with prior art, the invention has the beneficial effects as follows:
1. the powdered alloy that is used for circulating fluidized bed boiler water-cooling wall pipe laser cladding coating is on the cobalt-chromium-tungsten alloy basis, adds alloy substrate strengthening element, grain refining and grain-boundary strengthening element, and adjusts 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 is when having higher hardness and intensity, reduced alloy melting point again, anti-oxidant, wear-resisting, corrosion resisting property have been increased, fundamentally solve and improved splitting resistance, formability, technology stability and the homogeneity of ingredients of powdered alloy in laser cladding layer, satisfied water wall tube and should have anti-oxidant, anti-corrosion, wear-resisting and over-all properties requirements such as higher hardness and intensity coating.
2. this alloy powder material suitable water cold wall pipe laser melting coating, by increasing this coated material, boiler water-wall tube surface corrosion resistance wear resisting property significantly improves, solved the difficult problem that the circulating fluidized bed boiler water-cooling wall plumber makes to require under the environment corrosion resistant antiwear, successfully repair the water wall tube that water wall tube after the inefficacy or manufacturing have the corrosion resistant antiwear performance for power industry a kind of effective, economic and practical convenient method, economic benefit and obvious social benefit are provided.
Embodiment:
Example 1:
5000W CO with the cladding stable performance
2Laser apparatus is gone up the Co-based alloy powder of laser melting coating design at circulating fluidized bed boiler water-cooling wall pipe (trade mark 20g), constitutes protective coating.The mass percent of alloying element is: C:1.1%; Cr:30%; Ni:2.6%; W:3.8%; Mn:0.25%; Si:1.1%; B:0.03%; Zr:0.06; Ce:0.03%; Co: surplus.
Its melting and coating process parameter is: power: 2500～4500W, and focal length: 300～4400mm, spot diameter: 3～46mm, sweep velocity: 240～4400mm/min puts powder thickness: 0.3～40.8mm.
Example 2:
5000W CO with the cladding stable performance
2Laser apparatus is gone up the Co-based alloy powder of laser melting coating design at circulating fluidized bed boiler water-cooling wall pipe (trade mark 20g), constitutes protective coating.The mass percent of alloying element is: C:1.2%; Cr:31.5%; Ni:3.0%; W:4.4%; Mn:0.35%; Si:1.3%; B:0.04%; Zr:0.08; Ce:0.03%; Co: surplus.
Its melting and coating process parameter is: power: 2500～4500W, and focal length: 300～4400mm, spot diameter: 3～46mm, sweep velocity: 240～4400mm/min puts powder thickness: 0.3～40.8mm.
Example 3:
5000W CO with the cladding stable performance
2Laser apparatus is gone up the Co-based alloy powder of laser melting coating design at circulating fluidized bed boiler water-cooling wall pipe (trade mark 20g), constitutes protective coating.The mass percent of alloying element is: C:1.3%; Cr:33%; Ni:2.6%; W:4.8%; Mn:0.3%; Si:1.4%; B:0.03%; Zr:0.08; Ce:0.04%; Co: surplus.
Its melting and coating process parameter is: power: 2500～4500W, and focal length: 300～4400mm, spot diameter: 3～46mm, sweep velocity: 240～4400mm/min puts powder thickness: 0.3～40.8mm.
Claims (4)
1. powdered alloy that is used for circulating fluidized bed boiler water-cooling wall pipe laser cladding coating, its composition includes Cr, W, Co, Zr, Ce, it is characterized in that also including C, Si, Mn, B, Ni, and wherein each component (mass percent) is:
C：1.0～1.6％；Cr：28～34％；Ni：2～5％；W：3～8％；
Mn：0.2～0.5％；Si：1.0～1.4％；B：0.02～0.06％；
Zr:0.05～0.10%; Ce:0.02～0.06%; Co: surplus.
2. the powdered alloy that is used for circulating fluidized bed boiler water-cooling wall pipe laser cladding coating according to claim 1 is characterized in that the mass percent of each component of powdered alloy composition is preferably:
C:1.1%; Cr:30%; Ni:2.6%; W:3.8%; Mn:0.25%; Si:1.1%; B:0.03%; Zr:0.06; Ce:0.03%; Co: surplus.
3. the powdered alloy that is used for circulating fluidized bed boiler water-cooling wall pipe laser cladding coating according to claim 1 is characterized in that the mass percent of each component of powdered alloy composition is preferably:
C:1.2%; Cr:31.5%; Ni:3.0%; W:4.4%; Mn:0.35%; Si:1.3%; B:0.04%; Zr:0.08; Ce:0.03%; Co: surplus.
4. the powdered alloy that is used for circulating fluidized bed boiler water-cooling wall pipe laser cladding coating according to claim 1 is characterized in that the mass percent of each component of powdered alloy composition is preferably:
C:1.3%; Cr:33%; Ni:2.6%; W:4.8%; Mn:0.3%; Si:1.4%; B:0.03%; Zr:0.08; Ce:0.04%; Co: surplus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101872919A CN102021558B (en) | 2009-09-09 | 2009-09-09 | Alloy powder for circulating fluidized bed boiler water wall tube laser cladded coating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101872919A CN102021558B (en) | 2009-09-09 | 2009-09-09 | Alloy powder for circulating fluidized bed boiler water wall tube laser cladded coating |
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| CN102021558A true CN102021558A (en) | 2011-04-20 |
| CN102021558B CN102021558B (en) | 2012-07-11 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102220580A (en) * | 2011-06-02 | 2011-10-19 | 沈阳大陆激光技术有限公司 | Special cobalt-based wear-resistant alloy powder for laser remanufacture of drilling jar |
| CN102912189A (en) * | 2012-11-15 | 2013-02-06 | 江苏新亚特钢锻造有限公司 | Laser-cladding cobalt-based alloy powder and method for preparing same |
| CN103266254A (en) * | 2013-05-31 | 2013-08-28 | 滁州市昊宇滑动轴承有限公司 | Wear-resistant alloy |
| CN104195546A (en) * | 2014-08-26 | 2014-12-10 | 浙江瑞莱士机械有限公司 | High-hardness cobalt-based alloy powder for laser cladding and preparation technology of high-hardness cobalt-based alloy powder for laser cladding |
| CN104263999A (en) * | 2014-10-11 | 2015-01-07 | 上海大学兴化特种不锈钢研究院 | Novel high-plasticity medical cobalt-based alloy |
| CN108265288A (en) * | 2017-12-22 | 2018-07-10 | 北京机科国创轻量化科学研究院有限公司 | A kind of Co-based alloy powder for superelevation rate laser melting coating |
| CN108977804A (en) * | 2018-07-06 | 2018-12-11 | 武汉北方新创环保科技发展有限公司 | A kind of boiler water wall multiple tube and preparation method thereof |
| CN110238383A (en) * | 2019-07-29 | 2019-09-17 | 常山县双明轴承有限公司 | Mould steel laser melting coating is remanufactured with alloy powder and preparation method thereof |
| CN110732800A (en) * | 2019-10-25 | 2020-01-31 | 神华神东煤炭集团有限责任公司 | Iron-based alloy composition for repairing middle tank and repairing method of middle tank |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1011984B (en) * | 1984-12-04 | 1991-03-13 | 通用电气公司 | Cobalt-base superalloy and cast and welded industrial gas turbine component thereof |
| DE19845638C1 (en) * | 1998-10-05 | 2000-04-20 | Winkelstroeter Dentaurum | Use of a carbon-free cobalt alloy, containing chromium, molybdenum, silicon, nitrogen and group Vb elements, for dental braces, pattern cast parts, superstructures and laser welded cast dental skeletons |
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2009
- 2009-09-09 CN CN2009101872919A patent/CN102021558B/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102220580A (en) * | 2011-06-02 | 2011-10-19 | 沈阳大陆激光技术有限公司 | Special cobalt-based wear-resistant alloy powder for laser remanufacture of drilling jar |
| CN102220580B (en) * | 2011-06-02 | 2012-11-07 | 沈阳大陆激光技术有限公司 | Special cobalt-based wear-resistant alloy powder for laser remanufacture of drilling jar |
| CN102912189A (en) * | 2012-11-15 | 2013-02-06 | 江苏新亚特钢锻造有限公司 | Laser-cladding cobalt-based alloy powder and method for preparing same |
| CN103266254A (en) * | 2013-05-31 | 2013-08-28 | 滁州市昊宇滑动轴承有限公司 | Wear-resistant alloy |
| CN103266254B (en) * | 2013-05-31 | 2015-08-05 | 滁州市昊宇滑动轴承有限公司 | Wear resistant alloy |
| CN104195546A (en) * | 2014-08-26 | 2014-12-10 | 浙江瑞莱士机械有限公司 | High-hardness cobalt-based alloy powder for laser cladding and preparation technology of high-hardness cobalt-based alloy powder for laser cladding |
| CN104263999A (en) * | 2014-10-11 | 2015-01-07 | 上海大学兴化特种不锈钢研究院 | Novel high-plasticity medical cobalt-based alloy |
| CN108265288A (en) * | 2017-12-22 | 2018-07-10 | 北京机科国创轻量化科学研究院有限公司 | A kind of Co-based alloy powder for superelevation rate laser melting coating |
| CN108977804A (en) * | 2018-07-06 | 2018-12-11 | 武汉北方新创环保科技发展有限公司 | A kind of boiler water wall multiple tube and preparation method thereof |
| CN110238383A (en) * | 2019-07-29 | 2019-09-17 | 常山县双明轴承有限公司 | Mould steel laser melting coating is remanufactured with alloy powder and preparation method thereof |
| CN110732800A (en) * | 2019-10-25 | 2020-01-31 | 神华神东煤炭集团有限责任公司 | Iron-based alloy composition for repairing middle tank and repairing method of middle tank |
| CN110732800B (en) * | 2019-10-25 | 2021-09-03 | 神华神东煤炭集团有限责任公司 | Iron-based alloy composition for repairing middle tank and repairing method of middle tank |
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|---|---|
| CN102021558B (en) | 2012-07-11 |
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Effective date of registration: 20160905 Address after: 200941, A-171, room 1, 1758 Hong Kong Road, Nanhui new town, Shanghai, Pudong New Area Patentee after: SHANGHAI DALU TIANRUI LASER SURFACE ENGINEERING CO.,LTD. Address before: 110136 Shenyang, Shenbei New Area Province Economic Development Zone, justice, Shen North Road, No. 29, No. Patentee before: Shenyang Dalu Laser Technology Co.,Ltd. |
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