CN106480380A - A kind of laser manufactures the iron(-)base powder of low-speed heave-load marine diesel engine piston annular groove - Google Patents
A kind of laser manufactures the iron(-)base powder of low-speed heave-load marine diesel engine piston annular groove Download PDFInfo
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- CN106480380A CN106480380A CN201510552335.9A CN201510552335A CN106480380A CN 106480380 A CN106480380 A CN 106480380A CN 201510552335 A CN201510552335 A CN 201510552335A CN 106480380 A CN106480380 A CN 106480380A
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- diesel engine
- base powder
- annular groove
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Abstract
A kind of laser manufactures the iron(-)base powder of low-speed heave-load marine diesel engine piston annular groove it is characterised in that described iron(-)base powder composition proportioning by weight percentage is：
C
：
0.1-0.2%
,
Cr
：
14.0-17.0%
,
Si
：
1.0-1.3%
,
Ni
：
1.4-2.0%
,
Mn
：
0.2-0.5%
,
Mo
：
0.8-1.2%
,
B
：
1.0-1.5%
, balance of
Fe
.The present invention passes through different characteristic of elements in analysis of material, design the high hardness wear-resisting material of suitable piston ring groove, higher chromium content in powder, appropriate boron and silicon and boron, nickel, molybdenum, play the effect making even tissue refine, improve hardness and the anti-wear performance of cladding layer.Meet anti-corrosion to cladding layer, wear-resisting etc. the combination property of diesel engine piston annular groove to require.
Description
Technical field
The present invention relates to a kind of laser manufactures the material of ship power part, more particularly to a kind of laser manufactures the iron(-)base powder of low-speed heave-load marine diesel engine piston annular groove.
Background technology
Diesel engine is the main source of ship power, and piston is one of main motion parts of diesel engine, is the ingredient of combustor, and it is responsible for huge task.Very big mechanical stress and thermal stress is subject, simultaneously also subject to abrasion during pistons work.The rigid residue that the abrasion of piston ring upper and lower end face is primarily due in machine oil fuel oil and the dust granules infiltrated from air form mechanical lapping on upper and lower end face, are substantially abrasive wears.For the low-speed heave-load diesel engine of heavy oil combustion, the viscosity of heavy oil is very high, has a strong impact on fuel pumping, purified treatment and atomization.Heavy oil product SO3Can speed up Hydrocarbon polymerization and tie carbon, it is difficult to be eliminated, and increases the abrasion of cylinder and piston ring.And the ash in heavy oil is also substantially many than light oil, is equivalent to abrasive material, cause to wear and tear.These abrasions if things go on like this make piston ring groove especially its lower edges form loudspeaker v notch v, have a strong impact on the sealing of piston and then the quality of the whole piston of impact.Typically can be by chrome faced mode come strengthening surface hardness, but chromium plating thinner thickness, adhesion is strong and environmental pollution is serious.
Laser melting coating refers to add the coating material of selection by way of different on the matrix by cladding, through high-energy-density laser beam irradiated heat, it is allowed to melt with matrix surface, and rapid solidification, thus form the technical process of the face coat being metallurgical binding with it in substrate surface.Advanced technology as material surface strengthening aspect in recent years, laser melting coating has the series of advantages such as cause that workpiece deformation is little, dilution rate is low, between coating and base material adhesion is strong, but the difference according to base material and desired properties, need rational selection cladding powder and melting and coating process, otherwise cladding layer occurs the defects such as pore, crackle, the serviceability of impact workpiece.
Laser melting coating recovery technique, as a kind of advanced re-manufacturing technology, has obtained rapid popularization and extensive application in recent years.
But, the special alloy powder of laser melting coating is actually rare in the market, and the alloy powder that the traditional handicraft such as surfacing, spraying is used, it is to be allocated by different proportion, and prepare required various Ni-based, cobalt-based, iron(-)base powder in the form of powder mixing machine.These hybrid alloys powder exist and such as mix that uneven, granularity difference is big, fusing point is different, composition tolerances, the coefficient of expansion not parity problem, lead in actual cladding uncontrollable crackle, pore, segregation, the defect such as performance is unstable, the machine of being difficult adds.
Therefore, research and develop new there is corrosion-proof wear ability, stable performance laser melting coating iron(-)base powder, be the key subjects in described technical field, retrieve verification through the applicant：There is no the relevant report of this respect both at home and abroad.
Content of the invention
It is an object of the invention to solving the problems referred to above that prior art exists, by Improvement repeatedly, give and there is the alloy powder being applied to piston ring groove that hardness is high, wearability is good, can on piston ring groove end face one layer of flawless of cladding, free from admixture, the wear resistant alloy powders of dense structure, the service life of piston is greatly improved.
The object of the present invention is achieved like this：A kind of laser manufactures the iron(-)base powder of low-speed heave-load marine diesel engine piston annular groove, and its material composition proportioning by weight percentage is as follows： C：0.1-0.2%, Cr：14.0-17.0%, Si：1.0-1.3%, Ni：1.4-2.0%, Mn：0.2-0.5%, Mo：0.8-1.2%, B：1.0-1.5%, balance of Fe.
The feature of this alloy powder is that iron alloy coating is close with matrix composition, and interface cohesion is firm.Chromium content in powder is higher, the hard phases such as appropriate chromium carbide, chromium boride can be formed with the carbon in powder, boron element, improve hardness and the anti-wear performance of coating, and chromium has stronger solution strengthening ability, improve the intensity of cladding layer, also can improve the corrosion resisting property of cladding layer；Add appropriate boron in the powder and silicon make powder have certain from deoxidation, slaggability, improve the wettability of liquid metal, boron also has the effect of intercrystalline strengthening simultaneously, can improve the hardness of cladding layer；The addition of nickel can increase substantially the corrosion resisting property of cladding layer additionally it is possible to crystal grain thinning, improves the intensity of cladding layer；Molybdenum, as a kind of rare earth element, can playing the effect making even tissue refine, the atomic radius of molybdenum is larger simultaneously, more serious distortion of lattice occurs after solid solution, improving the hardness of cladding layer, thus improving its anti-wear performance.By adjust composition between each element proportioning so as to get cladding layer be no mingled with, the defect such as pore and crackle, and abrasion resistance properties good it is adaptable to the laser melting coating of piston ring groove end face.
Having that the present invention is given is anti-corrosion, the laser melting coating of anti-wear performance coating iron(-)base powder, adopts 5KW CO in actual cladding operation2Laser instrument, the technological parameter of diesel engine piston annular groove end face is：Power：3000 ~ 4000W, spot diameter：3 ~ 4mm, scanning speed：400 ~ 500mm/min, overlapping rate：50%, put powder thickness：0.5-1.2mm.
The present invention has anti-corrosion, anti-wear performance laser melting coating corrosion-inhibiting coating iron-based alloy powder material, is mainly used in low-speed heave-load marine diesel engine piston annular groove.
Compared with prior art, the present invention by characteristic of elements different in analysis of material, design the high hardness wear-resisting material of suitable piston ring groove, chromium content in powder is higher, the hard phases such as appropriate chromium carbide, chromium boride can be formed with the carbon in powder, boron element, improve hardness and the anti-wear performance of coating, and chromium has stronger solution strengthening ability, improve the intensity of cladding layer, also can improve the corrosion resisting property of cladding layer；Add appropriate boron in the powder and silicon make powder have certain from deoxidation, slaggability, improve the wettability of liquid metal, boron also has the effect of intercrystalline strengthening simultaneously, can improve the hardness of cladding layer；The addition of nickel can increase substantially the corrosion resisting property of cladding layer additionally it is possible to crystal grain thinning, improves the intensity of cladding layer；Molybdenum, as a kind of rare earth element, can playing the effect making even tissue refine, the atomic radius of molybdenum is larger simultaneously, more serious distortion of lattice occurs after solid solution, improving the hardness of cladding layer, thus improving its anti-wear performance.Meet anti-corrosion to cladding layer, wear-resisting etc. the combination property of diesel engine piston annular groove to require.
Specific embodiment
Embodiment 1.
The material of piston ring groove is 42CrMo, subjects very big mechanical stress and thermal stress, simultaneously also subject to abrasion during work.The rigid residue that the abrasion of piston ring upper and lower end face is primarily due in machine oil fuel oil and the dust granules infiltrated from air form mechanical lapping on upper and lower end face, are substantially abrasive wears.These abrasions if things go on like this make piston ring groove especially its lower edges form loudspeaker v notch v, have a strong impact on the sealing of piston and then the quality of the whole piston of impact.
Use 5KW CO2Laser instrument, carries out laser melting coating to low-speed heave-load marine diesel engine piston annular groove.The mass percent of iron(-)base powder alloying element of design is.
C：0.14%；Cr：15.3%；Si：1.12%；Ni：1.81%；Mn:0.34；Mo：1.06%； B：1.24%； Fe：Surplus.
Its melting and coating process parameter is：Power：3500W, spot diameter：3mm, scanning speed：450mm/min, overlapping rate：50%, put powder thickness：0.8mm.
The present invention selects the higher iron(-)base powder of chromium content, and with the binding ability of base material more, and the carbide being formed, boride hardness are higher, can be very good to play wear-resisting effect, the cladding better performances of this powder simultaneously, the process parameters range of adaptation is wide, and cladding effect is more stable.
Example 2.
The material of piston ring groove is 42CrMo, subjects very big mechanical stress and thermal stress, simultaneously also subject to abrasion during work.The rigid residue that the abrasion of piston ring upper and lower end face is primarily due in machine oil fuel oil and the dust granules infiltrated from air form mechanical lapping on upper and lower end face, are substantially abrasive wears.These abrasions if things go on like this make piston ring groove especially its lower edges form loudspeaker v notch v, have a strong impact on the sealing of piston and then the quality of the whole piston of impact.
Use 5KW CO2Laser instrument, carries out laser melting coating to low-speed heave-load marine diesel engine piston annular groove.The mass percent of iron(-)base powder alloying element of design is.
C：0.16%, Cr：14.7%, Si：1.21%, Ni：1.90%, Mn：0.41%, Mo：0.96%, B：1.34%, balance of Fe.
Its melting and coating process parameter is：Power：4000W, spot diameter：4mm, scanning speed：500mm/min, overlapping rate：50%, put powder thickness：1.2mm.
The present invention selects the higher iron(-)base powder of chromium content, and with the binding ability of base material more, and the carbide being formed, boride hardness are higher, play wear-resisting effect well, the cladding performance of this powder is good simultaneously, and the process parameters range of adaptation is wide, and cladding effect is more stable.
Claims (3)
1. a kind of laser manufactures the iron(-)base powder of low-speed heave-load marine diesel engine piston annular groove it is characterised in that described iron(-)base powder composition proportioning by weight percentage is as follows：
C：0.1-0.2%, Cr：14.0-17.0%, Si：1.0-1.3%, Ni：1.4-2.0%,
Mn：0.2-0.5%, Mo：0.8-1.2%, B：1.0-1.5%, balance of Fe.
2. a kind of laser according to claim 1 manufactures the iron(-)base powder of low-speed heave-load marine diesel engine piston annular groove it is characterised in that described iron(-)base powder composition proportioning by weight percentage is as follows：
C：0.14%；Cr：15.3%；Si：1.12%；Ni：1.81%；Mn:0.34；Mo：1.06%； B：1.24%； Fe：Surplus.
3. a kind of laser according to claim 1 manufactures the iron(-)base powder of low-speed heave-load marine diesel engine piston annular groove it is characterised in that described iron(-)base powder composition proportioning by weight percentage is as follows：
C：0.16%, Cr：14.7%, Si：1.21%, Ni：1.90%, Mn：0.41%, Mo：0.96%, B：1.34%, balance of Fe.
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Cited By (8)
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|---|---|---|---|---|
| CN107916376A (en) * | 2017-11-27 | 2018-04-17 | 沈阳工业大学 | Powder used in a kind of laser gain material manufacture novel wear resistant stainless steel |
| CN108315732A (en) * | 2018-01-23 | 2018-07-24 | 宁波华帆金属材料科技有限公司 | A kind of self-fluxing alloyed powder |
| CN110306188A (en) * | 2019-08-12 | 2019-10-08 | 河南省煤科院耐磨技术有限公司 | A kind of hydraulic support laser melting coating special-purpose iron-base stainless steel alloy powder and its application |
| CN111607790A (en) * | 2020-06-12 | 2020-09-01 | 兰州理工大学白银新材料研究院 | Cladding agent for laser cladding and preparation method and application thereof |
| CN111945154A (en) * | 2020-08-06 | 2020-11-17 | 陕西陕北矿业有限责任公司 | Iron-based alloy powder for laser cladding and laser cladding method |
| CN112458457A (en) * | 2020-11-26 | 2021-03-09 | 上海交通大学 | Iron-based alloy powder and application thereof |
| CN113046625A (en) * | 2020-12-18 | 2021-06-29 | 西安必盛激光科技有限公司 | Alloy powder for laser cladding repair of middle cylinder of mining hydraulic stand column and repair method |
| CN114855053A (en) * | 2022-05-09 | 2022-08-05 | 西安必盛激光科技有限公司 | Alloy powder for repairing inner wall of hydraulic support oil cylinder and laser cladding method |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107916376A (en) * | 2017-11-27 | 2018-04-17 | 沈阳工业大学 | Powder used in a kind of laser gain material manufacture novel wear resistant stainless steel |
| CN107916376B (en) * | 2017-11-27 | 2020-04-10 | 沈阳工业大学 | Powder for laser additive manufacturing of wear-resistant stainless steel |
| CN108315732A (en) * | 2018-01-23 | 2018-07-24 | 宁波华帆金属材料科技有限公司 | A kind of self-fluxing alloyed powder |
| CN110306188A (en) * | 2019-08-12 | 2019-10-08 | 河南省煤科院耐磨技术有限公司 | A kind of hydraulic support laser melting coating special-purpose iron-base stainless steel alloy powder and its application |
| CN111607790A (en) * | 2020-06-12 | 2020-09-01 | 兰州理工大学白银新材料研究院 | Cladding agent for laser cladding and preparation method and application thereof |
| CN111945154A (en) * | 2020-08-06 | 2020-11-17 | 陕西陕北矿业有限责任公司 | Iron-based alloy powder for laser cladding and laser cladding method |
| CN112458457A (en) * | 2020-11-26 | 2021-03-09 | 上海交通大学 | Iron-based alloy powder and application thereof |
| CN112458457B (en) * | 2020-11-26 | 2022-04-26 | 上海交通大学 | Iron-based alloy powder and application thereof |
| CN113046625A (en) * | 2020-12-18 | 2021-06-29 | 西安必盛激光科技有限公司 | Alloy powder for laser cladding repair of middle cylinder of mining hydraulic stand column and repair method |
| CN113046625B (en) * | 2020-12-18 | 2022-04-15 | 西安必盛激光科技有限公司 | Alloy powder for laser cladding repair of middle cylinder of mining hydraulic stand column and repair method |
| CN114855053A (en) * | 2022-05-09 | 2022-08-05 | 西安必盛激光科技有限公司 | Alloy powder for repairing inner wall of hydraulic support oil cylinder and laser cladding method |
| CN114855053B (en) * | 2022-05-09 | 2023-02-14 | 西安必盛激光科技有限公司 | Alloy powder for repairing inner wall of hydraulic support oil cylinder and laser cladding method |
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Application publication date: 20170308 |