CN104805391A - Anti-crack and scratch-proof iron-based alloy coating used for thermal spraying and preparation method thereof - Google Patents
Anti-crack and scratch-proof iron-based alloy coating used for thermal spraying and preparation method thereof Download PDFInfo
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Abstract
The invention relates to an anti-crack and scratch-proof iron-based alloy coating used for thermal spraying. The coating is formed through thermal spraying of powder made of a metal material, the metal material of the coating comprises the following chemical components according to weight percentage: 4.1 to 6.5 percent of Cr, 0.33 to 0.42 percent of C, 0.8 to 2.0 percent of Si, 0.8 to 1.4 percent of Mn, 0.21 to 0.34 percent of Nb, 0.62 to 0.88 percent of Al, 0.64 to 0.77 percent of Ti, 0.28 to 0.39 percent of Co, 0.5 to 2.0 percent of Ni, and 0.47 to 0.53 percent of V, wherein the sum of the Mn and the Ni accounts for 1.2 to 3.5 percent, at least one of the Mo and the W is contained, the total content is 2 to 5 percent, lanthanide rare earth accounts for 0.51 to 0.63 percent, and the rest is Fe and inevitable impurities; the coating adopts the microscopic structure that Cr7C3 strengthening phases are spread in an austenite; the lanthanide rare earth comprises the following components in percentage by mass: 10 to 15 percent of cerium, 10 to 13 percent of terbium, 15 to 22 percent of gadolinium, 12 to 15 percent of neodymium, 7 to 14 percent of dysprosium, and the balance of lanthanum, and the sum of all the components is 100 percent. The iron-based compound spraying powder provided by the invention is relatively good in high-temperature oxidation resistance, and over oxidation during a spraying process can be avoided, therefore, internal combination compactness inside the coating after spraying is improved, moreover, after spraying, pores in the coating after spraying are moderate in size and smooth in shapes, and cracks can be reduced effectively.
Description
Technical field
The present invention relates to a kind of heat spray coating layer material and preparation method thereof, a kind of iron alloy coating scratch-resistant for the cracking resistance of thermospray and preparation method thereof, belongs to technical field of hot specifically.
Background technology
The coating applied by thermospray is used to many application known morning.Such as, in vehicular engine, the surface of the cylinder running surface of oil lubrication is particularly undertaken being coated with the quite a long time by plasma spraying, described coating especially significantly can reduce the frictional coefficient between piston ring and cylinder wall, thus significantly reduce the wearing and tearing of piston ring and cylinder, service life of aeroengine is increased, and maintenance period (such as changing oil) extends, and also makes motor performance significantly improve.
Compared with other coating, iron base heat spray coating has more excellent mechanical property, magnetic performance and corrosion resistance nature.Meanwhile, iron-based families of coatings has abundant natural resources, cheap material cost, thus causes the research boom of people.But the same with other coatings, in the test of traditional macro-mechanical property, often there is inhomogeneous deformation in iron-based coating, concentration of plastic deformation, at the shear zone of minority, shows as macroscopical fragility.This feature of iron-based coating limits its application in engineering field to a great extent.Therefore, how under the prerequisite keeping Fe-based amorphous high strength, improving Fe-based amorphous plastic deformation ability, increase toughness, is promote the realistic problem needing solution in iron-based coating application process badly.
Summary of the invention
Technical problem to be solved by this invention is, a kind of iron alloy coating scratch-resistant for the cracking resistance of thermospray and preparation method thereof is proposed, toughness reinforcing improvement can be carried out to the iron-based coating of fragility, improve the intensity of coating, guarantee that coating is scratch-resistant, ensure the corrosion resistance nature of coating, retain the high strength that it is intrinsic simultaneously, high-wearing feature feature, for large-scale engineer applied provides possibility.
The present invention solves the technical scheme of above technical problem: provide a kind of iron alloy coating scratch-resistant for the cracking resistance of thermospray, the powder that this coating is made up of metallic substance forms through thermospray, the chemical composition of its metallic substance is by weight percentage: Cr:4.1-6.5%, C:0.33-0.42%, Si:0.8-2.0%, Mn:0.8-1.4%, Nb:0.21-0.34%, Al:0.62-0.88%, Ti:0.64-0.77%, Co:0.28-0.39%, Ni:0.5-2.0%, V:0.47-0.53%, and to meet Mn and Ni sum be 1.2-3.5%, Mo, W is at least containing a kind of, its total content is 2-5%, lanthanide rare: 0.51-0.63%, all the other are Fe and inevitable impurity, its coating microstructure is the Cr7C3 strengthening phase that is scattered here and there in austenite,
The constituent mass per-cent of described lanthanide rare is: cerium: 10-15%, terbium: 10-13%, gadolinium: 15-22%, neodymium: 12-15%, dysprosium: 7-14%, and surplus is lanthanum, and above each component sum is 100%.
Further restriction technical scheme of the present invention, the aforesaid iron alloy coating scratch-resistant for the cracking resistance of thermospray, the powder that this coating is made up of metallic substance forms through thermospray, the chemical composition of its metallic substance is by weight percentage: Cr:4.1%, C:0.33%, Si:0.8%, Mn:0.8%, Nb:0.21%, Al:0.62%, Ti:0.64%, Co:0.28%, Ni:0.5%, V:0.47%, Mo, W are at least containing a kind of, and its total content is 2%, lanthanide rare: 0.51%, all the other are Fe and inevitable impurity; Its coating microstructure is the Cr7C3 strengthening phase that is scattered here and there in austenite;
The constituent mass per-cent of described lanthanide rare is: cerium: 10%, terbium: 10%, gadolinium: 15%, neodymium: 12%, dysprosium: 7%, and surplus is lanthanum, and above each component sum is 100%.
The aforesaid iron alloy coating scratch-resistant for the cracking resistance of thermospray, the powder that this coating is made up of metallic substance forms through thermospray, and the chemical composition of its metallic substance is by weight percentage: Cr:4.5%, C:0.38%, Si:1.3%, Mn:1.2%, Nb:0.24%, Al:0.68%, Ti:0.67%, Co:0.31%, Ni:1.5%, V:0.48%, Mo, W are at least containing a kind of, its total content is 3%, lanthanide rare: 0.59%, and all the other are Fe and inevitable impurity; Its coating microstructure is the Cr7C3 strengthening phase that is scattered here and there in austenite;
The constituent mass per-cent of described lanthanide rare is: cerium: 13%, terbium: 12%, gadolinium: 18%, neodymium: 14%, dysprosium: 11%, and surplus is lanthanum, and above each component sum is 100%.
The aforesaid iron alloy coating scratch-resistant for the cracking resistance of thermospray, the powder that this coating is made up of metallic substance forms through thermospray, and the chemical composition of its metallic substance is by weight percentage: Cr:6.5%, C:0.42%, Si:2.0%, Mn:1.4%, Nb:0.34%, Al:0.88%, Ti:0.77%, Co:0.39%, Ni:2.0%, V:0.53%, Mo, W are at least containing a kind of, its total content is 5%, lanthanide rare: 0.63%, and all the other are Fe and inevitable impurity; Its coating microstructure is the Cr7C3 strengthening phase that is scattered here and there in austenite;
The constituent mass per-cent of described lanthanide rare is: cerium: 15%, terbium: 13%, gadolinium: 22%, neodymium: 15%, dysprosium: 14%, and surplus is lanthanum, and above each component sum is 100%.
For a preparation method for the scratch-resistant iron alloy coating of the cracking resistance of thermospray, comprise following steps:
(1) blasting craft is adopted to carry out roughened, clean matrix surface to be sprayed;
(2) adopt aerosolization method to prepare dusty spray, according to weight percent formulated ferrous alloy, then this alloy of melting, adopts aerosolization method to prepare iron(-)base powder;
(3) in plasma spraying equipment, iron(-)base powder is loaded powder feeder, by trade union college to be sprayed on rotary tooling, spray, obtain iron-based composite coating, its microtexture take austenite as matrix, wherein disperses Cr7C3 strengthening phase.
Further, the preparation method of the aforesaid iron alloy coating scratch-resistant for the cracking resistance of thermospray, spray parameters is set to: working current≤550A; Arc voltage≤60V; Argon pressure 0.75-0.88MPa; Argon flow amount 30-42L/min; Hydrogen pressure 0.42-0.48MPa; Hydrogen flowing quantity 2.0-3.0L/min; Powder feeding rate 85-130g/min; Spray distance 110-130mm; Spray angle is 45 °-75 °.
Beneficial effect of the present invention: iron-based compound spraying powder of the present invention has good high temperature oxidation resistance, can avoid in spraying process excessively oxidated, thus the compactness that after improve spraying, coat inside combines, the rear coating mesoporosity of spraying is simultaneously of moderate size, shape is round and smooth, effectively reduce the generation of crackle, therefore, it is possible to play anti-scratch performance well.Ni containing high level in this iron-based compound spraying powder, serves stable coatings austenite phase on the one hand, improves the effect of coating toughness; Improve the corrosion resistance nature of coating on the other hand.Adopt plasma spraying coating to have good wear-and corrosion-resistant performance, be applicable to the matrix surface worked under wearing and tearing, corrosion working conditions.
Embodiment
embodiment 1
The present embodiment provides a kind of iron alloy coating scratch-resistant for the cracking resistance of thermospray, and the powder that this coating is made up of metallic substance forms through thermospray, and the chemical composition of its metallic substance is by weight percentage: Cr:4.1%, C:0.33%, Si:0.8%, Mn:0.8%, Nb:0.21%, Al:0.62%, Ti:0.64%, Co:0.28%, Ni:0.5%, V:0.47%, Mo, W are at least containing a kind of, its total content is 2%, lanthanide rare: 0.51%, and all the other are Fe and inevitable impurity; Its coating microstructure is the Cr7C3 strengthening phase that is scattered here and there in austenite;
The preparation method of the iron alloy coating scratch-resistant for the cracking resistance of thermospray of the present embodiment, comprises following steps:
(1) blasting craft is adopted to carry out roughened, clean matrix surface to be sprayed;
(2) adopt aerosolization method to prepare dusty spray, according to weight percent formulated ferrous alloy, then this alloy of melting, adopts aerosolization method to prepare iron(-)base powder;
(3) in plasma spraying equipment, iron(-)base powder is loaded powder feeder, by trade union college to be sprayed on rotary tooling, spray, obtain iron-based composite coating, its microtexture take austenite as matrix, and wherein disperse Cr7C3 strengthening phase, the spray parameters of the present embodiment is set to: working current 550A; Arc voltage 60V; Argon pressure 0.75MPa; Argon flow amount 30L/min; Hydrogen pressure 0.42MPa; Hydrogen flowing quantity 2.0L/min; Powder feeding rate 85g/min; Spray distance 110mm; Spray angle is 45 °.
embodiment 2
The present embodiment provides a kind of iron alloy coating scratch-resistant for the cracking resistance of thermospray, and the powder that this coating is made up of metallic substance forms through thermospray, and the chemical composition of its metallic substance is by weight percentage: Cr:4.5%, C:0.38%, Si:1.3%, Mn:1.2%, Nb:0.24%, Al:0.68%, Ti:0.67%, Co:0.31%, Ni:1.5%, V:0.48%, Mo, W are at least containing a kind of, its total content is 3%, lanthanide rare: 0.59%, and all the other are Fe and inevitable impurity; Its coating microstructure is the Cr7C3 strengthening phase that is scattered here and there in austenite;
The constituent mass per-cent of described lanthanide rare is: cerium: 13%, terbium: 12%, gadolinium: 18%, neodymium: 14%, dysprosium: 11%, and surplus is lanthanum, and above each component sum is 100%.
The preparation method of the iron alloy coating scratch-resistant for the cracking resistance of thermospray of the present embodiment, comprises following steps:
(1) blasting craft is adopted to carry out roughened, clean matrix surface to be sprayed;
(2) adopt aerosolization method to prepare dusty spray, according to weight percent formulated ferrous alloy, then this alloy of melting, adopts aerosolization method to prepare iron(-)base powder;
(3) in plasma spraying equipment, iron(-)base powder is loaded powder feeder, by trade union college to be sprayed on rotary tooling, spray, obtain iron-based composite coating, its microtexture take austenite as matrix, and wherein disperse Cr7C3 strengthening phase, the spray parameters of the present embodiment is set to: working current 520A; Arc voltage 50V; Argon pressure 0.78MPa; Argon flow amount 35L/min; Hydrogen pressure 0.46MPa; Hydrogen flowing quantity 2.5L/min; Powder feeding rate 110g/min; Spray distance 120mm; Spray angle is 55 °.
embodiment 3
The present embodiment provides a kind of iron alloy coating scratch-resistant for the cracking resistance of thermospray, and the powder that this coating is made up of metallic substance forms through thermospray, and the chemical composition of its metallic substance is by weight percentage: Cr:6.5%, C:0.42%, Si:2.0%, Mn:1.4%, Nb:0.34%, Al:0.88%, Ti:0.77%, Co:0.39%, Ni:2.0%, V:0.53%, Mo, W are at least containing a kind of, its total content is 5%, lanthanide rare: 0.63%, and all the other are Fe and inevitable impurity; Its coating microstructure is the Cr7C3 strengthening phase that is scattered here and there in austenite;
The constituent mass per-cent of described lanthanide rare is: cerium: 15%, terbium: 13%, gadolinium: 22%, neodymium: 15%, dysprosium: 14%, and surplus is lanthanum, and above each component sum is 100%.
The preparation method of the iron alloy coating scratch-resistant for the cracking resistance of thermospray of the present embodiment, comprises following steps:
(1) blasting craft is adopted to carry out roughened, clean matrix surface to be sprayed;
(2) adopt aerosolization method to prepare dusty spray, according to weight percent formulated ferrous alloy, then this alloy of melting, adopts aerosolization method to prepare iron(-)base powder;
(3) in plasma spraying equipment, iron(-)base powder is loaded powder feeder, by trade union college to be sprayed on rotary tooling, spray, obtain iron-based composite coating, its microtexture take austenite as matrix, and wherein disperse Cr7C3 strengthening phase, the spray parameters of the present embodiment is set to: working current 530A; Arc voltage 55V; Argon pressure 0.88MPa; Argon flow amount 42L/min; Hydrogen pressure 0.48MPa; Hydrogen flowing quantity 3.0L/min; Powder feeding rate 130g/min; Spray distance 130mm; Spray angle is 75 °.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of application claims.
Claims (6)
1. for iron alloy coating that the cracking resistance of thermospray is scratch-resistant, it is characterized in that: the powder that this coating is made up of metallic substance forms through thermospray, the chemical composition of its metallic substance is by weight percentage: Cr:4.1-6.5%, C:0.33-0.42%, Si:0.8-2.0%, Mn:0.8-1.4%, Nb:0.21-0.34%, Al:0.62-0.88%, Ti:0.64-0.77%, Co:0.28-0.39%, Ni:0.5-2.0%, V:0.47-0.53%, and to meet Mn and Ni sum be 1.2-3.5%, Mo, W is at least containing a kind of, its total content is 2-5%, lanthanide rare: 0.51-0.63%, all the other are Fe and inevitable impurity, its coating microstructure is the Cr7C3 strengthening phase that is scattered here and there in austenite,
The constituent mass per-cent of described lanthanide rare is: cerium: 10-15%, terbium: 10-13%, gadolinium: 15-22%, neodymium: 12-15%, dysprosium: 7-14%, and surplus is lanthanum, and above each component sum is 100%.
2. the iron alloy coating scratch-resistant for the cracking resistance of thermospray as claimed in claim 1, it is characterized in that: the powder that this coating is made up of metallic substance forms through thermospray, the chemical composition of its metallic substance is by weight percentage: Cr:4.1%, C:0.33%, Si:0.8%, Mn:0.8%, Nb:0.21%, Al:0.62%, Ti:0.64%, Co:0.28%, Ni:0.5%, V:0.47%, Mo, W are at least containing a kind of, its total content is 2%, lanthanide rare: 0.51%, and all the other are Fe and inevitable impurity; Its coating microstructure is the Cr7C3 strengthening phase that is scattered here and there in austenite;
The constituent mass per-cent of described lanthanide rare is: cerium: 10%, terbium: 10%, gadolinium: 15%, neodymium: 12%, dysprosium: 7%, and surplus is lanthanum, and above each component sum is 100%.
3. the iron alloy coating scratch-resistant for the cracking resistance of thermospray as claimed in claim 1, it is characterized in that: the powder that this coating is made up of metallic substance forms through thermospray, the chemical composition of its metallic substance is by weight percentage: Cr:4.5%, C:0.38%, Si:1.3%, Mn:1.2%, Nb:0.24%, Al:0.68%, Ti:0.67%, Co:0.31%, Ni:1.5%, V:0.48%, Mo, W are at least containing a kind of, its total content is 3%, lanthanide rare: 0.59%, and all the other are Fe and inevitable impurity; Its coating microstructure is the Cr7C3 strengthening phase that is scattered here and there in austenite;
The constituent mass per-cent of described lanthanide rare is: cerium: 13%, terbium: 12%, gadolinium: 18%, neodymium: 14%, dysprosium: 11%, and surplus is lanthanum, and above each component sum is 100%.
4. the iron alloy coating scratch-resistant for the cracking resistance of thermospray as claimed in claim 1, it is characterized in that: the powder that this coating is made up of metallic substance forms through thermospray, the chemical composition of its metallic substance is by weight percentage: Cr:6.5%, C:0.42%, Si:2.0%, Mn:1.4%, Nb:0.34%, Al:0.88%, Ti:0.77%, Co:0.39%, Ni:2.0%, V:0.53%, Mo, W are at least containing a kind of, its total content is 5%, lanthanide rare: 0.63%, and all the other are Fe and inevitable impurity; Its coating microstructure is the Cr7C3 strengthening phase that is scattered here and there in austenite;
The constituent mass per-cent of described lanthanide rare is: cerium: 15%, terbium: 13%, gadolinium: 22%, neodymium: 15%, dysprosium: 14%, and surplus is lanthanum, and above each component sum is 100%.
5. the preparation method of the iron alloy coating scratch-resistant for the cracking resistance of thermospray as claimed in claim 1, is characterized in that comprising following steps:
(1) blasting craft is adopted to carry out roughened, clean matrix surface to be sprayed;
(2) adopt aerosolization method to prepare dusty spray, according to weight percent formulated ferrous alloy, then this alloy of melting, adopts aerosolization method to prepare iron(-)base powder;
(3) in plasma spraying equipment, iron(-)base powder is loaded powder feeder, by trade union college to be sprayed on rotary tooling, spray, obtain iron-based composite coating, its microtexture take austenite as matrix, wherein disperses Cr7C3 strengthening phase.
6. the preparation method of the iron alloy coating scratch-resistant for the cracking resistance of thermospray as claimed in claim 5, is characterized in that: spray parameters is set to: working current≤550A; Arc voltage≤60V; Argon pressure 0.75-0.88MPa; Argon flow amount 30-42L/min; Hydrogen pressure 0.42-0.48MPa; Hydrogen flowing quantity 2.0-3.0L/min; Powder feeding rate 85-130g/min; Spray distance 110-130mm; Spray angle is 45 °-75 °.
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| CN106637192A (en) * | 2016-11-24 | 2017-05-10 | 江苏雨燕模业科技有限公司 | Automobile mould repair process with excellent repair effect |
| CN106676431A (en) * | 2015-11-06 | 2017-05-17 | 通用汽车环球科技运作有限责任公司 | Alloy composition for thermal spray application |
| CN106756624A (en) * | 2016-12-14 | 2017-05-31 | 苏州纽东精密制造科技有限公司 | A kind of auto parts machinery surface corrosion resistant metal coating |
| CN109023218A (en) * | 2018-07-23 | 2018-12-18 | 刘威 | A kind of plasma surface cladding preparation method based on nanotechnology |
| CN109312438A (en) * | 2016-03-22 | 2019-02-05 | 思高博塔公司 | Fully readable hot-spraying coating |
| CN114032490A (en) * | 2021-09-30 | 2022-02-11 | 福建省宁德恒茂节能科技有限公司 | High-temperature corrosion-resistant wear-resistant electric arc spraying powder core wire for AOD furnace vaporization cooling boiler |
| US11939646B2 (en) | 2018-10-26 | 2024-03-26 | Oerlikon Metco (Us) Inc. | Corrosion and wear resistant nickel based alloys |
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| US11939646B2 (en) | 2018-10-26 | 2024-03-26 | Oerlikon Metco (Us) Inc. | Corrosion and wear resistant nickel based alloys |
| CN114032490A (en) * | 2021-09-30 | 2022-02-11 | 福建省宁德恒茂节能科技有限公司 | High-temperature corrosion-resistant wear-resistant electric arc spraying powder core wire for AOD furnace vaporization cooling boiler |
| CN114032490B (en) * | 2021-09-30 | 2023-11-24 | 福建省宁德恒茂节能科技有限公司 | High-temperature corrosion-resistant wear-resistant electric arc spraying powder core wire for AOD furnace vaporization cooling boiler |
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