CN104789916A - Oxidation-resistant ferrous alloy coating for thermal spraying and preparation method thereof - Google Patents
Oxidation-resistant ferrous alloy coating for thermal spraying and preparation method thereof Download PDFInfo
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- CN104789916A CN104789916A CN201510190421.XA CN201510190421A CN104789916A CN 104789916 A CN104789916 A CN 104789916A CN 201510190421 A CN201510190421 A CN 201510190421A CN 104789916 A CN104789916 A CN 104789916A
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Abstract
The invention relates to an oxidation-resistant ferrous alloy coating for thermal spraying. The coating is prepared from coating powder made of a metal material, and the metal material comprises the following chemical components in percentage by weight: 4.6-5.3 percent of Cr, 0.36-0.45 percent of C, 0.8-2.0 percent of Si, 1.5-2.4 percent of Mn, 0.26-0.37 percent of Cu, 0.49-0.61percent of Sn, 0.62-0.88 percent of Al, 0.5-1.7 percent of Ni, 3.2-4.8 percent of at least one of Mo and W, 0.53-0.75 percent of lanthanides and the balance of Fe and inevitable impurities, wherein the sum of the weight percentage of Mn and Ni is 2.2-4.2 percent; the microstructure of the coating is as follows: Cr7C3 strengthening phase is dispersed into austenite; the lanthanides comprise the following ingredients in percentage by weight: 11-23 percent of Ce, 4-9 percent of Tb, 13-17 percent of Gd, 17-21 percent of Pr and the balance of La, and the sum of the weight percentage of the ingredients is 100 percent. The ferrous compound spraying powder has better high temperature oxidation resistance and can avoid over oxidation in the spraying process, so that the compactness of internal combination of the coating is improved. Meanwhile, after spraying, the pore size in the coating is moderate, the pore shape is smooth, and the generation of cracks is effectively reduced, so that the oil storage function of a cylinder body can be well played.
Description
Technical field
The present invention relates to a kind of heat spray coating layer material and preparation method thereof, a kind of anti-oxidant iron alloy coating for 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, propose a kind of anti-oxidant iron alloy coating for thermospray and preparation method thereof, toughness reinforcing improvement can be carried out to the iron-based coating of fragility, 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 oxidation resistant iron alloy coating for thermospray, the coating end that this coating is made up of metallic substance, the chemical composition of its metallic substance is by weight percentage: Cr:4.6-5.3%, C:0.36-0.45%, Si:0.8-2.0%, Mn:1.5-2.4%, Cu:0.26-0.37%, Sn:0.49-0.61%, Al:0.62-0.88%, Ni:0.5-1.7%, and to meet Mn and Ni sum be 2.2-4.2%, Mo, W is at least containing a kind of, its total content is 3.2-4.8%, lanthanide rare: 0.53-0.75%, 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: 11-23%, terbium: 4-9%, gadolinium: 13-17%, praseodymium: 17-21%, and surplus is lanthanum, and above each component sum is 100%.
Further restriction technical scheme of the present invention, the aforesaid oxidation resistant iron alloy coating for thermospray, the coating end that this coating is made up of metallic substance, the chemical composition of its metallic substance is by weight percentage: Cr:4.6%, C:0.36%, Si:0.8%, Mn:1.5%, Cu:0.26%, Sn:0.49%, Al:0.62%, Ni:0.5%, Mo, W are at least containing a kind of, and its total content is 3.2%, lanthanide rare: 0.53%, 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: 11%, terbium: 4%, gadolinium: 13%, praseodymium: 17%, and surplus is lanthanum, and above each component sum is 100%.
The aforesaid oxidation resistant iron alloy coating for thermospray, the coating end that this coating is made up of metallic substance, the chemical composition of its metallic substance is by weight percentage: Cr:4.8%, C:0.41%, Si:1.3%, Mn:1.9%, Cu:0.31%, Sn:0.53%, Al:0.73%, Ni:0.9%, Mo, W are at least containing a kind of, its total content is 3.6%, lanthanide rare: 0.65%, 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: 17%, terbium: 6%, gadolinium: 15%, praseodymium: 19%, and surplus is lanthanum, and above each component sum is 100%.
The aforesaid oxidation resistant iron alloy coating for thermospray, the coating end that this coating is made up of metallic substance, the chemical composition of its metallic substance is by weight percentage: Cr:5.3%, C:0.45%, Si:2.0%, Mn:2.4%, Cu:0.37%, Sn:0.61%, Al:0.88%, Ni:1.7%, Mo, W are at least containing a kind of, its total content is 4.8%, lanthanide rare: 0.75%, 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: 23%, terbium: 9%, gadolinium: 17%, praseodymium: 21%, and surplus is lanthanum, and above each component sum is 100%.
The preparation method of the aforesaid oxidation resistant iron alloy coating for thermospray, 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 aforesaid weight percent formulated ferrous alloy, then this alloy of melting, adopt 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.
The preparation method of the aforesaid oxidation resistant iron alloy coating for thermospray, spray parameters is set to: working current≤600A; Arc voltage≤80V; Argon pressure 0.6-0.85MPa; Argon flow amount 25-45L/min; Hydrogen pressure 0.30-0.35MPa; Hydrogen flowing quantity 2.0-3.0L/min; Powder feeding rate 85-130g/min; Spray distance 90-150mm; 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 the oil storage function of cylinder body 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 oxidation resistant iron alloy coating for thermospray, the coating end that this coating is made up of metallic substance, and the chemical composition of its metallic substance is by weight percentage: Cr:4.6%, C:0.36%, Si:0.8%, Mn:1.5%, Cu:0.26%, Sn:0.49%, Al:0.62%, Ni:0.5%, Mo, W are at least containing a kind of, its total content is 3.2%, lanthanide rare: 0.53%, 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: 11%, terbium: 4%, gadolinium: 13%, praseodymium: 17%, and surplus is lanthanum, and above each component sum is 100%.
The preparation method of the oxidation resistant iron alloy coating for 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 aforesaid weight percent formulated ferrous alloy, then this alloy of melting, adopt 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; Spray parameters is set to: working current 600A; Arc voltage 80V; Argon pressure 0.6MPa; Argon flow amount 25L/min; Hydrogen pressure 0.30MPa; Hydrogen flowing quantity 2.0L/min; Powder feeding rate 85g/min; Spray distance 90mm; Spray angle is 45 °.
embodiment 2
The present embodiment provides a kind of oxidation resistant iron alloy coating for thermospray, the coating end that this coating is made up of metallic substance, and the chemical composition of its metallic substance is by weight percentage: Cr:4.8%, C:0.41%, Si:1.3%, Mn:1.9%, Cu:0.31%, Sn:0.53%, Al:0.73%, Ni:0.9%, Mo, W are at least containing a kind of, its total content is 3.6%, lanthanide rare: 0.65%, 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: 17%, terbium: 6%, gadolinium: 15%, praseodymium: 19%, and surplus is lanthanum, and above each component sum is 100%.
The preparation method of the oxidation resistant iron alloy coating for 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 aforesaid weight percent formulated ferrous alloy, then this alloy of melting, adopt 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; Spray parameters is set to: working current 580A; Arc voltage 70V; Argon pressure 0.75MPa; Argon flow amount 35L/min; Hydrogen pressure 0.33MPa; Hydrogen flowing quantity 2.5L/min; Powder feeding rate 100g/min; Spray distance 120mm; Spray angle is 55 °.
embodiment 3
The present embodiment provides a kind of oxidation resistant iron alloy coating for thermospray, the coating end that this coating is made up of metallic substance, and the chemical composition of its metallic substance is by weight percentage: Cr:5.3%, C:0.45%, Si:2.0%, Mn:2.4%, Cu:0.37%, Sn:0.61%, Al:0.88%, Ni:1.7%, Mo, W are at least containing a kind of, its total content is 4.8%, lanthanide rare: 0.75%, 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: 23%, terbium: 9%, gadolinium: 17%, praseodymium: 21%, and surplus is lanthanum, and above each component sum is 100%.
The preparation method of the oxidation resistant iron alloy coating for 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 aforesaid weight percent formulated ferrous alloy, then this alloy of melting, adopt 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; Spray parameters is set to: working current 550A; Arc voltage 60V; Argon pressure 0.85MPa; Argon flow amount 45L/min; Hydrogen pressure 0.35MPa; Hydrogen flowing quantity 3.0L/min; Powder feeding rate 130g/min; Spray distance 150mm; 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. the oxidation resistant iron alloy coating for thermospray, it is characterized in that: the coating end that this coating is made up of metallic substance, the chemical composition of its metallic substance is by weight percentage: Cr:4.6-5.3%, C:0.36-0.45%, Si:0.8-2.0%, Mn:1.5-2.4%, Cu:0.26-0.37%, Sn:0.49-0.61%, Al:0.62-0.88%, Ni:0.5-1.7%, and to meet Mn and Ni sum be 2.2-4.2%, Mo, W is at least containing a kind of, its total content is 3.2-4.8%, lanthanide rare: 0.53-0.75%, 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: 11-23%, terbium: 4-9%, gadolinium: 13-17%, praseodymium: 17-21%, and surplus is lanthanum, and above each component sum is 100%.
2. as claimed in claim 1 for the oxidation resistant iron alloy coating of thermospray, it is characterized in that: the coating end that this coating is made up of metallic substance, the chemical composition of its metallic substance is by weight percentage: Cr:4.6%, C:0.36%, Si:0.8%, Mn:1.5%, Cu:0.26%, Sn:0.49%, Al:0.62%, Ni:0.5%, Mo, W are at least containing a kind of, its total content is 3.2%, lanthanide rare: 0.53%, 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: 11%, terbium: 4%, gadolinium: 13%, praseodymium: 17%, and surplus is lanthanum, and above each component sum is 100%.
3. as claimed in claim 1 for the oxidation resistant iron alloy coating of thermospray, it is characterized in that: the coating end that this coating is made up of metallic substance, the chemical composition of its metallic substance is by weight percentage: Cr:4.8%, C:0.41%, Si:1.3%, Mn:1.9%, Cu:0.31%, Sn:0.53%, Al:0.73%, Ni:0.9%, Mo, W are at least containing a kind of, its total content is 3.6%, lanthanide rare: 0.65%, 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: 17%, terbium: 6%, gadolinium: 15%, praseodymium: 19%, and surplus is lanthanum, and above each component sum is 100%.
4. as claimed in claim 1 for the oxidation resistant iron alloy coating of thermospray, it is characterized in that: the coating end that this coating is made up of metallic substance, the chemical composition of its metallic substance is by weight percentage: Cr:5.3%, C:0.45%, Si:2.0%, Mn:2.4%, Cu:0.37%, Sn:0.61%, Al:0.88%, Ni:1.7%, Mo, W are at least containing a kind of, its total content is 4.8%, lanthanide rare: 0.75%, 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: 23%, terbium: 9%, gadolinium: 17%, praseodymium: 21%, and surplus is lanthanum, and above each component sum is 100%.
5., as claimed in claim 1 for the preparation method of the oxidation resistant iron alloy coating of thermospray, it 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 aforesaid weight percent formulated ferrous alloy, then this alloy of melting, adopt 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., as claimed in claim 5 for the preparation method of the oxidation resistant iron alloy coating of thermospray, it is characterized in that: spray parameters is set to: working current≤600A; Arc voltage≤80V; Argon pressure 0.6-0.85MPa; Argon flow amount 25-45L/min; Hydrogen pressure 0.30-0.35MPa; Hydrogen flowing quantity 2.0-3.0L/min; Powder feeding rate 85-130g/min; Spray distance 90-150mm; Spray angle is 45 °-75 °.
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Cited By (1)
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| CN105734480A (en) * | 2015-12-09 | 2016-07-06 | 北京矿冶研究总院 | Method for improving corrosion resistance of lead-cooled neutron reactor structural component |
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Application publication date: 20150722 |