CN102888538A - Protective coating material for power plant steel and preparation method thereof - Google Patents
Protective coating material for power plant steel and preparation method thereof Download PDFInfo
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- CN102888538A CN102888538A CN2012103875881A CN201210387588A CN102888538A CN 102888538 A CN102888538 A CN 102888538A CN 2012103875881 A CN2012103875881 A CN 2012103875881A CN 201210387588 A CN201210387588 A CN 201210387588A CN 102888538 A CN102888538 A CN 102888538A
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Abstract
The invention belongs to the field of high-temperature coating protection, and particularly relates to a protective coating material for power plant steel and a preparation method thereof. The protective coating material is composed of the following elements in percentage by mass: 17-23% of Co, 19-25% of Cr, 7-11% of Al, 0.5-1.5% of Y and the balance of Ni. Metals Ni, Co, Cr, Al and Y are molten into an alloy bar. When an electron beam physical vapor deposition technology is utilized to prepare the coating, the deposition rate can be controlled properly (at 0.3-1 mu m/min) to reduce the stress in the deposition process, and the temperature of the substrate can be controlled at 800-900 DEG C to obtain the coating with higher bonding strength. The coating material prepared by the method can well protect the substrate from the corrosion of the external environment, the coating has favorable bonding force with the substrate, the coating thickness and uniformity can be controlled accurately, and the coating has favorable surface roughness and favorable aerodynamical properties.
Description
Technical field
The invention belongs to high temperature coating protection field, particularly a kind of barrier material of using steel for power plant and preparation method thereof.
Background technology
Along with the development of science and technology with to the increasing demand of the energy, people have caused great concern to the energy and environmental problem, thereby energy-saving and emission-reduction are had higher requirement, impel the development of the turbine power plant of high-efficiency and low-pollution, this also proposes higher requirement to working temperature and the pressure in power station, Production of Heat-resistant Materials for Power Generation is also had higher requirement, but present material is difficult to satisfy the requirement under all working conditions, compare with the superalloy that exploitation is new, the research cost of coating technology is much lower, and technique is also real feasible.Adopt coating technology can remedy the shortcoming of single-material, for material provides new solution route at the load-bearing of high-temperature field, the electro beam physics vapour deposition technology is as extremely people's favor of one of preparation method of coating, the advantage such as adopt the prepared coating of this method to have that coatingsurface is smooth, thickness is controlled and crystalline structure is reasonable.The T/P92 steel is power station steel present and that extensively adopt in the future, it is difficult to and can meets the demands under certain conditions, adopt the coating protection system to have great importance thereon, therefore the present invention adopts the electro beam physics vapour deposition technology to prepare high-temperature oxidation resistant coating at the T/P92 matrix, thereby has improved use properties.
In order to improve the high temperature oxidation resistance of power plant component, especially at T/P92 steel present and that extensively adopt in the future, the employing coating protection has great importance, adopt NiCoCrAlY as coating, because the elements such as Ni, Co, Cr have preferably high temperature resistance antioxidant property and mechanical behavior under high temperature, but to reduce oxidative phenomena in order making in certain temperature range, in coating, to add Al, because under hot conditions, the Al oxidation has generated Al
2O
3, fine and close Al
2O
3Have good protective effect, so NiCoCrAlY is used to do the high temperature resistance protective material, can be good at protecting matrix to avoid the erosion of external environment.
The preparation method of coating has much at present, as: the technology such as plasma spraying and electro beam physics vapour deposition, yet the electro beam physics vapour deposition technology is with a kind of evaporation coating method of electron beam as thermal source, with respect to other method for manufacturing thin film, its vaporator rate is high, almost can evaporate all materials, and the bonding force of the coating that obtains of deposition and matrix is very good, what obtain is organized as columnar crystal structure.Beam power is easy to regulate, and beam spot size and position are easy to control, be conducive to accurately control thickness and homogeneity, and the coating that obtains has good surfaceness, good aerodynamic performance is arranged and enjoys favor.
Summary of the invention
Not enough for prior art, the invention provides a kind of barrier material of using steel for power plant and preparation method thereof.
A kind of for the barrier material of power plant with steel, elementary composition by Ni, Co, Cr, Al, five kinds of Y, wherein the massfraction of Co is 17% ~ 23%, the massfraction of Cr is 19% ~ 25%, the massfraction of Al is 7% ~ 11%, the massfraction of Y is 0.5% ~ 1.5%, and all the other are Ni.
A kind of for the preparation method of power plant with the barrier material of steel, its concrete steps are as follows:
Ni, Co, Cr, Al, Y Metal Melting are smelt the alloy material rod, and wherein the massfraction of Co is 17% ~ 23%, the massfraction of Cr is 19% ~ 25%, the massfraction of Al is 7% ~ 11%, the massfraction of Y is 0.5% ~ 1.5%, and all the other are Ni; Adopt the electro beam physics vapour deposition technology to prepare coating, in the process of deposition, in order to reduce stress, suitably control sedimentation rate, make it between 0.3 μ m/min ~ 1 μ m/min, in order to obtain the higher coating of bonding strength, substrate temperature is controlled between 800 ℃ ~ 900 ℃.
Beneficial effect of the present invention is:
Adopt NiCoCrAlY also to can be used as the tack coat of thermal barrier coating as protective coating, because the elements such as Ni, Co, Cr have preferably high temperature resistance antioxidant property and mechanical behavior under high temperature, but reduce oxidative phenomena in order to make in certain temperature range, in coating, add Al, because under hot conditions, the Al oxidation has generated Al
2O
3, fine and close Al
2O
3Have good protective effect, so NiCoCrAlY is used to do the high temperature resistance protective material, can be good at protecting matrix to avoid the erosion of external environment.The coating of employing electro beam physics vapour deposition technology preparation and the bonding force of matrix are very good, what obtain is organized as columnar crystal structure, can accurately control thickness and homogeneity, and the coating that obtains has good surfaceness, good aerodynamic performance is arranged and enjoy favor, the present invention can be applicable to the protection that the metallic substance of steel and automobile and other industries is used in the power station.
Embodiment
The invention provides a kind of barrier material of using steel for power plant and preparation method thereof, the present invention will be further described below in conjunction with embodiment.
Embodiment 1
Ni, Co, Cr, Al, Y Metal Melting are smelt Ф 68 mm, and length is the alloy charge bar of 200 mm, and wherein the massfraction of Co is 20%, the massfraction of Cr is 22%, the massfraction of Al is 8%, the massfraction of Y is 1%, and all the other are Ni; Put into the electro beam physics vapour deposition vacuum chamber, with the vacuum degree control of vacuum chamber 3 * 10
-2Pa, speed with 0.5 μ m/min deposits, body material is T/P92 steel or other metallic substance, in order to obtain better bonding strength and coating structure pattern, the deposition time substrate temperature is controlled at 850 ℃, and coat-thickness is controlled at 60 μ m, after the made sample of getting ready cooled down, put into vacuum heat treatment furnace and heat-treat, its treatment process is: temperature rise rate is 3 ℃/min, 3 * 10
-2Under the Pa condition, 1050 ℃ are incubated 4 hours down, after the furnace cooling, namely can be made into the coating of the anti-oxidant erosion of needed new type high temperature.
Embodiment 2
Ni, Co, Cr, Al, Y Metal Melting are smelt Ф 68 mm, and length is the alloy charge bar of 200 mm, and wherein the massfraction of Co is 21%, the massfraction of Cr is 23%, the massfraction of Al is 9%, the massfraction of Y is 0.8%, and all the other are Ni; Put into the electro beam physics vapour deposition vacuum chamber, with the vacuum degree control of vacuum chamber 3 * 10
-2Pa, speed with 0.5 μ m/min deposits, body material is T/P92 steel or other metallic substance, in order to obtain better bonding strength and coating structure pattern, the deposition time substrate temperature is controlled at 900 ℃, and coat-thickness is controlled at 60 μ m, after the made sample of getting ready cooled down, put into vacuum heat treatment furnace and heat-treat, its treatment process is: temperature rise rate is 3 ℃/min, 3 * 10
-2Under the Pa condition, 1050 ℃ are incubated 4 hours down, after the furnace cooling, namely can be made into the coating of the anti-oxidant erosion of needed new type high temperature.
Embodiment 3
Ni, Co, Cr, Al, Y Metal Melting are smelt Ф 68 mm, and length is the alloy charge bar of 200 mm, and wherein the massfraction of Co is 19%, the massfraction of Cr is 21%, the massfraction of Al is 8%, the massfraction of Y is 1%, and all the other are Ni; Put into the electro beam physics vapour deposition vacuum chamber, with the vacuum degree control of vacuum chamber 3 * 10
-2Pa, speed with 0.5 μ m/min deposits, body material is T/P92 steel or other metallic substance, in order to obtain better bonding strength and coating structure pattern, the deposition time substrate temperature is controlled at 850 ℃, and coat-thickness is controlled at 60 μ m, after the made sample of getting ready cooled down, put into vacuum heat treatment furnace and heat-treat, its treatment process is: temperature rise rate is 3 ℃/min, 3 * 10
-2Under the Pa condition, 1050 ℃ are incubated 4 hours down, after the furnace cooling, namely can be made into the coating of the anti-oxidant erosion of needed new type high temperature.
Claims (2)
1. one kind is used for the barrier material that power plant uses steel, it is characterized in that: this material is elementary composition by Ni, Co, Cr, Al, five kinds of Y, wherein the massfraction of Co is 17% ~ 23%, the massfraction of Cr is 19% ~ 25%, the massfraction of Al is 7% ~ 11%, the massfraction of Y is 0.5% ~ 1.5%, and all the other are Ni.
One kind as claimed in claim 1 for the preparation method of power plant with the barrier material of steel, it is characterized in that concrete steps are as follows:
Ni, Co, Cr, Al, Y Metal Melting are smelt the alloy material rod, and wherein the massfraction of Co is 17% ~ 23%, the massfraction of Cr is 19% ~ 25%, the massfraction of Al is 7% ~ 11%, the massfraction of Y is 0.5% ~ 1.5%, and all the other are Ni; Adopt the electro beam physics vapour deposition technology to prepare coating, in the process of deposition, in order to reduce stress, suitably control sedimentation rate, make it between 0.3 μ m/min ~ 1 μ m/min, in order to obtain the higher coating of bonding strength, substrate temperature is controlled between 800 ℃ ~ 900 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012103875881A CN102888538A (en) | 2012-10-12 | 2012-10-12 | Protective coating material for power plant steel and preparation method thereof |
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|---|---|---|---|
| CN2012103875881A CN102888538A (en) | 2012-10-12 | 2012-10-12 | Protective coating material for power plant steel and preparation method thereof |
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| CN102888538A true CN102888538A (en) | 2013-01-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111349378A (en) * | 2020-05-06 | 2020-06-30 | 北京矿冶科技集团有限公司 | Long-life high-temperature sealing coating material and preparation method thereof |
| CN115874073A (en) * | 2022-11-28 | 2023-03-31 | 先导薄膜材料（广东）有限公司 | Smelting method of high-entropy alloy |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101037551A (en) * | 2006-03-17 | 2007-09-19 | 郑效慈 | High-temperature alloy coating for gas turbine hot parts |
| CN102212786A (en) * | 2011-05-27 | 2011-10-12 | 中国航空工业集团公司北京航空制造工程研究所 | Method for preparing thermal barrier coating |
| CN102517549A (en) * | 2011-12-31 | 2012-06-27 | 北京航空航天大学 | EB-PVD (electron beam physical vapor deposition) and ironing combined method for improving surface integrity of Ni-base superalloy coating |
-
2012
- 2012-10-12 CN CN2012103875881A patent/CN102888538A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101037551A (en) * | 2006-03-17 | 2007-09-19 | 郑效慈 | High-temperature alloy coating for gas turbine hot parts |
| CN102212786A (en) * | 2011-05-27 | 2011-10-12 | 中国航空工业集团公司北京航空制造工程研究所 | Method for preparing thermal barrier coating |
| CN102517549A (en) * | 2011-12-31 | 2012-06-27 | 北京航空航天大学 | EB-PVD (electron beam physical vapor deposition) and ironing combined method for improving surface integrity of Ni-base superalloy coating |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111349378A (en) * | 2020-05-06 | 2020-06-30 | 北京矿冶科技集团有限公司 | Long-life high-temperature sealing coating material and preparation method thereof |
| CN115874073A (en) * | 2022-11-28 | 2023-03-31 | 先导薄膜材料（广东）有限公司 | Smelting method of high-entropy alloy |
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Application publication date: 20130123 |