CN102115864A - High-temperature-resistant protective coating - Google Patents
High-temperature-resistant protective coating Download PDFInfo
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- CN102115864A CN102115864A CN2010105977359A CN201010597735A CN102115864A CN 102115864 A CN102115864 A CN 102115864A CN 2010105977359 A CN2010105977359 A CN 2010105977359A CN 201010597735 A CN201010597735 A CN 201010597735A CN 102115864 A CN102115864 A CN 102115864A
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Abstract
The invention relates to a high-temperature-resistant protective coating, which comprises a substrate. The surface of the substrate is coated with a protective coating; the protective coating is a Ni-Al alloy; and a rare earth element Pr or Gd is added into the protective coating. The rare earth element Pr or Gd is added into a coating system to improve the toughness of the coating and reduce the brittleness of the coating, so that the high-temperature resistance and toughness of the coating can be effectively improved.
Description
Technical field
The present invention relates to high temperature resistant protection field, especially relate to a kind of resistant to elevated temperatures protective coating.
Background technology
Along with the energy-saving and emission-reduction and the needs of raising the efficiency, more and more higher to the resistant to elevated temperatures requirement of hot-end component, developing new high temperature material is the focus that people pay close attention to, and in order to deal with the resistant to elevated temperatures use of material, develops Fe base, Ni base and Co based high-temp-resistant and high-abrasive material in succession, but the Ni based high-temperature alloy is owing to have light specific gravity, the intensity height, plasticity is good, and high temperature endurance performance is superior, processing performance is good, and cost hangs down the advantage with good combination property.Advantages such as become the selection in the industrial production gradually, to have a cost low because of high-temperaure coating, and preparation and performance be good easily, coating is again optimal selection wherein, so develops Ni based high-temp-resistant coating and have important economic and social benefit.For many years, to be alloy be subjected to investigation of materials personnel's extensive concern as the potential high-temperature structural material to intermetallic compound Ni-Al always, but its serious fragility has limited its application and development.
Summary of the invention
It is the resistant to elevated temperatures protective coating that alloy has serious fragility problem that technical problem to be solved by this invention provides a kind of Ni-Al that can solve.
The present invention solves the technical scheme that its technical problem takes: a kind of resistant to elevated temperatures protective coating, comprise matrix, the surface of matrix is coated with protective coating, and what described protective coating adopted is that Ni-Al is an alloy, is added with rare earth element Pr or Gd in the protective coating.
The invention has the beneficial effects as follows: in coating system, add rare earth element Pr or Gd to improve the toughness of coating, reduce the fragility of coating, thereby can effectively improve the high temperature resistance and the toughness of coating.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Among the figure: 1, matrix 2, protective coating
Embodiment
A kind of as shown in Figure 1 resistant to elevated temperatures protective coating comprises matrix 1, and the surface of matrix 1 is coated with protective coating 2, and what described protective coating 2 adopted is that Ni-Al is an alloy, is added with rare earth element Pr or Gd in the protective coating 2.
The present invention is a method of utilizing thermosprays such as plasma spraying or hypersonic flame spraying, prepare the Ni-Al-xGd/Ni-Al-yPr coating at metal base surface, because Ni-Al base alloy has excellent high-temperature mechanics and antioxidant property thereof, be tool potentiality superalloy of future generation, therefore adopt Ni-Al base alloy as high-temperaure coating, make it have higher mechanical property at high temperature, but the coating fragility of Ni-Al base alloy is bigger, crackle can appear in the preparation coating procedure, cause coating quality to descend, therefore in order to improve the performance of coating, the present invention adds rare earth Pr or Gd to improve the toughness of coating in coating system, reduce the fragility of coating, thereby can effectively improve the high temperature resistance and the toughness of coating,, can prepare the coating of different thickness according to different requirements for performance that can better utilised body series coating, it also can require to select different x and y, so that can reach industrial result of use according to concrete use temperature.
The present invention is further described below in conjunction with embodiment.
1. sample substrates 304 stainless steels/other metallic substance.Adopt plasma spray coating process to prepare the Ni-Al-1%Pr/Ni-Al-1%Gd coating of 100 μ m thickness at stainless steel surface, selecting the powder feeding granularity during spraying is 60-120 μ m, and spraying coating process is as shown in table 1, after the spraying by suitable processing.Compare with undressed base material, have tangible resistance to elevated temperatures, can significantly improve the use temperature of body material, have bigger economy and social benefit.
2. sample substrates 304 stainless steels/other metallic substance.Adopt the hypersonic flame spraying technology to prepare the Ni-Al-1%Pr/Ni-Al-1%Gd coating of 100 μ m thickness at stainless steel surface, its technology is similar to shown in the table 1, after the spraying by suitable processing.Compare with undressed base material, have significantly high temperature resistant and abrasion resistance properties, can significantly improve the use temperature of body material, have bigger economy and social benefit.
Table 1 low-voltage plasma spraying prepares the processing parameter of Ni-Al-xPr/yGd coating
| Voltage (v) | Electric current (A) | Argon flow amount (L/min) | Hydrogen flowing quantity (L/min) |
| 50～60 | 500～600 | 50-60 | 15-25 |
| The turntable rotating speed (change/min) | The spray gun rotating speed (change/min) | Cavity pressure (torr) | Powder feed rate (g/min) |
| 5-15 | 35-45 | 70 | 20-40 |
Claims (1)
1. a resistant to elevated temperatures protective coating comprises matrix, and the surface of matrix is coated with protective coating, it is characterized in that: what described protective coating adopted is that Ni-Al is an alloy, is added with rare earth element Pr or Gd in the protective coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105977359A CN102115864A (en) | 2010-12-21 | 2010-12-21 | High-temperature-resistant protective coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105977359A CN102115864A (en) | 2010-12-21 | 2010-12-21 | High-temperature-resistant protective coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102115864A true CN102115864A (en) | 2011-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105977359A Pending CN102115864A (en) | 2010-12-21 | 2010-12-21 | High-temperature-resistant protective coating |
Country Status (1)
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| CN (1) | CN102115864A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107227048A (en) * | 2017-05-25 | 2017-10-03 | 合肥皖化电泵有限公司 | BCP pump thermal dispersant coatings |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1066690A (en) * | 1991-05-13 | 1992-12-02 | 中国科学院金属腐蚀与防护研究所 | A kind of resistance to high temperature corrosion coating and preparation technology thereof |
| CN1521221A (en) * | 2003-01-10 | 2004-08-18 | Protective coating | |
| CN101092695A (en) * | 2006-06-23 | 2007-12-26 | 中国科学院金属研究所 | A coat layer of gamma'Ni3Al /gamma-Ni, preparation and application |
| CN101191225A (en) * | 2006-11-22 | 2008-06-04 | 宝山钢铁股份有限公司 | Antiseptic wearable coat and coating method thereof |
-
2010
- 2010-12-21 CN CN2010105977359A patent/CN102115864A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1066690A (en) * | 1991-05-13 | 1992-12-02 | 中国科学院金属腐蚀与防护研究所 | A kind of resistance to high temperature corrosion coating and preparation technology thereof |
| CN1521221A (en) * | 2003-01-10 | 2004-08-18 | Protective coating | |
| CN101092695A (en) * | 2006-06-23 | 2007-12-26 | 中国科学院金属研究所 | A coat layer of gamma'Ni3Al /gamma-Ni, preparation and application |
| CN101191225A (en) * | 2006-11-22 | 2008-06-04 | 宝山钢铁股份有限公司 | Antiseptic wearable coat and coating method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107227048A (en) * | 2017-05-25 | 2017-10-03 | 合肥皖化电泵有限公司 | BCP pump thermal dispersant coatings |
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Application publication date: 20110706 |