CN103659615A - Sand blasting and spray coating method for reducing surface roughness of inorganic coating - Google Patents
Sand blasting and spray coating method for reducing surface roughness of inorganic coating Download PDFInfo
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- CN103659615A CN103659615A CN201310680280.0A CN201310680280A CN103659615A CN 103659615 A CN103659615 A CN 103659615A CN 201310680280 A CN201310680280 A CN 201310680280A CN 103659615 A CN103659615 A CN 103659615A
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Abstract
The invention provides a sand blasting and spray coating method for reducing surface roughness of an inorganic coating; by the method, the surface roughness of the coating can be effectively reduced so as to effectively improve the corrosion resistance of a blade. The method is characterized in that the sand blasting pressure is 0.10-0.15 MPa, the distance from a spray gun to the blade during sand blasting is 80-120 mm, the mesh number of sand blasting pills is 80-100, and the surface roughness Rz after sand blasting is controlled to be smaller than or equal to 10 microns.
Description
Technical field
The present invention relates to blade anti corrosion processing technique field, especially relate to the technical field that adopts phosphorus chromate erosion shield to carry out blade anti corrosion processing, be specially a kind of sandblast and spraying method that reduces inorganic coating surface roughness.
Background technology
In gas turbine blower blade production process, conventionally can be at blade surface spraying phosphorus chromate erosion shield to improve the antiseptic power of blade.Phosphorus chromate coating is divided into bottom and surface layer, and bottom is phosphate and chromate system containing aluminium powder, and surface layer is phosphate and the chromate system that contains inertia filler.Bottom is sacrificing positive pole coating, has good electrochemical protection ability, and surface layer is barrier type coating, can further improve scour resistance and the anticorrosive property of coating.This coating is applicable to the protection of the spare parts such as stainless steel, low-alloy steel, high strength steel, can improve long-term effectively anti-corrosion capability, thermal shock resistance and the scour resistance of these materials in atmosphere below 600 ℃.Meanwhile, this coating has good heat endurance and higher adhesive force.When environment temperature surpasses 600 ℃, the losing efficacy from sacrificing protection function of this coating, but in 870 ℃, this coating still has good antioxygenic property.
The surface roughness of coating is the key parameter of coating feature, and coating surface roughness is lower, and air-flow and corrosive medium are less to the souring of coating, and the roughness that therefore reduces coating surface contributes to improve the decay resistance of coating.
Summary of the invention
The invention provides a kind of sandblast and spraying method that reduces inorganic coating surface roughness, it is coarse that it can effectively reduce coating surface, thereby effectively improve the anti-corrosion capability of blade.
Its technical scheme is such, and it comprises following technological process: (1) cleaning blade surface, remove blade surface greasy dirt; (2) adopt fixture fixed blade blade root, then blade integral is put into heat-treatment furnace or baking oven, remove blade surface impurity; (3) with adhesive tape, protect blade root; (4) blade is put into sand-blasting machine the blade profile of blade is carried out to sandblast; (5) cleaning blade surface, guarantees that blade surface is residual without sand grains dust; (6) after subbing stirring, packing, filtration, pour spray gun reservoir tank into; (7) in spray painting room, blade surface is carried out to bottom spraying; (8) at room temperature carry out the air-dry of described primer coating; (9) blade is put into heat-treatment furnace and carried out solidifying of subbing; (10) blade is put into sand-blasting machine and carried out conducting sandblast, then the resistivity after the sandblast of pilot blade coating bottom; (11) again clear up blade surface, guarantee that blade surface is residual without sand grains dust; (12) after investment precoat stirring, packing, filtration, pour spray gun reservoir tank into; (13) in spray painting room, blade surface is carried out to surface layer spraying; (14) at room temperature described surface layer coating is carried out to air-dry processing; (15) blade being put into heat-treatment furnace carries out surface layer and solidifies; (16) after detection coating layer thickness, roughness, put in storage; It is characterized in that: in described step (4), the pressure of described sandblast is 0.10 MPa～0.15MPa, during described sandblast, the distance of spray gun and blade is 80mm～120mm, and the ball material order number of described sandblast is 80 order～100 orders, and the Roughness Surface on Control after described sandblast is at Rz≤10 μ m.
It is further characterized in that:
In described step (6), step (12), coating stirs and comprises the following steps: first adopt bobbing machine, in the mode of dither, the aluminium block in coating is carried out to refinement; Then adopt rotary vane type mixer that coating is stirred, mixing time is 12h; Again the coating stirring is divided into bottle packing; Finally the coating being sub-packed in bottle is added to spray gun reservoir tank;
In dividing by the coating stirring the process installing in bottle and the coating in bottle is added in the process of described spray gun reservoir tank, all use 200 order gauzes to carry out coating to filter, to remove the coarse granule in coating;
In described step (10), the pressure of described conducting sandblast is 0.1MPa～0.2MPa, and during described sandblast, the distance of spray gun and blade is 80mm～120mm, and the ball material order number of described sandblast is 80 order～100 orders;
In described step (10), after described conducting sandblast, conductivity is answered≤15 Ω;
Before and after described bottom spraying, before and after surface layer spraying, the thickness difference of coating all should be controlled in 10 μ m;
In air-dry processing in described step (8), step (13), environment temperature should be controlled at 20～26 ℃, and ambient humidity should remain on 40%～60%, guarantees time >=2 hour of air-dry processing;
Curing processing in described step (9), step (14), is first heated to 80 ℃ of insulation 1h, so that the moisture in coating evaporates better, then heats up most 310～320 ℃, insulation 1～1.5h;
After spraying surface, the roughness Rz≤4 μ m of coating surface;
Described investment precoat must be at 8 hours from preparation starts interiorly completing spraying, weathering is processed and enter heat-treatment furnace to carry out surface layer curing.
The beneficial effect of technique of the present invention is: first it by controlling the distance of pressure, spray gun and blade and the order number of sandblast ball material of sandblast, reduce the roughness on coated substrate surface, thereby lays good basis for reducing coating surface roughness; Control respectively again the stirring technique of subbing, investment precoat, make coating more even, and coating carries out twice packing, twice gauze filters the big particle in coating is removed, thereby can further reduce the surface roughness after coating spraying; In addition, after bottom spraying and surface layer spray, all need coating to carry out air-dry processing, strictly controlled environment temperature and temperature when air-dry processing, and control time of air-dry processing, with avoid the air-dry processing time long and cause coating get damp again and cause follow-up when curing coating there is trickling phenomenon and produce defect.
The specific embodiment
Embodiment mono-:
The sandblast and the spraying method that reduce inorganic coating surface roughness, it comprises following technological process:
(1) cleaning blade surface, removes blade surface greasy dirt;
(2) adopt fixture fixed blade blade root, then blade integral is put into heat-treatment furnace or baking oven, remove blade surface impurity;
(3) with adhesive tape, protect blade root;
(4) blade is put into sand-blasting machine the blade profile of blade is carried out to sandblast, the pressure of sandblast is 0.10 MPa, during described sandblast, the distance of spray gun and blade is 100mm, and the ball material order number of described sandblast is 90 orders, and the Roughness Surface on Control after described sandblast is at Rz≤10 μ m;
(5) cleaning blade surface, guarantees that blade surface is residual without sand grains dust;
(6) after subbing stirring, packing, filtration, pour spray gun reservoir tank into, first adopt bobbing machine, in the mode of dither, the aluminium block in coating is carried out to refinement; Then adopt rotary vane type mixer that coating is stirred, mixing time is 12h; Again the coating stirring is divided into bottle packing; Finally the coating being sub-packed in bottle is added to spray gun reservoir tank; In dividing by the coating stirring the process installing in bottle and the coating in bottle is added in the process of described spray gun reservoir tank, all use 200 order gauzes to carry out coating to filter, to remove the coarse granule in coating;
(7) in spray painting room, blade surface is carried out to bottom spraying, during spraying, spray gun should be as far as possible with vertical by spray plane, if the angle spraying of spray gun to tilt, coating is difficult for being attached on blade surface, can cause coating layer thickness less than normal, during follow-up conducting sandblast, the impact that the coating of this part is subject to sand grains is easily peeled off;
(8) at room temperature carry out the air-dry of described primer coating, the air-dry Temperature Setting of bottom is 20 ℃, opens air-conditioning to keep the humidity of air to maintain 60%, and air-dry time is 2 hours;
(9) blade is put into heat-treatment furnace and carried out solidifying of subbing, the curing process of bottom is incubated 1 hour for being heated to 80 ℃, and then is warming up to 320 ℃ of insulation 1.25h, and the air cooling of coming out of the stove, especially notices that in solidification process the phenomenon of colliding with can not appear in blade;
(10) blade is put into sand-blasting machine and carried out conducting sandblast, the pressure of conducting sandblast is 0.15MPa, during described sandblast, the distance of spray gun and blade is 100mm, the ball material order number of described sandblast is 100 orders, and then the resistivity after the sandblast of pilot blade coating bottom, control conductivity≤15 Ω;
(11) again clear up blade surface, guarantee that blade surface is residual without sand grains dust;
(12) after investment precoat stirring, packing, filtration, pour spray gun reservoir tank into, its embodiment is identical with step (6);
(13) in spray painting room, blade surface is carried out to surface layer spraying, the roughness Rz≤4 μ m of coating surface after surface layer spraying;
(14) at room temperature described surface layer coating is carried out to air-dry processing, during air-dry processing, environment temperature should be controlled at 20 ℃, and ambient humidity should remain on 50%, and the time that guarantees air-dry processing is 2.5 hours;
(15) blade is put into heat-treatment furnace and carried out surface layer and solidify, solidification temperature is 310 ℃, insulation 1h;
(16) after detection coating layer thickness, roughness, put in storage.
In above-mentioned technique, before and after bottom spraying, before and after surface layer spraying, the thickness difference of coating all should be controlled in 10 μ m; Investment precoat must be at 8 hours from preparation starts interiorly completing spraying, weathering is processed and enter heat-treatment furnace to carry out surface layer curing.
Embodiment bis-:
The sandblast and the spraying method that reduce inorganic coating surface roughness, it comprises following technological process:
(1) cleaning blade surface, removes blade surface greasy dirt;
(2) adopt fixture fixed blade blade root, then blade integral is put into heat-treatment furnace or baking oven, remove blade surface impurity;
(3) with adhesive tape, protect blade root;
(4) blade is put into sand-blasting machine the blade profile of blade is carried out to sandblast, the pressure of sandblast is 0.15MPa, during described sandblast, the distance of spray gun and blade is 80mm, and the ball material order number of described sandblast is 100 orders, and the Roughness Surface on Control after described sandblast is at Rz≤10 μ m;
(5) cleaning blade surface, guarantees that blade surface is residual without sand grains dust;
(6) after subbing stirring, packing, filtration, pour spray gun reservoir tank into, first adopt bobbing machine, in the mode of dither, the aluminium block in coating is carried out to refinement; Then adopt rotary vane type mixer that coating is stirred, mixing time is 12h; Again the coating stirring is divided into bottle packing; Finally the coating being sub-packed in bottle is added to spray gun reservoir tank; In dividing by the coating stirring the process installing in bottle and the coating in bottle is added in the process of described spray gun reservoir tank, all use 200 order gauzes to carry out coating to filter, to remove the coarse granule in coating;
(7) in spray painting room, blade surface is carried out to bottom spraying, during spraying, spray gun should be as far as possible with vertical by spray plane, if the angle spraying of spray gun to tilt, coating is difficult for being attached on blade surface, can cause coating layer thickness less than normal, during follow-up conducting sandblast, the impact that the coating of this part is subject to sand grains is easily peeled off;
(8) at room temperature carry out the air-dry of described primer coating, the air-dry Temperature Setting of bottom is 23 ℃, opens air-conditioning to keep the humidity of air to maintain 50%, air-dry time >=3 hour;
(9) blade is put into heat-treatment furnace and carried out solidifying of subbing, the curing process of bottom is incubated 1 hour for being first heated to 80 ℃, and then is warming up to 315 ℃ of insulation 1h, and the air cooling of coming out of the stove, especially notices that in solidification process the phenomenon of colliding with can not appear in blade;
(10) blade is put into sand-blasting machine and carried out conducting sandblast, the pressure of conducting sandblast is 0.2MPa, and during described sandblast, the distance of spray gun and blade is 80mm, and the ball material order number of described sandblast is 90 orders, and then the resistivity after the sandblast of pilot blade coating bottom, control conductivity≤15 Ω;
(11) again clear up blade surface, guarantee that blade surface is residual without sand grains dust;
(12) after investment precoat stirring, packing, filtration, pour spray gun reservoir tank into, its embodiment is identical with step (6);
(13) in spray painting room, blade surface is carried out to surface layer spraying, the roughness Rz≤4 μ m of coating surface after surface layer spraying;
(14) at room temperature described surface layer coating is carried out to air-dry processing, during air-dry processing, environment temperature should be controlled at 26 ℃, and ambient humidity should remain on 40%, guarantees the time 2 h of air-dry processing;
(15) blade is put into heat-treatment furnace and carried out surface layer and solidify, solidification temperature is 320 ℃, insulation 1.5h;
(16) after detection coating layer thickness, roughness, put in storage.
In above-mentioned technique, before and after bottom spraying, before and after surface layer spraying, the thickness difference of coating all should be controlled in 10 μ m; Investment precoat must be at 8 hours from preparation starts interiorly completing spraying, weathering is processed and enter heat-treatment furnace to carry out surface layer curing.
Embodiment tri-:
The sandblast and the spraying method that reduce inorganic coating surface roughness, it comprises following technological process:
(1) cleaning blade surface, removes blade surface greasy dirt;
(2) adopt fixture fixed blade blade root, then blade integral is put into heat-treatment furnace or baking oven, remove blade surface impurity;
(3) with adhesive tape, protect blade root;
(4) blade is put into sand-blasting machine the blade profile of blade is carried out to sandblast, the pressure of sandblast is 0.125MPa, during described sandblast, the distance of spray gun and blade is 120mm, and the ball material order number of described sandblast is 80 orders, and the Roughness Surface on Control after described sandblast is at Rz≤10 μ m;
(5) cleaning blade surface, guarantees that blade surface is residual without sand grains dust;
(6) after coating stirring, packing, filtration, pour spray gun reservoir tank into, first adopt bobbing machine, in the mode of dither, the aluminium block in coating is carried out to refinement; Then adopt rotary vane type mixer that coating is stirred, mixing time is 12h; Again the coating stirring is divided into bottle packing; Finally the coating being sub-packed in bottle is added to spray gun reservoir tank; In dividing by the coating stirring the process installing in bottle and the coating in bottle is added in the process of described spray gun reservoir tank, all use 200 order gauzes to carry out coating to filter, to remove the coarse granule in coating;
(7) in spray painting room, blade surface is carried out to bottom spraying, during spraying, spray gun should be as far as possible with vertical by spray plane, if the angle spraying of spray gun to tilt, coating is difficult for being attached on blade surface, can cause coating layer thickness less than normal, during follow-up conducting sandblast, the impact that the coating of this part is subject to sand grains is easily peeled off;
(8) at room temperature carry out the air-dry of described primer coating, the air-dry Temperature Setting of bottom is 26 ℃, opens air-conditioning to keep the humidity of air to maintain 40%, and air-dry time is 2.3 hours;
(9) blade is put into heat-treatment furnace and carried out solidifying of subbing, the curing process of bottom is incubated 1 hour for being heated to 80 ℃, and then is warming up to 310 ℃ of insulation 1.5h, and the air cooling of coming out of the stove, especially notices that in solidification process the phenomenon of colliding with can not appear in blade;
(10) blade is put into sand-blasting machine and carried out conducting sandblast, the pressure of conducting sandblast is 0.1MPa, and during described sandblast, the distance of spray gun and blade is 120mm, and the ball material order number of described sandblast is 80 orders, and then the resistivity after the sandblast of pilot blade coating bottom, control conductivity≤15 Ω;
(11) again clear up blade surface, guarantee that blade surface is residual without sand grains dust;
(12) after investment precoat stirring, packing, filtration, pour spray gun reservoir tank into, its embodiment is identical with step (6);
(13) in spray painting room, blade surface is carried out to surface layer spraying, the roughness Rz≤4 μ m of coating surface after surface layer spraying;
(14) at room temperature described surface layer coating is carried out to air-dry processing, during air-dry processing, environment temperature should be controlled at 23 ℃, and ambient humidity should remain on 60%, and the time that guarantees air-dry processing is 2.8 hours;
(15) blade is put into heat-treatment furnace and carried out surface layer and solidify, solidification temperature is 315 ℃, insulation 1.25h;
(16) after detection coating layer thickness, roughness, put in storage.
In above-mentioned technique, before and after bottom spraying, before and after surface layer spraying, the thickness difference of coating all should be controlled in 10 μ m; Investment precoat must be at 8 hours from preparation starts interiorly completing spraying, weathering is processed and enter heat-treatment furnace to carry out surface layer curing.
Claims (9)
1. the sandblast and the spraying method that reduce inorganic coating surface roughness, it comprises following technological process: (1) cleaning blade surface, remove blade surface greasy dirt; (2) adopt fixture fixed blade blade root, then blade integral is put into heat-treatment furnace or baking oven, remove blade surface impurity; (3) with adhesive tape, protect blade root; (4) blade is put into sand-blasting machine the blade profile of blade is carried out to sandblast; (5) cleaning blade surface, guarantees that blade surface is residual without sand grains dust; (6) after subbing stirring, packing, filtration, pour spray gun reservoir tank into; (7) in spray painting room, blade surface is carried out to bottom spraying; (8) at room temperature carry out the air-dry of described primer coating; (9) blade is put into heat-treatment furnace and carried out solidifying of subbing; (10) blade is put into sand-blasting machine and carried out conducting sandblast, then the resistivity after the sandblast of pilot blade coating bottom; (11) again clear up blade surface, guarantee that blade surface is residual without sand grains dust; (12) after investment precoat stirring, packing, filtration, pour spray gun reservoir tank into; (13) in spray painting room, blade surface is carried out to surface layer spraying; (14) at room temperature described surface layer coating is carried out to air-dry processing; (15) blade being put into heat-treatment furnace carries out surface layer and solidifies; (16) after detection coating layer thickness, roughness, put in storage; It is characterized in that: in described step (4), the pressure of described sandblast is 0.10 MPa～0.15MPa, during described sandblast, the distance of spray gun and blade is 80mm～120mm, and the ball material order number of described sandblast is 80 order～100 orders, and the Roughness Surface on Control after described sandblast is at Rz≤10 μ m.
2. a kind of sandblast and spraying method that reduces inorganic coating surface roughness according to claim 1, is characterized in that: in described step (6), step (12), coating stirs and comprises the following steps: first adopt bobbing machine, in the mode of dither, the aluminium block in coating is carried out to refinement; Then adopt rotary vane type mixer that coating is stirred, mixing time is 12h; Again the coating stirring is divided into bottle packing; Finally the coating being sub-packed in bottle is added to spray gun reservoir tank.
3. a kind of sandblast and spraying method that reduces inorganic coating surface roughness according to claim 2, it is characterized in that: in dividing by the coating stirring the process installing in bottle and the coating in bottle is added in the process of described spray gun reservoir tank, all use 200 order gauzes to carry out coating to filter, to remove the coarse granule in coating.
4. a kind of sandblast and spraying method that reduces inorganic coating surface roughness according to claim 1, it is characterized in that: in described step (10), the pressure of described conducting sandblast is 0.1MPa～0.2MPa, during described sandblast, the distance of spray gun and blade is 80mm～120mm, and the ball material order number of described sandblast is 80 order～100 orders.
5. a kind of sandblast and spraying method that reduces inorganic coating surface roughness according to claim 4, is characterized in that: in described step (10), after described conducting sandblast, conductivity should≤15 Ω.
6. a kind of sandblast and spraying method that reduces inorganic coating surface roughness according to claim 1, it is characterized in that: in the air-dry processing in described step (8), step (13), environment temperature should be controlled at 20～26 ℃, and ambient humidity should remain on 40%～60%, guarantee time >=2 hour of air-dry processing.
7. a kind of sandblast and spraying method that reduces inorganic coating surface roughness according to claim 1, it is characterized in that: the curing processing in described step (9), step (14), first be heated to 80 ℃ of insulation 1h, so that the moisture in coating evaporates better, heat up again most 310～320 ℃, insulation 1～1.5h.
8. a kind of sandblast and spraying method that reduces inorganic coating surface roughness according to claim 1, is characterized in that: after spraying surface, and the roughness Rz≤4 μ m of coating surface.
9. a kind of sandblast and spraying method that reduces inorganic coating surface roughness according to claim 1, is characterized in that: described investment precoat must be at 8 hours from preparation starts interiorly completing spraying, weathering is processed and enter heat-treatment furnace to carry out surface layer curing.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103949389A (en) * | 2014-04-21 | 2014-07-30 | 哈尔滨汽轮机厂有限责任公司 | Application of domestic paint in protective process of medium-temperature parts of gas turbine |
| CN104972402A (en) * | 2014-04-04 | 2015-10-14 | 上海亚尔光源有限公司 | Tungsten rod surface treatment technology |
| CN108746855A (en) * | 2018-06-11 | 2018-11-06 | 杭州和源精密工具有限公司 | A kind of coating saw blade process of surface treatment |
| CN109848860A (en) * | 2019-02-21 | 2019-06-07 | 青岛环普节能科技有限公司 | A kind of water pump Desalination cleansing method |
| CN113770003A (en) * | 2021-09-15 | 2021-12-10 | 无锡透平叶片有限公司 | Spraying method for improving quality of primer of blade profile anti-corrosion coating |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104972402A (en) * | 2014-04-04 | 2015-10-14 | 上海亚尔光源有限公司 | Tungsten rod surface treatment technology |
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| CN109848860B (en) * | 2019-02-21 | 2020-09-04 | 青岛环普节能科技有限公司 | Water pump desalination cleaning method |
| CN113770003A (en) * | 2021-09-15 | 2021-12-10 | 无锡透平叶片有限公司 | Spraying method for improving quality of primer of blade profile anti-corrosion coating |
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| Publication number | Publication date |
|---|---|
| CN103659615B (en) | 2016-03-30 |
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