CN101307420A - Process for reacting spray metal titan and cobalt with mixed thermal spraying powder of boron carbide - Google Patents
Process for reacting spray metal titan and cobalt with mixed thermal spraying powder of boron carbide Download PDFInfo
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- CN101307420A CN101307420A CNA200810040150XA CN200810040150A CN101307420A CN 101307420 A CN101307420 A CN 101307420A CN A200810040150X A CNA200810040150X A CN A200810040150XA CN 200810040150 A CN200810040150 A CN 200810040150A CN 101307420 A CN101307420 A CN 101307420A
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Abstract
The invention discloses a method for reaction spray of thermal spraying powder mixed by metallic titanium, cobalt and boron carbide in the thermal spraying technical field. The method is as follows: a substrate is cut into an abrasion resistant experiment sample; oil and rust are removed before spraying; after the substrate is preheated, a bonding layer is sprayed; vacuum heat treatment is performed on the bonding layer; reaction spray thermal spraying powder is fed into a powder feeder, and then the current of plasma equipment is adjusted to between 500 and 600 amperes, the flow rate of ionized gas H2 between 20 and 40 liters per hour, the powder feeding amount between 15 and 25 rounds per minute, and the spraying distance between 100 and 160 millimeters; reaction spray is performed on the sample after heat treatment; and finally atmospheric heat treatment is performed on a coating. The method solves the problem of poor performance of the coating obtained by the reaction spray after metals and ceramic powder are mixed for spraying granulation, and has simple technological flow; and the abrasion resistance of the coating sprayed by the optimized technique is improved.
Description
Technical field
The present invention relates to a kind of method of technical field of hot, specifically is a kind of reaction spray coating metal titanium, cobalt and boron carbide-mixed thermal spraying powder method.
Background technology
Thermospray is as a kind of process for modifying surface, according to the difference of selected materials and spraying method, that the coating that is obtained has is wear-resistant, anti-oxidant, electricity is led and functions such as resistance, Chinese People's Anti-Japanese Military and Political College's gas and molten metal dip etching, resistance to chemical attack, heat insulation high temperature resistant, resizing, parts clearance control.Be widely used in various fields such as aerospace, metallurgy, electric power, machineries, be rapidly developed in recent years.The hot-spraying techniques parameter of the quality of hot spray coating quality and employing has close contact.The electric current that is adopted in the thermal spray process, hydrogen flowing quantity, powder sending quantity and spray distance all have certain influence to coating performance.
Find through literature search prior art, 2006 Dong Yan spring pointed out in doctorate paper " research of reaction and plasma spraying nano TiN coated material ": in the reactive spray TiN coating procedure, the gas flow of ions amount of plasma apparatus and kind directly influence arc power and flame flow velocity degree, have obtained reactive spray TiN coating optimum N by orthogonal experiment
2Powder feeding gas flow, Ar and N
2The processing parameter of gas flow of ions amount, electric current and rifle distance.Its limitation part is that the reactive spray powder composition of being studied single (having only the metal Ti powder) does not relate to the technical study of multiple different properties hot spray powder.Find also in the retrieval that disclose a kind of preparation method who is used for the mixed thermal spraying powder of reactive spray in Chinese patent CN101176920, the concrete weight ratio of constituents of its mixed thermal spraying powder is: Ti powder 50%～75% and B
4C powder 25%～50%, but the technology of reactive spray is not studied.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, the method for a kind of reaction spray coating metal titanium, cobalt and boron carbide-mixed thermal spraying powder is provided.After the invention solves metal and the granulation of ceramic powder mixed atomizing, be used for the not good difficult problem of reactive spray gained coating performance, by design spraying current, ion gas H
2Flow, powder sending quantity and spray distance can be that measurement index has obtained optimum reactive spray technology with abrasion property, and this technology spraying gained coating abrasion performance is improved.
The present invention is achieved by the following technical solutions:
The present invention specifically may further comprise the steps:
The first step, the spraying sample is prepared: selecting medium carbon steel for use is body material, and line cuts into disk, cleans the rear surface through fine grinding with acetone, dries up at last;
Described fine grinding, its time is 10 minutes-30 minutes, is with silicon-dioxide water sand, grinds off the rust staining and the oxide skin of substrate material surface.
Second step fixed sample with anchor clamps, opened the plasma apparatus power supply earlier, with the pre-hot basal body of plasma flame, and then opened the powder feeder switch, the spraying tack coat, and thickness is the 50-80 micron;
Described preheating, its substrate temperature are 250 ℃-350 ℃.
Described tack coat, its material are MCrAlY.
The 3rd step, the sample that has sprayed tack coat is taken off, put into vacuum carbon tube furnace and carry out vacuum heat treatment, make the diffusion of tack coat alloy material evenly, furnace cooling;
Described vacuum heat treatment, its temperature are 900-1000 ℃, and the time is 10 hours-24 hours, carries out in the protective atmosphere of argon gas.
The 4th step, the reactive spray hot spray powder is packed in the powder feeder, adjusting the plasma apparatus electric current then is 500A-600A, ion gas H
2Flow is 20L/h-40L/h, powder sending quantity is 15r/min-25r/min, spray distance is 100mm-160mm, sample after the thermal treatment is carried out reactive spray, open the plasma apparatus power supply has tack coat with the flame preheating sample earlier, open the powder feeder switch then, carry out reaction spray coating metal titanium, cobalt and boron carbide-mixed thermal spraying powder, thickness is the 250-270 micron;
Described preheating, its substrate temperature are 250 ℃-350 ℃.
The 5th step, the sample behind the reactive spray is carried out atmospheric heat handle in cabinet-type electric furnace, reduce the thermal stresses of coating, furnace cooling;
Described atmospheric heat is handled, and is that sample is heat-treated under atmospheric environment, and its temperature is 900 ℃-1000 ℃, and the time is 5-10 hour.
The present invention is through long-term technology experiment and adjustment, drawing reaction spray coating metal titanium, cobalt and boron carbide-mixed thermal spraying powder optimal processing parameter is: electric current 500-600A, hydrogen flowing quantity 20-40L/h, powder sending quantity 15-25r/min, spray distance 100-160mm, the factor that influences the coating abrasion performance quality is from being followed successively by to weak by force: ion gas H
2Flow＞powder sending quantity＞electric current＞spray distance.Under such parameter condition, solved metal and the granulation of ceramic powder mixed atomizing after, be used for the not good difficult problem of reactive spray gained coating performance, it is simple to have a technical process, the technology spraying gained coating abrasion performance after the optimization is improved.
The present invention is directed to the shortage of existing reactive spray production technique; a kind of metal titanium is provided; the optimised process of cobalt and boron carbide-mixed thermal spraying powder coating preparation; adopt the coating of this optimal processing parameter spraying; wear resistance is good; the coating densification, powdered reaction is abundant, can play the effect of good protection matrix.
Embodiment
Below embodiments of the invention are elaborated: present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1
(1) the spraying sample is prepared: selecting medium carbon steel for use is body material, and line cuts into diameter 40mm, and thickness 3mm disk cleans the rear surface through 800 order silicon-dioxide waterproof abrasive paper wet-millings 10 minutes with acetone, dries up the surface with hair dryer then;
(2) fix sample with anchor clamps, open the plasma apparatus power supply earlier, with the pre-hot basal body of plasma flame, make substrate temperature reach 250 ℃, and then open the powder feeder switch, the spraying tack coat sprays the MCrAlY tack coat then, and thickness is 50 microns;
(3) sample that will spray tack coat takes off, and under the protective atmosphere of argon gas, puts into vacuum carbon tube furnace and carries out vacuum heat treatment 10 hours at 900 ℃, makes the diffusion of tack coat alloy material evenly, takes out behind the furnace cooling;
(4) adjust device parameter: 100g reactive spray mixed thermal spraying powder is packed in the powder feeder into 61.4gTi powder wherein, 15gCo powder and 23.6gB
4The C powder, adjusting the plasma apparatus electric current then is 500A, ion gas H
2Flow is 20L/h, powder sending quantity is 15r/min, spray distance is 100mm, sample after the thermal treatment is carried out reactive spray, open the plasma apparatus power supply earlier and have the sample of tack coat, make it reach 250 ℃ with the flame preheating, open the powder feeder switch then, carry out the reaction spray coating metal titanium, cobalt and boron carbide-mixed thermal spraying powder, thickness are 250 microns;
(5) sample behind the reactive spray is carried out atmospheric heat under 900 ℃ and handled 5 hours, take out behind the furnace cooling.
The MPX-2000 type pin disc type wear test machine test wear quality that present embodiment uses Xuanhua, Hebei Tai Hua machine works to produce, wearing-in period is 15 minutes, the average abrasion amount is 11.35 milligrams.
Embodiment 2
(1) the spraying sample is prepared: selecting medium carbon steel for use is body material, and line cuts into diameter 40mm, and thickness 3mm disk cleans the rear surface through 800 order silicon-dioxide waterproof abrasive paper wet-millings 30 minutes with acetone, dries up the surface with hair dryer then;
(2) fix sample with anchor clamps, open the plasma apparatus power supply earlier, with the pre-hot basal body of plasma flame, make substrate temperature reach 350 ℃, and then open the powder feeder switch, the spraying tack coat sprays the MCrAlY tack coat then, and thickness is 80 microns;
(3) sample that will spray tack coat takes off, and under the protective atmosphere of argon gas, puts into vacuum carbon tube furnace and carries out vacuum heat treatment 24 hours at 1000 ℃, makes the diffusion of tack coat alloy material evenly, takes out behind the furnace cooling;
(4) adjust device parameter: 100g reactive spray mixed thermal spraying powder is packed in the powder feeder into 56gTi powder wherein, 20gCo powder and 24gB
4The C powder, adjusting the plasma apparatus electric current then is 550A, ion gas H
2Flow is 30L/h, powder sending quantity is 25r/min, spray distance is 100mm, sample after the thermal treatment is carried out reactive spray, open the plasma apparatus power supply earlier and have the sample of tack coat, make it reach 350 ℃ with the flame preheating, open the powder feeder switch then, carry out the reaction spray coating metal titanium, cobalt and boron carbide-mixed thermal spraying powder, thickness are 270 microns;
(5) sample behind the reactive spray is carried out atmospheric heat under 1000 ℃ and handled 10 hours, take out behind the furnace cooling.
The MPX-2000 type pin disc type wear test machine test wear quality that present embodiment uses Xuanhua, Hebei Tai Hua machine works to produce, wearing-in period is 15 minutes, the average abrasion amount is 22.70 milligrams.
Embodiment 3
(1) the spraying sample is prepared: selecting medium carbon steel for use is body material, and line cuts into diameter 40mm, and thickness 3mm disk cleans the rear surface through 800 order silicon-dioxide waterproof abrasive paper wet-millings 20 minutes with acetone, dries up the surface with hair dryer then;
(2) fix sample with anchor clamps, open the plasma apparatus power supply earlier, with the pre-hot basal body of plasma flame, make substrate temperature reach 300 ℃, and then open the powder feeder switch, the spraying tack coat sprays the MCrAlY tack coat then, and thickness is 60 microns;
(3) sample that will spray tack coat takes off, and under the protective atmosphere of argon gas, puts into vacuum carbon tube furnace and carries out vacuum heat treatment 20 hours at 950 ℃, makes the diffusion of tack coat alloy material evenly, takes out behind the furnace cooling;
(4) adjust device parameter: 100g reactive spray mixed thermal spraying powder is packed in the powder feeder into 59.8gTi powder wherein, 18gCo powder and 22.2gB
4The C powder, adjusting the plasma apparatus electric current then is 600A, ion gas H
2Flow is 30L/h, powder sending quantity is 15r/min, spray distance is 160mm, sample after the thermal treatment is carried out reactive spray, open the plasma apparatus power supply earlier and have the sample of tack coat, make it reach 300 ℃ with the flame preheating, open the powder feeder switch then, carry out the reaction spray coating metal titanium, cobalt and boron carbide-mixed thermal spraying powder, thickness are 260 microns;
(5) sample behind the reactive spray is carried out atmospheric heat under 950 ℃ and handled 8 hours, take out behind the furnace cooling.
The MPX-2000 type pin disc type wear test machine test wear quality that present embodiment uses Xuanhua, Hebei Tai Hua machine works to produce, wearing-in period is 15 minutes, the average abrasion amount is 11.95 milligrams.
Claims (9)
1, the method for a kind of reaction spray coating metal titanium, cobalt and boron carbide-mixed thermal spraying powder is characterized in that, may further comprise the steps:
The first step, the spraying sample is prepared: selecting medium carbon steel for use is body material, and line cuts into disk, cleans the rear surface through fine grinding with acetone, dries up at last;
Second step fixed sample with anchor clamps, opened the plasma apparatus power supply earlier, with the pre-hot basal body of plasma flame, and then opened the powder feeder switch, the spraying tack coat, and thickness is the 50-80 micron;
The 3rd step, the sample that has sprayed tack coat is taken off, put into vacuum carbon tube furnace and carry out vacuum heat treatment, make the diffusion of tack coat alloy material evenly, furnace cooling;
The 4th step, the reactive spray hot spray powder is packed in the powder feeder, adjusting the plasma apparatus electric current then is 500A-600A, ion gas H
2Flow is 20L/h-40L/h, powder sending quantity is 15r/min-25r/min, spray distance is 100mm-160mm, sample after the thermal treatment is carried out reactive spray, open the plasma apparatus power supply earlier and have the sample of tack coat, open the powder feeder switch then, carry out the reaction spray coating metal titanium with the flame preheating, cobalt and boron carbide-mixed thermal spraying powder, thickness are the 250-270 micron;
The 5th step, the sample behind the reactive spray is carried out atmospheric heat handle in cabinet-type electric furnace, reduce the thermal stresses of coating, furnace cooling.
2, the method for reaction spray coating metal titanium according to claim 1, cobalt and boron carbide-mixed thermal spraying powder is characterized in that, in the first step, described fine grinding, be with silicon-dioxide water sand, grind off the rust staining and the oxide skin of substrate material surface, its time is 10 minutes-30 minutes.
3, the method for reaction spray coating metal titanium according to claim 1, cobalt and boron carbide-mixed thermal spraying powder is characterized in that, in second step, and described preheating, its substrate temperature is 250 ℃-350 ℃.
According to the method for claim 1 or 3 described reaction spray coating metal titaniums, cobalt and boron carbide-mixed thermal spraying powder, it is characterized in that 4, in second step, described tack coat, its material are MCrAlY.
5, the method for reaction spray coating metal titanium according to claim 1, cobalt and boron carbide-mixed thermal spraying powder is characterized in that, in the 3rd step, described vacuum heat treatment is carried out in the protective atmosphere of argon gas.
6, the method for reaction spray coating metal titanium, cobalt and boron carbide-mixed thermal spraying powder according to claim 1 or 5 is characterized in that, in the 3rd step, described vacuum heat treatment, its temperature are 900 ℃-1000 ℃, and the time is 10 hours-24 hours.
7, the method for reaction spray coating metal titanium according to claim 1, cobalt and boron carbide-mixed thermal spraying powder is characterized in that, in the 4th step, and described preheating, its substrate temperature is 250 ℃-350 ℃.
8, the method for reaction spray coating metal titanium according to claim 1, cobalt and boron carbide-mixed thermal spraying powder is characterized in that, in the 5th step, described atmospheric heat is handled, and is that sample is heat-treated under atmospheric environment.
According to the method for claim 1 or 8 described reaction spray coating metal titaniums, cobalt and boron carbide-mixed thermal spraying powder, it is characterized in that 9, in the 5th step, described atmospheric heat is handled, its temperature is 900 ℃-1000 ℃, and the time is 5-10 hour.
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| CNB200810040150XA CN100554491C (en) | 2008-07-03 | 2008-07-03 | The method of reaction spray coating metal titanium, cobalt and boron carbide-mixed thermal spraying powder |
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| CNB200810040150XA CN100554491C (en) | 2008-07-03 | 2008-07-03 | The method of reaction spray coating metal titanium, cobalt and boron carbide-mixed thermal spraying powder |
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| CN101307420A true CN101307420A (en) | 2008-11-19 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104674217A (en) * | 2015-03-09 | 2015-06-03 | 河南普莱姆涂层科技有限公司 | Preparation method of thermal barrier coating containing bilayer structure of bonding layers |
| CN105850284A (en) * | 2015-01-22 | 2016-08-17 | 中国农业机械化科学研究院 | Seed coating machine master disc, manufacturing method thereof and rotary seed coating machine |
| CN108793958A (en) * | 2018-07-12 | 2018-11-13 | 刘少标 | A method of improving steel substrate surface wearable ceramic coat layer thermal shock resistance |
| CN111057420A (en) * | 2019-12-21 | 2020-04-24 | 杭州电子科技大学 | Anti-corrosion nano coating material of medical cobalt-chromium alloy and ion spraying method thereof |
-
2008
- 2008-07-03 CN CNB200810040150XA patent/CN100554491C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105850284A (en) * | 2015-01-22 | 2016-08-17 | 中国农业机械化科学研究院 | Seed coating machine master disc, manufacturing method thereof and rotary seed coating machine |
| CN104674217A (en) * | 2015-03-09 | 2015-06-03 | 河南普莱姆涂层科技有限公司 | Preparation method of thermal barrier coating containing bilayer structure of bonding layers |
| CN108793958A (en) * | 2018-07-12 | 2018-11-13 | 刘少标 | A method of improving steel substrate surface wearable ceramic coat layer thermal shock resistance |
| CN111057420A (en) * | 2019-12-21 | 2020-04-24 | 杭州电子科技大学 | Anti-corrosion nano coating material of medical cobalt-chromium alloy and ion spraying method thereof |
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| CN100554491C (en) | 2009-10-28 |
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