CN1287001C - Titanium-ferrum-carbon series reactive spraying composite powder and preparation process thereof - Google Patents
Titanium-ferrum-carbon series reactive spraying composite powder and preparation process thereof Download PDFInfo
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- CN1287001C CN1287001C CNB2003101172628A CN200310117262A CN1287001C CN 1287001 C CN1287001 C CN 1287001C CN B2003101172628 A CNB2003101172628 A CN B2003101172628A CN 200310117262 A CN200310117262 A CN 200310117262A CN 1287001 C CN1287001 C CN 1287001C
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Abstract
The present invention relates to a Ti-Fe-C reactive spraying composite powder and a preparing process thereof, which belongs to the process of the powder preparation of a technique for preparing metal-ceramic composite coatings. The present invention is characterized in that a carbon precursor is used and is carbonized at certain temperature, and the Ti-Fe-C reactive spraying composite powder whose raw material powder periphery is coated by carbon is formed. The composite powder comprises the components and the alloy elements measured by mass percentage: 36.5% to 52% of Ti, 23% to 58% of Fe, 9 to 13% of C; 0 to 14% of Cr, 0 to 10% of Ni, 0 to 2% of Mo, 0 to 2% of Si and 0 to 0.5% of B. the preparing process comprises the concrete technological steps: mixing and ball-milling raw material powders according to proportion, baking the mixed powder, heating, stirring and mixing the mixed powder with petroleum asphalt, carbonizing the mixture of the mixed powder and the petroleum asphalt, breaking and sieving the carbonized mixture. The present invention has the advantages that the separation problem of the reactive components in reactive spray powders when carbide metallic composite coatings are prepared by a reactive hot spraying method at present, and the quality of the carbide metallic spraying composite coatings is improved.
Description
Technical field:
The invention belongs to the flouring technology in the cermet composite coating technology of preparing, specially refer to TiC/Fe alloyed metal-ceramic composite coating.
Background technology:
Cermet composite coating, especially be with the carbide wild phase the wear member of cermet composite coating in fields such as Aeronautics and Astronautics, metallurgy, mine, oil and chemical industry manufacturing and repair in have purposes widely; High temperature resistant carbide (TiC, Cr
2C
3Deng) compound coating formed with resistance to oxidation, corrosion resistant alloy (abros, iron-base anti-corrosion alloy etc.) is owing to have performances such as high temperature resistant, anti-oxidant, corrosion-resistant, wear-resistant concurrently simultaneously, in fields such as metallurgy, heat power plants prior using value arranged.At present, be that ceramic phase in the cermet composite coating of wild phase adopts usually and adds the compound mode in advance in spraying starting material (powder, silk material etc.) with the carbide, ceramic phase skewness in the coating, granularity is thicker, ceramic/metal bonding interface vulnerable to pollution, this will influence the performance of coating greatly.Produced the ceramic-metallic novel method of a kind of preparation---reaction thermal spraying in recent years, it combines SHS technology and thermospray, utilizes the thermopositive reaction between powder and the powder, finishes the synthetic and deposition of material in spraying process simultaneously.The reaction heat of emitting in the reaction in building-up process, can improve spraying temperature, reduce the porosity of coating, improve coating and matrix bond: and original position synthetic hard is tiny circular granular mutually, be uniformly dispersed the bonding interface cleaning of hard and metallic matrix.Therefore reaction thermal spraying has overcome the shortcoming of conventional spray paint cermetology, has incomparable advantage aspect the preparation cermet composite coating.
Existing suitable research aspect the cermet composite coating reaction thermal spraying both at home and abroad in recent years is especially to the research of TiC/Fe alloy compound coating.The 3rd interim narration the at J Uni Sci Technol Beijing in 2000 utilizes Reactive Flame to prepare the TiC/Fe compound coating; At 20 volumes of powder metallurgy technology in 2002, the 4th interim the introduction utilizes Reactive Flame to prepare the TiC/FeAl compound coating.But the reactive spray powder that it adopts all is simple mechanically mixing powder or reunion powder (adding a spot of binding agent granulates), reaction constituent element separate easily under the effect of high speed flame stream, cause quite a few constituent element powder fully to react, cause residual harmful phase in the coating, the tissue odds of coating is even, the coating quality instability makes the reaction thermal spraying technology really not obtain comprehensively to use in engineering reality.Therefore, can guarantee that the reactive spray composite powder technology of preparing of fully reacting between the reaction constituent element in the spraying process has become the key problem in technology that obtains high-quality reaction thermal spraying coating.
Summary of the invention:
The present invention is directed to reaction thermal spraying and prepare the reaction constituent element separation that exists in the TiC/Fe alloyed metal ceramic composite coating, the constituent element powder can't fully react, make the tissue odds of coating even, the coating quality problem of unstable, propose to adopt the presoma of carbon, through the carbonization under the certain temperature, form the Ti-Fe-C reacting spraying composite powder that raw material powder is coated by carbon on every side.Reaction constituent element separation problem in reactive spray powder when this will solve present reaction thermal spraying and prepare the carbide compound coating improves the quality of carbide metal reaction spraying compound coating.
The Ti-Fe-C reacting spraying composite powder utilizes the presoma of carbon as carbon source among the present invention, the one-tenth of composite powder is grouped into by mass percentage, Ti:36.5%～52% with pure titanium valve and the adding of titanium-iron powder dual mode, Fe:23%～58%, C:9～13%, alloying element mass percent are Cr:0～14%, Ni:0～10%, Mo:0～2%, Si:0～2%, B:0～0.5%.
Technological process of the present invention is: raw material powder mixes → carbonization → crushing and screening with the petroleum pitch heated and stirred by proportioning mixing and ball milling → mixed powder oven dry → mixed powder.Its concrete processing parameter is: the proportioning mixing and ball milling 12～72 hours that earlier with raw material powder by ball milling and ratio of grinding media to material is 3: 1～6: 1; Mixed powder in 45～60 ℃ of scopes, and dried 12～24 hours; Mixed powder and petroleum pitch are heated to 300～400 ℃ mix, oil pitch quality percentage ratio is 21%～34%; In the heat treatment furnace of nitrogen protection, under 550～650 ℃ of the temperature, carried out carbonizing treatment 2 hours; To the powder crushing and screening.
During ball milling, drum's speed of rotation is 100～150r.p.m, and ball milling method is wet-milling, and ball-milling medium is an alcohol.
The maximum characteristics of the present invention are that the presoma by carbon obtains through carbonization at a certain temperature, form carbon and are coated on clad structure around the raw material powder, and the cohesive strength height of raw material powder and carbon, not easily separated in spraying process, what help reacting finishes.Ball milling is for raw material powder particle size being reduced, being beneficial to the reaction in the spraying process; Nitrogen protection in the carbonization process can prevent the scaling loss of raw material powder oxidation and alloying element in the carbonization process; Simultaneously controlled temperature and time, can prevent from carbonization process, to generate TiC in advance, thereby improve the performance of coating.
Compared with prior art, the invention has the advantages that:
1, form carbon in the Ti-Fe-C reacting spraying composite powder of the present invention's preparation and be coated on raw material powder clad structure on every side, the cohesive strength height of raw material powder and carbon, not easily separated in spraying process, what help reacting finishes.
2, nothing is harmful mutually residual in Zhi Bei the hot spray coating, and homogeneous microstructure.Coatingsurface hardness (HRC) is more than 55, and wear resistance is better than conventional Ni60 wear-resistant coating.
Description of drawings:
Fig. 1 is a Ti-Fe-C reactive spray composite powder structure photo.
Fig. 2 is a compound coating back scattering pattern.
Fig. 3 is the XRDP of compound coating coating.
From Fig. 1 Ti-Fe-C reactive spray composite powder structure photo, can see in the Ti-Fe-C reactive spray composite powder of preparation, form carbon and be coated on tiny raw material powder clad structure on every side, the cohesive strength height of raw material powder and carbon, not easily separated in spraying process, what help reacting finishes; From Fig. 2 compound coating back scattering pattern, can see that the coating that obtains has typical thermospray pattern, and homogeneous microstructure; Can see that from the XRD result of Fig. 3 compound coating institute's coated component that obtains is simple, not have harmful mutually residual.
Embodiment:
Raw material of the present invention is Fe powder, Ti powder and TiFe powder, alloying element powder and petroleum pitch.Prepared Ti-Fe-C reacting spraying composite powder composition is as shown in table 1, and the raw material powder composition of selecting for use is as shown in table 2.
Its concrete technical process is:
1, raw material powder is mixed by composition proportion, wet-milling 24 hours on ball mill then, ratio of grinding media to material is 3: 1, and drum's speed of rotation is 120r.p.m, and ball-milling medium is an alcohol, and the ball milling mean particle size is 6～7 μ m;
2, the mixed powder behind the ball milling is dried in drying baker, bake out temperature is 50 ℃, and drying time is 12 hours;
3, petroleum pitch is heated to 350 ℃, the mixed powder of drying is joined in the petroleum liquid pitch and fully by composition proportion stir;
4, the material that stirs is put into the burning boat, in the nitrogen protection heat treatment furnace, carried out carbonizing treatment at a certain temperature 2 hours then;
5, the porous block solid that obtains after the carbonization is carried out fragmentation, the dusty spray that requires granularity is prepared in screening.
Table 1 has provided several preferred embodiments of the present invention:
Table 1 preferred embodiment
| Preferred embodiment | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | Embodiment 7 | |||
| Ti-Fe-C reacting spraying composite powder composition | Ti mass percent (%) | 37.3 | 37.3 | 50.3 | 50.3 | 41.5 | 41.5 | 41.5 | ||
| The adding mode of Ti | Pure titanium valve | The 1# titanium-iron powder | Pure titanium valve | The 2# titanium-iron powder | The 1# titanium-iron powder | Pure titanium valve | The 2# titanium-iron powder | |||
| Fe mass percent (%) | 53.6 | 41.3 | 37.1 | 24.8 | 23.1 | 23.1 | 23.1 | |||
| C mass percent (%) | 9.1 | 9.1 | 12.6 | 12.6 | 10.4 | 10.4 | 10.4 | |||
| Alloying element quality percentage composition (%) | Cr | 0 | 6 | 0 | 6 | 12.4 | 12.4 | 12.4 | ||
| Ni | 0 | 4 | 0 | 4 | 8.2 | 8.2 | 8.2 | |||
| Mo | 0 | 1 | 0 | 1 | 2 | 2 | 2 | |||
| Si | 0 | 1 | 0 | 1 | 2 | 2 | 2 | |||
| B | 0 | 0.3 | 0 | 0.3 | 0.4 | 0.4 | 0.4 | |||
| The mass percent of petroleum pitch (%) | 21.3 | 21.3 | 32.5 | 32.5 | 25.0 | 25.0 | 25.0 | |||
| The carbonization technique parameter | Temperature (℃) | 550 | 550 | 650 | 650 | 550 | 550 | 550 | ||
| Soaking time (h) | 2 | 2 | 2 | 2 | 2 | 2 | 2 | |||
| Spraying method | The spraying of acetylene flame | The spraying of acetylene flame | Plasma spraying | Plasma spraying | The spraying of acetylene flame | The spraying of acetylene flame | Plasma spraying | |||
| The coatingsurface Rockwell hardness | 59.5 | 60.1 | 60.8 | 62.7 | 57.5 | 59.1 | 62.1 | |||
| Coating wear resistance (comparing) with conventional Ni60 coating | 4 times | 5 times | 3 times | 3 times | 8 times | 7 times | 12 times | |||
The chemical ingredients of table 2 raw material powder (wt.%)
In sum, adopt the Ti-Fe-C reacting spraying composite powder of method preparation of the present invention, can prepare hardness and wear resistance good metal ceramic composite coating.
Claims (4)
1, a kind of titanium-iron-carbon reacting spraying composite powder, it is characterized in that the presoma that utilizes carbon forms the structure that raw material powder is coated by carbon on every side as carbon source, the moiety of composite powder is by mass percentage: Ti:36.5%～52% that adds in the mode of pure titanium valve or titanium-iron powder, Fe:23%～58%, C:9～13%, alloying element mass percent are Cr:0～14%, Ni:0～10%, Mo:0～2%, Si:0～2%, B:0～0.5%.
2, titanium-iron as claimed in claim 1-carbon reacting spraying composite powder is characterized in that, the presoma of carbon is a petroleum pitch.
3, the method for the preparation of titanium-iron-carbon reacting spraying composite powder described in a kind of claim 1 may further comprise the steps:
1) with raw material powder is 3: 1～6: 1 proportioning mixing and ball milling 12～72 hours by ball milling and ratio of grinding media to material;
2) mixed powder in 45～60 ℃ of scopes, and dried 12～24 hours;
3) mixed powder and petroleum pitch are heated to 300～400 ℃ and mix, oil pitch quality percentage ratio is 21%～34%;
4) in the heat treatment furnace of nitrogen protection, under 550～650 ℃ of the temperature, carried out carbonizing treatment 2 hours;
5) to the powder crushing and screening.
4, the method for preparing titanium-iron-carbon reacting spraying composite powder as claimed in claim 2 is characterized in that drum's speed of rotation is 100～150r.p.m, and ball milling method is wet-milling, and ball-milling medium is an alcohol.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2003101172628A CN1287001C (en) | 2003-12-10 | 2003-12-10 | Titanium-ferrum-carbon series reactive spraying composite powder and preparation process thereof |
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| CNB2003101172628A CN1287001C (en) | 2003-12-10 | 2003-12-10 | Titanium-ferrum-carbon series reactive spraying composite powder and preparation process thereof |
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| CN1546720A CN1546720A (en) | 2004-11-17 |
| CN1287001C true CN1287001C (en) | 2006-11-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101255557B (en) * | 2008-03-11 | 2010-06-02 | 潍坊学院 | Synthetic reaction plasma cladding powder and preparation technique thereof |
| CN102277550A (en) * | 2011-08-15 | 2011-12-14 | 北京工业大学 | Method for preparing cored wire for nickel-based coating and coating, and application |
| CN102978444B (en) * | 2012-11-27 | 2015-01-07 | 大连理工大学 | Nanocarbon clad titanium carbide enhanced nickel-based composite coating material and laser cladding process thereof |
| CN108247038B (en) * | 2018-01-30 | 2019-10-18 | 北京科技大学 | A kind of spherical titanium-iron-carbon reacting spraying composite powder and preparation method thereof |
| CN111809134A (en) * | 2020-07-23 | 2020-10-23 | 矿冶科技集团有限公司 | Novel titanium carbide-iron-nickel-chromium-silicon thermal spraying powder and preparation method thereof |
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