CN101161864A - Ni3(Si,Ti)-WC composite coating material and preparation method thereof - Google Patents
Ni3(Si,Ti)-WC composite coating material and preparation method thereof Download PDFInfo
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- CN101161864A CN101161864A CN 200610104730 CN200610104730A CN101161864A CN 101161864 A CN101161864 A CN 101161864A CN 200610104730 CN200610104730 CN 200610104730 CN 200610104730 A CN200610104730 A CN 200610104730A CN 101161864 A CN101161864 A CN 101161864A
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Abstract
The present invention relates to a laser cladding nickel silicon titanium - tungsten carbide composite coating material and a method for preparation the same; the propose of the invention is to prepare a composite coating consisting of intermetallic compound of Ni3 (Si, Ti), a Ni-based solid solution, TiC coated WC ceramic on a high-temperature ultratek substrate by laser cladding; the coating material mainly comprises Ni powder, Si powder, Ti powder and WC powder with the following weight percentages: 8 percent to 20 percent WC, 78 percent Ni, 13 percent Si and 9 percent Ti; the preparation method adopts the laser to clad and has the following technique parameters: the output power is between 1200 W and 1500 W; the scanning speed is 4-8 mm/s; the spot diameter is 4 mm; the protective gas is Ar gas in cladding; the cladding substrate material is high-temperature ultratek; the invention has the following procedures: according to the mixing ratio, the coating material is mixed uniformly and pre-coated or hot-sprayed on the surface of the high-temperature ultratek substrate with the thickness between 0.8 mm and 1.0 mm; the laser scans cladding with multilayer and multi-path; each path has related joint of 1.8 mm, thereby achieving the cladding layer with different thickness.
Description
Technical field
The present invention relates to a kind of laser melting coating Ni 3 (Si, Ti)-WC composite coating material and preparation method thereof, particularly provide add ceramic phase and original position generation compound enhanced nickel three silicon titanium intermetallic compound coated materials of ceramic phase and laser melting coating preparation method thereof a kind of comprising simultaneously, belonged to the synthetic and coating preparation field of intermetallic compound based composite material.
Background technology
Intermetallic compound Ni
3Si has intensity-temperature anomaly effect, medium temperature intensity height, corrosion stability are good, in multiple media such as acidic solution, oxidisability corrosive medium, seawater, ammoniacal liquor, all has excellent corrosion resistance nature, can adopt the Ti element to its further alloying to improve its performance (T.Takasugi, M.Nagashima, O.Izumi, Strengthening and ductilization of Ni
3Si by the addition of Ti elements, Acta Metallurgica, 1990, v 38, n 5, p 747-755).Although structured material uses as a whole, Ni
3Still there is the insufficient problem of room temperature toughness in Si, but its high-temperature oxidation resistant and corrosion proof excellent properties, makes it possess working conditions as anti-corrosion coating.
The WC pottery has superior high-temperature behavior and polishing machine, is the main wild phase in Wimet and the thermal spraying material.As wild phase, because being difficult to original position, WC generates, so its adding mode is outer addition, promptly directly add WC ceramic particle (Chinese invention patent CN-1456707A).But directly the WC ceramic particle that adds easily peels off under external force, causes the decline of composite property.Metal titanium has extremely strong activity, easily the carbide ceramics reaction with fusing generates TiC (J.A.Folkes, K.Shibata, Laser claddingof Ti-6Al-4V with various carbide powders, Journal of Laser Applications, v 6, and n 2,1994, p 88-94).
Flue gas turbine expander is the large-scale rotating machinery that the petrochemical industry refinery is used for catalytic unit energy recovery unit, its key part blade (GH864) long term operation is at high temperature (about 700 ℃), at a high speed under the environment of (6000r/min) and flue gas flow, and working conditions is comparatively harsh.Laser melting and coating technique is at (the L.Shepeleva that has broad application prospects aspect the raising flue gas turbine expander blade work reliability, B.Medres, W.D.Kaplan, M.Bamberger and A.Weisheit, Laser cladding of turbine blades.Surface andCoatings Technology, 2000, v 125, n 1-3, p 45-48).
Summary of the invention
The object of the present invention is to provide a kind of nickel three silicon titanium intermetallic compound coated materials and preparation method thereof, peel off the problem of the decline that causes composite property to solve because of adding pottery, the advantage of laser melting coating and original position synthetic technology is organically combined, and laser melting coating prepares Ni on the nickel base superalloy matrix
3(Si, Ti) intermetallic compound, Ni based solid solution, TiC coat the compound coating that the WC pottery is formed.
The present invention is a kind of laser melting coating Ni 3 (Si, Ti)-WC composite coating material, and coated material mainly comprises Ni, Si, Ti and four kinds of powder of WC, its chemical ingredients by weight percentage: WC is 8%～20%, and surplus is Ni78Si13Ti9.
Above-described Ni 3 (Si, Ti)-WC composite coating material, Ni78Si13Ti9 is for carrying out Ni powder, Si powder and the Ti powder of proportioning by atomic percent.
Above-described Ni 3 (Si, Ti)-WC composite coating material, the B powder that also can add 5ppm carries out alloying, to suppress the fragility of coating.
Above-described Ni 3 (Si, Ti)-WC composite coating, be Ni main the composition mutually
3(Si, Ti) intermetallic compound, Ni based solid solution, TiC coat the WC ceramic phase.
The preparation method of Ni 3 (Si, Ti)-WC composite coating material, the processing parameter that adopts laser to carry out cladding is: output rating 1200-1500W, sweep velocity 4-8mm/s; spot diameter 4mm; shielding gas is an Ar gas during cladding, and the cladding body material is a nickel base superalloy, and its step is as follows:
(1) by the above proportioning, coated material is mixed, coating or thermospray are at nickel base superalloy matrix surface 0.8～1.0mm in advance;
(3) laser multilayer multiple tracks scanning cladding, per pass overlaps 1.8mm, can obtain the cladding layer of different thickness.
The present invention presets above-described coated material at the GH864 nickel base superalloy, adopts laser technology that fore-put powder is carried out cladding, and the fusing of WC ceramic segment also reacts the in-situ formation of TiC pottery with molten titanium in the coated material; Unreacted Ti with solid solution in Ni
3Among Si and the Ni, form Ni
3(Si, Ti) intermetallic compound and Ni-based sosoloid.
Usefulness of the present invention is: the interface combines well between ceramic phase and intermetallic compound; Cladding layer hardness height, high temperature resisting sulfide corrosion and erosion property are good.
Description of drawings
Fig. 1 organizes photo for the SEM of the synthetic Ni78Si13Ti9-8wt%WC of laser, Fig. 2 organizes photo for the SEM of the synthetic Ni78Si13Ti9-15wt%WC of laser, Fig. 3 organizes photo for the SEM of the synthetic Ni78Si13Ti9-20wt%WC of laser, and Fig. 4 is the XRD diffraction curve of the synthetic Ni78Si13Ti9-20wt%WC of laser.
Embodiment
Following examples employing equipment is TJ-HL-T5000 type CO
2Laser apparatus, shielding gas are Ar gas.Body material is cigarette turbine blade GH864 nickel base superalloy.
Embodiment 1:
(1) Ni powder, Si powder and Ti powder are that Ni78Si13Ti9 carries out proportioning by atomic percent; Adding weight percent is the WC particle of 8wt%; In addition, the B powder that adds 5ppm.
(2) purity of Ni powder, Si powder, Ti powder is greater than 99%, and powder size is 100～300 orders.
(3) mixed powder being put into the mortar ground and mixed evenly dries as coated material the back.Adopt the fore-put powder mode to carry out the cladding of laser multilayer multiple tracks.
(4) laser technical parameters is: output rating 1200-1300W, sweep velocity 4-8mm/s, spot diameter 4mm, per pass overlap joint 1.8mm.
The prepared about 1.0mm of cladding layer thickness, Vickers' hardness reaches 480Hv, and the ceramic phase volume mark is 3%, and as shown in Figure 1, it is Ni that coating is mainly organized
3(Si, Ti) intermetallic compound, Ni (Si) sosoloid and a small amount of irregular block WC and TiC ceramic phase.
Embodiment 2:
(1) Ni powder, Si powder and Ti powder are that Ni78Si13Ti9 carries out proportioning by atomic percent; Adding weight percent is the WC particle of 15wt%; In addition, the B powder that adds 5ppm.
(2) purity of Ni powder, Si powder, Ti powder is greater than 99%, and powder size is 100～300 orders.
(3) mixed powder being put into the mortar ground and mixed evenly dries as coated material the back.Adopt the fore-put powder mode to carry out the cladding of laser multilayer multiple tracks.
(4) laser technical parameters is: output rating 1300-1400W, sweep velocity 4-6mm/s, spot diameter 4mm, per pass overlap joint 1.8mm.
The prepared about 1.0mm of cladding layer thickness, Vickers' hardness reaches 520Hv, and the ceramic phase volume mark is 6%, and as shown in Figure 2, it is Ni that coating is mainly organized
3(Si, Ti) intermetallic compound, Ni (Si) sosoloid and petal-shaped TiC/WC composite ceramics phase.
Embodiment 3:
(1) Ni powder, Si powder and Ti powder are that Ni78Si13Ti9 carries out proportioning by atomic percent; Adding weight percent is the WC particle of 20wt%; In addition, the B powder that adds 5ppm.
(2) purity of Ni powder, Si powder, Ti powder is greater than 99%, and powder size is 100～300 orders.
(3) mixed powder being put into the mortar ground and mixed evenly dries as coated material the back.Adopt the fore-put powder mode to carry out the cladding of laser multilayer multiple tracks.
(4) laser technical parameters is: output rating 1400-1500W, sweep velocity 4-6mm/s, spot diameter 4mm, per pass overlap joint 1.8mm.
The prepared about 1.0mm of cladding layer thickness, Vickers' hardness reaches 540Hv, and the ceramic phase volume mark is 12%, and as shown in Figure 3, it is Ni that coating is mainly organized
3(Si, Ti) intermetallic compound, Ni (Si) sosoloid, irregular WC and petal-shaped TiC coat the WC composite ceramics mutually.
Claims (5)
1. laser melting coating Ni 3 (Si, Ti)-WC composite coating material, it is characterized in that: coated material mainly comprises Ni, Si, Ti and four kinds of powder of WC, its chemical ingredients by weight percentage: WC is 8%～20%, and surplus is Ni78Si13Ti9.
2. Ni 3 (Si, Ti)-WC composite coating material according to claim 1 is characterized in that: Ni78Si13Ti9 is for carrying out Ni powder, Si powder and the Ti powder of proportioning by atomic percent.
3. Ni 3 (Si, Ti)-WC composite coating material according to claim 1 is characterized in that: the B powder that also can add 5ppm carries out alloying, to suppress the fragility of coating.
4. according to claim 1 or 3 described Ni 3 (Si, Ti)-WC composite coatings, it is characterized in that: be Ni3 (Si, Ti) intermetallic compound, Ni based solid solution, TiC coating WC ceramic phase main the composition mutually.
5. the preparation method of Ni 3 (Si, Ti)-WC composite coating material, the processing parameter that adopts laser to carry out cladding is: output rating 1200-1500W, sweep velocity 4-8mm/s; spot diameter 4mm; shielding gas is an Ar gas during cladding, and the cladding body material is a nickel base superalloy, and its step is as follows:
(1) by the described proportioning of claim 1, coated material is mixed, coating or thermospray are at nickel base superalloy matrix surface 0.8～1.0mm in advance;
(2) laser multilayer multiple tracks scanning cladding, per pass overlaps 1.8mm, can obtain the cladding layer of different thickness.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101748403A (en) * | 2009-12-28 | 2010-06-23 | 天津大族烨峤激光技术有限公司 | Composite strengthening method of anti-wear plate |
| CN103668188A (en) * | 2013-12-31 | 2014-03-26 | 无锡透平叶片有限公司 | Water-erosion preventing method for turbine blade by laser cladding |
| CN103726045A (en) * | 2012-10-15 | 2014-04-16 | 中国科学院兰州化学物理研究所 | Nickel and silicon intermetallic compound based composite coat making method |
| CN104195550A (en) * | 2014-09-12 | 2014-12-10 | 天津工业大学 | Preparation method of WC-NiSiB laser cladding material |
| CN104502257A (en) * | 2014-11-05 | 2015-04-08 | 中国人民解放军第二炮兵工程大学 | Adhesive-corrosion-resistant performance detection method for solid self-lubricating coating |
| CN106031948A (en) * | 2015-03-11 | 2016-10-19 | 南京中科煜宸激光技术有限公司 | Laser cladding powder and a method of preparing the same |
| CN106702306A (en) * | 2016-11-17 | 2017-05-24 | 北京交通大学 | TiC-enhanced high-temperature-alloy-based high temperature wear-resisting composite material and preparation method |
| CN112144058A (en) * | 2020-09-24 | 2020-12-29 | 安徽中科春谷激光产业技术研究院有限公司 | Method for cladding tungsten carbide layer on surface of workpiece substrate |
-
2006
- 2006-10-10 CN CN 200610104730 patent/CN101161864A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101748403A (en) * | 2009-12-28 | 2010-06-23 | 天津大族烨峤激光技术有限公司 | Composite strengthening method of anti-wear plate |
| CN103726045A (en) * | 2012-10-15 | 2014-04-16 | 中国科学院兰州化学物理研究所 | Nickel and silicon intermetallic compound based composite coat making method |
| CN103668188A (en) * | 2013-12-31 | 2014-03-26 | 无锡透平叶片有限公司 | Water-erosion preventing method for turbine blade by laser cladding |
| CN103668188B (en) * | 2013-12-31 | 2016-03-30 | 无锡透平叶片有限公司 | A kind of turbine blade laser melting coating waterproof etching method |
| CN104195550A (en) * | 2014-09-12 | 2014-12-10 | 天津工业大学 | Preparation method of WC-NiSiB laser cladding material |
| CN104502257A (en) * | 2014-11-05 | 2015-04-08 | 中国人民解放军第二炮兵工程大学 | Adhesive-corrosion-resistant performance detection method for solid self-lubricating coating |
| CN104502257B (en) * | 2014-11-05 | 2017-02-15 | 中国人民解放军第二炮兵工程大学 | Adhesive-corrosion-resistant performance detection method for solid self-lubricating coating |
| CN106031948A (en) * | 2015-03-11 | 2016-10-19 | 南京中科煜宸激光技术有限公司 | Laser cladding powder and a method of preparing the same |
| CN106702306A (en) * | 2016-11-17 | 2017-05-24 | 北京交通大学 | TiC-enhanced high-temperature-alloy-based high temperature wear-resisting composite material and preparation method |
| CN112144058A (en) * | 2020-09-24 | 2020-12-29 | 安徽中科春谷激光产业技术研究院有限公司 | Method for cladding tungsten carbide layer on surface of workpiece substrate |
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