CN1276118C - Composite material layer melted and coated on surface of titanium alloy through laser - Google Patents
Composite material layer melted and coated on surface of titanium alloy through laser Download PDFInfo
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- CN1276118C CN1276118C CN 200410043941 CN200410043941A CN1276118C CN 1276118 C CN1276118 C CN 1276118C CN 200410043941 CN200410043941 CN 200410043941 CN 200410043941 A CN200410043941 A CN 200410043941A CN 1276118 C CN1276118 C CN 1276118C
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Abstract
The present invention provides a composite material layer melted and coated on the surface of a titanium alloy through laser, which relates to a coating material. A wild phase prepared by the existing coating material has the disadvantages of poor interface wettability, dispersivity and thermal stability, low binding strength, easy clustering and agglomeration, etc. The material of the present invention is prepared by mixing NiCrSi powder with B4 C powder which takes 2 wt % to 10 wt % of the NiCrSi powder. Since the material of the present invention can have chemical reactions in the process of preparing the coating layer, the wild phase generated in an original position has the advantages of favorable interface wettability, dispersivity and thermal stability, high binding strength, etc., and therefore, materials using the present invention can be used for preparing the composite coating layer having favorable performance.
Description
Technical field:
The invention belongs to the coating for metal surfaces technical field, is a kind of matrix material at the titanium alloy surface laser cladding coating.
Background technology:
Titanium alloy has higher specific tenacity, superior corrosion resistance and high-temperature behavior, is the widely used high performance material of aerospace department.But the frictional coefficient of titanium alloy is big, wear no resistance, and limited its range of application.Laser melting coating is a kind of of sufacing, its with laser beam as thermal source, at substrate material surface welding one deck novel material, thereby the obdurability of body material and wear-resisting, the corrosion-resistant and antioxidant property of wild phase material are organically combined, can improve the wear resisting property of metallic surface greatly.At present, carry out the titanium alloy surface laser cladding coating, the normal employing directly added SiC, ZrO
2, ceramic particles such as TiC, WC are as the method for wild phase.Directly the wild phase that adds have that the interface wetting property is bad, bonding strength is low, dispersiveness is bad, easy poly-partially and agglomerating, shortcoming such as thermostability is bad.
Summary of the invention:
The present invention exists at the existing wild phase that directly adds that the interface wetting property is bad, bonding strength is low, dispersiveness is bad, easy poly-partially and agglomerating, thermally-stabilised bad drawback, thereby a kind of titanium alloy surface laser cladding coating matrix material that can make performance adult's raising of laser coatings is provided, and titanium alloy surface laser cladding coating matrix material is by NiCrBSi powder and the B that accounts for NiCrBSi powder 2wt.%～10wt.%
4After mixing, the C powder is prepared from; In the described NiCrBSi powder, Ni:63～75wt.%, Cr:15～20wt.%, B:3～5wt.%, Si:3～6wt.%, Fe:3～5wt.%, C:1wt.%.The invention has the advantages that: TiB
2Have excellent wear-resisting, corrosion-resistant and antioxidant property and high chemical stability with the TiC stupalith, suitable to the hard ceramic wild phase in the laser melting coating compound coating.Because titanium alloy contains a large amount of Ti, Ti and B
4Chemical reaction can take place in C, generates TiB
2And TiC, so B
4C can be used as the starting material of self-formed from reaction wild phase in the laser cladding process.The wild phase of above-mentioned self-formed from reaction has good, the advantages such as bonding strength is high, good dispersity, Heat stability is good of interface wetting property, and the performance of laser coatings is improved greatly, and coating hardness reaches 3～4 times of titanium alloy.
Embodiment:
Embodiment one: it is the material Ti-6Al-4V that aerospace component generally adopts that present embodiment adopts base material, and the Ti of reaction in comes from Ti-6Al-4V like this.In order to slow down Ti and B
4The severe degree of C reaction adopts the method for adding the NiCrBSi powder, and to obtain the second best in quality compound coating, described NiCrBSi powder can be any NiCrBSi powder of selling on market, the B that is added
4The C powder accounts for NiCrBSi powder 2wt.%～10wt.%, B
4The C powder be prepared into titanium alloy surface laser cladding coating matrix material after the NiCrBSi powder mixes.
The preparation method of titanium alloy surface laser cladding coating matrix material is, with NiCrBSi powder and B
4The C powder is mixed in proportion, and mixes in the powder machine in drum-type then and mixes powder 10 hours, blendes together paste with the organic binder bond for preparing then, evenly brush on the titanium alloy workpiece surface, coat-thickness is controlled at about 0.8mm～1.2mm, and dries 2 hours down at 90 ℃, adopts CO
2Laser apparatus, selected laser cladding technological parameter is: laser output power 600～900W, laser beam spot diameter Ф 3～φ 6mm, laser scanning speed 3～8mm/s does not need argon gas (Ar) to purge protection in cladding process.The above-mentioned organic binder bond paste that the water of the polyvinyl alcohol that accounts for 1 part of volume parts and 2 parts mixes of serving as reasons.
In laser cladding process, the Ti element in the titanium alloy has entered in the molten bath in a large number.At high temperature, liquid Ti and solid B
4Chemical reaction can take place in the contact of C interface, generates TiB
2And TiC.Chemical equation is as follows:
Through laser melting coating, obtain TiB with self-formed from reaction
2With TiC be main, comprise the Ni base composite coating of various reinforced phase.
Embodiment two: the base material that present embodiment adopts is the material Ti-6Al-4V that aerospace component generally adopts.Workpiece is treated the cladding surface through the waterproof abrasive paper ground finish, and surface roughness Ra=0.2 μ m cleans up with acetone before the cladding.Pre-coating material adopts NiCrBSi+5wt.%B
4The C powder.The size range of NiCrBSi powder is 50～80 μ m, and fusing point is 1100 ℃, and its chemical ingredients sees Table 1.B
4The size range of C powder is 10～30 μ m, and fusing point is 2700 ℃.
The chemical ingredients of table 1 NiCrBSi alloy powder
| Composition | Ni | Cr | B | Si | Other |
| Weight-% | 65-72 | 14-16 | 5-6 | 4-5 | 4-9 |
With the precoating powder NiCrBSi+5wt.%B for preparing
4C mixes in the powder machine in drum-type and mixed powder 10 hours, blendes together paste with the organic binder bond for preparing then, evenly brushes at titanium alloy surface, and coat-thickness is controlled at about 0.8mm, and dries 2 hours down at 90 ℃.Adopt CO
2Laser apparatus, selected laser cladding technological parameter is: laser power 750W, spot diameter 3mm, sweep velocity 5mm/s purges protection without argon gas (Ar) in cladding process.
Behind the single track laser melting coating, coatingsurface is smooth, is dimpling shape, surperficial flawless and big pore.The cross-sectional width of coating is about 3.5mm, the about 0.9mm of maximum ga(u)ge.The interface of coating and titanium alloy is clear, and non-microcracked and inclusion is metallurgical binding, and intensity is very high.The microtexture homogeneous microstructure of coating, densification, flawless and pore are not found not clear inclusion yet.Compound coating is a matrix with the γ-Ni of the multiple element of super saturated solid solution, contains the high rigidity TiB that responds and produce
2With wild phases such as TiC.
Laser melting coating produces solution strengthening and refined crystalline strengthening effect, adds the high-hardness ceramic wild phase, makes the hardness ratio titanium alloy of Ni base composite coating improve a lot.The micro-vickers hardness test result of coating shows: the hardness of titanium alloy is HV330～HV340, and the hardness of coating is HV1200～HV1400.By the data contrast as can be seen, the hardness ratio titanium alloy of laser coatings is high a lot, is 3～4 times of titanium alloy.
Embodiment three: the difference of present embodiment and embodiment two is, in the selected NiCrBSi powder, Ni:63～75wt.%, Cr:15～20wt.%, B:3～5wt.%, Si:3～6wt.%, Fe:3～5wt.%, C:1wt.%, used B
4The C powder accounts for the 8wt.% of NiCrBSi powder.
Claims (1)
1. a titanium alloy surface laser cladding coating matrix material is characterized in that it is by NiCrBSi powder and the B that accounts for NiCrBSi powder 2wt.%～10wt.%
4After mixing, the C powder is prepared from; In the described NiCrBSi powder, Ni:63～75wt.%, Cr:15～20wt.%, B:3～5wt.%, Si:3～6wt.%, Fe:3～5wt.%, C:1wt.%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410043941 CN1276118C (en) | 2004-10-19 | 2004-10-19 | Composite material layer melted and coated on surface of titanium alloy through laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410043941 CN1276118C (en) | 2004-10-19 | 2004-10-19 | Composite material layer melted and coated on surface of titanium alloy through laser |
Publications (2)
| Publication Number | Publication Date |
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| CN1600891A CN1600891A (en) | 2005-03-30 |
| CN1276118C true CN1276118C (en) | 2006-09-20 |
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| CN 200410043941 Expired - Fee Related CN1276118C (en) | 2004-10-19 | 2004-10-19 | Composite material layer melted and coated on surface of titanium alloy through laser |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100431773C (en) * | 2005-11-17 | 2008-11-12 | 沈阳黎明航空发动机(集团)有限责任公司 | Laser melting rehabilitation method for titanium alloy thin-wall case |
| CN101863151A (en) * | 2010-05-31 | 2010-10-20 | 闵小兵 | Method for preparing metal compound plate by continuously and accurately compounding comprehensive protective material on thin substrate and metal compound plate thereof |
| CN101885115A (en) * | 2010-07-09 | 2010-11-17 | 天津工业大学 | Method for welding iron or iron alloy on high heat conduction metal matrix |
| CN102603301B (en) * | 2012-03-28 | 2013-06-05 | 无锡职业技术学院 | Preparation method for titanium alloy surface composite ceramic coating |
| CN103695898B (en) * | 2013-12-19 | 2016-02-24 | 山东大学 | A kind of titanium alloy surface cermet composite coating and preparation technology thereof |
| CN103774139A (en) * | 2014-01-21 | 2014-05-07 | 天津工业大学 | Method for strengthening surface of laser-clad titanium alloy |
| CN104005023B (en) * | 2014-06-06 | 2016-05-25 | 江苏大学 | Prepare the method for Ti-Al-Nb alloy coat in surface of metal titanium |
| CN105904167B (en) * | 2016-06-30 | 2017-11-03 | 哈尔滨工业大学 | The preparation method of the controllable wear-resistant coating of two-stage in-situ authigenic titanium alloy surface |
| CN106929843A (en) * | 2017-03-10 | 2017-07-07 | 安徽省伟业净化设备有限公司 | A kind of surface laser cladding method for manufacturing the titanium alloy material of surgical operating instrument |
| CN108070740B (en) * | 2017-12-28 | 2020-04-21 | 沈阳大陆激光技术有限公司 | Laser repair material for repairing titanium alloy valve core and valve seat |
| CN111809133B (en) * | 2020-07-23 | 2022-07-01 | 矿冶科技集团有限公司 | High-hardness nickel-based titanium carbide powder and preparation method thereof |
| CN112725791B (en) * | 2020-12-28 | 2022-09-27 | 华东交通大学 | TiB 2 /Fe 64 Ni 36 Composite coating and preparation method thereof |
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