CN105386033A - Preparation method for forming particle and short fiber gradient structure on surface of Ti-6Al-4V alloy - Google Patents
Preparation method for forming particle and short fiber gradient structure on surface of Ti-6Al-4V alloy Download PDFInfo
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- CN105386033A CN105386033A CN201510729560.5A CN201510729560A CN105386033A CN 105386033 A CN105386033 A CN 105386033A CN 201510729560 A CN201510729560 A CN 201510729560A CN 105386033 A CN105386033 A CN 105386033A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
Abstract
The invention provides a preparation method for forming a particle and short fiber gradient structure on the surface of a Ti-6Al-4V alloy. The problems that a treated surface is poor in forming, crack sensitivity is high, a surface layer is thin and prone to falling off, and a gradient structure is hard to form are solved. The preparation method comprises the steps that firstly TiB2 powder and Ti powder are evenly mixed and pre-arranged on the surface of Ti-6Al-4V; then a sample is preheated to 300-350 DEG C, and temperature is kept stable; and finally an optical fiber laser is used for preparing a composite coating on the surface of the Ti-6Al-4V alloy. The thickness of the composite coating is above 1.5 mm, the structure is dense, no air hole or crack exists, and good metallurgical bonding of the composite coating and the Ti-6Al-4V alloy is achieved. The number of particles of the composite coating is gradually lowered from outside to inside, the number of short fibers of the composite coating is gradually increased, and the draw ratio of the short fibers can be more than 10 times. The integral comprehensive performance of materials is improved by improving the structural distribution of the surface layers of the materials, and therefore the service life of the materials is prolonged.
Description
Technical field
The present invention relates to the process for treating surface forming particle and staple fibre structure at Ti-6Al-4V alloy surface, specifically provide and produce compared with the preparation method of thick coating with more smooth macro morphology on Ti-6Al-4V surface, and make coating from outward appearance to inner essence TiB
2amounts of particles reduces gradually, and TiB staple fibre quantity increases gradually.
Background technology
At present, mainly contain in the preparation method of Ti-6Al-4V alloy surface formation particle and staple fibre gradient-structure:
1. plasma spraying
Plasma spraying utilizes plasma flame to melt or softening dusty spray, and rely on the grain bundle that the self power of plasma arc flame and additional compressed air stream become to spray to promote molten grain, is then ejected into Ti-6Al-4V surface with certain speed and forms coating.Advantage: the surface of workpiece to be machined can be made to form gradient structure coating.Shortcoming: surface irregularity is large, with base material bonding force is poor, coating is easy to crack.
2. chemical vapour deposition
Chemical Vapor deposition process deposits required compound by gas-phase reaction (thermolysis, reduction, displacement or chemical combination etc.) at Ti-6Al-4V alloy surface.Advantage: accurately can control phase composite, obtains fine and close compound coating.Shortcoming: the thinner thickness of settled layer, usually only below 100 μm.
3. electric spark deposition
Electric spark deposition is the high temperature, the high pressure area that utilize the pulse differential of the arc that formed between rotating electrode and Ti-6Al-4V alloy and high instantaneous energy impulsive discharge to produce plasma state, electrode materials is melted and is transitioned into a kind of process for treating surface forming alloying strengthening layer in micro-molten matrix surface molten bath.Advantage: by repeatedly repeatedly depositing, can obtain thicker gradient structure coating.Shortcoming: complicated operation, higher to processing requirement, primary depositing can not be too thick, causes being unfavorable for large scale application.
4. Laser Surface Treatment
Laser Surface Treatment refers to that adopting laser to carry out irradiation to Ti-6Al-4V surface makes it to melt and alloy element or reinforcing particle etc. be added into the surface treatment method being formed in molten bath and have certain thickness strengthening layer simultaneously.Advantage: can form thicker coating, and obtain gradient structure coating is simultaneously high with substrate interface bonding strength.Shortcoming: processed surface forming is of poor quality, and coating crack susceptibility is high.
In above-mentioned several technology of preparing, laser technology comparatively easily obtains surperficial thickness, dense structure, and be the advantage of good metallurgical binding with base material.This high-energy-density with laser and rapid melting, cooling characteristic are directly related.Due to the direct exposed material surface of laser, under the effect of heat trnasfer, material melts direction is passed gradually along internal layer, and again due to the chilling action of base material, making to solidify direction is first pass from bottom outer layers.According to this characteristic, the compound coating of strengthening phase Gradient distribution can be prepared by reasonable component design and craft coupling.But, after material composition is determined, reasonable process parameter will become main restricting factor beyond the question.On the one hand, laser energy density is too low, can cause forming thicker compound coating, and can reduce the carrying out of reaction in－situ, easily makes the remaining more defect of coat inside, as pore and crackle; On the other hand, laser energy density is excessive, and a large amount of base material can be caused to be melted, and molten bath life, molten bath flowing is violent, easily forms strengthening phase and distributes more uniformly.Therefore, how to prepare gradient structure composite coating by material composition design and craft coupling and become the key issue needing to solve.
TiB
2pottery has the advantages such as high rigidity, high elastic coefficient and high chemical stability, makes TiB
2coating has very excellent antistick polishing machine.But, TiB
2the toughness of pottery is poor, makes TiB
2coating anti-fatigue performance easily worsens, and becomes TiB
2coating is moved towards " short slab " of industrial application.And TiB staple fibre due to length-to-diameter ratio large, the defect that TiB internal structure is contained is lower, is conducive to the raising of fracture toughness property.In recent years, a large amount of scholar's research shows, the coatings of formation goes out hard, the inner soft feature in top layer and will more be conducive to the raising of wear resisting property.But, due to TiB
2the high-melting-point (3253 DEG C) of pottery and high fusion enthalpy (83.97kJ/mol), cause adopting laser technology to prepare compound coating, easily form the compound coating of surface in significant depressions.
Summary of the invention
The object of the invention is to provide a kind of preparation method forming particle and staple fibre gradient-structure at Ti-6Al-4V alloy surface, and the processed surface forming existed in solution prior art is poor, crack sensitivity is large, upper layer is thin, top layer easily comes off and be difficult to form the problems such as gradient-structure.
For solving the problems of the technologies described above, technical scheme of the present invention is:
To the sand papering of Ti-6Al-4V alloy surface, rust cleaning, oil removing, obtain smooth bright and clean surface; Then by TiB
2with Ti powder in mass ratio for 3:2 carries out mechanically mixing, and fully mix with 2123 resol, and reconcile into even paste, paste is coated in Ti-6Al-4V surface to be processed in advance, and the add-on of 2123 resol is TiB
2with 2% ~ 3% of Ti powder quality; Coating thickness is 0.5 ~ 0.6mm, and be then placed in loft drier oven dry 15 ~ 20h for subsequent use, bake out temperature is 100 ~ 150 DEG C.
Before laser processing, adopt process furnace that the Ti-6Al-4V alloy of pre-postpone is preheating to 300 ~ 350 DEG C, and keep temperature-stable; Optical fiber laser is finally adopted to process Ti-6Al-4V surface initialization layer.
In order to obtain the compound coating more than more than 1.5mm thickness and obvious gradient-structure, appropriate processing parameter need be selected could to obtain satisfactory coating.Given this, laser technical parameters of the present invention is: laser power 2.4 ~ 2.6kW, sweep velocity 5.5 ~ 6.5mm/s; Spot diameter 5 × 5mm; Argon flow amount is 10 ~ 15L/min.
Further, step (2) TiB
2be all 3 ~ 5 μm with the particle diameter of Ti powder.
After adopting such scheme, the beneficial effect that the present invention obtains is: the macro morphology of compound coating is more smooth; Coat-thickness is more than 1.5mm, and coating structure is fine and close, pore-free and crackle, and bonding interface is good metallurgical binding.Meanwhile, compound coating is from table to inner TiB
2amounts of particles reduces gradually, and TiB staple fibre quantity increases gradually.
Accompanying drawing explanation
Fig. 1: compound coating cross section macro morphology after embodiment 1.
Fig. 2: after embodiment 1, compound coating is from table to inner microstructure, and wherein a is compound coating top layer, and b is in the middle part of compound coating, and c is bottom compound coating.
Fig. 3: after embodiment 1, compound coating is from table and inner microhardness.
Fig. 4: compound coating abrasion loss under 200N load, 480 revs/min of dry sliding wear conditions after embodiment 1
Embodiment
The present invention will be described further with regard to following examples.TiB
2be all 3 ~ 5 μm with the particle diameter of Ti powder.
Embodiment 1:
To the sand papering of Ti-6Al-4V alloy surface, rust cleaning, oil removing, obtain smooth bright and clean surface; Then by TiB
2with Ti powder in mass ratio for 3:2 carries out mechanically mixing, and fully mix with 2123 resol, and reconcile into even paste, resol is TiB
2with 2% of Ti total mass; Following painting cream is coated in Ti-6Al-4V surface to be processed in advance, and coating thickness is 0.5mm, and be then placed in loft drier oven dry 15h for subsequent use, bake out temperature is 150 DEG C.
Before laser processing, adopt process furnace that the Ti-6Al-4V alloy of pre-postpone is preheating to 300 DEG C, and keep temperature-stable; IPG optical fiber laser is finally adopted to process Ti-6Al-4V surface initialization layer.Laser technical parameters is: laser power 2.4kW, sweep velocity 5.5mm/s; Spot diameter 5 × 5mm; Argon flow amount is 15L/min.
Embodiment 2:
To the sand papering of Ti-6Al-4V alloy surface, rust cleaning, oil removing, obtain smooth bright and clean surface; Then by TiB
2with Ti powder in mass ratio for 3:2 carries out mechanically mixing, and fully mix with 2123 resol, and reconcile into even paste, resol is TiB
2with 3% of Ti total mass; Following painting cream is coated in Ti-6Al-4V surface to be processed in advance, and coating thickness is 0.6mm, and be then placed in loft drier oven dry 20h for subsequent use, bake out temperature is 100 DEG C.
Before laser processing, adopt process furnace that the Ti-6Al-4V alloy of pre-postpone is preheating to 350 DEG C, and keep temperature-stable; IPG optical fiber laser is finally adopted to process Ti-6Al-4V surface initialization layer.Laser technical parameters is: laser power 2.6kW, sweep velocity 6.5mm/s; Spot diameter 5 × 5mm; Argon flow amount is 10L/min.
Embodiment 3:
To the sand papering of Ti-6Al-4V alloy surface, rust cleaning, oil removing, obtain smooth bright and clean surface; Then by TiB
2with Ti powder in mass ratio for 3:2 carries out mechanically mixing, and fully mix with 2123 resol, and reconcile into even paste, resol is TiB
2with 2.5% of Ti total mass; Following painting cream is coated in Ti-6Al-4V surface to be processed in advance, and coating thickness is 0.55mm, and be then placed in loft drier oven dry 28h for subsequent use, bake out temperature is 125 DEG C.
Before laser processing, adopt process furnace that the Ti-6Al-4V alloy of pre-postpone is preheating to 325 DEG C, and keep temperature-stable; IPG optical fiber laser is finally adopted to process Ti-6Al-4V surface initialization layer.Laser technical parameters is: laser power 2.5kW, sweep velocity 6mm/s; Spot diameter 5 × 5mm; Argon flow amount is 13L/min.
Table 1: compound coating indentation crack length under the effect of 30kg indentation load after embodiment 1
Claims (2)
1. form a preparation method for particle and staple fibre gradient structure coating at Ti-6Al-4V alloy surface, it is characterized in that, comprise the steps:
(1) to the sand papering of Ti-6Al-4V alloy surface, rust cleaning, oil removing, smooth bright and clean surface is obtained;
(2) by TiB
2mechanically mixing is carried out according to proportioning, TiB with Ti powder
2be 3:2 with Ti powder quality ratio; And fully mix with 2123 resol, and reconciling into even paste, resol is TiB
2with 2% ~ 3% of Ti total mass; Paste is coated in Ti-6Al-4V surface to be processed in advance, and coating thickness is 0.5 ~ 0.6mm, and be then placed in loft drier oven dry 15 ~ 20h for subsequent use, bake out temperature is 100 ~ 150 DEG C;
(3) before processing, adopt process furnace to be carried out being preheating to 300 ~ 350 DEG C by the Ti-6Al-4V alloy of pre-postpone, and keep temperature-stable;
(4) thermal source is adopted to process Ti-6Al-4V surface initialization layer; Thermal source is fiber laser, and processing parameter is: laser power is 2.4 ~ 2.6kW, and sweep velocity is 5.5 ~ 6.5mm/s; Spot diameter is 5 × 5mm, and argon flow amount is 10 ~ 15L/min.
2. according to the method for claim 1, it is characterized in that, step (2) TiB
2be all 3 ~ 5 μm with the particle diameter of Ti powder.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109989059A (en) * | 2019-03-06 | 2019-07-09 | 莆田学院 | A kind of TiBw-Ti composite layer and its laser in-situ preparation method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4832993A (en) * | 1987-03-09 | 1989-05-23 | Alsthom | Method of applying a protective coating to a titanium alloy blade, and a blade obtained thereby |
| CN102011121A (en) * | 2010-05-02 | 2011-04-13 | 上海工程技术大学 | Large-area TiB-TiC reinforced titanium-based composite coating and preparation method thereof |
| CN103628056A (en) * | 2013-12-09 | 2014-03-12 | 山东建筑大学 | Material for TA15 titanium alloy surface laser cladding and laser cladding method |
| CN103774139A (en) * | 2014-01-21 | 2014-05-07 | 天津工业大学 | Method for strengthening surface of laser-clad titanium alloy |
| CN104480460A (en) * | 2014-11-24 | 2015-04-01 | 北京航空航天大学 | In-situ preparation of wear-resistant self-lubricating coating on surface of titanium alloy by laser cladding |
-
2015
- 2015-10-31 CN CN201510729560.5A patent/CN105386033A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4832993A (en) * | 1987-03-09 | 1989-05-23 | Alsthom | Method of applying a protective coating to a titanium alloy blade, and a blade obtained thereby |
| CN102011121A (en) * | 2010-05-02 | 2011-04-13 | 上海工程技术大学 | Large-area TiB-TiC reinforced titanium-based composite coating and preparation method thereof |
| CN103628056A (en) * | 2013-12-09 | 2014-03-12 | 山东建筑大学 | Material for TA15 titanium alloy surface laser cladding and laser cladding method |
| CN103774139A (en) * | 2014-01-21 | 2014-05-07 | 天津工业大学 | Method for strengthening surface of laser-clad titanium alloy |
| CN104480460A (en) * | 2014-11-24 | 2015-04-01 | 北京航空航天大学 | In-situ preparation of wear-resistant self-lubricating coating on surface of titanium alloy by laser cladding |
Non-Patent Citations (1)
| Title |
|---|
| 林英华等: "激光原位制备高体积分数与长径比的TiB短纤维与TiB2P增强钛基复合涂层", 《中国激光》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109989059A (en) * | 2019-03-06 | 2019-07-09 | 莆田学院 | A kind of TiBw-Ti composite layer and its laser in-situ preparation method |
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Application publication date: 20160309 |