CN106048497A - Abrasion resisting coating with high gamma-TiAl phase content and preparing method of abrasion resisting coating - Google Patents

Abrasion resisting coating with high gamma-TiAl phase content and preparing method of abrasion resisting coating Download PDF

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Publication number
CN106048497A
CN106048497A CN201610585806.0A CN201610585806A CN106048497A CN 106048497 A CN106048497 A CN 106048497A CN 201610585806 A CN201610585806 A CN 201610585806A CN 106048497 A CN106048497 A CN 106048497A
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China
Prior art keywords
phase content
coating
tial
abrasion
phase
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CN201610585806.0A
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Chinese (zh)
Inventor
王晓明
朱胜
韩国峰
张垚
赵阳
王启伟
任智强
常青
陈永星
周超极
徐安阳
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Academy of Armored Forces Engineering of PLA
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Academy of Armored Forces Engineering of PLA
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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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06—Metallic material
    • C23C4/08—Metallic material containing only metal elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C14/00—Alloys based on titanium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C30/00—Alloys containing less than 50% by weight of each constituent

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Coating By Spraying Or Casting (AREA)

Abstract

The invention discloses an abrasion resisting coating with the high gamma-TiAl phase content and a preparing method of the abrasion resisting coating. The coating comprises, by atomic percent, 42 at%-45 at% of Al, 5 at%-10 at% of Nb, 5 at%-10 at% of Cr and/or V, and the balance Ti. A phase of the coating comprises 75 wt%-90 wt% of a gamma-TiAl phase, 5 wt%-15 wt% of an alpha 2-Ti3Al phase and 5 wt%-10 wt% of a beta-Ti phase and is free of obvious oxygen/nitrogen impurity phases. According to the coating, intermediate alloy AlNb, AlV, AlCr and Al particles and Ti bars with the purity larger than or equal to 99.9% are mixed to manufacture spraying powder firstly, and then the spraying powder is sprayed to the surface of a magnesium alloy base body through the low-temperature supersonic spraying technology. According to the abrasion resisting coating, the powder material composition and grain size are optimized, and the abrasion resisting coating with the high gamma-TiAl phase content is finally prepared through the low-temperature supersonic spraying technology.

Description

Abrasion-resistant coatings of high γ-TiAl phase content and preparation method thereof
Technical field
The present invention relates to a kind of TiAl-base alloy coating and preparation method thereof, be specifically related to a kind of high γ-TiAl phase content Abrasion-resistant coatings and preparation method thereof.
Background technology
The density of Intermatallic Ti-Al compound, between pure titanium and fine aluminium, has a general characteristic of intermetallic compound: As both existed between atom, metallic bond there is also covalent bond, Binding Forces Between Atoms strengthens, chemical bond tends towards stability.Therefore, titanium aluminum The decay resistance of intermetallic compound and crocking resistance are above general titanium alloy.And γ-TiAl intermetallic compound is made For a kind of novel light structural material, because having high specific strength, high specific stiffness, anti-corrosion, wear-resisting, high temperature resistant and excellent antioxygen Change the advantages such as performance, become one of the good candidates structural material in the field such as aerospace industry, civilian industry in the present age.According to Advanced surface engineering technology, is prepared as material surface coating by γ-TiAl intermetallic compound so that it is excellent is anti-corrosion, resistance to Mill performance is transplanted to the material surface of corrosion, wear scratch resistant difference, has the biggest economic benefit and using value.
Chinese patent literature CN104357783A discloses a kind of titanium-aluminium alloy powder body material used for hot spraying and preparation side thereof Method, the atom of this powder body material consists of Ti-45Al-7Nb-4V or Ti-45Al-7Nb-4Cr or Ti-45Al-7Nb-2V- 2Cr, the γ-TiAl phase content in them is respectively 65wt%～95wt%, 80wt%～95wt%, 90wt%～95wt%.This powder body Material is with γ-TiAl-base alloy as matrix, by independent and compound interpolation Nb, Cr, V alloy element, uses vacuum consumable electric arc Titanium-aluminium alloy mother alloy ingot prepared by smelting furnace, and utilizes aerosolization method to realize the γ-TiAl-base alloy powder body material containing metastable β phase Material preparation, this γ-TiAl-base alloy powder body material mainly coordinates and is divided into γ phase, β to be harmonious α2Phase, non-oxidation phase and nitridation in powder body Phase.But, the powder body material of this high γ-TiAl phase content is difficult to deposition formation, thus is difficult to be prepared as coating application In the surfacecti proteon of material, this namely the document the most do not mention this powder body material made coating by thermal spraying again Reason.
Summary of the invention
The powder body material that present invention aims to the high γ-TiAl phase content that prior art exists is difficult to preparation painting The technical problem of layer, it is provided that abrasion-resistant coatings of a kind of high γ-TiAl phase content and preparation method thereof.
The technical scheme realizing above-mentioned purpose of the present invention is: the abrasion-resistant coatings of a kind of high γ-TiAl phase content, this coating Cr and/or V of elementary composition by following atomic percent: the Nb of Al, 5～10at%, 5～the 10at% of 42～45at% and The Ti of surplus；The thing phase composition of this coating is as follows: γ-TiAl phase content is 75～90wt%, α2-Ti3Al phase content be 5～ 15wt%, β-Ti phase content is 5～10wt%, without obvious oxygen/nitrogen impurity phase.
The preparation method of the abrasion-resistant coatings of above-mentioned high γ-TiAl phase content has steps of:
1. add after the Ti rod of intermediate alloy AlNb, AlV, AlCr, Al grain and purity >=99.9% being mixed according to atomic percent Entering in vacuum arc melting furnace melting is block materials, then uses gas-atomized powder equipment that above-mentioned block materials is made powder Body material, obtains, by screening, the spraying powder that particle diameter is 15～40 μm；
2. the spraying powder using low temperature supersonic spray coating technology step 1. to be obtained sprays to matrix surface and prepares high γ-TiAl The abrasion-resistant coatings of phase content.
Above-mentioned steps 2. described in matrix be preferably magnesium alloy substrate, more preferably ZM5 magnesium alloy substrate.
Above-mentioned steps 2. described in low temperature supersonic spray coating technology concrete technology parameter be: spraying temperature be 1100～ 1300 DEG C, reducing gas hydrogen flowing quantity be 15～30L/min, carrier gas argon flow amount be 25～40L/min, powder feed rate be 120 ～200g/min, spray distance be 18～25cm, spray gun translational speed be 500～1500mm/s.
The good effect that the present invention has: the composition of powder body material is optimized by one aspect of the present invention, the most right The particle diameter of powder body material is optimized, it is crucial that employing low temperature supersonic spray coating technology is as plasma spray technology, and this spraying Technology both can be prevented effectively from the change of sprayed on material composition, again it can be avoided that introduce oxidation or the impurity of nitridation, thus protects Card coating performance is essentially identical with the block performance preparing powder body material, is respectively provided with mechanical property and the anti-wear performance of excellence, Achieve eventually and the powder body material of high γ-TiAl phase content is prepared high γ-TiAl phase content, extremely low oxygen/nitrogen impurity phase The abrasion-resistant coatings of content.
Accompanying drawing explanation
Fig. 1 is the SEM figure of the spraying powder of embodiment 3.
Fig. 2 is the cross section microscopic appearance schematic diagram of the coating that embodiment 3 prepares.
Fig. 3 is embodiment 1～X-ray diffraction (XRD) figure of the prepared coating of embodiment 3, and in figure, curve a, b, c are the most right The coating that should prepare in embodiment 1,2,3.
Detailed description of the invention
(embodiment 1)
The abrasion-resistant coatings of the high γ-TiAl phase content of the present embodiment is by the V of Nb, 5at% of Al, 5at% of 45at% and surplus Ti composition (being the most all abbreviated as Ti-45Al-5Nb-5V).
The thing phase composition of this coating is as follows: γ-TiAl phase content is 78.7wt%, α2-Ti3Al phase content be 14.2wt%, β- Ti phase content is 7.1wt%, without obvious oxygen/nitrogen impurity phase.
The preparation method of the abrasion-resistant coatings of the high γ-TiAl phase content of the present embodiment is as follows:
1. add after the Ti rod of intermediate alloy AlNb, AlV, Al grain and purity >=99.9% being mixed according to above-mentioned atomic percent Entering in vacuum arc melting furnace melting is block materials, then uses gas-atomized powder equipment that above-mentioned block materials is made powder Body material, obtains, by screening, the spraying powder that particle diameter is 15～40 μm.
2. the spraying powder using low temperature supersonic spray coating technology step 1. to be obtained sprays to ZM5 magnesium alloy matrix surface Prepare the abrasion-resistant coatings of high γ-TiAl phase content.
Concrete technology parameter is: spraying temperature is 1200 DEG C, reducing gas hydrogen flowing quantity is 15L/min, carrier gas argon stream Amount is 35L/min, powder feed rate is 120g/min, spray distance is 18cm, spray gun translational speed is 800mm/s, coating layer thickness For 0.5mm.
(embodiment 2～embodiment 3)
The coating composition of embodiment 2 and embodiment 3 is shown in Table 1, and its preparation method is substantially the same manner as Example 1, and difference is shown in Table 1。
Wherein, scanning electron microscope (SEM) figure of the spraying powder of embodiment 3 is shown in Fig. 1, the coating that embodiment 3 prepares transversal Fig. 2 is shown in by face microscopic appearance schematic diagram.
Table 1
Embodiment 1 Embodiment 2 Embodiment 3
Coating forms Ti-45Al-5Nb-5V Ti-43Al-8Nb-5Cr Ti-43Al-5Nb-6V-2Cr
Spraying temperature 1200℃ 1150℃ 1250℃
Reducing gas hydrogen flowing quantity 15L/min 25L/min 30L/min
Carrier gas argon flow amount 35L/min 30L/min 40L/min
Powder feed rate 120g/min 160g/min 180g/min
Spray distance 18cm 20cm 24cm
Spray gun translational speed 800mm/s 1000mm/s 1200mm/s
(test case 1)
Using X-ray diffractometer to analyze embodiment 1～coating substance phase composition that embodiment 3 prepares, result is shown in Fig. 3 (curve in figure A, b, c correspond respectively to the coating that embodiment 1,2,3 prepares).
It is calculated the thing phase composition of each coating according to Fig. 3, the results are shown in Table 2.
(test case 2)
Use microhardness instrument testing example 1～the microhardness of the prepared coating of embodiment 3, the results are shown in Table 2.
(test case 3)
Use nano-hardness tester testing example 1～the elastic modelling quantity of the prepared coating of embodiment 3, the results are shown in Table 2.
(test case 4)
Use in CETR friction wear testing machine testing example 1～the prepared coating of embodiment 3 and each coating preparation process The block materials that melting obtains tribological property under DRY SLIDING, uses three-dimensional appearance instrument to test the average of them simultaneously Wear volume, result is all shown in Table 2.
Test condition is as follows: load is respectively 35N, 40N, 45N, 50N, and fraction time is 30min.
Table 2
Embodiment 1 Embodiment 2 Embodiment 3
Coating forms Ti-45Al-5Nb-5V Ti-43Al-8Nb-5Cr Ti-43Al-5Nb-6V-2Cr
γ-TiAl phase content 78.7wt% 86.6wt% 80.2wt%
α2-Ti3Al phase content 14.2wt% 8.1wt% 10.5wt%
β-Ti phase content 7.1wt% 5.3wt% 9.3wt%
Oxygen/nitrogen impurity phase content Inconspicuous Inconspicuous Inconspicuous
Microhardness 494HV 528HV 593HV
Elastic modelling quantity 132GPa 163GPa 170GPa
Coating average friction factor 0.496 0.521 0.534
Block average friction factor 0.479 0.565 0.571
Coating average abrasion volume 2.471×108μm3 2.214×108μm3 2.149×108μm3
Block average abrasion volume 2.353×108μm3 2.086×108μm3 2.021×108μm3
Average abrasion volume ratio (coating/block) 1.050 1.061 1.063
As can be seen from Table 2: the coating of each embodiment differs with average friction factor and the average abrasion volume of block Not quite, especially coating average abrasion volume is less than 1.1 times of block, thus shows the anti-wear performance of excellence.

Claims (4)

1. the abrasion-resistant coatings of one kind high γ-TiAl phase content, it is characterised in that this coating is by the element of following atomic percent Composition: Cr and/or V and the Ti of surplus of the Nb of Al, 5～10at%, 5～the 10at% of 42～45at%；The thing of this coating group mutually Become as follows: γ-TiAl phase content is 75～90wt%, α2-Ti3Al phase content be 5～15wt%, β-Ti phase content be 5～10wt%, Without obvious oxygen/nitrogen impurity phase.
2. the preparation method of the abrasion-resistant coatings of the high γ-TiAl phase content described in claim 1, it is characterised in that have following Step:
1. add after the Ti rod of intermediate alloy AlNb, AlV, AlCr, Al grain and purity >=99.9% being mixed according to atomic percent Entering in vacuum arc melting furnace melting is block materials, then uses gas-atomized powder equipment that above-mentioned block materials is made powder Body material, obtains, by screening, the spraying powder that particle diameter is 15～40 μm；
2. the spraying powder using low temperature supersonic spray coating technology step 1. to be obtained sprays to matrix surface and prepares high γ-TiAl The abrasion-resistant coatings of phase content.
The preparation method of the abrasion-resistant coatings of high γ-TiAl phase content the most according to claim 2, it is characterised in that on: State step 2. described in matrix be ZM5 magnesium alloy substrate.
The preparation method of the abrasion-resistant coatings of high γ-TiAl phase content the most according to claim 2, it is characterised in that on: State step 2. described in low temperature supersonic spray coating technology concrete technology parameter be: spraying temperature is 1100～1300 DEG C, reduction Gaseous hydrogen throughput is 15～30L/min, carrier gas argon flow amount is 25～40L/min, powder feed rate is 120～200g/min, Spray distance is 18～25cm, spray gun translational speed is 500～1500mm/s.
CN201610585806.0A 2016-07-22 2016-07-22 Abrasion resisting coating with high gamma-TiAl phase content and preparing method of abrasion resisting coating Pending CN106048497A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106637017A (en) * 2017-01-17 2017-05-10 哈尔滨工业大学 Method for self-generation of high-strength wear-resistant layer on surface of Ti-22Al-25Nb alloy

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104357783A (en) * 2014-10-20 2015-02-18 中国人民解放军装甲兵工程学院 Titanium-aluminum alloy powder material for thermal spraying and preparation method thereof

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104357783A (en) * 2014-10-20 2015-02-18 中国人民解放军装甲兵工程学院 Titanium-aluminum alloy powder material for thermal spraying and preparation method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
朱胜 等: "超音速微粒沉积Ti-45Al-7Nb-4Cr涂层的摩擦学性能", 《装甲兵工程学院学报》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106637017A (en) * 2017-01-17 2017-05-10 哈尔滨工业大学 Method for self-generation of high-strength wear-resistant layer on surface of Ti-22Al-25Nb alloy

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Application publication date: 20161026