CN102729575B - Preparation method of TiAl-based laminar composite material plate - Google Patents
Preparation method of TiAl-based laminar composite material plate Download PDFInfo
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Abstract
The invention discloses a preparation method of a TiAl-based laminar composite material plate, which is used for solving the problems of poor tissue compactness and poor tissue uniformity existing in the conventional TiAl-based material. The method comprises the following steps of: performing ball milling and powder mixing on reinforced bodied and Ti powder, and performing hot pressed sintering, linear cutting and surface pretreatment to obtain a TiB/Ti composite plate on which reinforced bodies are distributed continuously; performing surface treatment on the TiB/Ti composite plate and a pure Al plate, and performing laminating and hot pressing alternatively; and performing thermal treatment to perform a diffusion reaction on the Ti plate and the Al plate to obtain a TiAl-based laminar composite material plate. The TiAl-based laminar composite material plate disclosed by the invention can be used for preparing parts of aviation or space flight engines or wings or shell of ultrahigh-speed flying vehicles and preformed materials formed in a super plasticizing way.
Description
Technical field
The present invention relates to the preparation method of TiAl composite panel.
Background technology
TiAl base alloy is a kind of novel light heat resistant structure material, proportion is less than 50% of nickel-base alloy, there is lightweight, the advantage such as high-strength, anti-corrosion, wear-resisting, high temperature resistant, and there is excellent normal temperature and high-temperature behavior, become the emphasis material of the interior Aeronautics and Astronautics of worldwide and military field research and application.Through the effort of decades, TiAl base alloy has entered practical developing stage at present.Wherein, the most urgent to the demand of TiAl based alloy plate.
The preparation of TiAl based alloy plate is one of of paramount importance problem in TiAl base alloy practical research.Yet because TiAl base alloy has essential fragility, the difficulty of preparation TiAl based alloy plate is very large.In addition, the room temperature strength that TiAl base alloy is lower, plasticity and toughness, also limited its practical application.
Utilize pure titanium plate and the pure aluminum plate multilayer that grew up in recent years replace the method that rolling and heat treatment technics are prepared TiAl base alloy material plate, for new approach has been opened up in preparation and the application of TiAl base alloy.But there is following problem in the TiAl base alloy multi-layer sheet that adopts multilayer rolling and heat treatment technics to prepare at present: 1, because pure titanium and pure aluminum plate plastic deformation resistance differ greatly, titanium plate and aluminium sheet deformation in the multilayer composite sheet operation of rolling, make the structural homogenity of the TiAl based alloy plate that obtains poor.2, adopting titanium plate and aluminium sheet is raw material, and the TiAl based alloy plate dense structure property of preparation is poor, has serious interior oxidative phenomena.
Summary of the invention
The present invention is that will to solve dense structure's property of existing TiAl sill poor, the problem that structural homogenity is poor, and the preparation method of a kind of TiAl base layer-shaped composite material plate providing.
The preparation method of a kind of TiAl base layer-shaped composite material plate the present invention relates to carries out according to the following steps:
One, by reinforcement and Ti powder, at ball material mass ratio, be 5: 1, under the condition that rotating speed is 180～200rmp, ball milling 7～10h, obtains mixed-powder, and wherein reinforcement is TiB
2, reinforcement accounts for 3%～5% of mixed-powder quality;
Two, mixed-powder step 1 being obtained joins in mould, then mould is placed in hot pressing furnace, in temperature, is 1200～1300 ℃, and hot pressing 1～1.5h under the condition that pressure is 25～30MPa, obtains hot pressing ingot; Hot pressing ingot line is cut into sheet material, then after surface preparation, obtain TiB/Ti composite plate;
Three, by Al plate after surface preparation, the TiB/Ti composite plate alternative stacked obtaining with step 2 is placed in hot pressing furnace, in temperature, it is first 515～520 ℃, pressure is precompressed 1.5～2h under the condition of 25～35MPa, again by Pressure Drop to 0MPa, be warming up to 660 ℃～670 ℃ and keep 2～3h, then be warming up to 800 ℃ and keep 2～3h, be warming up to again 1200 ℃ and keep 3～6h, finally be cooled to 1000～1100 ℃, apply pressure to 25～35MPa simultaneously, keep 30～50min, obtain TiAl base layer-shaped composite material plate.
Pretreated concrete steps are: first in 10vol.%HF solution, clean and be thinned to design thickness, then by surface finish, remove tool marks and the layer that is corroded.600 orders or 800 object sand paperings for Al plate, then use 10wt.%NaOH alkali cleaning
The TiAl base layer-shaped composite material plate that the present invention obtains with adding the composite toughening method of non-continuous ceramics and micro-lay-up method to carry out three step heat treatments in vacuum hotpressing stove, can by adjusting Ti matrix composite sheet and the number of Al plate alternative stacked or the thickness of material itself, obtain easily the TiAl base forming laminated sheet material of different-thickness ratio, many due to the Thickness Ratio Al thickness of slab of Ti plate, in the sheet material that can make finally to obtain, leave one deck TiB/Ti based composites layer, to increase TiAl based composites intensity at room temperature, plasticity and toughness, preparation process of the present invention does not adopt rolling, improved TiAl base layer-shaped composite material plate structural homogenity, and technique is simple, the cycle is short, and material is pollution-free, and the TiAl base layer-shaped composite material plate dense structure property that the TiAl base layer-shaped composite material plate that the inventive method is prepared and existing method are prepared has improved 10%～20%, has effectively suppressed interior oxidative phenomena.The TiAl base layer-shaped composite material plate of preparing does not need further processing directly to use, and Al reacts and prepares at short notice TiAl sheet alloy under liquid state, than the existing method of preparing TiAl based alloy plate more economically, is beneficial to industrialization.
Accompanying drawing explanation
Fig. 1 is the scanning electron microscope (SEM) photograph of the prepared TiB/Ti based composites of step 1 in embodiment 1;
Fig. 2 is the scanning electron microscope (SEM) photograph in the TiAl matrix composite sheet cross section with layer structure that makes of embodiment 1.
The specific embodiment
The specific embodiment one: the preparation method of a kind of TiAl base layer-shaped composite material plate of present embodiment carries out according to the following steps:
One, by reinforcement and Ti powder, at ball material mass ratio, be 5: 1, under the condition that rotating speed is 180～200rmp, ball milling 7～10h, obtains mixed-powder, and wherein reinforcement is TiB
2, reinforcement accounts for 3%～5% of mixed-powder quality;
Two, mixed-powder step 1 being obtained joins in mould, then mould is placed in hot pressing furnace, in temperature, is 1200～1300 ℃, and hot pressing 1～1.5h under the condition that pressure is 25～30MPa, obtains hot pressing ingot; Hot pressing ingot line is cut into sheet material, then after surface preparation, obtain TiB/Ti composite plate;
Three, by Al plate after surface preparation, the TiB/Ti composite plate alternative stacked obtaining with step 2 is placed in hot pressing furnace, in temperature, it is first 515～520 ℃, pressure is precompressed 1.5～2h under the condition of 25～35MPa, again by Pressure Drop to 0MPa, be warming up to 660 ℃～670 ℃ and keep 2～3h, then be warming up to 800 ℃ and keep 2～3h, be warming up to again 1200 ℃ and keep 3～6h, finally be cooled to 1000～1100 ℃, apply pressure to 25～35MPa simultaneously, keep 30～50min, obtain TiAl base layer-shaped composite material plate.
The TiAl base layer-shaped composite material plate that present embodiment obtains with adding the composite toughening method of non-continuous ceramics and micro-lay-up method to carry out three step heat treatments in vacuum hotpressing stove, can by adjusting Ti matrix composite sheet and the number of Al plate alternative stacked or the thickness of material itself, obtain easily the TiAl base forming laminated sheet material of different-thickness ratio, many due to the Thickness Ratio Al thickness of slab of Ti plate, in the sheet material that can make finally to obtain, leave one deck TiB/Ti based composites layer, to increase TiAl based composites intensity at room temperature, plasticity and toughness, present embodiment preparation process does not adopt rolling, improved TiAl base layer-shaped composite material plate structural homogenity, and technique is simple, cycle is short, material is pollution-free, TiAl base layer-shaped composite material plate dense structure property has improved 10%～20%, the TiAl base layer-shaped composite material plate of preparing does not need further processing directly to use, Al reacts and prepares at short notice TiAl sheet alloy under liquid state, than the existing method of preparing TiAl based alloy plate more economically, is beneficial to industrialization.
The specific embodiment two: present embodiment is different from the specific embodiment one: the surface preparation described in step 2 is: clean and be thinned to design thickness in 10vol.%HF solution, then by surface finish, remove tool marks and the layer that is corroded, other is identical with the specific embodiment one.
The specific embodiment three: present embodiment is different from the specific embodiment one or two: the surface preparation of the Al plate described in step 3 is: 600 orders or 800 object sand paperings for Al plate, then use 10wt.%NaOH alkali cleaning, other is identical with the specific embodiment one or two.
The specific embodiment four: present embodiment is different from one of specific embodiment one to three: in rapid three, the thickness of Al plate is 0.1mm, other is identical with the specific embodiment one to three.
The specific embodiment five: present embodiment is different from one of specific embodiment one to four is that the thickness of TiB/Ti composite plate in step 3 is 0.3～0.6mm, and other is identical with one of specific embodiment one to four.
The specific embodiment six: present embodiment is different from one of specific embodiment one to five: when Al plate and TiB/Ti composite plate alternative stacked are placed in step 3, be topmost and bottom TiB/Ti composite plate, other is identical with one of specific embodiment one to five.
The specific embodiment seven: present embodiment is different from one of specific embodiment one to six: when Al plate and TiB/Ti composite plate alternative stacked are placed in step 3, the number of plies of Al plate is 5 layers, the TiB/Ti composite plate number of plies is 6 layers, and other is identical with one of specific embodiment one to six.
By following verification experimental verification beneficial effect of the present invention:
Embodiment 1: the preparation method of a kind of TiAl base layer-shaped composite material plate of the present embodiment carries out according to the following steps: by reinforcement and Ti powder, at ball material mass ratio, be one, 5: 1, rotating speed is ball milling 8h under the condition of 200rmp, obtain mixed-powder, wherein reinforcement is TiB2, and reinforcement accounts for 3% of mixed-powder quality; Two, mixed-powder step 1 being obtained joins in mould, then mould is placed in hot pressing furnace, in temperature, is hot pressing 1h under 1200 ℃, the pressure condition that is 25MPa, obtain hot pressing ingot, hot pressing ingot line is cut into sheet material, then after surface preparation, obtain TiB/Ti composite plate; Three, by Al plate after surface preparation, the TiB/Ti composite plate alternative stacked obtaining with step 2 is placed in hot pressing furnace, in temperature, is first 515 ℃, precompressed 1.5h under the condition that pressure is 30MPa; Again by Pressure Drop to 0MPa, be warming up to 670 ℃ and keep 2h, be then warming up to 800 ℃ and keep 3h, then be warming up to 1200 ℃ and keep 6h, be finally cooled to 1100 ℃, apply pressure to 35MPa simultaneously, keep 30min, obtain TiAl base layer-shaped composite material plate.
Shown in ESEM Fig. 1 of the TiB/Ti composite that this test makes through step 1, TiB whisker is evenly distributed in around large-sized Ti particle as can be seen from Figure 1, forms the network structure of quasi-continuous distribution, has strengthened the intensity of material.
The scanning electron microscope (SEM) photograph of the cross section of the TiAl base layer-shaped composite material plate that this test makes as shown in Figure 2, as can be seen from Figure 2: buffy coat (TiB/Ti layer) is evenly distributed on Ti laminate material, has not only solved TiB enrichment and has made the even problem of tissue odds; Also avoided, because the gathering of TiB whisker forms loose brittle layer, also having improved to a certain extent the compactness of material simultaneously.
Claims (7)
1. a preparation method for TiAl base layer-shaped composite material plate, is characterized in that the preparation method of TiAl base layer-shaped composite material plate carries out according to the following steps:
One, by reinforcement and Ti powder, at ball material mass ratio, be 5: 1, under the condition that rotating speed is 180～200rmp, ball milling 7～10h, obtains mixed-powder, and wherein reinforcement is TiB
2, reinforcement accounts for 3%～5% of mixed-powder quality;
Two, mixed-powder step 1 being obtained joins in mould, again mould is placed in hot pressing furnace, in temperature, it is 1200～1300 ℃, pressure is hot pressing 1～1.5h under the condition of 25～30MPa, obtain hot pressing ingot, hot pressing ingot line is cut into sheet material, then after surface preparation, obtain TiB/Ti composite plate;
Three, by Al plate after surface preparation, the TiB/Ti composite plate alternative stacked obtaining with step 2 is placed in hot pressing furnace, in temperature, it is first 515～520 ℃, pressure is precompressed 1.5～2h under the condition of 25～35MPa, again by Pressure Drop to 0MPa, be warming up to 660 ℃～670 ℃ and keep 2～3h, then be warming up to 800 ℃ and keep 2～3h, be warming up to again 1200 ℃ and keep 3～6h, finally be cooled to 1000～1100 ℃, apply pressure to 25～35MPa simultaneously, keep 30～50min, obtain TiAl base layer-shaped composite material plate.
2. the preparation method of TiAl base layer-shaped composite material plate as claimed in claim 1, it is characterized in that the surface preparation described in step 2 is: in 10vol.%HF solution, clean and be thinned to design thickness, then by surface finish, remove tool marks and the layer that is corroded.
3. the preparation method of TiAl base layer-shaped composite material plate as claimed in claim 1 or 2, is characterized in that the surface preparation of the Al plate described in step 3 is: 600 orders or 800 object sand paperings for Al plate, then use 10wt.%NaOH alkali cleaning.
4. the preparation method of TiAl base layer-shaped composite material plate as claimed in claim 1, the thickness that it is characterized in that Al plate in step 3 is 0.1mm.
5. the preparation method of TiAl base layer-shaped composite material plate as claimed in claim 1, the thickness that it is characterized in that TiB/Ti composite plate in step 3 is 0.3～0.6mm.
6. the preparation method of TiAl base layer-shaped composite material plate as claimed in claim 1, while it is characterized in that in step 3, Al plate and TiB/Ti composite plate alternative stacked are placed, is topmost and bottom TiB/Ti composite plate.
7. the preparation method of TiAl base layer-shaped composite material plate as claimed in claim 1, while it is characterized in that in step 3, Al plate and TiB/Ti composite plate alternative stacked are placed, the number of plies of Al plate is 5 layers, the TiB/Ti composite plate number of plies is 6 layers.
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| CN103305725B (en) * | 2013-05-09 | 2015-06-03 | 哈尔滨工业大学 | Al base composite material and method for rapidly preparing TiAl base composite material plate by utilizing same |
| CN103302924A (en) * | 2013-07-03 | 2013-09-18 | 哈尔滨工业大学 | Method for preparing TiBW-Ti3Al composite material plate with laminated structure |
| CN108080804B (en) * | 2016-11-18 | 2020-02-11 | 中国航空制造技术研究院 | Ti-Al 3Preparation method of Ti laminated composite material hollow sandwich structure |
| CN110170527B (en) * | 2019-06-06 | 2020-08-18 | 哈尔滨理工大学 | Preparation method of high-niobium porous layered titanium-aluminum alloy plate |
| CN110711774B (en) * | 2019-10-23 | 2020-11-03 | 太原理工大学 | Pulse current assisted titanium-TiAl composite plate non-sheath rolling method |
| CN113071163B (en) * | 2021-04-23 | 2022-10-18 | 北京机电工程研究所 | Bionic aircraft control surface preparation method |
| CN114603143B (en) * | 2022-02-21 | 2023-09-12 | 中山大学 | Titanium steel composite board preparation method based on titanium-aluminum mixed intermediate layer |
| CN114603144B (en) * | 2022-02-22 | 2023-12-29 | 哈尔滨工业大学 | Porous TiAl sandwich structure composite material and preparation method thereof |
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