CN102312181A - Isothermal forging method of TiAl alloy - Google Patents
Isothermal forging method of TiAl alloy Download PDFInfo
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- CN102312181A CN102312181A CN201110263598A CN201110263598A CN102312181A CN 102312181 A CN102312181 A CN 102312181A CN 201110263598 A CN201110263598 A CN 201110263598A CN 201110263598 A CN201110263598 A CN 201110263598A CN 102312181 A CN102312181 A CN 102312181A
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Abstract
The invention discloses an isothermal forging method of TiAl alloy. The method comprises steps that: scale and crack defects visible to naked eye on a surface of a melted alloy ingot casting are lathed and a supersonic wave flaw detection is conducted; a holding furnace with a heater is arranged on a press, and a die temperature is controlled at 850-900 DEG C, especially during a forging process; defect-free TiAl alloy is coated with a high temperature oxidation resistant coating on the surface thereof, and dried naturally; the surface treated TiAl alloy is heated in the holding furnace and insulated at 1150-1250 DEG C for 2-2.5 h; the heated TiAl alloy is treated with the isothermal forging along a material height direction, with an initial deflection controlled within 5%, compacted for 2 times, heated in the holding furnace again, and insulated at 1150-1250 DEG C for 0.5-1h; and the above forging process is repeated until the TiAl alloy plate with a preset thickness is obtained. The technology of the invention is simple, at low costs, and capable of preparing a high quality and defect-free TiAl alloy target material.
Description
Technical field
What the present invention relates to is a kind of working method of intermetallic alloy target, specifically is a kind of isothermal forging method that is used for the TiAl alloy of magnetron sputtering plating.
Background technology
Magnetron sputtering plating is a kind of novel physical vapor plated film mode, and than evaporation coating mode earlier, the advantage of its a lot of aspects is quite obvious.As a comparatively proven technique that has developed, magnetron sputtering has been applied to many fields.The magnetron sputtering plating target is divided into metal sputtering plated film target, alloy sputter plated film target, ceramic sputtering coating target; The boride ceramics sputtering target material, carbide ceramics sputtering target material, fluorochemical ceramic sputtering target material; The nitride ceramics sputtering target material, oxide ceramics target etc.The Ti-Al alloy target material is that (Ti, the Al) core material of N film require its composition even to multi-arc ion coating, and clarity is high, fine and close.(Ti, Al) the N film has better tack, hardness HRC than the TiN film>70, good toughness, use temperature is higher approximately 200 ℃ than TiN film, makes cutter life improve 5～6 times, and therefore this film has broad application prospects in cutlery plated film industry.Abroad be widely used at present on the cutleries such as drill bit in the processing industry of car combustion engine, accurate device, milling cutter, lathe tool, its working accuracy is high, prolongs duration of service on the automatic production line, raises the efficiency.Present impurity component to the TiAl target is controlled at C, and < 0.03%, < 0.5%, H < 0.03% for O.The TiAl alloy target material is mainly used in multi-arc ion plating film.Because this alloy rigidity height, fragility is big, and characteristics such as difficult processing make this alloy in the course of processing, be difficult to guarantee good processing quality, and tangible surface imperfection such as crackle appear in material, badly influence the normal use of material.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, a kind of isothermal forging method that is used for the TiAl alloy of cutlery plated film industry is provided.Can prepare flawless with this method, organize tabular TiAl alloy target material of uniform size.
The objective of the invention is to realize through following technical scheme:
The present invention relates to a kind of isothermal forging method of TiAl alloy, may further comprise the steps:
(a), material flaw detection: the TiAl alloy cast ingot car after the melting is gone surface scale and naked eyes visible crack defective, adopt UT to confirm defectives such as material pore-free;
(b), machine mold heated, insulation: on press, be equipped with holding furnace, guarantee 850～900 ℃ of die temperatures, and the die temperature in the assurance forging process is also at 850～900 ℃ with heating unit;
(c), material surface is handled: the flawless TiAl alloy surface of affirmation in the step (a) is coated resistance to high temperature oxidation coating, seasoning;
(d), material heat treatment: the TiAl alloy in the step (c) after the surface treatment advanced stove intensification heating, 1150 ℃～1250 ℃ insulations 2～2.5 hours;
(e), isothermal forging: the TiAl alloy after the thermal treatment in the step (d) is placed into rapidly on the high temperature isothermal forging press; Forge along the material height direction; First deflection is controlled in 5%, melts down heating after suppressing 2 times repeatedly, 1150 ℃～1250 ℃ insulations after 0.5～1 hour; Repeat above-mentioned forging process, until the tabular TiAl alloy that obtains preset thickness.
Preferably, the mass percentage content of Ti is 50～87.5% in the TiAl alloy cast ingot described in the step (a) after the melting, and the mass percentage content of Al is 12.5～50%.
Preferably, press described in the step (b) is 630 tons of press.
Preferably, resistance to high temperature oxidation coating described in the step (c) be with the high-temperature oxidation resistant coating brushing one time, said resistance to high temperature oxidation coat-thickness is 0.1～0.2mm.
Preferably, the preset thickness of tabular TiAl alloy is 40～80mm described in the step (e).
Compared with prior art, the beneficial effect that the present invention has is: can prepare flawless with method of the present invention, organize tabular TiAl alloy target material of uniform size, it is high to have overcome conventional Ti Al alloy target material alloy rigidity, and fragility is big, defectives such as difficult processing.
Description of drawings
Fig. 1 is the synoptic diagram of TiAl sheet alloy of the isothermal forging of embodiment 3;
Fig. 2 is the microtexture photo of TiAl sheet alloy of the isothermal forging of embodiment 3.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated, present embodiment provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment being to implement under the prerequisite with technical scheme of the present invention.
Embodiment 1
Adopt the isothermal forging technology to forge the TiAl alloy, concrete steps are following:
(a), material flaw detection: (wherein with the TiAl after the melting; The mass percentage content of Ti is 87.5%; The mass percentage content of Al is 12.5%) the alloy cast ingot car goes surface scale and naked eyes visible crack defective, adopts UT to confirm defectives such as material pore-free;
(b), machine mold heated, insulation: on 630 tons of press, be equipped with holding furnace, guarantee that die temperature is 850 ℃, and guarantee that the temperature in the forging process is 850 ℃ with heating unit;
(c), material surface is handled: flawless TiAl alloy surface is coated the resistance to high temperature oxidation coating.Thickness 0.1mm only needs brushing one time, and drying can be advanced the stove heating slightly;
(d), material heat treatment: the TiAl alloy that will scribble the diameter 100mm of resistance to high temperature oxidation coating heated up with stove and heats, 1150 ℃ of insulations 2 hours;
(e), isothermal forging: the TiAl alloy after the thermal treatment is placed into rapidly on the high temperature isothermal forging press, forges along the material height direction, first deflection is controlled in 5%, melts down heating after suppressing 2 times repeatedly.After 0.5 hour, repeat above-mentioned forging process until obtaining zero defect 1150 ℃ of insulations, thickness is the tabular TiAl alloy of 40mm.
Embodiment 2
Adopt the isothermal forging technology to forge the TiAl alloy, concrete steps are following:
(a), material flaw detection: (wherein with the TiAl after the melting; The mass percentage content of Ti is 75%; The mass percentage content of Al is 25%) the alloy cast ingot car goes surface scale and naked eyes visible crack defective, adopts UT to confirm defectives such as material pore-free;
(b), machine mold heated, insulation: on 630 tons of press, be equipped with holding furnace, guarantee that die temperature is 900 ℃, and guarantee that the temperature in the forging process is 900 ℃ with heating unit;
(c), material surface is handled: flawless TiAl alloy surface is coated the resistance to high temperature oxidation coating.Thickness 0.2mm only needs brushing one time, and drying can be advanced the stove heating slightly;
(d), material heat treatment: the TiAl alloy that will scribble the diameter 100mm of resistance to high temperature oxidation coating heated up with stove and heats, 1150 ℃ of insulations 2.5 hours;
(e), isothermal forging: the TiAl alloy after the thermal treatment is placed into rapidly on the high temperature isothermal forging press, forges along the material height direction, first deflection is controlled in 5%, melts down heating after suppressing 2 times repeatedly.After 1 hour, repeat above-mentioned forging process until obtaining zero defect 1150 ℃ of insulations, thickness is the tabular TiAl alloy of 50mm.
Embodiment 3
Adopt the isothermal forging technology to forge the TiAl alloy, concrete steps are following:
(a), material flaw detection: (wherein with the TiAl after the melting; The mass percentage content of Ti is 64%; The mass percentage content of Al is 36%) the alloy cast ingot car goes surface scale and naked eyes visible crack defective, adopts UT to confirm defectives such as material pore-free;
(b), machine mold heated, insulation: on 630 tons of press, be equipped with holding furnace, guarantee that die temperature is 880 ℃, and guarantee that the temperature in the forging process is 880 ℃ with heating unit;
(c), material surface is handled: flawless TiAl alloy surface is coated the resistance to high temperature oxidation coating.Thickness 0.15mm only needs brushing one time, and drying can be advanced the stove heating slightly;
(d), material heat treatment: the TiAl alloy that will scribble the diameter 100mm of resistance to high temperature oxidation coating heated up with stove and heats, 1200 ℃ of insulations 2.2 hours;
(e), isothermal forging: the TiAl alloy after the thermal treatment is placed into rapidly on the high temperature isothermal forging press, forges along the material height direction, first deflection is controlled in 5%, melts down heating after suppressing 2 times repeatedly.After 0.8 hour, repeat above-mentioned forging process until obtaining zero defect 1200 ℃ of insulations, thickness is the tabular TiAl alloy of 80mm.
Embodiment 4
Adopt the isothermal forging technology to forge the TiAl alloy, concrete steps are following:
(a), material flaw detection: (wherein with the TiAl after the melting; The mass percentage content of Ti is 50%; The mass percentage content of Al is 50%) the alloy cast ingot car goes surface scale and naked eyes visible crack defective, adopts UT to confirm defectives such as material pore-free;
(b), machine mold heated, insulation: on 630 tons of press, be equipped with holding furnace, guarantee that die temperature is 900 ℃, and guarantee that the temperature in the forging process is 900 ℃ with heating unit;
(c), material surface is handled: flawless TiAl alloy surface is coated the resistance to high temperature oxidation coating.Thickness 0.1mm only needs brushing one time, and drying can be advanced the stove heating slightly;
(d), material heat treatment: the TiAl alloy that will scribble the diameter 100mm of resistance to high temperature oxidation coating heated up with stove and heats, 1250 ℃ of insulations 2 hours;
(e), isothermal forging: the TiAl alloy after the thermal treatment is placed into rapidly on the high temperature isothermal forging press, forges along the material height direction, first deflection is controlled in 5%, melts down heating after suppressing 2 times repeatedly.After 0.5 hour, repeat above-mentioned forging process until obtaining zero defect 1250 ℃ of insulations, thickness is the tabular TiAl alloy of 65mm.
Can prepare flawless with method of the present invention, organize tabular TiAl alloy target material of uniform size, it is high to have overcome conventional Ti Al alloy target material alloy rigidity, and fragility is big, defectives such as difficult processing.The TiAl alloy surface that the foregoing description 1～4 makes is not all seen defectives such as crackle, and the thickness of the isothermal forging for embodiment 3 shown in Figure 1 is the TiAl sheet alloy of 80mm, and visible surface is not seen defectives such as crackle; Shown in Figure 2 is the microtexture photo of TiAl sheet alloy of the isothermal forging of embodiment 3, can see equally distributed sheet tissue.
Claims (5)
1. the isothermal forging method of a TiAl alloy is characterized in that, may further comprise the steps:
(a), material flaw detection: the TiAl alloy cast ingot car after the melting is gone surface scale and naked eyes visible crack defective, adopt UT to confirm defectives such as material pore-free;
(b), machine mold heated, insulation: on press, be equipped with holding furnace, guarantee die temperature, and the die temperature in the assurance forging process is also at 850～900 ℃ at 850～900 ℃ with heating unit;
(c), material surface is handled: the flawless TiAl alloy surface of affirmation in the step (a) is coated resistance to high temperature oxidation coating, seasoning;
(d), material heat treatment: the TiAl alloy in the step (c) after the surface treatment advanced stove intensification heating, 1150 ℃～1250 ℃ insulations 2～2.5 hours;
(e), isothermal forging: the TiAl alloy after the thermal treatment in the step (d) is placed into rapidly on the high temperature isothermal forging press; Forge along the material height direction; First deflection is controlled in 5%, melts down heating after suppressing 2 times repeatedly, 1150 ℃～1250 ℃ insulations after 0.5～1 hour; Repeat above-mentioned forging process, until the tabular TiAl alloy that obtains preset thickness.
2. the isothermal forging method of TiAl alloy according to claim 1 is characterized in that, the mass percentage content of Ti is 50～87.5% in the TiAl alloy cast ingot described in the step (a) after the melting, and the mass percentage content of Al is 12.5～50%.
3. the isothermal forging method of TiAl alloy according to claim 1 is characterized in that, press described in the step (b) is 630 tons of press.
4. the isothermal forging method of TiAl alloy according to claim 1 is characterized in that, resistance to high temperature oxidation coating described in the step (c) be with the high-temperature oxidation resistant coating brushing one time, said resistance to high temperature oxidation coat-thickness is 0.1～0.2mm.
5. the isothermal forging method of TiAl alloy according to claim 1 is characterized in that, the preset thickness of tabular TiAl alloy is 40～80mm described in the step (e).
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103305781A (en) * | 2013-07-09 | 2013-09-18 | 上海交通大学 | Multi-element microalloyed titanium alloy processing method |
| CN104588997A (en) * | 2015-01-20 | 2015-05-06 | 哈尔滨工业大学 | Method for preparing TiAl alloy component by near-isothermal die forging |
| CN105088329A (en) * | 2015-02-02 | 2015-11-25 | 西北工业大学 | Preparation method of TiAl alloy quasi seed crystals |
| CN105483585A (en) * | 2015-12-07 | 2016-04-13 | 南京理工大学 | Preparation method for titanium-aluminum alloy with excellent room-temperature ductility |
| CN108580770A (en) * | 2018-03-29 | 2018-09-28 | 西北工业大学 | The super modeling creep age forming method of TiAl-base alloy blade blank |
| CN111500957A (en) * | 2020-04-17 | 2020-08-07 | 上海交通大学 | Preparation method of 700 ℃ high-temperature-resistant titanium-based composite material plate |
| CN112122523A (en) * | 2020-09-16 | 2020-12-25 | 中国航发沈阳黎明航空发动机有限责任公司 | TiAl-based alloy stator blade isothermal forming manufacturing method and device thereof |
| CN116219338A (en) * | 2022-12-27 | 2023-06-06 | 西北工业大学重庆科创中心 | Fine bi-state or full lamellar structure regulation and control method for niobium-containing TiAl alloy |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101559471A (en) * | 2009-05-22 | 2009-10-21 | 哈尔滨工业大学 | Aluminum alloy complex disc part isothermal precision forging process method |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101559471A (en) * | 2009-05-22 | 2009-10-21 | 哈尔滨工业大学 | Aluminum alloy complex disc part isothermal precision forging process method |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103305781A (en) * | 2013-07-09 | 2013-09-18 | 上海交通大学 | Multi-element microalloyed titanium alloy processing method |
| CN104588997A (en) * | 2015-01-20 | 2015-05-06 | 哈尔滨工业大学 | Method for preparing TiAl alloy component by near-isothermal die forging |
| CN105088329A (en) * | 2015-02-02 | 2015-11-25 | 西北工业大学 | Preparation method of TiAl alloy quasi seed crystals |
| CN105088329B (en) * | 2015-02-02 | 2017-11-14 | 西北工业大学 | A kind of preparation method of the quasi- seed crystal of TiAl alloy |
| CN105483585A (en) * | 2015-12-07 | 2016-04-13 | 南京理工大学 | Preparation method for titanium-aluminum alloy with excellent room-temperature ductility |
| CN108580770A (en) * | 2018-03-29 | 2018-09-28 | 西北工业大学 | The super modeling creep age forming method of TiAl-base alloy blade blank |
| CN111500957A (en) * | 2020-04-17 | 2020-08-07 | 上海交通大学 | Preparation method of 700 ℃ high-temperature-resistant titanium-based composite material plate |
| CN111500957B (en) * | 2020-04-17 | 2021-10-15 | 上海交通大学 | Preparation method of 700 ℃ high-temperature-resistant titanium-based composite material plate |
| CN112122523A (en) * | 2020-09-16 | 2020-12-25 | 中国航发沈阳黎明航空发动机有限责任公司 | TiAl-based alloy stator blade isothermal forming manufacturing method and device thereof |
| CN116219338A (en) * | 2022-12-27 | 2023-06-06 | 西北工业大学重庆科创中心 | Fine bi-state or full lamellar structure regulation and control method for niobium-containing TiAl alloy |
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