CN103639335A - Forging method of titanium-aluminum alloy plate blank - Google Patents
Forging method of titanium-aluminum alloy plate blank Download PDFInfo
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- CN103639335A CN103639335A CN201310628726.5A CN201310628726A CN103639335A CN 103639335 A CN103639335 A CN 103639335A CN 201310628726 A CN201310628726 A CN 201310628726A CN 103639335 A CN103639335 A CN 103639335A
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Abstract
A forging method of a titanium-aluminum alloy plate blank includes the steps: 1) treating a cast ingot, detecting flaws of the cast ingot by crop ultrasonic waves, avoiding cracks, shrink holes and other impurities inside the cast ingot, dyeing the surface of the cast ingot, inspecting whether defects such as cracks exist or not, and removing the defects by coping; 2) coating refractory coatings on the surface of the qualified cast ingot; 3) heating the cast ingot by an electric furnace, cleaning other metal scales on a hearth before heating, preheating the inside of the furnace to reach more than 400 DEG C, keeping the temperature for 1-3 hours, charging the furnace and controlling the fired heating temperature above 1150 DEG C; 4) forging the cast ingot by totally heating for ten times.
Description
Technical field:
The present invention relates to a kind of forging method of titanium-aluminium alloy slab
Background technology
TiAl intermetallic compound is a kind of high-temperature structural material of novel light, volume mass is not as good as 50% of nickel-base alloy, there is lightweight, high than strong, anti-corrosion, anti-corrosion, the high temperature resistant and excellent advantages such as non-oxidizability, and there is excellent normal temperature and mechanical behavior under high temperature, serviceability temperature can reach 700～1000 ℃, becomes the most wide a kind of lightweight high-temperature structural material of contemporary application prospect.Also become weaponry of new generation and high-tech product high-performance, low cost, long-life and light-weighted important substance basis, provide new technology to instruct the key technology in aircraft of new generation, satellite, space momentum blocker, High Mach number guided missile and main battle tank and advanced vehicle heat-resistant part development process.
It is reported, calendar year 2001, Boeing Co. announced, after 787 seating planes are used the engine GENX of GE company low-pressure turbine, two grade blades adopt TiAl alloy, alleviate 800 pounds of engine qualities (364 kilograms), 1998 and Mitsubishi heavy industry in 2003 adopt vacuum melting antigravity low pressure casting method to prepare high Nb-TiAl alloy, and be applied in racing engine charging turbine, to substitute heavier nickel-base alloy Inconel713C turbine, use TiAl alloy to save start-up time, improve maximum (top) speed, demonstrated great potentiality.
The application of TiAl alloy is constantly expanded, at civil aviation space industry, except blade, non-rotatable member, non-stress wheel disc, thin plate covering etc. all may be applied, the charging turbine of automobile and air bleeding valve etc. also become development priority, and porous TiAl material etc.
The fusing point of component and the difference of density due to compound between TiAl base alloy, inevitably can there is metallurgical imperfection, component segregation in ingot casting, can make subsequent thermal machining uncontrollable, and can not get uniform formation, have a strong impact on its comprehensive mechanical property and high-temperature oxidation resistance.Therefore the deformation processing of titanium-aluminium alloy is an industry emphasis difficult problem both domestic and external always.
Summary of the invention
The object of the invention is to provide a kind of forging method of titanium-aluminium alloy blank.
Technical solution of the present invention is, a forging method for titanium-aluminium alloy slab, 1) ingot casting processing, ingot casting checks through crop ultrasonic examination, guarantee that inside ingot flawless, shrinkage cavity and other impurity exist, whether surface colour inspection exists defects i.e.cracks reconditioning to remove; 2) qualified ingot casting face coat fireproof coating, high temperature resistant 1400 ℃, guarantee that effectively protection ingot casting surface is not contaminated under heating for multiple times condition, coating evenly spreads upon ingot casting surface, enters stove heating after 4-5 hour dries; 3) ingot casting adds thermal recovery heating by electric cooker mode, other burning skins of clearing furnace before heating; In stove, be preheated to 400 ℃ of above insulation chargings after 1-3 hour, a fiery heating and temperature control is more than 1150 ℃, and distortion blank temperature is controlled at more than 1100 ℃, final forging temperature ≮ 1050 ℃; 4) ingot casting forges, and forges and heats altogether ten fire, and every time all carries out face coat protection, and change row amount ≯ 15% that every fire is inferior, more than being strict controlled in final forging temperature; Forge to adopt the thick mode of pier to carry out, in process, as long as there is tiny cracking situation, stop immediately forging, after air cooling reconditioning clean, continue processing.
Beneficial effect of the present invention is, this alloy hot-working drag is large, and forging temperature interval range is very little, easily produces a large amount of crackles, cannot be shaped.This method, by face coat, prevents surface oxidation, within the scope of suitable deformation temperature, carries out repeatedly small deformation amount and forges, and with the sotck thinkness size that obtains requiring, from
success is forged extremely
to meet the billet size requirement of follow-up plate rolling.
The specific embodiment
Craft embodiment: titanium-aluminium alloy blank forging example
1. ingot casting is prepared:
1) ingot casting composition
| Fe | C | N | H | O | AL | V |
| 0.15 | 0.01 | 0.025 | 0.012 | 0.15 | 29.45 | 11.83 |
2) ingot casting size
2, ingot casting is processed
1), ingot casting checks through crop ultrasonic examination, guarantee that inside ingot flawless, shrinkage cavity and other impurity exist, whether surface colour inspection exists defects i.e.cracks reconditioning to remove.
2) qualified ingot casting face coat fireproof coating, can be high temperature resistant 1400 ℃, guarantees that effectively protection ingot casting surface is not contaminated under heating for multiple times condition, and coating evenly spreads upon ingot casting surface, enters stove heating after 4-5 hour dries.
3, ingot casting mode of heating
1) adopt heating by electric cooker mode, other burning skins of clearing furnace before heating.
2) in stove, be preheated to 400 ℃ of above insulation chargings after 1-3 hour, a fiery heating and temperature control is more than 1150 ℃, and distortion blank temperature is controlled at more than 1100 ℃, final forging temperature ≮ 1050 ℃.
4, ingot casting forges
1) forge and heat altogether ten fire, every time all carries out face coat protection, and change row amount ≯ 15% that every fire is inferior, more than being strict controlled in final forging temperature.
2) forge to adopt the thick mode of pier to carry out, in process, as long as there is tiny cracking situation, stop immediately forging, after air cooling reconditioning clean, continue processing.
5, finished product inspection
1) by the success of this alloy of flat-die forging from
forge extremely
surface quality is better, substantially without larger crack defect, exists.
2) in the situation that guaranteeing certain final forging temperature and rationally fire becomes row amount, this alloy can forge processing smoothly.
Although the present invention discloses as above with preferred embodiment, so it is not in order to limit the present invention.Persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations.Therefore, protection scope of the present invention is when being as the criterion depending on claims person of defining.
Claims (1)
1. the forging method of a titanium-aluminium alloy slab, it is characterized in that step is as follows: 1) ingot casting is processed, ingot casting checks through crop ultrasonic examination, guarantees that inside ingot flawless, shrinkage cavity and other impurity exist, and whether surface colour inspection exists defects i.e.cracks reconditioning to remove; 2) qualified ingot casting face coat fireproof coating, high temperature resistant 1400 ℃, guarantee that effectively protection ingot casting surface is not contaminated under heating for multiple times condition, coating evenly spreads upon ingot casting surface, enters stove heating after 4-5 hour dries; 3) ingot casting adds thermal recovery heating by electric cooker mode, other burning skins of clearing furnace before heating; In stove, be preheated to 400 ℃ of above insulation chargings after 1-3 hour, a fiery heating and temperature control is more than 1150 ℃, and distortion blank temperature is controlled at more than 1100 ℃, final forging temperature ≮ 1050 ℃; 4) ingot casting forges, and forges and heats altogether ten fire, and every time all carries out face coat protection, and change row amount ≯ 15% that every fire is inferior, more than being strict controlled in final forging temperature; Forge to adopt the thick mode of pier to carry out, in process, as long as there is tiny cracking situation, stop immediately forging, after air cooling reconditioning clean, continue processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310628726.5A CN103639335A (en) | 2013-11-29 | 2013-11-29 | Forging method of titanium-aluminum alloy plate blank |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310628726.5A CN103639335A (en) | 2013-11-29 | 2013-11-29 | Forging method of titanium-aluminum alloy plate blank |
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| CN103639335A true CN103639335A (en) | 2014-03-19 |
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| CN201310628726.5A Pending CN103639335A (en) | 2013-11-29 | 2013-11-29 | Forging method of titanium-aluminum alloy plate blank |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104999007A (en) * | 2015-08-14 | 2015-10-28 | 四川六合锻造股份有限公司 | Method for improving forging plasticity of low expansion alloy |
| 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 |
| CN111496158A (en) * | 2020-05-15 | 2020-08-07 | 宝鸡富士特钛业（集团）有限公司 | Preparation method of TC4 titanium forging stock |
-
2013
- 2013-11-29 CN CN201310628726.5A patent/CN103639335A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104999007A (en) * | 2015-08-14 | 2015-10-28 | 四川六合锻造股份有限公司 | Method for improving forging plasticity of low expansion alloy |
| 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 |
| CN111496158A (en) * | 2020-05-15 | 2020-08-07 | 宝鸡富士特钛业（集团）有限公司 | Preparation method of TC4 titanium forging stock |
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Application publication date: 20140319 |