CN1048994A - Large-size steam turbine titanium alloy linear leaf forging and device - Google Patents
Large-size steam turbine titanium alloy linear leaf forging and device Download PDFInfo
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- CN1048994A CN1048994A CN 89107858 CN89107858A CN1048994A CN 1048994 A CN1048994 A CN 1048994A CN 89107858 CN89107858 CN 89107858 CN 89107858 A CN89107858 A CN 89107858A CN 1048994 A CN1048994 A CN 1048994A
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Abstract
A kind of forging and device of large-size steam turbine titanium alloy linear leaf, it is the mould structure that adopts totally-enclosed, monolateral gap, dark detent, adopt the nearly β forging of 20 ℃ of heating below transformation temperature on the technology, and cut the step work step in the middle of between rough forge and finish forge, adopting, after final heat treatment, the low temperature pressurize that is lower than 20 ℃ of heating of heat-treatment of annealing temperature in mould is proofreaied and correct.Adopt this technology and device, can realize the whole finish forge to large-size steam turbine titanium alloy linear leaf on die hammer, product only needs a small amount of polishing, polishes the use of just can installing.
Description
The invention belongs to the hot-working field, relate to the improvement of large-size steam turbine linear leaf forging and device.
Domestic finish forge large-size steam turbine titanium alloy linear leaf does not also have antecedent; The process of external finish forge large-size steam turbine titanium alloy linear leaf and used equipment and device are:
At process aspect: 1. titanium alloy blank is heated to and carries out die forging below the transformation temperature about 40 ℃, promptly so-called conventional the forging.Produce titanium blade with conventional forging method, not only low, the malleable temperature range of forging temperature is narrow, resistance of deformation makes the forge crack easily owing to temperature drop of blade edge and root of blade (blade and tenon intersection) greatly; And conventional its corrosion resistance of titanium blade of forging is relatively poor.So some country as Mitsubishi heavy industry and the refreshing iron company that produces once adopted β to forge, soon the Ti-6Al-4V titanium alloy blank is heated under the above 20-30 of transformation temperature ℃ even the higher temperature and carries out die forging.β forges the processability that can improve material and improves the sensitiveness of cryogenic forging to crackle, also helps improving the corrosion resistance and the fracture toughness of titanium blade, but β forges significantly reduction plasticity and fatigue behaviour.Therefore, for the linear leaf that the long-life uses and has vibration to require, it not is to be reasonably that β forges, desirable forging method.2., differ the most about 15 times linear leaf, in order to prevent to forge and cooling causes that blade edge and root of blade (blade and tenon intersection) cracking and tenon and blade deflection are too greatly different and influences structure property for the thickness on tenon and the blade cross section.Simultaneously in order to simplify technology; the external big blade production of steam turbine is generally adopted and is forged and weld the method that combines; be about to tenon and in the Wolfram Inert Gas of argon shield, be welded into integral body with finish forge blade (blade); this comes down to the combination of finish forge and welding procedure, has obviously increased the complexity of technology and the limitation of finish forge.
Aspect the equipment and mold device: abroad mainly on forcing press, forge, utilize the guide pillars and bushes that is provided with on the mould to reduce and offset to guarantee the dimensional accuracy of finish forge production blade.The U.S. also has on high energy rate forging hammer and to adopt closed die forging to produce large-size steam turbine with the Ti-6Al-4V titanium blade.Owing to do not find rational process, therefore, no matter on forcing press or hammer, to forge, the leaf curling and the profile problem on deformation that cause because of elastic resilience, cooling and heat treatment do not have fine solution.
The objective of the invention is to provide a kind of new process and the mould structure that is used on the die hammer of finish forge large-size steam turbine titanium alloy linear leaf.Because technical innovation, blade and tenon one are swaged into, and leaf curling and profile problem on deformation that blade offsetting, low temperature fracture, elastic resilience, cooling and heat treatment cause have been solved, thereby improved the form accuracy and the dimensional accuracy of blade, only needed a small amount of polishing, polish the use of just can installing.Because the appropriate design of base and rough forge work step, the performance at each position of blade meets the specification fully.
Technical solution of the present invention is on die hammer, to adopt the open die forging, impressing forging structure of totally-enclosed, monolateral gap, dark detent; Adopt the nearly β forging of 20 ℃ of heating below transformation temperature on the technology, and side cut work step in the middle of between rough forge and finish forge, adopting, proofread and correct in the low temperature pressurize that in mould, is lower than 20 ℃ of heating of heat-treatment of annealing temperature after the heat treatment at last.
Accompanying drawing one is a kind of die device of realizing the inventive method.Wherein 1. being patrix, 2. is detent, is monolateral gap 3., 5., 4. is counterdie, 6. is burr storehouse portion, 7. is burr bridge portion, 8. is the blade die cavity, for irritating lead bath, 10. is jaw 9..
Die device shown in the accompanying drawing one, module up and down 1., made the mould structure of totally-enclosed, monolateral gap and dark detent on 4., the height of its detent is greater than the maximum ga(u)ge at blank (tenon position), be as the criterion can guarantee that patrix contact blank generation plastic deformation has entered in the counterdie detent before, chocking construction becomes vertical monolateral gap (shown in accompanying drawing one A-A, B-B section) according to the direction segment design of the horizontal component that the blade profile torsional angle causes.Adopt such die device and process of the present invention can be implemented on the die hammer finish forge to large-size steam turbine titanium alloy linear leaf.The subordinate list 1 at this specification end to subordinate list 7 has provided on 63 tons of rice counter-blow hammers the 710(millimeter) large-size steam turbine final stage Ti-6Al-4V titanium alloy linear leaf carries out the technical data of whole precision forging, the performance at each position of blade meets the specification fully as can be seen, has reached purpose of the present invention.
The technical characterstic of apparatus of the present invention and technology is:
Aspect device: for preventing in the mould strike process because the horizontal component that the blade profile torsional angle causes offsets mould generation vertical and horizontal changing of the relative positions blade, this device is designed to totally-enclosed detent, and vertically detent is designed to monolateral gap (shown in accompanying drawing one A-A, B-B section) according to the direction of profile torsional angle generation level offsetting power, can guarantee offsetting amount minimum like this, thereby improve the dimensional accuracy of blade.The another one characteristics of this device are, the height of detent is greater than the maximum ga(u)ge at blank (tenon position), and make patrix enter counterdie before contact blank generation plastic deformation to end in the button (seeing accompanying drawing one).Therefore, detent has not only played stop and has offsetted, and has guide effect simultaneously, and then has improved the precision of blade.
At process aspect: (1), with blank heating 20 ℃ of forgings under the transformation temperature of this material, promptly so-called nearly β forges.1., improve the heats forged temperature and can reduce the content of primary phase in the tissue benefit of doing like this has following 4 points:, thereby solved little and the problem that intensity is low of tenon position deflection; 2., reduce resistance of deformation, forge through the nearly β of actual measurement proof and be about the 1/3-1/2 of conventional forging deformation drag, thereby improved the ability of utilizing of equipment effectively; 3., improve the fillibility and the blade forming performance of material; 4., raising heats forged temperature can solve in the forging process and cause blade intake and exhaust edge and root low temperature forge crack problem and reduce the elastic resilience problem because of temperature drop.(2), adopt in the middle of the side cut work step, promptly between rough forge and finish forge, utilize and forge the burr that back waste heat excision rough forge produces.1., reduce the finish-forging resistance of deformation benefit of doing like this has:; 2., guarantee the dimensional accuracy on the blade vertical direction, this is the key that realizes precision die forging.(3), blade after 800 ℃ of annealing in process, blade is reheated below the annealing temperature 20 ℃ of insulations 30 minutes, be placed in the precision forging die pressurize 2-3 minute then, proofread and correct in the promptly so-called low temperature pressurize mould.Such bearing calibration, the one, can proofread and correct leaf curling and profile distortion that forging, cooling and heat treatment cause, the 2nd, can alleviate and eliminate blade and proofread and correct the redeformation that the back causes because of elastic resilience.It is the key that guarantees the blade shape precision that pressurize is proofreaied and correct.
The invention process is convenient, and process stabilizing, reliable is with the titanium alloy large-sized steam turbine last stage 710(of the Ti-6Al-4V millimeter of the present invention's production) the lacing film operation on 200,000 kilowatts of Steam Turbine of linear leaf plan.
Method of the present invention is applicable to (alpha+beta) diphasic titanium alloy, also can be applied to α type, nearly α type and nearly beta titanium alloy.
Subordinate list three:
Claims (2)
1, a kind of on die hammer, adopt the process of open die forging, impressing forging finish forge large-size steam turbine titanium alloy linear leaf, it is characterized in that adopting the mould structure of totally-enclosed, monolateral gap, dark detent, adopt the nearly β forging of 20 ℃ of heating below transformation temperature on the technology, and side cut work step in the middle of between rough forge and finish forge, adopting, in the end after the heat treatment, the low temperature pressurize that is lower than 20 ℃ of heating of heat-treatment of annealing temperature in mould is proofreaied and correct.
2, a kind of device of forming by module up and down of realizing claim 1, it is characterized in that on module up and down, making the mould structure of totally-enclosed, monolateral gap and dark detent, its detent height affair needs to guarantee that patrix contact blank generation plastic deformation has entered counterdie before and ended in the button, and chocking construction becomes vertical monolateral gap according to the direction segment design of the horizontal component that the blade profile torsional angle causes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89107858 CN1048994A (en) | 1989-10-18 | 1989-10-18 | Large-size steam turbine titanium alloy linear leaf forging and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89107858 CN1048994A (en) | 1989-10-18 | 1989-10-18 | Large-size steam turbine titanium alloy linear leaf forging and device |
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| Publication Number | Publication Date |
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| CN1048994A true CN1048994A (en) | 1991-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 89107858 Pending CN1048994A (en) | 1989-10-18 | 1989-10-18 | Large-size steam turbine titanium alloy linear leaf forging and device |
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| CN (1) | CN1048994A (en) |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100548530C (en) * | 2004-03-29 | 2009-10-14 | 斯内克马公司 | The forging mold that has labelling apparatus |
| CN101648254B (en) * | 2009-08-28 | 2010-12-08 | 哈尔滨工业大学 | Process for forging hydrogenated titanium alloy forging blade |
| CN101618499B (en) * | 2008-07-04 | 2010-12-29 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for eliminating seaming coarse grains of rolling vane |
| CN101947633A (en) * | 2010-09-11 | 2011-01-19 | 无锡透平叶片有限公司 | Die forging process and special die for final stage blade of large half-RPM (Revolution per Minute) nuclear turbine |
| CN101691008B (en) * | 2009-03-19 | 2011-06-22 | 无锡透平叶片有限公司 | Structural design method of TC11 alloy blisk precision forging |
| CN101791671B (en) * | 2009-12-22 | 2011-08-17 | 沈阳黎明航空发动机(集团)有限责任公司 | Precision forging method of titanium alloy blade |
| CN102266901A (en) * | 2011-07-14 | 2011-12-07 | 西北工业大学 | Forging method capable of reducing deformation resistance of TC4 titanium alloy blade |
| CN102319864A (en) * | 2011-07-14 | 2012-01-18 | 西北工业大学 | Forging method for reducing forging temperature of TC4 alloy blade |
| CN102319865A (en) * | 2011-07-14 | 2012-01-18 | 西北工业大学 | Forging method for improving mechanical property of TC4 alloy blade |
| CN102397977A (en) * | 2011-10-25 | 2012-04-04 | 机械科学研究院浙江分院有限公司 | Superplastic forming method of titanium alloy turbine blade with adoption of silicon carbide rod heating method |
| CN102513486A (en) * | 2011-12-16 | 2012-06-27 | 陕西宏远航空锻造有限责任公司 | Die forging method for titanium alloy forge pieces |
| CN103264138A (en) * | 2013-05-10 | 2013-08-28 | 西安航空动力股份有限公司 | Precision forging method for miniature TC11 titanium alloy blades |
| CN104308455A (en) * | 2014-08-13 | 2015-01-28 | 哈尔滨工业大学 | Method for improving forging properties of gamma-TiAl alloy through hydrogenation |
| CN104525810A (en) * | 2014-12-22 | 2015-04-22 | 西安西工大超晶科技发展有限责任公司 | Titanium alloy forging semi-hot state precision die forging forming process |
| CN104550588A (en) * | 2014-12-26 | 2015-04-29 | 无锡透平叶片有限公司 | Numerically-controlled free-forging distributing drawing-out blank-forming technology for blade-like forging |
| CN105499464A (en) * | 2016-01-11 | 2016-04-20 | 无锡透平叶片有限公司 | Steam turbine separation plate blade mold and designing method thereof |
| CN107774852A (en) * | 2017-11-30 | 2018-03-09 | 无锡透平叶片有限公司 | A kind of compressor blade forging process for fuel forming method |
| CN109822028A (en) * | 2019-03-05 | 2019-05-31 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Press forges titanium alloy forging anti-deformation control method |
| CN110842471A (en) * | 2019-11-04 | 2020-02-28 | 中车长春轨道客车股份有限公司 | Shaping, correcting and manufacturing method for lower reinforcing plate of stainless steel side wall window |
-
1989
- 1989-10-18 CN CN 89107858 patent/CN1048994A/en active Pending
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100548530C (en) * | 2004-03-29 | 2009-10-14 | 斯内克马公司 | The forging mold that has labelling apparatus |
| CN101618499B (en) * | 2008-07-04 | 2010-12-29 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for eliminating seaming coarse grains of rolling vane |
| CN101691008B (en) * | 2009-03-19 | 2011-06-22 | 无锡透平叶片有限公司 | Structural design method of TC11 alloy blisk precision forging |
| CN101648254B (en) * | 2009-08-28 | 2010-12-08 | 哈尔滨工业大学 | Process for forging hydrogenated titanium alloy forging blade |
| CN101791671B (en) * | 2009-12-22 | 2011-08-17 | 沈阳黎明航空发动机(集团)有限责任公司 | Precision forging method of titanium alloy blade |
| CN101947633A (en) * | 2010-09-11 | 2011-01-19 | 无锡透平叶片有限公司 | Die forging process and special die for final stage blade of large half-RPM (Revolution per Minute) nuclear turbine |
| CN102266901A (en) * | 2011-07-14 | 2011-12-07 | 西北工业大学 | Forging method capable of reducing deformation resistance of TC4 titanium alloy blade |
| CN102319864A (en) * | 2011-07-14 | 2012-01-18 | 西北工业大学 | Forging method for reducing forging temperature of TC4 alloy blade |
| CN102319865A (en) * | 2011-07-14 | 2012-01-18 | 西北工业大学 | Forging method for improving mechanical property of TC4 alloy blade |
| CN102397977A (en) * | 2011-10-25 | 2012-04-04 | 机械科学研究院浙江分院有限公司 | Superplastic forming method of titanium alloy turbine blade with adoption of silicon carbide rod heating method |
| CN102513486A (en) * | 2011-12-16 | 2012-06-27 | 陕西宏远航空锻造有限责任公司 | Die forging method for titanium alloy forge pieces |
| CN103264138A (en) * | 2013-05-10 | 2013-08-28 | 西安航空动力股份有限公司 | Precision forging method for miniature TC11 titanium alloy blades |
| CN103264138B (en) * | 2013-05-10 | 2015-05-27 | 西安航空动力股份有限公司 | Precision forging method for miniature TC11 titanium alloy blades |
| CN104308455A (en) * | 2014-08-13 | 2015-01-28 | 哈尔滨工业大学 | Method for improving forging properties of gamma-TiAl alloy through hydrogenation |
| CN104525810A (en) * | 2014-12-22 | 2015-04-22 | 西安西工大超晶科技发展有限责任公司 | Titanium alloy forging semi-hot state precision die forging forming process |
| CN104550588A (en) * | 2014-12-26 | 2015-04-29 | 无锡透平叶片有限公司 | Numerically-controlled free-forging distributing drawing-out blank-forming technology for blade-like forging |
| CN105499464A (en) * | 2016-01-11 | 2016-04-20 | 无锡透平叶片有限公司 | Steam turbine separation plate blade mold and designing method thereof |
| CN107774852A (en) * | 2017-11-30 | 2018-03-09 | 无锡透平叶片有限公司 | A kind of compressor blade forging process for fuel forming method |
| CN109822028A (en) * | 2019-03-05 | 2019-05-31 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Press forges titanium alloy forging anti-deformation control method |
| CN110842471A (en) * | 2019-11-04 | 2020-02-28 | 中车长春轨道客车股份有限公司 | Shaping, correcting and manufacturing method for lower reinforcing plate of stainless steel side wall window |
| CN110842471B (en) * | 2019-11-04 | 2021-07-27 | 中车长春轨道客车股份有限公司 | Shaping, correcting and manufacturing method for lower reinforcing plate of stainless steel side wall window |
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