CN102836946A - Roll forging forming process for last stage of moving blade of 600MW unit steam turbine - Google Patents
Roll forging forming process for last stage of moving blade of 600MW unit steam turbine Download PDFInfo
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- CN102836946A CN102836946A CN201210332239XA CN201210332239A CN102836946A CN 102836946 A CN102836946 A CN 102836946A CN 201210332239X A CN201210332239X A CN 201210332239XA CN 201210332239 A CN201210332239 A CN 201210332239A CN 102836946 A CN102836946 A CN 102836946A
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Abstract
The invention discloses a roll forging forming process for a last stage of moving blade of a 600MW unit steam turbine and belongs to the technical field of blade forging. The roll forging forming process for the last stage of moving blade of the 600MW unit steam turbine comprises the following implementing stages: a stage of cogging, i.e. roll forging cogging and die forging cogging; a stage of forming roll forging and finish forging, i.e. forming roll forging, finish forging, trimming and shape calibration; and a stage of heat treatment, i.e. high temperature tempering, quenching and tempering treatment. The roll forging forming process for the last stage of moving blade of the 600MW unit steam turbine is simple and convenient to operate, has a low cost and has a low requirement on the tonnage of forging equipment; the equipment is simple and is convenient to maintain; blade profiles have small allowance, are uniformly distributed and have good consistency; the finish machining and polishing speed is increased; the corrosion resistance and the mechanical performance of the blade are improved; the yield strength and the tensile strength of a fine rolled blade are superior to those of a die forged blade; the production processing noise pollution is reduced; and the labor environment is improved.
Description
Technical field
The present invention relates to the blade FMT, especially a kind of last stage rotor blade of steam turbine rollforming technology.
Background technology
At present, the production of last stage rotor blade of steam turbine mainly is that raw material are carried out die forging; The blade of producing through contour forging technique, because blade is in the process of cooling, deflection is bigger; Therefore just need the deflection of reservation bigger, need the surplus of processing big, waste of material is more; Cost is expensive, and the surplus of blade surface is inhomogeneous, and the uniformity of blade surface surplus is bad.Simultaneously, turbine blade is according to the difference of model, and its size is different, and the different dies that therefore needs is produced, and when big in batches, the production cost of blade is lower, but when blade little in batches, gauge size not simultaneously, its production cost is higher.
Summary of the invention
Goal of the invention of the present invention is: the problem to above-mentioned existence, a kind of 600MW power generator turbine final stage moving blade rollforming technology easy and simple to handle, with low cost is provided, and little to the forging equipment tonnage demand; And equipment is simple; Be convenient to safeguard that the blade profile surplus high conformity that is evenly distributed for a short time improves fine finishining and rubbing down speed; And the corrosion resistance and the mechanical performance of raising blade; The yield strength and the tensile strength of smart roller blade are superior to the die forging blade, reduce the production and processing noise pollution, improve work situation.
The technical scheme that the present invention adopts is following:
600MW power generator turbine final stage moving blade rollforming technology of the present invention, through realizing with the next stage:
The cogging stage
A. roll forging cogging
Raw material is heated to 1150 ° of C ± 10 ° C in heating furnace, and after being incubated 90 minutes, from heating furnace, takes out again;
Raw material is carried out four roll forging in three type grooves, make the middle shape line length 330 ± 5 of blade, the blade root blank is long by 145 ± 5, and the integral shroud blank is long by 60 ± 10, blank length overall 530 ± 10;
B. die forging cogging
If the material temperature is not less than 900 ° of C, then blank is put into 80MN forcing press forging die and carry out die-forging forming, cut overlap after the blade demoulding, again forging is put into the sand pond and cool off;
If the material temperature is lower than 900 ° of C, then blank shove charge again is heated to 1150 ° of C ± 10 ° C, and after being incubated 30 minutes, putting into 80MN forcing press forging die and carry out die forging, put into the sand pond after the side cut and cool off;
Roll forging, finish-forging stage
A. roll forging
Forging is heated to 1150 ° of C ± 10 ° C, and comes out of the stove after being incubated 60 minutes, again forging is carried out twice roll forging in two type grooves, make blade shaped line length 650 ± 10, the integral shroud boss is long by 60 ± 10, length overall 920 ± 10;
B. finish-forging
If the material temperature is not less than 900 ° of C, then blank is put into 80MN forcing press forging die die-forging forming;
If the material temperature is lower than 900 ° of C, then forging is reheated to 1150 ° of C ± 10 ° C, and putting into 8000T forcing press finish-forging after being incubated 30 minutes;
C. school shape is cut edge
Change the 1600T forcing press after the blade demoulding over to and cut edge, the forging after the side cut is put into 8000T forcing press forging die once more and is carried out school shape, puts into the sand pond again and cools off;
Heat treatment stages
A. high tempering
With qualified forging in 750 ° of C insulation after 6 hours, the air cooling of coming out of the stove;
B. quench
Forging behind the high tempering was heated to 1030 ± 5 ° of C insulations after 90 minutes, and it is air-cooled to come out of the stove;
C. tempering
Forging is handled through double tempering, and air-cooled.
Owing to adopted above-mentioned technology; Because blade steam passage part roller rest forging molding, roll forging equipment is mainly used in shaping, so do not need very large-tonnage; The roll forging former is merely 1/3 of die-forging forming equipment; And cost of equipment is 1/3 of counter-blow hammer or a die hammer less than 1/10 of high power screw press, and device structure is simple; The blade profile surplus high conformity that is evenly distributed for a short time: because roll-forging process can effectively be controlled the blade profile surplus, the smart roller good manufacturability of blade, controllability is strong, can adjust surplus according to product demand.Because it is less to forge side force, mould is difficult for dislocation, helps improving the blade profile precision.The high more institute of forging precision made allowance is more evenly more little; Can improve fine finishining and rubbing down speed; The too high back cooling of blade surface temperature produced annealing or quenching distortion when the loss that both can reduce machining and rubbing down material also can be avoided later process and process because of cutting stress or rubbing down; Especially to air cooled hardenability preferably material can not produce the state of hardening and cause the be full of cracks of blade surface, and the raising reliability of products that reduces production costs.The metallic fiber streamline of blade is not cut off and has kept continuity, thereby has improved the corrosion resistance and the mechanical performance of blade, increase the service life, and the yield strength of blade and tensile strength all is superior to the die forging blade.Because short between the contact area of roll forging mould and forging hour, metal and mould slip relatively are little, stressed little, thereby it is little to wear and tear in the roll forging process, and die life is long.The stock utilization of smart roller blade is about 50%, and the utilization rate of band surplus die forging blade material is 25%～30%, and the stock utilization of square steel milling blade has only 15%.Roll forging operation noise is little, realizes mechanization and automation mechanized operation easily, improves work situation, reduces noise pollution.600MW power generator turbine final stage moving blade rollforming technology of the present invention has been opened up a new blade production approach, and practicality is good.
600MW power generator turbine final stage moving blade rollforming technology of the present invention, in the cogging stage, raw material carries out four roll forging in three type grooves, be specially:
Raw material carries out the roll forging first time in the first type groove after the manipulator jaw clamps;
After withdrawing from, manipulator jaw half-twist gets into the first type groove once more and carries out the roll forging second time;
After withdrawing from, the manipulator jaw rotates back to 0 ° of position, moves to the second type groove and carries out roll forging for the third time;
After withdrawing from, the manipulator jaw does not rotate and moves to the 3rd type groove and carry out the 4th roll forging;
Blank after roller is long is retreated, and is traversing to the first type groove, the big arm Rotate 180 of manipulator °, and to the feeding of 80MN forcing press forging die.
Owing to adopted above-mentioned technology, make raw material carry out four roll forging through three type grooves, make raw material elongated; And shape begins to take shape, and wherein after the roll forging for the first time, the quilt of raw material is elongated for the first time; Then with carrying out the roll forging second time behind the blade half-twist; Roll forging this time can be tentatively definite with the blade root and the integral shroud position of blade, and shape begins to take shape, but length is constant; Through roll forging for the third time, the length of blade is elongated again, the vane thickness attenuation; Through the 4th roll forging, make the size of blade tentatively reach predetermined requirement at last, particularly make the middle shape line length 330 ± 5 of blade; The blade root blank is long by 145 ± 5, and the integral shroud blank is long by 60 ± 10, blank length overall 530 ± 10; Thereby can guarantee the size of following process, for follow-up processing is got ready.Because the continuous roller of roll-forging process is pricked, the metallic fiber streamline of blade is not cut off and has kept continuity, thereby has improved the corrosion resistance and the mechanical performance of blade, increase the service life, and the yield strength of blade and tensile strength all is superior to the die forging blade.
600MW power generator turbine final stage moving blade rollforming technology of the present invention, roll forging, finish-forging are in the stage, and forging carries out twice roll forging in two type grooves, be specially:
The forging manipulator jaw of packing into from the side, and in the first type groove, carry out the roll forging first time;
After withdrawing from, the manipulator jaw moves to the second type groove and carries out the roll forging second time;
Blank behind the roller is retreated, and is traversing to the first type groove, the big arm Rotate 180 of manipulator °, and to the feeding of 80MN forcing press forging die.
Because after having adopted above-mentioned technology, vanes to cross roll forging for the first time, blank is elongated, therefore need pass through secondary roll forging once more, make forging forming.After vanes is crossed twice roll forging, the various sizes on the blade are shaped basically, wherein; Shape line length 650 ± 10 in the middle of the blade, the blade root blank is long by 210 ± 10, integral shroud blank long 60 ± 10; Blank length overall 920 ± 10 through the blade after twice roll forging, has been controlled the blade profile surplus effectively; Because it is less to forge side force, mould is difficult for dislocation, helps improving the blade profile precision.The high more institute of forging precision made allowance is more little; The too high back cooling of blade surface temperature produces annealing or quenches and distortion in the time of can improving fine finishining and process because of cutting stress or rubbing down, thus especially to air cooled hardenability preferably material can not produce the state of hardening and cause the be full of cracks of the blade surface raising reliability of products that reduces production costs.
600MW power generator turbine final stage moving blade rollforming technology of the present invention, heat treatment stages, double tempering is specially:
C. tempering for the first time: in 24 hours, forging is packed into is warming up to 640 ± 5 ° of C in the well stove again, and after being incubated 10 hours, it is air-cooled to come out of the stove;
D. tempering for the second time: furnace temperature according to the tempering first time after the hardness of lot blade adjust, be warming up to 640 ± 5 ° of C insulations 10 hours in the well stove of packing into, air-cooled after the discharging.
Owing to adopted above-mentioned technology, through double tempering, reduced or eliminated the quenching internal stress, prevent workpiece deformation or cracking, and can guarantee that blade obtains the various mechanical properties of technological requirement, will guarantee that particularly blade hardness reaches requirement.Process tempering for the first time, the tissue of steel tends towards stability, and the fragility of hardened steel reduces, and toughness and plasticity improve, and eliminate perhaps and reduce quenching stress, and the shape of stabilized steel and size prevent quench part distortion and cracking, high tempering can also improve machinability.Tempering for the second time mainly is to be the replenishing of the tempering first time, thereby the mechanical property of guaranteeing blade reaches requirement, according to the needs of reality, also can carry out repeatedly temper more certainly.
600MW power generator turbine final stage moving blade rollforming technology of the present invention, said blank adopt the 1Cr12Ni2W1Mo1V material to process.
Blank adopts above-mentioned stainless steel material to process, thereby can guarantee that electric furnace smelting electroslag remelting delta ferrite level is no more than 5%, can improve the corrosion resistance and the mechanical performance of blade, has prolonged the service life of blade.
In sum, owing to adopted technique scheme, the invention has the beneficial effects as follows:
1,600MW power generator turbine final stage moving blade rollforming technology of the present invention, device structure is simple, and is easy and simple to handle, with low cost;
2,600MW power generator turbine final stage moving blade rollforming technology of the present invention; Because roll-forging process can effectively be controlled the blade profile surplus, the smart roller good manufacturability of blade, controllability is strong; Can adjust surplus according to product demand, the blade profile surplus high conformity that is evenly distributed for a short time;
3,600MW power generator turbine final stage moving blade rollforming technology of the present invention, because the forging side force is less, mould is difficult for dislocation, helps improving the blade profile precision; The high more institute of forging precision made allowance is more evenly more little; Can improve fine finishining and rubbing down speed; The too high back cooling of blade surface temperature produced annealing or quenching distortion when the loss that both can reduce machining and rubbing down material also can be avoided later process and process because of cutting stress or rubbing down, thus especially to air cooled hardenability preferably material can not produce the state of hardening and cause the be full of cracks of the blade surface raising reliability of products that reduces production costs.
4,600MW power generator turbine final stage moving blade rollforming technology of the present invention; The metallic fiber streamline of blade is not cut off and has kept continuity; Thereby the corrosion resistance and the mechanical performance of blade have been improved; Increase the service life, and the yield strength of blade and tensile strength all are superior to the die forging blade.
5,600MW power generator turbine final stage moving blade rollforming technology of the present invention, roll forging operation noise is little, realizes mechanization and automation mechanized operation easily, improves work situation, reduces noise pollution, has opened up a new blade production approach, and practicality is good.
Description of drawings
The present invention will explain through example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is the structural representation of 60MW power generator turbine final stage moving blade among the present invention.
The specific embodiment
Disclosed all characteristics in this specification, or the step in disclosed all methods or the process except mutually exclusive characteristic and/or the step, all can make up by any way.
Disclosed arbitrary characteristic in this specification (comprising any accessory claim, summary and accompanying drawing) is only if special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, only if special narration, each characteristic is an example in a series of equivalences or the similar characteristics.
600MW power generator turbine final stage moving blade rollforming technology of the present invention, through realizing with the next stage:
Require raw-material chemical composition such as following table (Wt%):
Raw material just adopts the 1Cr12Ni2W1Mo1V stainless steel material to process.
The cogging stage
A. roll forging cogging
Raw material is heated to 1150 ° of C ± 10 ° C in heating furnace, and is incubated 90 minutes, from heating furnace, takes out gradually again;
Raw material carries out the roll forging first time in the first type groove (K3 forge rolling die) under the effect of manipulator jaw;
After withdrawing from, manipulator jaw half-twist gets into the first type groove (K3 forge rolling die) once more and carries out the roll forging second time;
After withdrawing from, the manipulator jaw rotates back to 0 ° of position, moves to the second type groove (K2 forge rolling die) and carries out roll forging for the third time;
After withdrawing from, the manipulator jaw does not rotate and moves to the 3rd type groove (K1 forge rolling die) and carry out the 4th roll forging;
Make the middle shape line length 330 ± 5 of blade, the blade root blank is long by 145 ± 5, and the integral shroud blank is long by 60 ± 10, blank length overall 530 ± 10;
Blank after roller is long is retreated, and is traversing to the first type groove, manipulator jaw Rotate 180 °, and to the feeding of 80MN forcing press forging die;
C. die forging cogging
If the material temperature is not less than 900 ° of C, then blank is put into 80MN forcing press forging die and carry out die-forging forming, require all around to be full of, cut overlap after the blade demoulding, again forging is put into the slow cooling of sand pond;
If the material temperature is lower than 900 ° of C, then blank shove charge again is heated to 1150 ° more than the C, and after being incubated 30 minutes, putting into 80MN forcing press forging die and carry out die forging, be full of around requiring, put into the slow cooling of sand pond, cooling back abrasive jet cleaning burr;
Roll forging, finish-forging stage
A. roll forging
Forging packed into is heated to 1150 ° of C in the box type heater, and comes out of the stove by part after being incubated 50 minutes, the forging manipulator jaw of packing into from the side, and in the first type groove (K2 forge rolling die), carry out the roll forging first time;
After withdrawing from, the manipulator jaw moves to the second type groove (K1 forge rolling die) and carries out the roll forging second time;
Make blade shaped line length 650 ± 10, the integral shroud boss is long by 60 ± 10, length overall 920 ± 10;
Blank behind the roller is retreated, and is traversing to the first type groove (K2 forge rolling die), manipulator jaw Rotate 180 °, and to the feeding of 80MN forcing press forging die;
B. finish-forging
If the material temperature is not less than 900 ° of C, then the blank after the roller length is put into 80MN forcing press forging die die-forging forming, require die cavity to be full of;
If the material temperature is lower than 900 ° of C, then forging is reheated to 1150 ° of C, and putting into 8000T forcing press finish-forging after being incubated 30 minutes;
C. school shape is cut edge
Change the 1600T forcing press after the blade demoulding over to and cut edge, the forging after the side cut is put into 8000T forcing press forging die once more and is carried out school shape, puts into the slowly cooling of sand pond then, and cooling back abrasive jet cleaning burr is folding;
Heat treatment stages
A. high tempering
Forging is put into 750 ° of C insulations of high temperature well stove 6 hours, be placed on natural air cooling in the sand pond after coming out of the stove;
B. quench
Qualified forging was heated to 1030 ± 5 ° of C insulation after 90 minutes in stove, put rapidly after coming out of the stove to go up air-cooledly to air-cooled, and sampling observation hardness in cooling back is understood the quenching situation;
C. tempering for the first time: in 24 hours, again the forging well formula of packing into is returned and is warming up to 640 ± 5 and be incubated 10 hours in the well stove, put after coming out of the stove to air-cooled and go up air-cooled;
D. tempering for the second time: furnace temperature according to the tempering first time after the hardness of examination at random blade adjust, be warming up to 640 ± 5 ° of C in the well stove of packing into, be incubated 10 hours, put on air-cooled air-cooled after coming out of the stove.
The blade that 600MW power generator turbine final stage moving blade rollforming technology of the present invention is forged, its room-temperature mechanical property such as following table:
As shown in Figure 1; Through the blade that adopts 600MW power generator turbine final stage moving blade rollforming explained hereafter of the present invention to go out; The blade section of being separated into is detected separately; Wherein blade is separated into A, B, C, D, E, F, G, H, I, J, K, L, M cross section, the inner arc clearance delta H to each cross section detects with back of the body arc clearance delta R respectively, and concrete data are as shown in the table:
Can learn by last table; The blade of processing through 600MW power generator turbine final stage moving blade rollforming technology of the present invention; The blade profile surplus high conformity that is evenly distributed for a short time, and because roll-forging process can effectively be controlled the blade profile surplus, the smart roller good manufacturability of blade; Controllability is strong, can adjust surplus according to product demand.Because it is less to forge side force, mould is difficult for dislocation, helps improving the blade profile precision.The high more institute of forging precision made allowance is more evenly more little; Can improve fine finishining and rubbing down speed; The too high back cooling of blade surface temperature produced annealing or quenching distortion when the loss that both can reduce machining and rubbing down material also can be avoided later process and process because of cutting stress or rubbing down, especially to air cooled hardenability preferably material can not produce the state of hardening and cause be full of cracks and the raising reliability of products that reduces production costs of blade surface.
The present invention is not limited to the aforesaid specific embodiment.The present invention expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.
Claims (5)
1.600MW power generator turbine final stage moving blade rollforming technology is characterized in that: it is through realizing with the next stage:
The cogging stage
The roll forging cogging
Raw material is heated to 1150 ° of C ± 10 ° C in heating furnace, and after being incubated 90 minutes, from heating furnace, takes out again;
Raw material is carried out four roll forging in three type grooves, make the middle shape line length 330 ± 5 of blade, the blade root blank is long by 145 ± 5, and the integral shroud blank is long by 60 ± 10, blank length overall 530 ± 10;
The die forging cogging
If the material temperature is not less than 900 ° of C, then blank is put into 80MN forcing press forging die and carry out die-forging forming, cut overlap after the blade demoulding, again forging is put into the sand pond and cool off;
If the material temperature is lower than 900 ° of C, then blank shove charge again is heated to 1150 ° of C ± 10 °, and after being incubated 30 minutes, putting into 80MN forcing press forging die and carry out die forging, put into the sand pond after the side cut and cool off;
Roll forging, finish-forging stage
A. roll forging
Forging is heated to 1150 ° of C ± 10 °, and comes out of the stove after being incubated 60 minutes, again forging is carried out twice roll forging in two type grooves, make blade shaped line length 650 ± 10, the integral shroud boss is long by 60 ± 10, length overall 920 ± 10;
B. finish-forging
If the material temperature is not less than 900 ° of C, then blank is put into 80MN forcing press forging die die-forging forming;
If the material temperature is lower than 900 ° of C, then forging is reheated to 1150 ° of C ± 10 °, and putting into 8000T forcing press finish-forging after being incubated 30 minutes;
C. school shape is cut edge
Change the 1600T forcing press after the blade demoulding over to and cut edge, the forging after the side cut is put into 8000T forcing press forging die once more and is carried out school shape, puts into the sand pond again and cools off;
Heat treatment stages
High tempering
With qualified forging in 750 ° of C insulation after 6 hours, the air cooling of coming out of the stove;
Quench
Forging behind the high tempering was heated to 1030 ± 5 ° of C insulations after 90 minutes, and it is air-cooled to come out of the stove;
C. tempering
Forging is handled through double tempering, and air-cooled.
2. 600MW power generator turbine final stage moving blade rollforming technology as claimed in claim 1 is characterized in that: in the cogging stage, raw material carries out four roll forging in three type grooves, be specially:
Raw material carries out the roll forging first time in the first type groove under the effect of manipulator jaw;
After withdrawing from, manipulator jaw half-twist gets into the first type groove once more and carries out the roll forging second time;
After withdrawing from, the manipulator jaw rotates back to 0 ° of position, moves to the second type groove and carries out roll forging for the third time;
After withdrawing from, the manipulator jaw does not rotate and moves to the 3rd type groove and carry out the 4th roll forging;
Blank after roller is long is retreated, and is traversing to the first type groove, manipulator jaw Rotate 180 °, and to the feeding of 80MN forcing press forging die.
3. 600MW power generator turbine final stage moving blade rollforming technology as claimed in claim 2, it is characterized in that: roll forging, finish-forging are in the stage, and forging carries out twice roll forging in two type grooves, be specially:
The forging manipulator jaw of packing into from the side, and in the first type groove, carry out the roll forging first time;
After withdrawing from, the manipulator jaw moves to the second type groove and carries out the roll forging second time;
Blank behind the roller is retreated, and is traversing to the first type groove, the big arm Rotate 180 of manipulator °, and to the feeding of 80MN forcing press forging die.
4. like claim 1 or 2 or 3 described 600MW power generator turbine final stage moving blade rollforming technologies, it is characterized in that: heat treatment stages, double tempering is specially:
Tempering for the first time: in 24 hours, forging is packed into is warming up to 640 ± 5 ° of C in the well stove well stove again, and after being incubated 10 hours, it is air-cooled to come out of the stove;
Tempering for the second time: furnace temperature according to the tempering first time after the hardness of examination at random blade adjust, be warming up to 640 ± 5 ° of C insulations 10 hours in the well stove well stove of packing into, air-cooled after the discharging.
5. like claim 1 or 2 or 3 described 600MW power generator turbine final stage moving blade rollforming technologies, it is characterized in that: said blank adopts the 1Cr12NiW1Mo1V material to process.
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| CN103586392A (en) * | 2013-11-15 | 2014-02-19 | 西安航空动力股份有限公司 | Method for manufacturing large titanium alloy fan damping platform blade blank |
| CN103600012A (en) * | 2013-10-19 | 2014-02-26 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for preparing tenon-free depth end bent blade |
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| CN103600012A (en) * | 2013-10-19 | 2014-02-26 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for preparing tenon-free depth end bent blade |
| CN103600012B (en) * | 2013-10-19 | 2015-10-07 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of preparation method without tenon depth end bent blades |
| CN103586392A (en) * | 2013-11-15 | 2014-02-19 | 西安航空动力股份有限公司 | Method for manufacturing large titanium alloy fan damping platform blade blank |
| CN103586392B (en) * | 2013-11-15 | 2015-05-27 | 西安航空动力股份有限公司 | Method for manufacturing large titanium alloy fan damping platform blade blank |
| 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 |
| CN107971444A (en) * | 2016-10-25 | 2018-05-01 | 北京机电研究所 | A kind of design method of ultra-large type final blades cogging roll forging die enabling |
| CN107971444B (en) * | 2016-10-25 | 2019-11-26 | 北京机电研究所有限公司 | A kind of design method of ultra-large type final blades cogging roll forging die enabling |
| CN107598067A (en) * | 2017-09-18 | 2018-01-19 | 无锡宏达重工股份有限公司 | A kind of processing technology of X12CrMoWVNbN10 stator blades ring forging |
| CN108080558A (en) * | 2017-11-29 | 2018-05-29 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of processing technology of GH4648 alloys diversion window blade |
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|---|---|
| CN102836946B (en) | 2014-11-05 |
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Address after: Two, 618300 section, Zhuhai Road, Guanghan Economic Development Zone, Deyang, Sichuan, China Patentee after: Sichuan Haote Jinggong Equipment Co., Ltd. Address before: Two, 618300 section, Zhuhai Road, Guanghan Economic Development Zone, Deyang, Sichuan, China Patentee before: Sichuan Haote Oil Equipment Co.,Ltd. |