CN110899604A - Manufacturing method of slender shaft type rotor forging - Google Patents
Manufacturing method of slender shaft type rotor forging Download PDFInfo
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- CN110899604A CN110899604A CN201911192884.4A CN201911192884A CN110899604A CN 110899604 A CN110899604 A CN 110899604A CN 201911192884 A CN201911192884 A CN 201911192884A CN 110899604 A CN110899604 A CN 110899604A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/06—Making machine elements axles or shafts
- B21K1/12—Making machine elements axles or shafts of specially-shaped cross-section
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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Abstract
The invention relates to a manufacturing method of a slender shaft type rotor forging, belongs to the technical field of shaft type forging manufacturing, and solves the technical problems of ultrasonic flaw detection and low yield of mechanical performance strength uniformity indexes of the conventional rotor forging. The invention comprises the following steps: step 1, performing KD-method pre-drawing and gate-end blanking pressing jaw treatment on a steel ingot during a first firing time; step 2, carrying out upsetting and KD method drawing treatment on the steel ingot blank in the step 1 during the second heating; step 3, performing drawing-out on the blank to obtain a finished product for forging in the third firing, wherein the forging ratio of the third firing is more than or equal to 1.4, and the reduction rate of each anvil is more than or equal to 8%; and 4, tempering and heat preservation in the quenching and tempering heat treatment stage, wherein the tempering and heat preservation temperature at the riser end is 610 +/-5 ℃, the tempering and heat preservation temperature at the nozzle end is 608 +/-5 ℃, and the overall strength level of the rotor is adjusted to be consistent. The invention realizes the compaction of the defects of loose core and shrinkage cavity of the rotor forging, the purity of the rotor forging body and the uniformity of the structure and performance of each part.
Description
Technical Field
The invention relates to the technical field of shaft type forging manufacturing, in particular to a manufacturing method of a slender shaft type rotor forging.
Background
The rotor forging is used as a core component of the electric power unit, the quality and the reliability of the rotor forging directly influence the safe and stable operation of the unit, so that the requirements of various technical indexes of the rotor forging are strict, and particularly, the requirements on the purity, the compactness, the tissue uniformity and the mechanical strength fluctuation are high.
In recent years, along with the continuous increase of the power of the traditional energy generator set in China, the continuous improvement of the efficiency and the emergence of a newly-built large phase modulator set for solving the problems of new energy power generation grid connection of photovoltaic, wind energy and the like and the stable operation of an extra-high voltage alternating current and direct current power grid, the requirements on the technical indexes of a rotor forging piece are more and more strict, the indexes of the ultrasonic flaw detection and the mechanical property strength uniformity of the forging piece reach an extremely high level, and the forging piece has higher risk of disqualification or scrapping due to the fact that the two indexes exceed standards.
Disclosure of Invention
In view of the above analysis, the present invention aims to provide a method for manufacturing a slender shaft type rotor forging, so as to solve the technical problems of ultrasonic flaw detection and low yield of mechanical property and strength uniformity indexes of the rotor forging.
The purpose of the invention is mainly realized by the following technical scheme:
the invention discloses a method for manufacturing a slender shaft type rotor forging, which comprises the following steps:
and 4, tempering and heat preservation in the quenching and tempering heat treatment stage, wherein the tempering and heat preservation temperature at the riser end is 610 +/-5 ℃, the tempering and heat preservation temperature at the nozzle end is 608 +/-5 ℃, and the overall strength level of the rotor is adjusted to be consistent.
Further, in step 1, the first heat forging ratio during pre-drawing by the KD method is more than or equal to 1.5.
Further, in the step 1, the reduction rate of each anvil is more than or equal to 20% when the KD method is used for pre-drawing.
Further, in the step 1, blanking and press forging a jaw at the end of a water gap of the steel ingot subjected to pre-drawing by a KD method, cutting off the whole riser, wherein the weight of a blanking part is more than or equal to 8% of the weight of the ingot body, and the length-to-diameter ratio L/D of the steel ingot subjected to blanking is less than or equal to 2.5.
Further, in the step 2, the steel ingot is subjected to integral upsetting treatment, and the upsetting ratio is more than or equal to 2.
Further, in the step 2, the second heat forging ratio is more than or equal to 3 when the KD method is used for drawing.
Further, in step 2, the reduction rate of each anvil during KD-method drawing is more than or equal to 20%.
Further, in the step 2, after the KD method is drawn out, the crack defect of the blank shaft body needs to be thoroughly cleaned.
Furthermore, the total draw ratio of the rotor forging is more than or equal to 5, and the total draw ratio of the rotor forging is equal to the sum of the KD pre-draw ratio, the KD draw ratio and the draw ratio of the finished product.
Further, in the step 4, a well-type opening and closing furnace is adopted for quenching and tempering heat treatment, the well-type opening and closing furnace is divided into 14 temperature fields from top to bottom, when the slender shaft type rotor forging is charged, a water gap end of a steel ingot is arranged at the underground part of the well-type opening and closing furnace and corresponds to the 11 th to 14 th temperature fields, and the furnace temperature set in the 11 th to 14 th temperature fields of the underground part is 2 ℃ lower than that in the first to 10 th temperature fields of the overground part.
When the first heat forging is performed for KD method pre-drawing, a steel ingot is placed between a V anvil on KD and a V anvil under KD, two ends of the steel ingot are respectively a water opening end and a riser end, a pressing clamp handle is fed at the water opening end after KD pre-drawing, then water opening end waste and riser end waste are cut, upsetting and KD drawing are performed during the second heat, and then drawing of the third heat is performed to obtain a finished product.
Compared with the prior art, the invention can realize at least one of the following beneficial effects:
(1) the method has the advantages that the main deformation process of 'KD method pre-drawing, steel ingot water gap end pressing jaw + upsetting and KD method drawing' is combined with the controlled forging of the finished product producing process of the forged piece, and the tempering heat treatment partitioned temperature control technology is matched, so that the compaction of the defects of loose center and shrinkage cavity of the rotor forged piece, the purity of the rotor forged piece body and the uniformity of the structure and performance of each part are effectively ensured, the deformation, the structure and the strength uniformity of each part of the forged piece are ensured to be qualified, a good foundation is laid for the subsequent fine machining, assembly and stable operation of the rotor, and the use performance of the rotor is obviously improved.
(2) The invention adopts KD method to guarantee the center line of the forging to be consistent with the original center line of the steel ingot after pre-drawing and upsetting, the KD method drawn forging has good surface quality, and the forging crack and folding damage are light.
(3) The pre-elongated gate end direct blanking press jaw can ensure the cutting amount of the steel ingot gate end, prevent gate end blanks with poor metallurgical quality from participating in deformation or entering a forging body, and ensure the purity of the forging blank body.
(4) The forging method for controlling the heat of the finished product can effectively avoid the phenomenon of mixed crystals caused by the fact that the deformation of the heat of the finished product is small and the recrystallized structure cannot be obtained due to small strain or no strain at the center of the forged piece in the traditional method, thereby ensuring the uniformity of the structure and the grain size of each part of the forged piece.
(5) The tempering partitioned temperature control technology for quenching and tempering heat treatment ensures that the overall strength level of the rotor is consistent so as to meet the requirement of extremely strict volatility index during mechanical property inspection.
In the invention, the technical schemes can be combined with each other to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.
FIG. 1 is a schematic diagram of KD pre-drawing length of a slender shaft type rotor forging;
FIG. 2 is a side view of a slender shaft rotor forging KD in a pre-drawing length;
FIG. 3 is a schematic view of a nozzle end blanking clamp handle, a cut-off riser and nozzle end waste at the first fire;
FIG. 4 is a schematic view of a rotor forging of the slender shafts being upset by a second fire;
FIG. 5 is a schematic view of a slender shaft rotor forging drawn out by KD for the second fire;
FIG. 6 is a schematic view of a slender shaft rotor forging drawn out by a third fire;
FIG. 7 is a schematic view of quenching and tempering, tempering and charging of a rotor forging.
Reference numerals:
1-steel ingot; 2-water mouth end of steel ingot; 3-steel ingot riser end; 4-KD upper V anvil; 5-KD lower V anvil; 6-water gap waste; 7-a forceps handle; 8-discharge end material abandoning; 9-opening and closing the furnace body; 10-the ground; 11-base.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
Example 1
The embodiment provides a method for manufacturing a slender shaft type rotor forging, as shown in fig. 1 to 7, the method comprises the following steps:
in the step 1, the blanking mode that the water mouth end 2 of the steel ingot is directly pressed on the forging jaw after pre-drawing by the KD method can effectively control the cutting amount of the water mouth end 2 of the steel ingot, and because the water mouth end forging jaw is arranged below, water mouth end blanks with poor metallurgical quality can be prevented from being deformed or entering a forging body during upsetting and pressing, the purity of the forging blank body is ensured, and the ultrasonic flaw detection qualification rate of the forging can be effectively improved.
and 4, in the tempering and heat preservation stage of quenching and tempering heat treatment, adopting the technology of setting different tempering and heat preservation temperatures in different sections, setting the tempering and heat preservation temperature of the bell end at 610 +/-5 ℃ and the tempering and heat preservation temperature of the water gap end at 608 +/-5 ℃ based on the component difference of carbon and alloy elements in the water gap end and the bell end of the rotor within 0.02 wt% caused by the component segregation of the steel ingot 1, and adjusting the integral strength level of the rotor to be consistent.
Compared with the prior art, the homogeneous forging process of the slender shaft type rotor forging, provided by the invention, is a main deformation mode of 'KD pre-drawing length' + 'one-time upsetting and KD drawing length' forging, and can completely break an original cast structure of a steel ingot 1 through full wide anvil large deformation and reasonable matching of axial and radial forging ratios, namely that the upsetting ratio is more than or equal to 2, the total drawing length forging ratio is more than or equal to 5, and the total drawing length forging ratio is equal to KD pre-drawing length hot forging ratio, KD drawing length hot forging ratio and drawing finished product hot forging ratio, so that the compaction and welding of defects such as loose cores and shrinkage cavities of the steel ingot 1 are effectively ensured, and the uniformity of each part of the blank is ensured.
The method has the advantages that the blank is fully deformed in the early stage and is combined with the controlled forging of the finished product heat number, namely the finished product heat number forging ratio is larger than or equal to 1.4, the single anvil reduction rate is larger than or equal to 8%, the phenomenon of mixed crystals caused by the fact that the recrystallized structure cannot be obtained due to small deformation of the finished product heat number and small strain or no strain in the center of the forge piece can be effectively avoided, the uniformity of the structure and the grain size of each part of the forge piece is ensured, and a good foundation is laid for the subsequent heat treatment process and the reduction of the fluctuation of the mechanical properties of each part of the forge piece.
In step 4, as shown in fig. 7, when the rotor forging is quenched, tempered and tempered, the water-mouth end 2 of the steel ingot is arranged at the top end of the part above the ground, the cap end 3 of the steel ingot is arranged at the bottom end of the part below the ground 10, the part below the ground 10 is provided with a base 11, and the base 11 is used for supporting the furnace body 9 of the opening and closing furnace.
The KD pre-drawing length, the KD drawing length and the finished product drawing length correspond to three different forging times respectively, when forging is carried out on the first heat, during KD method pre-drawing length, a steel ingot is fixed between a V anvil 4 on the KD and a V anvil 5 under the KD, two ends of the steel ingot are a water gap end and a riser end respectively, when a blanking clamp handle 7 at the water gap end is used, a waste material 6 at the water gap end and a waste material 8 at the riser end are cut off, upsetting and KD drawing length are carried out during the second heat, and then drawing length of the third heat is carried out to obtain a finished product.
Different times of heating have different forging than the requirement in this application, specifically as follows:
in the step 1, the hot forging ratio during pre-drawing by a KD method is more than or equal to 1.5, the rolling reduction of each anvil during drawing is ensured to be more than or equal to 20%, and the length-diameter ratio and the diameter ratio of the blank before hot upsetting are controlled within a reasonable range, wherein the L/D is less than or equal to 2.5.
In the step 1, the reduction rate of each anvil in the pre-drawing by the KD method is more than or equal to 20 percent, and the reduction rate can ensure the effective compaction of the defects of loose cores and shrinkage cavities of the steel ingot 1.
In the step 1, the water mouth end 2 of the steel ingot is blanked and forged to form a jaw and the whole riser is cut off after pre-drawing by the KD method, the weight of the blanked part is more than or equal to 8% of the weight of the ingot body, and the length-to-diameter ratio L/D of the steel ingot 1 after blanking is less than or equal to 2.5.
In order to ensure that the cross section of the steel ingot 1 after upsetting meets the next-fire-number large-drawing-ratio drawing length, in the step 2, the steel ingot 1 is subjected to integral upsetting, the upsetting ratio is not less than 2, and then the cast structure of the steel ingot 1 is broken, so that the cross section of the steel ingot 1 after upsetting meets the next-fire-number large-drawing-ratio drawing length.
Similarly, in order to fully smash the original cast structure of the steel ingot 1 and ensure the effective compaction of the defects of loose cores and shrinkage cavities of the steel ingot 1, in the step 2, the forging ratio of the corresponding heat number is more than or equal to 3 when the KD method is drawn out, the forging ratio of the heat number is strictly controlled to be more than or equal to 3, the drawing-out of the multiple-pass 20% reduction rate can be met, and then the original cast structure of the steel ingot 1 is fully smashed and the effective compaction of the defects of loose cores and shrinkage cavities of the steel ingot 1 is ensured.
Similarly, in the step 2, the reduction rate of each anvil during KD-method drawing is more than or equal to 20%, and the effective compaction of the defects of loose cores and shrinkage cavities of the steel ingot 1 can be ensured by strictly controlling the reduction rate. In the step 2, the crack defects of the blank shaft body are thoroughly cleaned after the KD method is drawn out.
Compared with the prior art, the phase modifier rotor forging of the invention combines the main deformation process of 'KD method pre-drawing, steel ingot water mouth end 2 pressing jaw + upsetting, KD method drawing' with the forging controlling technology of the finished product producing process of the forging, the temperature controlling technology of quenching and tempering heat treatment and tempering subarea, obtains a qualified forging blank with pure body and uniform and compact tissues of each part, and the indexes of the rotor forging including ultrasonic wave detection and mechanical property fluctuation requirements and the like during final inspection all meet the standard requirements, namely the strength index fluctuation of each part of the rotor forging is less than 40MPA, and the rotor forging information part does not find the standard exceeding defect of phi 1.6mm equivalent weight, thus completely meeting the standard requirements of the forging.
Example 2
In this embodiment, a rotor forging of a 600MW phase modulator is used, the diameter of the shaft body of the rotor forging of the phase modulator is 1400mm, the total length is 15000mm, and the forging weight is 118t, and the forging method of the slender shaft rotor forging provided in embodiment 1 is used, and the method includes the following steps:
The shaft type opening and closing furnace for quenching and tempering heat treatment is divided into 14 temperature fields from top to bottom according to the characteristics of products to be produced, the length of each section of the opening and closing furnace is 1.3-1.4 m, when a rotor is charged, a water port end 2 (a rotor motor end) of a steel ingot is positioned at the underground part of the shaft type opening and closing furnace, corresponding to the 11 th to 14 th temperature fields, because the water port end 2 (the rotor motor end) of the steel ingot has the condition that carbon and alloy elements are low, the furnace temperature of the underground part in the tempering heat preservation stage is adjusted to be low, because the adjustment range needs to consider the characteristic that the heat atmosphere of the shaft type furnace floats upwards, and the base absorbs partial heat and other factors in the temperature raising process, the two conditions can cause the condition that the temperature field of the underground part is low in the tempering temperature raising and temperature equalizing processes, and therefore, the. In the process scheme, the furnace temperature of the 11 th to 14 th temperature fields of the underground part is set to be 2 ℃ lower than that of the 1 st to 10 th temperature fields of the overground part.
The phase modifier rotor forging is subjected to the main deformation process of 'KD method pre-drawing, steel ingot water mouth end 2 pressing jaw + upsetting and KD method drawing', the forging control technology of the finished product producing process of the forging and the tempering and tempering partitioned temperature control technology are combined, a qualified forging blank with a pure body and uniform and compact tissues of all parts is obtained, during final inspection, the fluctuation of the strength indexes of all parts of the rotor forging is less than 40MPA, the standard exceeding defect of phi 1.6mm equivalent is not found in the center of the rotor forging, and the standard requirement of the forging is completely met.
Comparative example 1
The embodiment is a manufacturing process of a slender shaft rotor forging without the technology, and the process comprises the following steps: pressing a jaw at the steel ingot riser end 3, cutting the waste material at the water riser end, upsetting and drawing out the steel ingot 1, forging a finished product, performing heat treatment after forging, and performing quenching and tempering heat treatment.
This comparative example provides such a manufacturing method having the following drawbacks compared to the manufacturing method of the present invention:
(1) the riser end presses the jaw, and the initial excision volume of mouth of a river end discarded material is little, and in the follow-up forging process, the mouth of a river end blank that the metallurgical quality is relatively poor participates in the deformation, and rotor body's purity is poor.
(2) Because the large steel ingot 1 is mostly a short thick steel ingot 1, when upsetting is directly performed, the upsetting ratio is small, deformation is insufficient, and the cast structure of the steel ingot 1 cannot be fully broken.
(3) The finished product is forged without considering control, the drawing ratio and the single anvil reduction ratio are small, the central strain of the forge piece is small, the forge piece is mixed with crystals, and the uniformity of the structure and the grain size of each part of the forge piece is poor.
(4) Tempering and tempering heat treatment do not adopt a zone temperature control technology, so that the consistency of the integral strength level of the rotor cannot be ensured, and the requirement of extremely strict volatility index during mechanical property inspection is difficult to meet.
Comparative example 2
The comparative example provides a forging method for directly pre-drawing a large steel ingot 1, which comprises the following steps: aiming at a 1000MW thermal power turbine low-pressure rotor forging, the maximum diameter of a finished forging is 2100mm, the forging weight is 168t, and the steel ingot weight is 290 t. The method adopts a direct pre-drawing forging process of the steel ingot 1 for forging, and the main forging method comprises the following steps: carrying out a direct preparation drawing process on the second steel ingot 1, drawing by adopting an FM method, and adopting four times of 0-180-90-180 turning reduction ratios of 13-15%; upsetting, wherein the upsetting ratio is 2, carrying out a second FM main drawing method, wherein the reduction per pass is more than 15%, and the drawing forging ratio is 2.5; and forging to obtain a finished product.
Compared with the forging method for directly pre-drawing and elongating the large steel ingot 1 in the prior art, the method has the main differences as follows:
(1) the invention adopts KD method to pre-draw and designs corresponding technological parameters; the pre-drawing and the drawing after upsetting adopt a KD method to avoid the risk that the center line of the forged piece is easy to deviate from the original center line of the steel ingot 1 when the FM method is used for drawing, the KD method is used for drawing the forged piece, the surface quality is good, and the forging crack and the folding damage are light.
(2) In the invention, the jaw for press forging is directly blanked at the water mouth end 2 of the steel ingot after pre-drawing; the direct blanking press jaw at the water gap end after pre-drawing can ensure the cutting amount of the water gap end 2 of the steel ingot, prevent the water gap end blank with poor metallurgical quality from participating in deformation or entering the forging body, and ensure the purity of the forging blank body.
(3) The drawing after upsetting adopts a KD method and designs corresponding process parameters.
(4) According to the invention, the controlled forging method is adopted for the heat number of the finished product, the forging ratio is more than or equal to 1.4, the single anvil reduction rate is more than or equal to 8%, and the controlled forging method for the heat number of the finished product can effectively avoid the mixed crystal phenomenon caused by the fact that the heat number deformation of the finished product is small and the recrystallized structure cannot be obtained due to small strain or no strain at the center of the forge piece in the traditional method, so that the uniformity of the structure and the grain size of each part of the forge piece is ensured.
(5) The tempering heat treatment of the invention adopts a partitioned temperature control technology; the tempering and tempering partitioned temperature control technology ensures that the integral strength level of the rotor is consistent so as to meet the requirement of extremely strict volatility index during mechanical property inspection.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. The manufacturing method of the slender shaft type rotor forging is characterized by comprising the following steps of:
step 1, performing KD-method pre-drawing and gate-end blanking pressing jaw treatment on a steel ingot during a first firing time;
step 2, carrying out upsetting and KD method drawing treatment on the steel ingot blank in the step 1 during the second heating;
step 3, during the third firing, the blank is drawn out to obtain a finished product for forging, the forging ratio of the drawing-out forging of the third firing is more than or equal to 1.4, and the reduction rate of each anvil is more than or equal to 8%;
and 4, tempering and heat preservation in the quenching and tempering heat treatment stage, wherein the tempering and heat preservation temperature at the riser end is 610 +/-5 ℃, the tempering and heat preservation temperature at the nozzle end is 608 +/-5 ℃, and the overall strength level of the rotor is adjusted to be consistent.
2. The method for manufacturing slender shaft type rotor forgings according to claim 1, wherein in the step 1, the first hot forging ratio during KD method pre-drawing is more than or equal to 1.5.
3. The method for manufacturing slender shaft type rotor forgings according to claim 2, wherein in the step 1, the reduction rate of each anvil in the pre-drawing by the KD method is more than or equal to 20%.
4. The method for manufacturing the slender shaft type rotor forging according to claim 3, wherein in the step 1, the steel ingot is pre-drawn by the KD method, a jaw is manufactured by blanking and press forging at the water gap end of the steel ingot, the whole riser is cut off, the weight of a blanking part is more than or equal to 8% of the weight of the ingot body, and the length-to-diameter ratio L/D of the steel ingot after blanking is less than or equal to 2.5.
5. The method for manufacturing slender shafts rotor forging according to claim 4, characterized in that, in step 2, the steel ingot is subjected to integral upsetting treatment, and the upsetting ratio is not less than 2.
6. The method for manufacturing slender shaft type rotor forgings according to claim 5, wherein in the step 2, the second-heat forging ratio during KD-method drawing is not less than 3.
7. The method for manufacturing slender shaft type rotor forgings according to claim 6, wherein in the step 2, the reduction rate per anvil during KD-method drawing is not less than 20%.
8. The method for manufacturing slender shaft type rotor forgings according to claim 7, wherein in the step 2, after the KD method is used for drawing, the crack defects of the blank shaft body need to be thoroughly cleaned.
9. The method for manufacturing the slender shaft type rotor forging according to claim 8, wherein the total draw ratio of the rotor forging is not less than 5, and the total draw ratio of the rotor forging is equal to the sum of the KD pre-draw forging ratio, the KD draw forging ratio and the finished product draw forging ratio.
10. The method for manufacturing the slender shaft type rotor forging according to claims 1 to 9, wherein in the step 4, a well opening and closing furnace is adopted for quenching and tempering heat treatment, the well opening and closing furnace is divided into 14 temperature fields from top to bottom, when the slender shaft type rotor forging is charged, a water gap end of a steel ingot is arranged in an underground part of the well opening and closing furnace, corresponding to the 11 th to 14 th temperature fields, and the furnace temperature of the 11 th to 14 th temperature fields of the underground part is set to be 2 ℃ lower than that of the first to 10 th temperature fields of the overground part.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116511407A (en) * | 2022-12-05 | 2023-08-01 | 天津重型装备工程研究有限公司 | Upsetting tool, large-section energy storage flywheel forging and forging method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1036348A (en) * | 1988-10-07 | 1989-10-18 | 北京重型机器厂 | Active compacting forging method |
| CN106180535A (en) * | 2016-07-08 | 2016-12-07 | 杭州汽轮铸锻有限公司 | A kind of free forging method improving rotor forging quality |
| CN108356193A (en) * | 2018-05-22 | 2018-08-03 | 通裕重工股份有限公司 | Rotor of steam turbo generator free forging method |
-
2019
- 2019-11-28 CN CN201911192884.4A patent/CN110899604B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1036348A (en) * | 1988-10-07 | 1989-10-18 | 北京重型机器厂 | Active compacting forging method |
| CN106180535A (en) * | 2016-07-08 | 2016-12-07 | 杭州汽轮铸锻有限公司 | A kind of free forging method improving rotor forging quality |
| CN108356193A (en) * | 2018-05-22 | 2018-08-03 | 通裕重工股份有限公司 | Rotor of steam turbo generator free forging method |
Non-Patent Citations (1)
| Title |
|---|
| 彭亚敏: "百万千瓦发电机转子的分区热处理", 《金属加工（热加工）》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116511407A (en) * | 2022-12-05 | 2023-08-01 | 天津重型装备工程研究有限公司 | Upsetting tool, large-section energy storage flywheel forging and forging method thereof |
| CN116511407B (en) * | 2022-12-05 | 2024-03-26 | 天津重型装备工程研究有限公司 | Upsetting tool, large-section energy storage flywheel forging and forging method thereof |
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| CN110899604B (en) | 2021-06-08 |
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