CN110038989A - A kind of hot forging process of wind power flange - Google Patents

A kind of hot forging process of wind power flange Download PDF

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Publication number
CN110038989A
CN110038989A CN201910261505.6A CN201910261505A CN110038989A CN 110038989 A CN110038989 A CN 110038989A CN 201910261505 A CN201910261505 A CN 201910261505A CN 110038989 A CN110038989 A CN 110038989A
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Prior art keywords
jumping
forging
wind power
continuous casting
rotation
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Pending
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CN201910261505.6A
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Chinese (zh)
Inventor
苏继伟
许燕燕
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CERI YINGKOU EQUIPMENT DEVELOPMENT AND MANUFACTURING Co Ltd
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CERI YINGKOU EQUIPMENT DEVELOPMENT AND MANUFACTURING Co Ltd
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Priority to CN201910261505.6A priority Critical patent/CN110038989A/en
Publication of CN110038989A publication Critical patent/CN110038989A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
    • B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/002—Hybrid process, e.g. forging following casting
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Forging (AREA)

Abstract

The invention discloses a kind of hot forging process of wind power flange, the technique are as follows: jumping-up is carried out after continuous casting billet is heated, hot forging process can be completed after punching, flat end face in the forging after jumping-up；The upsetting process are as follows: (1) by the direct jumping-up of continuous casting billet to height H1=H0/ (1.6~2.1), H1For the height after direct jumping-up, H0For the height before jumping-up；(2) forging after direct jumping-up is subjected to rotation jumping-up using the flat anvil of 500mm~700mm, rotation angle when into anvil is 90 °；(3) after rotation jumping-up to drafts is Δ H/2 ± 20mm, forging overturns 180 °, carries out rotation jumping-up using the flat anvil of 500mm~700mm again, until reaching finished product desired size；The Δ H is the overall reduction for rotating jumping-up.In this technique upsetting process, suffered power increases on unit area, expands entire section three-dimensional compressive stress range, can effectively promote the compactness and uniformity of forging tissue；The mechanical property of product can be effectively promoted, flaw detection qualification rate is promoted, the total quality for improving forging is horizontal.

Description

A kind of hot forging process of wind power flange
Technical field
The present invention relates to a kind of forging technology, especially a kind of hot forging process of wind power flange.
Background technique
Forging be it is a kind of using metal forming machinery to metal stock apply pressure, make its generate plastic deformation with obtain have one Determine the processing method of mechanical performance, certain shapes and size forging.It can eliminate what metal generated in smelting process by forging The defects of as cast condition is loose optimizes heterogeneous microstructure, simultaneously because saving complete metal streamline.
Wind energy is as a kind of clean renewable energy, and increasingly by the attention of every country, wind energy is to pass through air Flowing acting, contains huge energy, therefore, wind-power electricity generation is more and more concerned.Wind power flange is exactly to be used to connect tower Cylinder and wheel hub, the structural member between wheel hub and blade are one of important spare parts of Wind turbines.Since wind-power electricity generation will be subjected to Whether severe running environment, the quality such as high temperature, high and cold, high humility, dust storm and salt corrosion directly affect Wind turbines and may be used By operation, so having to follow strictly production technology in wind power flange reproduction process, guarantee the quality of wind power flange. With the swift and violent hair of wind-power electricity generation, demand of the market to wind power flange is also increasing, the service life of general wind power generating set It is 20 years, the quality of product is most important.
Currently, wind power flange mostly uses continuous casting billet to be hot-forged, and through rolling over loop forming.Hot forging carries out open die forging using press It makes, forging is produced using direct jumping-up mode, completes initial forging stock by punching.Such jumping-up mode is due to cannot effectively forge Loose and shrinkage cavity under alloying state, will lead to that wind power flange tissue is not fine and close, and there are non-uniform problems；Examining mechanical property When (tension test and impact test), easily in tissue weak part elder generation unstability, cause mechanical property relatively low, or even there are performances Not the problem of not conforming to.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of hot forging processes that can promote the wind power flange that defect forging is closed.
In order to solve the above technical problems, the technical solution used in the present invention is: carrying out jumping-up, upsetting after continuous casting billet is heated Hot forging process can be completed after punching, flat end face in forging after thick；
The upsetting process are as follows: (1) by the direct jumping-up of continuous casting billet to height H1=H0/ (1.6~2.1), H1After direct jumping-up Highly, H0For the height before jumping-up；
(2) forging after direct jumping-up is subjected to rotation jumping-up using the flat anvil of 500mm~700mm, rotation angle when into anvil It is 90 °；
(3) after rotation jumping-up to drafts is Δ H/2 ± 20mm, forging overturns 180 °, again using the flat of 500mm~700mm Anvil carries out rotation jumping-up, until reaching finished product desired size；The Δ H is the overall reduction for rotating jumping-up.
Upsetting process of the present invention uses the free forging press of 3150t~6000t.
Heating process of the present invention are as follows: continuous casting billet is first warming up to 700~800 DEG C, keeps the temperature 1.5~2h；It is warming up to again 1220~1250 DEG C, keep the temperature 4~5h.
The beneficial effects of adopting the technical scheme are that the present invention carries out being rotated into anvil jumping-up using flat anvil, There is a small upsetting process in each region, and the forging that can promote blank heart defect is closed, and is obviously improved flaw detection qualification rate；This hair In bright upsetting process, suffered power increases on unit area, expands entire section three-dimensional compressive stress range, can effectively mention Rise the compactness and uniformity of forging tissue.Using the present invention, the mechanical property of product can be effectively promoted, it is qualified to promote flaw detection Rate, the total quality for improving forging are horizontal.
Detailed description of the invention
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is the cloth anvil schematic diagram of present invention rotation jumping-up.
Specific embodiment
The hot forging process of this wind power flange is produced using continuous casting billet, including heating, jumping-up and punch process, each process Technique is as described below: (1) heat: continuous casting billet is first warming up to 700~800 DEG C with the speed of≤80 DEG C/h, keeps the temperature 1.5~2h；Again 1220~1250 DEG C are warming up to the speed of≤100 DEG C/h, keeps the temperature 4~5h.
(2) jumping-up: continuous casting billet after heating is excellent using the free forging press of 3150t~6000t in flat anvil or platform jumping-up First select 6000t press；Process are as follows:
A, continuous casting billet is stood on rotary table, direct jumping-up to height H1=H0/ 1.6~H0/ 2.1, H1After direct jumping-up Height, H0For the height before jumping-up；
B, rotation jumping-up is then carried out using 500mm~700mm flat anvil, cloth anvil mode is as shown in Figure 1, using anvil side is rotated into Formula, the rotation angle into anvil are 90 °；1-9 is pressure sequence in Fig. 1, and from 1 to 9 successively depresses, that is, completes a pressure passage, Each 100~150mm of drafts.
C, after the drafts that step B rotates jumping-up reaches Δ H/2 ± 20mm, forging overturns 180 °, i.e., above and below length direction Face exchanges；Rotation jumping-up is carried out using the flat anvil of 500mm~700mm again, cloth anvil mode as shown in Figure 1, into anvil rotation angle Degree is 90 °, each 100~150mm of drafts；Until reaching finished product desired size.Δ H=the H1-HEventually, wherein H1It is upper State the height in step A after direct jumping-up, HEventuallyHeight is required for finished product.
D, 90 ° of blank overturning after rotation jumping-up modify round as a ball, and upsetting process can be completed.
(3) blank after jumping-up is punched out using 350mm~450mm punching pin, flat end face, completes hot forging process.
Embodiment 1: the hot forging process of this wind power flange uses following concrete technologies.
(1) the wind power flange product that production material is S355NL, the chemical component of S355NL are shown in Table 1.Continuous casting billet diameter is 600mm, length (height) are 2016mm.
The chemical component (wt%) of table 1:S355NL
(2) continuous casting billet is first warming up to 750 DEG C with 80 DEG C/h of heating speed, keeps the temperature 1.5h；It is warming up to again with 90 DEG C/h of heating speed 1220 DEG C, keep the temperature 4h.
(3) the free forging press of 6000t is used.Firstly, the direct jumping-up of continuous casting billet is to 960mm.Then, using 700mm flat anvil Rotation jumping-up is carried out, each reduction in pass is respectively 120mm, 100mm, 100mm, jumping-up to 640mm；Forging stock is overturn 180 °, Again using 700mm flat anvil rotation jumping-up to finished product requirement height 320mm, each reduction in pass be respectively 110mm, 110mm, 100mm.Finally, blank overturns 90 °, modify round as a ball.
(4) punching of 450mm punching pin is used, the wind power flange product can be obtained in flat end face.
(5) wind power flange product obtained by the present embodiment, ultrasonic examination meet 1,998 4 grades of EN10228-3.
Embodiment 2: the hot forging process of this wind power flange uses following concrete technologies.
(1) the wind power flange product that production material is Q345E, the chemical component of Q345E are shown in Table 2.Continuous casting billet diameter is 600mm, length (height) are 1225mm.
The chemical component (wt%) of table 2:Q345E
(2) continuous casting billet is first warming up to 800 DEG C with 75 DEG C/h of heating speed, keeps the temperature 1.5h；It is warming up to again with 100 DEG C/h of heating speed 1230 DEG C, keep the temperature 5h.
(3) the free forging press of 6000t is used.Firstly, the direct jumping-up of continuous casting billet is to 765mm.Then, using 500mm flat anvil Rotation jumping-up is carried out, each reduction in pass is respectively 100mm, 100mm, jumping-up to 565mm；Forging stock is overturn 180 °, is adopted again Jumping-up is rotated with 500mm flat anvil and requires height 365mm to finished product, and each reduction in pass is respectively 100mm, 100mm.Finally, base 90 ° of material overturning, modify round as a ball.
(4) punching of 400mm punching pin is used, the wind power flange product can be obtained in flat end face.
(5) wind power flange product obtained by the present embodiment, ultrasonic examination meet 1,998 4 grades of EN10228-3.
Embodiment 3: the hot forging process of this wind power flange uses following concrete technologies.
(1) the wind power flange product that production material is Q345E, the chemical component of Q345E are shown in Table 2.Continuous casting billet diameter is 600mm, length (height) are 1500mm.
The chemical component (wt%) of table 3:Q345E
(2) continuous casting billet is first warming up to 780 DEG C with 75 DEG C/h of heating speed, keeps the temperature 2h；It is warming up to again with 100 DEG C/h of heating speed 1250 DEG C, keep the temperature 4.5h.
(3) the free forging press of 6000t is used.Firstly, the direct jumping-up of continuous casting billet is to 830mm.Then, using 600mm flat anvil Rotation jumping-up is carried out, each reduction in pass is respectively 145mm, 100mm, jumping-up to 585mm；Forging stock is overturn 180 °, is adopted again Jumping-up is rotated with 600mm flat anvil and requires height 340mm to finished product, and each reduction in pass is respectively 120mm, 125mm.Finally, base 90 ° of material overturning, modify round as a ball.
(4) punching of 350mm punching pin is used, the wind power flange product can be obtained in flat end face.
(5) wind power flange product obtained by the present embodiment, ultrasonic examination meet 1,998 4 grades of EN10228-3.
Embodiment 4: the hot forging process of this wind power flange uses following concrete technologies.
(1) the wind power flange product that production material is Q345D.Continuous casting billet diameter is 600mm, and length (height) is 1860mm。
The chemical component (wt%) of table 4:Q345D
(2) continuous casting billet is first warming up to 720 DEG C with 70 DEG C/h of heating speed, keeps the temperature 1.8h；It is warming up to again with 95 DEG C/h of heating speed 1240 DEG C, keep the temperature 4.5h.
(3) the free forging press of 3150t is used.Firstly, the direct jumping-up of continuous casting billet is to 930mm.Then, using 600mm flat anvil Rotation jumping-up is carried out, each reduction in pass is respectively 110mm, 100mm, 100mm, jumping-up to 620mm；Forging stock is overturn 180 °, Jumping-up is rotated using 600mm flat anvil again and requires height 350mm to finished product, each reduction in pass is respectively 150mm, 120mm.Most Afterwards, blank overturns 90 °, modify round as a ball.
(4) punching of 400mm punching pin is used, the wind power flange product can be obtained in flat end face.
(5) wind power flange product obtained by the present embodiment, ultrasonic examination meet 1,998 4 grades of EN10228-3.
Embodiment 5: the hot forging process of this wind power flange uses following concrete technologies.
(1) the wind power flange product that production material is S355NL-Z25.Continuous casting billet diameter is 600mm, and length (height) is 1788mm。
The chemical component (wt%) of table 5:S355NL-Z25
(2) continuous casting billet is first warming up to 700 DEG C with 72 DEG C/h of heating speed, keeps the temperature 1.6h；It is warming up to again with 92 DEG C/h of heating speed 1235 DEG C, keep the temperature 5h.
(3) the free forging press of 5000t is used.Firstly, the direct jumping-up of continuous casting billet is to 966mm.Then, using 700mm flat anvil Rotation jumping-up is carried out, each reduction in pass is respectively 150mm, 148mm, jumping-up to 668mm；Forging stock is overturn 180 °, is adopted again Jumping-up is rotated with 700mm flat anvil and requires height 330mm to finished product, and each reduction in pass is respectively 110mm, 110mm, 118mm.Most Afterwards, blank overturns 90 °, modify round as a ball.
(4) punching of 450mm punching pin is used, the wind power flange product can be obtained in flat end face.
(5) wind power flange product obtained by the present embodiment, ultrasonic examination meet 1,998 4 grades of EN10228-3.
Statistics case: randomly selecting 100 batch of wind power flange product forged using conventional method, through ultrasonic examination, 20 batches are unqualified, qualification rate 80%；100 batch of wind power flange product using the forging of this technique is randomly selected, through ultrasonic wave Flaw detection, 3 batches are unqualified, qualification rate 97%.It can be seen that this technique effectively eliminates the loose and shrinkage cavity of product, spy is improved Hurt qualification rate.

Claims (3)

1. a kind of hot forging process of wind power flange, it is characterised in that: carry out jumping-up after continuous casting billet is heated, the forging warp after jumping-up After punching, flat end face, hot forging process can be completed；
The upsetting process are as follows: (1) by the direct jumping-up of continuous casting billet to height H1=H0/ (1.6~2.1), H1After direct jumping-up Highly, H0For the height before jumping-up；
(2) forging after direct jumping-up is subjected to rotation jumping-up using the flat anvil of 500mm~700mm, rotation angle when into anvil It is 90 °；
(3) after rotation jumping-up to drafts is Δ H/2 ± 20mm, forging overturns 180 °；Again using the flat of 500mm~700mm Anvil carries out rotation jumping-up, until reaching finished product desired size；The Δ H is the overall reduction for rotating jumping-up.
2. a kind of hot forging process of wind power flange according to claim 1, it is characterised in that: the upsetting process uses The free forging press of 3150t~6000t.
3. a kind of hot forging process of wind power flange according to claim 1 or 2, which is characterized in that the heating process are as follows: Continuous casting billet is first warming up to 700~800 DEG C, keeps the temperature 1.5~2h；It is warming up to 1220~1250 DEG C again, keeps the temperature 4~5h.
CN201910261505.6A 2019-04-02 2019-04-02 A kind of hot forging process of wind power flange Pending CN110038989A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111618220A (en) * 2020-07-03 2020-09-04 无锡宏达重工股份有限公司 Forging method of large cake forging with diameter-height ratio larger than 10

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01181938A (en) * 1988-01-12 1989-07-19 Ishikawajima Harima Heavy Ind Co Ltd Ring rolling device
CN102513799A (en) * 2012-01-06 2012-06-27 山东伊莱特重工有限公司 Ring rolling method for flange of megawatt wind generation set tower
CN102699637A (en) * 2012-06-26 2012-10-03 江苏金源锻造股份有限公司 Process for forging main shaft flange of wind driven generator
CN102717237A (en) * 2012-06-28 2012-10-10 江苏金源锻造股份有限公司 Method for forming wind power flange
CN102728756A (en) * 2012-06-27 2012-10-17 江苏金源锻造股份有限公司 Wind power spindle flange upsetting process
CN109226617A (en) * 2018-08-24 2019-01-18 江阴南工锻造有限公司 A kind of high-power wind turbine main shaft large flange quick shaping process

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01181938A (en) * 1988-01-12 1989-07-19 Ishikawajima Harima Heavy Ind Co Ltd Ring rolling device
CN102513799A (en) * 2012-01-06 2012-06-27 山东伊莱特重工有限公司 Ring rolling method for flange of megawatt wind generation set tower
CN102699637A (en) * 2012-06-26 2012-10-03 江苏金源锻造股份有限公司 Process for forging main shaft flange of wind driven generator
CN102728756A (en) * 2012-06-27 2012-10-17 江苏金源锻造股份有限公司 Wind power spindle flange upsetting process
CN102717237A (en) * 2012-06-28 2012-10-10 江苏金源锻造股份有限公司 Method for forming wind power flange
CN109226617A (en) * 2018-08-24 2019-01-18 江阴南工锻造有限公司 A kind of high-power wind turbine main shaft large flange quick shaping process

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111618220A (en) * 2020-07-03 2020-09-04 无锡宏达重工股份有限公司 Forging method of large cake forging with diameter-height ratio larger than 10
CN111618220B (en) * 2020-07-03 2022-09-27 无锡宏达重工股份有限公司 Forging method of large cake forging with diameter-height ratio larger than 10

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Application publication date: 20190723