CN106424524A - Method for forging 17CrNiMo6 steel wind power generation gear - Google Patents
Method for forging 17CrNiMo6 steel wind power generation gear Download PDFInfo
- Publication number
- CN106424524A CN106424524A CN201610895798.XA CN201610895798A CN106424524A CN 106424524 A CN106424524 A CN 106424524A CN 201610895798 A CN201610895798 A CN 201610895798A CN 106424524 A CN106424524 A CN 106424524A
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- Prior art keywords
- forging
- forged
- blank
- gear
- wind
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Classifications
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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
- B21K1/28—Making machine elements wheels; discs
- B21K1/30—Making machine elements wheels; discs with gear-teeth
-
- 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
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
Abstract
The invention belongs to the wind power generation gear manufacturing technology, and relates to a method for forging a 17CrNiMo6 steel wind power generation gear. The method is characterized by comprising the steps of treatment before forging, wherein after the temperature of a heating furnace is raised, a forged piece blank is placed in the heating furnace to be heated and subjected to heat preservation; forging forming, wherein the forging temperature is 1240+/-10 DEG C-830+/-10 DEG C, the single-heating-number single-pass forging ratio ranges from 1.5 to 2, the last-pass forging ratio ranges from 1.8 to 2, the total forging ratio is larger than 4, and a blank gathering material is formed at the deformation rate being 0.1-1 s<-1>; and cooling after forging, wherein the gear is fast cooled to 650+/-10 DEG C after being forged for isothermal tempering, and furnace cooling is carried out after heat preservation to achieve the room temperature. A forged piece is heated before being forged, and the inner structure of the forged piece is more dispersed and uniform; the forging forming process parameters are controlled, and therefore the inner structure of the forged piece can form tiny equiaxial grains quite easily, and the comprehensive mechanical property of the forged piece is improved; and by means of the manner of cooling after forging, energy consumption is reduced, and meanwhile the stress of the inner structure of the forged piece is eliminated.
Description
Technical field
The invention belongs to wind-power electricity generation Gear Manufacturing Technology field, particularly to a kind of 17CrNiMo6 steel wind-power electricity generation tooth
The forging method of wheel.
Background technology
The development of human society is the non-renewable fossil of the extremely preciousness being formed before upper hundreds of millions year with the consumption earth in a large number
Resource is cost, so in energy field, seeking green clean energy resource becomes only way.Wind energy is inexhaustible, with no
Exhaust, and wind-power electricity generation is pollution-free, advantageous advantage makes it rapidly become the focus of clean energy resource research and development, wind-power electricity generation row
Industry is risen like the mushrooms after rain.Wind power industry premised on wind-power electricity generation equipment manufacture, because wind power plant is normal
It is operated in the unfrequented place such as Gobi desert, desert or even sea, undergo the effect of day and night temperature and alternating wind, to wind-force
Generating gear, the comprehensive mechanical property of gear shaft equipment are put forward higher requirement.
Domestic heavy-load gear steel substantially continues to use former Soviet Union's trade mark, in the period of the past is very long in, always 20CrMnTi
The situation ruling all the land, not only single varieties, and also steel product ingredient fluctuation is big, hardenability band, and field trash is many, causes gear thermal
Process deformation is big, the life-span is low.Go deep into further with research and develop to heavy-duty gear, the production domesticization of various pinion steels makes the tooth of China
Wheel molten steel is put down and is stepped on a new stage.At present, the SAE86 series of the Cr-Mn system steel of Germany, the Cr-Mo system steel of Japan and the U.S.
Steel has been achieved with domesticizing, and substantially meets the demand of domestic heavy-load gear steel, but wherein with 17CrNiMo6 steel as optimum
Selection because 17CrNiMo6 steel has the advantages that high intensity, high tenacity and high-hardenability.
17CrNiMo6 steel is mainly used in and transmits larger power and bear gear compared with big load, be widely used in mine,
The industrial circles such as transport, locomotive traction, lifting and wind-power electricity generation.Under normal circumstances, it is subjected to answer close to or up material is allowable
The working stress of force value, it is therefore desirable to material not only will have high bending fatigue strength and contact fatigue strength, also should have high
Anti-overload ability, puts forward higher requirement to forging technology.But this steel not yet includes GB although having been widely used, but
Many key propertys, particularly forging technology are often analogous to common heavy-duty gear and are processed by rule of thumb.Due to forging
Technological parameter formulates unreasonable so that wind-power electricity generation gear comprehensive mechanical property declines, thus significantly reducing wind-power electricity generation tooth
The service life of wheel.
Content of the invention
In order to formulate rational smithing technological parameter, improve inside wind-power electricity generation gear 17CrNiMo6 steel after hot-forging forming
Organizational structure, improves wind-power electricity generation gear comprehensive mechanical property it is ensured that the service life of wind-power electricity generation gear, the present invention provides one
Plant the forging method of wind-power electricity generation gear 17CrNiMo6 steel.
The present invention is achieved by the following technical programs.
A kind of 17CrNiMo6 steel wind-power electricity generation gear forging method is it is characterised in that carried out successively using following steps：
（1）, forging pre-treatment：After heating furnace is warming up to 1230 ~ 1250 DEG C, forging blank is placed in heating in heating furnace, according to hair
Base size is incubated 4 ~ 10h；
（2）, forging molding：
Blank after heating is put in the forging molding mould being made up of die, punch, cover die and ejecting mechanism, forging temperature
For 1240 ± 10 DEG C ~ 830 ± 10 DEG C, punch is pressed with die, and wherein Dan Huoci single pass forging ratio is 1.5 ~ 2, last a time
Forging ratio is 1.8 ~ 2, and total forging ratio is more than 4, with 0.1 ~ 1s-1Rate of deformation makes blank gather material molding along cover die inwall；Pressurize 5 ~ 10s
Afterwards, punch and die unload backhaul, eject the gear after forging molding through ejecting mechanism after the blank demoulding；
（3）, cooling after forged：It is cooled to 650 ± 10 DEG C of isothermal tempering 3 ~ 5h after Gears with Forging soon, after insulation, cool to room temperature with the furnace.
17CrNiMo6 steel wind-power electricity generation gear internal grain size number after forging molding is 5 ~ 7 grades.
The present invention compared with prior art has the advantages that.
1st, before present invention forging, forging is carried out reheating austenitizing process so that the crystal grain within forging is filled
Divide and grow up, after making the forged molding of forging, the more disperse of forging interior tissue is uniform.
2nd, the forging molding process parameter that the present invention provides, says so that forging is difficult forging process from macroscopic perspective
Cracking；Say from micro-pipe angle so that spherical austenite is easily formed, thus inhibit needle austenite nucleus formation so that
Forging interior tissue easily forms the shaft-like crystal grain such as tiny, improves the comprehensive mechanical property of forging.
3rd, the cooling after forged mode that the present invention provides, instead of in prior art and for forging to cool down rear 930 DEG C of normalizings+650
DEG C tempering Technology for Heating Processing, reduce energy resource consumption while, eliminate forging interior tissue stress.
Brief description
Fig. 1 is forging technology curve chart of the present invention.
Fig. 2 is the forging interior tissue shape appearance figure obtaining after embodiment one forges pre-treatment.
Fig. 3 be embodiment one forging molding during with rate of deformation as 0.1s-1, initial forging temperature be 1230 DEG C forging when forging
Part interior tissue shape appearance figure.
Fig. 4 be embodiment one forging molding during with rate of deformation as 0.1s-1, final forging temperature be 820 DEG C forging when forging
Part interior tissue shape appearance figure.
During Fig. 5 is embodiment one cooling after forged, with forging interior tissue shape appearance figure after 640 DEG C of isothermal temperings 3h.
Specific embodiment
Embodiment one
In the present embodiment, forging is 2m × Φ 1m cylinder 17CrNiMo6 steel ingot, and 17CrNiMo6 steel ingot is by Taiyuan Heavy Machinery
Company limited provides, and this steel is low carbon high alloy rustless steel, while having good mechanical property, has stronger corrosion-resistant
Characteristic, is to prepare the excellent raw material of wind-power electricity generation gear, but different from common low carbon high-alloy stainless steel forging process, forging
Easily produce featheriness or netted bainite in organization internal during making, reduce the comprehensive mechanical property of wind-power electricity generation gear
Energy.
As shown in Fig. 1 ~ 5, a kind of 17CrNiMo6 steel wind-power electricity generation gear forging method is it is characterised in that walked using following
Suddenly carry out successively：
（1）, forging pre-treatment：Forging blank is placed in heating furnace, heating furnace is warming up to 1230 DEG C of blanks and puts in heating furnace, root
It is incubated 4h according to blank dimension size, obtain forging interior tissue shape appearance figure as shown in Figure 2, the crystal grain under this state is called original
Crystal grain, the grain size number of original grain is 2 grades；
（2）, forging molding：
Blank after heating is put in the forging molding mould being made up of die, punch, cover die and ejecting mechanism, initial forging temperature
For 1230 DEG C, final forging temperature is 820 DEG C, and punch is pressed with die, and Dan Huoci single pass forging ratio is 1.5, and last a time is
1.8, total forging ratio is 4.1, with 0.1s-1Rate of deformation make blank along cover die inwall gather material molding；After pressurize 5s, punch and die
Unloading backhaul, ejects the gear after forging molding through ejecting mechanism after the blank demoulding.If Fig. 3 is 0.1s for rate of deformation-1, heating
Temperature is forging interior tissue shape appearance figure when 1230 DEG C, and in figure original grain is suitable with recrystallization crystal particle dimension, is obtained for and fills
That divides grows up.If Fig. 4 is 0.1s for rate of deformation-1, heating-up temperature be 820 DEG C when forging interior tissue shape appearance figure.
（3）, cooling after forged：It is cooled to 640 DEG C of isothermal temperings 3h soon, such as Fig. 5 is 640 DEG C of isothermal temperings of forging after forging
3h forging interior tissue shape appearance figure, cools to room temperature with the furnace after insulation, obtain the forged rear internal grain degree grade of forging after testing
For 5 grades, meet engineering use requirement.
Embodiment two
A kind of wind-power electricity generation gear is with 17CrNiMo6 steel forging method it is characterised in that being carried out successively using following steps：
（1）, forging pre-treatment：Forging blank is placed in heating furnace, heating furnace is warming up to 1240 DEG C of blanks and puts in heating furnace, root
It is incubated 6.5h according to blank dimension size；
（2）, forging molding：
Blank after heating is put in the forging molding mould being made up of die, punch, cover die and ejecting mechanism, initial forging temperature
For 1240 DEG C, final forging temperature is 830 DEG C, and punch is pressed with die, and Dan Huoci single pass forging ratio is 1.73, last a time forging ratio
For 1.87, with 0.5s-1Rate of deformation makes blank gather material molding along cover die inwall；After pressurize 7s, punch unloads backhaul, base with die
Eject the gear after forging molding through ejecting mechanism after the material demoulding；
（3）, cooling after forged：It is cooled to 650 DEG C of isothermal temperings 3.5h after forging soon, after insulation, cool to room temperature with the furnace.
The forged rear internal grain degree grade of described forging is 6 grades, meets engineering use requirement.
Embodiment three
A kind of wind-power electricity generation gear is with 17CrNiMo6 steel forging method it is characterised in that being carried out successively using following steps：
（1）, forging pre-treatment：Forging blank is placed in heating furnace, heating furnace is warming up to 1250 DEG C of blanks and puts in heating furnace, root
It is incubated 10h according to blank dimension size；
（2）, forging molding：
Blank after heating is put in the forging molding mould being made up of die, punch, cover die and ejecting mechanism, initial forging temperature
For 1250 DEG C, final forging temperature is 840 DEG C, and punch is pressed with die, and Dan Huoci single pass forging ratio is 2, and last a time is forging ratio
2, with 1s-1Rate of deformation makes blank gather material molding along cover die inwall；After pressurize 10s, punch unloads backhaul, the blank demoulding with die
Eject the gear after forging molding by ejecting mechanism；
（3）, cooling after forged：It is cooled to 660 DEG C of isothermal temperings 5h after forging soon, after insulation, cool to room temperature with the furnace.
The forged rear internal grain degree grade of described forging is 7 grades, meets engineering use requirement.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and any
Be familiar with those skilled in the art the invention discloses technical scope in, the change or replacement that can readily occur in, all should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by described scope of the claims.
Claims (2)
1. a kind of 17CrNiMo6 steel wind-power electricity generation gear forging method is it is characterised in that carried out successively using following steps：
（1）, forging pre-treatment：After heating furnace is warming up to 1230 ~ 1250 DEG C, forging blank is placed in heating in heating furnace, according to hair
Base size is incubated 4 ~ 10h；
（2）, forging molding：
Blank after heating is put in gear forming mould, forging temperature is 1240 ± 10 DEG C ~ 830 ± 10 DEG C, and Dan Huoci is mono-
Passage forging ratio is 1.5 ~ 2, and last a time forging ratio is 1.8 ~ 2, and total forging ratio is more than 4, with 0.1 ~ 1s-1Rate of deformation makes blank gather material
Molding；After pressurize 5 ~ 10s；
（3）, cooling after forged：It is cooled to 650 ± 10 DEG C of isothermal tempering 3 ~ 5h after Gears with Forging soon, after insulation, cool to room temperature with the furnace.
2. a kind of wind-power electricity generation gear according to claim 1 with 17CrNiMo6 steel forging method it is characterised in that：Forging
The 17CrNiMo6 steel wind-power electricity generation gear internal grain size number after type is caused to be 5 ~ 7 grades.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610895798.XA CN106424524B (en) | 2016-10-14 | 2016-10-14 | A kind of forging method of 17CrNiMo6 steel wind-power electricity generation gear |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610895798.XA CN106424524B (en) | 2016-10-14 | 2016-10-14 | A kind of forging method of 17CrNiMo6 steel wind-power electricity generation gear |
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| CN106424524A true CN106424524A (en) | 2017-02-22 |
| CN106424524B CN106424524B (en) | 2018-10-12 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110227778A (en) * | 2019-07-09 | 2019-09-13 | 中国航发哈尔滨东安发动机有限公司 | A kind of novel high-strength pinion steel forging method |
| CN111636033A (en) * | 2020-06-23 | 2020-09-08 | 张家港海锅新能源装备股份有限公司 | Production method of 18CrNiMo7-6 forging for wind power equipment gear |
| CN112620560A (en) * | 2020-12-02 | 2021-04-09 | 南京迪威尔高端制造股份有限公司 | 18CrNiMo7-6 gear forging and manufacturing method and detection method for overcoming subcutaneous defects of forging |
| CN113684354A (en) * | 2021-08-26 | 2021-11-23 | 重庆长征重工有限责任公司 | Method for improving banded structure of alloy structural steel 17CrNiMo6 forge piece |
| CN114210894A (en) * | 2021-12-27 | 2022-03-22 | 内蒙古北方重工业集团有限公司 | Forging temperature control method for 35CrNi3Mo die cast ingot precision forging machine |
| CN114293102A (en) * | 2021-12-31 | 2022-04-08 | 江阴振宏重型锻造有限公司 | Manufacturing method of 17CrNiMo6 forge piece |
| CN115044835A (en) * | 2022-07-29 | 2022-09-13 | 张家港海锅新能源装备股份有限公司 | Alloy steel for gear box forging and manufacturing method and application of forging |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1727502A (en) * | 2004-07-29 | 2006-02-01 | 山东泰山钢铁有限公司 | Method for forging Crl2MoV steel |
| CN102424934A (en) * | 2011-11-16 | 2012-04-25 | 东北特殊钢集团有限责任公司 | Manufacturing method of steel forged component of 18CrNiMo7-6 large gear |
| 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 |
| DE102011075697A1 (en) * | 2011-05-12 | 2012-11-15 | Robert Bosch Gmbh | Chromium-molybdenum alloy |
| CN103952646A (en) * | 2014-05-05 | 2014-07-30 | 莱芜钢铁集团有限公司 | Low-temperature resistant low-alloy structural steel and preparation method thereof |
-
2016
- 2016-10-14 CN CN201610895798.XA patent/CN106424524B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1727502A (en) * | 2004-07-29 | 2006-02-01 | 山东泰山钢铁有限公司 | Method for forging Crl2MoV steel |
| DE102011075697A1 (en) * | 2011-05-12 | 2012-11-15 | Robert Bosch Gmbh | Chromium-molybdenum alloy |
| CN102424934A (en) * | 2011-11-16 | 2012-04-25 | 东北特殊钢集团有限责任公司 | Manufacturing method of steel forged component of 18CrNiMo7-6 large gear |
| 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 |
| CN103952646A (en) * | 2014-05-05 | 2014-07-30 | 莱芜钢铁集团有限公司 | Low-temperature resistant low-alloy structural steel and preparation method thereof |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110227778A (en) * | 2019-07-09 | 2019-09-13 | 中国航发哈尔滨东安发动机有限公司 | A kind of novel high-strength pinion steel forging method |
| CN110227778B (en) * | 2019-07-09 | 2021-11-09 | 中国航发哈尔滨东安发动机有限公司 | High-strength gear steel forging method |
| CN111636033A (en) * | 2020-06-23 | 2020-09-08 | 张家港海锅新能源装备股份有限公司 | Production method of 18CrNiMo7-6 forging for wind power equipment gear |
| CN112620560A (en) * | 2020-12-02 | 2021-04-09 | 南京迪威尔高端制造股份有限公司 | 18CrNiMo7-6 gear forging and manufacturing method and detection method for overcoming subcutaneous defects of forging |
| CN113684354A (en) * | 2021-08-26 | 2021-11-23 | 重庆长征重工有限责任公司 | Method for improving banded structure of alloy structural steel 17CrNiMo6 forge piece |
| CN114210894A (en) * | 2021-12-27 | 2022-03-22 | 内蒙古北方重工业集团有限公司 | Forging temperature control method for 35CrNi3Mo die cast ingot precision forging machine |
| CN114293102A (en) * | 2021-12-31 | 2022-04-08 | 江阴振宏重型锻造有限公司 | Manufacturing method of 17CrNiMo6 forge piece |
| CN114293102B (en) * | 2021-12-31 | 2022-07-29 | 振宏重工(江苏)股份有限公司 | Manufacturing method of 17CrNiMo6 forge piece |
| CN115044835A (en) * | 2022-07-29 | 2022-09-13 | 张家港海锅新能源装备股份有限公司 | Alloy steel for gear box forging and manufacturing method and application of forging |
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| CN106424524B (en) | 2018-10-12 |
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