CN108856609A - A kind of heavy wall 718Plus alloy annular forging milling method - Google Patents

A kind of heavy wall 718Plus alloy annular forging milling method Download PDF

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Publication number
CN108856609A
CN108856609A CN201810749263.0A CN201810749263A CN108856609A CN 108856609 A CN108856609 A CN 108856609A CN 201810749263 A CN201810749263 A CN 201810749263A CN 108856609 A CN108856609 A CN 108856609A
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CN
China
Prior art keywords
blank
bar
preserving agent
rolling
ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810749263.0A
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Chinese (zh)
Inventor
刘智
刘峰
李姚君
刘其源
王俊
陈翠
吴久喜
何方有
许亮
何涛
连忠礼
许志成
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Wuxi Parker New Materials Polytron Technologies Inc
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Wuxi Parker New Materials Polytron Technologies Inc
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Priority to CN201810749263.0A priority Critical patent/CN108856609A/en
Publication of CN108856609A publication Critical patent/CN108856609A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21HMAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H1/00Making articles shaped as bodies of revolution
    • B21H1/06Making articles shaped as bodies of revolution rings of restricted axial length
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/08Upsetting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/10Piercing billets
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21KMAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K29/00Arrangements for heating or cooling during processing

Abstract

The present invention relates to a kind of heavy wall 718Plus alloy annular forging milling method, specific embodiment includes:Smear heat preserving agent, heating, base, blank isothermal holding, blank heating and ring rolling, in above-mentioned steps, by the amount of feeding, rolling time and the deflection etc. that optimize blank, the final deformation velocity of mill speed and ring is controlled, improve ring cracking and crystal grain problem bigger than normal in forging process, the mechanical property of ring after ring is rolled with raising;Using the problem of package heat-preservation cotton is kept the temperature blank, effective can prevent forging from being led to cracking due to fast cooling in subsequent process forging process outside blank in blank isothermal holding.

Description

A kind of heavy wall 718Plus alloy annular forging milling method
Technical field
The present invention relates to high-temperature alloy forging technology field, especially a kind of heavy wall 718Plus alloy annular forging rolling Method.
Background technique
718Plus alloy is a kind of novel nickel base superalloy, has splendid high-temperature behavior and high-temperature stability, is navigating It is widely used in empty engine, but due to its complicated component, alloying level is high, therefore exist in forging each Kind is difficult, causes stock utilization low, the high problem of product rejection rate, especially heavy wall annular 718Plus forging, due to its knot The problems such as structure reason, there are forging crack, crystallite dimension are bigger than normal, and performance is not able to satisfy requirement in production process, using biography System manufacturing process has been unable to meet the batch production requirements of 718Plus alloy annular forging.
Summary of the invention
The applicant provides a kind of heavy wall 718Plus alloy annular forging for the disadvantage in above-mentioned existing production technology Milling method, by improving process conditions, mill speed and ring by the way of jacket heat preservation while during controlled rolling Final deformation velocity, prevent during the rolling process fast cooling lead to that crystallite dimension is bigger than normal and crystal grain is uneven and ring cracking The problems such as.
The technical solution adopted in the present invention is as follows:
A kind of heavy wall 718Plus alloy annular forging milling method, specific process step are as follows:
Step 1:Smear heat preserving agent:718Plus alloy bar is placed in heat preservation 30min in 100 DEG C -200 DEG C of electric furnace to go out Furnace, uniformly smears heat preserving agent in billet surface, so that heat preserving agent is freezed solidly on billet surface using bar own temperature, dry to bar Afterwards, it repeats to smear heat preserving agent twice;
Step 2:Heating:The bar handled well in step 1 is placed in 1060 DEG C of electric furnace and heats T minutes, wherein T= Bar outer diameter × 0.8, the unit of the bar outer diameter are mm;
Step 3:Base:The bar heated in step 2 is subjected to jumping-up in quick forging machine, make its deflection >= 50%, the bar height after jumping-up guarantee be the ring reserved 10% of subsequent roll forming deflection, punching after jumping-up is made Circular material blank with holes;
Step 4:Blank isothermal holding:The circular material blank with holes processed in step 3 is placed in 100 DEG C -200 DEG C of electricity It comes out of the stove after keeping the temperature 30min in furnace, uniformly smears heat preserving agent in blank surface, so that heat preserving agent is freezed solidly on it using blank own temperature Glass binder is smeared after blank is dry in surface, when glass binder is moisture state, wraps up the whole of blank with heat-preservation cotton A outer surface;
Step 5:Blank heating:The blank that step 4 is handled well, which is placed in 1060 DEG C of electric furnace, heats T minutes, wherein T =sotck thinkness × 1.0, the sotck thinkness are the wall degree of circular material blank with holes, unit mm;
Step 6:Ring rolling:The blank heated in step 5 is rolled after taking out in heating furnace, wherein when shifting Between≤10s, the amount of feeding is 0.10-0.15mm/s when rolling, and repeat-rolling is multiple, and total rolling time≤60s rolls for the last time The deflection of system with it is preceding it is primary compared with >=30%.
Its further technical solution is:
In the step 2, furnace temperature is set as 180 DEG C.
In the step 4, furnace temperature is set as 180 DEG C.
In the step 6, total rolling time is 50s.
Beneficial effects of the present invention are as follows:
The present invention passes through the process conditions during optimization ring rolling:By the amount of feeding, the rolling time that optimize blank With deflection etc., the final deformation velocity of mill speed and ring is controlled, improves in forging process ring cracking and brilliant Grain problem bigger than normal, the mechanical property of ring after ring is rolled with raising;It is used in blank isothermal holding and wraps up heat preservation outside blank Cotton keeps the temperature blank, effective can prevent forging from leading to rolling crack due to fast cooling in subsequent forging process.
Specific embodiment
Illustrate a specific embodiment of the invention below.
The heavy wall 718Plus alloy annular forging milling method of the present embodiment, specific process step are as follows:
Step 1:Smear heat preserving agent:718Plus alloy bar is placed in heat preservation 30min in 100 DEG C -200 DEG C of electric furnace to go out Furnace, uniformly smears heat preserving agent in billet surface, so that heat preserving agent is freezed solidly on billet surface using bar own temperature, dry to bar Afterwards, it repeats to smear heat preserving agent twice;
Step 2:Heating:The bar handled well in step 1 is placed in 1060 DEG C of electric furnace and heats T minutes, wherein T= Bar outer diameter × 0.8, the unit of bar outer diameter are mm;
Step 3:Base:The bar heated in step 2 is subjected to jumping-up in quick forging machine, make its deflection >= 50%, the bar height after jumping-up guarantee be the ring reserved 10% of subsequent roll forming deflection, punching after jumping-up is made Circular material blank with holes;
Step 4:Blank isothermal holding:The circular material blank with holes processed in step 3 is placed in 100 DEG C -200 DEG C of electricity It comes out of the stove after keeping the temperature 30min in furnace, uniformly smears heat preserving agent in blank surface, so that heat preserving agent is freezed solidly on it using blank own temperature Glass binder is smeared after blank is dry in surface, when glass binder is moisture state, wraps up the whole of blank with heat-preservation cotton A outer surface;
Step 5:Blank heating:The blank that step 4 is handled well, which is placed in 1060 DEG C of electric furnace, heats T minutes, wherein T =sotck thinkness × 1.0, sotck thinkness are the wall degree of circular material blank with holes, unit mm;
Step 6:Ring rolling:The blank heated in step 5 is rolled after taking out in heating furnace, wherein when shifting Between≤10s, the amount of feeding is 0.10-0.15mm/s when rolling, and repeat-rolling is multiple, and total rolling time≤60s rolls for the last time The deflection of system with it is preceding it is primary compared with >=30%.
In step 2, furnace temperature is set as 180 DEG C.
In step 4, furnace temperature is set as 180 DEG C.
In step 6, total rolling time is 50s.
Embodiment one:
The heavy wall 718Plus alloy annular forging milling method of the present embodiment, specific process step are as follows:
Step 1:Smear heat preserving agent:718Plus alloy bar is placed in heat preservation 30min in 180 DEG C of electric furnace to come out of the stove, Billet surface uniformly smears heat preserving agent, so that heat preserving agent is freezed solidly on billet surface using bar own temperature, after bar is dry, weight Heat preserving agent twice is smeared in overcoating;
Step 2:Heating:The bar handled well in step 1 is placed in 1060 DEG C of electric furnace and heats T minutes, wherein T= Bar outer diameter × 0.8, the unit of bar outer diameter are mm;
Step 3:Base:The bar heated in step 2 is subjected to jumping-up in quick forging machine, make its deflection >= 50%, the bar height after jumping-up guarantee be the ring reserved 10% of subsequent roll forming deflection, punching after jumping-up is made Circular material blank with holes;
Step 4:Blank isothermal holding:The circular material blank with holes processed in step 3 is placed in 180 DEG C of electric furnace and is protected It comes out of the stove after warm 30min, uniformly smears heat preserving agent in blank surface, so that heat preserving agent is freezed solidly on its surface using blank own temperature, Glass binder is smeared after blank is dry, when glass binder is moisture state, wraps up the entire outer of blank with heat-preservation cotton Surface;
Step 5:Blank heating:The blank that step 4 is handled well, which is placed in 1060 DEG C of electric furnace, heats T minutes, wherein T =sotck thinkness × 1.0, sotck thinkness are the wall degree of circular material blank with holes, unit mm;
Step 6:Ring rolling:The blank heated in step 5 is rolled after taking out in heating furnace, wherein when shifting Between≤10s, the amount of feeding is 0.10-0.15mm/s when rolling, and repeat-rolling is multiple, and total rolling time is 50s, is rolled for the last time The deflection of system with it is preceding it is primary compared with >=30%.
Embodiment two:
The heavy wall 718Plus alloy annular forging milling method of the present embodiment, specific process step are as follows:
Step 1:Smear heat preserving agent:718Plus alloy bar is placed in heat preservation 30min in 200 DEG C of electric furnace to come out of the stove, Billet surface uniformly smears heat preserving agent, so that heat preserving agent is freezed solidly on billet surface using bar own temperature, after bar is dry, weight Heat preserving agent twice is smeared in overcoating;
Step 2:Heating:The bar handled well in step 1 is placed in 1060 DEG C of electric furnace and heats T minutes, wherein T= Bar outer diameter × 0.8, the unit of bar outer diameter are mm;
Step 3:Base:The bar heated in step 2 is subjected to jumping-up in quick forging machine, make its deflection >= 50%, the bar height after jumping-up guarantee be the ring reserved 10% of subsequent roll forming deflection, punching after jumping-up is made Circular material blank with holes;
Step 4:Blank isothermal holding:The circular material blank with holes processed in step 3 is placed in 200 DEG C of electric furnace and is protected It comes out of the stove after warm 30min, uniformly smears heat preserving agent in blank surface, so that heat preserving agent is freezed solidly on its surface using blank own temperature, Glass binder is smeared after blank is dry, when glass binder is moisture state, wraps up the entire outer of blank with heat-preservation cotton Surface;
Step 5:Blank heating:The blank that step 4 is handled well, which is placed in 1060 DEG C of electric furnace, heats T minutes, wherein T =sotck thinkness × 1.0, sotck thinkness are the wall degree of circular material blank with holes, unit mm;
Step 6:Ring rolling:The blank heated in step 5 is rolled after taking out in heating furnace, wherein when shifting Between≤10s, the amount of feeding is 0.10-0.15mm/s when rolling, and repeat-rolling is multiple, and total rolling time is 45s, is rolled for the last time The deflection of system with it is preceding it is primary compared with >=30%.
Embodiment three:
The heavy wall 718Plus alloy annular forging milling method of the present embodiment, specific process step are as follows:
Step 1:Smear heat preserving agent:718Plus alloy bar is placed in heat preservation 30min in 100 DEG C of electric furnace to come out of the stove, Billet surface uniformly smears heat preserving agent, so that heat preserving agent is freezed solidly on billet surface using bar own temperature, after bar is dry, weight Heat preserving agent twice is smeared in overcoating;
Step 2:Heating:The bar handled well in step 1 is placed in 1060 DEG C of electric furnace and heats T minutes, wherein T= Bar outer diameter × 0.8, the unit of bar outer diameter are mm;
Step 3:Base:The bar heated in step 2 is subjected to jumping-up in quick forging machine, make its deflection >= 50%, the bar height after jumping-up guarantee be the ring reserved 10% of subsequent roll forming deflection, punching after jumping-up is made Circular material blank with holes;
Step 4:Blank isothermal holding:The circular material blank with holes processed in step 3 is placed in 100 DEG C of electric furnace and is protected It comes out of the stove after warm 30min, uniformly smears heat preserving agent in blank surface, so that heat preserving agent is freezed solidly on its surface using blank own temperature, Glass binder is smeared after blank is dry, when glass binder is moisture state, wraps up the entire outer of blank with heat-preservation cotton Surface;
Step 5:Blank heating:The blank that step 4 is handled well, which is placed in 1060 DEG C of electric furnace, heats T minutes, wherein T =sotck thinkness × 1.0, sotck thinkness are the wall degree of circular material blank with holes, unit mm;
Step 6:Ring rolling:The blank heated in step 5 is rolled after taking out in heating furnace, wherein when shifting Between≤10s, the amount of feeding is 0.10-0.15mm/s when rolling, and repeat-rolling is multiple, and total rolling time is 60s, is rolled for the last time The deflection of system with it is preceding it is primary compared with >=30%.
Using in above-mentioned processing step, by optimizing the amount of feeding, rolling time and the deflection of blank, to mill speed and The final deformation velocity of ring is controlled, and is improved ring cracking and crystal grain problem bigger than normal in forging process, is rolled ring to improve The mechanical property of ring afterwards;The package heat-preservation cotton outside blank is used to keep the temperature blank in blank isothermal holding, it can be effective Fruit prevents forging from leading to rolling crack due to fast cooling in subsequent forging process.
Above description is explanation of the invention, is not intended to limit the invention, and limited range of the present invention is referring to right It is required that within protection scope of the present invention, any type of modification can be made.

Claims (4)

1. a kind of heavy wall 718Plus alloy annular forging milling method, it is characterised in that:Its specific process step is as follows:
Step 1:Smear heat preserving agent:718Plus alloy bar is placed in heat preservation 30min in 100 DEG C -200 DEG C of electric furnace to come out of the stove, Heat preserving agent is uniformly smeared in billet surface, so that heat preserving agent is freezed solidly on billet surface using bar own temperature, after bar is dry, It repeats to smear heat preserving agent twice;
Step 2:Heating:The bar handled well in step 1 is placed in 1060 DEG C of electric furnace and heats T minutes, wherein T=bar Outer diameter × 0.8, the unit of the bar outer diameter are mm;
Step 3:Base:The bar heated in step 2 is subjected to jumping-up in quick forging machine, makes its deflection >=50%, upsetting Bar height after thick guarantees to be that the ring of subsequent roll forming reserves 10% deflection, and band orifice ring is made in punching after jumping-up Shape blank;
Step 4:Blank isothermal holding:The circular material blank with holes processed in step 3 is placed in 100 DEG C -200 DEG C of electric furnace It comes out of the stove after heat preservation 30min, uniformly smears heat preserving agent in blank surface, so that heat preserving agent is freezed solidly on its table using blank own temperature Glass binder is smeared after blank is dry in face, when glass binder is moisture state, wraps up the entire of blank with heat-preservation cotton Outer surface;
Step 5:Blank heating:The blank that step 4 is handled well, which is placed in 1060 DEG C of electric furnace, heats T minutes, wherein T=base Expect thickness × 1.0, the sotck thinkness is the wall degree of circular material blank with holes, unit mm;
Step 6:Ring rolling:By the blank heated in step 5 from heating furnace take out after roll, wherein transfer time≤ 10s, the amount of feeding is 0.10-0.15mm/s when rolling, and repeat-rolling is multiple, total rolling time≤60s, last time rolling Deflection with it is preceding it is primary compared with >=30%.
2. a kind of heavy wall 718Plus alloy annular forging milling method as described in claim 1, it is characterised in that:The step In rapid two, furnace temperature is set as 180 DEG C.
3. a kind of heavy wall 718Plus alloy annular forging milling method as described in claim 1, it is characterised in that:The step In rapid four, furnace temperature is set as 180 DEG C.
4. a kind of heavy wall 718Plus alloy annular forging milling method as described in claim 1, it is characterised in that:The step In rapid six, total rolling time is 50s.
CN201810749263.0A 2018-07-10 2018-07-10 A kind of heavy wall 718Plus alloy annular forging milling method Pending CN108856609A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810749263.0A CN108856609A (en) 2018-07-10 2018-07-10 A kind of heavy wall 718Plus alloy annular forging milling method

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Application Number Priority Date Filing Date Title
CN201810749263.0A CN108856609A (en) 2018-07-10 2018-07-10 A kind of heavy wall 718Plus alloy annular forging milling method

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CN108856609A true CN108856609A (en) 2018-11-23

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001129635A (en) * 1999-11-02 2001-05-15 Nsk Warner Kk Method of manufacturing deformed ring
CN105397004A (en) * 2015-12-02 2016-03-16 贵州安大航空锻造有限责任公司 Forming method of large GH4169 alloy die forging
CN105921651A (en) * 2016-06-28 2016-09-07 中国南方航空工业(集团)有限公司 Rolling method of high-temperature alloy high cylinder thin-walled ring part
CN106363352A (en) * 2016-08-31 2017-02-01 无锡派克新材料科技股份有限公司 Manufacturing process of high-strength aluminum alloy ring forge

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001129635A (en) * 1999-11-02 2001-05-15 Nsk Warner Kk Method of manufacturing deformed ring
CN105397004A (en) * 2015-12-02 2016-03-16 贵州安大航空锻造有限责任公司 Forming method of large GH4169 alloy die forging
CN105921651A (en) * 2016-06-28 2016-09-07 中国南方航空工业(集团)有限公司 Rolling method of high-temperature alloy high cylinder thin-walled ring part
CN106363352A (en) * 2016-08-31 2017-02-01 无锡派克新材料科技股份有限公司 Manufacturing process of high-strength aluminum alloy ring forge

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Application publication date: 20181123

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