CN106623704A - Manufacturing method of low stress 2A70 aluminum alloy ring piece - Google Patents

Manufacturing method of low stress 2A70 aluminum alloy ring piece Download PDF

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Publication number
CN106623704A
CN106623704A CN201611092426.XA CN201611092426A CN106623704A CN 106623704 A CN106623704 A CN 106623704A CN 201611092426 A CN201611092426 A CN 201611092426A CN 106623704 A CN106623704 A CN 106623704A
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CN
China
Prior art keywords
2a70
core roller
rolled
feed speed
temperature
Prior art date
Application number
CN201611092426.XA
Other languages
Chinese (zh)
Inventor
徐东
葛波
苏春民
李兴品
李玉凤
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贵州安大航空锻造有限责任公司
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Priority to CN201611092426.XA priority Critical patent/CN106623704A/en
Publication of CN106623704A publication Critical patent/CN106623704A/en

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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
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/057Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent

Abstract

The invention discloses a manufacturing method of a low stress 2A70 aluminum alloy ring piece. The manufacturing method includes the steps that firstly, a 2A70 aluminum alloy rod material is subjected to upsetting and punching after being heated and subjected to heat preservation, the ring piece is manufactured by means of pre-rolling and final rolling, and is subjected to solid solution treatment, aqueous media with the temperature larger than or equal to 85 DEG C are adopted during solid solution cooling, cold bulging is performed after solid solution, the bulging amount is 1.8% to 2.2%, aging treatment is performed after bulging, and therefore the low stress 2A70 aluminum alloy ring piece is obtained. By means of the method, the residual stress of the 2A70 aluminum alloy ring piece can be effectively eliminated, and the performance of forged pieces is improved. The method is used for manufacturing the low stress 2A70 aluminum alloy ring piece.

Description

Low stress 2A70 aluminium alloy rings manufacture methods

Technical field

The present invention relates to a kind of manufacture method of annular element, more particularly to low stress 2A70 aluminium alloy rings manufacturers Method.

Background technology

2A70 aluminium alloy rings are mainly applied to the class important spare part of aero-engine casing one, in actual applications Jing Often there is the deformation of machine added-time, dimensional stability extreme difference, it is blank internal residual stress to cause part machine to add the key factor of deformation Too high, reducing the internal residual stress of blank ring can effectively alleviate during part machine adds because residual stress release is caused Deformation.At present residual stress is generally removed by following methods or is adjusted:1. de-stress is gone by heat effect, i.e., by heating Adjustment is organized and residual stress is relaxed or is removed;2. removed with mechanism and adjust residual stress, i.e., using material Material is internal to be produced plastic deformation to reach the purpose for lowering or adjusting residual stress.First method can not thoroughly remove remaining answering Power, can typically only remove 30%~60% residual stress;Second method often destroys the integrality of forging.

The content of the invention

The technical problem to be solved in the present invention is to provide a kind of method using " solid solution+cold expanding shape+timeliness ", removes 2A70 The residual stress of aluminium alloy rings, can remove the residual stress of ring more than 90%, improve the performance of ring.

To solve above-mentioned technical problem, low stress 2A70 aluminium alloy rings manufacture methods of the present invention, its technical scheme Comprise the following steps:

2A70 aluminium alloys are cutting into into bar according to certain specification;Electric furnace is lighted and 450 ± 10 DEG C are heated to, to temperature Afterwards, 2A70 rodss and bars of aluminium alloy are put into into heating in electric furnace, insulation, temperature retention time is calculated by 1.8min/mm;By bar from electric furnace Take out, being transferred under forcing press carries out jumping-up, punching and make middle base, transfer time≤50s;Middle base is melted down into while hot heating To 450 ± 10 DEG C of insulations, temperature retention time presses 1.8min/mm;

Middle base is taken out and is rolled, rolled in advance for the first time:Core roller is rolled with the feed speed of 2.42mm/s, is reached After estimated size, the feed speed of core roller is reduced to into 0.58mm/s, carries out campus;Roll in advance for the second time:Core roller is with 1.28mm/s's Feed speed is rolled, and after reaching estimated size, the feed speed of core roller is reduced to into 0.33mm/s, carries out campus;For the third time Roll in advance:Core roller is rolled with the feed speed of 0.75mm/s, after reaching estimated size, the feed speed of core roller is reduced to 0.42mm/s, carries out campus;Roll forming:Core roller is rolled with the feed speed of 0.37mm/s, after reaching estimated size, will The feed speed of core roller is reduced to 0.09mm/s, carries out campus, then takes out and obtains 2A70 aluminium alloy rings;

2A70 aluminium alloy rings are put into into heating, insulation in the electric furnace that temperature is 530 ± 5 DEG C, temperature retention time is 170min ~180min;Then ring is taken out to be put in tank and is cooled down, transfer time≤10s, water temperature >=85 DEG C;

After taking out in ring bath groove, room temperature is cooled to, being put in shape expanding machine carries out cold expanding shape, bulging amount is 1.8% ~2.2%;

Ring after bulging is put into into heating, insulation, temperature retention time 11 hours~12 in the electric furnace that temperature is 190 ± 5 DEG C Hour, disperse air cooling;Finally give the 2A70 aluminium alloy rings with low stress.

Compared with prior art, beneficial effects of the present invention are as follows:

Low stress 2A70 aluminium alloy rings manufacture methods of the present invention, the method for " solid solution+cold expanding shape+timeliness ", effectively The residual stress for eliminating ring, ring size after roughing and heat treatment is relatively stable, effectively improves part machine and adds Deformation afterwards.Solid solution cooling improves water temperature requirement using more than 85 DEG C of aqueous medium compared with traditional solution, increased water Mobility (reduction viscosity), the uniformity of temperature, advantageously reduces residual stress level when being conducive to forging solid solution to cool down;Solid solution After carry out cold expanding shape, bulging deformation amount controlling adjusts the residual stress inside forging 1.8%~2.2%, reduces residual stress Level and improve stress distribution.

Specific embodiment

Implementing low stress 2A70 aluminium alloy rings manufacture methods of the present invention needs to provide forge furnace, pressure The equipment such as machine, manipulator, looping mill, heat-treatment furnace, shape expanding machine, tank.Its specific embodiment:

The main chemical elements content (percentage by weight) of the 2A70 aluminium alloys is:Containing Mn amount≤0.2%, si content≤ 0.35%th, ni content 0.9%~1.5%, containing Ti amount 0.02%~0.1%, containing Cu amount 1.9%~2.5%, containing Fe amount 0.9% ~1.5% ,≤0.3%, balance of Al is measured containing Mg amounts 1.4%~1.8%, containing Zn.

The step of this method, is as follows:

2A70 aluminium alloys are cutting into into bar according to certain specification;Electric furnace is lighted and 450 ± 10 DEG C are heated to, to temperature Afterwards, 2A70 rodss and bars of aluminium alloy are put into into heating in electric furnace, insulation, temperature retention time is calculated by 1.8min/mm;By bar from electric furnace Take out, being transferred under forcing press carries out jumping-up, punching and make middle base, transfer time≤50s;Middle base is melted down into while hot heating To 450 ± 10 DEG C of insulations, temperature retention time presses 1.8min/mm;

Middle base is taken out and is rolled, rolled in advance for the first time:Core roller is rolled with the feed speed of 2.42mm/s, is reached After estimated size, the feed speed of core roller is reduced to into 0.58mm/s, carries out campus;Roll in advance for the second time:Core roller is with 1.28mm/s's Feed speed is rolled, and after reaching estimated size, the feed speed of core roller is reduced to into 0.33mm/s, carries out campus;For the third time Roll in advance:Core roller is rolled with the feed speed of 0.75mm/s, after reaching estimated size, the feed speed of core roller is reduced to 0.42mm/s, carries out campus;Roll forming:Core roller is rolled with the feed speed of 0.37mm/s, after reaching estimated size, will The feed speed of core roller is reduced to 0.09mm/s, carries out campus, then takes out and obtains 2A70 aluminium alloy rings;

2A70 aluminium alloy rings are put into into heating, insulation in the electric furnace that temperature is 530 ± 5 DEG C, temperature retention time is 170min ~180min;Then ring is taken out to be put in tank and is cooled down, transfer time≤10s, water temperature >=85 DEG C;

After taking out in ring bath groove, room temperature is cooled to, being put in shape expanding machine carries out cold expanding shape, bulging amount is 1.8% ~2.2%;

Ring after bulging is put into into heating, insulation, temperature retention time 11 hours~12 in the electric furnace that temperature is 190 ± 5 DEG C Hour, disperse air cooling;Finally give the 2A70 aluminium alloy rings with low stress.

Claims (1)

1. a kind of low stress 2A70 aluminium alloy rings manufacture methods, it is characterised in that comprise the following steps:
2A70 aluminium alloys are cutting into into bar according to certain specification;Electric furnace is lighted and 450 ± 10 DEG C are heated to, to after temperature, 2A70 rodss and bars of aluminium alloy are put into into heating in electric furnace, insulation, temperature retention time is calculated by 1.8min/mm;Bar is taken from electric furnace Go out, being transferred under forcing press carries out jumping-up, punching and make middle base, transfer time≤50s;Middle base is melted down while hot and is heated to 450 ± 10 DEG C of insulations, temperature retention time presses 1.8min/mm;
Middle base is taken out and is rolled, rolled in advance for the first time:Core roller is rolled with the feed speed of 2.42mm/s, reaches estimated After size, the feed speed of core roller is reduced to into 0.58mm/s, carries out campus;Roll in advance for the second time:Core roller is with the feeding of 1.28mm/s Speed is rolled, and after reaching estimated size, the feed speed of core roller is reduced to into 0.33mm/s, carries out campus;Third time is rolled in advance: Core roller is rolled with the feed speed of 0.75mm/s, after reaching estimated size, the feed speed of core roller is reduced to into 0.42mm/s, Carry out campus;Roll forming:Core roller is rolled with the feed speed of 0.37mm/s, after reaching estimated size, by entering for core roller 0.09mm/s is reduced to speed, campus is carried out, is then taken out and is obtained 2A70 aluminium alloy rings;
It is heating in 530 ± 5 DEG C of electric furnace, insulation that 2A70 aluminium alloy rings are put into into temperature, temperature retention time be 170min~ 180min;Then ring is taken out to be put in tank and is cooled down, transfer time≤10s, water temperature >=85 DEG C;
By ring wash by water groove in take out after, be cooled to room temperature, being put in shape expanding machine carries out cold expanding shape, bulging amount be 1.8%~ 2.2%;
Ring after bulging is put into heating in the electric furnace that temperature is 190 ± 5 DEG C, is incubated, temperature retention time 11 hours~12 hours, Dispersion air cooling;Finally give the 2A70 aluminium alloy rings with low stress.
CN201611092426.XA 2016-12-01 2016-12-01 Manufacturing method of low stress 2A70 aluminum alloy ring piece CN106623704A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107443023A (en) * 2017-08-31 2017-12-08 武汉理工大学 A kind of flexible processing method with muscle thin-walled large aluminum alloy cylinder
CN108247288A (en) * 2017-12-18 2018-07-06 贵州航宇科技发展股份有限公司 A kind of machining manufacture of Ti6242 titanium alloy thin walls ring
CN108890218A (en) * 2018-05-16 2018-11-27 江苏理工学院 A kind of high strength heat resistant alloy forge piece manufacturing process
CN110170606A (en) * 2019-05-22 2019-08-27 中南大学 A kind of preparation process of the high cylinder part of 2A14 aluminium alloy

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Publication number Priority date Publication date Assignee Title
EP0852525B1 (en) * 1995-09-29 1999-12-29 Maschinenfabrik Köppern GmbH. & Co. KG Method of producing large annular workpieces
CN1586753A (en) * 2004-09-21 2005-03-02 武汉理工大学 Method for rolling and forming rectangular section aluminium alloy ring piece
CN101279348A (en) * 2008-04-23 2008-10-08 贵州航宇科技发展有限公司 Method for rolling and shaping aluminum alloy conical ring
CN101537466A (en) * 2009-04-30 2009-09-23 西南铝业(集团)有限责任公司 Method for manufacturing aluminium alloy rings with high performance and low residual stress
CN102085552A (en) * 2010-12-10 2011-06-08 贵州航宇科技发展有限公司 Roll forming method of 2A70 aluminum alloy thin-walled ring forging
CN102409270A (en) * 2011-11-07 2012-04-11 内蒙古北方重工业集团有限公司 Method for rolling large-sized aluminum alloy ring piece and performing solid solution treatment by using electric furnace
CN105369171A (en) * 2015-12-02 2016-03-02 贵州安大航空锻造有限责任公司 Rolling and heat treatment method for 6061 aluminum alloy ring part
CN105925924A (en) * 2016-06-11 2016-09-07 江苏迅达电磁线有限公司 Thermomechanical treatment method capable of improving performance of end ring for high-speed rail

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EP0852525B1 (en) * 1995-09-29 1999-12-29 Maschinenfabrik Köppern GmbH. & Co. KG Method of producing large annular workpieces
CN1586753A (en) * 2004-09-21 2005-03-02 武汉理工大学 Method for rolling and forming rectangular section aluminium alloy ring piece
CN101279348A (en) * 2008-04-23 2008-10-08 贵州航宇科技发展有限公司 Method for rolling and shaping aluminum alloy conical ring
CN101537466A (en) * 2009-04-30 2009-09-23 西南铝业(集团)有限责任公司 Method for manufacturing aluminium alloy rings with high performance and low residual stress
CN102085552A (en) * 2010-12-10 2011-06-08 贵州航宇科技发展有限公司 Roll forming method of 2A70 aluminum alloy thin-walled ring forging
CN102409270A (en) * 2011-11-07 2012-04-11 内蒙古北方重工业集团有限公司 Method for rolling large-sized aluminum alloy ring piece and performing solid solution treatment by using electric furnace
CN105369171A (en) * 2015-12-02 2016-03-02 贵州安大航空锻造有限责任公司 Rolling and heat treatment method for 6061 aluminum alloy ring part
CN105925924A (en) * 2016-06-11 2016-09-07 江苏迅达电磁线有限公司 Thermomechanical treatment method capable of improving performance of end ring for high-speed rail

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107443023A (en) * 2017-08-31 2017-12-08 武汉理工大学 A kind of flexible processing method with muscle thin-walled large aluminum alloy cylinder
CN108247288A (en) * 2017-12-18 2018-07-06 贵州航宇科技发展股份有限公司 A kind of machining manufacture of Ti6242 titanium alloy thin walls ring
CN108890218A (en) * 2018-05-16 2018-11-27 江苏理工学院 A kind of high strength heat resistant alloy forge piece manufacturing process
CN110170606A (en) * 2019-05-22 2019-08-27 中南大学 A kind of preparation process of the high cylinder part of 2A14 aluminium alloy

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Application publication date: 20170510