CN103350167A - Roll forming method of 4340 H steel E-shaped ring forging - Google Patents

Roll forming method of 4340 H steel E-shaped ring forging Download PDF

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Publication number
CN103350167A
CN103350167A CN2013102692854A CN201310269285A CN103350167A CN 103350167 A CN103350167 A CN 103350167A CN 2013102692854 A CN2013102692854 A CN 2013102692854A CN 201310269285 A CN201310269285 A CN 201310269285A CN 103350167 A CN103350167 A CN 103350167A
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forging
ring
steel
heated
shaped
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CN103350167B (en
Inventor
魏志坚
占立水
欧阳斌
杨晋
朱灵华
邹朝江
李艳红
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AVIC Guizhou Anda Aviation Forging Co Ltd
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Guizhou Anda Aviation Forging Co Ltd
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Abstract

The invention discloses a roll forming method of a 4340 H steel E-shaped ring forging, which is provided for guaranteeing a forming size of the E-shaped ring forging and preventing the defects of folding, offset, insufficient filling and the like. The method comprises processing steps as follows: a 4340 H steel bar material which is subjected to blanking according to specification is heated to a forging temperature ranging from 1,100 DEG C to 1,140 DEG C and is upset and punched to obtain a primary ring blank on a press machine; then, the primary ring blank is heated to a forging temperature ranging from 1,120 DEG C to 1,160 DEG C and is subjected to inner-bore material gathering to obtain a secondary ring blank on a ring rolling machine; and the secondary ring blank is placed in the ring rolling machine equipped with a main roller die for roll forming after the secondary ring blank is heated to a forging temperature ranging from 1,140 DEG C to 1,200 DEG C, the deformation is larger than or equal to 45%, and the E-shaped ring forging is obtained. The E-shaped ring forging is subjected to quenching and high-temperature tempering thermal treatment after forged, the quenching is that the E-shaped ring forging is heated to 860 DEG C and is subjected to oil cooling after thermal insulation, and the high-temperature tempering is that the E-shaped ring forging is heated to 590 DEG C and is subjected to air cooling after thermal insulation. The forging is mainly used for the field of wind power and mining machinery and the like.

Description

The roll-forming method of 4340H steel E type ring forging
Technical field
The present invention relates to a kind of forging method of annular element, particularly related to the roll-forming method of 4340H steel E type ring forging.
Background technology
The 4340H steel is a kind of structural steel of function admirable, under quality adjustment condition, have good quenching degree and preferably intensity and toughness, can make large-scale load-carrying construction spare, therefore, 4340H is widely used in the high strength key components and parts in the fields such as wind-power electricity generation, mine equipment.
On October 8th, 2008, disclosed Chinese invention patent specification CN 101279343A disclosed a kind of method for rolling and shaping of stainless steel special-shaped ring forging, the method comprises blanking, jumping-up, punching, looping mill rolling, after the method punching, be shaped by designing the direct looping mill rolling of difform mould, realize the rolling and shaping of forging special-shape ring.But the rectangular bloom of the intermediate blank of the method for obtaining after rolling in advance is high for the strength of materials, complex-shaped forging special-shape ring, such as 4340H steel " E " type ring forging, if adopt said method to be shaped, easily occur folding, partially neck, the defective such as be not fully filled.
Summary of the invention
The technical problem to be solved in the present invention provides the roll-forming method that the poly-material of a kind of internal diameter base is realized 4340H steel E type ring forging, and the method can guarantee the roll forming size of 4340H steel E type ring forging.
For solving the problems of the technologies described above, the milling method of 4340H steel E type ring forging of the present invention, its technical scheme may further comprise the steps:
4340H Steel Bar During by the specification blanking is heated to 1100 ℃ ~ 1140 ℃ forging temperature, on forcing press, after jumping-up, punching, obtains a secondary ring base;
After a described secondary ring base being heated to 1120 ℃ ~ 1160 ℃ forging temperature, on looping mill, behind the poly-material of internal diameter, obtain two secondary ring bases;
After described two secondary ring bases being heated to 1140 ℃ ~ 1200 ℃ forging temperature, put it into roll forming on the looping mill that the home roll mould is housed, its deflection 〉=45% obtains E type ring forging.
Described 4340H steel E type ring forging is forged by quenching+high tempering heat treatment, be modified heat treatment, described quenching is that 4340H steel E type ring forging is heated to 860 ℃ of oil coolings after insulation, and described high tempering is that 4340H steel E type ring forging is heated to 590 ℃ of air coolings after insulation.
Compared with prior art, beneficial effect of the present invention is as follows:
The roll-forming method of 4340H steel E type ring forging of the present invention by the design to intermediate blank, makes blank distribute along the ring longitudinal section, thereby so that each size of the final E type ring forging that is shaped all meet the demands.Adopt the blank-making method of the poly-material of internal diameter, only need to use the core roller mould just can finish the base process, avoided the poly-material of external diameter, need to drop into the home roll mould, and the home roll mould is heavy and expense is high, the processing duration is installed the shortcomings such as relatively inconvenient.The two secondary ring bases that the method obtains, through roll forming, its deflection 〉=45% can obtain the E type ring forging of sense of organization excellence.
Sectional dimension through measuring 4340H steel E type ring forging all meets instructions for use.
The room temperature tensile performance of 4340H steel E type ring forging after testing, its tensile strength is that 1030MPa(is greater than the 980MPa of instructions for use), yield strength when its percentage elongation is 0.2% is that 863MPa(is greater than the 835MPa of instructions for use), elongation after fracture be 18%(greater than instructions for use 12%), the contraction percentage of area be 64%(greater than instructions for use 55%), hardness HB be 325(satisfy instructions for use 300 ~ 345), satisfied instructions for use fully.
The macrostructure of 4340H steel E type ring forging after testing: have no blackspot, hickie, radially segregation, spheroidal structure and other defective, meet instructions for use.
The grain size of 4340H steel E type ring forging has after testing reached 8.5 grades (greater than 6.5 grades of instructions for use).
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Fig. 1 is the Forging Technology flow chart of 4340H steel E type ring forging.
The specific embodiment
The specific embodiment of the present invention is as follows:
The main chemical elements content (percentage by weight) of 4340H steel is: C content 0.36%~0.44%, contain Mn amount 0.50%~0.80%, si content 0.17%~0.37%, contain S amount≤0.020%, P content≤0.020%, contain Cr amount 0.60%~0.90%, ni content 1.25%~1.75%, contain Mo amount 0.15%~0.25%, surplus is Fe.
The forging and forming technology step of this steel E type ring forging is as follows:
As shown in Figure 1, the 4340H Steel Bar During 10 by the specification blanking is heated to 1100 ℃ ~ 1140 ℃ forging temperature, places it on the chopping block of forcing press, after jumping-up, punching, obtain a secondary ring base 20; After again a secondary ring base 20 being heated to 1120 ℃ ~ 1160 ℃ forging temperature, on the looping mill with core roller mould, behind the poly-material of internal diameter, obtain two secondary ring bases 30; After again two secondary ring bases 30 being heated to 1140 ℃ ~ 1200 ℃ forging temperature, put it into roll forming on the looping mill that the home roll mould is housed, its deflection 〉=45% obtains E type ring forging 40.
4340H steel E type ring forging 40 is through quenching+high tempering heat treatment after forging, be modified heat treatment, described quenching is that 4340H steel E type ring forging 40 is heated to 860 ℃ of oil coolings after insulation, and described high tempering is that 4340H steel E type ring forging 40 is heated to 590 ℃ of air coolings after insulation.

Claims (2)

1. the roll-forming method of a 4340H steel E type ring forging is characterized in that, may further comprise the steps:
4340H Steel Bar During by the specification blanking is heated to 1100 ℃ ~ 1140 ℃ forging temperature, on forcing press, after jumping-up, punching, obtains a secondary ring base;
After a described secondary ring base being heated to 1120 ℃ ~ 1160 ℃ forging temperature, on looping mill, behind the poly-material of internal diameter, obtain two secondary ring bases;
After described two secondary ring bases being heated to 1140 ℃ ~ 1200 ℃ forging temperature, put it into roll forming on the looping mill that the home roll mould is housed, its deflection 〉=45% obtains E type ring forging.
2. the roll-forming method of 4340H steel E type ring forging according to claim 1, it is characterized in that: described 4340H steel E type ring forging is forged by quenching+high tempering heat treatment, be modified heat treatment, described quenching is that 4340H steel E type ring forging is heated to 860 ℃ of oil coolings after insulation, and described high tempering is that 4340H steel E type ring forging is heated to 590 ℃ of air coolings after insulation.
CN201310269285.4A 2013-06-30 2013-06-30 Roll forming method of 4340 H steel E-shaped ring forging Active CN103350167B (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104148557A (en) * 2014-06-30 2014-11-19 贵州安大航空锻造有限责任公司 Super-plasticity forming method for GH4169 alloy ring part with complex section
CN104148396A (en) * 2014-06-30 2014-11-19 贵州安大航空锻造有限责任公司 Core roller and roll forming method of large inner-step-section ring pieces
CN105081678A (en) * 2014-05-13 2015-11-25 陕西宏远航空锻造有限责任公司 Rolling forming method for nickel-base superalloy high-cylindrical ring piece
CN106077377A (en) * 2016-06-20 2016-11-09 江苏大学 Biomass fuel granulator 4Cr13 ring mould rolles over ring new process for processing
CN106166590A (en) * 2016-08-29 2016-11-30 贵州航天新力铸锻有限责任公司 The rolloff moulding manufacture method of the I-shaped forging of magnet support
CN108213289A (en) * 2016-12-14 2018-06-29 贵州航宇科技发展股份有限公司 A kind of production method of 410 material thin wall, half ring forging
CN108672624A (en) * 2018-05-03 2018-10-19 奥科宁克航空机件(苏州)有限公司 A kind of nickel base superalloy ring forging method
CN111036808A (en) * 2019-12-31 2020-04-21 王飞 Processing method of Ti1023 alloy special-shaped ring piece
CN111069496A (en) * 2019-12-30 2020-04-28 西北工业大学 Preparation method of GH4738 alloy crystal homogenizing ring forging
CN111705187A (en) * 2020-07-02 2020-09-25 南京迪威尔高端制造股份有限公司 Manufacturing method for reducing stress cracks of 4340 steel ring piece
CN112296245A (en) * 2020-09-17 2021-02-02 豪梅特航空机件(苏州)有限公司 Forging method for improving creep property of Wasp ring forging

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JPH06106283A (en) * 1992-09-28 1994-04-19 Kobe Steel Ltd Method for forming ring having partial projection on its outer circumference
JP2006289394A (en) * 2005-04-07 2006-10-26 Daido Steel Co Ltd METHOD FOR MANUFACTURING RING MADE OF Mn-Cu ALLOY
CN1963260A (en) * 2006-11-22 2007-05-16 重庆长风精化毛坯有限责任公司 Gear ring blank for automobile synchronizer and method for processing same
CN101279343A (en) * 2008-04-23 2008-10-08 贵州安大航空锻造有限责任公司 Method for rolling and shaping stainless steel special-shaped ring forging
CN101279344A (en) * 2008-04-23 2008-10-08 贵州安大航空锻造有限责任公司 Method for rolling and shaping aluminum alloy special-shaped ring forging
KR20110075130A (en) * 2009-12-28 2011-07-06 한국기계연구원 A semi-finished ring rolling machine and manufacturing method for profiled ring
CN103100622A (en) * 2012-12-12 2013-05-15 贵州航宇科技发展股份有限公司 Roll shaping method of ultrahigh-strength steel complex deformed section annular piece

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06106283A (en) * 1992-09-28 1994-04-19 Kobe Steel Ltd Method for forming ring having partial projection on its outer circumference
JP2006289394A (en) * 2005-04-07 2006-10-26 Daido Steel Co Ltd METHOD FOR MANUFACTURING RING MADE OF Mn-Cu ALLOY
CN1963260A (en) * 2006-11-22 2007-05-16 重庆长风精化毛坯有限责任公司 Gear ring blank for automobile synchronizer and method for processing same
CN101279343A (en) * 2008-04-23 2008-10-08 贵州安大航空锻造有限责任公司 Method for rolling and shaping stainless steel special-shaped ring forging
CN101279344A (en) * 2008-04-23 2008-10-08 贵州安大航空锻造有限责任公司 Method for rolling and shaping aluminum alloy special-shaped ring forging
KR20110075130A (en) * 2009-12-28 2011-07-06 한국기계연구원 A semi-finished ring rolling machine and manufacturing method for profiled ring
CN103100622A (en) * 2012-12-12 2013-05-15 贵州航宇科技发展股份有限公司 Roll shaping method of ultrahigh-strength steel complex deformed section annular piece

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105081678B (en) * 2014-05-13 2018-01-16 陕西宏远航空锻造有限责任公司 A kind of method for rolling and shaping of nickel base superalloy height cylinder ring
CN105081678A (en) * 2014-05-13 2015-11-25 陕西宏远航空锻造有限责任公司 Rolling forming method for nickel-base superalloy high-cylindrical ring piece
CN104148396A (en) * 2014-06-30 2014-11-19 贵州安大航空锻造有限责任公司 Core roller and roll forming method of large inner-step-section ring pieces
CN104148557B (en) * 2014-06-30 2016-05-25 贵州安大航空锻造有限责任公司 The super plastic forming method of GH4169 alloy complex section annular element
CN104148557A (en) * 2014-06-30 2014-11-19 贵州安大航空锻造有限责任公司 Super-plasticity forming method for GH4169 alloy ring part with complex section
CN106077377A (en) * 2016-06-20 2016-11-09 江苏大学 Biomass fuel granulator 4Cr13 ring mould rolles over ring new process for processing
CN106166590A (en) * 2016-08-29 2016-11-30 贵州航天新力铸锻有限责任公司 The rolloff moulding manufacture method of the I-shaped forging of magnet support
CN108213289B (en) * 2016-12-14 2020-01-07 贵州航宇科技发展股份有限公司 Manufacturing method of 410-material thin-wall semi-ring forging
CN108213289A (en) * 2016-12-14 2018-06-29 贵州航宇科技发展股份有限公司 A kind of production method of 410 material thin wall, half ring forging
CN108672624B (en) * 2018-05-03 2019-07-30 奥科宁克航空机件(苏州)有限公司 A kind of nickel base superalloy ring forging method
CN108672624A (en) * 2018-05-03 2018-10-19 奥科宁克航空机件(苏州)有限公司 A kind of nickel base superalloy ring forging method
CN111069496A (en) * 2019-12-30 2020-04-28 西北工业大学 Preparation method of GH4738 alloy crystal homogenizing ring forging
CN111069496B (en) * 2019-12-30 2021-06-01 西北工业大学 Preparation method of GH4738 alloy crystal homogenizing ring forging
CN111036808A (en) * 2019-12-31 2020-04-21 王飞 Processing method of Ti1023 alloy special-shaped ring piece
CN111036808B (en) * 2019-12-31 2021-06-15 王飞 Processing method of Ti1023 alloy special-shaped ring piece
CN111705187A (en) * 2020-07-02 2020-09-25 南京迪威尔高端制造股份有限公司 Manufacturing method for reducing stress cracks of 4340 steel ring piece
CN112296245A (en) * 2020-09-17 2021-02-02 豪梅特航空机件(苏州)有限公司 Forging method for improving creep property of Wasp ring forging

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