CN108705014B - A kind of die forging method of module forging - Google Patents

A kind of die forging method of module forging Download PDF

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Publication number
CN108705014B
CN108705014B CN201810433030.XA CN201810433030A CN108705014B CN 108705014 B CN108705014 B CN 108705014B CN 201810433030 A CN201810433030 A CN 201810433030A CN 108705014 B CN108705014 B CN 108705014B
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Prior art keywords
forging
module
heating
pulling
die
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CN201810433030.XA
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CN108705014A (en
Inventor
苏继伟
许燕燕
王哲
李林
刘宪民
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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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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J1/00Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
    • B21J1/06Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
    • 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

Abstract

The invention discloses a kind of die forging methods of module forging comprising the heating process: heating and pulling process by Heating Steel Ingots to 1220 DEG C~1240 DEG C, keep the temperature 9~15h;The pulling process: forging ratio≤2;Single depression distance is 0.2~0.22 times of original section size.This method can produce product with primary heating, reduce 2~3 heating, effectively improve production efficiency, shorten the pressing machine for operation time 45% or so, save resource, reduce production cost, it is contemplated that save cost 50% or so.

Description

A kind of die forging method of module forging
Technical field
The present invention relates to a kind of die forging method, especially a kind of die forging method of module forging.
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, one of the two big component parts of forging and stamping (forging and punching press).It presses According to tool of production difference, forging technology can be divided into flat-die forging, module forging, roll over ring and extraordinary forging.Wherein, die forging (module forging) refers to that metal stock obtains forging having compressive deformation in effigurate forging die thorax.
According to the requirement in JB-T5000.8-2007 " heavy-duty machinery general technical specifications " the 8th part forging: being forged with steel ingot When making, without jumping-up person, forging ratio is typically no less than 3.The forging ratio of general forging product is 3 or more in forging industry; It can guarantee that product flaw detection level meets requirement.
At present when production module forging, forging ratio reaches 4 under normal circumstances, and need to carry out jumping-up process, or even have Jumping-up twice is carried out to pull out;This production method not only increases production cost, and influences production efficiency, results in waste of resources.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of die forging methods of the module forging of low cost.
In order to solve the above technical problems, the technical solution used in the present invention is: it include heating and pulling process, it is described Heating process: by Heating Steel Ingots to 1220 DEG C~1240 DEG C, 9~15h is kept the temperature;
The pulling process: forging ratio≤2;Single depression distance is 0.2~0.22 times of original section size.
During pulling of the present invention, overturning continues to pull out after pulling every time, pulls out 6~8 times altogether.
In heating process of the present invention, the hot sending temperature of steel ingot is not less than 550 DEG C.
The steel grade of module forging of the present invention is 1.2738,718, P20 or S55Cr.
It is produced the beneficial effects of adopting the technical scheme are that the present invention can be produced with primary heating Product reduce 2~3 heating, effectively improve production efficiency, shorten the pressing machine for operation time 45% or so, save resource, Reduce production cost, it is contemplated that save cost 50% or so.
Specific embodiment
The present invention will be further described in detail with reference to the specific embodiments.
The die forging method of this module forging includes heating and pulling out process, and the technique of each process is as described below:
(1) heating process: steel ingot uses hot sending mode, and hot sending temperature is not less than 550 DEG C;It is directly risen after reaching heating furnace Temperature is warming up to 1220 DEG C~1240 DEG C and is kept the temperature, and the soaking time of common process is 7h, and this method technique compares common process Soaking time increase about 30% is 9~15h.
(2) the pulling process: forging ratio≤2;Single depression distance is the 0.2~0.22 of original section size (height) Times, pulling finishes 90 ° of overturning every time, then continues to pull out by above-mentioned single depression distance, pulls out 6~8 times altogether.
Embodiment 1: the die forging method of this module forging uses following concrete technologies.
(1) the module forging product that production material is S55Cr, steel ingot sectional dimension are 970*1726mm, module section ruler Very little is 660mm*1210mm.580 DEG C of temperature of hot sending;It is heated to 1230 DEG C of heat preservation 9h.
(2) use forging ratio for 1.85 direct drawing out forging technology, pulled out with 1200mm wide flat anvil, wide flat anvil Radius of corner be 120mm, length 2800mm.Pulling size per pass is shown in Table 1.
Table 1: pulling size (mm) per pass
90 ° of overturning after having pressed per pass, then depress a time;Direct drawing out, which is pulled out after the completion of 6 passages, to sectional dimension is The module forging product of 660mm*1210mm size.
(3) module forging obtained by the present embodiment meets SEP 1921 E/e grade requirement through ultrasonic examination.The forging of gained module Part examines hardness, inspection result are as follows: Steel ingot feeder head hardness HB 220~230, steel ingot mouth of a river hardness HB 210~225 meet and hand over The hardness HB 182~240 that goods requires.
Embodiment 2: the die forging method of this module forging uses following concrete technologies.
(1) the module forging product that production material is 718, steel ingot sectional dimension are that 965*1719mm produces module section ruler Very little is 700*1200mm.550 DEG C of temperature of hot sending;It is heated to 1220 DEG C of heat preservation 12h.
(2) use forging ratio for 1.97 direct drawing out forging technology, pulled out with 1200mm wide flat anvil, wide flat anvil Radius of corner be 120mm, length 2800mm.Pulling size per pass is shown in Table 2.
Table 2: pulling size (mm) per pass
90 ° of overturning after having pressed per pass, then depress a time;Direct drawing out, which is pulled out after the completion of 6 passages, to sectional dimension is The module forging product of 700mm*1200mm size.
(3) module forging obtained by the present embodiment meets SEP 1921 E/e grade requirement through ultrasonic examination.The forging of gained module Part examines hardness, inspection result are as follows: Steel ingot feeder head hardness HBC 37.5~38, steel ingot mouth of a river hardness HBC 35~37 meet and hand over The hardness HRC 34~38 that goods requires.
Embodiment 3: the die forging method of this module forging uses following concrete technologies.
(1) the module forging product that production material is 1.2738, steel ingot sectional dimension are that 950*1688mm produces module section Face is having a size of 675*1190mm.560 DEG C of temperature of hot sending;It is heated to 1240 DEG C of heat preservation 10h.
(2) use forging ratio for 2 direct drawing out forging technology, pulled out with 1200mm wide flat anvil, wide flat anvil Radius of corner is 120mm, length 2800mm.Pulling size per pass is shown in Table 3.
Table 3: pulling size (mm) per pass
90 ° of overturning after having pressed per pass, then depress a time;Direct drawing out, which is pulled out after the completion of 7 passages, to sectional dimension is The module forging product of 675mm*1190mm size.
(3) module forging obtained by the present embodiment meets SEP 1921 E/e grade requirement through ultrasonic examination.The forging of gained module Part examines hardness, inspection result are as follows: Steel ingot feeder head hardness HBC 36~36.5, steel ingot mouth of a river hardness HBC 35~37 meet and hand over The hardness HRC 33~37 that goods requires;Using the steel ingot of conventional die forging method production same batch, the hardness of gained module forging Value are as follows: Steel ingot feeder head hardness HBC 34~36, steel ingot mouth of a river hardness HBC 33~36.
Embodiment 4: the die forging method of this module forging uses following concrete technologies.
(1) the module forging product that production material is P20, steel ingot sectional dimension are that 960*1722mm produces module section ruler Very little is 700*1200mm.570 DEG C of temperature of hot sending;It is heated to 1230 DEG C of heat preservation 15h.
(2) use forging ratio for 1.9 direct drawing out forging technology, pulled out with 1200mm wide flat anvil, wide flat anvil Radius of corner be 120mm, length 2800mm.Pulling size per pass is shown in Table 4.
Table 4: pulling size (mm) per pass
90 ° of overturning after having pressed per pass, then depress a time;Direct drawing out, which is pulled out after the completion of 8 passages, to sectional dimension is The module forging product of 700mm*1200mm size.
(3) module forging obtained by the present embodiment meets SEP 1921 E/e grade requirement through ultrasonic examination.The forging of gained module Part examines hardness, inspection result are as follows: Steel ingot feeder head hardness HRC 33~34, steel ingot mouth of a river hardness HBC 32~34 meet delivery It is required that hardness HRC 31~36.

Claims (1)

1. a kind of die forging method of module forging comprising heating and pulling process, which is characterized in that primary heating can produce The heating process: product out by Heating Steel Ingots to 1220 DEG C~1240 DEG C, keeps the temperature 9~15h;The hot sending temperature of steel ingot is not low In 550 DEG C;
The pulling process: forging ratio < 2;Single depression distance is 0.2~0.22 times of original section size;It has pulled out every time Overturning continues to pull out after finishing, and pulls out 6~8 times altogether;
The steel grade of the module forging is 1.2738,718, P20 or S55Cr.
CN201810433030.XA 2018-05-08 2018-05-08 A kind of die forging method of module forging Active CN108705014B (en)

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110125314A (en) * 2019-05-17 2019-08-16 石钢京诚装备技术有限公司 A kind of forging method of high-carbon-chromium bearing steel forging stock
CN110814243A (en) * 2019-08-26 2020-02-21 石钢京诚装备技术有限公司 Forging method of 20CrNi3MnCuAl square steel
CN110756709A (en) * 2019-08-26 2020-02-07 石钢京诚装备技术有限公司 Forging method of forging material with diameter of 350-400mm
CN111250640A (en) * 2020-02-29 2020-06-09 河南中原特钢装备制造有限公司 Hot working method of large-diameter refined hot work die steel forging

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000015379A (en) * 1998-07-02 2000-01-18 Daido Steel Co Ltd Forging method of high carbon steel
CN101987343A (en) * 2009-08-07 2011-03-23 上海重型机器厂有限公司 Forging method of conical cylinder body of nuclear power equipment
CN103658479A (en) * 2012-09-12 2014-03-26 中航卓越锻造(无锡)有限公司 Technology for forging squeeze roller of cement roller press
CN105598328A (en) * 2016-01-18 2016-05-25 中钢集团邢台机械轧辊有限公司 Die steel forging production method
CN105643218A (en) * 2014-11-14 2016-06-08 重庆春顾机械制造有限公司 Machining method of gear parts of gearbox
CN107904510A (en) * 2017-11-21 2018-04-13 重庆文理学院 Comprehensive high performance hot die steel of one kind and preparation method thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000015379A (en) * 1998-07-02 2000-01-18 Daido Steel Co Ltd Forging method of high carbon steel
CN101987343A (en) * 2009-08-07 2011-03-23 上海重型机器厂有限公司 Forging method of conical cylinder body of nuclear power equipment
CN103658479A (en) * 2012-09-12 2014-03-26 中航卓越锻造(无锡)有限公司 Technology for forging squeeze roller of cement roller press
CN105643218A (en) * 2014-11-14 2016-06-08 重庆春顾机械制造有限公司 Machining method of gear parts of gearbox
CN105598328A (en) * 2016-01-18 2016-05-25 中钢集团邢台机械轧辊有限公司 Die steel forging production method
CN107904510A (en) * 2017-11-21 2018-04-13 重庆文理学院 Comprehensive high performance hot die steel of one kind and preparation method thereof

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