CN103350180A - Forging forming method of fan shaft made of C250 maraging steel - Google Patents
Forging forming method of fan shaft made of C250 maraging steel Download PDFInfo
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- CN103350180A CN103350180A CN2013102477222A CN201310247722A CN103350180A CN 103350180 A CN103350180 A CN 103350180A CN 2013102477222 A CN2013102477222 A CN 2013102477222A CN 201310247722 A CN201310247722 A CN 201310247722A CN 103350180 A CN103350180 A CN 103350180A
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Abstract
The method discloses a forging forming method of a fan shaft made of C250 maraging steel, which is provided for obtaining a forging with a better structure and a better property. The method comprises processing steps as follows: a C250 maraging steel bar material which is subjected to blanking according to specification is heated to a forging temperature ranging from 1,000 DEG C to 1,060 DEG C, heated to the forming temperature again after upset and stretched, and prepared into a pre-forged blank in a forging die; the pre-forged blank is forged into a fan shaft forging at a strain rate of 0.01s<-1>-0.001s<-1> in the forging die after heated to a forging temperature ranging from 1,000 DEG C to 1,020 DEG C; and the fan shaft forging is subjected to solid solution and aging heat treatment after forged, the solid solution is that the fan shaft forging is heated to 820 DEG C and is subjected to air cooling after heat insulation, and the aging is that the fan shaft forging is heated to 480 DEG C and is subjected to air cooling after heat insulation. The forging is mainly used for being prepared into a fan shaft part of an aero-engine.
Description
Technical field
The present invention relates to a kind of forging forming method of forged shaft, particularly related to the forging forming method of C250 Maraging steel fan shaft.
Background technology
The C250 Maraging steel is as matrix take carbon-free (or Ultra-low carbon) iron nickel martensite, by Co, the Mo that adds proper proportion, a kind of unimach that the elements such as Ti, Al form, owing to have good obdurability, cold and hot working, without the advantage such as decarburization, quenching distortion be little, be widely used in the superhigh intensity key components and parts in the fields such as Aeronautics and Astronautics.
On August 13rd, 2003, disclosed Chinese invention patent specification CN 1435287A disclosed a kind of major axis type high temp alloy heavy forging integrate forging process, this technique comprises the choosing of design, blank, blank local heat, the partial plastic forming of assembling die, the method has realized the integral forging and forming of major axis type high temp alloy heavy forging by blank being carried out local heat and by assembling die the blank through local heat being carried out partial plastic forming.But, forge C250 Maraging steel long-axis forging for example in the process of fan shaft forging adopting the method, if selections such as forging temperature, strain rate of smithing technological parameter is improper and mate bad, forging can not be in the dynamic recrystallization zone fully when distortion is shaped, thereby tissue and performance to forging have a negative impact, even because tissue and performance inconsistency lattice produce waste product.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of forging forming method that makes forging temperature and strain rate be complementary to realize C250 Maraging steel fan shaft, the method can make the C250 Maraging steel be in the dynamic recrystallization zone fully when distortion is shaped, thereby obtains the forging of tissue and better performances.
For solving the problems of the technologies described above, the forging forming method of C250 Maraging steel fan shaft of the present invention, its technical scheme may further comprise the steps:
Being heated to 1000 ℃～1060 ℃ forging temperature by the C250 martensite ag(e)ing Steel Bar During of specification blanking, after jumping-up, pulling, being heated to again described forging temperature and in forging die, making pre-forging stock;
Described pre-forging stock is heated to after 1000 ℃～1020 ℃ the forging temperature in forging die with 0.01s
-1～0.001s
-1Strain rate be described pre-forging stock forging and molding the fan shaft forging.
Described fan shaft forging is by solid solution+timeliness heat treatment, and described solid solution is that the fan forging shaft is heated to 820 ℃ of air coolings after insulation, and described timeliness is that the fan forging shaft is heated to 480 ℃ of air coolings after insulation.
Compared with prior art, beneficial effect of the present invention is as follows:
The forging forming method of C250 Maraging steel fan shaft of the present invention is heated to pre-forging stock after 1000 ℃～1020 ℃ the forging temperature with 0.01s
-1～0.001s
-1Strain rate distortion become the fan shaft forging, by forging temperature and strain rate are complementary, can make the C250 Maraging steel when distortion, be in the dynamic recrystallization zone fully, along with the increase of pre-forging stock deflection and the continuous rising of metallic atom dislocation density, deformation energy is also constantly increasing after reaching certain value, deformed grains will be take some subgrain or impurity phase as core growth Cheng Xin crystal grain, and then eliminate the work hardening process of crystal grain inside fully, obtain even tissue and the higher fan shaft forging of performance.
The room temperature tensile performance of this steel fan shaft forging after testing, its tensile strength is that 1840MPa(is greater than the 1800MPa of instructions for use), yield strength when its percentage elongation is 0.2% is that 1780MPa(is greater than 1720 MPa of instructions for use), elongation after fracture be 11.5%(greater than instructions for use 4%), the contraction percentage of area be 62%(greater than instructions for use 35%), hardness HRC be 49(greater than instructions for use 48), ballistic work is that 82J(is greater than the 11J of instructions for use), fracture toughness is 110MPa
(greater than the 90MPa of instructions for use
), satisfied instructions for use fully.
The macrostructure of this steel fan shaft forging after testing: have no blackening, hickie, radially segregation, Ring pattern and other defective, meet instructions for use.
The grain size of this steel fan shaft forging has after testing reached 7.5 grades (greater than 6.5 grades of instructions for use).
Through this steel fan shaft forging is carried out ultrasonic examination, have no single the showing that exceed standard, the clutter level is below Φ 0.8-6dB.
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 C250 Maraging steel fan shaft forging.
The specific embodiment
The specific embodiment of the present invention is as follows:
The main chemical elements content (percentage by weight) of C250 Maraging steel (00Ni18Co8Mo5TiAl) is: C content≤0.01%, contain Mn amount≤0.1%, si content≤0.1%, ni content 17%～19%, contain Mo amount 4.6%～5.2%, contain O amount≤0.002%, contain Al amount 0.05%～0.15%, contain Ti amount 0.3%～0.5%, contain Co amount 7%～8.5%, P content≤0.008%, contain S amount≤0.005%, contain N amount≤0.002%, surplus is Fe.
The forging and forming technology step of this steel fan shaft forging is as follows:
As shown in Figure 1, the forging temperature that is heated to 1000 ℃～1060 ℃ by the C250 martensite ag(e)ing Steel Bar During 10 of specification blanking, after jumping-up, pulling, in forging die, make pre-forging stock 20 after being heated to again described forging temperature, more pre-forging stock 20 is heated to after 1000 ℃～1020 ℃ the forging temperature in forging die with 0.01s
-1～0.001s
-1Strain rate be pre-forging stock 20 forging and moldings fan shaft forging 30, the top of this forging has circular trough 301.Final forging temperature in the forging process 〉=850 ℃.
Forge aft-fan forging shaft 30 through solid solution+timeliness heat treatment, wherein solid solution is that fan forging shaft 30 is heated to 820 ℃ of air coolings after insulation, and timeliness is that fan forging shaft 30 is heated to 480 ℃ of air coolings after insulation.
Claims (2)
1. the forging forming method of a C250 Maraging steel fan shaft is characterized in that, may further comprise the steps:
Being heated to 1000 ℃～1060 ℃ forging temperature by the C250 martensite ag(e)ing Steel Bar During of specification blanking, after jumping-up, pulling, being heated to again described forging temperature and in forging die, making pre-forging stock;
Described pre-forging stock is heated to after 1000 ℃～1020 ℃ the forging temperature in forging die with 0.01s
-1～0.001s
-1Strain rate be described pre-forging stock forging and molding the fan shaft forging.
2. the forging forming method of C250 Maraging steel fan shaft according to claim 1, it is characterized in that: described fan shaft forging is by solid solution+timeliness heat treatment, described solid solution is that the fan forging shaft is heated to 820 ℃ of air coolings after insulation, and described timeliness is that the fan forging shaft is heated to 480 ℃ of air coolings after insulation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102477222A CN103350180A (en) | 2013-06-21 | 2013-06-21 | Forging forming method of fan shaft made of C250 maraging steel |
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|---|---|---|---|
| CN2013102477222A CN103350180A (en) | 2013-06-21 | 2013-06-21 | Forging forming method of fan shaft made of C250 maraging steel |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104372149A (en) * | 2014-10-24 | 2015-02-25 | 无锡市派克重型铸锻有限公司 | Forging method for improving impact property of heat-resisting martensite steel |
| CN104722687A (en) * | 2015-03-03 | 2015-06-24 | 江苏凌飞锻造有限公司 | Forging method for 55NiCrMoV7 die steel |
| CN105728631A (en) * | 2014-12-10 | 2016-07-06 | 陕西宏远航空锻造有限责任公司 | Forging method for maraging steel disc-shaft integrated forged piece |
| CN105935738A (en) * | 2016-06-30 | 2016-09-14 | 安徽省瑞杰锻造有限责任公司 | Forging process for ledeburite steel shaft |
| CN106541069A (en) * | 2016-12-07 | 2017-03-29 | 陕西宏远航空锻造有限责任公司 | A kind of Integral die-forged method of large-scale GH4169 turbine wheel shafts |
| CN106862471A (en) * | 2015-12-14 | 2017-06-20 | 陕西宏远航空锻造有限责任公司 | A kind of forming method of hollow extruding C250 steel alloy long-axis forgings |
| WO2022234220A1 (en) * | 2021-05-05 | 2022-11-10 | Safran Aircraft Engines | Method for forging a part made of maraging steel |
Citations (4)
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|---|---|---|---|---|
| JPS59232644A (en) * | 1983-06-15 | 1984-12-27 | Honda Motor Co Ltd | Blank material for forging crank shaft |
| CN101480689A (en) * | 2008-12-25 | 2009-07-15 | 贵州安大航空锻造有限责任公司 | Near-isothermal forging method of two-phase titanium alloy disk-type forgeable piece |
| CN102615478A (en) * | 2012-02-28 | 2012-08-01 | 杭州荣力铸锻有限公司 | Forging process of wind power main shaft |
| CN102764954A (en) * | 2012-06-26 | 2012-11-07 | 江苏金源锻造股份有限公司 | Forging process for wind generator spindle |
-
2013
- 2013-06-21 CN CN2013102477222A patent/CN103350180A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59232644A (en) * | 1983-06-15 | 1984-12-27 | Honda Motor Co Ltd | Blank material for forging crank shaft |
| CN101480689A (en) * | 2008-12-25 | 2009-07-15 | 贵州安大航空锻造有限责任公司 | Near-isothermal forging method of two-phase titanium alloy disk-type forgeable piece |
| CN102615478A (en) * | 2012-02-28 | 2012-08-01 | 杭州荣力铸锻有限公司 | Forging process of wind power main shaft |
| CN102764954A (en) * | 2012-06-26 | 2012-11-07 | 江苏金源锻造股份有限公司 | Forging process for wind generator spindle |
Non-Patent Citations (1)
| Title |
|---|
| 赵飞等: "C-250马氏体时效钢逆变奥氏体再结晶温度的测定", 《热加工工艺》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104372149A (en) * | 2014-10-24 | 2015-02-25 | 无锡市派克重型铸锻有限公司 | Forging method for improving impact property of heat-resisting martensite steel |
| CN105728631A (en) * | 2014-12-10 | 2016-07-06 | 陕西宏远航空锻造有限责任公司 | Forging method for maraging steel disc-shaft integrated forged piece |
| CN104722687A (en) * | 2015-03-03 | 2015-06-24 | 江苏凌飞锻造有限公司 | Forging method for 55NiCrMoV7 die steel |
| CN106862471A (en) * | 2015-12-14 | 2017-06-20 | 陕西宏远航空锻造有限责任公司 | A kind of forming method of hollow extruding C250 steel alloy long-axis forgings |
| CN105935738A (en) * | 2016-06-30 | 2016-09-14 | 安徽省瑞杰锻造有限责任公司 | Forging process for ledeburite steel shaft |
| CN106541069A (en) * | 2016-12-07 | 2017-03-29 | 陕西宏远航空锻造有限责任公司 | A kind of Integral die-forged method of large-scale GH4169 turbine wheel shafts |
| WO2022234220A1 (en) * | 2021-05-05 | 2022-11-10 | Safran Aircraft Engines | Method for forging a part made of maraging steel |
| FR3122667A1 (en) * | 2021-05-05 | 2022-11-11 | Safran Aircraft Engines | Process of forging a piece of maraging steel |
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Application publication date: 20131016 |