CN104148557B - The super plastic forming method of GH4169 alloy complex section annular element - Google Patents
The super plastic forming method of GH4169 alloy complex section annular element Download PDFInfo
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- CN104148557B CN104148557B CN201410305152.2A CN201410305152A CN104148557B CN 104148557 B CN104148557 B CN 104148557B CN 201410305152 A CN201410305152 A CN 201410305152A CN 104148557 B CN104148557 B CN 104148557B
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Abstract
The invention discloses a kind of super plastic forming method of GH4169 alloy complex section annular element, the steps include: GH4169 alloy to be heated to 1000 ± 10 DEG C, after the forging deformation that is 40%~50% through deflection, 890 DEG C of insulations 10 hours, be warming up to again 950 DEG C of insulations 3 hours, obtain thin brilliant GH4169 alloy blank; Be heated to again forging temperature, through jumping-up, punching, flat height, obtain this alloy hoop base; At the temperature of 1060 DEG C~1080 DEG C, to be the feed speed roll forming of 1.7mm/s to the maximum, obtain GH4169 alloy complex section annular element. The method can make GH4169 alloy in forming process in superplasticity state, thereby obtain performance and all satisfactory GH4169 alloy complex section annular elements of size. This annular element is widely used on the mechanized equipment of the industrial circles such as Aeronautics and Astronautics mainly as connecting ring, bearer ring etc.
Description
Technical field
The present invention relates to a kind of super plastic forming method, particularly related to a kind of GH4169 alloy complexityThe super plastic forming method of cross section annular element.
Background technology
Complex section annular element is widely used in aviation, boat as connection, rotating support ring, bearer ring etc.My god, on the big machinery equipment of the industrial circle such as engineering machinery, wind-power electricity generation, petrochemical industry. This class ringService condition harshness, has relatively high expectations to its serviceability, and annular element complex structure, adopts traditional one-tenthShape method is difficult to meet performance and the dimensional requirement of annular element simultaneously.
Resistance of deformation is low, material plasticity is high owing to having for Superplastic Forming Techniques, can one time precision form multipleMix the advantages such as part and obtain application widely in fields such as Aeronautics and Astronautics. At present, close for GH4169The superplastic research of gold, only limits in the tension test of material; And in looping mill rolling field, GH4169 is closedThe superplasticforming of gold complex section annular element there is not yet report.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of GH4169 alloy preform that uses tiny even grainedMaterial is realized the super plastic forming method of GH4169 alloy complex section annular element, and this blank should certainIn variable Rate and temperature range, can make GH4169 alloy in superplasticity state, thereby under less pressure,Obtain performance and all satisfactory GH4169 alloy complex section annular elements of size.
For solving the problems of the technologies described above, the superplasticity of GH4169 alloy complex section annular element of the present inventionManufacturing process, its technical scheme comprises the following steps:
(1) by certain specification, GH4169 alloy is cutting into bar;
(2) above-mentioned GH4169 alloy bar material is heated to 1000 ± 10 DEG C, after temperature, it is out of shapeAmount is 40%~50% forging deformation; Be heated again 890 DEG C of insulations after 10 hours, be warming up to 950 DEG CBe incubated 3 hours, obtain thin brilliant GH4169 alloy blank;
(3) by above-mentioned GH4169 alloy blank, be heated to after forging temperature, through jumping-up, punching, flat highDegree, makes GH4169 alloy hoop base, the height of GH4169 alloy hoop base and the final GH4169 being shapedAlloy complex section annular element height is identical;
(4) GH4169 alloy hoop base is carried out to jacket processing, and be heated to 1080 DEG C, insulation a period of timeAfter, proceed to looping mill; The home roll rotating speed of looping mill is adjusted to 1.0rad/s, the temperature of 1060 DEG C~1080 DEG CUnder, with the feed speed that is 1.7mm/s to the maximum by described GH4169 alloy hoop base through roll forming, obtainGH4169 alloy complex section annular element.
Further, the account form of maximum feed speed is as follows:
In formula,
v0For maximum feed speed;
ε is the maximum strain speed that the distortion of GH4169 Alloy during Superplastic allows;
V is the cumulative volume of GH4169 alloy rings;
μ is the coefficient of friction of GH4169 alloy in the time of forging temperature;
v1For the rotating speed of home roll;
R is the radius of home roll;
H is the height of ring.
Compared with prior art, beneficial effect of the present invention is as follows:
The super plastic forming method of GH4169 alloy complex section annular element of the present invention, by GH4169Alloy bar material is heated to 1000 ± 10 DEG C, and after temperature, it is carried out to deflection is 40%~50% forging deformation,Can obtain the GH4169 alloy with small grains; GH4169 alloy blank after forging is heated to 890 DEG CInsulation can be separated out the δ phase of abundant quantity for 10 hours, has limited the crystallization migration of recrystal grain, to carefullyChange crystal grain and played booster action, the crystallite dimension of recrystallization while contributing to control follow-up superplasticforming, fromAnd guarantee to obtain the GH4169 alloy complex section annular element of good mechanical properties; Again by GH4169Alloy is warming up to 950 DEG C of insulations can eliminate the grain size non-uniform phenomenon due to forging for 3 hours, obtainsMust wait the uniform small grains of axle, after tested, the grain size of this GH4169 alloy is 5 μ m (symbolsThat closes that GH4169 Alloy during Superplastic requires is less than 10 μ m), and being uniformly distributed of axle such as is. GH4169 closesGold, after grain refinement is processed, can improve the percentage elongation of material effectively, reduces flow stress.
The GH4169 alloy of the above-mentioned grain refinement processing of process is at the temperature of 1060 DEG C~1080 DEG C, with maximumWhen the feed speed of 1.7mm/s is rolled, the maximum of rate of straining is 8 × 10-4s-1, now, GH4169Alloy meets superplasticity condition, has reached superplasticity state. After tested, the now extension of GH4169 alloyRate can reach 220~265%, can meet the forming requirements of GH4169 alloy complex section ring completely.
Detailed description of the invention
Implement the super plastic forming method of GH4169 alloy complex section annular element of the present invention, needHigh-temperature heater, forcing press, manipulator are provided, the equipment such as looping mill, the home roll diameter of looping mill isΦ 860mm. Detailed description of the invention is as follows:
GH4169 alloy main chemical elements content (percentage by weight) is: C content≤0.08%, containing CrAmount 17.0%~21.0%, ni content 50.0%~55.0%, containing Co amount≤1.0%, containing Mo amount 2.80%~3.30%, containing Al amount 0.30%~0.70%, containing Ti amount 0.75%~1.15%, containing Nb amount 4.75%~5.50%, containing B amount≤0.006%, containing Mg amount≤0.01%, containing Mn amount≤0.35%, si content≤0.35%,P content≤0.015%, containing S amount≤0.015%, containing Cu amount≤0.30%, containing Ca amount≤0.01%, containing PbMeasure≤0.0005%, be Fe containing Se amount≤0.0003%, surplus.
The superplasticforming processing step of GH4169 alloy complex section annular element is as follows:
By certain specification, GH4169 alloy is cutting into bar; Described GH4169 alloy bar material is heated to1000 ± 10 DEG C,, after temperature, it is carried out to deflection is 40%~50% forging deformation; Be heated again890 DEG C of insulations, after 10 hours, are warming up to 950 DEG C of insulations 3 hours, obtain thin brilliant GH4169 alloy blank;By described GH4169 alloy blank, be heated to after forging temperature again, through jumping-up, punching, flat height, systemBecome GH4169 alloy hoop base, the height of this ring base and the final GH4169 alloy complex section annular being shapedPart height is identical.
Described GH4169 alloy hoop base is carried out to jacket processing, make follow-up forging in relative stationary temperatureUnder; GH4169 alloy hoop base is heated to 1080 DEG C, after insulation a period of time, packs looping mill into; To encircleThe home roll rotating speed of milling train is adjusted to 1.0rad/s, at the temperature of 1060 DEG C~1080 DEG C, to be 1.7mm/s to the maximumFeed speed by described GH4169 alloy blank through roll forming, obtain GH4169 alloy complex sectionAnnular element.
The account form of above-mentioned maximum feed speed is as follows:
In formula,
v0For maximum feed speed;
ε is the maximum strain speed that the distortion of GH4169 Alloy during Superplastic allows;
V is the cumulative volume of GH4169 alloy rings;
μ is the coefficient of friction of GH4169 alloy in the time of forging temperature;
v1For the rotating speed of home roll;
R is the radius of home roll;
H is the height of ring.
Claims (2)
1. a super plastic forming method for GH4169 alloy complex section annular element, is characterized in that, comprises following stepRapid:
(1) by certain specification, GH4169 alloy is cutting into bar;
(2) above-mentioned GH4169 alloy bar material is heated to 1000 ± 10 DEG C, after temperature, it is carried out to deflection is40%~50% forging deformation; Be heated again 890 DEG C of insulations after 10 hours, be warming up to 950 DEG C of insulations 3 hours,Obtain thin brilliant GH4169 alloy blank;
(3) by above-mentioned GH4169 alloy blank, be heated to after forging temperature, through jumping-up, punching, flat height, makeGH4169 alloy hoop base, the height of GH4169 alloy hoop base and the final GH4169 alloy complex section annular element being shapedHighly identical;
(4) GH4169 alloy hoop base is carried out to jacket processing, and be heated to 1080 DEG C, after insulation a period of time, proceed toLooping mill; The home roll rotating speed of looping mill is adjusted to 1.0rad/s, at the temperature of 1060 DEG C~1080 DEG C, to be 1.7mm/s to the maximumFeed speed by described GH4169 alloy hoop base through roll forming, obtain GH4169 alloy complex section annular element.
2. the super plastic forming method of GH4169 alloy complex section annular element according to claim 1, its featureBe, the account form of described maximum feed speed is as follows:
In formula, v0For maximum feed speed;
ε is the maximum strain speed that the distortion of GH4169 Alloy during Superplastic allows;
V is the cumulative volume of GH4169 alloy rings;
μ is the coefficient of friction of GH4169 alloy in the time of forging temperature;
v1For the rotating speed of home roll;
R is the radius of home roll;
H is the height of ring.
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CN1709640A (en) * | 2005-07-22 | 2005-12-21 | 武汉理工大学 | Grooved ball section annular-piece cold-ring-rolling shaping method |
CN101020949A (en) * | 2007-03-05 | 2007-08-22 | 贵州安大航空锻造有限责任公司 | Process of making ring fine crystal blank of GH4169 alloy for near constant temperature forging |
CN103111560A (en) * | 2012-12-12 | 2013-05-22 | 贵州航宇科技发展股份有限公司 | Method for rolling and forming GH4169 high-temperature alloy complicated irregular cross section annular part |
CN103350167A (en) * | 2013-06-30 | 2013-10-16 | 贵州安大航空锻造有限责任公司 | Roll forming method of 4340 H steel E-shaped ring forging |
Family Cites Families (1)
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JPH03281026A (en) * | 1990-03-29 | 1991-12-11 | Ntn Corp | Method for controlling sizing of work in ring rolling machine |
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CN1709640A (en) * | 2005-07-22 | 2005-12-21 | 武汉理工大学 | Grooved ball section annular-piece cold-ring-rolling shaping method |
CN101020949A (en) * | 2007-03-05 | 2007-08-22 | 贵州安大航空锻造有限责任公司 | Process of making ring fine crystal blank of GH4169 alloy for near constant temperature forging |
CN103111560A (en) * | 2012-12-12 | 2013-05-22 | 贵州航宇科技发展股份有限公司 | Method for rolling and forming GH4169 high-temperature alloy complicated irregular cross section annular part |
CN103350167A (en) * | 2013-06-30 | 2013-10-16 | 贵州安大航空锻造有限责任公司 | Roll forming method of 4340 H steel E-shaped ring forging |
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