CN102873241A - GH4145 alloy ribbon manufacturing method - Google Patents
GH4145 alloy ribbon manufacturing method Download PDFInfo
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- CN102873241A CN102873241A CN2012103497303A CN201210349730A CN102873241A CN 102873241 A CN102873241 A CN 102873241A CN 2012103497303 A CN2012103497303 A CN 2012103497303A CN 201210349730 A CN201210349730 A CN 201210349730A CN 102873241 A CN102873241 A CN 102873241A
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Abstract
The invention discloses a GH4145 alloy ribbon manufacturing method. The method improves the fatigue resistance of the GH4145 alloy, and in addition, as an original blank for being cast or forged is manufactured into a forging stock by the process of upsetting-drawing and rolling, and then formed by nearly isothermal forging, grains are refined and the grain size is improved. According to the method, depending on consolidation powder to refine the grains and enhance the forging strength is omitted, so that the forging cost is greatly reduced.
Description
Technical field
The present invention relates to a kind of manufacture method of high temperature alloy.
Background technology
The GH4145 alloy mainly is with γ " carries out the nickel base superalloy of ageing strengthening; have good corrosion-resistant and antioxygenic property below 980 ℃; have higher intensity below 800 ℃; have preferably anti-relaxation property below 540 ℃, also having simultaneously good forming property and welding performance mutually.
Because this alloy has good antifatigue, radioresistance, anti-oxidant, decay resistance, and good processing characteristics, welding performance and long-term structure stability, in aerospace, nuclear energy, petroleum industry, in the said temperature scope, obtained to use very widely.Use this alloy can make the parts of various different purposes and shape, such as rod, cake, ring, plate, band, silk, pipe etc.The GH4145 alloy can be used for making aero-engine and is working below 800 ℃ and higher anti-lax plane spring and the helical spring of desired strength.Also can be used for making the parts such as gas-turbine turbo blade.
Usually, the chemical composition of GH4145 alloy comprises standard analysis, high-quality composition and high-purity composition.In order to reduce the quantity of tired source and increase hardening constituent, a kind of method is to increase the high-quality composition on the basis of standard analysis, namely increases niobium and reduces carbon, thereby reduce the quantity of niobium carbide, improve anti-fatigue performance and the strength of materials, reduce simultaneously objectionable impurities and gas content.Although can carry heavy alloyed anti-fatigue performance by increasing the high-quality composition, the method cost is higher, is unfavorable for need of production.Therefore need a kind of alloy manufacture method, when improving anti-fatigue performance, reduce cost.
Summary of the invention
The manufacture method of GH4145 alloy band of the present invention comprises the steps:
The first step: after the original bar of GH4145 alloy being heated to 1015 ℃～1025 ℃ initial temperature, after upsetting pull is long, obtain the forging stock of rectangle;
Second step: described forging stock is heated to 1015 ℃～1025 ℃ initial temperature, simultaneously the forging die in the forging press is heated to 960 ℃～975 ℃ initial temperature;
The 3rd step: the forging stock after will heating is packed into and is positioned in the forging die in the forging press, utilizes the heating furnace of forging press that described forging stock and forging die are heated;
The 4th step: in the initial temperature scope of forging stock and forging die, the forging stock excellent suitability for press forming, obtain tubular forging by forging press;
The 5th step: place pure iron yoke-permanent magnets assembly to carry out magnetic-field heat treatment tubular forging, magnetic field intensity is 0.75～0.95T; The heating-up temperature of described magnetic-field heat treatment is 365～465K, and temperature retention time is 20～30 minutes; The axial direction of tubular forging is parallel to the magnetic direction of permanent magnet assembly during described magnetic-field heat treatment.
In a preferred embodiment, the heating-up temperature of the original bar of GH4145 alloy is preferred 1025 ℃;
Preferred 1025 ℃ of the heating-up temperature of forging stock;
The heating-up temperature of forging die is preferred 975 ℃ in the forging press;
Magnetic field intensity is preferably 0.85T;
The heating-up temperature of magnetic-field heat treatment is preferably 395～425K;
Temperature retention time is preferably 25 minutes.
Describe the present invention below in conjunction with specific embodiment, but not as a limitation of the invention.
The specific embodiment
The manufacture method of GH4145 alloy band of the present invention comprises the steps:
The first step: after the original bar of GH4145 alloy being heated to 1015 ℃～1025 ℃ initial temperature, after upsetting pull is long, obtain the forging stock of rectangle.
GH4145 alloy bar material by the blanking of disk forge piece specification is heated to 1015 ℃～1025 ℃ initial temperature in forge furnace, preferred temperature is 1025 ℃, and then jumping-up is to certain altitude on forging press, and pulling is to former height again; Again punching behind the heating and upsetting; After the blank heating with holes on elongator roll off become the ring base of disk forge piece to obtain GH4145 alloy forging stock.The grain size of forging stock can reach 8 grades of U.S. ASTM standards.
Second step: described forging stock is heated to 1015 ℃～1025 ℃ initial temperature, simultaneously the forging die in the forging press is heated to 960 ℃～975 ℃ initial temperature.
Heating forging stock and forging die.Forging stock is put into the initial temperature that forge furnace is heated to 1015 ℃～1025 ℃, and preferred temperature is 1025 ℃; Anvil tool is heated to 960 ℃～975 ℃ initial temperature on unlatching heating furnace handle under the matched moulds state of forging die simultaneously, and preferred temperature is 960 ℃.Forging die in forging process the forging die initial temperature and strain rate under the yield strength that has need greater than more than 3 times of forging stock flow stress.
The 3rd step: the forging stock after will heating is packed into and is positioned in the forging die in the forging press, utilizes the heating furnace of forging press that described forging stock and forging die are heated.
Forging stock dress mould location.Unload heat insulation loop, open forging press, slide block is along the guide pillar upward sliding and pass through upper anvil with the upper joint disengaging anvil tool of upper forging die and heating furnace and the certain height of lower joint of heating furnace, closes forging press.Forging stock is positioned to load onto heat insulation loop between the upper anvil tool, finishes the dress mould location of forging stock.Heating furnace stopped heating not in this step.
The 4th step: in the initial temperature scope of forging stock and forging die, the forging stock excellent suitability for press forming, obtain tubular forging by forging press.
Heating forging stock and upper anvil tool.Utilize heating furnace that forging stock and upper anvil tool are heated, cause the thermal loss of forging stock with minimizing because of the temperature difference between upper anvil tool and the forging stock, thereby forging stock is remained in forging process in the temperature range of regulation.
Open forging press, slide block makes upper anvil tool the forging stock excellent suitability for press forming along the guide pillar down sliding, obtains tubular forging, closes forging press.Forging process carries out in air, and forging pressure is 55MN～65MN, and the forging strain rate of forging stock in the forging and pressing process is 0.01s-1～0.05s-1, preferred 0.03s-1, and described strain rate is determined by the movement velocity of slide block.In this process, heating furnace heats upper anvil tool and forging stock all the time.
Tubular forging is carried out water-cooled to be processed.Take-off pipe shape Forging from forging press carries out water-cooled and processes under the forging attitude.The grain size of tubular forging can reach 11 grades of U.S. ASTM standards.
The 5th step: place pure iron yoke-permanent magnets assembly to carry out magnetic-field heat treatment tubular forging, magnetic field intensity is 0.75～0.95T; The heating-up temperature of described magnetic-field heat treatment is 365～465K, and temperature retention time is 20～30 minutes; The axial direction of tubular forging is parallel to the magnetic direction of permanent magnet assembly during described magnetic-field heat treatment.
Magnetic field intensity is preferably 0.85T;
The heating-up temperature of magnetic-field heat treatment is preferably 395～425K;
Temperature retention time is preferably 25 minutes.
Experimental data shows that all anti-fatigue performances through the GH4145 alloy of vertical mode magnetic-field heat treatment all have raising in various degree, reach as high as 16%, and better than the effect of shrend with air cooling after the heating of T1 temperature.This shows the GH4145 alloy is carried out magnetic-field heat treatment, so that produced the preferentially arrangement of martensitic twin variant in the alloy.
In addition, the present invention because casting or the original blank that forges added by upsetting pull is shaped by near isothermal forging after roll off technique is made into forging stock again, refinement crystal grain, improved grain size.The method can not rely on the intensity that adopts the consolidated powder blank to come crystal grain thinning and improve forging, thereby has greatly reduced the forging cost.
Certainly; the present invention also can have other various embodiments; in the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (7)
1. the manufacture method of a GH4145 alloy band comprises the steps, it is characterized in that, the method comprises the steps,
The first step: after the original bar of GH4145 alloy being heated to 1015 ℃～1025 ℃ initial temperature, after upsetting pull is long, obtain the forging stock of rectangle;
Second step: described forging stock is heated to 1015 ℃～1025 ℃ initial temperature, simultaneously the forging die in the forging press is heated to 960 ℃～975 ℃ initial temperature;
The 3rd step: the forging stock after will heating is packed into and is positioned in the forging die in the forging press, utilizes the heating furnace of forging press that described forging stock and forging die are heated;
The 4th step: in the initial temperature scope of forging stock and forging die, the forging stock excellent suitability for press forming, obtain tubular forging by forging press;
The 5th step: place pure iron yoke-permanent magnets assembly to carry out magnetic-field heat treatment tubular forging, magnetic field intensity is 0.75～0.95T; The heating-up temperature of described magnetic-field heat treatment is 365～465K, and temperature retention time is 20～30 minutes; The axial direction of tubular forging is parallel to the magnetic direction of permanent magnet assembly during described magnetic-field heat treatment.
2. the method for claim 1, wherein
The heating-up temperature of the original bar of described GH4145 alloy is 1025 ℃.
3. such as the described method of claim 1-2, wherein,
The heating-up temperature of described forging stock is 1025 ℃.
4. such as the described method of claim 1-3, wherein,
The heating-up temperature of forging die is 975 ℃ in the described forging press.
5. such as the described method of claim 1-4, wherein,
Described magnetic field intensity is 0.85T.
6. such as the described method of claim 1-5, wherein,
The heating-up temperature of described magnetic-field heat treatment is 395～425K.
7. such as the described method of claim 1-6, wherein,
Described temperature retention time is 25 minutes.
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| CN2012103497303A CN102873241A (en) | 2012-09-20 | 2012-09-20 | GH4145 alloy ribbon manufacturing method |
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| CN2012103497303A CN102873241A (en) | 2012-09-20 | 2012-09-20 | GH4145 alloy ribbon manufacturing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111148583A (en) * | 2017-09-29 | 2020-05-12 | 日立金属株式会社 | Method for producing hot forged material |
| US11278953B2 (en) | 2017-09-29 | 2022-03-22 | Hitachi Metals, Ltd. | Method for producing hot forged material |
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| CN101036931A (en) * | 2007-03-05 | 2007-09-19 | 贵州安大航空锻造有限责任公司 | Near-isothermal forging method of GH4169 alloy disc-shaped forging in air |
| US20090032151A1 (en) * | 2002-03-04 | 2009-02-05 | Sumitomo (Sei) Steel Wire Corp. | Magnesium base alloy pipes and method of manufacturing the same |
| CN101623719A (en) * | 2009-08-10 | 2010-01-13 | 江苏银环精密钢管股份有限公司 | Method for manufacturing stainless steel heat transfer pipe of nuclear heat exchanger |
| JP2011255401A (en) * | 2010-06-09 | 2011-12-22 | Komatsu Ltd | Method of manufacturing steel pipe for cylinder |
| CN102441585A (en) * | 2011-11-28 | 2012-05-09 | 苏州有色金属研究院有限公司 | Preparation method of aluminium alloy composite pipe |
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- 2012-09-20 CN CN2012103497303A patent/CN102873241A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090032151A1 (en) * | 2002-03-04 | 2009-02-05 | Sumitomo (Sei) Steel Wire Corp. | Magnesium base alloy pipes and method of manufacturing the same |
| CN101036931A (en) * | 2007-03-05 | 2007-09-19 | 贵州安大航空锻造有限责任公司 | Near-isothermal forging method of GH4169 alloy disc-shaped forging in air |
| CN101623719A (en) * | 2009-08-10 | 2010-01-13 | 江苏银环精密钢管股份有限公司 | Method for manufacturing stainless steel heat transfer pipe of nuclear heat exchanger |
| JP2011255401A (en) * | 2010-06-09 | 2011-12-22 | Komatsu Ltd | Method of manufacturing steel pipe for cylinder |
| CN102441585A (en) * | 2011-11-28 | 2012-05-09 | 苏州有色金属研究院有限公司 | Preparation method of aluminium alloy composite pipe |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111148583A (en) * | 2017-09-29 | 2020-05-12 | 日立金属株式会社 | Method for producing hot forged material |
| US11278953B2 (en) | 2017-09-29 | 2022-03-22 | Hitachi Metals, Ltd. | Method for producing hot forged material |
| CN111148583B (en) * | 2017-09-29 | 2022-04-01 | 日立金属株式会社 | Method for producing hot forged material |
| US11358209B2 (en) | 2017-09-29 | 2022-06-14 | Hitachi Metals, Ltd. | Method for producing hot forged material |
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Application publication date: 20130116 |