CN114043166A - Manufacturing method of nickel-based superalloy asymmetric special-shaped ring forging - Google Patents
Manufacturing method of nickel-based superalloy asymmetric special-shaped ring forging Download PDFInfo
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- CN114043166A CN114043166A CN202111224686.9A CN202111224686A CN114043166A CN 114043166 A CN114043166 A CN 114043166A CN 202111224686 A CN202111224686 A CN 202111224686A CN 114043166 A CN114043166 A CN 114043166A
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 238000005242 forging Methods 0.000 title claims abstract description 62
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 34
- 229910000601 superalloy Inorganic materials 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000005096 rolling process Methods 0.000 claims abstract description 65
- 238000010438 heat treatment Methods 0.000 claims abstract description 49
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 21
- 239000000956 alloy Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000004080 punching Methods 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 238000004321 preservation Methods 0.000 claims description 30
- 238000001816 cooling Methods 0.000 claims description 14
- 238000010791 quenching Methods 0.000 claims description 9
- 230000000171 quenching effect Effects 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 abstract description 5
- 239000000243 solution Substances 0.000 description 10
- 239000006104 solid solution Substances 0.000 description 8
- 238000005728 strengthening Methods 0.000 description 5
- 238000003754 machining Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001550 time effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
The invention discloses a manufacturing method of an asymmetric special-shaped ring forging of a nickel-based superalloy, which can improve the material utilization rate, improve the production efficiency and improve the product percent of pass. The method comprises the following steps of firstly, sawing a GH4099 alloy bar raw material by using a sawing machine to obtain a blank before forging; then putting the blank before forging into a resistance furnace for first heating; then upsetting and punching the pre-forging blank after the first heating by using a hydraulic press to obtain a first annular blank; then putting the first annular blank into a resistance furnace while the first annular blank is hot for second heating; then, pre-rolling the first annular blank heated for the second time and flattening the end face by using a radial/axial ring rolling mill; then heating for the third time, namely putting the second annular blank into a resistance furnace while the second annular blank is hot, heating to the temperature of 1100 +/-10 ℃, and then preserving heat; and then carrying out special-shaped rolling forming, and rolling the second heated annular blank for the third time by using a radial/axial ring rolling mill to obtain a finished product of the nickel-based superalloy asymmetric special-shaped ring forging.
Description
Technical Field
The invention relates to the field of high-temperature alloy hot working, in particular to a method for manufacturing an asymmetric special-shaped ring forging of a nickel-based high-temperature alloy.
Background
The nickel-based alloy is an alloy with comprehensive properties such as high strength, certain oxidation and corrosion resistance and the like at a high temperature of 650-1000 ℃. The primary strengthening type may be a solid solution strengthening type, an aging strengthening type, a solid solution time-effect mixed strengthening type, or the like.
GH4099 is a high-alloying nickel-based superalloy containing alloying elements such as cobalt, tungsten, molybdenum, aluminum, titanium and the like, belongs to a solid solution time-effect mixed strengthening type nickel-based superalloy, has high heat resistance, can be used for a long time at the temperature of below 900 ℃, and has the maximum working temperature of 1000 ℃. The GH4099 alloy has stable structure and satisfactory hot-forming and welding process performance, is mainly used for manufacturing high-temperature bearing welding structural parts such as aeroengine combustion chambers, afterburners and the like, and part of large-scale structural parts can be directly used without aging treatment after solution treatment.
In the hot working forming process of the GH4099 alloy, due to the narrow deformation temperature range and the large deformation resistance, the forging defects such as cracking, incomplete filling and the like are easy to occur in the forging process. At present, for the production of GH4099 alloy special-shaped ring structural members, a plate is generally coiled and then welded into a rectangular ring member or rolled into a rectangular ring forging, then solid solution heat treatment is carried out, and finally, machining forming is carried out. The cooling mode after the solution heat treatment in the prior art is usually air cooling or water cooling to room temperature. After solid solution, the forging which is air-cooled to room temperature often has a hardness value of more than 300HB and does not meet the requirement of the hardness value of less than or equal to 300HB specified by the standard; although the hardness value of the forging which is cooled to room temperature by water after solid solution can meet the requirement that the hardness value required by the standard is less than or equal to 300HB, the general hardness value is lower, so that the tensile strength is unqualified, and the service life of the cutter and the production efficiency are greatly reduced in the subsequent machining process. Therefore, when the GH4099 alloy special-shaped ring member is produced by using the existing process, the problems of low material utilization rate, low production efficiency, low product qualification and the like exist.
Disclosure of Invention
The invention aims to: in order to solve the problems of the background technology, a manufacturing method of the nickel-based superalloy asymmetric special-shaped ring forging is provided, which can improve the material utilization rate, the production efficiency and the product percent of pass.
In order to achieve the purpose, the invention adopts the following technical scheme:
a manufacturing method of a nickel-based superalloy asymmetric special-shaped ring forging comprises the following steps:
step one, sawing a GH4099 alloy bar raw material according to a specified specification by using a sawing machine to obtain a blank before forging;
step two, heating for the first time, namely putting the blank before forging into a resistance furnace, heating to 1140 +/-10 ℃, and then preserving heat;
upsetting and punching, namely upsetting the blank before forging after the first heating to a height H0 of 0.9H-0.95H by using a hydraulic machine, wherein H is the height of the formed forge piece, and punching by using a punch with the diameter of 185 mm-195 mm to obtain a first annular blank;
step four, heating for the second time, namely putting the first annular blank into a resistance furnace while the first annular blank is hot, heating to 1140 +/-10 ℃, and then preserving heat;
and fifthly, pre-rolling and flattening the end face, pre-rolling the first annular blank heated for the second time to the inner diameter size phi 310 mm-phi 330mm by using a radial/axial ring rolling mill, upsetting the pre-rolled blank to the height H0 which is 0.9H-0.92H by using a hydraulic press, wherein H is the height of the formed forge piece, and obtaining a second annular blank.
Step six, heating for the third time, namely putting the second annular blank into a resistance furnace while the second annular blank is hot, heating to the temperature of 1100 +/-10 ℃, and then preserving heat;
and seventhly, rolling and forming in a special shape, and rolling the second heated annular blank for the third time by using a radial/axial ring rolling mill to obtain a finished product of the nickel-based high-temperature alloy asymmetric special-shaped ring forging.
On the basis of the above scheme and as a preferable scheme of the scheme: the special-shaped rolling forming of the seventh step comprises the following steps: firstly, assembling a core roller die on a mandrel of a radial/axial ring rolling mill, wherein the middle part of the core roller die is provided with a groove, two ends of the groove are respectively connected with an outer cylindrical surface of the core roller die by adopting 35-45 degrees and 45-55 degrees conical surfaces, the joint of the conical surfaces and the cylindrical surfaces is chamfered (R15-R25) mm, then sleeving a second annular blank heated for the third time outside the core roller die, starting the radial/axial ring rolling mill to enable a main roller to rotate along the clockwise direction, driving the core roller die to move towards the main roller direction by the mandrel, driving the blank and the core roller die to rotate along the anticlockwise direction by the main roller, and carrying out special-shaped rolling forming on the blank to obtain a finished product of the nickel-based high-temperature alloy asymmetric special-shaped ring forging.
On the basis of the above scheme and as a preferable scheme of the scheme: the hot state means that the surface temperature of the blank is not lower than 850 ℃.
On the basis of the above scheme and as a preferable scheme of the scheme: and in the second step, the heat preservation time is calculated according to the shortest heat preservation time which is the effective thickness multiplied by 0.7min/mm of the blank, and the longest heat preservation time which is the effective thickness multiplied by 0.9min/mm plus 180min of the blank.
On the basis of the above scheme and as a preferable scheme of the scheme: and step four and step six, the heat preservation time can be calculated according to the shortest heat preservation time of the heat preservation as the effective thickness multiplied by 0.4min/mm of the blank, and the longest heat preservation time is calculated as the effective thickness multiplied by 0.5min/mm plus 180min of the blank.
On the basis of the above scheme and as a preferable scheme of the scheme: in the first step, after blanking is finished, rounding off the two ends of the blank before forging, wherein the rounding off size is R10 mm-R20 mm.
On the basis of the above scheme and as a preferable scheme of the scheme: and after the seventh step is completed and the finished product of the nickel-based superalloy asymmetric special-shaped ring forging is obtained, the obtained finished product of the nickel-based superalloy asymmetric special-shaped ring forging is horizontally placed in an effective heating interval of a resistance heating furnace, the temperature is increased to (1090 +/-10) DEG C along with the furnace, the temperature is kept for 120-160 min, then the product is taken out of the furnace and air-cooled for 150-240 s, and then the product is placed into organic quenching liquid with the concentration of 7-9% to be cooled to the room temperature.
The invention has the beneficial effects that:
the asymmetric special-shaped ring forging of the nickel-based high-temperature alloy is manufactured through the processes of blanking, end face rounding, upsetting, punching, pre-rolling, end face flattening, special-shaped rolling forming and solution treatment, and compared with the existing rectangular rolling forming process, the method can save 20% of raw materials; by controlling the height of the rough blank, the height of the pre-rolled blank and the distance between the upper conical roller and the lower conical roller in the special-shaped rolling process, the blank deforms more uniformly in the rolling process, and local grains are not large due to high local temperature rise; by designing the special-structured die, the blank can be completely filled under a smaller deformation amount during special-shaped rolling, so that the dimensional precision of the special-shaped ring forging can be well ensured; after solid solution, air cooling is carried out for 150-240 s, and then quenching liquid is transferred to be cooled to room temperature, so that the mechanical property, the mechanical processing property and the like of the forge piece are better.
Drawings
FIG. 1 is a schematic cross-sectional view of a core roll mold of the present invention;
FIG. 2 is a schematic rolling diagram of the asymmetric special-shaped ring forging made of the nickel-based superalloy;
FIG. 3 is a schematic size diagram of the asymmetric special-shaped ring forging made of the nickel-based superalloy.
In the figure: 01-groove, 02-core roller nut, 03-second annular blank, 04-main roller, 05-core roller die, 06-mandrel, 07-upper conical roller, 08-core roller ring pad, 09-lower conical roller and 10-annular bulge.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-3, the manufacturing method of the asymmetric special-shaped ring forging of the nickel-based superalloy is characterized in that the asymmetric special-shaped ring forging of the nickel-based superalloy is manufactured through the processes of blanking, end face rounding, upsetting, punching, pre-rolling, end face flattening, special-shaped roll forming and solution treatment, and compared with the existing rectangular roll forming process, the raw material can be saved by 20%; by controlling the height of the rough blank, the height of the pre-rolled blank and the distance between the upper conical roll 07 and the lower conical roll 09 in the special-shaped rolling process, the blank deforms more uniformly in the rolling process, and local grains are not large due to high local temperature rise; by designing the special-structured die, the blank can be completely filled under a smaller deformation amount during special-shaped rolling, so that the dimensional precision of the special-shaped ring forging can be well ensured; after solid solution, air cooling is carried out for 150-240 s, and then quenching liquid is transferred to be cooled to room temperature, so that the mechanical property, the mechanical processing property and the like of the forge piece are better. The method comprises at least the following embodiments.
Example 1
Firstly, blanking: the GH4099 alloy bar raw material is sawed according to the specified specification by using a sawing machine, and then the two ends of the blank are rounded off by using a lathe or an angle grinder R16mm, so that the blank before forging is obtained.
Later, first heating: and putting the blank before forging into a resistance furnace, heating to 1140 +/-10 ℃, and then preserving heat. Further, the shortest heat preservation time is calculated according to the effective thickness (mm) multiplied by 0.7min/mm of the blank, and the longest heat preservation time is calculated according to the effective thickness (mm) multiplied by 0.9min/mm +180min of the blank.
Then, upsetting and punching: upsetting the blank before forging after the first heating to a height H0 of 0.91H, which is the height of the forged piece after forming, by using a 3000T oil press, and punching by using a punch with the diameter of 185mm to obtain an annular first annular blank.
Then, second heating: and (3) putting the first annular blank into a resistance furnace while the first annular blank is hot, heating to 1140 +/-10 ℃, and then preserving heat. Further, the hot state means that the surface temperature of the blank is more than or equal to 850 ℃, the heat preservation is carried out, the shortest heat preservation time is calculated according to the effective thickness (mm) multiplied by 0.4min/mm of the blank, and the longest heat preservation time is calculated according to the effective thickness (mm) multiplied by 0.5min/mm +180min of the blank.
Then, pre-rolling, flattening the end face: the second heated first annular billet was pre-rolled to an inside diameter dimension of phi 320mm using a phi 2500mm ring mill, and the pre-rolled billet was upset using a 3000T oil press to a height H0 of 0.92H, which is the height of the formed forging, to obtain an annular second annular billet.
Then, heating for the third time: and (3) putting the second annular blank into a resistance furnace while the second annular blank is hot, heating to 1100 +/-10 ℃, and then preserving heat. Further, the hot state means that the surface temperature of the blank is more than or equal to 850 ℃, the heat preservation is carried out, the shortest heat preservation time is calculated according to the effective thickness (mm) multiplied by 0.4min/mm of the blank, and the longest heat preservation time is calculated according to the effective thickness (mm) multiplied by 0.5min/mm +180min of the blank.
Then, special-shaped rolling forming:
a) assembling a core roller die 05 on a mandrel 06 of a phi 2500mm ring rolling mill, wherein the middle part of the core roller die 05 is provided with a groove 01, two ends of the groove 01 are respectively connected with an outer cylindrical surface of the core roller die 05 by conical surfaces of 35 degrees and 45 degrees, and the joint of the conical surfaces and the cylindrical surfaces is provided with a fillet R20 mm.
b) Sleeving the second annular blank 03 heated for the third time outside the core roller die 05, starting the radial/axial ring rolling mill to enable the main roller 04 to rotate clockwise, driving the core roller die 05 to move towards the main roller 04 by the mandrel 06, driving the second annular blank 03 and the core roller die to rotate anticlockwise by the main roller 04, and performing special-shaped rolling forming on the second annular blank 03 to obtain a nickel-based high-temperature alloy asymmetric special-shaped ring forging finished product, wherein the finished product is shown in fig. 3. The assembly relationship of the special-shaped rolling process die and the second annular blank 03 is shown in the attached figure 2. And controlling the distance between the upper conical roll 09 and the lower conical roll 09 to be H all the time in the special-shaped rolling process, wherein H is the height of the formed forge piece.
And finally, carrying out solution heat treatment, namely horizontally placing the finished product of the nickel-based superalloy asymmetric special-shaped ring forging in an effective heating interval of a resistance heating furnace, heating to 1090 +/-10 ℃ along with the furnace, keeping the temperature for 125min, taking out of the furnace, air-cooling for 180s, and then putting into organic quenching liquid with the concentration of 7-9% to cool to room temperature.
Example 2
Firstly, blanking and rounding: the GH4099 alloy bar material is sawed by a sawing machine according to the specified specification, and the two ends of the blank are rounded off by a lathe or an angle grinder R25mm to obtain the blank before forging.
Then, first heating: and putting the blank before forging into a resistance furnace, heating to 1140 +/-10 ℃, and then preserving heat. Further, the shortest heat preservation time is calculated according to the effective thickness (mm) multiplied by 0.7min/mm of the blank, and the longest heat preservation time is calculated according to the effective thickness (mm) multiplied by 0.9min/mm +180min of the blank.
Then, upsetting and punching: and upsetting the blank before forging after the first heating to a height H0 of 0.95H by using a 3000t oil press, wherein H is the height of the forged piece after forming, and punching by using a punch with the diameter of 185mm to obtain an annular first annular blank.
Then, second heating: and (3) putting the first annular blank into a resistance furnace while the first annular blank is hot, heating to 1140 +/-10 ℃, and then preserving heat. Further, the hot state means that the surface temperature of the blank is more than or equal to 850 ℃, the heat preservation is carried out, the shortest heat preservation time is calculated according to the effective thickness (mm) multiplied by 0.4min/mm of the blank, and the longest heat preservation time is calculated according to the effective thickness (mm) multiplied by 0.5min/mm +180min of the blank.
Then, pre-rolling, flattening the end face: and (3) pre-rolling the first annular blank heated for the second time to the inner diameter size phi 320 mm-phi 330mm by using a phi 2500mm ring rolling mill, upsetting the pre-rolled blank to the height H0 which is 0.9H by using a 3000T oil press, wherein H is the height of the formed forge piece, and obtaining an annular second annular blank.
Then, heating for the third time: and (3) putting the second annular blank into a resistance furnace while the second annular blank is hot, heating to 1100 +/-10 ℃, and then preserving heat. Further, the hot state means that the surface temperature of the blank is more than or equal to 850 ℃, the heat preservation is carried out, the shortest heat preservation time is calculated according to the effective thickness (mm) multiplied by 0.4min/mm of the blank, and the longest heat preservation time is calculated according to the effective thickness (mm) multiplied by 0.5min/mm +180min of the blank.
Then, special-shaped rolling forming:
a) assembling a core roller die 05 on a mandrel 06 of a phi 2500mm diameter/axial ring rolling mill, wherein the middle part of the core roller die 05 is provided with a groove 01, two ends of the groove 01 are respectively connected with the outer cylindrical surface of the core roller die 05 by adopting conical surfaces of 45 degrees and 55 degrees, and the joint of the conical surfaces and the cylindrical surfaces is chamfered R25 mm.
b) Sleeving the second annular blank 03 heated for the third time outside the core roller die 05, starting the radial/axial ring rolling mill to enable the main roller 04 to rotate clockwise, driving the core roller die 05 to move towards the main roller 04 by the mandrel 06, driving the second annular blank 03 and the core roller die to rotate anticlockwise by the main roller 04, and performing special-shaped rolling forming on the second annular blank 03 to obtain a nickel-based high-temperature alloy asymmetric special-shaped ring forging finished product, wherein the finished product is shown in fig. 3. The assembly relationship of the special-shaped rolling process die and the second annular blank 03 is shown in the attached figure 2. And controlling the distance between the upper conical roll 09 and the lower conical roll 09 to be H all the time in the special-shaped rolling process, wherein H is the height of the formed forge piece.
And finally, carrying out solution heat treatment again, namely horizontally placing the finished product of the asymmetric special-shaped ring forging of the nickel-based superalloy in an effective heating interval of a resistance heating furnace, heating to 1090 +/-10 ℃ along with the furnace, preserving the heat for 150min, taking out of the furnace, carrying out air cooling for 220s, and then putting the product into organic quenching liquid with the concentration of 7-9% to cool to room temperature.
The structure of the nickel-based superalloy asymmetric special-shaped ring forging product is shown in figure 3, the core roller die 05 is shown in figure 1, the assembly relationship during the rolling process and the rolling process is shown in figure 2, the core roller die 05 is sleeved on the mandrel 06 in series, and the core roller die 05 and the mandrel 06 are connected into a whole through the matching of the leaning table on the mandrel 06 and the core roller ring pad 08, and the core roller nut 02 and the mandrel 06 are in threaded fit. During rolling, the two sides of the second annular blank 03 are provided with the rotating upper conical roller 07 and the rotating lower conical roller 09 to clamp the second annular blank 03 and drive the second annular blank 03 to rotate, and the second annular blank 03 is rolled and formed by matching the core roller die 05 with the main roller 04 during rotation, so that the annular bulge 10 of the nickel-based superalloy asymmetric special-shaped ring forging is obtained.
It is noted that in the prior art, there are two related comparison techniques, the ratio is:
comparison 1: the publication number CN112808911A is a patent application of a machining method of a GH4169 disc shaft integrated forging;
comparison 2: the publication number CN200810068723.X is a patent application of a rolling forming method of a nickel-based superalloy special-shaped ring forging.
Compared with the comparison 2, the invention has the following differences that the diameter of the special-shaped ring piece in the patent document 2 is relatively large, the deformation amount can reach 40% -45% when the special-shaped ring piece is subjected to repeated rectangular rolling before the special-shaped rolling, the ring rolling is relatively small (20% -30%) in the patent, the rectangular rolling deformation amount and the special-shaped rolling deformation amount before the special-shaped rolling are both small, and the special-shaped ring piece is difficult to be completely filled in the rolling forming process under the condition of small rolling deformation amount, so that a die with a specific angle is designed in the patent, the blank is convenient to be completely filled, the size precision of a forging piece can be better ensured, and the material utilization rate is improved to the maximum extent.
Compared with the comparative patent 1, the forming method of the patent document 1 is free forging forming of a tire mold, while the patent adopts special-shaped ring rolling forming, and the two forming modes are essentially different.
In the patent, after the special-shaped ring piece is formed and subjected to solution heat treatment, the process of air cooling and quenching graded cooling is adopted, and the process is different from the process of air cooling or quenching liquid single-stage cooling after the existing high-temperature alloy is subjected to solution heat treatment, so that the structure and the performance of the forged piece can be well controlled by adopting the air cooling and the quenching liquid cooling, and the comprehensive performance of the forged piece is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. The manufacturing method of the nickel-based superalloy asymmetric special-shaped ring forging is characterized by comprising the following steps of:
step one, sawing a GH4099 alloy bar raw material according to a specified specification by using a sawing machine to obtain a blank before forging;
step two, heating for the first time, namely putting the blank before forging into a resistance furnace, heating to 1140 +/-10 ℃, and then preserving heat;
upsetting and punching, namely upsetting the blank before forging after the first heating to a height H0 of 0.9H-0.95H by using a hydraulic machine, wherein H is the height of the formed forge piece, and punching by using a punch with the diameter of 185 mm-195 mm to obtain a first annular blank;
step four, heating for the second time, namely putting the first annular blank into a resistance furnace while the first annular blank is hot, heating to 1140 +/-10 ℃, and then preserving heat;
and fifthly, pre-rolling and flattening the end face, pre-rolling the first annular blank heated for the second time to the inner diameter size phi 310 mm-phi 330mm by using a radial/axial ring rolling mill, upsetting the pre-rolled blank to the height H0 which is 0.9H-0.92H by using a hydraulic press, wherein H is the height of the formed forge piece, and obtaining a second annular blank.
Step six, heating for the third time, namely putting the second annular blank into a resistance furnace while the second annular blank is hot, heating to the temperature of 1100 +/-10 ℃, and then preserving heat;
and seventhly, rolling and forming in a special shape, and rolling the second heated annular blank for the third time by using a radial/axial ring rolling mill to obtain a finished product of the nickel-based high-temperature alloy asymmetric special-shaped ring forging.
2. The manufacturing method of the asymmetric special-shaped ring forging of nickel-based superalloy according to claim 1, wherein the special-shaped rolling forming in the seventh step comprises: firstly, assembling a core roller die on a mandrel of a radial/axial ring rolling mill, wherein the middle part of the core roller die is provided with a groove, two ends of the groove are respectively connected with an outer cylindrical surface of the core roller die by adopting 35-45 degrees and 45-55 degrees conical surfaces, the joint of the conical surfaces and the cylindrical surfaces is chamfered (R15-R25) mm, then sleeving a second annular blank heated for the third time outside the core roller die, starting the radial/axial ring rolling mill to enable a main roller to rotate along the clockwise direction, driving the core roller die to move towards the main roller direction by the mandrel, driving the blank and the core roller die to rotate along the anticlockwise direction by the main roller, and carrying out special-shaped rolling forming on the blank to obtain a finished product of the nickel-based high-temperature alloy asymmetric special-shaped ring forging.
3. The method for manufacturing the asymmetric special-shaped ring forging of the nickel-based superalloy according to claim 1, wherein the hot state means that the surface temperature of the blank is not lower than 850 ℃.
4. The manufacturing method of the nickel-based superalloy asymmetric special-shaped ring forging according to claim 1, wherein the heat preservation time in the second step is calculated according to the shortest heat preservation time of the effective thickness of the blank multiplied by 0.7min/mm, and the longest heat preservation time is calculated according to the effective thickness of the blank multiplied by 0.9min/mm +180 min.
5. The manufacturing method of the nickel-based superalloy asymmetric special-shaped ring forging according to claim 1, wherein the heat preservation time in the fourth step and the sixth step is calculated according to the shortest heat preservation time of the heat preservation as the effective thickness of the blank x 0.4min/mm, and the longest heat preservation time is calculated as the effective thickness of the blank x 0.5min/mm +180 min.
6. The manufacturing method of the nickel-based superalloy asymmetric special-shaped ring forging according to claim 1, wherein in the first step, rounding is performed on two ends of a blank before forging after blanking is completed, and the rounding is R10 mm-R20 mm.
7. The manufacturing method of the asymmetric special-shaped ring forging of nickel-base superalloy according to claim 1, wherein after step seven is completed and a finished product of the asymmetric special-shaped ring forging of nickel-base superalloy is obtained, the obtained finished product of the asymmetric special-shaped ring forging of nickel-base superalloy is placed flatly in an effective heating interval of a resistance heating furnace, the temperature is raised to (1090 +/-10) ° c along with the furnace, the temperature is kept for 120min to 160min, then the product is taken out of the furnace for air cooling for 150s to 240s, and then the product is placed into an organic quenching liquid with the concentration of 7% -9% to be cooled to room temperature.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111224686.9A CN114043166A (en) | 2021-10-21 | 2021-10-21 | Manufacturing method of nickel-based superalloy asymmetric special-shaped ring forging |
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| CN202111224686.9A CN114043166A (en) | 2021-10-21 | 2021-10-21 | Manufacturing method of nickel-based superalloy asymmetric special-shaped ring forging |
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| CN116900649A (en) * | 2023-09-11 | 2023-10-20 | 陕西长羽航空装备股份有限公司 | Ring piece forming method of aero-engine difficult-to-deform material |
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