CN112122541A - Method for forming asymmetric complex-section special-shaped ring - Google Patents
Method for forming asymmetric complex-section special-shaped ring Download PDFInfo
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- CN112122541A CN112122541A CN202010882702.2A CN202010882702A CN112122541A CN 112122541 A CN112122541 A CN 112122541A CN 202010882702 A CN202010882702 A CN 202010882702A CN 112122541 A CN112122541 A CN 112122541A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/76—Making machine elements elements not mentioned in one of the preceding groups
- B21K1/761—Making machine elements elements not mentioned in one of the preceding groups rings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H1/00—Making articles shaped as bodies of revolution
- B21H1/06—Making articles shaped as bodies of revolution rings of restricted axial length
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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
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
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Abstract
The invention provides a method for forming an asymmetric complex-section special-shaped ring, which mainly comprises the following steps: blanking, punching, direct rolling, flanging, high rotating pressure, special-shaped pre-rolling, special-shaped final rolling, solution heat treatment, aging heat treatment, testing and inspection. Through the mode, the technical bottleneck that the asymmetric forging structure design and forming of parts with complex sections cannot be realized can be solved, and the material utilization rate and the comprehensive performance of products are greatly improved.
Description
Technical Field
The invention relates to the field of manufacturing of aviation parts, in particular to a method for forming an asymmetric complex-section special-shaped ring.
Background
The material of the forging of the aero-engine is mostly noble metal, and in order to improve the utilization rate of the raw material of the forging, the forging structure is generally subjected to profiling design according to the structure of a part, but due to the material flowability and some limitations of the ring rolling process, a plurality of parts with complex structures can only be subjected to simple profiling design. For example, the left end and the right end of a support ring part of an aero-engine of a certain model (as shown in figure 1 below) are asymmetric in cross-sectional structure, and the difference of the outer diameters of the two ends is large. Due to the technical limitation, the conventional forging design is shown in figure 2, the left end and the right end of the forging section structure are symmetrically designed, and the outer diameter special-shaped depth (A value) is shallow in consideration of the filling problem caused by material flow.
The existing manufacturing and processing technology has the following defects: 1. the profiling degree is low, and the material utilization rate is low; 2. the subsequent machining amount is large, and the production efficiency is low; 3. the integrity of the product organization streamline is greatly cut off in the subsequent machining process, and the service life of the product is influenced.
Disclosure of Invention
In order to solve the problems, the invention provides a method for forming an asymmetric complex-section special-shaped ring, which can solve the technical bottleneck that a complex-section part cannot realize asymmetric forging structure design and forming, and greatly improve the material utilization rate and the comprehensive performance of a product.
The main content of the invention comprises: a method for forming an asymmetric complex-section special-shaped ring mainly comprises the following steps:
s1, blanking: cutting according to the process requirements;
s2, punching: heating the blank by a high-temperature gas furnace to 1060-1120 ℃, preserving heat for 2-4.5 hours, taking out the blank from the high-temperature gas furnace, transporting the blank to a press, and upsetting and punching the blank;
s3, straight rolling: heating the punched ring forging to 1060-1120 ℃ by using a high-temperature gas furnace, preserving heat for 1-3 hours, taking out the forging from the high-temperature gas furnace, and transferring the forging to a ring rolling mill for multi-fire direct rolling;
s4, flanging: heating the ring forging to 960-1020 ℃ by adopting a high-temperature gas furnace, preserving heat for 0.5-2.5 hours, and transferring to a press for molding;
s5, rotating pressure is high: heating the ring forging to 960-1020 ℃ by adopting a high-temperature gas furnace, preserving heat for 0.5-2 hours, transferring to a press for molding, performing multi-pass rotation on two ends of the ring forging by adopting a narrow table top on an upper table top, performing local high-pressure partial stacking, molding the ring forging with thick two ends and thin middle, and accurately distributing raw materials at each part of the ring forging;
s6, special-shaped pre-rolling: heating the ring forging to 960-1020 ℃ by adopting a high-temperature gas furnace, preserving the heat for 0.5-2 hours, and transferring to a ring rolling mill for ring rolling;
s7, special-shaped finish rolling: heating the ring forging to 960-1020 ℃ by adopting a high-temperature gas furnace, preserving heat for 0.5-2 hours, transferring to a ring rolling mill for ring rolling to obtain an asymmetric special-shaped ring forging with a final design shape;
s8, solution heat treatment: carrying out heat treatment on the ring forging by adopting a heat treatment furnace, keeping the temperature at 950-1000 ℃ for 1-2 hours, and then discharging from the furnace for air cooling or water cooling;
s9, aging heat treatment: carrying out heat treatment on the ring forging by adopting a heat treatment furnace, keeping the temperature of 720-780 ℃ for 4-6 hours, then cooling the furnace to 620-650 ℃, keeping the temperature of 620-650 ℃ for 1 hour, then discharging the ring forging out of the furnace and air cooling;
s10, testing: testing the product sample to verify whether the product sample meets the specification requirements;
s11, checking: and (5) checking according to the required size of the drawing.
Preferably, the method further comprises the following steps:
s1, blanking: cutting according to the process requirements;
s2, punching: heating the blank by a high-temperature gas furnace to 1080-1100 ℃, preserving heat for 2.5-3 hours, taking out the blank from the high-temperature gas furnace, transporting the blank to a press, and upsetting and punching the blank;
s3, straight rolling: heating the punched ring forging to 1080-1100 deg.c with high temperature gas furnace, maintaining for 1.5-2.5 hr, taking out the forging from the high temperature gas furnace and transferring to a ring rolling machine for several times of direct rolling;
s4, flanging: heating the ring forging to 980-1000 ℃ by using a high-temperature gas furnace, preserving heat for 1-2 hours, and transferring to a press for molding;
s5, rotating pressure is high: heating the ring forging to 980-1000 ℃ by using a high-temperature gas furnace, preserving heat for 1-1.5 hours, transferring to a press for molding, performing multi-pass rotation on two ends of the ring forging by using a narrow table top on an upper table top, performing local high-pressure partial stacking, molding the ring forging with thick two ends and thin middle, and accurately distributing raw materials at each part of the ring forging;
s6, special-shaped pre-rolling: heating the ring forging to 980-1000 ℃ by using a high-temperature gas furnace, preserving the heat for 1-1.5 hours, and transferring to a ring rolling mill for ring rolling;
s7, special-shaped finish rolling: heating the ring forging to 980-1000 ℃ by using a high-temperature gas furnace, preserving heat for 1-1.5 hours, transferring to a ring rolling mill for ring rolling to obtain an asymmetric special-shaped ring forging with a final design shape;
s8, solution heat treatment: carrying out heat treatment on the ring forging by using a heat treatment furnace, keeping the temperature at 960-980 ℃ for 1.5-2 hours, and then discharging the ring forging from the furnace for air cooling or water cooling;
s9, aging heat treatment: carrying out heat treatment on the ring forging by adopting a heat treatment furnace, keeping the temperature at 740-760 ℃ for 4.5-5.5 hours, cooling the ring forging to 630-640 ℃, keeping the temperature at 630-640 ℃ for 1 hour, and then discharging the ring forging out of the furnace for air cooling;
s10, testing: testing the product sample to verify whether the product sample meets the specification requirements;
s11, checking: and (5) checking according to the required size of the drawing.
The invention has the beneficial effects that:
1. according to the support ring part structure, an asymmetric complex-section special-shaped ring forging piece which is close to the part outline is designed, two ends of the forging piece section are in asymmetric structures, the profiling design degree is high, the utilization rate of raw materials is improved, and the production cost of products is reduced;
2. the method adopts a combined forming mode of direct rolling, flanging, spinning local stacking and special-shaped ring rolling to form the asymmetric complex-section special-shaped ring forging, so that each area of the forging can be well filled with the special-shaped ring forging, and the product yield is high;
3. the flanging forming process is adopted to guide the deformation flow direction of the material and prevent the material from flowing to an unexpected direction;
4. the local stacking of the blank is realized by adopting a forming mode with high rotary local pressure, the accurate positioning distribution of the material is realized, and the defect of insufficient filling caused by local material shortage in the subsequent ring rolling process is prevented.
Drawings
FIG. 1 is a schematic diagram of a prior art product;
FIG. 2 is a schematic structural view of a conventional forging of the prior art;
FIG. 3 is a schematic structural view of a special-shaped ring forging in the invention;
FIG. 4 is a flow chart of the overall process of the present invention.
Detailed Description
The technical scheme protected by the invention is specifically explained in the following by combining the attached drawings.
Example 1
A method for forming an asymmetric complex-section special-shaped ring mainly comprises the following steps:
s1, blanking: cutting according to the process requirements;
s2, punching: heating the blank by a high-temperature gas furnace to 1060 ℃, preserving heat for 2 hours, taking out the blank from the high-temperature gas furnace, transporting the blank to a press, and upsetting and punching the blank;
s3, straight rolling: heating the punched ring forging to 1060 ℃ by using a high-temperature gas furnace, preserving heat for 1 hour, taking out the forging from the high-temperature gas furnace, and transferring the forging to a ring rolling mill for multi-fire direct rolling;
s4, flanging: heating a ring forging by using a high-temperature gas furnace to 960 ℃, preserving heat for 0.5 hour, transferring to a press for molding, placing a flanging punch 2 on a lower table top of the press, placing a directly-rolled blank on the flanging punch 2, placing a flanging punch 1 on the upper end of the directly-rolled blank, and downward moving an upper table top of the press to flange the blank so as to turn out inner diameter materials at two ends of the blank to the outer diameter (as shown in figure 4);
s5, rotating pressure is high: heating the ring forging to 960 ℃ by adopting a high-temperature gas furnace, preserving heat for 0.5 hour, transferring to a press for molding, performing multi-pass rotation on two ends of the ring forging by adopting a narrow table top on an upper table top, performing local high and local stacking, molding out the ring forging with thick two ends and thin middle, and accurately distributing raw materials at each part of the ring forging;
s6, special-shaped pre-rolling: heating the ring forging to 960 ℃ by adopting a high-temperature gas furnace, preserving heat for 0.5 hour, transferring to a ring rolling mill for ring rolling, and pre-rolling by adopting an outer diameter tool and an inner diameter tool 1;
s7, special-shaped finish rolling: heating the ring forging to 960 ℃ by using a high-temperature gas furnace, preserving heat for 0.5 hour, transferring to a ring rolling mill for ring rolling to obtain an asymmetric special-shaped ring forging with a final design shape, and performing final rolling by using an outer diameter tool and an inner diameter tool 2 to obtain the asymmetric special-shaped ring forging with the final design shape (as shown in figure 4);
s8, solution heat treatment: carrying out heat treatment on the ring forging by using a heat treatment furnace, keeping the temperature at 950 ℃ for 1 hour, and then discharging from the furnace for air cooling or water cooling;
s9, aging heat treatment: carrying out heat treatment on the ring forging by adopting a heat treatment furnace, keeping the temperature of 720 ℃ for 4 hours, cooling the furnace to 620 ℃, keeping the temperature of 620 ℃ for 1 hour, discharging the ring forging out of the furnace, and air cooling;
s10, testing: testing the product sample to verify whether the product sample meets the specification requirements;
s11, checking: and (5) checking according to the required size of the drawing.
In this embodiment, tooling die set contains turn-ups drift 1, turn-ups drift 2, external diameter frock, internal diameter frock 1, internal diameter frock 2, wherein:
1. the flanging punch 1 is large at the top and small at the bottom, the outer diameter of the small end is 5-15mm smaller than the inner diameter of the directly-rolled blank so as to be accurately placed into the inner diameter of the directly-rolled blank during flanging, the outer diameter of the large end is 30-50mm larger than the outer diameter of the small end according to the flanging amount, and the outer diameter is an inclined plane and is used for gradually turning the inner diameter of the upper end of the directly-rolled blank outwards;
2. the flanging punch 2 is small in upper part and large in lower part, the outer diameter of the small end is 5-15mm smaller than the inner diameter of the directly-rolled blank so as to be accurately placed into the inner diameter of the directly-rolled blank during flanging, the large end is provided with a flange step for supporting the blank, and the outer diameter is an inclined plane for gradually turning the inner diameter of the lower end of the directly-rolled blank outwards;
3. the profile of the outer diameter tool type groove is consistent with the profile of the outer diameter of the forge piece and is in an asymmetric structure;
4. the section of the inner diameter tool 1 is a rectangular section so as to be convenient for smooth transition when a flanged blank is rolled;
5. the outer diameter profile of the inner diameter tool 2 is consistent with the inner diameter profile of the forge piece and is also in an asymmetric structure.
Example 2
A method for forming an asymmetric complex-section special-shaped ring mainly comprises the following steps:
s1, blanking: cutting according to the process requirements;
s2, punching: heating the blank by a high-temperature gas furnace to 1120 ℃, preserving heat for 4.5 hours, taking out the blank from the high-temperature gas furnace, transporting the blank to a press, and upsetting and punching the blank;
s3, straight rolling: heating the punched ring forging to 1120 ℃ by using a high-temperature gas furnace, preserving heat for 3 hours, taking out the forging from the high-temperature gas furnace, and transferring the forging to a ring rolling mill for multi-fire direct rolling;
s4, flanging: heating a ring forging by using a high-temperature gas furnace to 1020 ℃, preserving heat for 2.5 hours, transferring to a press for forming, placing a flanging punch 2 on a lower table top of the press, placing a directly-rolled blank on the flanging punch 2, placing a flanging punch 1 on the upper end of the directly-rolled blank, and downward moving an upper table top of the press to flange the blank so as to turn out inner diameter materials at two ends of the blank to the outer diameter (as shown in figure 4);
s5, rotating pressure is high: heating the ring forging to 1020 ℃ by adopting a high-temperature gas furnace, preserving heat for 2 hours, transferring to a press for molding, performing multi-pass rotation on two ends of the ring forging by adopting a narrow table top on an upper table top, performing local high-pressure local stacking, molding the ring forging with thick two ends and thin middle, and accurately distributing raw materials at each part of the ring forging;
s6, special-shaped pre-rolling: heating the ring forging to 1020 ℃ by adopting a high-temperature gas furnace, preserving heat for 2 hours, transferring to a ring rolling mill for ring rolling, and pre-rolling by adopting an outer diameter tool and an inner diameter tool 1;
s7, special-shaped finish rolling: heating the ring forging to 1020 ℃ by using a high-temperature gas furnace, preserving heat for 2 hours, transferring to a ring rolling mill for ring rolling to obtain an asymmetric special-shaped ring forging with a final design shape, and performing final rolling by using an outer diameter tool and an inner diameter tool 2 to obtain the asymmetric special-shaped ring forging with the final design shape (as shown in figure 4);
s8, solution heat treatment: carrying out heat treatment on the ring forging by adopting a heat treatment furnace, keeping the temperature at 1000 ℃ for 2 hours, and then discharging from the furnace for air cooling or water cooling;
s9, aging heat treatment: carrying out heat treatment on the ring forging by adopting a heat treatment furnace, keeping the temperature at 780 ℃ for 6 hours, cooling the furnace to 650 ℃, keeping the temperature at 650 ℃ for 1 hour, discharging the ring forging out of the furnace, and air cooling;
s10, testing: testing the product sample to verify whether the product sample meets the specification requirements;
s11, checking: and (5) checking according to the required size of the drawing.
In this embodiment, the structure of the tooling die set is the same as that in embodiment 1.
Example 3
A method for forming an asymmetric complex-section special-shaped ring mainly comprises the following steps:
s1, blanking: cutting according to the process requirements;
s2, punching: heating the blank by a high-temperature gas furnace to 1080 ℃, preserving heat for 2.5 hours, taking out the blank from the high-temperature gas furnace, transporting the blank to a press, and upsetting and punching the blank;
s3, straight rolling: heating the punched ring forging to 1080 ℃ by using a high-temperature gas furnace, preserving heat for 1.5 hours, taking out the forging from the high-temperature gas furnace, and transferring the forging to a ring rolling mill for multi-fire straight rolling;
s4, flanging: heating a ring forging to 980 ℃ by using a high-temperature gas furnace, preserving heat for 1 hour, transferring to a press for forming, placing a flanging punch 2 on a lower table top of the press, placing a directly-rolled blank on the flanging punch 2, placing a flanging punch 1 on the upper end of the directly-rolled blank, and downward turning the blank by using an upper table top of the press, so that inner diameter materials at two ends of the blank are turned out towards the outer diameter (as shown in figure 4);
s5, rotating pressure is high: heating the ring forging to 980 ℃ by using a high-temperature gas furnace, preserving heat for 1 hour, transferring to a press for molding, performing multi-pass rotation on two ends of the ring forging by using a narrow table top on an upper table top, performing local high-pressure local stacking, molding the ring forging with thick two ends and thin middle, and accurately distributing raw materials at each part of the ring forging;
s6, special-shaped pre-rolling: heating the ring forging to 980 ℃ by using a high-temperature gas furnace, preserving heat for 1 hour, transferring to a ring rolling mill for ring rolling, and pre-rolling by using an outer diameter tool and an inner diameter tool 1;
s7, special-shaped finish rolling: heating the ring forging to 980 ℃ by using a high-temperature gas furnace, preserving heat for 1 hour, transferring to a ring rolling mill for ring rolling to obtain an asymmetric special-shaped ring forging with a final design shape, and performing final rolling by using an outer diameter tool and an inner diameter tool 2 to obtain the asymmetric special-shaped ring forging with the final design shape (as shown in figure 4);
s8, solution heat treatment: carrying out heat treatment on the ring forging by using a heat treatment furnace, keeping the temperature at 960 ℃ for 1.5 hours, and then discharging from the furnace for air cooling or water cooling;
s9, aging heat treatment: carrying out heat treatment on the ring forging by adopting a heat treatment furnace, keeping the temperature at 740 ℃ for 4.5 hours, then cooling the furnace to 630 ℃, keeping the temperature at 630 ℃ for 1 hour, and then discharging the ring forging out of the furnace for air cooling;
s10, testing: testing the product sample to verify whether the product sample meets the specification requirements;
s11, checking: and (5) checking according to the required size of the drawing.
In this embodiment, the structure of the tooling die set is the same as that in embodiment 1.
Example 4
A method for forming an asymmetric complex-section special-shaped ring mainly comprises the following steps:
s1, blanking: cutting according to the process requirements;
s2, punching: heating the blank by a high-temperature gas furnace to 1100 ℃, preserving heat for 3 hours, taking out the blank from the high-temperature gas furnace, transporting the blank to a press, and upsetting and punching the blank;
s3, straight rolling: heating the punched ring forging to 1100 ℃ by using a high-temperature gas furnace, preserving heat for 2.5 hours, taking out the forging from the high-temperature gas furnace, and transferring the forging to a ring rolling mill for multi-fire straight rolling;
s4, flanging: heating a ring forging to 1000 ℃ by adopting a high-temperature gas furnace, preserving heat for 2 hours, transferring to a press for forming, placing a flanging punch 2 on a lower table top of the press, placing a directly-rolled blank on the flanging punch 2, placing a flanging punch 1 on the upper end of the directly-rolled blank, and downward moving an upper table top of the press to flange the blank so as to turn out inner diameter materials at two ends of the blank to the outer diameter (as shown in figure 4);
s5, rotating pressure is high: heating the ring forging to 1000 ℃ by adopting a high-temperature gas furnace, preserving heat for 1.5 hours, transferring to a press for molding, performing multi-pass rotation on two ends of the ring forging by adopting a narrow table top on an upper table top, performing local high and local stacking, molding out the ring forging with thick two ends and thin middle, and accurately distributing raw materials at each part of the ring forging;
s6, special-shaped pre-rolling: heating the ring forging to 1000 ℃ by adopting a high-temperature gas furnace, preserving heat for 1.5 hours, transferring to a ring rolling mill for ring rolling, and pre-rolling by adopting an outer diameter tool and an inner diameter tool 1;
s7, special-shaped finish rolling: heating the ring forging to 1000 ℃ by using a high-temperature gas furnace, preserving heat for 1.5 hours, transferring to a ring rolling mill for ring rolling to obtain an asymmetric special-shaped ring forging with a final design shape, and performing final rolling by using an outer diameter tool and an inner diameter tool 2 to obtain the asymmetric special-shaped ring forging with the final design shape (as shown in figure 4);
s8, solution heat treatment: carrying out heat treatment on the ring forging by using a heat treatment furnace, keeping the temperature at 980 ℃ for 2 hours, and then discharging from the furnace for air cooling or water cooling;
s9, aging heat treatment: carrying out heat treatment on the ring forging by adopting a heat treatment furnace, keeping the temperature at 760 ℃ for 5.5 hours, then cooling the furnace to 640 ℃, keeping the temperature at 640 ℃ for 1 hour, and then discharging the ring forging out of the furnace for air cooling;
s10, testing: testing the product sample to verify whether the product sample meets the specification requirements;
s11, checking: and (5) checking according to the required size of the drawing.
In this embodiment, the structure of the tooling die set is the same as that in embodiment 1.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (2)
1. A method for forming an asymmetric complex-section special-shaped ring is characterized by mainly comprising the following steps:
s1, blanking: cutting according to the process requirements;
s2, punching: heating the blank by a high-temperature gas furnace to 1060-1120 ℃, preserving heat for 2-4.5 hours, taking out the blank from the high-temperature gas furnace, transporting the blank to a press, and upsetting and punching the blank;
s3, straight rolling: heating the punched ring forging to 1060-1120 ℃ by using a high-temperature gas furnace, preserving heat for 1-3 hours, taking out the forging from the high-temperature gas furnace, and transferring the forging to a ring rolling mill for multi-fire direct rolling;
s4, flanging: heating the ring forging to 960-1020 ℃ by adopting a high-temperature gas furnace, preserving heat for 0.5-2.5 hours, and transferring to a press for molding;
s5, rotating pressure is high: heating the ring forging to 960-1020 ℃ by adopting a high-temperature gas furnace, preserving heat for 0.5-2 hours, transferring to a press for molding, performing multi-pass rotation on two ends of the ring forging by adopting a narrow table top on an upper table top, performing local high-pressure partial stacking, molding the ring forging with thick two ends and thin middle, and accurately distributing raw materials at each part of the ring forging;
s6, special-shaped pre-rolling: heating the ring forging to 960-1020 ℃ by adopting a high-temperature gas furnace, preserving the heat for 0.5-2 hours, and transferring to a ring rolling mill for ring rolling;
s7, special-shaped finish rolling: heating the ring forging to 960-1020 ℃ by adopting a high-temperature gas furnace, preserving heat for 0.5-2 hours, transferring to a ring rolling mill for ring rolling to obtain an asymmetric special-shaped ring forging with a final design shape;
s8, solution heat treatment: carrying out heat treatment on the ring forging by adopting a heat treatment furnace, keeping the temperature at 950-1000 ℃ for 1-2 hours, and then discharging from the furnace for air cooling or water cooling;
s9, aging heat treatment: carrying out heat treatment on the ring forging by adopting a heat treatment furnace, keeping the temperature of 720-780 ℃ for 4-6 hours, then cooling the furnace to 620-650 ℃, keeping the temperature of 620-650 ℃ for 1 hour, then discharging the ring forging out of the furnace and air cooling;
s10, testing: testing the product sample to verify whether the product sample meets the specification requirements;
s11, checking: and (5) checking according to the required size of the drawing.
2. The method for forming an asymmetrical complex-section profiled ring according to claim 1, characterized in that it essentially comprises the following steps:
s1, blanking: cutting according to the process requirements;
s2, punching: heating the blank by a high-temperature gas furnace to 1080-1100 ℃, preserving heat for 2.5-3 hours, taking out the blank from the high-temperature gas furnace, transporting the blank to a press, and upsetting and punching the blank;
s3, straight rolling: heating the punched ring forging to 1080-1100 deg.c with high temperature gas furnace, maintaining for 1.5-2.5 hr, taking out the forging from the high temperature gas furnace and transferring to a ring rolling machine for several times of direct rolling;
s4, flanging: heating the ring forging to 980-1000 ℃ by using a high-temperature gas furnace, preserving heat for 1-2 hours, and transferring to a press for molding;
s5, rotating pressure is high: heating the ring forging to 980-1000 ℃ by using a high-temperature gas furnace, preserving heat for 1-1.5 hours, transferring to a press for molding, performing multi-pass rotation on two ends of the ring forging by using a narrow table top on an upper table top, performing local high-pressure partial stacking, molding the ring forging with thick two ends and thin middle, and accurately distributing raw materials at each part of the ring forging;
s6, special-shaped pre-rolling: heating the ring forging to 980-1000 ℃ by using a high-temperature gas furnace, preserving the heat for 1-1.5 hours, and transferring to a ring rolling mill for ring rolling;
s7, special-shaped finish rolling: heating the ring forging to 980-1000 ℃ by using a high-temperature gas furnace, preserving heat for 1-1.5 hours, transferring to a ring rolling mill for ring rolling to obtain an asymmetric special-shaped ring forging with a final design shape;
s8, solution heat treatment: carrying out heat treatment on the ring forging by using a heat treatment furnace, keeping the temperature at 960-980 ℃ for 1.5-2 hours, and then discharging the ring forging from the furnace for air cooling or water cooling;
s9, aging heat treatment: carrying out heat treatment on the ring forging by adopting a heat treatment furnace, keeping the temperature at 740-760 ℃ for 4.5-5.5 hours, cooling the ring forging to 630-640 ℃, keeping the temperature at 630-640 ℃ for 1 hour, and then discharging the ring forging out of the furnace for air cooling;
s10, testing: testing the product sample to verify whether the product sample meets the specification requirements;
s11, checking: and (5) checking according to the required size of the drawing.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113182470A (en) * | 2021-04-12 | 2021-07-30 | 伊莱特能源装备股份有限公司 | Near-net forming manufacturing process for hundred-ton-grade special-shaped cross-section ring forging |
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