CN115415459A - High-performance radial forging and semi-solid ring rolling composite process for large centrifugal casting ring piece - Google Patents
High-performance radial forging and semi-solid ring rolling composite process for large centrifugal casting ring piece Download PDFInfo
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- CN115415459A CN115415459A CN202211144561.XA CN202211144561A CN115415459A CN 115415459 A CN115415459 A CN 115415459A CN 202211144561 A CN202211144561 A CN 202211144561A CN 115415459 A CN115415459 A CN 115415459A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J7/00—Hammers; Forging machines with hammers or die jaws acting by impact
- B21J7/02—Special design or construction
- B21J7/14—Forging machines working with several hammers
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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
- 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
- B21K29/00—Arrangements for heating or cooling during processing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/04—Centrifugal casting; Casting by using centrifugal force of shallow solid or hollow bodies, e.g. wheels or rings, in moulds rotating around their axis of symmetry
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/10—Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor, means for feeding molten metal, cleansing moulds, removing castings
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Abstract
A high-performance radial forging and semi-solid ring rolling composite process for a large centrifugal casting ring piece comprises the steps of firstly preparing a large circular-section ring blank by adopting a centrifugal casting process; then carrying out three-hammer radial forging plastic deformation on the large circular-section ring blank by using centrifugal casting waste heat to obtain a large ring forging-state ring piece; secondly remelting the forged large ring piece to obtain a semi-solid blank of the large ring piece with a fine, uniform and spherical microstructure; then, forming the large-scale ring piece with the rectangular cross section by semi-solid ring rolling on the large-scale ring piece semi-solid blank; finally, carrying out ring rolling post-heat treatment on the large-sized ring piece with the rectangular cross section, and finally preparing a large-sized ring piece forming piece; the method can prepare the large ring piece with non-dendritic crystal, fine densification, uniform and spherical microstructure, and has the advantages of high efficiency, high performance, low energy consumption and low cost.
Description
Technical Field
The invention belongs to the technical field of large-scale ring piece manufacturing, and particularly relates to a high-performance radial forging and semi-solid ring rolling composite process for a large-scale centrifugal casting ring piece.
Background
The requirements of manned landing on the moon, space station construction and deep space exploration on a heavy carrier rocket with larger delivery capacity are more and more urgent, and the large ring piece is used as a key part of heavy carrying equipment and influences the delivery capacity of the heavy carrying equipment to a great extent, so that the development of a forming technology of the high-performance large ring piece is important for the development of the heavy load equipment; meanwhile, with the continuous development and upgrade of the wind power industry, the demand for large bearing rings and large ring pieces for large wind power gear rings in wind power equipment is increasing, and therefore a new efficient manufacturing process for the large ring pieces needs to be developed urgently.
The traditional manufacturing process of the large ring part (the determination method [ J ] of the blank size in the ring part casting and rolling composite forming process) takes a solid ingot as a raw material, and comprises the following steps of dead head cutting, integral heating, integral forging of the solid ingot, repeated upsetting-drawing forging, punching, core rod reaming, saddle reaming and ring grinding, wherein the traditional manufacturing process of the solid ingot as the raw material has the following defects: (1) The large ingot has excessive parts such as dead heads, flash burrs and the like, and the ingot needs to be cut and removed when being cleaned, so that the material utilization rate is caused, the defects of a cast part are large, and the production period is long; (2) The large ingot casting has many internal defects, and the internal defects of the material can be eliminated only by repeatedly upsetting and drawing, so that the manufacturing efficiency of the workpiece is very low; (3) In the manufacturing process, core rod reaming and trestle reaming are needed, repeated heating is needed, the energy consumption is high, and the production period is long; (4) In the process of ring rolling plastic deformation, the ring piece material is pressed in the radial pressing-in direction of the pressing roller, the ring piece material is free in the axial direction, and is not in three-dimensional compressive stress, the compactness degree is low, and the internal defects cannot be fully broken, so that the mechanical property of the large ring rolling piece is low.
Therefore, the traditional manufacturing method of the large ring piece cannot meet the comprehensive requirements of high efficiency, high performance, low energy consumption and low cost in the market.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a high-performance radial forging and semi-solid ring rolling composite process for a large centrifugal casting ring piece, which can be used for preparing the large ring piece with non-dendritic, fine, densified, uniform and spherical microstructures and has the advantages of high efficiency, high performance, low energy consumption and low cost.
In order to achieve the purpose, the invention adopts the technical scheme that:
a high-performance radial forging and semi-solid ring rolling composite process for a large centrifugal casting ring piece comprises the following steps:
1) Preparing a large circular-section ring blank by adopting a centrifugal casting process;
2) Carrying out three-hammer radial forging plastic deformation on the large circular-section ring blank by using centrifugal casting waste heat to obtain a large ring forging-state ring piece;
3) Remelting the forged large ring piece for the second time to obtain a semi-solid blank of the large ring piece with a fine, uniform and spherical microstructure;
4) Forming the large-scale ring piece with the rectangular cross section by semi-solid ring rolling on the semi-solid blank of the large-scale ring piece;
5) And finally, carrying out ring rolling post-heat treatment on the large-sized ring piece with the rectangular cross section, and finally preparing a large-sized ring piece forming piece.
The step 1) is specifically as follows: smelting the prepared 7055 aluminum alloy material in a medium-frequency induction smelting furnace at a smelting temperature of above 730 ℃, and keeping the temperature for 40-60min for refining and degassing; and then controlling the temperature of the aluminum alloy liquid 1-1 obtained by smelting to be 700-710 ℃, pouring the aluminum alloy liquid into centrifugal casting equipment, and preparing a large circular-section ring blank 1-2 by adopting a centrifugal casting process.
The step 2) is specifically as follows: when the temperature of the large circular cross-section ring blank 1-2 prepared in the step 1) is reduced to 420-450 ℃, the large circular cross-section ring blank 1-2 generates plastic deformation with large deformation amount through a three-hammer radial forging process, and the inner diameter and the outer diameter of the large circular cross-section ring blank 1-2 are enlarged and the diameter of the circular cross section is reduced after the three-hammer radial forging; the radial forging process of the three hammers of the circular section ring body comprises three radial forging hammers 2-1 which are uniformly arranged along the central line of the circular section of the large circular section ring blank 1-2 in space, wherein the radial forging hammers 2-1 are axial forming radial forging hammers; the three-hammer radial forging process of the circular section ring body comprises the following specific processes:
2.1 Three radial forging hammers 2-1 strike and forge the large circular-section annular blank 1-2 on the circular section of the large circular-section annular blank 1-2, wherein the radial forging amount is the preset radial forging amount of the current pass;
2.2 Lifting the radial forging hammer 2-1, rotating the large circular-section annular blank 1-2 around the axis by an angle alpha, and simultaneously rotating the three radial forging hammers 2-1 by an angle beta along the central line of the circular section of the large circular-section annular blank 1-2; the angle alpha and the angle beta are matched with each other, so that each circular section of the large circular section ring blank 1-2 can be effectively and uniformly forged in the circumferential direction;
2.3 Step 2.1) to step 2.2) are repeated until the inner and outer diameters of the whole large-sized circular-section ring blank 1-2 become larger and the diameter of the circular section becomes smaller under the radial forging amount of the current pass, and the ring body 1-2-1 is obtained by forming, thus completing the radial forging of the current pass;
2.4 Repeating the steps 2.1) to 2.3) to complete radial forging of the ring body in the subsequent pass; the radial forging amount of each pass is preset, and the sum of the radial forging amounts of all the passes is the total radial forging amount; and completing three-hammer radial forging plastic deformation of the large circular cross-section ring blank 1-2 under the total radial forging amount, ensuring that the reduction of area of the large ring forging-state ring piece 1-3 obtained through radial forging deformation reaches more than 40%, and enabling the large ring forging-state ring piece 1-3 to generate large-deformation plastic deformation and material tissue internal storage deformation energy.
The step 3) is specifically as follows: and (3) placing the large ring forging-state ring 1-3 obtained by radial forging of three hammers in the step 2.4) into an electric furnace or a medium-frequency induction heating furnace for heating and heat preservation, wherein the heating temperature is controlled at 595-610 ℃, and the heat preservation time is 15-30 min, so as to obtain the large semi-solid ring blank 1-4 with a fine, uniform and spherical microstructure.
The step 4) is specifically as follows: quickly taking out the large ring semi-solid blank 1-4 obtained in the step 3) after the secondary remelting and putting the blank into a ring rolling device; the ring rolling device comprises a driving roller 3-1, a guide roller 3-2, a core roller 3-3 and an axial conical roller 3-4, wherein the driving roller 3-1 rotates around the axis of the driving roller so as to drive the large ring semi-solid blank 1-4 to rotate; the core roller 3-3 slowly moves towards the direction of the driving roller 3-1 while rotating, and the wall thickness of the large ring semi-solid blank 1-4 is reduced through the radial rolling action of the driving roller 3-1 and the core roller 3-3, so that the diameter of the ring is controlled; the pair of guide rollers 3-2 plays a role in guiding the rotation of the large ring semi-solid blank 1-4; controlling the height of the large ring semi-solid blank 1-4 through the axial rolling action of a pair of axial conical rollers 3-4; semi-solid ring rolling forming is carried out on the large-sized ring semi-solid blank 1-4 through a ring rolling device, the round section of the large-sized ring semi-solid blank 1-4 is plastically deformed into a rectangular section after ring rolling, the large-sized ring piece 1-5 with the rectangular section is obtained, and crystal grains are further refined.
The step 5) is specifically as follows: performing solid solution and aging treatment on the ring-rolled large rectangular-section ring piece 1-5 obtained in the step 4), firstly, performing two-stage solid solution treatment on the large rectangular-section ring piece 1-5 by adopting a two-stage solid solution process of 450 ℃/3h +495 ℃/0.5h, and then performing two-stage artificial aging treatment on the large rectangular-section ring piece 1-5 subjected to the solid solution treatment at 120 ℃/6h +160 ℃/6h, so as to finally obtain a large ring piece forming piece 1-6.
Compared with the prior art, the invention has the following advantages:
(1) According to the invention, the large centrifugal casting ring piece is used as an original blank, metal consumption of a pouring system and a riser system hardly exists, the material utilization rate is high, the density of the centrifugal casting piece relative to a cylindrical cast ingot is higher, the defects of looseness, air holes, slag inclusion and the like are fewer in the casting process, a mold core can be omitted during production of a hollow annular casting, the production process of the casting is simplified, and the production period is short;
(2) The invention can effectively eliminate the internal defects of the casting by a high-performance radial forging process, and the radial forging hammer head high-frequency forging casting has high forming efficiency;
(3) The invention effectively utilizes the centrifugal casting waste heat to carry out radial forging forming, and the radial forging process is an energy-saving and efficient forming process, so that the whole manufacturing process has low energy consumption and short production period;
(4) The three-hammer radial forging process is adopted, and the ring piece material is subjected to three-dimensional compressive stress, so that internal defects can be fully broken, the microstructure is fine and compact, and the mechanical property of the large ring piece can be greatly improved.
Drawings
FIG. 1 is a schematic diagram of the manufacturing process of the embodiment of the invention from 7055 aluminum alloy liquid 1-1 to large-scale ring forming pieces 1-6.
Fig. 2 is a schematic diagram of hammer head striking forging of a large circular-section ring billet 1-2 radially forged by three hammer heads according to an embodiment of the invention.
Fig. 3 is a schematic diagram of hammerhead lifting and workpiece and hammerhead rotation of a three-hammerhead radial forging large circular cross-section ring blank 1-2 in the embodiment of the invention.
Fig. 4 is a schematic diagram of the completion of forging in the current pass of the three-hammer radial forging of the large circular-section ring blank 1-2 according to the embodiment of the invention.
Fig. 5 is a schematic view of a semi-solid mill ring used in an embodiment of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
Referring to fig. 1, a high-performance radial forging and semi-solid ring rolling composite process for a large centrifugally cast ring, taking a 7055 aluminum alloy large ring as an example, comprises the following steps:
1) Preparing a large ring blank with a circular section by centrifugal casting: smelting the prepared 7055 aluminum alloy material in a medium-frequency induction smelting furnace at a smelting temperature of above 730 ℃, and keeping the temperature for 40-60min for refining and degassing; then controlling the temperature of the aluminum alloy liquid 1-1 obtained by smelting to be 700-710 ℃, pouring the aluminum alloy liquid into centrifugal casting equipment, and preparing a large circular-section ring blank 1-2 by adopting a centrifugal casting process;
2) Carrying out three-hammer radial forging plastic deformation by using centrifugal casting waste heat: when the temperature of the large-scale circular cross-section ring blank 1-2 prepared in the step 1) is reduced to 420-450 ℃, the large-scale cast-state ring body 1-2 obtained in the step 1) generates plastic deformation with large deformation amount through a three-hammer radial forging process, the inner diameter and the outer diameter of the large-scale circular cross-section ring blank 1-2 are enlarged and the diameter of the circular cross section is reduced after the three-hammer radial forging, so that the purposes of forging the internal defects of the cast blank, crushing dendrites in microstructures and enabling the microstructures to be fine and compact are achieved, and large deformation energy is stored in the material tissue through large plastic deformation after the radial forging; referring to fig. 2, the radial forging process of the three hammers of the circular-section ring body comprises three radial forging hammers 2-1 which are uniformly arranged along the central line of the circular section of the large circular-section ring blank 1-2 in space, wherein the radial forging hammers 2-1 are axial-formed radial forging hammers; the three-hammer radial forging process of the circular section ring body comprises the following specific processes:
2.1 Referring to fig. 2), three radial forging hammers 2-1 strike and forge the large circular-section annular blank 1-2 on the circular section of the large circular-section annular blank 1-2, wherein the radial forging amount is the preset radial forging amount of the current pass;
2.2 Referring to fig. 3), lifting the radial forging hammer 2-1, rotating the large circular-section annular blank 1-2 by an angle alpha around the axis of the large circular-section annular blank, and simultaneously rotating the three radial forging hammers 2-1 by an angle beta along the central line of the circular section of the large circular-section annular blank 1-2; the angle alpha and the angle beta are matched with each other, so that each circular section of the large circular section ring blank 1-2 can be effectively and uniformly forged in the circumferential direction;
2.3 Referring to fig. 4), repeating the steps 2.1) to 2.2) until the inner diameter and the outer diameter of the whole large-sized circular-section ring blank 1-2 become larger and the diameter of the circular section becomes smaller under the radial forging amount of the current pass, forming to obtain a ring body 1-2-1, and finishing the radial forging of the current pass;
2.4 Repeating the steps 2.1) to 2.3) to complete radial forging of the ring body in the subsequent pass; the radial forging amount of each pass is preset, and the sum of the radial forging amounts of all the passes is the total radial forging amount; and the three-hammer radial forging plastic deformation of the large-scale circular-section ring blank 1-2 is completed under the total radial forging amount, the reduction of area of the large-scale ring forging-state ring piece 1-3 obtained through radial forging deformation is ensured to reach more than 40%, and the large-scale cast-state ring body generates large-deformation plastic deformation and stores large deformation energy in the material tissue.
3) Secondary remelting: placing the forged ring piece 1-3 of the large ring piece obtained by radial forging of the three hammers in the step 2.4) into an electric furnace or a medium-frequency induction heating furnace for heating and heat preservation, wherein the heating temperature is controlled at 595-610 ℃, and the heat preservation time is 15-30 min, so as to obtain a large semi-solid ring piece blank 1-4 with a fine, uniform and spherical microstructure;
4) 1-5 of semi-solid ring rolling forming large-sized ring piece with rectangular section: referring to fig. 5, quickly taking out the large ring semi-solid blank 1-4 obtained in the step 3) after the secondary remelting and putting the blank into a ring rolling device; the ring rolling device comprises a driving roller 3-1, a guide roller 3-2, a core roller 3-3 and an axial conical roller 3-4, wherein the driving roller 3-1 rotates around the axis of the driving roller so as to drive the large ring semi-solid blank 1-4 to rotate; the core roller 3-3 slowly moves towards the direction of the driving roller 3-1 while rotating, and the wall thickness of the large ring semi-solid blank 1-4 is reduced through the radial rolling action of the driving roller 3-1 and the core roller 3-3, so that the diameter of the ring is controlled; the pair of guide rollers 3-2 plays a role in guiding the rotation of the large ring semi-solid blank 1-4; controlling the height of the large ring semi-solid blank 1-4 through the axial rolling action of a pair of axial conical rollers 3-4; semi-solid ring rolling forming is carried out on the large-sized ring semi-solid blank 1-4 through a ring rolling device, the round section of the large-sized ring semi-solid blank 1-4 is plastically deformed into a rectangular section after ring rolling, the large-sized ring piece 1-5 with the rectangular section is obtained, and crystal grains are further refined;
5) Heat treatment after ring rolling: the method comprises solid solution and aging treatment, firstly, the large-sized ring piece with the rectangular section obtained in the step 4) is treated by adopting a double-stage solid solution process of 450 ℃/3h +495 ℃/0.5h, then the large-sized ring piece with the rectangular section after the solid solution treatment is subjected to two-stage artificial aging treatment of 120 ℃/6h +160 ℃/6h, and finally the large-sized ring piece forming piece 1-6 is obtained.
The above description is only an example of the 7055 aluminum alloy of the present invention, and the protection scope of the present invention is not limited thereto, and it is within the protection scope of the present invention to apply the process to manufacture large ring members made of other metal materials, such as copper alloy, aluminum alloy, and other large ring members, only to match corresponding process parameters.
Claims (6)
1. A high-performance radial forging and semi-solid ring rolling composite process for a large centrifugal casting ring piece is characterized by comprising the following steps of:
1) Preparing a large circular-section ring blank by adopting a centrifugal casting process;
2) Carrying out three-hammer radial forging plastic deformation on the large circular-section ring blank by using centrifugal casting waste heat to obtain a large ring forging-state ring piece;
3) Remelting the forged large ring for the second time to obtain a semi-solid blank of the large ring with a fine, uniform and spherical microstructure;
4) Forming the large-scale ring piece with the rectangular cross section by semi-solid ring rolling on the semi-solid blank of the large-scale ring piece;
5) And finally, carrying out ring rolling post-heat treatment on the large-sized ring piece with the rectangular cross section, and finally preparing a large-sized ring piece forming piece.
2. The process according to claim 1, wherein the step 1) is specifically: smelting the prepared 7055 aluminum alloy material in a medium-frequency induction smelting furnace at a smelting temperature of above 730 ℃, and keeping the temperature for 40-60min for refining and degassing; and then controlling the temperature of the aluminum alloy liquid (1-1) obtained by smelting to be 700-710 ℃ and pouring the aluminum alloy liquid into centrifugal casting equipment, and preparing a large circular-section ring blank (1-2) by adopting a centrifugal casting process.
3. The process according to claim 2, wherein the step 2) is specifically: when the temperature of the large circular cross-section ring blank (1-2) prepared in the step 1) is reduced to 420-450 ℃, the large circular cross-section ring blank (1-2) generates plastic deformation with large deformation amount through a three-hammer radial forging process, and the inner diameter and the outer diameter of the large circular cross-section ring blank (1-2) are increased and the diameter of the circular cross section is reduced after the three-hammer radial forging; the three-hammer radial forging process of the circular-section ring body comprises three radial forging hammers (2-1), wherein the three radial forging hammers are uniformly distributed along the central line of the circular section of a large circular-section ring blank (1-2) in space, and the radial forging hammers (2-1) are axial-formed radial forging hammers; the three-hammer radial forging process of the circular section ring body comprises the following specific processes:
2.1 Three radial forging hammers (2-1) strike and forge the large circular-section annular blank (1-2) on the circular section of the large circular-section annular blank (1-2), wherein the radial forging amount is the preset radial forging amount of the current pass;
2.2 Lifting the radial forging hammer heads (2-1), rotating the large circular-section annular blank (1-2) by an angle alpha around the axis of the large circular-section annular blank, and rotating the three radial forging hammer heads (2-1) by an angle beta along the center line of the circular section of the large circular-section annular blank (1-2); wherein the angle alpha and the angle beta are matched with each other, so that each circular section of the large circular section ring blank (1-2) can be effectively and uniformly forged in the circumferential direction;
2.3 Step 2.1) to step 2.2) are repeated until the inner and outer diameters of the whole large-sized circular-section ring blank (1-2) are increased and the diameter of the circular section is decreased under the radial forging amount of the current pass, a ring body (1-2-1) is obtained by forming, and the radial forging of the current pass is completed;
2.4 Repeating the steps 2.1) to 2.3) to complete radial forging of the ring body in the subsequent pass; the radial forging amount of each pass is preset, and the sum of the radial forging amounts of all the passes is the total radial forging amount; the three-hammer radial forging plastic deformation of the large circular-section ring blank (1-2) is completed under the total radial forging amount, the reduction of area of the large ring forging-state ring piece (1-3) obtained through radial forging deformation is ensured to reach more than 40%, and the large ring forging-state ring piece (1-3) generates large-deformation plastic deformation and material tissue internal storage deformation energy.
4. The process according to claim 3, wherein the step 3) is specifically: and (3) placing the large ring forging-state ring (1-3) obtained by radial forging of three hammers in the step 2.4) into an electric furnace or a medium-frequency induction heating furnace for heating and heat preservation, wherein the heating temperature is controlled to be 595-610 ℃, and the heat preservation time is 15-30 min, so as to obtain the large ring semi-solid blank (1-4) with a fine, uniform and spherical microstructure.
5. The process according to claim 4, wherein the step 4) is specifically: quickly taking out the large ring semi-solid blank (1-4) obtained in the step 3) after secondary remelting and putting the blank into a ring rolling device; the ring rolling device comprises a driving roller (3-1), a guide roller (3-2), a core roller (3-3) and an axial conical roller (3-4), wherein the driving roller (3-1) rotates around the axis of the driving roller so as to drive the large ring semi-solid blank (1-4) to rotate; the core roller (3-3) slowly moves towards the direction of the driving roller (3-1) while rotating, and the wall thickness of the large ring semi-solid blank (1-4) is reduced through the radial rolling action of the driving roller (3-1) and the core roller (3-3) so as to control the diameter of the ring; the pair of guide rollers (3-2) plays a role in guiding the rotation of the large ring semi-solid blank (1-4); the height of the large ring semi-solid blank (1-4) is controlled by the axial rolling action of a pair of axial conical rollers (3-4); semi-solid ring rolling forming is carried out on the large-sized ring semi-solid blank (1-4) through a ring rolling device, the round section of the large-sized ring semi-solid blank (1-4) is plastically deformed into a rectangular section after ring rolling, the large-sized ring (1-5) with the rectangular section is obtained, and crystal grains are further refined.
6. The process according to claim 5, wherein the step 5) is specifically: performing heat treatment after ring rolling including solid solution and aging treatment, firstly, treating the large-sized ring piece (1-5) with the rectangular section obtained in the step 4) by adopting a two-stage solid solution process of 450 ℃/3h +495 ℃/0.5h, and then performing two-stage artificial aging treatment on the large-sized ring piece (1-5) with the rectangular section after the solid solution treatment at 120 ℃/6h +160 ℃/6h to finally obtain a large-sized ring piece forming piece (1-6).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115608900A (en) * | 2022-12-16 | 2023-01-17 | 太原理工大学 | Metal clad material wave-flat radial forging composite equipment and method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115608900A (en) * | 2022-12-16 | 2023-01-17 | 太原理工大学 | Metal clad material wave-flat radial forging composite equipment and method thereof |
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