WO2023037667A1 - Procédé de production d'un élément forgé à chaud - Google Patents

Procédé de production d'un élément forgé à chaud Download PDF

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Publication number
WO2023037667A1
WO2023037667A1 PCT/JP2022/021761 JP2022021761W WO2023037667A1 WO 2023037667 A1 WO2023037667 A1 WO 2023037667A1 JP 2022021761 W JP2022021761 W JP 2022021761W WO 2023037667 A1 WO2023037667 A1 WO 2023037667A1
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Prior art keywords
forging
hot
heat
hot forging
temperature
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PCT/JP2022/021761
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English (en)
Japanese (ja)
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陽司 山下
宙也 青木
信一 小林
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株式会社プロテリアル
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Priority to JP2023546773A priority Critical patent/JP7498443B2/ja
Priority to CN202280060942.1A priority patent/CN117980089A/zh
Priority to EP22866997.4A priority patent/EP4400232A1/fr
Publication of WO2023037667A1 publication Critical patent/WO2023037667A1/fr

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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
    • B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
    • B21J1/02—Preliminary treatment of metal stock without particular shaping, e.g. salvaging segregated zones, forging or pressing in the rough
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J3/00—Lubricating during forging or pressing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor

Definitions

  • the present invention relates to a method for manufacturing hot forged materials, and more particularly to a method for manufacturing hot forged materials made of a difficult-to-work alloy.
  • Patent Document 1 Japanese National Publication of International Patent Application No. 2014-508857
  • heat cracking is prevented by coating a material for hot forging with glass.
  • a glass woven fabric and glass particles are arranged in order on a material for hot forging.
  • Patent Document 1 As shown in the examples, a glass woven cloth is wound around a hot forging material at room temperature, an inorganic slurry is applied to the surface of the glass woven cloth, and in that state, it is heated to the hot forging temperature. It is heated to form a glass coating layer.
  • This method is certainly effective in suppressing the temperature drop from when the hot forging material is removed from the heating furnace until the start of hot forging.
  • the woven glass cloth itself has a heat insulating effect, the heating time to the forging temperature is long. There is a drawback that it is difficult to know the temperature of the material for hot forging itself.
  • Ni-based alloys containing 20% or more by volume of ⁇ ' amount (hereinafter referred to as ⁇ ' high content Ni base alloys) are being considered for use at higher temperatures.
  • the hot forging temperature affects the occurrence of defects such as cracks and flaws, and in particular, some Ni-based alloys with a high ⁇ ′ content have a limited temperature range in which hot forging is possible. It is important to achieve both hot workability and prevention of defects such as cracks, and there is a demand for an efficient hot forging method while preventing cracks during hot forging.
  • An object of the present invention is to provide a method for producing a hot forged material that can be efficiently hot forged while preventing defects such as cracks even if a difficult-to-work alloy is used as a material for hot forging. be.
  • the present invention includes a heating step of heating a pre-heated material to be hot forged to a hot forging temperature in a heating furnace, A step of adhering a heat-resistant insulating material to at least part of the surface of the forging material taken out from the heating furnace to obtain a hot forging material; A hot forging step of compressing part or all of the hot forging material into a predetermined shape using any one of a die, an anvil, and a tool; including Furthermore, a glass lubricant coating step of coating a glass lubricant on at least a portion of the surface of the material before heating to which the heat-resistant heat insulating material is to be adhered; including In the method for producing a hot forged material, the glass lubricant has a viscosity of 10 2 to 10 7 Pa ⁇ s in the step of adhering the heat-resistant insulating material.
  • the hot forging step is free forging, and at least part of the surface of the free deformation portion of the forging material that does not come into contact with any of the die, the anvil, and the tool in the free forging is provided with the above-mentioned
  • It is a method for manufacturing a hot forged material in which a heat-resistant insulating material is adhered.
  • glass particles may be adhered to the surface of the heat-resistant heat insulating material to be adhered to the forging material.
  • the heat-resistant and heat-insulating material is a method for producing a hot forged material in which inorganic fibers are used.
  • BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows an example of the manufacturing method of the hot forged material of this invention.
  • BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows an example of the manufacturing method of the raw material for hot forgings of this invention.
  • BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows an example of the manufacturing method of the raw material for hot forgings of this invention.
  • the present invention will be described step by step below.
  • the "pre-heating material” described below refers to the material before being charged into the heating furnace
  • the "forging material” refers to the material heated to the hot forging temperature in the heating furnace.
  • "Material for hot forging” refers to a material that is ready for hot forging by adhering a heat-resistant insulation material to a predetermined part
  • hot forging material means a material that has been shaped into a predetermined shape by a hot forging device. It refers to a molding material that has been molded into ⁇ Heating process>
  • a preheated material to be hot forged is heated to a hot forging temperature in a heating furnace.
  • the raw material before heating is not particularly limited to ingots, billets, rough ground, powder compacts, etc., but the most effective materials of the present invention are ingots, billets, etc. that are formed into desired shapes by free forging.
  • This preheated material is heated to the hot forging temperature in a heating furnace.
  • the heating temperature differs depending on the material of the raw material before heating. Also, if it is a Ti alloy, the temperature should be 900 to 1180°C.
  • a "heat-resistant heat-insulating material adhering process" is applied after the heating process. In the heat-resistant insulating material adhering step, a heat-resistant insulating material is adhered to the forging material taken out from the heating furnace.
  • the hot forging temperature may be set to a temperature higher by about 5 to 100° C. than the forging temperature (forging start temperature) when hot forging is started.
  • the temperature drop can be suppressed.
  • the temperature during hot forging can be kept high.
  • the material of the raw material before heating is a Ni-based superalloy
  • most of the alloy contains Cr in the range of 10 to 35% by mass. In order to suppress the reaction between oxygen and Cr in the heating furnace during the heating process, it is preferable to control the oxygen concentration in the heating furnace to 10% or less. Preferably, it is 8% or less.
  • the surface roughness of the raw material before heating is preferably rougher than that of ordinary finishing, and when the heat-resistant insulating material is adhered to the surface in the next process, a slight space is left between the heat-resistant insulating material and the forging material. It can be expected that the air in the space will function as a heat insulating layer. Then, in the glass lubricant coating step, which will be described later, the glass lubricant tends to remain on the irregularities on the surface of the raw material before heating.
  • the surface texture may be as cast or as plastically worked, but in the case of hard-to-work alloys, cracks may occur on the surface due to the influence of additive elements, so cracks may occur during hot forging.
  • the surface of the material before heating should be smoothed by machining the surface of the heat-resistant insulation material (that is, the area coated with the glass lubricant) in the next process. It is preferable to adjust the roughness to a level higher than that of finishing.
  • the material before heating is heated to a hot forging temperature, and a heat-resistant insulating material is adhered to at least a predetermined part of the surface of the forging material taken out from the heating furnace to obtain a hot forging material.
  • the portion to be adhered may be part of the surface or the entire surface. Which part of the surface of the forging material the heat-resistant and heat insulating material should be adhered should be determined by considering one of the following two factors.
  • the first method is a method of preferentially preventing a temperature drop in a portion where cracking is expected.
  • the heat-resistant insulating material to the surface within a necessary minimum range within a time period that does not impair the hot forgeability.
  • the material for hot forging is placed on the hot forging device, for example, if there is concern about heat dissipation to the lower die (lower anvil or lower tool), the lower die (lower anvil or lower tool) ), or if it has a polygonal columnar shape, it may be adhered to a range including the edge portion. If it is cylindrical, it may be adhered to its side surface.
  • the heat-resistant insulating material including the places where defects such as cracks are likely to occur by hot forging. This method is particularly effective for ⁇ ′-rich Ni-based alloys known as difficult-to-work alloys.
  • the second method is to adhere the heat-resistant heat insulating material to at least part of the surface of the freely deformable portion of the forging material.
  • the main purpose is to reduce the temperature drop.
  • This method can contribute to reduction of flaws (cracks) because the heating temperature can be sustained in alloys such as 718 alloy and Waspaloy that can be hot forged in a wide temperature range. Selection of the above method should be made in consideration of the material and shape.
  • this heat-resistant insulation material By bonding this heat-resistant insulation material, it is possible to reduce the precipitation of fine ⁇ ' due to the temperature drop of the material for hot forging, and to promote the recrystallization of the surface layer of the material for hot forging. For example, it is possible to reduce the occurrence of defects such as cracks even in a Ni-based alloy with a high ⁇ ' content, which is known as a difficult-to-work alloy.
  • a glass lubricant is allowed to exist between the heat-resistant insulating material and the bonding surface of the forging material to which it is bonded. It is preferable to keep The glass lubricant at this time mainly functions as an "adhesive". There are two ways to do this, each of which will be explained.
  • the first method is to perform a "glass lubricant coating step". This is the step involved in the present invention.
  • the glass lubricant coating step further includes a step of coating a glass lubricant in advance on at least a portion of the surface of the pre-heated material to which the heat-resistant heat insulating material is to be adhered. Since the glass lubricant can act as a heat insulating agent after the heating, it is particularly effective when performing hot forging of a difficult-to-work alloy.
  • the viscosity is preferably 5 ⁇ 10 2 Pa ⁇ s or more, more preferably 10 3 Pa ⁇ s or more. If the viscosity is too high, the hardness of the glass lubricant increases, making it difficult to exhibit the effect of adhesiveness. If the viscosity is too low, the fluidity of the glass lubricant increases, the adhesiveness decreases, and it becomes difficult for the lubricant to stay on the surface of the forging material.
  • the above environmental temperature can be used as the "hot forging temperature" in the heating process, assuming the surface temperature of the forging material when it is taken out from the heating furnace in the heat resistant insulating material bonding process. Therefore, the viscosity of the glass lubricant can be the viscosity at the above hot forging temperature. Then, this viscosity measurement can be carried out by selecting from the following two types of procedures. One method is to calculate the viscosity from the vibration amplitude when a thin flat plate is immersed in molten glass and vibrated, and measure the viscosity while lowering the temperature from a high temperature range where the viscosity is low.
  • Another method is to calculate the viscosity from the height and deformation speed of a solidified cylindrical sample when it is pressed by a parallel plate, and measure the viscosity while increasing the temperature from a low temperature range where the viscosity is high.
  • the glass lubricant according to the present invention has the above-mentioned viscosity in the step of adhering the heat-resistant insulating material, there is no particular need to specify its component composition. And, for example, it is possible to choose from existing ones.
  • the second method is to attach glass particles to the surface of the heat-resistant heat insulating material to be bonded to the forging material, and then bond the heat-resistant heat insulating material to a predetermined location.
  • This is a method that the present invention can selectively employ.
  • the glass particles are softened by the heat inherent in the surface of the forging material and adhered to each other. Therefore, it is effectively applied to hot forging such as Ni-based super heat-resistant alloys with high hot forging temperatures.
  • a method of attaching glass particles to the heat-resistant heat insulating material for example, a method of scattering glass particles on the surface of the heat-resistant heat insulating material to be bonded to the forging material, a liquid containing glass particles, and
  • coating and spraying spray coating
  • the method of applying or spraying the liquid material it is preferable to dry the heat-resistant heat insulating material to which the glass particles are adhered.
  • the method of spraying the liquid material is particularly preferable because the glass particles can be uniformly adhered to the surface of the heat-resistant heat insulating material to be bonded to the forging material.
  • the above-described "glass lubricant coating step" may be combined with "a method of adhering glass particles to the surface of the heat-resistant heat insulating material to be adhered to the forging material".
  • the heat-resistant and heat-insulating material is an inorganic fiber.
  • the "inorganic fibers" used in the present invention include glass fibers, ceramic fibers, etc., and it is preferable to select ceramic fibers that are excellent in heat insulation.
  • ceramic fibers for example, KAOWOOL (registered trademark: hereinafter referred to as "Kaowool") is particularly preferable due to its availability and low cost. If the inorganic fiber heat-resistant heat insulating material is used, even if the surface of the forging material is somewhat rough, combined with the effect of the above-mentioned glass lubricant as an adhesive, it becomes easy to adhere along the surface shape.
  • the fibers are easily caught on the unevenness of the surface of the forging material, and since they are lightweight, they can be easily adhered to the side surface of the forging material, for example.
  • the Kao wool is maintained as it is even at the initial stage of the hot forging, and the hot forging during the hot forging is performed. It can also suppress the temperature drop of the raw material. If the cow wool is placed before being charged into the heating furnace as in the conventional example, it will be easily crushed during transportation for hot forging, depending on the relationship between temperature and time.
  • a mold, an anvil, or a tool is used to compress part or all of the hot forging material into a predetermined shape.
  • the forging apparatus used is preferably a large-sized hot forging apparatus with a forging load of several thousand tons or more capable of forming a predetermined shape even for a difficult-to-work alloy.
  • the hot forging process is preferably free forging.
  • the material for hot forging in free forging is heavy, has a large area for releasing heat to the atmosphere, and requires a large amount of processing. Therefore, the effect of suppressing the temperature drop of the material for hot forging by adhering the heat-resistant heat insulating material is large.
  • the die and anvil are used in the free forging.
  • the heat-resistant heat insulating material is adhered to at least part of the surface of the free deformation portion of the forging material that does not come into contact with any of the tools.
  • Example 1 Materials before heating include 718 alloy (18.5% by mass of Cr) and Waspaloy alloy (19.5% by mass of Cr), as well as 13.5% by mass of Cr, 25.0% by mass of Co, 2.8% by mass of Mo, and 1.2% by mass of W.
  • alloy A Ti 6.2% by mass, Al 2.3% by mass, C 0.015% by mass, B 0.015% by mass, Zr 0.03% by mass, the balance being Ni and unavoidable impurities, the ⁇ ' phase is approximately 49.5% by volume
  • alloy A ⁇ ′-rich Ni-based alloy
  • both end surfaces are coated with a glass lubricant to a thickness of approximately 50 to 200 ⁇ m.
  • glass lubricant coating step When the viscosity of the glass lubricant used was measured with a vibrating viscometer according to the procedure described above, the viscosities at 1100°C and 1150°C (that is, the hot forging temperatures described below) were 1 ⁇ 10 4 Pa ⁇ , respectively. s and 3 ⁇ 10 3 Pa ⁇ s. This raw material before heating was heated to a predetermined hot forging temperature in a heating furnace (heating step).
  • the oxygen concentration at this time was controlled at 2 to 8%.
  • the heating temperature was 1100° C. for alloy A and 718 alloy, and 1150° C. for Waspaloy alloy, and the holding time was 2 to 9 hours. It took about 8 hours to raise the temperature to the hot forging temperature, and it was possible to raise the temperature to the predetermined temperature more than 10 hours earlier than in the conventional example in which the entire surface is wrapped with a heat-resistant insulating material.
  • a heat-resistant insulating material 11 was adhered to the surface of both side end surfaces of the forging material 1 taken out from the heating furnace by a manipulator to obtain a hot forging material 2 (heat-resistant insulating material bonding step).
  • Kaowool inorganic fiber
  • Kaowool inorganic fiber
  • Fig. 1 Kaowool (inorganic fiber) is used as the heat-resistant heat insulating material, and as shown in Fig. 1, it is adhered to the surface that comes into contact with the anvil or tool to suppress the temperature drop of the material for hot forging and to remove heat by contacting with the anvil or tool. was suppressed.
  • the cao wool and the forging material were bonded in a short time and without problems, so the temperature was about 5 to 10 ° C. compared to the temperature that normally drops before mounting. It was determined that there was no problem with hot forging, even though the value of the steel was reduced.
  • upset forging was performed by hot free forging. After placing the hot forging material on the lower anvil of the hot forging apparatus used and placing the upset forging tool on the upper end surface of the hot forging material, the hot forging with a pressurizing capacity of 4000 tons Free forging was performed by pressing using a forging device, and a rough material (hot forged material 3) used for hot forging in the next step was produced (hot forging step). The area other than the portion where the lower anvil and the upset forging tool were in contact with the hot forging material was a free deformation region. The forging start temperature was approximately 1000°C, and the forging temperature during hot forging was approximately 950-980°C.
  • the part in contact with the lower anvil and the part in contact with the upsetting forging tool on the upper end face side were suppressed in heat removal by Kao wool, so wrinkles at the end of the hot forged material ( Almost no surface defects such as cracks occurred.
  • Example 2 Temperature change during hot forging and flaws in the hot forged material using a Waspaloy alloy with a heat-resistant heat-insulating material adhered (Invention Example 1) and a heat-resistant heat-insulating material not adhered (Comparative Example 1) (Cracks) were compared.
  • the materials used before forging were all obtained by machining ingots to predetermined dimensions, and the surfaces thereof were made to have a surface roughness equivalent to rough finishing.
  • upsetting forging by hot free forging was performed by using a preheated material having an L/D of 1.5 or less.
  • glass lubricant coating step Prior to the heating step, as a glass lubricant coating step, about 50% glass lubricant was applied to both side end surfaces (anvil or surface in contact with the tool) of the material before heating of Inventive Example 1 and the outer peripheral surface portion to which the heat-resistant insulating material is to be adhered. It was coated with a thickness of ⁇ 200 ⁇ m (glass lubricant coating step).
  • the glass lubricant was the one used in Example 1 (viscosity 3 ⁇ 10 3 Pa ⁇ s at 1150° C. (that is, the hot forging temperature described below)). This raw material before heating was heated to a predetermined hot forging temperature in a heating furnace (heating step). The oxygen concentration at this time was controlled at 2 to 8%.
  • the heating temperature was 1150° C., and the holding time was 2 to 4 hours.
  • the heating time to the forging temperature was approximately 8 hours.
  • two sheets of Kaowool (inorganic fibers) having different lengths 11A is long and 11B is short) are stacked in a cross shape as a heat-resistant heat insulating material 11, and the present invention is removed from the heating furnace with a manipulator.
  • the forging material 1 of Example 1 was placed on the overlapped portion, and while the inorganic heat insulating material was bent in the direction of the black arrow, the heat-resistant heat insulating material was adhered to the both side end surfaces and the outer peripheral surface of the forging material.
  • the heat-resistant heat-insulating material 11B is short and has a length close to the full height of the forging material.
  • the whole was wrapped and used as a material for hot forging (heat-resistant insulating material bonding process).
  • heat-resistant insulating material bonding process it is possible to suppress the temperature drop of the material for hot forging, suppress the heat removal due to contact with the anvil or the tool, and suppress the heat removal due to contact with the grip part of the manipulator.
  • the adhesion of the glass particles to the surface of the cao wool that adheres to the forging material completes the bonding between the cao wool and the forging material in a short time without any problems. It was judged that the temperature dropped by about 5 to 10° C. compared with the temperature dropped before mounting, and that there was no problem with hot forging.
  • the forging material of Comparative Example 1 was not covered with a heat-resistant heat insulating material.
  • Hot free forging was performed using the above material for hot forging. After placing the hot forging material on the lower anvil of the hot forging apparatus used, and placing the upset forging tool on the upper end surface of the hot forging material, hot with a pressurizing capacity of 10000 tons Free forging was performed by pressing using a forging apparatus, and a rough material (hot forged material) used for hot forging in the next step was produced (hot forging step). The area other than the portion where the lower anvil and the upset forging tool were in contact with the hot forging material was a free deformation region. The forging start temperature was approximately 1050°C and the forging temperature during hot forging was approximately 1000°C.
  • Example 1 When the temperature of the material for hot forging immediately after upset forging was measured with a radiation thermometer, it was approximately 1090 to 1120°C in Example 1 of the present invention and 950 to 990°C in Comparative Example 1. Inventive Example 1 was able to keep the temperature during hot forging higher by about 100°C or more. When the state of cracks in the produced hot forged material was confirmed, the occurrence of cracks could not be visually confirmed in the hot forged material of Example 1 of the present invention, but the hot forged material of Comparative Example 1 had: Cracks that can be visually confirmed were confirmed on both end faces of the forging material that came into contact with the anvil or tool and on the side of the forging material that was gripped by the manipulator.
  • Example 3 Temperature change during forging and hot forging flaws ( Cracks) were compared.
  • the pre-heating material used was obtained by machining the material after upset forging to a predetermined size, and the surface thereof had a surface roughness equivalent to rough finishing.
  • glass lubricant Prior to the heating step, as a glass lubricant coating step, glass lubricant was coated to a thickness of approximately 50 to 200 ⁇ m on both side end surfaces of the material before heating of Example 2 of the present invention and the portion where the heat-resistant insulating material was to be adhered (glass lubrication agent coating process).
  • the glass lubricant was the one used in Example 1 (viscosity 3 ⁇ 10 3 Pa ⁇ s at 1150° C. (that is, the hot forging temperature described below)).
  • This raw material before heating was heated to a predetermined hot forging temperature in a heating furnace (heating step).
  • the oxygen concentration at this time was controlled at 2 to 8%.
  • the heating temperature was 1150° C. and the holding time was 2 to 4 hours.
  • the heating time to the forging temperature was approximately 8 hours.
  • a heat-resistant insulating material 11 is prepared, and the forging material 1 of Example 2 of the present invention taken out from the heating furnace with a manipulator is placed on the heat-resistant insulating material 11, and the heat-resistant insulating material is blackened. While bending in the direction of the arrow, a heat-resistant heat insulating material was adhered to the surface of the outer peripheral surface to obtain a material for hot forging (heat-resistant heat insulating material adhering step). Kao wool (inorganic fiber) is used as the heat-resistant heat insulating material, and as shown in Fig.
  • Hot forging was performed using the material for hot forging.
  • the side surface of the hot forging material is sandwiched between the lower anvil and the upper anvil of the hot forging device, and forging is performed by pressing using a hot forging device with a pressurizing capacity of 4000 tons, and used for hot forging in the next process.
  • a rough ground (hot forged material) was produced (hot forging process).
  • the forging start temperature was approximately 1050°C at the uncoated portion, and the forging material temperature at the location where the coating was removed during hot forging was approximately 1080-1020°C.
  • the temperature of the material for hot forging immediately after hot forging was measured with a radiation thermometer.
  • Inventive Example 2 was able to keep the temperature higher by about 50 to 80°C during hot forging.
  • hot forging material manufacturing method of the present invention even if a difficult-to-work alloy is used as a material for hot forging, hot forging can be performed efficiently while preventing defects such as cracks. is possible.

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  • Mechanical Engineering (AREA)
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Abstract

L'invention concerne un procédé de production d'un élément forgé à chaud qui permet un forgeage à chaud efficace tout en empêchant des défauts tels que des fissures, même lorsqu'un alliage difficile à usiner est utilisé en tant que matériau de forgeage à chaud.　Ce procédé de production d'un élément forgé à chaud comprend une étape de chauffage, dans laquelle un matériau non chauffé à soumettre à un forgeage à chaud est chauffé à une température de forgeage à chaud dans un four de chauffage, une étape de liaison de matériau d'isolation résistant à la chaleur, dans laquelle un matériau d'isolation résistant à la chaleur est lié à au moins une portion de la surface de matériau de forgeage retirée du four de chauffage, formant ainsi un matériau de forgeage à chaud, et une étape de forgeage à chaud, dans laquelle l'un quelconque d'un moule, une enclume et un outil est utilisé pour comprimer la totalité ou une portion du matériau de forgeage à chaud en une forme prescrite, et comprend une étape de revêtement de lubrifiant de verre, dans laquelle au moins la portion de la surface du matériau non chauffé à laquelle le matériau d'isolation résistant à la chaleur a été lié est revêtue d'un lubrifiant de verre, le lubrifiant de verre ayant une viscosité de 102-107 Pa·s dans l'étape de liaison de matériau d'isolation résistant à la chaleur.
PCT/JP2022/021761 2021-09-10 2022-05-27 Procédé de production d'un élément forgé à chaud WO2023037667A1 (fr)

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JP2023546773A JP7498443B2 (ja) 2021-09-10 2022-05-27 熱間鍛造材の製造方法
CN202280060942.1A CN117980089A (zh) 2021-09-10 2022-05-27 热锻件的制造方法
EP22866997.4A EP4400232A1 (fr) 2021-09-10 2022-05-27 Procédé de production d'un élément forgé à chaud

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JP2014508857A (ja) 2011-01-17 2014-04-10 エイティーアイ・プロパティーズ・インコーポレーテッド 表面コーティングを介しての金属合金の熱間加工性の改善
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JP2017148817A (ja) * 2016-02-22 2017-08-31 株式会社神戸製鋼所 熱間鍛造方法及び熱間鍛造品の製造方法
JP2018164925A (ja) * 2017-03-28 2018-10-25 日立金属株式会社 鍛造製品の製造方法
WO2021182606A1 (fr) * 2020-03-13 2021-09-16 日立金属株式会社 Procédé de fabrication d'élément forgé à chaud

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JPH02224841A (ja) * 1989-02-28 1990-09-06 Mitsubishi Metal Corp 耐熱合金の鍛造方法
JP2014508857A (ja) 2011-01-17 2014-04-10 エイティーアイ・プロパティーズ・インコーポレーテッド 表面コーティングを介しての金属合金の熱間加工性の改善
JP2014210288A (ja) * 2013-04-01 2014-11-13 日立金属株式会社 熱間鍛造方法
JP2017148817A (ja) * 2016-02-22 2017-08-31 株式会社神戸製鋼所 熱間鍛造方法及び熱間鍛造品の製造方法
JP2018164925A (ja) * 2017-03-28 2018-10-25 日立金属株式会社 鍛造製品の製造方法
WO2021182606A1 (fr) * 2020-03-13 2021-09-16 日立金属株式会社 Procédé de fabrication d'élément forgé à chaud

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