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CN-122007294-A - Method for improving utilization rate of alloy consumable ingot, forging device and application of forging device in GH4169 alloy preparation

CN122007294ACN 122007294 ACN122007294 ACN 122007294ACN-122007294-A

Abstract

The embodiment of the invention provides a method for improving the utilization rate of an alloy consumable ingot, a forging device and application thereof in GH4169 alloy preparation, and belongs to the technical field of high-temperature alloy casting. The method comprises the steps of providing an alloy consumable ingot prepared through vacuum consumable remelting, heating the alloy consumable ingot to a preset forging temperature at a preset heating rate, performing primary forging on the end part of the combined Jin Zihao ingot to form a basic clamp structure through forging and pressing and rotating, performing secondary forging on the basic clamp structure to forge the basic clamp structure into a clamp through forging and pressing, leaving defects in the central area of the end part of the alloy consumable ingot in the clamp after the primary forging and the secondary forging, and pressing pure materials surrounding the central area into the qualified area of the clamp for recycling. The invention accurately identifies end defects and locks in the cut pliers handles to retain qualified materials, and the effective utilization rate of GH4169 alloy consumable ingots is improved by 10% -15%.

Inventors

  • LI JI
  • LI WENCHAO
  • QI ZICHEN
  • ZHANG JIE
  • LIU ZHENGDONG

Assignees

  • 杭州特冶科技有限公司

Dates

Publication Date
20260512
Application Date
20260130

Claims (10)

  1. 1. A method of increasing the utilization of a consumable alloy ingot, the method comprising: providing an alloy consumable ingot prepared by vacuum consumable remelting; Heating the alloy consumable ingot to a preset forging temperature at a preset heating rate; performing primary forging on the end part of the alloy consumable ingot, and forming a basic clamp handle structure through forging and pressing and rotation; forging the basic clamp structure for the second time, forging the basic clamp structure into a clamp through forging and pressing, wherein After primary forging and secondary forging, defects in the central area of the end part of the alloy consumable ingot are remained in the clamp handle, and pure material surrounding the central area is pressed into the qualified area of the alloy consumable ingot for recycling.
  2. 2. The method of claim 1, wherein the step of determining the position of the substrate comprises, The preset heating rate is 25-35 ℃ per minute, The preset forging temperature is 1060-1100 ℃.
  3. 3. The method of claim 2, wherein the step of determining the position of the substrate comprises, Before the primary forging and the secondary forging, determining a defect distribution area of the alloy consumable ingot at the center of the end part through finite element simulation and Niyama criterion respectively; defects in the end central region of the alloy consumable ingot comprise at least one of shrinkage cavity, shrinkage porosity, slag rolling or inclusion; the threshold of Niyama criteria is set so that the defect distribution area is located inside the grip.
  4. 4. The method of claim 3, wherein the step of, After the primary forging and the secondary forging, the effective utilization rate of materials of each alloy consumable ingot used for vacuum consumable remelting is improved by 10% -15%.
  5. 5. The method according to any one of claims 1 to 4, wherein, The alloy consumable ingot is a GH4169 alloy consumable ingot; The GH4169 alloy consumable ingot has the diameter of 500-520mm and the length of 1700-1900mm; the diameter of a defect distribution area of the GH4169 alloy consumable ingot at the center of the end part is less than or equal to 200mm, and the depth is less than or equal to 250mm; the diameter of the basic clamp handle structure obtained through the primary forging is 250-350mm, and the height is 40-60mm; the diameter of the clamp handle obtained through the secondary forging is 150-250mm.
  6. 6. The method of claim 5, wherein the step of determining the position of the probe is performed, The threshold value of Niyama criterion is set to 20X (K-sec) 0.5 /cm or less.
  7. 7. A forging apparatus for improving the utilization rate of an alloy consumable ingot, the forging apparatus being for forging an alloy consumable ingot according to the method of any one of claims 1 to 6, the forging apparatus comprising: An upper anvil portion disposed above an end of the alloy consumable ingot for forging the end of the alloy consumable ingot to obtain a grip; a lower anvil part, a metal rotary disk is fixedly arranged above the lower anvil part, and the other end of the alloy consumable ingot is fixedly arranged on the metal rotary disk, wherein And a first pressure head for primary forging and a second pressure head for secondary forging are movably connected and arranged on the end face, close to the alloy consumable ingot, of the upper anvil part.
  8. 8. The forging apparatus as recited in claim 7, wherein, The first pressure head comprises two alloy inserts which are arranged on the surface of the upper anvil part in parallel; The alloy inserts are provided with preset intervals, and the preset intervals are 250-350mm; the width of the forging face of each alloy insert is 80-120mm.
  9. 9. The forging apparatus as recited in claim 7, wherein, The second pressure head is of a torus structure, and the height of the torus is 150-250mm; The center of the torus structure is provided with a truncated cone-shaped cavity penetrating through the torus structure; The truncated conical cavity comprises an upper section close to the upper anvil part and a lower section far away from the upper anvil part, wherein The diameter of the upper section is 150-250mm, The diameter of the lower section is 250-350mm, The edges of the lower section are provided with fillets, and the radius of each fillet is 80-120mm.
  10. 10. The application of the method for improving the utilization rate of the alloy consumable ingot in the preparation of GH4169 alloy is characterized in that, A GH4169 alloy consumable ingot obtained by forging by the method of any one of claims 1-6 or by the forging apparatus of any one of claims 7-9, The center region of the end of the GH4169 alloy consumable ingot is provided with a clamp handle, the defects of the GH4169 alloy consumable ingot are concentrated in the clamp handle, and pure material surrounding the center region is pressed into the qualified region of the GH4169 alloy consumable ingot for subsequent smelting processing.

Description

Method for improving utilization rate of alloy consumable ingot, forging device and application of forging device in GH4169 alloy preparation Technical Field The invention relates to the technical field of high-temperature alloy casting, in particular to a method for improving the utilization rate of an alloy consumable ingot, a forging device and application of the forging device in GH4169 alloy preparation. Background The vacuum consumable remelting (VAR) technology is a key technology for preparing high-end high-temperature alloys (such as GH4169 alloy), and has the advantages of being capable of smelting high-melting-point and high-activity metals, being difficult to generate shrinkage cavities and the like by smelting consumable electrodes in a vacuum environment and solidifying into alloy ingots in a water-cooled copper crucible. However, this process also has inherent drawbacks, particularly in the end (riser) region of the ingot. In the VAR smelting process, particularly for large-size ingots, the end part of the ingot is used as a final solidification area, and defects such as concentrated shrinkage cavities, shrinkage porosity and the like are easily formed due to insufficient feeding. Meanwhile, oxide impurities on the surface of a molten pool at the end of smelting are easily involved in the area, so that slag, harmful inclusions (such as coarse TiN) and the like are formed. In addition, the region is also subjected to a hot spot phenomenon due to the formation of an air gap between the solidified shell and the crucible, so that the local solidification structure is thick and serious in segregation. These metallurgical defects listed above can seriously impair the mechanical properties and service reliability of the alloy material. In general, to ensure the purity of the final product, a conservative strategy is generally adopted, i.e. the ends at risk of defects are entirely cut off directly after ingot formation and treated as return materials. Although the method ensures the quality of alloy products, a large amount of qualified materials (the parts without defects in the cut body) are wasted, so that the subsequent ingredients are added, and the energy consumption and the production cost are obviously increased. In view of this, a novel method for improving the utilization rate of alloy consumable ingots, a forging device and application thereof in GH4169 alloy preparation are provided to fully or partially solve the above problems. Disclosure of Invention In order to solve at least one of the above problems and defects in the prior art, embodiments of the present invention provide a method for improving the utilization rate of alloy consumable ingots, a forging apparatus and application thereof in the preparation of GH4169 alloy, by precisely identifying and defining the concentrated region of end defects of alloy consumable ingots according to simulation resetting Niyama criteria, and locking the defects inside the finally resected tongs by two-step forging, the pure qualified materials around the end portions are successfully pressed into and retained in the available ingot main body, the effective utilization rate of alloy materials is greatly improved, and the effective utilization rate of single GH4169 alloy consumable ingots is improved by about 10% -15%. The technical scheme is as follows: according to one aspect of the present invention, a method of improving the utilization of an alloy consumable ingot is provided. The method specifically comprises the following steps: providing an alloy consumable ingot prepared by vacuum consumable remelting; heating the alloy consumable ingot to a preset forging temperature at a preset heating rate; performing primary forging on the end part of the involution Jin Zihao ingot, and forming a basic clamp handle structure through forging and pressing and rotating; forging the basic clamp structure for the second time, and forging the basic clamp structure to form a clamp through forging; after primary forging and secondary forging, the defects of the central area of the end part of the alloy consumable ingot are left in the clamp handle, and pure materials surrounding the central area are pressed into the qualified area of the alloy consumable ingot for recycling. In some embodiments, the predetermined heating rate is preferably 25-35 ℃ per minute and the predetermined forging temperature is 1060-1100 ℃. In some embodiments, specifically, a defect distribution area of the alloy consumable ingot at the center of the end is determined by finite element simulation and Niyama criteria, respectively, before the primary forging and the secondary forging, the defects of the end center area of the alloy consumable ingot include at least one of shrinkage cavity, shrinkage porosity, slag inclusion or inclusion, and the threshold value of Niyama criteria is set such that the defect distribution area is located inside the clamp. In some embodiments, each alloy