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A method for preparing a full-section fine-grained gh4169 alloy diameter forged rod

A GH4169, full-section technology, which is used in the preparation of full-section fine-grained GH4169 alloy radial forging bars, can solve the problems of difficult to obtain fine grains and poor organizational uniformity, and achieve the effect of not easily falling off and ensuring consistency.

Active Publication Date: 2022-06-21
DAYE SPECIAL STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a method for preparing a full-section fine-grained GH4169 alloy diameter forged rod, so as to solve the problems that the current GH4169 alloy full-section fine-grain is difficult to obtain and the uniformity of the structure is poor

Method used

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  • A method for preparing a full-section fine-grained gh4169 alloy diameter forged rod
  • A method for preparing a full-section fine-grained gh4169 alloy diameter forged rod
  • A method for preparing a full-section fine-grained gh4169 alloy diameter forged rod

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preparation example Construction

[0040] The preparation method of the full-section fine-grained GH4169 alloy radially forged bar of the present invention specifically comprises the following steps:

[0041] Step 1, the GH4169 ingot after high temperature homogenization is forged and opened for 2-3 times, and the heating temperature is controlled to 1050-1130°C (such as 1060°C, 1070°C, 1080°C, 1090°C, 1100°C, 1110°C, 1120°C), in the process of forging and blanking, a step-by-step cooling mode is adopted between different fires. , the third fire is 1060 ± 10 ℃; the forging ratio is controlled to be ≥ 4 to prepare the diameter forging billet, and the ingot is prepared into a diameter forging billet after forging.

[0042] The high temperature homogenization treatment of GH4169 ingot adopts two-stage method, the first stage is kept at 1160±10℃, and the heat preservation time is not less than 32h, and the second stage is kept at 1195±10℃, and the heat preservation time is not less than 72h. Among them, the forgin...

Embodiment 1

[0055] This embodiment provides a method for preparing a full-section fine-grained GH4169 alloy radial forging bar, which is prepared as The GH4169 alloy bar includes the following steps:

[0056] Step 1. After high temperature homogenization The consumable ingots are forged and opened for the first fire on a 45MN or 60MN rapid forging hydraulic press, the heating temperature is controlled at 1120±10℃, the reduction amount of each hammer is controlled at 60-100mm, and the deformation amount of the first fire is ≥45% , the final forging temperature is ≥880°C, and the billet is made to 360-380mm hexagonal (that is, the cross-section of the billet is hexagonal, and the maximum length of the section is 360-380mm, the concept of the following hexagonal is similar) ;

[0057] Step 2. Perform the second forging on the billet in Step 1, and use a 45MN or 60MN rapid forging hydraulic press to elongate the billet axially. The billet is made to 260-280mm hexadecimal, and all are ret...

Embodiment 2

[0062] This embodiment provides a method for preparing a full-section fine-grained GH4169 alloy radial forging bar, which is prepared as The GH4169 alloy bar includes the following steps:

[0063] Step 1. After high temperature homogenization The consumable ingots are subjected to the first fire of one upsetting and one drawing forging on a 45MN or 60MN rapid forging hydraulic press. The final forging temperature is ≥880℃, and the billet is made to 450-480mm hexadecimal;

[0064] Step 2. Perform the second forging on the billet in Step 1, and use a 45MN or 60MN rapid forging hydraulic press to elongate the billet axially. The billet is made to 350-360mm hexagonal, the deformation is ≥40%, and the final forging temperature is ≥880℃;

[0065] Step 3. Finish the surface of the billet prepared in step 2, then put it into the furnace, control the heating temperature at 990-1020 ° C, and then keep it for 3.5 hours. Fire diameter forging into a product, the final fire deformati...

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Abstract

The invention provides a method for preparing a full-section fine-grained GH4169 alloy diameter forged bar. The preparation method includes the following steps: step 1, the GH4169 ingot subjected to high-temperature homogenization is subjected to 2-3 times of forging to open the billet, The heating temperature is controlled at 1050-1130°C, and the ingot is prepared into a radial forging billet after forging and billet opening; step 2, the radial forging billet is subjected to one-fire radial forging on a radial forging machine to prepare a GH4169 alloy radial forging rod When the material is forged by fire, the thermal insulation material is coated on the diameter forging billet. The preparation method utilizes the law of δ phase dissolution in GH4169 alloy and the effect of pinning grain boundaries, and utilizes heat-resistant and sticky insulation materials, so that the temperature drop in the billet forging process is slowed down, the forgeable time is long, the grain structure is uniform, and the edge The grain structure to the core is finer than grade 6.

Description

technical field [0001] The invention belongs to the technical field of thermal processing of metal materials, in particular to a preparation method of a full-section fine-grained GH4169 alloy radial forging bar. Background technique [0002] GH4169 alloy is a face-centered cubic γ'' (Ni 3 The solution-aged nickel-based superalloy with Nb) phase as the main strengthening phase has high tensile strength, yield strength, permanent strength and plasticity between -253 and 650 °C, as well as good corrosion resistance and radiation resistance. It is widely used in aviation, aerospace, nuclear power, re-ignition, oil field and other fields. GH4169 alloy is currently the superalloy with the largest amount, the widest use, and the most complete product types and specifications. It is a typical "one-material multi-purpose" alloy. [0003] GH4169 is a typical material with the most generalization, standardization and industrialization in aero-engines. For example, in a key mass-produ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J1/06B21J5/00
CPCB21J1/06B21J5/00
Inventor 张宏高首磊王立贾余超周立新王文革雷应华谢伟
Owner DAYE SPECIAL STEEL CO LTD
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