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A kind of preparation method of gh3625 alloy strip

A technology of alloy strip and process flow, which is applied in the field of preparation of GH3625 alloy strip, can solve problems such as deterioration of processability, unstable quality, and high difficulty, so as to reduce uneven deformation, smooth surface of strip, and reduce uneven deformation Effect

Active Publication Date: 2021-01-01
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] GH3625 alloy is a difficult-to-form material, the content of strengthening elements such as Mo and Nb in the alloy is high, the hot working temperature range is narrow, the cold working plasticity is low, and the deformation resistance is large
Both cold and hot processing are more difficult
[0006] (2) The research on the strip forming process is not systematic and the quality is unstable
For example, the amount of deformation in each pass must be controlled to a certain extent to obtain a completely recrystallized structure, but excessive deformation will cause strip hardening, performance exceeding the standard or cracking, and deterioration of processability
In addition, due to the high requirements on the dimensional accuracy and surface quality of aviation strips, even if the strips can be formed and the organizational properties are qualified, if the dimensions do not meet the specified accuracy or the surface has defects such as folds, cracks, and pits, it will still be damaged. cause the strip to be scrapped

Method used

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  • A kind of preparation method of gh3625 alloy strip
  • A kind of preparation method of gh3625 alloy strip
  • A kind of preparation method of gh3625 alloy strip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The GH3625 alloy ingot is smelted by vacuum induction and electroslag, forged into a 20mm thick slab at 1120°C, with a deformation of about 70%, heated to 1120°C and hot rolled into a 4mm strip billet, and then subjected to solution heat treatment at 1100°C for 30 minutes. After pickling, the strip was cold-rolled and annealed five times to form a 0.7mm×200mm strip. The rolling process parameters are listed in Table 1.

[0022] Table 1 Example 1 rolling process parameters

[0023]

Embodiment 2

[0025] The GH3625 alloy ingot is smelted by vacuum induction and electroslag, forged into a 20mm thick slab at 1150°C, with a deformation of about 70%, heated to 1150°C and hot rolled into a 4mm strip billet, and then subjected to solution heat treatment at 1030°C for 30 minutes. After pickling, the strip was cold-rolled and annealed for 6 times, and rolled into a 0.5mm×200mm strip. The rolling process parameters are shown in Table 2.

[0026] Table 2 Example 2 rolling process parameters

[0027]

[0028]

Embodiment 3

[0030] The GH 3625 alloy ingot is smelted by vacuum induction and electroslag, forged at 1130°C to form a 20mm thick slab with a deformation of about 70%, heated to 1130°C and hot rolled into a 4mm strip billet, and then subjected to solution heat treatment at 1020°C for 30 minutes , pickled, and then the strip was cold-rolled and annealed for 9 times, and rolled into a 0.2mm×200mm strip. The rolling process parameters are shown in Table 3.

[0031] Table 3 Example 3 rolling process parameter table

[0032]

[0033] The mechanical properties of the obtained GH3625 alloy strip are shown in Table 4:

[0034] Table 4 Mechanical properties of GH3625 alloy strip

[0035]

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Abstract

The invention belongs to the field of metal material preparation, and particularly relates to a preparation method of a GH3625 alloy strip. The technical scheme of the preparation method of the GH3625alloy strip is that the technological process comprises smelting, forging, hot rolling, solid solution heat treatment plus acid pickling, repeated cold rolling annealing and repeated finished productheat treatment, wherein the forging and hot rolling temperature ranges from 1120 DEG C to 1160 DEG C, the total deformation amount is 35%-70%, the deformation amount of each heating is 15-35%, and the solid solution treatment temperature ranges from 1050 DEG C to 1150 DEG C; In the cold rolling annealing process, the deformation amount of each pass is 20-45%, the intermediate annealing temperature ranges from 1050 DEG C to 1150 DEG C, and the final intermediate annealing and finished product treatment temperature ranges from 950 DEG C to 1030 DEG C. According to the preparation method of theGH3625 alloy strip, the deformation of a strip blank is controlled by adopting the cold rolling and annealing, so that uneven deformation can be reduced, and an uniform and appropriate tissues can beobtained, the qualified precise strip can be obtained, and higher use requirements can be met.

Description

technical field [0001] The invention belongs to the field of metal material preparation, and in particular relates to a preparation method of a GH3625 alloy strip. Background technique [0002] The GH3625 alloy is a Ni-Cr based solid solution strengthened deformed superalloy, with Cr, Mo and Nb as the main solid solution strengthening elements, and the maximum service temperature can reach 950 °C. It has been widely used abroad. The alloy has excellent comprehensive mechanical properties and can be processed into plates, rods, wires, strips and forgings. It is widely used in the manufacture of aero-engine components, aerospace structural components and chemical equipment. [0003] For the GH3625 alloy, there are several main problems: [0004] (1) Material processing is difficult: [0005] The GH3625 alloy is a difficult-to-form material. The content of strengthening elements such as Mo and Nb in the alloy is high, the hot working temperature range is narrow, the cold wor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/10C22F1/02
CPCC22F1/02C22F1/10
Inventor 曹一超信昕于广娜孙文儒宋玺玉
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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