GH4145 alloy forging and preparation method thereof

A technology of GH4145 and forgings, applied in the field of GH4145 alloy forgings and their preparation, can solve the problems of easily causing defects, large thermal stress, and large temperature gradients on the surface and core of GH4145 alloys, and achieves improved yield, strong hot workability, The effect of element segregation elimination

Pending Publication Date: 2022-08-02
JIANGXI BAOSHUNCHANG SPECIAL ALLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a preparation method of GH4145 alloy forgings, so as to solve the problem of large temperature gradient between the surface and the core of the GH4145 alloy in the forging process in the above conventional preparation method, large thermal stress, and easy to cause defects

Method used

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  • GH4145 alloy forging and preparation method thereof

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preparation example Construction

[0033] The invention provides a preparation method of a GH4145 alloy forging, comprising the following steps:

[0034] S1: Staged heating of steel ingots: place GH4145 nickel-based alloy steel ingots on cast iron and add them to the furnace, the first stage of heating, the temperature of the steel ingot is raised to 580-620 ° C and maintained, the second stage of heating, the temperature of the steel ingot is raised to 880-920 ℃ and heat preservation; and before the GH4145 nickel-based alloy ingot is added to the furnace, the temperature is lower than 300 ℃;

[0035] S2: Diffusion annealing: the ingot treated by S1 is heated to 1150-1250°C and kept warm;

[0036] S3: Cooling and rewarming of steel ingot: Cool the steel ingot after S2 treatment to 1020-1070℃, then return to 1160-1180℃ and keep it for a period of time;

[0037] S4: Billeting of steel ingots: The steel ingots treated by S3 are processed for unrolling and billeting, and the temperature of final forging is control...

Embodiment 1

[0060] Forging of GH4145 Alloy Forgings

[0061] S1: Staged heating of steel ingots: Place GH4145 alloy steel ingots on cast iron with a size of 200mm*200mm*1500mm and add them to the furnace. The first stage is heated, and the steel ingots are raised to 580°C at a rate of 100°C / hour and kept for 3 hours. , the second stage of heating, the temperature of the ingot is raised to 880°C at a rate of 100°C / hour and kept for 2.5 hours;

[0062] S2: Diffusion annealing: the ingot treated by S1 is heated to 1150°C at a rate of 150°C / hour and kept for 20 hours;

[0063] S3: Cooling and rewarming of steel ingot: Cool the steel ingot after S2 treatment to 1020°C, then return to 1160°C and keep it for 5 hours;

[0064] S4: Billeting of steel ingots: The steel ingots treated in S3 are released from the furnace for billeting treatment, the four sides of the steel ingots are patted and rounded, and then the steel ingots are flattened by a heavy hammer in one direction. The method processes...

Embodiment 2

[0070] Forging of GH4145 Alloy Forgings

[0071] S1: Staged heating of steel ingots: Place GH4145 alloy steel ingots on cast iron with a size of 200mm*200mm*1500mm and add them to the furnace. The first stage is heated, and the steel ingots are raised to 620°C at a speed of 100°C / hour and kept for 3 hours. , the second stage of heating, the temperature of the ingot is raised to 920°C at a rate of 100°C / hour and kept for 2.5 hours;

[0072] S2: Diffusion annealing: the ingot treated by S1 is heated to 1250°C at a rate of 150°C / hour and kept for 20 hours;

[0073] S3: Cooling and rewarming of the steel ingot: The steel ingot treated with S2 is cooled to 1070°C, then returned to 1180°C and kept for 5 hours;

[0074] S4: Billeting of steel ingots: The steel ingots treated in S3 are released from the furnace, and the four sides of the steel ingots are tapped and rounded, and then the steel ingots are flattened by a heavy hammer in one direction. The method processes the steel ing...

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Abstract

The invention provides a GH4145 alloy forge piece and a preparation method thereof.The preparation method comprises the following steps of S1, segmented heating of a steel ingot, S2, diffusion annealing, S3, cooling and temperature returning of the steel ingot, S4, cogging of the steel ingot, S5, remelting heating for the first time, S6, forging of the steel ingot for the first time, S7, remelting heating for the second time, and S8, forging of the steel ingot for the second time. The GH4145 alloy forge piece prepared through the preparation method is good in plasticity and high in fission resistance and has high popularization value and commercial value.

Description

technical field [0001] The invention relates to the field of alloy production, in particular to a GH4145 alloy forging and a preparation method thereof. Background technique [0002] GH4145 alloy is mainly a nickel-based superalloy with γ"[Ni3(Al,Ti,Nb)] phase for aging strengthening. GH4145 alloy has good corrosion resistance and oxidation resistance below 980℃. Creep resistance, high strength below 800 °C, high strength below 600 °C, good relaxation resistance below 540 °C, and good formability and welding performance, the alloy is mainly It is used to manufacture plane springs and coil springs that are resistant to relaxation and require high strength for aero-engines that work below 800 °C, and can also be used to manufacture gas turbine turbine blades and other parts. Available varieties include plates, strips, bars, and forgings , Rings, Wire and Tube. [0003] However, the GH4145 superalloy contains extremely high alloying elements, which will form element segregati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J1/04B21J1/06C22C19/05C22F1/10
CPCB21J1/04B21J1/06C22C19/058C22F1/10
Inventor 廉斌季宏伟施军
Owner JIANGXI BAOSHUNCHANG SPECIAL ALLOY CO LTD
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