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GH4169 superalloy introduction:

GH4169 is a precipitation reinforced nickel base superalloy, has excellent DAO comprehensive properties in the range of -253 ~ 650℃ temperature ZHI degree, the tensile strength of 650℃ is the first deformation superalloy, and has excellent fatigue relief, radiation resistance, oxidation resistance, corrosion resistance. And excellent production and processing performance, excellent welding performance. It is widely used in aerospace, nuclear power generation, petrochemical industry and stamping die within the temperature range.

GH4169 superalloy features:

Another characteristic of superalloy GH4169 was investigated is aluminium alloy is very sensitive to heat treatment process, to grasp the aluminum alloy phase solubility and dissolution of regularity and institutions and the performance of the craft, the inner link, for different application rules to develop effective and practicable technique specification, you can get to consider different compressive strength level and application of various parts. The kinds of supply are cast steel parts, forging bar, rolling bar, cold bar, cake, ring, plate, belt, wire, pipe, etc. It can be made into disk, ring, leaf, shaft, standard parts and vibration isolators, plate parts, casing and other parts for long-term application in airlines.

Chemical composition of GH4169 superalloy

C: ≤0.08, Cr: 17.0~21.0, Ni: 50~55.0, Co: ≤1.0, Mo: 2.80~3.30, Al: 0.30~0.70, Ti: 0.75~1.15, Fe: residual

Rules and regulations for heat treatment of GH4169 superalloy:

GH4169 superalloy has different heat treatment regulations to manipulate grain size, δ appearance, distribution, and total amount to obtain different levels of structural mechanical properties. Aluminum alloy heat treatment rules and regulations are divided into 3 categories:

ⅰ :(1010~1065)℃±10℃, 1h, oil cooling, air cooling or water cooling +720℃±5℃, 8h, 50℃/h furnace cooling to 620℃±5℃, 8h, air cooling.

The passivation treatment of raw materials solved by this regulation has no δ phase in dislocation and in crystal, which has vacancy sensitivity, but it is beneficial to improve impact properties and resist ultra-low temperature hydrogen embrittlement.

ⅱ :(950~980)℃±10℃, 1h, oil cooling, air cooling or water cooling +720℃±5℃, 8h, to 50℃/h furnace cooling to 620℃±5℃, 8h, air cooling.

ⅲ : 720℃±5℃, 8h, 50℃/h furnace cooling to 620℃±5℃, 8h, air cooling.

After the solution of this regulation, the ratio of δ in raw materials is less, which can improve the compressive strength and impact properties of raw materials. This regulation is also known as the Immediate Time-sensitive Heat treatment regulation.

GH4169 superalloy process:

The smelting process of GH4169 superalloy can be divided into three categories: vacuum pump magnetic induction electroslag remelting; Vacuum pump magnetic induction vacuum pump electric solitary remelting; Vacuum pump magnetic induction and electroslag remelting and vacuum pump electric arc remelting. The smelter process can be selected according to the application requirements of the parts, and the application requirements can be considered.

GH4169 superalloy application and provisions:

Manufacturing all kinds of stationary and rotating parts for aerospace and aerospace engines, such as discs, rings, casing, shafts, leaves, standard parts, vibration isolators, natural gas hoses, sealing components and welding parts; Production and manufacture of nuclear power industry production use of a variety of vibration isolators and layers; It manufactures components and other components for use in the oil and chemical industries.

In recent years, the scientific research on the aluminum alloy continues to advance and the use of the aluminum alloy continues to develop basically, in order to ensure quality and control costs, the development trend of many processes: vacuum pump electric arc remelting selection of helium refrigeration process, reasonable relief of niobium shrinkage; Choose the spray forming process to produce ring parts, control the cost and reduce the production cycle; Selection of super plastic molding process, expand the scope of production and manufacturing of goods.

Effect evaluation of GH4169 superalloy:

The turbocharged disc, oil rejection plate, general motor rotor, shaft, standard parts and other parts manufactured with the alloy have been in accordance with the diesel engine commonly used model specifications, diesel engine zero and component tests according to the overrotation, cracking, low cycle system fatigue test; According to the evaluation of the long term (service life) trial operation of the high platform and the first flight delivery, the design scheme and application requirements have been fulfilled.