Deformed nickel-based alloy and brazing process of cast Ni3Al-based alloy

A brazing process and nickel-based alloy technology, which is applied in the manufacture of tools, metal processing equipment, welding equipment, etc., can solve problems such as high cost and complex structure, achieve low equipment requirements, improve high-temperature mechanical properties, and reduce joint brittleness Effect
CN110394522AActive Publication Date: 2019-11-01HEBEI UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HEBEI UNIV OF TECH
Publication Date
2019-11-01

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Abstract

The invention relates to a deformed nickel-based alloy and a brazing process of a cast Ni3Al-based alloy. The process comprises the following steps of carrying out surface treatment on a to-be-weldedpart of a to-be-welded base material; a nickel-based brazing filler metal, a brazing flux and a gel binding agent are mixed into paste, the paste-shaped brazing filler metal is laid on the surface ofthe to-be-welded base material, the other to-be-welded base material is stacked on the brazing filler metal to obtain the lap-jointed brazing sample; placing the lap-jointed brazing sample in a clampand putting in a tube furnace; after the brazing assembly is placed in a tube furnace, introducing protective gas, then heating to 1150 -1200 DEG c in a segmented manner; performing segmented coolingafter welding, cooling to room temperature; placing the welded sample which is cooled to room temperature in a box furnace under atmospheric conditions for treatment, wherein the heat preservation temperature is 600-650 DEG c, the time is 2-4 hours, and then taking out after cooling to room temperature along with the furnace. According to the process, the oxidation of the Ni-Cr-Al-based cast Ni3Al-based high-temperature alloy can be avoided, the base material is not damaged, the components of the joint are uniform, the high-temperature resistance of the welded joint is improved, and the residual stress is reduced.
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Description

technical field

[0001] The invention relates to the technical field of superalloy welding, in particular to a deformed nickel-based alloy and a Ni-Cr-Al system Ni 3 Diffusion brazing process of Al-based cast superalloys. Background technique

[0002] The wrought nickel-based alloy GH4169 has excellent high-temperature strength, structural stability, cold and hot forming and welding performance between -253 and 650 °C, and has been widely used in hot-end components in aviation, aerospace, energy and power industries. Ni-Cr-Al cast Ni 3 Al-based superalloy (main components are: Cr: 7.4-8.2%, Al: 7.6-8.5%, Ti: 0.6-1.2, Mo: 3.5-5.5%, Fe<2%, Hf: 0.3-0.9%, W: 1.5~2.5%, the balance is Ni) is a kind of Ni that can be used for a long time at 850~1100℃ 3 Al-based superalloy, which has high strength, low density, high melting point, high specific stiffness and yield strength, and good oxidation resistance and creep resistance in a large temperature range, has a wide range of appl...

Claims

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