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Aging heat treatment process for efficiently strengthening nickel-based superalloy

A nickel-based superalloy and aging heat treatment technology, applied in the field of superalloys, can solve the problems of insufficient mechanical properties of single-phase nickel-based superalloys, high cost, time-consuming second-phase structure, etc. The effect of speeding up the generation efficiency

Active Publication Date: 2022-03-22
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to provide a high-efficiency aging heat treatment process for strengthening nickel-based superalloys. This strengthening process not only solves the problem of single-phase nickel-based superalloys in the prior art. Insufficient mechanical properties, which urgently need to be improved, also solve the time-consuming and high-cost problems of introducing the second phase structure in the prior art

Method used

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  • Aging heat treatment process for efficiently strengthening nickel-based superalloy
  • Aging heat treatment process for efficiently strengthening nickel-based superalloy
  • Aging heat treatment process for efficiently strengthening nickel-based superalloy

Examples

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Effect test

Embodiment 1

[0028] Embodiment 1: A high-efficiency aging heat treatment process for strengthening nickel-based superalloys, comprising the following steps:

[0029] S1: Machining the Inconel 625 alloy sample into a specified size to meet the needs of the box-type resistance furnace and ensure uniform heating; put refractory bricks in the furnace so that the Inconel 625 alloy can be placed in the middle of the furnace after being placed on the refractory bricks; start heating , raise the temperature to 650°C at a speed of 10°C / min, then raise the temperature to 950°C at a speed of 5°C / min, and finally raise the temperature to 1130°C at a speed of 3° / min. ) min, where, d is the direct cross-sectional area of ​​the Inconel 625 alloy, in mm;

[0030] S2: Take out the Inconel 625 alloy, put it into water for quenching, and the quenching water temperature is 20°C;

[0031] S3: put the Inconel 625 alloy after primary quenching into the furnace at 750°C again, apply tensile stress, and keep it w...

Embodiment 2

[0037] Embodiment 2: An aging heat treatment process for efficiently strengthening nickel-based superalloys, comprising the following steps:

[0038] S1: Machining the Inconel 625 alloy sample into a specified size to meet the needs of the box-type resistance furnace and ensure uniform heating; put refractory bricks in the furnace so that the Inconel 625 alloy can be placed in the middle of the furnace after being placed on the refractory bricks; start heating , raise the temperature to 650°C at a speed of 10°C / min, then raise the temperature to 950°C at a speed of 5°C / min, and finally raise the temperature to 1130°C at a speed of 3° / min. ) min, where, d is the direct cross-sectional area of ​​the Inconel 625 alloy, in mm;

[0039] S2: Take out the Inconel 625 alloy, put it into water for quenching, and the quenching water temperature is 20°C;

[0040] S3: Put the Inconel 625 alloy after primary quenching into the furnace at 750°C again, apply tensile stress, and keep it warm...

Embodiment 3

[0046] Embodiment 3: An aging heat treatment process for efficiently strengthening nickel-based superalloys, comprising the following steps:

[0047] S1: Machining the Inconel 625 alloy sample into a specified size to meet the needs of the box-type resistance furnace and ensure uniform heating; put refractory bricks in the furnace so that the Inconel 625 alloy can be placed in the middle of the furnace after being placed on the refractory bricks; start heating , raise the temperature to 650°C at a speed of 10°C / min, then raise the temperature to 950°C at a speed of 5°C / min, and finally raise the temperature to 1130°C at a speed of 3° / min. ) min, where, d is the direct cross-sectional area of ​​the Inconel 625 alloy, in mm;

[0048] S2: Take out the Inconel 625 alloy, put it into water for quenching, and the quenching water temperature is 20°C;

[0049] S3: put the Inconel 625 alloy after primary quenching into the furnace at 800°C again, apply tensile stress, and keep it warm...

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Abstract

The aging heat treatment process comprises the following steps that S1, the furnace temperature is increased to 1100-1160 DEG C, an Inconel 625 alloy is put in, heat preservation is conducted for (d * 0.6 + 30)-(d * 0.6 + 70) min, d is the straight product of the cross section of the Inconel 625 alloy, and the unit is mm; s2, the Inconel 625 alloy is taken out and put into water to be quenched, and the quenching water temperature ranges from 10 DEG C to 25 DEG C; s3, the Inconel 625 alloy subjected to primary quenching is put into the furnace at the temperature of 750 DEG C to 800 DEG C again, tensile stress is applied, heat preservation is conducted for 20 h to 40 h, and the stress level ranges from 100 MPa to 250 MPa; and S4, the Inconel 625 alloy is taken out, secondary quenching is conducted, and the quenching water temperature ranges from 10 DEG C to 25 DEG C. According to the method, the tensile stress is applied to the Inconel 625 alloy subjected to solution strengthening, creep aging heat treatment is conducted, the generation efficiency of the delta phase is improved, hundreds of and thousands of hours of heating is not needed, the practicability of the alloy is effectively improved, in the heat treatment process, due to application of the tensile stress, the forming speed of the delta phase is higher, the number of the delta phase is larger, and distribution is more uniform; the size is smaller, and the tensile strength is greatly improved.

Description

technical field [0001] The invention relates to an aging heat treatment process for efficiently strengthening a nickel-based superalloy, and belongs to the technical field of superalloys. Background technique [0002] In recent years, with the increasing propulsion ratio of aero-engines, the service environment of key components has become very harsh. Therefore, higher requirements are put forward for the high temperature strength, durability and microstructure stability of superalloys. In order to improve my country's high-temperature alloy material technology, it is necessary to strengthen the construction of high-temperature alloy manufacturing innovation system, strengthen the research and development of key common technologies of high-temperature alloys, so as to promote the healthy and sustainable development of my country's aerospace industry. [0003] Superalloys refer to a class of alloy metals based on iron, nickel, and cobalt, which can work for a long time at hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/10
CPCC22F1/10C22F1/002Y02P20/10
Inventor 樊江昆景战杰刘栩东李金山唐斌王军寇宏超袁睿豪陈彪
Owner NORTHWESTERN POLYTECHNICAL UNIV
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