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Preparation method of material increase manufactured nickel-based high-temperature alloy reserved with Laves phase

A nickel-based superalloy and additive manufacturing technology, applied in metal material coating process, coating and other directions, can solve the problem that excellent high temperature performance is not fully exerted, achieve excellent room temperature tensile mechanical properties, improve material utilization rate , the effect of excellent high temperature mechanical properties

Active Publication Date: 2016-05-04
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, the excellent high-temperature performance of the Laves phase has not been fully exploited

Method used

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  • Preparation method of material increase manufactured nickel-based high-temperature alloy reserved with Laves phase
  • Preparation method of material increase manufactured nickel-based high-temperature alloy reserved with Laves phase
  • Preparation method of material increase manufactured nickel-based high-temperature alloy reserved with Laves phase

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preparation example Construction

[0031] Described GH4169 superalloy preparation method, its equipment comprises:

[0032] (A) GH4169 superalloy substrate or stainless steel substrate;

[0033] (B) Argon-filled inert atmosphere processing chamber;

[0034] (C) high-energy beam as a heat source;

[0035] (D) Conveying system for synchronously feeding GH4169 superalloy powder;

[0036] (E) CNC system;

[0037] (F) Heat treatment device.

[0038] The specific methods are described in the following examples.

Embodiment 1

[0040] using CO 2 The laser is a high-energy beam additive manufacturing equipment to prepare GH4169 superalloy.

[0041] In the 4kW axis fast-flow continuous CO equipped with five-axis four-linkage CNC machining machine 2 Research on preparation of GH4169 superalloy on laser additive manufacturing equipment. Stainless steel is selected as the substrate, and GH4169 spherical powder with a particle size of -80 to +325 mesh prepared by the plasma rotating electrode method is selected as the raw material for laser additive manufacturing. High-purity argon with a purity of 99.99% is selected as the protective gas and powder conveying gas. The resulting additively manufactured bulk GH4169 superalloy on a stainless steel substrate like Figure 8 shown.

[0042] The first step: put the GH4169 superalloy with a particle size of -80 to +325 mesh into the powder feeder.

[0043] Step 2: Put the stainless steel substrate into the argon-filled inert atmosphere processing chamber an...

Embodiment 2

[0065] using CO 2 Laser for high energy beam additive manufacturing equipment to repair GH4169 superalloy. The obtained block GH4169 superalloy is additively manufactured on the GH4169 superalloy substrate like Image 6 shown.

[0066] In the 4kW axis fast-flow continuous CO equipped with five-axis four-linkage CNC machining machine 2 GH4169 superalloy repair research on laser additive manufacturing equipment. The forged GH4169 superalloy was selected as the substrate, and the GH4169 spherical powder with a particle size of -80 to +325 mesh prepared by the plasma rotating electrode method was selected as the raw material for laser additive manufacturing. High-purity argon with a purity of 99.99% is selected as the protective gas and powder conveying gas.

[0067] The first step: put the GH4169 superalloy with a particle size of -80 to +325 mesh into the powder feeder.

[0068] Step 2: Put the forged GH4169 superalloy into the argon-filled inert atmosphere processing roo...

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Abstract

The invention provides a preparation method of a material increase manufactured nickel-based high-temperature alloy reserved with the Laves phase. GH4169 high-temperature alloy with the Laves phase distributed in a dispersed particle shape is prepared through the preparation method, and compared with industrial forged and cast isometric crystal high-temperature alloy, the high-temperature mechanical properties, especially the high-temperature creep property, the high-temperature endurance life and the like are greatly improved. The preparation method comprises the following steps that firstly, in a processing rood, GH4160 high-temperature alloy powder or wire materials are processed through a high-energy beam heat source to be continuously melted and deposited on a base plate, so that the GH4169 high-temperature alloy reserved with the Laves phase is prepared; secondly, the prepared GH4169 high-temperature alloy reserved with the Laves phase is naturally cooled in the processing room and taken out after the temperature of the GH4169 high-temperature alloy is below 100 DEG C; and thirdly, two stages of heat treatment is conducted on the GH4169 high-temperature alloy which is taken out of the processing and reserved with the Laves phase in sequence, the first stage is completed by conducting heat preservation for 8-24 hours under the condition that the GH4169 high-temperature alloy is heated to the temperature of 700-740 DEG C, then the second stage is completed by cooling the GH4169 high-temperature alloy to the temperature below 600-640 DEG C along with a heat preservation furnace and then conducting heat preservation for eight hours, and finally air cooling is conducted till the indoor temperature is reached, so that the material increase manufactured nickel-based high-temperature alloy reserved with the Laves phase is obtained.

Description

technical field [0001] The invention relates to the field of metal material preparation and advanced manufacturing, in particular to a preparation method for additively manufacturing nickel-based superalloys with Laves phase retained. Background technique [0002] Superalloys have the characteristics of high service temperature, high stress resistance, and good corrosion resistance. They are widely used in key components such as aero engines, industrial gas turbines, aerospace structures, and nuclear reactors. GH4169 (American brand Inconel718) superalloy is the most widely used nickel-based superalloy, which is usually used to manufacture high-performance parts with high value and complex structure. [0003] The Laves phase is the weak link in the deformation of the GH4169 superalloy under long-term high-temperature service conditions, which provides a channel for the initiation and propagation of cracks. The academic paper "The Effect of Heat Treatment on the Microstructu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/10C23C24/10B22F3/105
CPCB22F3/105C22F1/10C23C24/103
Inventor 陈静隋尚樊恩想谭华林鑫黄卫东
Owner NORTHWESTERN POLYTECHNICAL UNIV
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