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A kind of preparation method of mcraly alloy material with uniform distribution of yttrium element

A technology for alloy materials and uniform elements, applied in the field of surface engineering, can solve problems such as excessive oxide doping, Y-enriched oxide interface defects, etc., to promote powder sintering, uniform distribution of yttrium elements, suppress excessive doping and The effect of the formation of a large number of interfacial defects

Active Publication Date: 2022-05-27
SHANGHAI JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of MCrAlY alloy material with uniform distribution of yttrium element, which is used to realize the method of uniform distribution of Y in the alloy, and solves the problem of excessive doping of Y-enriched oxides in the oxide layer and Y The formation of enriched oxide interfacial defects is two important issues

Method used

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  • A kind of preparation method of mcraly alloy material with uniform distribution of yttrium element
  • A kind of preparation method of mcraly alloy material with uniform distribution of yttrium element
  • A kind of preparation method of mcraly alloy material with uniform distribution of yttrium element

Examples

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Effect test

Embodiment 1

[0032] Put a total of 100g of commercial NiCrAlY spray powder with a particle size of 46-85μm into a vacuum glove box, and put it into a 250ml ball mill jar under argon atmosphere protection. The ball mill jar needs to be protected by argon gas. The composition ratio of the powder is Ni 47.5 wt %; Co 23 wt %; Cr 17 wt %; Al 12 wt %; Y 0.5 wt %.

[0033] The commercial MCrAlY spray powder was ball milled by a planetary ball mill. The rotation speed of the ball mill is 400 rpm, the ball milling time is 24 hours, the ball-to-material ratio is 12:1, and the balls are high-hardness 440C stainless steel balls. And in the ball milling process, stop for 20 minutes every hour to prevent the temperature from being too high.

[0034] The ball milled powder prepared by ball milling is subjected to spark plasma sintering. Under vacuum conditions, the temperature is raised to 1050°C at a heating rate of 100°C / min, the holding time is 10 minutes under a pressure of 50 MPa, and the cooling ...

Embodiment 2

[0038] Put a total of 200g of commercial NiCrAlY spray powder with a particle size of 46-85μm into a vacuum glove box, and put it into a 250ml ball mill jar under argon atmosphere protection. The ball mill jar needs to be protected by argon gas. The composition ratio of the powder is Ni 47.5 wt %; Co 23 wt %; Cr 17 wt %; Al 12 wt %; Y 0.5 wt %.

[0039] The commercial MCrAlY spray powder was ball milled by a planetary ball mill. The rotational speed of the ball mill was 400 rpm, the ball milling time was 24 hours, and the ball-to-material ratio was 10:1. And in the ball milling process, stop for 20 minutes every hour to prevent the temperature from being too high.

[0040] The ball milled powder prepared by ball milling is subjected to spark plasma sintering. Under vacuum conditions, the temperature is raised to 1050°C at a heating rate of 100°C / min, the holding time is 10 minutes under a pressure of 50 MPa, and the cooling time is 30 minutes, and then the MCrAlY alloy with ...

Embodiment 3

[0044] A total of 200 g of commercial NiCrAlY spray powder with a particle size of 46-85 μm (the composition ratio of the powder is Ni 47.5wt%; Co23wt%; Cr 17wt%; Al 12wt%; Y 0.5wt%) was put into a stainless steel vacuum ball mill, and then High-hardness 440C stainless steel balls were added at a ratio of 5:1 to the ball-to-material ratio, and a stearic acid seat ball milling medium with a ratio of 0.05 wt.% was added at the same time. The loaded ball mill jar was moved into the vacuum glove box, and washed three times with high-purity argon gas. The sealed ball mill jar is fixed on the planetary ball mill, and the ball mill is carried out; the rotation speed of the ball mill is 300 rpm, and the ball milling time is 96 hours. And every hour in the ball milling process, stop for 20 minutes to prevent the temperature from being too high;

[0045] Sieve the ball-milled NiCoCrAlY powder to a particle size range of 45-75 μm, put the sieved powder into a graphite abrasive tool with...

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Abstract

The invention relates to a preparation method of an MCrAlY alloy material with uniform distribution of yttrium elements. The MCrAlY alloy material with uniform distribution of yttrium elements is prepared by ball milling commercialized MCrAlY spray powder and performing discharge plasma sintering. Yttrium as Ni‑Y nano-precipitates and Y 2 o 3 The nanoparticles are uniformly distributed in the alloy matrix, and the alloy has extremely low oxidation rate and excellent resistance to peeling off of the oxide layer. Compared with the prior art, the invention has the advantages of simple and easy method, greatly improved homogenization degree of yttrium element and the like.

Description

technical field [0001] The invention belongs to the technical field of surface engineering, and relates to an MCrAlY alloy material with uniform distribution of yttrium element and a preparation method thereof. Background technique [0002] Thermal barrier coating MCrAlY (M=Ni, Co or Ni+Co) is a cladding material that is widely used in aero-engines, gas turbine blades and other heat-resistant parts to improve the high-temperature oxidation resistance and thermal corrosion resistance of the parts. , so as to effectively prolong the service life of heat-resistant components. [0003] Among them, the proper doping of active element yttrium plays a crucial role in improving the oxidation performance of MCrAlY: it can combine with S in the superalloy matrix or the bonding layer, prevent the segregation of S to the interface between the oxide layer and the bonding layer, and inhibit the interface. Degradation of bonding properties; and can quickly diffuse to the interface between...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22C1/04B22F9/04B22F3/105
Inventor 张晗陆杰李玲刘轩溱赵晓峰郭芳威范晓慧
Owner SHANGHAI JIAOTONG UNIV
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