A kind of method for preparing nickel base alloy

A nickel-based alloy and alloy technology, which is applied in the field of laser cladding forming to prepare nickel-based alloys, can solve the problems of unsatisfactory requirements, powder work hardening, poor powder fluidity, etc., and achieves strong designability, high density and low cost. Effect

Active Publication Date: 2021-12-14
UNIV OF SCI & TECH BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

When preparing ODS nickel-based alloys by mechanical alloying process, Al, Ti, Cr and other elements are easily oxidized in the process of mechanical alloying, which reduces the final alloy properties
At the same time, during the high-energy ball milling process, the powder, the ball milling medium and the ball milling tank will collide at high speed, and the long-term ball milling will cause the elements in the ball milling medium and the ball milling tank to be introduced into the target powder to cause pollution, which will affect the final material properties
Finally, the powder obtained by mechanical alloying is severely work-hardened, and most of them are irregularly shaped powders with poor powder fluidity. Only some special methods can be used, such as jacketed hot extrusion, jacketed hot isostatic pressing or spark plasma sintering. Can not meet the powder requirements of laser cladding forming technology

Method used

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  • A kind of method for preparing nickel base alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Element

[0050] Ni-12wt.%Cr-6wt.%Al-1wt.%Ti-4wt.%Mo-2wt.%Nb-0.25wt.%La 2 o 3 Preparation of nickel base alloy

[0051] Argon atomized powder and nano La 2 o 3 The powder is weighed with a weight ratio of 99.75:0.25 for later use. Dissolve the weighed argon atomized powder of Ni-12wt.%Cr-6wt.%Al-1wt.%Ti-4wt.%Mo-2wt.%Nb in 5g·L -1 Polydiallyldimethylammonium chloride solution, soaked for 15 minutes, and then the nano-La 2 o 3 The powder was added into the solution and stirred for 1.5 hours, and then the solution was dried to obtain a powder precursor. Stir the powder precursor for 1 hour in an argon atmosphere at a temperature of 320° C. and a stirring propeller rotation speed of 20,000 rpm to obtain nano-oxide-coated nickel-based alloy powder. Finally, the nickel-based alloy powder is wrapped with nano-oxide for laser cladding forming. The forming parameters are powder coating thickness 0.03mm, scanning speed 1000mm / s, and scanning distance 0.05mm to obtain ODS ...

Embodiment 2

[0053] Element

[0054] Ni-18wt.%Cr-21wt.%Fe-1wt.%Co-0.6wt.%Al-1wt.%Ti-3wt.%Mo-5wt.%Nb-0.4wt.%La 2 o 3 Preparation of nickel base alloy

[0055] Will be composed as

[0056] Argon atomized powder and nano La 2 o 3 The powder is weighed with a weight ratio of 99.6:0.4 for future use. Dissolve the weighed argon atomized powder of Ni-18wt.%Cr-21wt.%Fe-1wt.%Co-0.6wt.%Al-1wt.%Ti-3wt.%Mo-5wt.%Nb in 8g·L -1 Polydiallyldimethylammonium chloride solution, soaked for 30 minutes, and then the nano-La 2 o 3 After the powder was added into the solution and stirred for 2 hours, the solution was dried to obtain a powder precursor. Stir the powder precursor for 1 hour in an argon atmosphere at a temperature of 350° C. and a stirring propeller rotation speed of 25,000 rpm to obtain nano-oxide-coated nickel-based alloy powder. Finally, the nickel-based alloy powder is wrapped with nano-oxide for laser cladding forming. The forming parameters are powder coating thickness 0.05mm, scanni...

Embodiment 3

[0058] Composition Ni-20wt.%Cr-0.3wt.%Al-0.5wt.%Ti-0.1wt.%Fe-0.6wt.%Y 2 o 3 Preparation of nickel base alloy

[0059] Argon atomized powder and nano-Y 2 o 3 The powder is weighed with a weight ratio of 99.4:0.6 for future use. Dissolve the weighed Ni-20wt.%Cr-0.3wt.%Al-0.5wt.%Ti-0.1wt.%Fe argon atomized powder in 4g·L -1 cysteine ​​solution, soaked for 10 minutes, and then the nano-Y 2 o 3 After the powder was added into the solution and stirred for 2 hours, the solution was dried to obtain a powder precursor. Stir the powder precursor for 1 hour in an argon atmosphere at a temperature of 500° C. and a stirring propeller rotating at 20,000 rpm to obtain nano-oxide-coated nickel-based alloy powder. Finally, the nickel-based alloy powder is wrapped with nano-oxide for laser cladding forming. The forming parameters are powder coating thickness 0.03mm, scanning speed 2500mm / s, and scanning distance 0.03mm to obtain ODS nickel-based alloy products with the target shape.

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Abstract

The invention belongs to the research field of preparation of advanced metal materials, and in particular provides a method for preparing nickel-based alloys by laser cladding. Nickel-based alloy powder is added to the solution and soaked for a period of time, and then the nano-Y 2 o 3 or La 2 o 3 One of the powders is added to the solution for stirring and then the solution is dried. Preparation of nano-oxide-coated nickel-based alloy powder: Put the precursor powder obtained in the first step into a high-speed stirring heating furnace, and under the condition of atmosphere protection, carry out high-speed stirring at a certain temperature to obtain a nano-oxide-coated nickel-based alloy powder. The nickel-based alloy powder coated with nano-oxide is laser cladding formed into an oxide dispersion-strengthened nickel-based alloy. The invention provides a new idea for preparing the oxide dispersion strengthened nickel base alloy, and has the advantages of short production cycle, low cost, convenient operation and the like.

Description

technical field [0001] The invention belongs to the research field of preparation of advanced metal materials, and in particular provides a method for preparing nickel-based alloys by adopting laser cladding forming. Background technique [0002] Nickel-based superalloys generally use the ordered phase γ′-Ni 3 Al undergoes precipitation precipitation strengthening. However, as the temperature increases, the γ′ phase will be coarsened and the strengthening effect will be weakened. When the temperature exceeds the dissolution temperature of the γ′ phase, the γ′ will re-dissolve in the austenite matrix, thus losing the effect of precipitation strengthening. Unlike the precipitation of precipitated phases, which are limited by the use temperature, nano-oxides have higher thermal stability and will not dissolve even when heated to a temperature close to the melting point of the alloy. Therefore, at 0.7T m It still has excellent high temperature creep performance, fatigue perfo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C1/10C22C19/05C22C32/00
CPCC22C1/05C22C19/056C22C19/058C22C32/0026
Inventor 章林陈晓玮刘烨陈旭秦明礼曲选辉
Owner UNIV OF SCI & TECH BEIJING
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