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Method for preparing Ni-(ta/Zr/Hf)-Re alloy powder for plasma cladding

A technology of plasma cladding and alloy powder, which is applied in melting spraying, metal material coating process, coating and other directions, can solve problems such as easy cracking, and achieve the effect of low production cost, fine grain size and regular grain shape.

Active Publication Date: 2015-08-12
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that existing cladding materials used for plasma cladding are prone to cracking under rapid prototyping multilayer cladding conditions, and Ni-(Ta / Zr / Hf)-Re alloys for plasma cladding are provided Powder Preparation Method

Method used

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  • Method for preparing Ni-(ta/Zr/Hf)-Re alloy powder for plasma cladding
  • Method for preparing Ni-(ta/Zr/Hf)-Re alloy powder for plasma cladding
  • Method for preparing Ni-(ta/Zr/Hf)-Re alloy powder for plasma cladding

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specific Embodiment approach 1

[0020] Specific embodiment one: the preparation method of the Ni-(Ta / Zr / Hf)-Re alloy powder that this embodiment is used for plasma cladding, realizes according to the following steps:

[0021] 1. Take tantalum metal plates, zirconium metal plates and hafnium metal plates, put them into the melting furnace respectively, and heat at 400°C until the superheat of the melt is 150-220°C;

[0022] 2. Inject the melt in step 1 into the water atomization system, adjust the particle size of the powder by controlling the water pressure, prepare metal powder, and dry it to obtain tantalum metal powder, zirconium metal powder and hafnium metal powder respectively;

[0023] 3. Mix lanthanum powder and cesium powder in any ratio to obtain mixed powder;

[0024] 4. Mix nickel-based powder, mixed powder with tantalum metal powder, zirconium metal powder and hafnium metal powder according to the mass percentage of 92:2:2:2:2 to obtain alloy powder, which is to complete the Ni- Preparation of ...

specific Embodiment approach 2

[0027] Embodiment 2: This embodiment is different from Embodiment 1 in that in Step 1, the melt is heated at 400°C until the superheat of the melt is 190°C. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0028] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that after the melt is injected into the water atomization system in step 2, the system parameters: the melt flow rate is 45g / s, and the high-pressure water flows from the nozzle of the atomizer Spraying, the spray angle of the atomizer nozzle focus is 30°, the pressure of high-pressure water is 50MPa, and the flow rate of high-pressure water is 5m 3 / min. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a method for preparing Ni-(ta / Zr / Hf)-Re alloy powder for plasma cladding and belongs to the technical field of coating preparation. The method for preparing NI-(ta / Zr / Hf)-Re alloy powder for plasma cladding mainly solves the problem that existing cladding materials used for plasma cladding crack easily under the rapid forming and multi-layer cladding condition. The method comprises the steps that firstly, a tantalum metal plate, a zirconium metal plate and a hafnium metal plate are obtained, and the tantalum metal plate, the zirconium metal plate and the hafnium metal plate are smelted, so that melt is obtained; secondly, the smelt is injected into a water atomization system for preparing metal powder, the powder is dried, so that tantalum metal powder, zirconium metal powder and hafnium metal powder are obtained; thirdly, lanthanum powder and caesium powder are mixed, so that mixed powder is obtained; fourthly, nickel-based powder and the mixed powder are mixed with the tantalum metal powder, the zirconium metal powder and the hafnium metal powder, and then the Ni-(ta / Zr / Hf)-Re alloy powder is obtained. A plasma cladding layer prepared from the Ni-(ta / Zr / Hf)-Re alloy powder is high in abrasion resistance, no crack sign or no tiny crack happens to the cladding layer after thermal shock is conducted 120 times, and the metallurgical bonding strength of the cladding layer and a base body is high.

Description

technical field [0001] The invention relates to a method for preparing Ni-(Ta / Zr / Hf)-Re alloy powder for plasma cladding, and belongs to the technical field of coating preparation. Background technique [0002] Plasma cladding is a multi-disciplinary new technology that integrates plasma heating and melting, material interaction in molten pool and rapid solidification forming. This technology has been studied in detail in surface treatment. It can cladding alloy powders with excellent performance on cheap base materials, which can significantly improve the wear resistance, corrosion resistance, heat resistance, oxidation resistance and electrical properties of the material surface, thereby saving a lot of precious alloy elements and having broad development prospects , is not only a research object of great interest in materials science and condensed matter physics, but also a hot spot and frontier of research in related disciplines at home and abroad. [0003] The high-tem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/08C23C4/08
Inventor 崔秀芳谭娜金国孙越靖建农郭天师
Owner HARBIN ENG UNIV