Preparation method of nickel-based alloy composite powder for plasma spraying and cladding coating

A technology of composite powder and nickel-based alloy, which is applied in the direction of metal material coating process, coating, fusion spraying, etc.

Active Publication Date: 2020-10-30
BEIJING JUNSHAN SURFACE TECH ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a kind of preparation method of nickel-based composite powder for plasma spraying and the cladding coating prepared by above-mentioned composite powder, to solve the defect of existing composite coating proposed in the background technology, thereby improve hydraulic prop piston The bonding force, hardness, wear resistance, corrosion resistance and crack sensitivity of the cladding coating on the rod surface increase the service life of the hydraulic prop piston rod

Method used

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  • Preparation method of nickel-based alloy composite powder for plasma spraying and cladding coating
  • Preparation method of nickel-based alloy composite powder for plasma spraying and cladding coating

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A nickel-based composite powder for plasma spraying is prepared from the following raw materials in parts by weight: 70 parts of nickel-based alloy powder, 1 part of ceria powder, 2 parts of aluminum oxide powder, and 5 parts of silicon carbide powder.

[0032] Concrete preparation steps are:

[0033] (1) Using radio frequency induction plasma spheroidization equipment, the 60μm nickel-based alloy powder Ni60A is sprayed into the plasma torch through the feeding gun with Ar as the carrier gas. The powder absorbs a large amount of heat instantly and melts and spheroidizes. The spherical droplets are rapidly cooled and solidified in the argon atmosphere, and finally the nickel-based alloy powder is collected at the bottom of the spheroidization reactor. The spheroidization parameters are center gas Ar flow rate: 10L / min, sheath gas N 2 Flow rate: 20L / min, carrier gas Ar flow rate: 30L / min, power: 10kW, powder feeding rate: 30g / min; collect nearly spherical nickel-based a...

Embodiment 2

[0045] A nickel-based composite powder for plasma spraying is prepared from the following raw materials in parts by weight: 80 parts of nickel-based alloy powder, 2 parts of cerium dioxide powder, 5 parts of aluminum oxide powder, and 10 parts of silicon carbide powder.

[0046] Concrete preparation steps are:

[0047] (1) Using radio frequency induction plasma spheroidization equipment, the 75μm nickel-based alloy powder Ni35A is sprayed into the plasma torch through the feeding gun with Ar as the carrier gas. The powder absorbs a large amount of heat instantly and melts and spheroidizes. The spherical droplets are rapidly cooled and solidified in the argon atmosphere, and finally the nickel-based alloy powder is collected at the bottom of the spheroidization reactor. The spheroidization parameters are center gas Ar flow rate: 15L / min, sheath gas N 2 Flow rate: 30L / min, carrier gas Ar flow rate: 45L / min, power: 15kW, powder feeding rate: 50g / min; collect nearly spherical nic...

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Abstract

The invention relates to nickel-based composite powder for plasma spraying. The nickel-based composite powder is prepared from the following raw materials in parts by weight: 70-80 parts of nickel-based alloy powder, 1-2 parts of cerium dioxide powder, 2-5 parts of aluminum oxide powder and 5-10 parts of silicon carbide powder. The powder is treated by radio frequency induction plasma spheroidizing equipment and then is mechanically and uniformly mixed to obtain the nearly spherical nickel-based composite powder. The invention further discloses a method for manufacturing a cladding coating ofa hydraulic prop piston rod by plasma spraying. Through treatment of the radio frequency induction plasma spheroidizing equipment and optimization of plasma spraying process parameters, the bonding strength and hardness are high, the wear resistance and corrosion resistance are good, and the cracking sensitivity of the cladding coating is reduced; and the service life of the hydraulic prop pistonrod is prolonged. Meanwhile, the method can also be applied to protection of other parts.

Description

technical field [0001] The invention belongs to the coating field, and in particular relates to a nickel-based alloy composite powder for plasma spraying and a method for preparing the cladding coating thereof. Background technique [0002] Under the pressure of hydraulic oil, the piston rod of the hydraulic support column frequently moves back and forth. The working conditions in the mine are harsh, the relative humidity is high, and there are corrosive media such as sulfide, which makes the surface of the piston rod of the hydraulic support column extremely vulnerable to corrosion; It will produce fine coal stones that will rub against the surface of the piston rod, which will affect the service life of the hydraulic support. Every year, a large number of hydraulic support column piston rods are invalidated and scrapped due to corrosion and wear, so it is necessary to improve their surface corrosion resistance and wear resistance. [0003] Patent CN103866221A discloses a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/03C22C32/00C23C4/134C23C4/06C23C4/073C23C4/02B22F1/00
CPCB22F1/0003C22C19/03C22C32/0005C23C4/02C23C4/06C23C4/073C23C4/134
Inventor 王爱平
Owner BEIJING JUNSHAN SURFACE TECH ENG
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