Nickel-based composite powder for plasma spraying and preparation method of cladding coating

A composite powder and nickel-based alloy technology, applied in metal material coating process, coating, fusion spraying, etc., to achieve excellent fluidity, good purification effect, and the effect of inhibiting tissue loosening

Active Publication Date: 2020-03-24
BEIJING JUNSHAN SURFACE TECH ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 prop

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  • Nickel-based composite powder for plasma spraying and preparation method of cladding coating
  • Nickel-based composite powder for plasma spraying and preparation method of cladding coating

Examples

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[0030] Example 1

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

[0032] The specific preparation steps are:

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

Example Embodiment

[0044] Example 2

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

[0046] The specific preparation steps are:

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

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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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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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