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Cobalt-based alloy composite powder for plasma spray and preparation method of fusion covering coating

A technology of composite powder and cobalt-based alloy, which is applied in metal material coating technology, coating, metal processing equipment, etc., to achieve the effect of promoting loose structure, improving corrosion resistance, uniform and compact structure

Active Publication Date: 2020-03-27
王爱平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of cobalt-based composite powder for plasma spraying and the cladding coating prepared by the above-mentioned composite powder, to solve the defects of the existing composite coating proposed in the background technology, thereby improving the 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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  • Cobalt-based alloy composite powder for plasma spray and preparation method of fusion covering coating
  • Cobalt-based alloy composite powder for plasma spray and preparation method of fusion covering coating

Examples

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Effect test

Embodiment 1

[0031] A cobalt-based composite powder for plasma spraying is prepared from the following raw materials in parts by weight: 100 parts of cobalt-based alloy powder, 5 parts of yttrium trioxide powder, 7 parts of titanium boride powder, and 12 parts of chromium carbide powder.

[0032] The specific preparation steps are:

[0033] (1) Using radio frequency induction plasma spheroidization equipment, 65μm Stellite 6 cobalt-based alloy powder was sprayed into the plasma torch with Ar as the carrier gas through the feeding gun, and the powder instantly absorbed a lot of heat and melted and spheroidized , the spherical droplets are rapidly cooled and solidified in an argon atmosphere, and finally the cobalt-based alloy powder is collected at the bottom of the spheroidization reactor. The spheroidization parameters are the center gas Ar flow: 10L / min, sheath gas N 2 Flow rate: 40 L / min, carrier gas Ar flow rate: 30 L / min, power: 20 kW, powder feeding rate: 25 g / min; collected nearly ...

Embodiment 2

[0045] A cobalt-based composite powder for plasma spraying is prepared from the following raw materials by weight: 110 parts of cobalt-based alloy powder, 4 parts of yttrium trioxide powder, 10 parts of titanium boride powder, and 10 parts of chromium carbide powder.

[0046] The specific preparation steps are:

[0047] (1) Using radio frequency induction plasma spheroidization equipment, 55μm Stellite 6 cobalt-based alloy powder was sprayed into the plasma torch with Ar as the carrier gas through the feeding gun, and the powder instantly absorbed a lot of heat and melted and spheroidized , the spherical droplets are rapidly cooled and solidified in an argon atmosphere, and finally the cobalt-based alloy powder is collected at the bottom of the spheroidization reactor. The spheroidization parameters are the center gas Ar flow: 7L / min, sheath gas N 2 Flow rate: 30 L / min, carrier gas Ar flow rate: 25 L / min, power: 25 kW, powder feeding rate: 30 g / min; collected nearly spherical...

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Abstract

The invention relates to cobalt-based alloy powder for plasma spray. The cobalt-based composite powder is prepared from the following raw materials in parts by weight: 90-120 parts of cobalt-based alloy powder, 3-5 parts of yttria powder, 7-12 parts of titanium boride powder and 10-15 parts of chromium carbide powder; the powder is mechanically and uniformly mixed after being treated by radio frequency induced plasma balling equipment to obtain subsphaeroidal cobalt-based composite powder; and the invention further discloses a method for manufacturing a hydraulic prop piston rod fusion covering coating by plasma spray. High bonding strength and hardness, good abrasive resistance and corrosion resistance and reduced cracking sensibility of the fusion covering coating are obtained through the treatment of the radio frequency induced plasma balling equipment and the optimization of plasma spray technological parameters; and the service life of a hydraulic prop piston rod is prolonged. Meanwhile, the cobalt-based composite powder can further be applied to the protection of other parts.

Description

technical field [0001] The invention belongs to the field of coatings, and in particular relates to a preparation method of a cobalt-based alloy composite powder for plasma spraying and a cladding coating. Background technique [0002] Under the pressure of hydraulic oil, the piston rod of the hydraulic support rod moves back and forth frequently, and 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 cause friction between the fine coal grinding stone and the surface of the piston rod, thereby affecting the service life of the hydraulic support. Every year, a large number of hydraulic support column piston rods fail due to corrosion and wear, so it is necessary to improve their surface corrosion resistance and wear resistance. [0003] Patent CN103866221A discloses a remanufacturing pro...

Claims

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Application Information

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IPC IPC(8): C23C4/134C23C4/06C23C4/02C23C4/073B22F9/14B22F1/00
CPCC23C4/134C23C4/06C23C4/02C23C4/073B22F9/14B22F1/065
Inventor 王爱平
Owner 王爱平
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