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Powder core wire, preparing method thereof, corrosion preventing and abrasion resisting composite coating and preparing method of corrosion preventing and abrasion resisting composite coating

A technology of powder core wire and composite coating, applied in metal material coating process, coating, melt spraying and other directions, can solve the problems of high coating cost, strict control of coating preparation process and material composition.

Active Publication Date: 2020-10-13
ARMOR ACADEMY OF CHINESE PEOPLES LIBERATION ARMY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the patent application number 201210466545.2 discloses an iron-based powder core wire material and a coating preparation method for arc spraying to prepare an amorphous wear-resistant and corrosion-resistant coating, which overcomes the brittleness of the traditional amorphous coating, The shortcomings of not being suitable for engineering applications, the prepared amorphous coating has high hardness, good wear resistance and corrosion resistance, which can improve the performance of metal structures and parts in severe corrosive wear environments and prolong service life
However, the arc spraying technology needs to strictly control the oxidation and crystallization transition temperature of the molten powder in the process of preparing amorphous coatings, which is very strict on the coating preparation process control and material composition control.
At the same time, the formation of amorphous coatings requires the addition of various precious and rare metals, and the coating costs are high
On the other hand, the combination of the arc sprayed coating and the substrate is a mechanical combination, which is not suitable for surface protection of moving parts under impact and heavy load conditions, such as non-enclosed gear transmissions of large marine equipment and ships

Method used

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  • Powder core wire, preparing method thereof, corrosion preventing and abrasion resisting composite coating and preparing method of corrosion preventing and abrasion resisting composite coating
  • Powder core wire, preparing method thereof, corrosion preventing and abrasion resisting composite coating and preparing method of corrosion preventing and abrasion resisting composite coating
  • Powder core wire, preparing method thereof, corrosion preventing and abrasion resisting composite coating and preparing method of corrosion preventing and abrasion resisting composite coating

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preparation example Construction

[0050] In the present invention, the modified silicate mineral is preferably prepared, and the preparation method of the modified silicate mineral preferably includes the following steps: heat-treating the silicate mineral to obtain the modified silicate mineral. In the present invention, the heat treatment temperature is preferably 300-700°C, more preferably 400-600°C, most preferably 500°C, and the heat treatment time is preferably 2-3 hours, more preferably 2.5 hours. In the present invention, after the heat treatment of the silicate minerals, the layered silicate minerals are freed from crystallization water and interlayer water, and at the same time the specific surface area and interfacial reactivity of the modified silicate minerals are improved to promote The progress of the friction reaction is conducive to the self-repair and performance enhancement of the worn surface damage.

[0051] In the present invention, the silicate minerals will release a large amount of ac...

Embodiment 1

[0071] This example follows figure 1 The technological process for preparing anti-corrosion and wear-resistant composite coatings, the specific steps are as follows:

[0072] Preparation of powder core wire:

[0073] according to figure 2 Process flow for preparing powder core wire. The details are as follows: heat-treat attapulgite mineral fibers (0.2-1 μm in length and 30-100 nm in diameter) at 500° C. for 2 hours to obtain modified attapulgite mineral fibers;

[0074] Mix 3.5 parts of B (with a particle size of 2-20 μm and a purity of 95%), 0.8 parts of C (graphite powder with a particle size of 5-10 μm and a purity of 99.9%), and 4 parts of Si (with a particle size of 2-6.5 μm and a purity of 99%) %), 8 parts of Cr (particle size 10-20 μm, purity 99%), 15 parts Ni (particle size 37-74 μm, purity 99%), 10 parts Zn (particle size 20-44 μm, purity 99%) , 3 parts of Al (with a particle size of 20-44 μm and a purity of 99%), 0.3 parts of CeO 2 (with a particle size of 1 μ...

Embodiment 2

[0086] The powder core wire material is prepared according to the preparation method of Example 1, the difference is that the following raw material ratio is adopted: 4 parts of B, 1 part of C, 4.5 parts of Si, 10 parts of Cr, 16.5 parts, 11 parts of Zn, 4 parts Al), 0.3 parts CeO 2 and 4 parts heat-treated attapulgite mineral fiber;

[0087] Carry out pretreatment to substrate according to the substrate pretreatment method of embodiment 1;

[0088] Prepare anti-corrosion and wear-resistant composite coating according to the method of embodiment 1, the difference is that the spraying distance of high-speed arc spraying is 180mm; the induction heating power density of high-frequency induction remelting is 35W / mm 2 , The scanning speed of the induction coil is 150mm / min.

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Abstract

The invention belongs to the technical field of surface engineering, and particularly relates to a powder core wire, a preparing method thereof, a corrosion preventing and abrasion resisting compositecoating and a preparing method of the corrosion preventing and abrasion resisting composite coating. The provided powder core wire comprises a skin and a powder core. The material of the skin is stainless steel. By mass percent, the powder core accounts for 30-40% of the powder core wire. By weight, the powder core comprises following components including 2.5-4.5 parts of B, 0.6-1 part of C, 3-4.5 parts of Si, 8-12 parts of Cr, 15-18 parts of Ni, 10-12 parts of Zn, 3-5 parts of Al, 0.3-0.5 part of CeO2 and 3-5 parts of silicate minerals. The powder core wire is utilized for obtaining the corrosion preventing and abrasion resisting composite coating through high-speed electric arc spraying and high-frequency induction remelting, and the obtained corrosion preventing and abrasion resistingcomposite coating combines good abrasion resistance and corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of surface engineering, and in particular relates to a powder core wire material and a preparation method thereof, an anti-corrosion and wear-resistant composite coating and a preparation method thereof. Background technique [0002] Wear and corrosion are the main forms of material failure, especially moving parts will produce more serious wear and corrosion in corrosive media. For example, all kinds of pumps, valves, transmissions, exploration equipment, mining equipment and fasteners under vibration conditions under the underwater or coastal conditions, under the dual action of corrosive medium and friction load, they are subjected to corrosion and wear conditions, resulting in The coupling damage problem of corrosion and wear is very serious. [0003] At present, high-speed arc spraying technology is often used for corrosion protection of equipment steel structures. Most of the arc sprayed coatings prep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/06C23C4/131C23C4/18
CPCC23C4/06C23C4/18C23C4/131
Inventor 于鹤龙王红美宋占永尹艳丽周新远张仲魏敏汪勇史佩京张伟
Owner ARMOR ACADEMY OF CHINESE PEOPLES LIBERATION ARMY
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