Coating material and preparation method thereof

A coating material and coating technology, applied in the field of alloys, can solve problems such as wear, aggravated coupling, poor friction compatibility and self-lubricating performance

Active Publication Date: 2012-06-20
SUZHOU UNIV
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Problems solved by technology

[0003] At present, commonly used composite materials are nickel-based, iron-based, cobalt-based alloys, and some carbide reinforcement phases (such as tungsten carbide, chromium carbide, titanium carbide, etc.) are added. Although these high-temperature, high-hardness wear-resistant materials or coatings are greatly It greatly improves the hardness and high temperature wear resistance of the workpiece itself, but at the same time, in many cases, it intensifies the wear of the counterpart, that is, the friction compatibility or self-lubricating performance of the partner is poor, which in many cases It is very harmful and not allowed, so the composite material coating should not only have excellent high temperature wear resistance, but also have certain high temperature antifriction performance

Method used

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  • Coating material and preparation method thereof
  • Coating material and preparation method thereof

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preparation example Construction

[0042] The invention provides a method for preparing a coating material. Take 14-17.5 parts by weight of nickel, 3-3.5 parts by weight of chromium, 49-52.5 parts by weight of chromium carbide, and 25-30 parts by weight of tungsten disulfide, and pulverize After mixing with adhesive, coating and drying, laser cladding under the protection of inert gas can be obtained; the inert gas can be nitrogen or argon.

[0043] In some embodiments provided by the present invention, in the preparation method of the coating material provided by the present invention, the binder is methyl cellulose or phenolic resin.

[0044] In some other embodiments provided by the present invention, in the preparation method of the coating material provided by the present invention, the adhesive is 2123 phenolic resin, which is formed by polycondensation of phenol and formaldehyde under the action of an acidic catalyst.

[0045] In some embodiments provided by the present invention, in the preparation method...

Embodiment 1

[0059] Take 14 parts by weight of nickel, 3.2 parts by weight of chromium, 51 parts by weight of chromium carbide, and 25 parts by weight of tungsten disulfide, and pulverize them to obtain a powder mixture. Use 2123 phenolic resin as binder, mix with the above powder mixture, coat on the surface of austenitic stainless steel, bake and dry.

[0060] Inert gas is blown to the molten pool to avoid surface oxidation of the molten pool, and a single-channel CO with a power of 1.0kW is used 2 Laser irradiation coating, that is. The rectangular spot size of the laser is 6mm×3mm, and the scanning speed is 5mm / s. After testing, the prepared austenitic stainless steel coating mainly includes Cr 7 C 3 , γ-(Fe, Ni), (Cr, W)C complex carbides and a small amount of WS 2 and CrS.

Embodiment 2

[0062] Take 17.5 parts by weight of nickel, 3.5 parts by weight of chromium, 49 parts by weight of chromium carbide, and 30 parts by weight of tungsten disulfide, and pulverize them to obtain a powder mixture. Use methyl cellulose as binder, mix with the above powder mixture, coat on the surface of austenitic stainless steel, bake and dry.

[0063] Blow inert gas to the molten pool to avoid oxidation of the surface of the molten pool, and use multi-channel overlapping CO with a power of 1.5kW 2 Laser irradiation coating, that is. The rectangular spot size of the laser is 6mm×3mm, the scanning speed is 4mm / s, and the overlapping rate of the multi-channel overlapping laser is 30%.

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Abstract

The invention relates to the alloy field, and particularly relates to a coating material and a preparation method thereof. The coating material comprises the following raw materials: 14-17.5 parts by weight of nickel, 3-3.5 parts by weight of chromium, 49-52.5 parts by weight of chromium carbide, 25-30 parts by weight of tungsten disulfide. The coating material prepared by laser cladding has good antifriction wear resistant performance at room temperature (20 DEG C) to 600 DEG C, and can effectively increase the antifriction wear resistant performance of a substrate at a high temperature.

Description

technical field [0001] The invention relates to the field of alloys, in particular to a coating material and a preparation method thereof. Background technique [0002] Austenitic stainless steel refers to stainless steel with austenitic structure at room temperature. When the steel contains about 18% Cr, 8% to 10% Ni, and about 0.1% C, it has a stable austenite structure. Austenitic chromium-nickel stainless steel includes the famous 18Cr-8Ni steel and the high Cr-Ni series steel developed on the basis of increasing Cr and Ni content and adding Mo, Cu, Si, Nb, Ti and other elements. Austenitic stainless steel (0Cr18Ni9) has been widely used in chemical, automotive, construction, medical, food and other fields because of its good corrosion resistance, heat resistance, low temperature strength and mechanical properties. Restricted by shortcomings such as low strength and poor wear resistance, they generally cannot be used as moving parts at high temperatures. Since wear ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/02C22C30/00C23C24/10
Inventor 刘秀波杨茂盛何祥明郑晨王明娣傅戈雁石世宏陈正
Owner SUZHOU UNIV
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