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Plasma cladding in-situ synthesized TiB2-TiC-TiN reinforced high-entropy alloy coating material and preparation method thereof

A tib2-tic-tin, plasma cladding technology, applied in metal material coating process, coating, melt spraying and other directions, can solve the problems of low hardness and uneven structure distribution of high-entropy alloy coating, and achieve the realization of high-entropy alloy coating. The matching of hardness and toughness, easy implementation, and the effect of overcoming pollution

Active Publication Date: 2014-01-01
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the problems of low hardness and uneven structure distribution of CoCrCuFeNi high-entropy alloy coatings prepared by plasma cladding in the past, the purpose of the present invention is to provide a kind of plasma cladding in-situ self-generated TiB 2 -TiC-TiN enhanced high-entropy alloy coating material and its preparation method, the structure of the coating prepared by plasma cladding technology is composed of FCC phase matrix and TiB 2 -TiC-TiN ternary ceramic phase composition, the average Vickers hardness of the coating is as high as 1104Hv

Method used

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  • Plasma cladding in-situ synthesized TiB2-TiC-TiN reinforced high-entropy alloy coating material and preparation method thereof
  • Plasma cladding in-situ synthesized TiB2-TiC-TiN reinforced high-entropy alloy coating material and preparation method thereof
  • Plasma cladding in-situ synthesized TiB2-TiC-TiN reinforced high-entropy alloy coating material and preparation method thereof

Examples

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Embodiment 1

[0019] Example 1: A Plasma Cladding In-Situ Autogenerated TiB 2 -TiC-TiN reinforced high entropy alloy coating material and its preparation method:

[0020] (1) The composition of the high-entropy alloy coating material is: Co 17%, Cr17%, Fe 17%, Ni 17%, Mn 17%, Ti 10%, B 4 C 2 % and BN 3 %.

[0021] (2), the steps of the high-entropy alloy coating preparation method are as follows:

[0022] (a) Substrate pre-treatment: first cut the low-carbon steel plate into a plate of 40×60×8mm, and then use a grinding wheel to polish the surface of the steel plate to remove the oxide layer until it reveals a metallic luster; then the polished steel plate is Degreasing cleaning, using acetone solution to clean in ultrasonic waves, the temperature during cleaning is 25 ° C; after cleaning, wipe the surface of the steel plate with alcohol and dry it in a drying box for subsequent use;

[0023] (b) Prepare the high-entropy alloy coating raw material: accurately weigh the coating raw mate...

Embodiment 2

[0027] Example 2 : A kind of plasma cladding in situ self-generated TiB 2 -TiC-TiN reinforced high entropy alloy coating material and its preparation method:

[0028] (1) The composition of the high-entropy alloy coating material is: Co 18%, Cr18%, Fe 18%, Ni 18%, Mn 18%, Ti 7%, B 4 C 1 % and BN 2 %.

[0029] (2), the steps of the high-entropy alloy coating preparation method are as follows:

[0030] (a) Substrate pretreatment: first cut the low-carbon steel plate into a plate of 50×70×8mm, and then use a grinding wheel to polish the surface of the steel plate to remove the oxide layer until it reveals a metallic luster; then the polished steel plate is Degreasing cleaning, using acetone solution to clean in ultrasonic waves, the temperature during cleaning is 25 ° C; after cleaning, wipe the surface of the steel plate with alcohol and dry it in a drying box for subsequent use;

[0031] (b) Prepare high-entropy alloy coating raw materials: accurately weigh the coating raw m...

Embodiment 3

[0035] Example 3: A Plasma Cladding In-Situ Autogenerated TiB 2 -TiC-TiN reinforced high entropy alloy coating material and its preparation method:

[0036] (1) The composition of the high-entropy alloy coating material is: Co 19%, Cr19%, Fe 19%, Ni 19%, Mn 19%, Ti 3%, B 4 C 0.5% and BN 1.5%.

[0037] (2), the steps of the high-entropy alloy coating preparation method are as follows:

[0038] (a) Substrate pretreatment: first cut the low-carbon steel plate into a plate of 60×80×8mm, and then use a grinding wheel to polish the surface of the steel plate to remove the oxide layer until it reveals a metallic luster; then the polished steel plate is Degreasing cleaning, using acetone solution to clean in ultrasonic waves, the temperature during cleaning is 25 ° C; after cleaning, wipe the surface of the steel plate with alcohol and dry it in a drying box for subsequent use;

[0039] (b) Prepare high-entropy alloy coating raw materials: accurately weigh the coating raw materia...

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Abstract

The invention discloses a plasma cladding in-situ synthesized TiB2-TiC-TiN reinforced high-entropy alloy coating material and a preparation method thereof. The coating material comprises the following components according to atomic percentage: 17-19 percent of Co, 17-19 percent of Cr, 17-19 percent of Fe, 17-19 percent of Ni, 17-19 percent of Mn, 3-10 percent of Ti, 0.5-2 percent of B4C and 1.5-3 percent of BN. The preparation method comprises the steps as follows: (a), pre-treating a substrate; (b), preparing high-entropy alloy coating raw materials; (c), mixing powder; (d), preparing the high-entropy alloy by adopting plasma cladding equipment. The organization structure of the high-entropy alloy coating comprises an FCC phase, a BCC phase and a TiB2-TiC-TiN ternary ceramic phase, and favorable metallurgy bonding between a coating and the substrate is realized; the average Vickers hardness reaches 1,104 Hv.According to the invention, on the basis of the conventional high-entropy alloy coating,a TiB2-TiC-TiN reinforced phase is synthesized in-situ,the strength, hardness and the toughness of the coating are further improved, the match between the hardness and the toughness is achieved, and the potentiality of the high-entropy alloy coating is brought into play to the greatest extent. Moreover, the preparation method is reasonable in working procedures, simple and convenient to implement, is used for preparing durable antisepsis or abrasion proof coatings, and can remarkably prolong the service life of machinery parts.

Description

[0001] technical field [0002] The invention relates to a kind of plasma cladding in-situ self-generated TiB 2 -TiC-TiN reinforced high-entropy alloy coating material and its preparation method, which belong to the field of surface engineering technology coating for material processing engineering specialty. Background technique [0003] For a long time, the traditional alloy design method is to use one or two elements as the main components, and then add other elements to improve the structure and properties of the alloy, such as stainless steel, aluminum alloy, Ni-Al and other binary intermetallic compounds. and bulk amorphous alloys. However, with the development of modern industry, people have put forward higher and higher requirements for materials in terms of operating temperature, strength, and wear resistance. Although people have developed new material processing techniques, such as rapid solidification, laser processing, etc., to improve the performance of mater...

Claims

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Application Information

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IPC IPC(8): C23C4/10C23C24/10
Inventor 程江波张保森王泽华林尽染
Owner HOHAI UNIV
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