High entropy amorphous alloy coating and preparation method thereof

An amorphous alloy and coating technology, applied in metal material coating process, coating and other directions, can solve the problems such as the preparation of amorphous coatings by broadband lasers that have not yet been found, and achieve lower material costs, uniform and dense interior, and high amorphous The effect of content

Active Publication Date: 2020-12-01
BAOSTEEL ROLL SCI & TECH
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  • Abstract
  • Description
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Problems solved by technology

[0008] No literature reports on the preparation of amorphous coatings by broadband lasers have been found, which further indicates that the industrial preparation of amorphous coatings with high amorphous content, high hardness, and no cracks is still a blank

Method used

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  • High entropy amorphous alloy coating and preparation method thereof
  • High entropy amorphous alloy coating and preparation method thereof
  • High entropy amorphous alloy coating and preparation method thereof

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Embodiment 1）

[0033] The preparation method of the high-entropy amorphous alloy coating of the present embodiment is specifically as follows:

[0034] S1: Substrate pretreatment.

[0035] Select No. 45 steel with a size of 140mm×100mm×8mm as the substrate; sand paper to remove oxides on the surface of the substrate; ultrasonic cleaning with absolute ethanol to remove abrasive debris and oil stains on the surface of the substrate.

[0036] S2: Alloy powder preparation.

[0037] The components and mass percentages of the alloy powder in this embodiment are as follows: 30% nickel, 30% cobalt, 4% silicon, 4% boron, and the balance is iron.

[0038] Atomize pure iron powder with an iron content of 99.9wt% [see the appearance schematic diagram figure 1 Figure f in the figure], pure nickel atomized powder with a nickel content of 99.9wt% [appearance schematic diagram, see figure 1 Figure e in the figure], pure cobalt atomized powder with a cobalt content of 99.9wt% [appearance schematic diagram...

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Abstract

The invention discloses a high-entropy amorphous alloy coating and a preparation method thereof. The high-entropy amorphous alloy powder is prepared from the raw materials in percentage by weight: 28-32% of nickel, 28-32% of cobalt, 2-6% of silicon, 2-6% of boron, and the balance of iron. The preparation method comprises the following steps that matrix pretreatment is conducted; the alloy powder is prepared; and the alloy powder is laid on the pretreated matrix, a semiconductor wide band laser is used for laser cladding to obtain the high-entropy amorphous alloy coating, wherein the size of alaser focusing spot of the semiconductor wide band laser is 14mm*1.5mm. The surface of the high-entropy amorphous alloy coating is smooth, flat and free of cracks, and the interior of the high-entropyamorphous alloy coating is uniform and dense and is free of obvious hole defects. The micro-Vickers hardness of the coating is more than 400HV0.1, the highest is 729.5HV0.1, and the average is 582.9HV0.1. The coating phase structure is simple FCC phase and BCC phase. The amorphous content can be up to 64. 3%.

Description

technical field [0001] The invention belongs to the technical field of amorphous coatings, and in particular relates to a high-entropy amorphous alloy coating and a preparation method thereof. Background technique [0002] With the rapid development of high-power lasers, laser processing technology using laser as a heat source has become more mature and widely used in various fields of material processing. Among them, laser cladding technology can quickly melt the cladding material added on the surface of the substrate into a molten pool, and quickly solidify to obtain a high-performance cladding layer that has a metallurgical bond with the substrate. Key technologies for intelligent manufacturing / remanufacturing with huge potential economic and social benefits. [0003] At present, the laser cladding materials that have been studied in depth mainly include nickel-based alloys, cobalt-based alloys, iron-based alloys, ceramics and composite materials, among which relatively ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C23C24/10
CPCC22C30/00C22C38/02C22C38/105C22C2200/02C23C24/106
Inventor 陈伟孙博韩剑程江波胡现龙徐锟张秦
Owner BAOSTEEL ROLL SCI & TECH
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