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Wear-resistant and corrosion-resistant high-chromium iron-based amorphous alloy and preparation method thereof

A technology for iron-based amorphous alloys and amorphous alloys, applied in the field of iron-based amorphous alloys, can solve problems such as unfavorable industrial application, unfavorable application at high temperatures, and reduced thermal stability, and achieve excellent friction and wear resistance and corrosion resistance. Excellent performance and the effect of improving thermal stability

Active Publication Date: 2018-09-14
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the thermal stability (such as glass transition temperature) of the material is significantly reduced, which is not conducive to the application at high temperature
Patent application CN104388842B composition is Fe a Cr b Mo c B d m e R f x g (M is at least one of Ni, Mn, Co, R is at least one of Ti, Zr, Nb, Hf, Ta, W, X is at least one of Si, P), and its B content (6 <d<30) high, suitable for nuclear waste storage and transportation, high Cr content and no C make the amorphous have excellent corrosion resistance, but the amorphous formation ability is less than or equal to 3mm, which is not conducive to industrial application

Method used

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  • Wear-resistant and corrosion-resistant high-chromium iron-based amorphous alloy and preparation method thereof
  • Wear-resistant and corrosion-resistant high-chromium iron-based amorphous alloy and preparation method thereof
  • Wear-resistant and corrosion-resistant high-chromium iron-based amorphous alloy and preparation method thereof

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Embodiment 1

[0036] The main component of the iron-based amorphous alloy of the present embodiment is (Fe 0.9 Ni 0.1 ) 36 Cr 23 Mo 18 B 6 Y 2 , wherein the content of three atomic percentages (at%) of Fe, Cr and Mo are respectively 32.5±0.4, 23.0±0.7, 18.0±0.2.

[0037] The specific preparation method is as follows:

[0038] First press (Fe 0.9 Ni 0.1 ) 36 Cr 23 Mo 18 (C 0.9 P 0.1 ) 15 B 6 Y 2 The mass ratio of the amorphous alloy is used for batching;

[0039] Then, under the condition of evacuating the prepared raw materials and filling them with high-purity argon gas, the titanium ingots are arc smelted to purify the gas in the furnace, and the raw materials are smelted repeatedly for more than 5 times by adding magnetic stirring to obtain a uniform composition. alloy ingot;

[0040] Finally, put the alloy ingot above the copper mold for suction casting, heat the alloy ingot with an electric arc until it is completely melted and keep it warm for 10-20s, open the valve ...

Embodiment 2

[0044] The main component of the iron-based amorphous alloy of this embodiment is Fe 32 Cr 25 Mo 20 (C 0.9 P 0.1 ) 15 B 6 Y 2 , where the content of three atomic percentages (at%) of Fe, Cr and Mo are respectively 32.0±0.4, 25.0±0.5, and 20.0±0.2.

[0045] 4mm alloy rods were prepared using the test method described in Example 1.

[0046] The XRD of the 4mm diameter sample that present embodiment provides (as figure 1 (B)) shows that it has a fully amorphous structure; DSC analysis shows that the system has high thermal stability, the glass transition temperature Tg reaches 905K, the crystallization initiation temperature Tx reaches 955K, the original system Tg is 838K, and Tx is 896K; the system Excellent corrosion resistance, the corrosion rate in aqua regia is only 0.67mm / a, the corrosion rate in 3.5wt.% NaCl solution is only 0.0004mm / a, and the passivation current density is 2~5*10 -6 A / cm 2 (Such as figure 2 (B)), the corrosion rate of the original system in a...

Embodiment 3

[0048] The main component of the iron-based amorphous alloy of this embodiment is Fe 28 Cr 27 Mo 22 (C 0.9 P 0.1 ) 15 B 6 Y 2 , wherein the content of three atomic percentages (at%) of Fe, Cr and Mo are respectively 28.0±0.4, 27.0±0.5, 22.0±0.2.

[0049] 4mm alloy rods were prepared using the test method described in Example 1.

[0050] The XRD of the 4mm diameter sample that present embodiment provides (as figure 1 (C)) shows that it has a fully amorphous structure; DSC analysis shows that the system has high thermal stability, the glass transition temperature Tg reaches 910K, the crystallization initiation temperature Tx reaches 959K, the original system Tg is 838K, and Tx is 896K; the system Excellent corrosion resistance, the corrosion rate in aqua regia is only 0.58mm / a, the corrosion rate in 3.5wt.% NaCl solution is only 0.00035mm / a, and the passivation current density is 2~5*10 -6 A / cm2 (Such as figure 2 (C)), the corrosion rate of the original system in NaCl...

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Abstract

The invention discloses wear-resistant and corrosion-resistant high-chromium iron-based amorphous alloy and a preparation method thereof, and belongs to the field of amorphous alloy. The atomic percent expression of the iron-based amorphous alloy system is (Fe1-aNia)77-x-y-zCrxMoyCuz(C1-bPb)15B6Y2, wherein x= 23-27, y= 18-22, z= 0-8, a= 0-0.1, and b= 0-0.1. By reasonable regulation and control over the contents of Cr and Mo in the system, the thermal stability, hardness, wear resistance and corrosion resistance can be improved effectively; by further micro doping, the shear elasticity of the system can be reduced, thus, the fracture toughness of the amorphous alloy is improved to a certain degree, and wear resistance is further improved favorably; and by addition of Cu element, the amorphous alloy can have a certain antibacterial property. The method for preparing the amorphous alloy is simple. The alloy can be applied to the fields of surface engineering, marine industry, biological medicine and the like.

Description

technical field [0001] The invention belongs to the field of iron-based amorphous alloys, and more specifically relates to a high-chromium iron-based amorphous alloy with strong amorphous forming ability and excellent wear resistance and corrosion resistance. The composition can be used to prepare high-performance amorphous alloys, surface coatings and 3D printed amorphous, which is expected to promote the engineering and even large-scale application of amorphous alloys in marine chemical, surface engineering, biomedical and other fields. Background technique [0002] Iron-based amorphous alloy is a new type of high-performance metal material with high corrosion resistance and high wear resistance developed in recent years. Due to its disordered atomic arrangement and uniform structure, the iron-based amorphous alloy has a series of properties superior to traditional metal materials, such as high strength (3-5GPa), high hardness (>1000Hv) and excellent corrosion resistanc...

Claims

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Application Information

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IPC IPC(8): C22C45/02B22D18/06
CPCB22D18/06C22C33/003C22C45/02
Inventor 张诚李易诚柳林
Owner HUAZHONG UNIV OF SCI & TECH
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