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Iron-based amorphous powder and preparation method and application thereof

An iron-based amorphous and powder technology, which is applied in metal material coating process, melt spraying, coating and other directions, can solve the problems of amorphous coating polycrystalline phase and unreasonable powder composition design, and achieve thermal stability. High performance, excellent cavitation resistance, and the effect of improving the ability of amorphous formation and stability

Active Publication Date: 2016-12-07
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to the characteristics of high efficiency and good quality, the preparation of iron-based amorphous coatings by thermal spraying has attracted widespread attention from scholars at home and abroad. However, due to the unreasonable design of powder components, the prepared amorphous coatings often contain relatively Many crystal phases

Method used

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  • Iron-based amorphous powder and preparation method and application thereof
  • Iron-based amorphous powder and preparation method and application thereof
  • Iron-based amorphous powder and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] An iron-based amorphous powder, the powder is composed of the following elements, the weight percentage of each element is as follows: 20wt% Cr, 4.5wt% B, 0.625wt% C, 1.875wt% Si, 2.5wt% Cu, 5wt% Ni, 15wt% Mo, 3wt% Co, the balance being Fe.

[0042] The preparation method of iron-based amorphous powder, comprises the steps:

[0043] (1) Put the block raw materials into the induction induction furnace according to the calculated ratio, put the high melting point on the lower part, and put the low melting point on the upper part, and heat to 2350 ℃ to melt all the materials;

[0044] (2) Water atomize the molten metal, the water atomization pressure is 9 MPa, and then dry the powder for 3 hours;

[0045] (3) Sieve the powder between 325 mesh and 800 mesh and vacuum seal it.

[0046] The application of the prepared iron-based amorphous powder in the preparation of the iron-based amorphous coating comprises the following steps:

[0047] (1) Pretreatment of the surface of...

Embodiment 2

[0051] An iron-based amorphous powder, the powder is composed of the following elements, the weight percentage of each element is as follows: 20wt% Cr, 3.6wt% B, 0.5wt% C, 1.5wt% Si, 2.5wt% Cu, 5wt% Ni, 15wt% Mo, 3wt% Co, the balance being Fe.

[0052] The preparation method of iron-based amorphous powder, comprises the steps:

[0053] (1) Put the block raw materials into the induction induction furnace according to the calculated ratio, put the high melting point on the lower part, and put the low melting point on the upper part, and heat to 2350 ℃ to melt all the materials;

[0054] (2) Water atomize the molten metal, the water atomization pressure is 10 MPa, and then dry the powder for 3 hours;

[0055] (3) Sieve the powder between 325 mesh and 800 mesh and vacuum seal it.

[0056] The application of the prepared iron-based amorphous powder in the preparation of the iron-based amorphous coating comprises the following steps:

[0057] (1) Pretreatment of the surface of th...

Embodiment 3

[0060] An iron-based amorphous powder, the powder is composed of the following elements, the weight percentage of each element is as follows: 20wt% Cr, 2.7wt% B, 0.375wt% C, 1.125wt% Si, 2.5wt% Cu, 5wt% Ni, 15wt% Mo, 3wt% Co, the balance being Fe.

[0061] The preparation method of iron-based amorphous powder, comprises the steps:

[0062] (1) Put the block raw materials into the induction induction furnace according to the calculated ratio, put the high melting point on the lower part, and put the low melting point on the upper part, and heat to 2350 ℃ to melt all the materials;

[0063] (2) Water atomize the molten metal, the water atomization pressure is 8 MPa, and then dry the powder for 3 hours;

[0064] (3) Sieve the powder between 325 mesh and 800 mesh and vacuum seal it.

[0065] The application of the prepared iron-based amorphous powder in the preparation of the iron-based amorphous coating comprises the following steps:

[0066] (1) Pretreatment of the surface of...

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Abstract

The invention discloses iron-based amorphous powder and a preparation method and application thereof. The powder comprises the following elements in percentages by weight: 17-23wt% of Cr, 2.7-4.5wt% of B, 0.3-1wt% of C, 0.5-2.5wt% of Si, 2-3wt% of Cu, 3-8wt% of Ni, 12-18wt% of Mo, 2-4wt% of Co and the balance of Fe. The preparation method comprises the following steps: adding raw materials in an induction electromagnetic furnace, heating and melting; and carrying out water atomization on molten metal, then drying, and screening powder. According to the application of the iron-based amorphous powder in preparation of an anti-cavitation and corrosion-resistant iron-based amorphous powder coating, the coating is prepared by a supersonic flame spraying technology, and the surface of a matrix is subjected to oil removal and rust removal treatment, and then is subjected to pretreatment such as sand blasting. The coating which is low in porosity, high in hardness, excellent in anti-cavitation property and excellent in corrosion resistance can be obtained. The iron-based amorphous powder is suitable for demanding components such as marine hydraulic machinery, key components of nuclear submarines, parts of engines of airplanes, and bosses of blades of aviation engines, particularly has advantages in a severe marine environment, facilitates industrialization, and is wide in application prospect.

Description

technical field [0001] The invention belongs to the thermal spraying field of material processing engineering, and in particular relates to an iron-based amorphous powder, a preparation method and application thereof. Background technique [0002] The flow-passing parts of hydraulic machinery such as water turbines and pumps are often subject to the combined effects of cavitation, corrosion and other factors in the marine environment, causing the surface metal of the flow-passing parts to lose and form a honeycomb surface with protrusions and pits, resulting in the failure of hydraulic machinery. The working efficiency is reduced and the service life is shortened. At present, the method of coating the surface of wetted parts to improve the performance of the workpiece has received widespread attention. [0003] Amorphous materials exhibit a series of excellent physical properties, mechanical properties, formability and chemical properties due to their completely uniform com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/02C23C4/067C23C4/129
CPCC22C45/02
Inventor 吴玉萍乔磊洪晟
Owner HOHAI UNIV
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