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Preparation method for iron-based amorphous/nanocrystalline composite coatings

A nanocrystalline composite, iron-based amorphous alloy technology, applied in the direction of manufacturing tools, welding equipment, welding equipment, etc., can solve the problems of thin coating, porosity, low bonding strength of thermal spray coating and substrate, etc., to achieve the preparation process Simple and easy, good thermal stability

Inactive Publication Date: 2013-06-05
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the thermal spraying method is widely used in the preparation of amorphous / nanocrystalline composite coatings, but there are still shortcomings such as low bonding strength between the thermal sprayed coating and the substrate, thin coating, and pores.

Method used

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  • Preparation method for iron-based amorphous/nanocrystalline composite coatings
  • Preparation method for iron-based amorphous/nanocrystalline composite coatings
  • Preparation method for iron-based amorphous/nanocrystalline composite coatings

Examples

Experimental program
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Effect test

Embodiment 1

[0016] 1. Preparation of iron-based amorphous / nanocrystalline composite coating

[0017] Preparation of iron-based amorphous surfacing electrode: using iron-based amorphous alloy Fe 41 co 7 Cr 15 Mo 14 C 15 B 6 Y 2 (atomic percent) as the welding core, with a diameter of 2.0mm; according to the coating performance requirements, the composition of the surfacing electrode coating is designed, and the quality factor of the coating is K b =0.6, the composition (mass percentage) of the coating is as follows: marble 45%, fluorite 26%, titanium dioxide 3%, soda ash 1.5%, medium carbon ferromanganese 3.5%, titanium ferromanganese 12%, 45 ferrosilicon 2%, Quartz 7%.

[0018] Reasonable surfacing welding process parameters were formulated, and surfacing welding was carried out on the surface of Q235 steel to obtain an iron-based amorphous / nanocrystalline composite coating. Surfacing welding process parameters are shown in Table 1:

[0019] Table 1 Surfacing process parameters o...

Embodiment 2

[0028] Using the iron-based amorphous surfacing electrode in Example 1, adjust the arc surfacing process parameters, and carry out the surfacing test on the Q235 steel surface. The surfacing process parameters are shown in Table 2:

[0029] Table 2 Surfacing process parameters of iron-based amorphous / nanocrystalline composite coating

[0030]

[0031] A well-formed amorphous / nanocrystalline composite coating was obtained, with a crystallinity of 40.61%, an amorphous phase content of 59.39%, and a nanocrystalline grain size of about 80nm.

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Abstract

The invention relates to a preparation method for iron-based amorphous / nanocrystalline composite coatings. The method includes: (1) preparing iron-based amorphous surfacing electrodes: core wires are made of Fe41Co7Cr15Mo14C15B6Y2 (by atomic percentage) iron-based amorphous alloy with the diameter of 2-5mm, the coverings are low-hydrogen-and-sodium, and the quality factor K of the coverings is 0.6; (2) carrying out surfacing on the surface of Q235 steel with a manual arc surfacing method, wherein the technological parameters of the surfacing are as follows: direct current reverse polarity is used, the welding voltage U is 20-30V, the welding current is 40-100A, the welding speed is 5-12.0mm / s, the argon flow is 16-25L / min, and then the iron-based amorphous / nanocrystalline composite coatings are obtained. The method is reliable in principle and convenient to operate. The optimal technological parameters are obtained through exploration, and the iron-based amorphous / nanocrystalline composite coatings prepared with the manual arc surfacing method have good heat stability.

Description

technical field [0001] The invention relates to a preparation method of an iron-based amorphous / nanocrystalline composite coating, which has excellent thermal stability and belongs to the field of preparation methods of materials. Background technique [0002] Due to the short-range order and long-range disorder of the atomic arrangement of the amorphous alloy, there are no defects such as grain boundaries, segregation, and precipitates of crystalline materials, and exhibit isotropy. This structure determines that it has excellent properties that many crystalline metals do not have, such as high hardness, high strength and excellent wear resistance and corrosion resistance. However, amorphous alloys are limited in their scope of application due to their metastable states in structure and thermodynamics, as well as thermal stability problems in use. Iron-based amorphous alloy not only has high amorphous forming ability and cost performance, but also can obtain amorphous / nano...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/04B23K35/365B23K35/40B23K35/30
Inventor 王斌周翠杨振武斌周培山演给张先菊朱洪亮
Owner SOUTHWEST PETROLEUM UNIV