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Preparation method for double-layer high-strength corrosion-resistant iron-based amorphous composite coating

An iron-based amorphous and composite coating technology, which is applied in coatings, superimposed layer plating, metal material coating technology, etc., can solve problems such as low strength and insufficient wear resistance, and achieve high bonding and excellent The effects of wear and corrosion resistance, wide application prospects and use value

Inactive Publication Date: 2017-06-13
仇颖莹
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention: Aiming at the serious crystallization of the existing corrosion-resistant Fe-based amorphous alloy coating, which leads to its low strength and insufficient wear resistance, it provides an iron-based ceramic amorphous coating by plasma spraying. The middle layer is re-formed by laser cladding after the middle layer is nickel-plated, buffering the degree of crystallization, enhancing the anti-corrosion performance of the crystal, and effectively improving the anti-wear strength of the crystal. The invention melts the mixed iron-based powder and plasma Spray on the surface of stainless steel plate to form an amorphous coating with high crystallinity, then form a corrosion-resistant coating by nickel plating, then laser clad it to form an amorphous coating, pass through the middle layer with high crystallinity, Delay the secondary crystallization degree of the mixed alloy during laser cladding, effectively enhance the mechanical strength of the crystal, and have excellent corrosion resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] Select 304L stainless steel plate, and polish its surface with 4#, 8#, 12# sandpaper in turn. After the polishing is completed, wash it with absolute ethanol for 3 times, let it stand to dry at room temperature, and then place it at 120°C Under preheating treatment for 25min, the preheated stainless steel plate was prepared and set aside; respectively weigh 45 parts of iron powder, 5 parts of molybdenum with a mass content of 55% iron molybdenum powder, 2 parts of boron with a mass content of 10% iron boron powder, and 15 parts of iron dioxide Silicon and 3 parts of manganese dioxide are placed in a ball mill jar, ball milled at 350r / min for 3h, and then passed through a 300 mesh sieve to collect the mixed ball milled powder, put the mixed ball milled powder in a graphite crucible, and then place the graphite crucible at 120°C In the vacuum tube furnace, then pass argon to remove the air. Under the argon atmosphere, keep warm and preheat for 10 minutes. After the preheat...

example 2

[0020] Select 304L stainless steel plate, and polish its surface with 4#, 8#, 12# sandpaper in turn. After the polishing is completed, wash it with absolute ethanol for 4 times, let it stand to dry at room temperature, and then place it at 122°C Under preheating treatment for 27min, the preheated stainless steel plate was prepared and set aside; respectively weigh 47 parts of iron powder, 6 parts of molybdenum with a mass content of 55% iron molybdenum powder, 2 parts of boron with a mass content of 10% iron boron powder, and 17 parts of iron dioxide Silicon and 4 parts of manganese dioxide are placed in a ball mill jar, ball milled at 375r / min for 4h, and then passed through a 300 mesh sieve to collect the mixed ball milled powder, put the mixed ball milled powder in a graphite crucible, and then place the graphite crucible at 125°C In the vacuum tube furnace, then pass argon gas to remove the air. Under the argon atmosphere, heat preservation and preheating for 12 minutes. Af...

example 3

[0022] Select 304L stainless steel plate, and polish its surface with 4#, 8#, 12# sandpaper in turn. After the polishing is completed, wash it with absolute ethanol for 5 times, let it stand to dry at room temperature, and then place it at 125°C Under preheating treatment for 30min, the preheated stainless steel plate was prepared and set aside; weigh 60 parts of iron powder, 8 parts of molybdenum with a mass content of 55% ferromolybdenum powder, 3 parts of boron with a mass content of 10% ferroboron powder, and 20 parts of ferro-boron powder with a mass content of boron. Silicon and 5 parts of manganese dioxide are placed in a ball mill jar, ball milled at 400r / min for 5h, and then passed through a 300 mesh sieve to collect the mixed ball milled powder, put the mixed ball milled powder in a graphite crucible, and then place the graphite crucible at 130°C In the vacuum tube furnace, then pass argon to remove the air. Under the argon atmosphere, keep warm and preheat for 15 min...

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Abstract

The invention discloses a preparation method of a double-layer high-strength corrosion-resistant iron-based amorphous composite coating, which belongs to the technical field of amorphous coating preparation. In the present invention, the mixed iron-based powder is melted and plasma sprayed on the surface of the stainless steel plate to form an amorphous coating with a high degree of crystallization, and then a corrosion-resistant coating is formed by nickel plating, and then it is laser clad to form an amorphous coating. The coating, through the intermediate layer with high crystallinity, delays the secondary crystallization degree of the mixed alloy during laser cladding, and effectively enhances the mechanical strength of the crystal. The double-layer wear-resistant and corrosion-resistant iron-based amorphous composite coating prepared by the present invention has excellent Wear-resistant and corrosion-resistant properties have great potential in the application of surface coating materials, and the double-layer wear-resistant and corrosion-resistant iron-based amorphous composite coating prepared by the present invention has a high degree of bonding between the coating and the substrate, and has a wide range of application prospects and use value.

Description

technical field [0001] The invention discloses a preparation method of a double-layer high-strength corrosion-resistant iron-based amorphous composite coating, which belongs to the technical field of amorphous coating preparation. Background technique [0002] In 1967, iron-based amorphous alloys were prepared for the first time, and many Fe-based amorphous alloys with excellent soft magnetic properties were discovered one after another. In addition to the characteristics of general amorphous alloys, iron-based amorphous alloys also have the following advantages: (1) Ultra-high strength and hardness: Fe-based amorphous alloys usually have a high content of non-metals. There are metal-like chemical bonds inside, so that the Fe-based amorphous alloy exhibits high fracture strength. The fracture strength of FeNbB bulk amorphous reaches 4.85GPa, much higher than 2.9GPa of crystalline super steel, and also higher than other bulk amorphous. Moreover, the microhardness of most Fe...

Claims

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Application Information

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IPC IPC(8): C23C28/02C23C4/134C23C4/08C23C24/10C25D3/12B22F9/08
CPCC23C28/026B22F9/002B22F9/082C23C4/08C23C24/106C25D3/12
Inventor 仇颖莹韩彪
Owner 仇颖莹
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