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Preparation of non-magnetic high corrosion resistant amorphous steel coating

A high-corrosion, amorphous steel technology, applied in coating, metal material coating process, heating inorganic powder coating, etc., can solve the problems of high brittleness and limitation, achieve low porosity, good magnetic properties, optimized Effects of process parameters

Inactive Publication Date: 2008-12-17
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The purpose of the present invention is to provide a method for preparing a non-magnetic, highly corrosion-resistant and wear-resistant amorphous steel coating, which solves the problem that Fe-based bulk amorphous alloys have high brittleness and are limited in engineering applications as structural materials, so that The application of bulk amorphous alloys in the field of surface engineering (especially amorphous coatings) becomes possible

Method used

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  • Preparation of non-magnetic high corrosion resistant amorphous steel coating
  • Preparation of non-magnetic high corrosion resistant amorphous steel coating
  • Preparation of non-magnetic high corrosion resistant amorphous steel coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) First, the master alloy is prepared by vacuum induction melting according to the required composition, and the nominal composition of the alloy is Fe 48 Cr 15 Mo 14 C 15 B 6 Y 2 , the amorphous alloy powder was prepared by gas atomization method, and the specific process parameters of gas atomization in this embodiment were atomization pressure 5 MPa and atomization temperature 1200°C. See Figure 1(a)-(b). The powder is spherical in shape, has good fluidity and filling ability, and is suitable as a precursor powder for thermal spraying.

[0033] (2) Then choose amorphous powder with a particle size of 16-45μm, and use supersonic flame spraying technology (HVOF). The specific process parameters are that the pressure of kerosene and oxygen are 160psi and 180psi respectively, the powder feeding speed is 65g / min, and the distance is 350mm. Gun barrel length 4-6 inch, is coated on the substrate (submarine flat bulb steel 921A), prepares amorphous coating (see figu...

Embodiment 2

[0054] The difference from Example 1 is:

[0055] The specific process parameters of supersonic flame spraying in this embodiment are spraying distance 350mm, powder feeding speed 25g / min;

[0056] Results: A non-magnetic high corrosion and wear-resistant amorphous steel coating was obtained. The coating thickness was 400 μm, the volume content of amorphous phase was about 74%, and the coating hardness was 573Hv, but the corrosion performance did not change significantly.

Embodiment 3

[0058] The difference from Example 1 is:

[0059] The supersonic flame spraying specific process parameters of the present embodiment are spraying distance 250mm, powder feeding speed 60g / min;

[0060] Results: A non-magnetic, highly corrosion-resistant and wear-resistant amorphous steel coating was obtained. The coating thickness was 600 μm, the volume content of amorphous phase was about 83%, and the coating hardness was 740Hv, but the corrosion performance did not change significantly.

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Abstract

The invention relates to a ferrous alloy with strong performance of glass formation and a technique method for preparing the coating of the amorphous alloy, in particular to a preparation method of non-magnetic amorphous steel coating with the performance of high anticorrosion and wearing resistance. The method of the invention solves the problem that large brittleness is existed in Fe-based large bulk of amorphous alloy and is a restriction as the structural material to go to engineering application, while the invention causes the application of bulk amorphous alloy to surface engineering field (especially amorphous alloy coating) to be possible. By adopting the Fe-based bulk amorphous alloy to prepare Fe-based amorphous alloy coating, firstly, mater alloy is produced by a method of vacuum induction melting according to needed components; then gas atomization technology is adopted to prepare amorphous alloy powder; supersonic thermal spray technology is adopted to prepare Fe-based amorphous alloy coating. The non-magnetic amorphous steel coating with high anticorrosion performance and wearing resistance produced by the invention is uniform, has low void ratio (less than 0.1 percent), is non-magnetic and has the performance of high anticorrosion and wearing resistance as well as vast application prospect to shell material of ships.

Description

technical field [0001] The invention relates to an iron-based alloy composition with strong glass-forming ability, and a technical method for preparing the amorphous alloy coating, in particular to a preparation method for a non-magnetic, highly corrosion-resistant and wear-resistant amorphous steel coating. Background technique [0002] In the design of modern advanced ships, higher requirements are put forward for their shell materials: [0003] (1) Non-magnetic: reduce magnetic signal; [0004] (2) High strength: anti-underwater explosion and debris impact; [0005] (3) High corrosion resistance: the annual naval corrosion loss is as high as 2 billion US dollars; [0006] (4) High friction and wear resistance; [0007] Compared with conventional polycrystalline metal materials, amorphous alloys (also known as metallic glasses) present structural characteristics of long-range disorder and short-range order, and have many excellent mechanical and physical properties, suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/08C23C4/08B22F9/08C22C45/02C23C4/06
Inventor 王建强张甲常新春侯万良倪红松
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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