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Metal base material coated with carbide coating and preparing method of metal base material

A metal-based, carbide-based technology, applied in coatings, solid-state diffusion coatings, metal material coating processes, etc., can solve the problems of inability to obtain uniform coatings, corrosion of equipment by the medium, and weak bonding force of coatings, etc., to achieve broadening Industrial application range, improvement of surface properties, effect of stabilization of salt bath components

Active Publication Date: 2017-08-01
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem solved by the present invention is to overcome the high cost of equipment, complicated process, serious corrosion of the medium to the equipment, weak bonding force of the coating, and inability to modify the surface of the metal-based material in the existing surface modification technology of metal-based materials. Obtaining a uniform coating, especially the defect that the coating of special-shaped parts and hidden surfaces cannot be implemented, provides a metal-based material coated with carbide coating and a preparation method

Method used

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  • Metal base material coated with carbide coating and preparing method of metal base material
  • Metal base material coated with carbide coating and preparing method of metal base material
  • Metal base material coated with carbide coating and preparing method of metal base material

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Embodiment 1

[0046] figure 1 It is a schematic diagram of an experimental device for in-situ preparation of a carbide coating on the surface of a metal-based material in the present invention; wherein, 1 is a heat preservation furnace body; 2 is a container crucible; 3 is a molten salt; 4 is a metal-based material; 5 is a metal-based material fixing fixture ; 6 is an inert atmosphere or vacuum; 7 is a sealed crucible cover; 8 is a closed system device.

[0047] Gray iron coated with vanadium carbide is prepared as follows:

[0048] (1) The gray iron material is cut into a sample of appropriate size by wire electric discharge, and then the surface is pre-ground and polished with metallographic sandpaper until the surface is flat and approximately mirror-like; the pre-ground gray iron sample is washed with absolute ethanol Dry with cold air after washing;

[0049] (2) First, clean the 316L stainless steel crucible with tap water, then clean it with absolute ethanol, dry it with cold air, a...

Embodiment 2

[0057] The preparation process of the gray iron covered with chromium carbide coating adopts as in embodiment 1 figure 1 experimental device.

[0058] Gray iron coated with chromium carbide is prepared as follows:

[0059] (1) The gray iron material is cut into a sample of appropriate size by wire electric discharge, and then the surface is pre-ground and polished with metallographic sandpaper until the surface is flat and approximately mirror-like; the pre-ground gray iron sample is washed with absolute ethanol Wash and dry with cold air;

[0060] (2) First, clean the 316L stainless steel crucible with tap water, then clean it with absolute ethanol, dry it with cold wind, and dehydrate it in a vacuum drying oven at 120°C for about 2 hours;

[0061] (3) Mix the fluoride mixed eutectic molten salt LiF-NaF-KF (molar ratio is 46.5:11.5:42), break it into small particles of suitable size, and put it into a 316L stainless steel crucible; wherein, the amount of solid salt added is...

Embodiment 3

[0068] The preparation process of the gray iron covered with chromium carbide coating adopts as in embodiment 1 figure 1 experimental device.

[0069] Gray iron coated with chromium carbide is prepared as follows:

[0070] (1) The gray iron material is cut into a sample of appropriate size by wire electric discharge, and then the surface is pre-ground and polished with metallographic sandpaper until the surface is flat and approximately mirror-like; the pre-ground gray iron sample is washed with absolute ethanol Wash and dry with cold air;

[0071] (2) First, clean the 316L stainless steel crucible with tap water, then clean it with absolute ethanol, dry it with cold wind, and dehydrate it in a vacuum drying oven at 120°C for about 2 hours;

[0072] (3) Mix the fluoride mixed eutectic molten salt LiF-NaF-KF (molar ratio is 46.5:11.5:42), break it into small particles of suitable size, and put it into a 316L stainless steel crucible; wherein, the amount of solid salt added is...

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Abstract

The invention discloses a metal base material coated with a carbide coating and a preparing method of the metal base material. The preparing method includes the following steps that under the inert atmosphere or vacuum atmosphere, the metal base material is added into fluoride fused salt containing a permeating agent and in the molten state, and heat preservation reacting is carried out; and the permeating agent is one or more of simple substances or oxides of chromium, vanadium, niobium, titanium, silicon and zirconium. The preparing method is simple in process, free of strict limitation to processes like the material mixing sequence, and wide in applicability. The carbide coating prepared on the surface of the metal base material is compact, even and controllable in thickness, firm metallurgical bonding is formed between the coating and a base, the bonding force is high, the surface performance of the base material is improved, and excellent performance like high hardness, the high-wearing feature, occlusal force resistance, high-temperature oxidation resistance, environment corrosion resistance and the like are achieved; and the material surface performance is improved, the service life of hardware is prolonged, and the industrial application scope of the metal material is expanded.

Description

technical field [0001] The invention relates to a metal-based material covered with a carbide coating and a preparation method. Background technique [0002] As an important structural material, metal plays an important role in industrial applications, especially in large-scale important industrial fields that determine the development of the national economy, such as automobile manufacturing, aviation manufacturing, shipbuilding and ocean engineering, and in Die processing, forging molding, precision devices and other fields as tools and mold materials. However, during the service process of metal components, there are ubiquitous failure phenomena such as wear, plastic deformation, scratches, occlusal, and corrosion under the action of environmental media, which makes the service life of components more and more prominent. Surface engineering, which flourished in the 1960s, is mainly devoted to changing the surface state of materials through physical, chemical and other me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C10/22C23C10/26C23C10/02
CPCC23C10/02C23C10/22C23C10/26
Inventor 侯娟俞国军苏兴治陈燕军谢雷东侯惠奇王建强
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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